Liquid crystal display device

FIELD: physics.

SUBSTANCE: in the liquid crystal display device, the common electrode (45) comprises a first common electrode (45a) and a second common electrode (45b). The pixel electrode (60) includes a first trunk portion (61a), a second trunk portion (61b), a plurality of first branch portions (62a) extending in the first direction, a plurality of second branch portions (62b) extending in the second direction, a plurality of third branch portions (62c) extending in the third direction, and a plurality of fourth branch portions (62d) extending in the fourth direction. When a pixel is viewed from a direction perpendicular to a plane of the TFT substrate, the boundary between the first common electrode (45a) and the second common electrode (45b) extends over the first trunk portion (61a) of the pixel electrode (60) in a same direction as the direction of the first trunk portion (61a).

EFFECT: high luminosity and quality of display.

15 cl, 15 dwg

The technical FIELD

[0001] the Present invention relates to a liquid crystal display device.

PRIOR art

[0002] At present the examples of the developed liquid crystal display devices, which have the characteristics of a wide viewing angle, includes a liquid crystal display device using the mode, IPS (in-plane switching) mode or an FFS (c switching edge of the field), which is a regime with a lateral electric field, and the liquid crystal display device using the mode, VA (vertical alignment). Among other things, the VA mode is able to achieve a high contrast ratio, and therefore it is used in many liquid crystal display devices.

[0003] Examples of liquid crystal display devices with a VA mode include a liquid crystal display device with the regime MVA (multi-domain vertical alignment), in which one pixel includes many domains of different directions of alignment of liquid crystal, and liquid crystal display device with the regime CPA (continuous alignment curl), in which the direction of alignment of liquid crystal radially continuously varies around the axis or the like, formed in the electrode is in the center of the pixel.

[0004] an Example of the liquid crystal display device with MVA mode described in Patent document 1. In the liquid crystal display device of Patent document 1 is provided controls alignment, which extend in two mutually orthogonal directions in order to form four liquid crystal domain in one pixel, in which the azimuthal angles of the Directors representing the liquid crystal domains is equal to 45° relative to the polarization axes (transmission axes) of the pair of polarizing plates in a crossed layout of Nicola. Assuming that the direction of the axis of polarization of one of the polarizing plates is the azimuthal angle 0°, and that the counterclockwise direction is the positive direction, the azimuthal angles of the Directors of the four liquid crystal domains are equal to 45°, 135°, 225° and 315°. This structure, which includes four domains in one pixel is called the “structure alignment with the four domains” or simply “structure 4D”.

[0005] Another example of a liquid crystal display device with MVA mode described in Patent document 2. In the liquid crystal display device of this patent document, a pixel electrode (also referred to as “comb pixel electrode or pixel electr the house in the form of fish bones”) has a large number of narrow slits (narrow cut), stretching at azimuthal angles of 45°, 135°, 225° and 315°. Liquid crystal is aligned parallel to these grooves, whereby structure is implemented alignment with the four domains.

[0006] In a liquid crystal display device with a VA mode display quality from the straight direction and quality of the mappings from the oblique direction can have a significant difference. In particular, in the case of a display medium scale gradations of tones, display characteristics, such as characteristic tone and range, when considering from the oblique direction can sometimes be very different from the characteristics obtained when considering from the straight direction. Optical axis direction of liquid crystal molecules is identical to the direction of the long axis of the molecules. In the case of a display medium scale level gradation halftone optical axis direction of liquid crystal molecules tilted by several degrees relative to the main surface of the substrate. Thus, in this situation, the display characteristics are different between a case when the display is viewed from the front side, and the case where the display is viewed obliquely.

[0007] In particular, the displayed image is viewed from oblique directions, in General, seems to be whitish the m compared to the displayed image, which is viewed from the straight direction. This phenomenon is also called the phenomenon "wybielania". For example, in the case when the human face is a human face in General seems to be whitish, when it is viewed from an inclined direction, and a clear expression level of the scale of gradations of tones the skin color is distorted so that the picture may appear whitish even though the expression of human faces perceived without feeling inadequate when considering direct (frontal) direction.

[0008] Liquid crystal display devices, which have a way to improve the quality of such phenomena, wybielania described in Patent documents 3-5. In these liquid crystal display device, one pixel is divided into a set of (e.g. two) podpisala, each of which includes sub-pixel electrode, and a lot of sub-pixel electrodes serves different potentials.

[0009] In the liquid crystal display device described in Patent document 3, two sub-pixel electrode connected to the different istokov lines using various switching elements and excited thereby to apply for various potentials. Since sub-pixel electrodes are at different n is tential, the voltage applied across the liquid crystal layers podpisala are different so that podpisali had different transmittances. It implements the improvement of the phenomenon of wybielania.

[0010] In the liquid crystal display device described in Patent document 4, are provided with two switching element in such a manner as to correspond to a corresponding one of the two sub-pixel electrodes, and the two switching element connected to different gate lines. At least one of the clocking signals include two gate lines is changed, whereby the packing line are excited so that the two sub-pixel electrode was kept at different potentials.

[0011] In the liquid crystal display device described in Patent document 5, provides multiple lines of storage capacity in such a way as to correspond to a corresponding one of the two sub-pixel electrodes so that the storage capacitors formed between the subpixel electrodes and the corresponding lines of the storage capacitor. Many lines of the storage capacitor serves a variety of voltage CS, whereby changes effective applied voltage across the liquid crystal layer.

A list of quotations

[0012]

Patent document 1: Japanese laid-out patent publication No. 11-242225

Patent document 2: Japanese laid-out patent publication No. 2002-357830

Patent document 3: Japanese laid-out patent publication No. 2006-209135

Patent document 4: Japanese laid-out patent publication No. 2006-139288

Patent document 5: Japanese laid-out patent publication No. 2004-62146

The INVENTION

Technical problem

[0013] In the liquid crystal display device of Patent document 3, it is necessary to provide two ishikawae line for each column of pixels so that the number stokovyh lines increased. In the liquid crystal display device of Patent document 4, you must provide two lines of gates for each row of pixels so that the number of lines of closures has increased. Additionally, in the liquid crystal display devices of Patent documents 3 and 4, you must provide a TFT for each sub-pixel electrode. Thus, in these liquid crystal display devices is reduced, the aperture ratio of the display area.

[0014] In the liquid crystal display device of Patent document 5 applied voltage across the liquid crystal layer podpisala not changed so the degree is about the difference in voltage CS. In particular, when the capacitance of the gate-drain of the TFT is large, the difference between the effective applied voltage across the liquid crystal layer podpisala is not so large, even if the voltage of CS are different, so the difference of transmittance between podpisali is not big enough. In this case, sufficient regulation characteristics of the scale gradation halftone podpisala leads to increased energy consumption so that it was difficult to effectively improve the quality of the phenomenon of wybielania.

[0015] the Present invention was conceived in view of the foregoing problems. One of the objectives of the present invention is to provide a liquid crystal display device, which can be effectively improved the phenomenon of wybielania, and can be prevented by reducing the transmittance.

Solution

[0016] the Liquid crystal display device according to the present invention includes: a TFT substrate which has a pixel electrode provided in a pixel; an opposite substrate, which has a common electrode provided opposite to the pixel electrode; and a liquid crystal layer of the vertical alignment, which is provided between the TFT substrate and the opposite substrate where the common electrode which engages a first common electrode and the second common electrode, which is able to make excellent voltage compared with the voltage applied to the first common electrode, while the pixel electrode includes a part of the first trunk line, an area of the second main line, many parts of the first branches extending from part of the first trunk line or portion of the second trunk line in the first direction, many sections of the second branch extending from part of the first trunk line or portion of the second trunk line in the second direction, many sections of the third branch extending from part of the first trunk line or portion of the second trunk line in the third direction, and many sections of the fourth branch, extending from part of the first trunk line or portion of the second trunk line in the fourth direction and the first direction, the second direction, the third direction and the fourth direction are different directions from each other, and when the pixel is viewed from the direction perpendicular to the plane of the TFT substrate, the boundary between the first common electrode and the second common electrode extends on the part of the first trunk line of the pixel electrode and extends in the same direction as the extending direction of the site per the Oh main lines.

[0017] In one embodiment, the first direction, the second direction, the third direction and the fourth direction different from the extending direction of the part of the first trunk line at 45°, 135°, 225° and 315°, respectively.

