Display

 

(57) Abstract:

The invention relates to image formation and can be used to display video information. The technical result is the possibility of successive scan lines of pixels in the image. The display is made of the matrix and consists of transistors, electrodes, deposited on a substrate, capacitors, shift registers, generator voltage and drivers. 5 C.p. f-crystals, 5 Il.

The invention relates generally to video displays and their associated excitation circuits and, more specifically, to circuits forming the columns of the LCD screens, which use a system of multiplexing to reduce the number of input lines of video data and which are also used capacitors data lines and columns of pixels that are pre-charged before they will be submitted video data signals in order under the influence of the input video signal a certain capacitor is discharged to an appropriate level to improve the display.

In matrix display devices video widely used multiple display elementaita electro-optical material. To control the flow of information signals from the display elements associated switching device. The display elements include a capacitor of a pixel driven by the transistor used as the switching device. One of the electrodes of the pixel is located on one side of the matrix display, and a common electrode for all pixels located on the opposite side of the matrix display. The transistor is typically a thin-film transistor (TFT), which is applied on a transparent substrate such as glass. The source of the switch transistor connected to the pixel electrode, deposited on the same side of the display matrix, which is a switching transistor. The drains of all the switching transistors of a given column are connected to the same column conductor that provides information signals. The gates of all the switching transistors of a given row are connected to a common capacitor line to which the signals of the select lines to switch all of the transistors of the youths in the status or condition incl. When scanning these capacitors row signal line selection all the transistors of a given row are included, and all rows are selected posledovati. When the switching transistors of a given row are selected by the select signal lines, the video signals applied to the electrodes of the switching transistors cause the capacitors of the pixels to be charged to a value corresponding to an information signal in the conductor columns. Thus, each pixel with its electrodes placed on opposite sides of the display acts as a capacitor. When the signal on this line stops blowing and the charges in the capacitors of the pixel is stored until the next cycle when the row is selected again by the select signal lines, and they will be accumulated new voltage levels. Thus, charges stored in the capacitors of the pixels on the matrix display is formed image.

It should be noted that although the term "video" is usually applied to the use of television signals, in this case it covers images related not only to a television pictures or images. This display can be used in electronic games using endocrinological display reproducing moving objects, etc.

The image resolution depends on the number of its formiruemoi matrix has 1024 columns and 768 rows. Such a display requires 1792 output excitation rows and columns.

It is clear that the greater the number of pixels in the matrix, the harder it is to connect to the display the required number of conductors of the excitation of rows and columns. Therefore, we developed several devices in an attempt to reduce the number of required connections between the external to the matrix circuits and circuits are applied to the matrix. In U.S. patent N 4922240 serves to connect the electronic circuit of the scan with the substrate of the display, using the same technology that is used for the manufacture drivers pixels for the liquid crystal elements. Further, it proposes to reduce the number of connections to the matrix, using the configuration of the switch or switch based on the same configuration matrix, which is used in the active display to select individual pixels. Use as a television display is not described.

In U.S. patent N 5151689 a device displaying the video data with a number of signal lines of the columns, reduced through the use of switching device that connects at least two of the display element in each lad with the signal line and consistently splenic elements, connected to the signal line, sequentially in time. Thus, the total number of signal lines can be reduced to a number equal to the number of display elements in a row or even more.

In U.S. patent N 4931787 proposed to reduce the number of address conductors, distributing the image elements in groups consisting of at least two picture elements, the picture elements of each group are addressed by the same conductors of the switching signal and data. Switching transistors connected to the picture elements of each group are shaped with respective different voltage levels of the switching signal. Thus, by using the switching signal received from the respective excitation means, and in which the voltage levels are changed in a predetermined order in a selected range of amplitudes, it is possible to selectively control the switching transistors connected to the picture elements of each group. One conductor can have several different voltage levels and to manage the same number of pixels.