[0018] In one embodiment, the slot is provided at the boundary between the first common electrode and the second common electrode, and when a voltage is applied between the pixel electrode and the common electrode, the azimuth of the Director orientation of the liquid crystal, which is determined by the corresponding one of the many parts of the first branch, many areas of the second branch, many areas of the third branch and many sections of the fourth branch, forms an acute angle with the azimuth of the Director orientation of the liquid crystals, which is determined by the first common electrode, the second common electrode and the slot.

[0019] In one embodiment, the acute angle of approximately 45°.

[0020] In one embodiment, the pixel electrode includes many sections of the fifth branch extending in the first direction, many sections of the sixth branch extending in the second direction, many sections of the seventh branch extending in the third direction, and many of the plots eighth branches extending in the fourth direction.

[0021] In one variationbetween, when voltage is applied between the pixel electrode and the common electrode, a lot of parts of the first branch, many sections of the second branch, many sections of the third branch and many sections of the fourth branch form four domains, which have different orientation of the liquid crystals, and many sections of the fifth branch, many sections of the sixth branch, many sections of the seventh branch and many of the plots eighth branches form the four other domain, which have different orientation of liquid crystals.

[0022] In one embodiment, when the pixel is viewed from the direction perpendicular to the substrate plane of the TFT, many parts of the first branch, many sections of the second branch, many sections of the seventh branch and many of the plots eighth branch are provided in such a manner as to extend over the first common electrode, and many of the plots of the third branch, many sections of the fourth branch, many sections of the fifth branch and many of the plots sixth branches are provided so as to extend above the second common electrode.

[0023] In one embodiment, the second pixel common electrode includes the area of the first electrode and the area of the second electrode, between which is located the first common electrode, and when the pixel within the reviews from the side direction, perpendicular to the substrate plane of the TFT, many sections of the third branch and many sections of the fourth branch are provided in such a manner as to extend over the area of the first electrode, and many sections of the fifth branch and many of the plots sixth branches are provided so as to extend over the area of the second electrode.

[0024] In one embodiment, the pixel electrode includes a main section of the third line and the fourth section of the trunk line, and many of the plots of the fifth branch, many sections of the sixth branch, many sections of the seventh branch and many of the plots eighth branches extend from the section of the third trunk line or portion of the fourth trunk line.

[0025] In one embodiment, when the pixel is viewed from the direction perpendicular to the plane of the base of the TFT, the boundary between the area of the first electrode of the second common electrode and the first common electrode extends over part of the first trunk line and extends in the same direction as the direction of the stretch part of the first trunk line, and the boundary between the area of the second electrode of the second common electrode and the first common electrode extends over the section of the third trunk line and extends in the same direction as the direction of the stretch section of the third trunk line.

[0026] In one embodiment, the liquid crystal display device additionally includes another pixel that is adjacent to the pixel, while the other pixel includes the area of the second common electrode, and when the pixel and the other pixels are viewed from the direction perpendicular to the substrate plane of the TFT, the second shared pixel electrode and the second common electrode of another pixel is provided between the first pixel electrode and the first common electrode of the other pixel.

[0027] In one embodiment, the shape of the pixel electrode of the pixel and the shape of the pixel electrode of another pixel are symmetrical with respect to the boundary between the second shared pixel electrode and the second common electrode of another pixel.

[0028] In one embodiment, the slot is provided between the second shared pixel electrode and the second common electrode of another pixel.

[0029] In one embodiment, the liquid crystal display device additionally includes another pixel that is adjacent to the pixel where the other pixel includes the area of the second common electrode, and when the pixel and the other pixels are viewed from the direction perpendicular to the plane is oblozhki TFT, the second shared pixel electrode is provided between the first pixel electrode and the first common electrode of another pixel, and the first common electrode of another pixel is provided between the second shared pixel electrode and the second common electrode of another pixel.

[0030] In one embodiment, the liquid crystal display device additionally includes another pixel that is adjacent to the said pixel, and a slot is provided between the common pixel electrode and the common electrode of another pixel.

[0031] In one embodiment, the liquid crystal display device additionally includes a layer of maintaining alignment on the surface of at least one of: the TFT substrate and the opposite substrate, which is located closer to the liquid crystal layer, and a layer of maintaining alignment configured to determine the orientation of the liquid crystal in the absence of applied voltage, and a layer of maintaining alignment made of polymer, which is obtained by photopolymerization photopolymerizable monomer contained in the liquid crystal layer in the presence of applied voltage across the liquid crystal layer.

[0032] In one embodiment, the liquid crystal device is in display additionally includes a display area, which includes a set of pixels and a peripheral area outside the display area, where each of the first common electrode and the second common electrode is divided into many segments, linearly extending parallel to each other in the display area, and many segments of the first common electrode and the many segments of the second common electrode are provided alternately in the peripheral region many segments of the first common electrode are connected together and connected to a section of the first terminal (output), and many segments of the second common electrode are connected together and connected to a section of the second terminal (output), and in the peripheral area of the conductive path of the first General electrode and the conductive path of the second common electrode generally arranged symmetrically.

The predominant effects of the invention

[0033] According to the present invention can be provided a liquid crystal display device in which improved the phenomenon of wybielania and the reduction of the transmittance.

BRIEF DESCRIPTION of DRAWINGS

[0034]

[Fig. 1] a Perspective view schematically showing the configuration of a liquid crystal display device 100 according to a variant implementation of the present invention.

[Fig. 2] top View schematically showing the configuration is the information set of the pixels 50 in the liquid crystal device 100 of the display.

[Fig. 3] top View showing the configuration of the pixel electrode 60 of the pixel 50 in the embodiment 1 of the present invention.

[Fig. 4] the cross-sectional View showing the configuration of a pixel 50 options exercise 1, which is taken along the line a-a' in Fig. 3.

[Fig. 5] (a) is a top view showing the shape of the common electrode 45 in the pixel 50 variant implementation 1; (b) is a top view showing the relation of arrangement between the pixel electrode 60 and the common electrode 45 in the pixel 50.

[Fig. 6] a top View showing the shape of the arrangement of the common electrode 45 in the liquid crystal device 100 of the display of the present invention.

[Fig. 7] (a)-(c) are diagrams to illustrate the alignment of the liquid crystal in the liquid crystal device 100 of the display case for 1.

[Fig. 8] (a) is a top view showing the shape of the common electrode 45 in the pixel of the liquid crystal display device of the comparative example; (b) is a top view showing the relation of arrangement between the pixel electrode 60 and the common electrode 45 in the pixel.

[Fig. 9] (a)-(c) are diagrams to illustrate the alignment of the liquid crystal in the liquid crystal display device of comparative example.

[Figure 10] (a) is a top view, showing the shape of the common electrode 45 in the pixel 50 variant implementation of the 2 liquid crystal display device of the present invention; (b) is a top view showing the shape of the pixel electrode 60 in the pixel 50 variant implementation 2.

[Fig. 11] (a) is a top view showing the shape of the common electrode 45 in two adjacent pixels 50 in the embodiment 2; (b) is a top view showing the relation of arrangement between the pixel electrode 60 and the common electrode 45 in these two pixels 50.

[Fig. 12] (a)-(c) are diagrams for illustrating the configuration of the common electrode and the alignment of liquid crystal in the liquid crystal display device of the second comparative example.

[Fig. 13] (a)-(c) are diagrams to illustrate the alignment of the liquid crystal in the liquid crystal device 100 of the display case for 2.

[Fig. 14] (a) is a top view showing the shape of the common electrode 45 in two adjacent pixels 50 in the liquid crystal device 100 of the display case for 3 of the present invention; (b) is a top view showing the relation of arrangement between the pixel electrode 60 and the common electrode 45 in these two pixels 50.

[Fig. 15] (a) and (b) are diagrams d is I, to illustrate the alignment of the liquid crystal in the liquid crystal device 100 of the display case for 3.

DESCRIPTION of embodiments

[0035] further, the liquid crystal device 100 of the display according to a variant implementation of the present invention is described with reference to the drawings. However, it should be noted that the present invention is not limited to the embodiment described below.

[0036] Fig. 1 is a perspective view schematically showing the configuration of a liquid crystal display device 100. Fig. 2 is a top view schematically showing the configuration of a set of pixels 50 of the liquid crystal display device 100.

[0037] As shown in Fig. 1, the LCD device 100, the display includes 10 TFT substrate and the opposite substrate (the substrate is a color filter (CF)) 20, which are located opposite each other with the liquid crystal layer 30 is inserted between them, the polarizers 26 and 27, which are provided on the outer side of the corresponding one of: 10 TFT substrate and the opposite substrate 20, and the block 28 of the backlight to emit the display light in the direction of the polarizer 26.

[0038] the Liquid crystal device 100 of the display is a liquid crystal device is of tabraani type with vertical alignment, which performs display in a normal black mode, using the many pixels 50, which are in a matrix arrangement along the direction X (horizontal direction in the drawing) and Y direction (vertical direction in the drawing), as shown in Fig. 2. The pixel 50 corresponds to the display area of any color of R, G and B in the minimum unit of display, consisting of the three primary colors: red (R), green (G) and blue (B). It should be noted that the minimum unit of display may consist of four or more primary colors (color display with lots of primary colors). In this case, the pixel 50 corresponds to the display area of any one of the many primary colors that form a minimum unit of display.

[0039] In the substrate 10 TFT many lines 14 of the scanning lines of the bus gates) and many lines 16 signal (data bus lines) arranged in such a way as to cross each other at right angles. Near each of the intersections of multiple scan lines 14 and many of the lines 16 of the signal provided to the transistor TFT 12, which is an active element, for each of the pixels 50. In each of the pixels 50 is provided with a pixel electrode 60, which is electrically connected to the electrode of the discharge TFT 12 and which is made, for example, of ITO (indium oxide and tin) or IZO (hydroxy is and indium and zinc). Between two adjacent scanning lines 14 may be secured line of the storage capacitor (also called “line bus of the storage capacitor” or “line Cs”) 18, which extends parallel to the scanning lines 14.

[0040] the Multiple scanning lines 14 and the multiple signal lines 16 are respectively connected to the circuit 22 excitation scan lines and the circuit 23 of the excitation signal line, which is shown in Fig. 1. Scheme 22 excitation scan lines and the circuit 23 of the excitation signal line connected to the circuit 24 controls. According to the control using the circuit 24 controls the scanning signals to the switching state of the on / off transistor TFT 12 is provided from the circuit 22 of the excitation lines of the scanning lines 14 scan. Moreover, according to the control circuit 24 of the control signals of the display (the applied voltage to the pixel electrode 60) are served from the circuit 23 of the excitation signal lines many lines 16 signal.

[0041] the Substrate 10 TFT includes, as shown in Fig. 4, the transparent substrate 32, an insulating layer 34 and the film 36 alignment (vertical alignment film for vertical alignment liquid crystal with respect to the substrate plane. The scanning line 14 is provided between the transparent substrate 32 and the insulating layer 34. kiselny electrode 60 is provided between the insulating layer 34 and the film 36 alignment. The opposite substrate 20 includes a transparent substrate 42, a color filter 44, the common electrode (counter-electrode) 45 and the film 46 alignment, which is a vertical alignment film. In the case of displaying the three primary colors of a color filter 44 includes R (red) filter, a G (green) filter, and B (blue) filter, each of which is arranged in such a manner as to correspond to the pixel. The common electrode 45 is formed to extend over multiple pixel electrodes 60. Molecules of liquid crystal, lying between these electrodes are aligned in each pixel according to the potential difference caused between the common electrode 45 and each of the pixel electrodes 60, through which runs the display.

[0042] the liquid crystal layer 30 includes a nematic liquid crystal that has negative dielectric anisotropy (Δε<0). In the absence of applied voltage to liquid crystal of the liquid crystal layer 30 as a whole is vertically aligned with respect to the substrate plane for 10 TFT substrate or the opposite substrate 20 due to the feature films 36 and 46 of the alignment. However, it should be noted that it may be possible variant of implementation, which formed only one of the two films 36 and 46 of the alignment.

[0043] To the each of the films 36 and 46 alignment includes a vertical alignment layer, which is a function of the vertical alignment liquid crystal to the substrate plane, and a layer of maintaining alignment, which forces the liquid crystal in the absence of applied voltage to be predacon. Layers maintain alignment made of polymer, which is produced by photopolymerization photopolymerizable monomer contained in the liquid crystal layer in the presence of applied voltage to the liquid crystal layer after forming the liquid crystal cell. Because of the layers maintain alignment even in the absence of the applied voltage of the liquid crystal can support (to remember) predation, which occurs in a slightly inclined direction (approximately 2-3°) from the direction which is vertical to the substrate plane and the azimuth orientation (azimuth of prednislone). This method is called alignment with a supported polymer (PSA). Through the use of this method can be increased responsiveness orientation of the liquid crystal at the time of application of voltage. However, it should be noted that it may be possible configuration in which only one of the two films 36 and 46 of the alignment layer has maintain alignment, or a configuration in which each of the two alignment films assortment of the company includes only the layer of the vertical alignment.

[0044](An implementation option 1)

Fig. 3 is a top view showing the configuration of the pixel electrode 60 of the liquid crystal display device 100 according to a variant implementation 1 of the present invention. Fig. 4 is a cross-section view showing the configuration of the pixel 50, which is made along the line a-a' in Fig. 3. It should be noted that in all the descriptions of embodiments of the present invention, the direction of stretch lines 14 scan (horizontal direction in Fig. 3) is called the “X-direction”, the direction of stretch lines 16 scan (vertical direction in Fig. 3) is called the “Y-direction”and the direction that is perpendicular to the substrate plane of liquid crystal display device 100 (including the plane of the substrate 10 TFT), is called the “Z-direction”. The positive X-direction (the direction from left to right in Fig. 3) is identical to the azimuth angle of 0°with respect to which the azimuthal angles are assigned in a counterclockwise direction. The positive Y-direction (upward direction in Fig. 3) is identical to the azimuth angle of 90°.

[0045] In each of the pixels 50 is provided a pixel electrode 60, which has the shape of a fish bone. The pixel electrode 60 includes a section 61a of the trunk is the turn, extending in the X-direction (part of the first trunk line), section 61b trunk lines extending in the Y direction (the part of the second main line), many sections 62a branches (parts of the first branch), extending from section 61a trunk line or portion 61b main line in the direction of 45° (the first direction), many sections 62b branches (sections of the second branch), extending from section 61a trunk line or portion 61b main line in the direction of 135° (the second direction), many sections 62c branches (sections of the third branch), stretching from the site 61a trunk line or portion 61b main line in the direction of 225° (third direction), and many sections 62d leg sections of the fourth branch), extending from section 61a trunk line or portion 61b main line in the direction of 315° (fourth direction).

[0046] the Pixel electrode 60 additionally includes a section 61c trunk lines extending in the X direction (the main section of the third line), the area 61d trunk lines extending in the Y direction (section fourth main line), many sections 62e branches (sections fifth branch), extending from section 61c trunk line or portion 61d main line in the direction of 45°, the lot is of Chertkov 62f branch (plots sixth branch), extending from section 61c trunk line or portion 61d main line in the direction of 135°, many of the plots 62g branches (sections seventh branch), extending from section 61c trunk line or portion 61d main line in the direction of 225°, and many of the plots 62h branches (sections eighth branch), extending from section 61c trunk line or portion 61d main line in the direction of 315°.

[0047] as the pixel electrode 60 has the above form, slot (space, which is not provided with the electrode material) is formed between two adjacent sections 62a-62h branches in such a way as to extend in the same direction as the two adjacent electrode branches. Each of the sections 62a-62h branches and each slot has a width of 3.0 μm, for example. If the width of the sections of the branches and the width of the slots will be excessively large or excessively small, the power management alignment will not work in the extending direction of sites and branch cuts. Thus, the width of the sections of the branch and of the slots is preferably in the range of not less than 2.0 μm and not more than 5.0 µm.

[0048] because of the function of the pixel electrode 60, which has the above form, a multi-domain configuration patterns 4D, consisting of eight domains formed in the pixel 50. In the absence of an application is spent voltage because of the function film 36 and 46 of the alignment of liquid crystal in the pixel 50 is predacon in a slightly inclined direction from the direction, perpendicular to the substrate plane. The azimuth of prednislone is identical to the azimuth stored in the layer maintain alignment, i.e. in the direction along the sections 62a-62h and branch cuts, and, in other words, is identical to the direction tilted at 45° from the direction X or direction y

[0049] When the applied voltage, the liquid crystal in each domain is oriented so that the main area of the liquid crystal (the end of the liquid crystal, which is closer to the opposite substrate) fell into the inner section (or the section of the main line) of the pixel 50, and the liquid crystal is switched to the position parallel to the substrate plane. The azimuth orientation is essentially identical to the azimuth of prednislone. Since the azimuth orientation is identical to the azimuth of prednislone implemented transition orientation to the correct azimuth with a very fast speed of response.