In addition to these well-known examples of almost all commercially to the Lea require one outer conductor for each column and for each row. As mentioned above, the driver's direct line interface for monochrome computer display, 768 x 1024 requires 1792 conductors. As mentioned above, such a huge number of conductors in the excitation circuit of the display represents the most complicated problem, which is exacerbated with increased resolution and complexity of the displays. The two main ways to resolve this problem is to reduce the required input conductors and integration items prices excitation, which include shift registers, latches and appreciate excitation directly to the substrate of the display. This can reduce costs and increase reliability by eliminating the need for mounting integrated circuits on a single substrate.

The object of the present invention is a display of the type which has first and second opposite substrates separated by a layer of electro-optic material containing the Y lines input of video signals applied to the first substrate, the X groups of Y switching element on lines deposited on a first substrate, a common electrode for all the switching elements on the second substrate, the line excitation lines, connected with Z lines switching element activated for daiku and United with the X groups of Y switching element and Y lines of the input video data, characterized in that at least the first substrate is made of glass, and in that it includes a thin-film transistor constituting each demultiplexer element (86 ... 92) for posledovatelna and alternate supply video data to the Y lines of the input video data directly to each of the X groups of Y switching element for forming a video image, the switching transistor and the corresponding capacitive element (capacitor) of the image forming each of the Y switching element, the first control line for each of the X groups demultiplexes, deposited on the first substrate and respectively connected with each even from demultiplexing elements for connecting the even-numbered lines of video data input from the even of the switching transistors in the selected one of the Z lines in each of the X groups of switching elements as the sequential activation of each of the rows, and the second control line for each of the X groups demultiplexes deposited on the first substrate and connected to each of odd demultiplexers elements for connecting the odd lines of the input video data with an odd of the switching transistors in the selected one of the Z lines in each of the X groups per the expressions.

The present invention relates to a new excitation circuit and data to the new circuit, which can be applied directly to the substrate of the display. This allows you to exclude the cost of peripheral integrated circuits and hybrid Assembly required to connect non-scanning liquid crystal displays for active matrix to the matrix. Thus, according to the present invention, using as an example a portable color television receiver with display size 384 X 240 pixels, the demultiplexer circuit and pre-charge is performed on the thin-film transistor (TFT) in the display to transfer video and display interface directly with the video source. The video signals from a source located outside of the display are multiplexed organization and served on the display of the input conductors of the data, using one-sixth of the specified line time interval. As already mentioned, this is only an example and other displays with a different number of input conductors, you can use different attitude. The control signals allow the first unit circuits demuxing to transfer the video signals on the first grueling lines or columns, the second group of signals is transferred to the second group of the inner conductors of the data during the second one-sixth of the specified line time interval. This is due to the inclusion of control signals of the second demultiplexers chain. This operation continues sequentially for demultiplexing circuits 1-6 in the example, or 1-N in other displays with a different number of columns.

Thus, the entire line of video information is transferred to the internal data line by demuxing the video signals on the X groups of Y switching elements in a selected one of Z rows for the selected input time t. The advantage of this new scheme demuxing is that it reduces the number of external connection conductors 384 in this example to 79, including the 64 input lines and data lines necessary control and clock signals and to simplify the Assembly of the TFT liquid crystal display with connectors with a small step. The result is lower production costs.

In addition to the schema demuxing for each data line is pre-charged. These schemes are used for odnoo pre-selected voltage level so that that during the time allocated to input information signal time interval t is only required to discharge the data line and the pixel capacitor to a pre-selected level. For each data line uses only two transistors, one for demuxing of the input signal, and the second is to pre-charge the data lines. Therefore, the matrix can be easily performed with a high percentage of accepted items.

Thus, the main feature of the present invention is the manufacture of liquid crystal display having the demultiplexer circuit and the circuit for pre-charging is marked on the display using thin film transistors.

Another important characteristic of the present invention is to provide a new circuit driver data for self-scanning device TFT - liquid crystal display having a transistor for pre-charging for each data line, which pre-charges all the data line and the capacitors of the pixels in the selected line to a predetermined voltage level so that during the time interval allocated to the input information signal is required to discharge the data line and Conde one feature of the present invention is the use of only one demultiplexers transistor and one transistor for pre-charging for each data line, thereby providing a high percentage of the yield of products in the manufacture.

These and other features of the present invention are described in more detail in the following description with reference to the accompanying drawings, in which identical elements are denoted by identical positions and where:

Fig. 1 is a fundamental block diagram of a new chain of excitation system and generate the data for self-scanning zhidkokristallicheskogo video display thin-film transistor;

Fig. 2 is a detailed diagram of a matrix and located on her chains scan data;

Fig. 3 - shape pulses and synchronization signals according to the present invention;

Fig. 4 is a graph of charge of the capacitor, illustrating that the capacitor discharges faster than it charges;

Fig. 5 is a graph illustrating the advantages of the supply voltage V+and V-smaller than the full voltage preliminary charge, which consists in saving time.

Fig. 1 is a fundamental block diagram of the new display system 10, which includes a display device 14 and are "not on the glass control circuit 12, which are made separately from the display 14 and is connected to vozbuzhdenijah. 1, a typical day may consist of 20000 or more display elements. It is clear that when displaying TV images with the increasing number of display elements increases the clarity of the image. For portable miniature television receiver matrix may consist of 384 columns and 240 rows. In this case you need more than 92000 display elements or pixels. For large matrices, this number increases. The transistors used for the excitation of pixels are usually thin-film transistor (TFT), deposited on a substrate, for example glass. The display elements include electrodes, deposited on glass and elements of the common electrode is applied to the opposite substrate. Opposite (opposite) of the substrate separated electro-optical material. On the substrate 14, which may be made of glass, chain 16 generate the data in columns excite line of columns 24 video signals. The chain 25 excitation of the string may be of any type known in this field and sequentially activates the pixels in each selected row, and rows 1 through 240 are excited sequentially.

In external control circuits 12, which is separated from the display 14, the capacitors 50 Kwan is about served from circuit 58 on the capacitors 50 quantization consistently with the data in the shift registers 49. Clock signals and the signals of vertical and horizontal synchronization comes from the logic control circuit 60. The generator 62 high voltage delivers the necessary high voltage. Output capacitors 50 quantization served on 64 output amplifier 52. Thus, if one row of pixels contains 384 display element, these 384 display elements located on the substrate 14, 64 connected to the line input 13, which enter the data in multiplexed mode on 64 bits at a time. 64 output line 13 is connected to the column conductors 24 through the data drivers of the column, as will be described below. On line 18 from the control circuit 12 six pairs of lines of the video signal selection lead to the excitation circuits data columns 16, located on the glass 14 for demuxing 64 output signals and consistent feed them on X(6) different groups Y (64) columns 24 in a selected one of the Z (240) lines on the glass 14. The signal circuit 25 excitation line, the clock and the lines of force pass from the control circuit 12 through line 21 to a circuit 25 excitation line, as will be shown below. The chain 25 excitation of the string may be any known in this field. The signal for pre-charging is served by line 48 to the cops 19, 36 and 42 in line 1, as shown in Fig. 1. Then the circuit for pre-charging circuit 16 excitation data columns sequentially sends a signal that energizes each data line and each capacitor 22 of the pixel in the first group to a predetermined voltage. After the information signals will be fed from the line of columns 24, the capacitors to discharge to a level that depends on the level of information of the signal applied to the information line 24. The circuit for pre-charging is used to provide discharge of the capacitor 22 so that they discharged much faster than charged, as shown in Fig. 4. As can be seen from Fig. 4, the capacitor is charged from 0 to the value indicated by the position 23, for X units of time. However, the discharge of the capacitor is the maximum amount of charge up to the same level only takes Y time units, which is much less than X. Next, you need time t to charge the capacitor to its full potential and less time Z for a full charge. Thus, the discharge time is much less charge time, allowing you to discharge the capacitors of data lines to a desired voltage level during the time interval allocated for info the Ohm, sequential zapisywanie each row, all the capacitors of the pixels in all groups in the selected row are simultaneously charged to full capacity and sequentially discharged in X groups. Therefore, on a substrate 14 are bonded X groups of Y switching transistors (18, 36, 42) in the Z lines. If the display is, for example, has a resolution of x pixels, it may be six groups of 64 switching element 240 lines deposited on a substrate. The following describes such an example.