[0050] Thus, when the applied voltage region 51a is formed on top of the many sections 62a branches, domain 51b is formed on top of the many sections 62b branches, domain 51c is formed on top of the many sections 62c branches, domain 51d is formed over many sections 62d branches, domain 51e is formed over many sections 62e branches, domain 51f is formed over many sections 62f branches, domain 51g Fort which varies over many areas 62g branches, and domain 51h is formed over many 62h plots branches.

[0051] the Polarizers 26 and 27, shown in Fig. 1, arranged in such a way that one of the polarizers had an absorption axis extending in the X direction, and another polarizer had an absorption axis extending in the Y direction (layout crossed Nicola). The directions of the absorption axes differ from each direction of many sections 62a-62h branches at 45°. Therefore, the alignment of liquid crystal in each of the domains 51a-51h is also different from the directions of the absorption axes at 45°. This configuration allows the display in which the luminance is high, and the dependence of the azimuthal angle of the luminance is small.

[0052] the Pixel electrode 60 has a counter-electrode 65 of the storage capacitor provided in the Central part of the pixel 50. Under the counter-electrode 65 of the storage capacitor is provided shown electrode of the storage capacitor, which is electrically connected to line 18 of the storage capacitor. The storage capacitor is formed between the electrode of the storage capacitor and the counter-electrode 65 of the storage capacitor. However, it should be noted that the counter-electrode 65 of the storage capacitor may be provided below the pixel electrode 60 with the insulation film inserted between them. In this case, the pixel electric is on 60 and a counter-electrode 65 of the storage capacitor are electrically connected together through the contact hole, formed in the insulating film.

[0053] Fig. 5 (a) shows a shape of the common electrode 45 in one of the pixels 50. Fig. 5 (b) shows the ratio of the location between the common electrode 45 and the pixel electrode 60 in one of the pixels 50.

[0054] As shown in Fig. 5 (a), the common electrode 45 includes a first common electrode 45a and the second common electrode 45b. In the present description is separated and thus the common electrode is called the “single common electrode. In one of the pixels 50 of the first common electrode 45a is inserted between the two second common electrodes 45b1 (the first area of the electrode) and 45b2 (the second section of the electrode). There are slots 47 (space, which is not provided with the electrode material) (47a and 47b) between the first common electrode 45a and the second common electrode 45b1, and between the first common electrode 45a and the second common electrode 45b2, respectively. The width of the slots 47a and 47b is from 6.0 μm to 10.0 μm.

[0055] the Second common electrode 45b1 is integral with the upper second common electrode 45b2 adjacent pixel 50 on the bottom side (the side of the negative Y-direction). The second common electrode 45b2 is one with the lower second common electrode 45b1 adjacent pixel 50 on the upper side (the positive direction of Y).

[0056] When the second common electrodes 45b two adjacent pixels 50 connected to each other, di is the sector 53c of the liquid crystal in the border area of the second common electrode 45b1 oriented in azimuth 90°, and Director 53c of the liquid crystal in the border area of the second common electrode 45b2 oriented in the azimuth of 270°, because of the slots formed between the pixel electrode 60 of the substrate 10 TFT. The Directors 53b liquid crystal sections 62c-62d branches extending over the second common electrode 45b1, oriented in the azimuth of 45° and 135°, and the Directors 53b liquid crystal sections 62e and 62f branches extending over the second common electrode 45b2, oriented in azimuth 225° and 315°. Therefore, the angle formed between the azimuth Director 53c of the liquid crystal, which is achieved through the slots formed between the pixel electrode 60 of the substrate 10 TFT, and the azimuth Director 53b of the liquid crystal, which is achieved by sections 62c, 62d, 62e and 62f branches, is an acute angle, in particular equal to 45°. Thus, will not be an infringement of the alignment in the border region, which will be described later by means of the comparative example in Fig. 9.

[0057] When the second common electrodes 45b two adjacent pixels 50 are separate from each other, there is the other slot between the second common electrode 45b1 and the second common electrode 45b2. However, the substrate 10 TFT, located under the common electrode also has a slot between the pixel electrode 60 of these two pixels 50, and therefore this section is not formed electric the field so to the liquid crystal maintained its original alignment. Thus, in the embodiment 1 or in the case where the second common electrode 45b1 combined with part of the second common electrode 45b2 adjacent pixel, or when the second common electrode 45b1 and the second common electrode 45b2 are separate from each other by slots, there is no problem in the alignment characteristics of liquid crystal, and will not be an infringement of the alignment in the boundary region between the pixel electrodes.

[0058] As shown in Fig. 5 (b), when considering from the Z-direction boundary between the first common electrode 45a and the second common electrode 45b1 and the slot 47a extending above section 61a main line of the pixel electrode 60 and extend in the same direction as the direction of the stretch section 61a of the first trunk line. The boundary between the first common electrode 45a and the second common electrode 45b2 and slot 47b extending above the section 61c main line of the pixel electrode 60 and extend in the same direction as the direction of stretch of land 61c trunk line.

[0059] When considering by direction of the Z many sections 62a branches, many sections 62b branches, many sections 62g branches and many 62h plots branches arranged in such a way as to copypasters over the first common electrode 45a. Many sections 62c branches, many sections 62d branches, many sections 62e branches and many sections 62f branches arranged in such a manner as to extend over the second common electrode 45b. More specifically, many sections 62c branches and many sections 62d branches arranged in such a manner as to extend over the area 45b1 the first electrode of the second common electrode 45b. Many sections 62e branches and many sections 62f branches arranged in such a manner as to extend over the area 45b2 second electrode of the second common electrode 45b.

[0060] Fig. 6 schematically shows the configuration of the common electrode 45 in the opposite substrate 20.

[0061] As shown in Fig. 6, the LCD device 100, the display has a region 110 of the display, which includes a set of pixels and a peripheral region 111, which is outside the scope of the display 110 (in the peripheral area of the liquid crystal display device 100). In the area 110 of display many segments of the first common electrode 45a, which have a constant width, extend linearly in the positive X direction, and many segments of the second common electrode 45b, which have a constant width, extend linearly in the negative direction X. Many segments of the first common electrode 45a and many segments the s second common electrode 45b is arranged so that to be parallel to each other and to alternately take place when considering along the direction Y. Each of these sets of segments of the first common electrode 45a extends through the Central portion of one row of pixels. Each of these sets of segments of the second common electrode 45b extends so as to overlap with two adjacent rows of pixels.

[0062] Many segments of the first common electrode 45a are combined into one signal line (or electrically connected together) on the left side of the peripheral region 111 and are connected to the input terminal (first terminal). Many segments of the second common electrode 45b formed on the right side of the peripheral region 111 and connected to the other input terminal (the second terminal). In the peripheral region 111 generally symmetrically arranged conductive path of the first common electrode 45a and the conductive path of the second common electrode 45b except that many segments are offset in the Y direction between the common electrodes.

[0063] In Fig. 6, each of the first common electrode 45a and the second common electrode 45b is schematically expressed by a straight line without width, which is different from the actual electrode. This is done for the sake of simple illustration of the layout, where the first common electrode 45a and the second common electrode 45b in turn shall have place in the area of display 110. The actual shape of the electrode and the actual position of the first common electrode 45a and the second common electrode 45b may not be identical to those shown in Fig. 6.

[0064] it is Possible to apply different voltages to the set of first common electrodes 45a and many second common electrode 45b. The voltage fed to the set of first common electrodes 45a (first common voltage, and the voltage fed to the set of second common electrodes 45b (the second common voltage)generated in the control circuit of the liquid crystal display device 100 or in an external schema.