In Fig. 2 shows a more detailed diagram of the substrate 14. There is also external to the substrate, the control circuit column 12 gives the signals on lines 13 on the substrate 14. The driver circuit line 25, known in the field and containing thin-film transistors, operates in accordance with the control signals on lines 21 in Fig. 1 from the control circuit 12, and sequentially selects the rows in a known manner. Line marked in Fig. 2 1-Z and shown only the first and last lines. The rest of the strings are identical. It should also be noted that in Fig. 2 shows the X groups of Y switching element. The switching element includes a transistor and an associated capacitor of the pixel. In the first lnasty group consists of 64 items such if X=6, and the total number of columns is equal to 384. The gates of transistors 78, 80, 82 and 84, which may be thin-film transistors deposited on a glass substrate 14, is connected through conductor 1 line circuit 25 of the excitation line. The capacitor of the pixel or display element (94, 96, 98 and 100) is connected with the respective sources of transistors 78, 80, 82 and 84. The electrode 28 is a second plate of the capacitor of the pixel and is a segment of the common electrode located on the opposite substrate of the display 14.

The circuit 116 preliminary charge generates an output signal on line 118 which is connected to the gates of all 384 transistors for pre-charging, each of which is connected with one of the 384 lines of the columns on the substrate 14. The sample transistor for pre-charging is shown in group 1, which is indicated by the position 66. The drain of transistor 120 of the preliminary charge is connected to a voltage source V and its source connected to the internal column information line D1. All the odd lines of the columns are connected to them such a transistor. For example, in Fig. 2, the drains of the transistors 120 and 424 connected to the source 128 voltage V+. The drains of the transistors 122 and 126 for the even-numbered lines of the columns soy is she 13, contain the video signals, which are served in parallel on each of the X groups. For this example, where the number of columns taken for 384 will be six groups (X=6) 64 columns (Y= 64), which are multiplexed input signals from the input lines 13 in demultipleksirovanie. The excitation circuit of the demultiplexer 102 generates pulses of phase one and phase two, which are fed to the gates demultiplexers transistors 108, 110-112 and/14 in group one in block 66. Similar signals on a pair of lines 130 and a pair of lines 132 from the demultiplexer 102 excite groups five and six (the X-1 and X), denoted by positions 68 and 70. Thus, the excitation circuit of the demultiplexer 102 first transmits signals to the 64 data lines 64 columns in the first group 72 switching element 86, 88-90 and 92, then signals for the 64 lines in each group with 2 to X. Thus, the 64 lines of data entry will be drawn from the following five groups of switching elements, including group shows 74 and 76. Each of rows 1 to Z is also selected sequentially and in this example, Z is equal to 240 lines. The row is selected after 64 input information lines sequentially connected to each of the six groups 1-X.

The advantage of this new scheme demuxing is to reduce the number of external connections up to 384 79 and a significant simplification of the Assembly and packaging of liquid crystal displays, thin-film transistor with a small step on the connectors. The result is reduced production costs. In addition to the schema demuxing using such transistors as 106, 110, 112 and 114, for simultaneous charging related data lines and the switching elements to a voltage or V+or V-using such transistors as 120, 122 - 124, and 126, therefore, to discharge the data line to a pre-selected level of the video signal is required only during the time interval allocated to the input information signal. Each column line is connected one such transistor for pre-charging. In the shown embodiment, IsoBuster preliminary charge. Therefore, this circuit is easy to manufacture and allows to obtain a high product yield.