[0065] since the common electrode 45 and the pixel electrode 60, which have the above-described configuration, provided in the pixel 50, the voltage applied between the first common electrode 45a and many sections 62a branches, many sections 62b branches, many sites 62g branches and many of the plots 62h branches, and the voltage applied between the second common electrode 45b and many sections 62c branches, many sections 62d branches, many sections 62e branches and many sections 62f branches can be different voltages. When these stresses are excellent, the tilt of the liquid crystal domains 51a, 51b, 51g and 51h (called “first domains 4D) and the tilt of liquid crystal domains, 51c, 51d, 51e and 51f (called “second domains 4D) are excellent there are thus, to the transmittance in the first domain 4D and transmittance of second domains 4D were different. Thus, the two luminance and two characteristics of the transmittance (the ratio between the transmittance and the voltage (relative voltage value to the maximum applied voltage in each domain), also called “characteristic V-T”)can be simultaneously implemented in one pixel 50.

[0066] Because the characteristic of the transmittance of the first domains 4D and the characteristic of the transmittance of the second domains 4D may be different, the overall transmittance of the whole single pixel 50 may be implemented by a combination of two distinct characteristics of the transmittance. Thus, through the modulation of the applied voltage to the first common electrode 45a and the second common electrode 45b, the characteristic of the transmittance and the dependence of the polar angle of transmittance of a pixel 50 can be changed to the more perfect. It should be noted that under this option the implementation in the case of a display medium scale level gradation halftone voltage is modulated so that the luminance of the area that includes the first common electrode 45a, was lower than the luminosity is of castka, includes a second common electrode 45b. In particular, the area of the pixel 50 includes a first common electrode 45a, forms a more dark area, and another area of the pixel 50 includes a second common electrode 45b, creates a brighter area.

[0067] In the liquid crystal device 100 of the display from the present case for the 4D structure is used so that the difference in luminance that occurs when the display is viewed from different azimuthal angles (the dependence of the azimuthal angle), was small. Additionally, double the total excitation is performed using a separate configuration of the common electrode so that the difference in luminance that occurs when the display is viewed from different polar angles (also called “characteristic of the angle or offset γ”), was also small.

[0068] in Addition, according to the liquid crystal device 100 of the display of this variant implementation, the received other benefits, which are described below.

[0069] Fig. 7 (a) is a chart showing the distribution of the transmittance (the distribution of luminosity in the case, when you specify the maximum luminance in the pixel 50 in the presence of applied voltage. Fig. 7 (b) and 7 (c) are diagrams to Illus is to illustrate the alignment of the liquid crystal 52 in this case. An example of the alignment described in the present description, is achieved under the conditions that the voltage applied to the first common electrode 45a and the second common electrode 45b, was equal to 0 V, and the voltage applied to the pixel electrode 60, was equal to 5 V.

[0070] In the present description in charts to illustrate the alignment of the liquid crystal 52 shows the alignment is achieved when the same voltage is applied to the first common electrode 45a and the second common electrode 45b. However, when different voltages are applied to the first common electrode 45a and the second common electrode 45b, orientation (Directors) of the liquid crystal, viewed from the direction Z, are the same, except where a more dark area and a brighter area.

[0071] In Fig. 7(b) (position) 52a is a liquid crystal which is aligned near the slots 47 of the common electrode 45, and 52b is a liquid crystal which is aligned in the field, excluding the proximity of the slot 47 (greater area of the liquid crystal in each domain). In other words, 52a is a liquid crystal which is aligned according to the power control alignment of the slot 47, and 52b is a liquid crystal which is aligned according to the power control alignment sections 61a-61h trunk lines and slits pixelin the first electrode 60.

[0072] In Fig. 7(c) (position) 53a represents the orientation (Director) of the liquid crystal 52a and 53b is the Director of the liquid crystal 52b (which is generally equivalent to the average Director of the liquid crystal in each domain). In other words, 53a represents the azimuth of the Director alignment of liquid crystal, which is determined by the first common electrode 45a, the second common electrode 45b and the slot 47 in the presence of applied voltage between the pixel electrode 60 and the common electrode 45, and 53b represents the azimuth of the Director alignment of liquid crystal, which is determined by many sections 62a-62h branches in each of the domains 51a-51h in the presence of applied voltage. It should be noted that in Fig. 7(b) the end of the liquid crystal 52, which is located closer to the opposite substrate 20, is expressed circle. In Fig. 7(c) the direction to the opposite substrate 20 is expressed by the arrows of Directors 53a and 53b.

[0073] As seen from Fig. 7 (a), according to the liquid crystal device 100 of the display in General a homogeneous distribution of the luminosity is achieved in each domain in the presence of applied voltage. As can be seen from Fig. 7 (b) and 7 (c), Director 53a liquid crystal 52a is oriented in the direction of the slot 47 so as to be perpendicular to the extending direction of the slot 47, as the electric the field is weak near the slot 47. Director 53b liquid crystal 52b is oriented in the direction along the sections of the branches of the pixel electrode 60, i.e. in a direction that differs from the Director 53a 45°. The angular difference between the Director 53a and Director 53b, θ₁is 45°, which is relatively small differences, and these Directors intersect each other at an acute angle. Thus, disturbance of alignment of liquid crystal at the boundary between the liquid crystal 52a and liquid crystal 52b is unlikely to occur (or the occurrence of violations of the alignment is limited within a narrow region), thus, the desired alignment of liquid crystal alignment along the sections of the branches of the pixel electrode 60) can be obtained in a great area. As a result, can be obtained relatively uniform distribution of luminance across the pixel 50, as shown in Fig. 7 (a).

[0074] the Following describes a comparative exemplary liquid crystal display device with reference to Fig. 8 and Fig. 9 for comparison with the liquid crystal device 100 of the display case for 1.

[0075] Fig. 8 (a) shows a shape of the common electrode 45 in one pixel comparative exemplary liquid crystal display device. Fig. 8 (b) shows the configuration of the pixel electrode 160 in one pixel and the ratio of loc is the position between the common electrode 45 and the pixel electrode 160.

[0076] the Common electrode 45 of the comparative example has the same shape as the shape of the common electrode 45 of options exercise 1, as shown in Fig. 8 (a). The pixel electrode 160 includes, when considering from the direction Z, which is shown in Fig. 8 (b), section 161a trunk lines extending in the X-direction section 161b of trunk lines extending in the Y direction, many sections 162a branches extending from the plot 161a main line or section 161b of the trunk line in the direction of 45°, many sections 162b branches extending from the plot 161a main line or section 161b of the trunk line in the direction of 135°, many of the plots 162c branches extending from the plot 161a main line or section 161b of the trunk line in the direction of 225°, and many of the plots 162d branches extending from the plot 161a main line or section 161b of the trunk line in the direction of 315°.

[0077] When considering from the Z-direction boundary between the first common electrode 45a and the second common electrode 45b1 and the slot 47a arranged in such a way as to expand the areas 162c and 162d branches, not overlapping plot 161a main line of the pixel electrode 160. In addition, the boundary between the first common electrode 45a and the second common electrode 45b2 and slot 47b arranged in such a way that h is ordinary to expand the sections 162a and 162b branches, not overlapping plot 161a main line of the pixel electrode 160.

[0078] Fig. 9 (a) is a chart showing the distribution of the transmittance of a pixel in the comparative example in the presence of applied voltage. Fig. 9 (b) and 9 (c) are diagrams for illustrating alignment of liquid crystal 52 in this case. The voltage applied to the first common electrode 45a and the second common electrode 45b, 0 V, and the voltage applied to the pixel electrode 160 is 5 V, which are the same as the conditions for the alignment shown in Fig. 7.

[0079] In the present description in charts to illustrate the alignment of the liquid crystal 52 shows the alignment is achieved when the same voltage is applied to the first common electrode 45a and the second common electrode 45b. However, when different voltages are applied to the first common electrode 45a and the second common electrode 45b, orientation (Directors) of the liquid crystal, viewed from the direction Z, are the same except for those which are formed more dark area and a brighter area.

[0080] Fig. 9 (a) shows the distribution of transmittance in a pixel in the presence of applied voltage. Fig. 9 (b) and 9 (c) are diagrams for illustrating alignment of liquid crystal 52 in this is the learn. In Fig. 9 (b) (position) 52a is a liquid crystal which is aligned near the slots 47 of the common electrode 45, and 52b is a liquid crystal which is aligned in the field, excluding the proximity of the slot 47. In Fig. 9 (c) 53a represents the orientation (Director) of the liquid crystal 52a and 53b is the Director of the liquid crystal 52b. It should be noted that in Fig. 9 (b) the end of the liquid crystal 52, which is located closer to the opposite substrate 20, is expressed circle. In Fig. 9 (c) the direction to the opposite substrate 20 is expressed by the arrows of Directors 53a and 53b.