In Fig. 2 in conjunction with Fig. 3 shows that the line (a) in Fig. 3 represents a time interval of scanning lines is equal to approximately 63 microseconds for the display matrix size h elements, stacked with the television system NTSC standard. Resources time line is 8 microseconds - off of the previous line, 6 microseconds on a preliminary charge of scanning line data, 42 microseconds - to transfer video data in demultipleksirovanie from the external video source on the X groups of data lines of the display and 7 microseconds per reaction pixels. These resources are shown on line (C) in Fig. 3. Thus, from line (d) in Fig. 3 shows that during the first 8 microseconds reserved for disabling the previous scanned line of In-1discharges with a pre-selected level, for example, 20 volts, to level off -5 V, as shown by line (e) in Fig. 3. This leads to the exclusion of all capacitors of the pixels in line In-1so they kept the charge corresponding to the image data. After 8 microseconds time off signal for pre-charging for the line 124 and 126 are activated so that these 6 microseconds odd internal data line D1D3- D383charged to the level of V+and even internal data line D2D4- D384charged to the level of V-. For example, tier V+approximately equal to 5 V, and the level of V-is 0 C. However, it should be understood that mostly level V+should be slightly less than 5 to increase the speed of the device. As shown in Fig. 5, in a time of 6 microseconds allocated on a preliminary charge, the internal data line and the pixel capacitor can be charged to a value of V+which is less than the maximum voltage of 5 volts. Then, within 7 microseconds allocated to the charge of the capacitors of the pixels to the level of the input data requires the same time to V2went with V+to the maximum voltage of the data, and V1discharged to a minimum voltage of the data. In both cases, the charging time for V2and discharge for V1you can reduce or optimize. The charging time of the data line and the pixel capacitor was reduced to the time required to obtain V2and, if necessary, a predetermined voltage of the data line is less than the m, the voltage level of V+can be optimized so that the difference between the charging time of the internal data line and associated capacitor of the pixel to the maximum level of the input video signal, for example 5 V, and the discharge time of the internal data line and associated capacitor of the pixel to the minimum level of the input video signal, would be minimal. Thus on a preliminary charge takes less time, because the capacitors of the pixels are not charged to the full level 5 for the period allocated on a preliminary charge. The same analysis is also valid for the level of negative voltage V-127served on the even-numbered transistors for pre-charging 122-126. After all the internal data line and the capacitors of the pixels in a given row, for example, 94, 36-98 and 100 pre-charged to the level of V+or V-input video signals (red, blue, green) and their complementary signals are on the line of input data D1-D64. In this case, D1D3-D63are video signals of positive polarity, and D2D4-D64are signals with opposite polarity. These voltage videosin and 106 to 7 microseconds rise to the level of 25 volts and 30 volts, accordingly, as shown by a line (g) in Fig. 3. In each of the other X groups of input lines, in this case X=6), line 13 connected with them, on 7 microseconds receive the video data, as shown by the lines (q), (h) and (i) in Fig. 3. The data line are divided into two groups - even and odd - because this system uses the inversion of the polarity of the voltage data. The polarity of voltage data change between the two fields of a television frame. The last 7 of 63 microseconds microsecond time interval used for the reaction of the pixels of the last group X.

Demultiplexers transistors 108, 110, 112 and 114 are such options that allow internal data lines D1-D64can discharge up to 15 mV levels of the input color video signals for the selected time interval - in this example 7 microseconds. This operation is sequentially repeated for each circuit demuxing 66, 68 and 70, or for all six groups.

At the beginning of the scan operation n-th line, the switching transistors of the pixels in row n is already fully included. So after disabling the scanning line n-1 pixels in row n is already pre-charged. If the first unit transistors of the pixels in columns D1- D64in line n will have a discharge of pixels 49 microseconds, the second set of transistors of the pixels in columns D65- D128in line n will be approximately 41 microsecond to discharge. The third block will be approximately 33 microseconds, and so on, the Last block of the transistors of the pixels will have essentially only 9 microseconds per discharge pixels. If each of the six groups of transistors of the pixels to allocate 7 microseconds and to allocate the remaining 7 microseconds for the installation of pixels, as shown in Fig. 3 (d), each transistor gets enough time to discharge. Short time to discharge, could cause a voltage error 03D10V for the sixth block of pixels. In order to reduce 03D10V and obtain permission in 256 shades of gray, it is desirable to allocate additional 7 microseconds for the installation of pixels. In this case, the sixth group of the capacitors of the pixels will be allocated 14 microseconds up to the level of the video signal. After off-line n-1, as shown by line (e) is the line n and the voltage supplied to this, the line has a maximum value of 20 volts, as shown by line (I).

It should be understood that the coefficient demultiplexer siroute or to find a compromise depending on the purpose of the product. For example, for images with high resolution and/or high quality, you can use a reduced coefficient demuxing in order on the substrate 14 could spend more signal conductors than 64. You can also reduce the great Majesty of the input conductors for video equipment, which are not so high requirements in respect of the resolution or performance.

In addition, in this application the data line and the pixel is pre-charged to higher required voltage levels due to the fact that N-channel transistors are used for data transfer and the data line or the pixel discharged during the input video signal, because it is much easier and faster discharge than charge for receiving the voltage accurately corresponding to the signal.

Further, f1,eand f1,o(lines 104 and 106) can be combined into one line that supplies control signals to all the gates multiplexing transistors 108, 110, 112 and 114 in group I. the Association signals f1,eand f1,oyou can perform when the voltage on the gate is not a problem and characteristics demultiplexers transistors 108, 110, 112 and 114 is high enough, Thu is the control line can be combined with other couples lines demuxing, such as 130 and 132, for the remaining five groups, including groups 68 and 70 in Fig. 2. In this case, the number of lines of the gate control multiplexing can be reduced by half.

Thus, the present invention discloses a liquid crystal display, active matrix, in which the number of conductors required input data is reduced, and the excitation circuit of rows and columns integrated directly on the substrate of the display. This leads to a reduction of production costs and increase reliability by eliminating the operation of mounting integrated circuits on a single substrate.

In the example above, use color portable TV receiver with a resolution of K pixels. The horizontal line is 384 pixels. The demultiplexer circuit and pre-charge is performed on the thin-film transistor in the display to transfer video data and to connect the display directly to the video source. The video signals from a source located outside of the display are arranged to come to the 64 data lines of the display simultaneously for one-sixth of the time interval allocated for the scan line. Twelve control signals, the high transfer the input video signal into six groups of 64 internal line of the display. After completion of the transfer of video data on the first 84 internal data line D1-D64the following 64 video signal is transferred to the internal data line D65- D128. This is achieved by including a second set of control signals from the circuit demuxing. This operation continues sequentially for all six circuits demuxing. Complete line of video information is transmitted to internal data line 42 microseconds selected on the data entry time.

1. Display with first and second opposite substrates separated by a layer of electro-optic material containing the first substrate, which is applied to the Y lines of the input video signal, the X groups of Y switching element in the row, the row conductors, connected in the excitation circuit of the line with Z lines switching element for activating the switching elements in each row, the excitation circuit of the demultiplexer generates pulses phase, which serves on the X groups of Y demultiplexers transistors connected with the X groups of Y switching element and Y lines of the input video signal, a common electrode for all switching element located on the second substrate, otlichayushiesya, applied on a glass substrate, and are designed for sequential and alternate supply video signals to the Y lines of the input video signal directly to each of the X groups of Y switching element for forming a video image, with each switching element, the transistor corresponds to the pixel capacitor, which has a first electrode deposited on the first substrate and the second electrode, in common with the second substrate, each first electrode is connected with the corresponding one of the transistors of the switching element, in addition, the first substrate is marked Y elements for pre-charging is performed on the transistors, each of which is connected with a corresponding one of the Y lines of video signals between demultiplexers transistors and the respective switching elements for pre-charging lines of video signals and image elements to supply video signals to the line input video signals.