[0081] As can be seen from Fig. 9 (a), in the comparative exemplary liquid crystal display device uniform distribution of luminance is not obtained in each domain in the presence of applied voltage, and inhomogeneous distribution of the luminosity can be seen in the inner parts, and not in the slots 47, which are indicated by white dashed circles in the drawing. This was caused by the following reasons.

[0082] As can be seen from Fig. 9 (b) and 9 (c), near the slits 47 Director 53a liquid crystal 52a is oriented in the direction of the slot 47 so as to be perpendicular to the extending direction of the slits 47. Director 53b liquid crystal 52b is oriented in the direction along the sections of the branches of the pixel electrode 160. In the present description, since the slits 47 Peres shall indicate the relevant domains, to expand the sections 162a-162d branches, the angular difference between the Director 53a and Director 53b, θ₂is 135°, which is a large obtuse angle in the inner parts than in the corresponding slots 47 (sites are located closer to the center of the pixel). So called large twisting between the liquid crystal 52a and liquid crystal 52b, causing disruption in the alignment in the liquid crystal. As seen from Fig. 9 (a), non-uniform distribution of luminance occurs in each domain. In addition, another possible flaw is that the speed of response of the alignment of the liquid crystal at the time of application of voltage is slow.

[0083] According to the liquid crystal device 100 of the display of the option exercise 1 the difference between the principal Director 53b and Director 53a near the slots 47 in each domain forms a relatively small acute angle. Therefore, misalignment, such as alignment, which takes place in the comparative example, will not take place, and prevents the appearance of non-uniform distribution of luminance in the display. The result of the comparison of the luminosity between the liquid crystal device 100 of the display case for 1 and comparative example is that the luminance of the liquid crystal display device 100 of the option is sushestvennee 1 was higher than the luminance of the comparative example by about 5%. An implementation option 1 and comparative example were also compared in relation to the origin of a lack of display in the display medium scale gradations of tones. In the comparative example was discovered blurred display, whereas the blurred display was not detected in the liquid crystal device 100 of the display of the option exercise 1.

[0084] According to the liquid crystal device 100 of the display case for 1 in the case when the layer maintain alignment generated using the above method PSA, the difference between the Director 53b and Director 53a in the formation of this layer to maintain alignment may be at a relatively small acute angle. Therefore, to prevent the violation of alignment, which can take place when you commit prednasone liquid crystal layer to maintain alignment. Thus, the alignment of liquid crystal with a more appropriate orientations stored in the layer maintain alignment so that the alignment of liquid crystal, which occurs when the applied voltage could be completed within a shorter period of time.

[0085](An implementation option 2)

Below the LCD device 10 display options exercise 2 according to the present invention is described with reference to Fig. 10-13. In the following description of a variant of implementation of the same elements as the elements of the case for 1, and elements that have the same functions as the functions of the option exercise 1 are denoted by the same numbers, positions, and descriptions of these elements and descriptions of the effects achieved by these elements are omitted. The liquid crystal device 100 of the display case for 2 includes the same elements as the elements of option exercise (1) excluding items, the differences will be illustrated or described below.

[0086] Fig. 10 (a) shows a shape of the common electrode 45 in one pixel 50. Fig. 10 (b) shows a shape of the pixel electrode 60 in one pixel 50. Fig. 11 (a) shows the common electrodes 45 in two adjacent pixels 50a and 50b, which are adjacent along the direction Y. Fig. 11 (b) shows the ratio of the location between the common electrode 45 and the pixel electrodes 60 in these two pixels 50a and 50b.

[0087] As shown in Fig. 10 and Fig. 11 (a), the common electrode 45 includes a first common electrode 45a and the second common electrode 45b. When considering the from direction Z of the second common electrode 45b pixel 50a is attached to the second common electrode 45b adjacent pixel 50b on the bottom side (the side of the negative Y-direction). These two second common electrode 45b is provided between the p is pout common electrode 45a pixel 50a and the first common electrode 45a pixel 50b.

[0088] the Shape of the common electrode 45 of the pixel 50a and shape of the common electrode 45 pixel 50b are symmetric with respect to the boundaries between the pixel 50a and the pixel 50b or about a boundary between the second common electrode 45b pixel 50a and the second common electrode 45b pixel 50b. The shape of the pixel electrode 60 of the pixel 50a and shape of the pixel electrode 60 pixel 50b are also symmetric.

[0089] In each pixel 50a and the pixel 50b has a slot 47 formed between the first common electrode 45a and the second common electrode 45b. In addition, there is another slot 47 between the second common electrode 45b pixel 50a and the second common electrode 45b pixel 50b.

[0090] the First common electrode 45a pixel 50a is formed in such a way as to join the first common electrode 45a adjacent pixel on the upper side of the pixel 50a with a cutout located between them. The first common electrode 45a pixel 50b is formed in such a way as to join the first common electrode 45a adjacent pixel on the lower side of the pixel 50b with a cutout located between them. When the slot 47 of the common electrode 45 is thus provided between the pixel 50a and the pixel 50b, the electric field is not formed in this area, since the TFT substrate lying under the common electrode 45, also has a slot 48 formed between the pixel electrode 60 of the pixel 50a and the pixel of the first electrode 60 pixel 50b thus, to the liquid crystal maintained its original alignment.

[0091] Fig. 12 (a) is a chart showing the shape of the common electrode 45 in two adjacent pixels 50a and 50b of the second comparative sample liquid crystal display device. Fig. 12 (b) is a diagram showing the configuration of the pixel electrodes 60 in these two pixels 50a and 50b, the ratio of the location between the common electrode 45 and the pixel electrode 60 and the orientation of liquid crystal domains in the presence of applied voltage. Fig. 12 (c) is a chart clearly illustrates the orientation of liquid crystal domains.

[0092] In the second comparative example, as shown in Fig. 12 (a) and 12 (b), there are no slits formed between the common electrodes 45b two adjacent pixels 50a and 50b, and these two electrodes are combined with each other. Another part of the configuration of the second comparative example is the same as in embodiment 2.

[0093] when the second common electrodes 45b are connected to each other between the pixel 50a and the pixel 50b, as in the second comparative example, the liquid crystal between the second common electrodes 45b is governed by the slot 48 formed between the pixel electrodes 60 pixel 50a and pixel 50b so that the liquid crystal of the pixel 50a oriented in the direction of the azimuth of 90°, and liquid crystal-side pixel 50b oriented in the direction of the azimuth of 270°, as indicated by the Directors 53c of the liquid crystal in Fig. 12 (b) and 12 (c). However, the Directors 53b liquid crystal sections 62e and 62f branches extending over the second common electrode 45b pixel 50a, oriented in the direction of the azimuth 225° and the direction of the azimuth of 315°, respectively. The Directors 53b liquid crystal sections 62e and 62f branches extending over the second common electrode 45b pixel 50b, oriented in the azimuth direction of 45° and the direction of the azimuth of 135°, respectively. Therefore, the angle between the azimuth of Directors 53c of the liquid crystal, which is governed by the slot 48 between the two pixel electrodes 60, and the azimuth of Directors 53b of the liquid crystal, which is governed by sections 62e and 62f branches, θ₂is an obtuse angle, in particular equal to 135°. Thus, disruption of the alignment takes place in the border area, such as shown in Fig. 9. Under option exercise 2 prevents the occurrence of such violation alignment.

[0094] As shown in Fig. 10 (b), the pixel electrode 60 includes a section 61a trunk lines extending in the X-direction (part of the first trunk line), portions 61c and 61e trunk lines extending in the X direction (the main section of the third line), sections 61b and 6d trunk line, extending in the Y direction (the part of the second trunk line or the plot of the fourth trunk line), many sections 62a branches extending from section 61a trunk line or portion 61d main line in the direction of 45° (sections of the first branch), many sections 62b branches extending from section 61a trunk line or portion 61d main line in the direction of 135° (portions of the second branch), many sections 62c branches extending from section 61a trunk line or portion 61b main line in the direction of 225° (portions of the third branch), and many sections 62d branches, extending from section 61a trunk line or portion 61b main line in the direction of 315° (sections of the fourth branch).

[0095] the Pixel electrode 60 additionally includes many sections 62e branches extending from section 61c trunk line or portion 61b main line in the direction of 45° (plots fifth branch), many sections 62f branches extending from section 61c trunk line or portion 61b main line in the direction of 135° (plots sixth branch), many sections 62g branches extending from section 61e trunk line or portion 61d main line in the direction of 225° (sections seventh branch), and many of the plots 62h branches extending from the plot anaistalieu line or section 61d main line in the direction of 315° (sections eighth branch).