2. The display on p. 1, characterized in that it is applied on a glass substrate transistors are thin film transistors.

3. The display on p. 1, wherein X = 6 groups, Y = 64, Z = 240.

4. The display on p. 1, wherein teto transistors items pre-charge have the source, the drain and the gate, while the source of each of these transistors is connected to one of the associated Y lines of the input video signal, and the voltage source connected to the drain of each of the transistors for pre-charging, the element of the preliminary charge generates an output signal on the corresponding signal line connected to a gate of each of the transistors to turn on the transistor conductivity and pre-charge circuits, and associated capacitors of the pixel in the selected row in the selected X groups of switching elements to forward data along the Y lines of the input video signals intended for to use the data line discharging each capacitor of the pixel to a voltage level of the input video signal intended for the formation of a displayed video image.

6. The display according to any one of paragraphs.1 to 5, characterized in that it is made of liquid crystal.

 

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FIELD: control of liquid-crystalline color displays.

SUBSTANCE: in accordance to the invention, video signal of same size may be derived with lesser number of clock impulses. Device and method realize a block for controlling clock impulses, which provides clock impulses for operation of each module, interface block which receives 16-bit data for each clock impulse in accordance with control signal of block for controlling clock impulses, a pair of 18-bit RGB buffers, which preserve data transferred through interface block, graphic buffer, which preserves graphic data from a pair of RGB buffers, switch block, which preserves data signals from a pair of RGB buffers, in graphic buffer, and digital-analog converter which transforms digital R/G/B data, preserved in graphic buffer, to analog signal for output.

EFFECT: increased efficiency of data transmission due to reduced processing time of central processor unit.

2 cl, 9 dwg

FIELD: physics, optics.

SUBSTANCE: invention is related to the field of optics and facilities of information displaying, and may be used for highlight of colour liquid-crystal (LC) displays and creation of LC displays that do not contain matrix of colour filters. In matrix LC display and its highlight system, which contains the following serially installed components: one or more light sources, light-conducting layer, array of light-outputting elements, fiber-optic plate installed between array of light-outputting elements and LC display, foresaid fiber-optic plate represents matrix of elements made with the possibility of light source radiation spectrum transformation into radiation with wave length that corresponds to colour formed by subpixel of liquid crystal display, at that size and location of mentioned elements correspond to size and location of liquid crystal display subpixels, at that the first line of matrix of elements that transform wave length, is installed opposite to the first line of liquid crystal display, the second line of matrix of elements that transform wave length, is located opposite to the second matrix of liquid crystal display, n line of matrix of elements that transform wave length is installed opposite to n line of liquid crystal display matrix, at that every element of foresaid fiber-optic plate contains at least one photon-crystalline fiber, which transforms wave length, at that mentioned fibers are tightly packed and completely fill area of mentioned element, at that photon-crystalline fiber includes set of fibers with hollow core that are installed lengthwise around hollow or solid wave conductor area, at that fibers with hollow core are installed so that create two-dimensional photon crystal with photon prohibited zone, at that mentioned hollow or solid wave conducting area is formed to transmit signal with frequency that lies mostly inside photon prohibited area, so that light source radiation spectrum is transformed into radiation with length of wave that corresponds to colour formed by subpixel of liquid crystal display.

EFFECT: creation of LC display highlight system with improved efficiency of light source radiation application and application of radiation source of only one type, and also creation of LC display with high transmission, in which suggested highlight system is used.

9 cl, 10 dwg

FIELD: physics.