[0096] Between two adjacent parts of the sections 62a-62h branch has a slot extending in the same direction, and two adjacent electrode branches. Because the pixel electrode 60 a multi-domain configuration patterns 4D, consisting of eight regions 51a-51h formed in the pixel 50.

[0097] As shown in Fig. 11 (b), when considering from the Z-direction, the boundary between the first common electrode 45a and the second common electrode 45b and the slot 47 formed on the boundary, extending above the section 61a main line of the pixel electrode 60 and extend in the same direction as the direction of the stretch section 61a of the first trunk line. When considering the from direction Z many sections 62a branches, many sections 62b branches, many sections 62g branches and many of the plots 62h branches arranged in such a manner as to extend over the first common electrode 45. Many sections 62c branches, many sections 62d branches, many sections 62e branches and many sections 62f branches arranged in such a manner as to extend over the second common electrode 45b.

[0098] Fig. 13 (a) is a chart showing the distribution of the transmittance of the pixel 50 in the presence of applied voltage. Fig. 13 (b) and 13 (c) are diagrams for illustrating alignment of liquid crystal 52 in EB the m case. The applied voltage are the same as mentioned voltage in the description of Fig. 7 of options exercise 1. In Fig. 13 (b) 52a is a liquid crystal which is aligned near the slots 47 of the common electrode 45, and 52b is a liquid crystal which is aligned in the field, excluding the proximity of the slot 47. In Fig. 13 (c) 53a is the Director of the liquid crystal 52a and 53b is the Director of the liquid crystal 52b.

[0099] As can be seen from Fig. 13 (a), according to the liquid crystal device 100 of the display in General a homogeneous distribution of the luminosity is achieved in each domain in the presence of applied voltage. As can be seen from Fig. 13 (b) and 13 (c), Director 53a liquid crystal 52a is oriented in the direction of the slot 47 so as to be perpendicular to the extending direction of the slits 47. Director 53b liquid crystal 52b is oriented in the direction along the sections of the branches of the pixel electrode 60, i.e. in a direction that differs from the Director 53a 45°. The angular difference between the Director 53a and Director 53b, θ₁is 45°, which is relatively small differences, and these Directors intersect each other at an acute angle. Thus, disturbance of alignment of liquid crystal at the boundary between the liquid crystal 52a and liquid crystal 52b is unlikely to occur, thus, the can is to be obtained the desired alignment of the liquid crystal in a great area. The result is a relatively uniform distribution of luminance can be obtained around the pixel 50, as shown in Fig. 13 (a).

[0100] In the case when the mapping, the Director of the liquid crystal near the slits 47 moves from the azimuth indicated by 52a, to the azimuth indicated by 53b, so that was made by the dark line. In embodiment 2, there is only one slot between the first common electrode 45a and the second common electrode 45b in one pixel 50. Therefore, it is possible to display with high luminance with less dark region line than in the liquid crystal device 100 of the display of the option exercise 1.

[0101] the Result of the comparison of the luminosity of the display between the embodiment 2 and the comparative example is that the luminosity option exercise 2 was higher than the luminance of the comparative example by about 10%. An implementation option 2 and comparative example were also compared in relation to the origin of a lack of display in the display medium scale level halftone gradations. In the comparative example was discovered blurred display, whereas the blurred display was not detected in the liquid crystal device 100 of the display of the option exercise 2.

[0102](An implementation option 3)

Below Jew who kristallicheskoe device 100 display case for 3 according to the present invention is described with reference to Fig. 14 and Fig. 15. In the following description of a variant of implementation of the same elements as the elements of the embodiments 1 and 2, and elements that have the same functions as the functions of the embodiments 1 and 2, are indicated by the same numbers, positions, and descriptions of these elements and descriptions of the effects achieved by these elements are omitted. The liquid crystal device 100 of the display case for 3 involves the same elements as the elements of embodiments 1 and 2, except for the items, the differences will be illustrated or described below.

[0103] the Shape of the pixel electrode in the liquid crystal device 100 of the display case for 3 is the same as such from the option exercise 2, and therefore its detailed description is omitted in the present description.

[0104] Fig. 14 (a) shows the common electrodes 45 in two adjacent pixels 50a and 50b, which are adjacent along the direction Y. Fig. 14 (b) shows the ratio of the location between the common electrode 45 and the pixel electrodes 60 in these two pixels 50a and 50b. In pixels 50a and 50b common electrodes 45 and the pixel electrodes 60 have the same shape, and forms a common electrode 45 and the pixel electrodes 60 are not symmetric with respect to the boundaries between the pixels 50a and 50b, in contrast to the case for 2.

[0106] In each pixel 50a and the pixel 50b has a slot 47 formed between the first common electrode 45a and the second common electrode 45b. There is another slot 47 formed between the second common electrode 45b pixel 50a and the first common electrode 45a pixel 50b. When the slot 47 of the common electrode, thus, is provided between the pixel 50a and the pixel 50b, the electric field is not produced in this area, since the TFT substrate under common electrode also has a slot 48 formed between the pixel electrode 60 of the pixel 50a and the pixel electrode 60 pixel 50b, so that the liquid crystal maintained its original alignment.

[0107] As shown in Fig. 14 (b), when considering from the Z-direction boundary between the first common electrode 45a and the second about the current electrode 45b and the slot 47, formed at this boundary, extending above the section 61a main line of the pixel electrode 60 and extend in the same direction as the direction of the stretch section 61a of the first trunk line.

[0108] Fig. 15 (a) is a chart showing the distribution of the transmittance of the pixel 50 in the presence of applied voltage. Fig. 15 (b) is a diagram for illustrating alignment of liquid crystal 52 in this case. The applied voltage are the same as mentioned voltage in the description of Fig. 7 variants of implementation 1.

[0109] As can be seen from Fig. 15 (a), under option exercise 3 in General, a homogeneous distribution of the luminosity is achieved in each domain in the presence of applied voltage. As can be seen from Fig. 15 (b), the Director of the liquid crystal 52a is oriented in the direction of the slot 47 so as to be perpendicular to the extending direction of the slits 47. The Director of the liquid crystal 52b is oriented in the direction along the sections of the branches of the pixel electrode 60, i.e. in a direction that differs from the Director of the liquid crystal 52a at 45°. The angular difference between the Director of the liquid crystal 52a and Director of the liquid crystal 52b, θ₁is 45°, which is a small difference, and these Directors intersect each other at an acute angle. Therefore clicks the zoom, disturbance of alignment of liquid crystal at the boundary between the liquid crystal 52a and liquid crystal 52b are unlikely to occur, thus, can be obtained the desired alignment of the liquid crystal in a great area. The result is a relatively uniform distribution of luminance can be obtained around the pixel 50, as shown in Fig. 15 (a).

[0110] In one pixel 50 has only one slot between the first common electrode 45a and the second common electrode 45b. Therefore, it is possible to display with high luminance with less disturbance of alignment of liquid crystal than in the liquid crystal device 100 of the display case for 1.

[0111] In the liquid crystal device 100 of the display case for 3 second common electrode 45b pixel 50a arranged in such a way as to join the first common electrode 45a pixel 50b. Therefore, a more dark area caused by the first common electrode 45a, and a brighter area, caused due to the second common electrode 45b, separated from each other so that the appropriate areas are less visible.

[0112] In the liquid crystal device 100 of the display of the option exercise 2 the second common electrode 45b pixel 50a and the second common electrode 45b pixel 50b arranged in such a way to join others who g to each other, so more bright areas of these pixels or darker areas of these pixels are joined to each other. Accordingly, a bright region or a dark region, which appears along the boundary between the pixel 50a and the pixel 50b, is perceived as having double the width. However, in the liquid crystal device 100 of the display case for 3 second common electrode 45b pixel 50a arranged in such a way as to join the first common electrode 45a pixel 50b, so that more bright region and dark region joined to each other. Accordingly, a bright region or a dark region is perceived as having half the width of the width of the option exercise 2. Therefore, under option exercise 3, you may display, in which the difference in luminance between the bright region and a dark region is less noticeable than in embodiment 2.

[0113] Although not have any problems as long as the resolution is high enough, the difference in luminance between the bright region and a dark region can sometimes visually perceived as flash, when the pixel size is large, and the resolution is low. In the liquid crystal device 100 of the display case for 3 second common electrode 45b pixel 50a with amphawan thus, to join the first common electrode 45a pixel 50b. In the display medium scale level halftone gradations decreases the probability that the difference in luminance between the bright region and a dark region is visually perceived as a flash.

Industrial applicability

[0114] the Present invention is used to improve the display characteristics of the liquid crystal display device of the type of vertical alignment.

The reference list items

[0115]

10 is a TFT substrate

12 - TFT

14 - the scanning line

16 - signal-line

18 - line storage capacitor

20 - the opposite substrate

22 is a diagram of the excitation scan lines

23 is a diagram of the excitation signal lines

24 - management scheme

26, 27 - polarizer

28 is a block backlighting

30 is a liquid crystal layer

32 - transparent substrate

34 - insulating layer

36 - film alignment

42 is a transparent substrate

44 is a color filter

45 - the common electrode (counter-electrode)

45a - first common electrode

45b is the second common electrode

46 - film alignment

47, 48 - slot

50 - pixel

51a-51h - domain

52, 52a, 52b liquid crystal

53a, 53b, 53c - Director

60 - pixel electrode

61a-61e - section of the main line

62a-62h - site wet and

65 - storage capacitor of the counter-electrode

100 - LCD device display

110 - display area

111 - peripheral region

112a - first terminal

112b second terminal

160 - pixel electrode

161a, 161b - section of the main line

162a-162d - phase branch

1. The liquid crystal display device, comprising:
the TFT substrate which has a pixel electrode provided in a pixel;
the opposite substrate has a common electrode provided opposite to the pixel electrode; and
the liquid crystal layer of the vertical alignment, which is provided between the TFT substrate and the opposite substrate,
while the common electrode includes a first common electrode and the second common electrode, which is able to make excellent voltage from the voltage applied to the first common electrode,
the pixel electrode includes a part of the first trunk line, an area of the second main line, many parts of the first branches extending from part of the first trunk line or portion of the second trunk line in the first direction, many sections of the second branch extending from part of the first trunk line or portion of the second trunk line in the second direction, many of the plots a third of the th branch, extending from part of the first trunk line or portion of the second trunk line in the third direction, and many sections of the fourth branch, extending from part of the first trunk line or portion of the second trunk line in the fourth direction,
the first direction, the second direction, the third direction and the fourth direction are directions different from each other, and
when the pixel is viewed from the direction perpendicular to the plane of the TFT substrate, the boundary between the first common electrode and the second common electrode extends over part of the first trunk line of the pixel electrode and extends in the same direction as the direction of the stretch part of the first trunk line, with
the pixel electrode includes many sections of the fifth branch extending in the first direction, many sections of the sixth branch extending in the second direction, many sections of the seventh branch extending in the third direction, and many of the plots eighth branches extending in the fourth direction,
when voltage is applied between the pixel electrode and the common electrode, a lot of parts of the first branch, many sections of the second branch, many sections of the third branch and many of the plots Thu is rtoi branches form four domains, which have different orientation of the liquid crystal, and many sections of the fifth branch, many sections of the sixth branch, many sections of the seventh branch and many of the plots eighth branches form the four other domain, which have different orientation of the liquid crystal.

2. The liquid crystal display device according to claim 1, in which the first direction, the second direction, the third direction and the fourth direction different from the direction of the stretch part of the first trunk line at 45°, 135°, 225° and 315°, respectively.

3. The liquid crystal display device according to claim 1 or 2, in which
the slot is provided at the boundary between the first common electrode and the second common electrode, and
when voltage is applied between the pixel electrode and the common electrode, the azimuth of the Director orientation of the liquid crystal, which is determined by the corresponding one of the many parts of the first branch, many areas of the second branch, many areas of the third branch and many sections of the fourth branch, forms an acute angle with the azimuth of the Director orientation of the liquid crystal, which is determined by the first common electrode, the second common electrode and the slot.

4. The liquid crystal display device according to claim 3, in which the acute angle of approximately 45°.

5. Zhidkokristallicheskaya display according to claim 1, in which, when the pixel is viewed from the direction perpendicular to the substrate plane of the TFT, many parts of the first branch, many sections of the second branch, many sections of the seventh branch and many of the plots eighth branch are provided in such a manner as to extend over the first common electrode, and many of the plots of the third branch, many sections of the fourth branch, many sections of the fifth branch and many of the plots sixth branches are provided so as to extend over the second common electrode.

6. The liquid crystal display device according to claim 5, in which
in the second pixel common electrode includes the area of the first electrode and the area of the second electrode, between which is located the first common electrode, and
when the pixel is viewed from the direction perpendicular to the substrate plane of the TFT, many sections of the third branch and many sections of the fourth branch are provided in such a manner as to extend over the area of the first electrode, and many sections of the fifth branch and many of the plots sixth branches are provided so as to extend over the area of the second electrode.

7. The liquid crystal display device according to claim 6, in which
the pixel electrode includes a section of the third master of the school of the line and the plot of the fourth trunk line, and
many sections of the fifth branch, many sections of the sixth branch, many sections of the seventh branch and many of the plots eighth branches extend from the section of the third trunk line or portion of the fourth trunk line.

8. The liquid crystal display device according to claim 7, in which, when the pixel is viewed from the direction perpendicular to the plane of the TFT substrate, the boundary between the area of the first electrode of the second common electrode and the first common electrode extends over part of the first trunk line and extends in the same direction as the direction of the stretch part of the first trunk line, and the boundary between the area of the second electrode of the second common electrode and the first common electrode extends over the section of the third trunk line and extends in the same direction as the direction of the stretch section of the third trunk line.

9. The liquid crystal display device according to any one of claims 1, 2, 4, and 5, optionally containing another pixel that is adjacent to the said pixel, while
another pixel includes a portion of the second common electrode, and
when the pixel and the other pixel are viewed from the direction perpendicular to the plane of the TFT substrate, the second common electrode mentioned pixel and the second common electrode of another pixel is provided between the first common electrode above the pixel and the first common electrode of another pixel.

10. The liquid crystal display device according to claim 9, in which the shape of the pixel electrode of the above-mentioned pixel and the shape of the pixel electrode of another pixel are symmetrical with respect to the boundary line between the second common electrode of the above-mentioned pixel and the second common electrode of another pixel.

11. The liquid crystal display device according to claim 9, in which the slot is provided between the second common electrode of the above-mentioned pixel and the second common electrode of another pixel.

12. The liquid crystal display device according to any one of claims 1, 2, 4, or 5, optionally containing another pixel that is adjacent to the said pixel, while
another pixel includes a portion of the second common electrode, and
when the above-mentioned pixel and the other pixel are viewed from the direction perpendicular to the plane of the TFT substrate, the second common electrode of the above-mentioned pixel is provided between the first common electrode above the pixel and the first common electrode of another pixel, and the first common electrode of another pixel is provided between the second common electrode of the above-mentioned pixel and the second common electrode of another pixel.

13. The liquid crystal display device according to item 12, in which the slot is provided between the first common electrode of the above-mentioned pixel is the second common electrode of another pixel.

14. The liquid crystal display device according to any one of claims 1 to, 2, 4, 5, 6, 7, 8, 10, 11 and 13, additionally containing layer maintain alignment over the surface of at least one of the TFT substrate and the opposite substrate, which is located closer to the liquid crystal layer, and a layer of maintaining alignment configured to set the orientation of the liquid crystal in the absence of applied voltage,
in which layer of maintaining alignment made of polymer, which is obtained by photopolymerization photopolymerizable monomer contained in the liquid crystal layer, in the presence of applied voltage across the liquid crystal layer.

15. The liquid crystal display device according to any one of claims 1 to, 2, 4, 5, 6, 7, 8, 10, 11 and 13, additionally containing a display area, which includes a set of pixels and a peripheral area outside the display area, and
each of the first common electrode and the second common electrode is divided into many segments, linearly extending parallel to each other in the display area,
many segments of the first common electrode and the many segments of the second common electrode are provided alternately,
in the above-mentioned peripheral region many segments of the first common electrode connected to the us together and connected to a section of the first terminal, and many segments of the second common electrode are connected together and connected to a section of the second terminal, and
in the above-mentioned peripheral region generally symmetrically arranged conductive path of the first common electrode and the conductive path of the second common electrode.