SUBSTANCE: according to the method, electrical energy is supplied to the LCD, electrical signal is transmitted to the LCD for updating displayed information, ambient temperature in the vicinity of the LCD is measured, and energy and update information transmitted to the LCD are regulated based on ambient temperature. Field device (10) includes LCD (110), electronic control module (120), made with possibility of transmitting energy signals and connection to the LCD (110), and a temperature sensor (112), connected to the electronic control module (120). The electronic control module (120) is made with possibility of measuring ambient temperature close to the LCD (110), and control energy and connection to the LCD (110), based on temperature of the LCD (110).

EFFECT: increased reliability of operation at low temperature.

20 cl, 6 dwg

FIELD: physics.

SUBSTANCE: pixel control device (120) for the liquid-crystal display (LCD) panel (1) includes first and second transistors (Ta, Tb) and first and second storage capacitors (CstA, CstB). The second transistor (Tb) has a gate electrode (G) which is connected to the gate electrode (G) of the first transistor (Ta), and a drain electrode (D) which is connected to the drain electrode (D) of the first transistor (Ta). The first storage capacitor (CstA) has a terminal (104) which is connected to the source electrode (S) of the first transistor (Ta). The second storage capacitor (CstB) has a first terminal (107) which is connected to the source electrode (S) of the second transistor (Tb), and a second terminal (103) which is connected to the gate electrode (G) of the first transistor (Ta) of a pixel control device (120) in another pixel row of the LCD panel (1).

EFFECT: reduced colour shift, wider viewing angle, simple design.

23 cl, 12 dwg

FIELD: physics.

SUBSTANCE: light source controller, which controls backlight, provides processing which is successively performed for all units SA-a (1) - (16) in the SA-a correction region. Processing includes installation of the SA-a region for four regions SA-a - SA-d as a correction region and providing light emission in unit SA-a (1), which is a unit in the SA-a correction region, and successive emission of light in units SA-b (n) - SA-d (n), which lie in three other regions SA-b - SA-d, except the SA-a correction region, and positions of which, in these regions, correspond to the SA-a (n) unit. The light source controller then repeats similar operations for the remaining three regions SA-b - SA-d, used as correction regions.

EFFECT: possibility of correcting brightness or colour grade of emission light with high accuracy and with low expenses.

9 cl, 17 dwg

FIELD: physics.

SUBSTANCE: liquid-crystal display device recognises every 12 video signal lines (SL1-SLn) in the order of their arrangement as a group and drives the video signal lines with time division in the group in the horizontal scanning period. The order of driving video signal lines in the group for a frame with an even number differs from the order for a frame with an odd number. For each line, the video signal line with an even number is driven first in one frame, and the video signal line with an odd number is driven first in another. The first and last driven video signal lines are specified so that they correspond to blue colour. The number of push-ups, under the effect of which video signal lines fall, is limited to two for the frame with an even number and zero for the frame with an odd number in addition to change of their order, so that the arising of vertical strips at low temperatures is prevented. Additionally, only video signal lines corresponding to the blue colour are specified as having insufficient charge, so that viewers find it difficult to recognise deterioration of image quality due to insufficient charge.

EFFECT: prevention of arising of vertical strips in display devices which perform driving with time division of video signal lines.

13 cl, 9 dwg

FIELD: information technology.

SUBSTANCE: invention is a system for image post-compensation processing. A modified process (2521) for storing brightness/image compensation is aware of the image post-compensation process (2523) and can allow for its influence on an input image (2520). The modified process (2521) for storing brightness/image compensation can generate and apply to the input image (2520) a process which will compensate for the level of backlight selected for the image, and which will compensate for the effect of the image post-compensation process (2523).

EFFECT: compensation for drop in image quality during operation of a display in low power mode.

20 cl, 120 dwg

FIELD: information technologies.

SUBSTANCE: mobile electronic device includes a capacitance sensor, having an electrode layer with non-etched sections and etched sections, and having isolation areas formed on etched areas, and a segmented optical gate arranged on the side of the capacitance sensor, besides, the optical gate includes a liquid crystal layer inserted between an upper absorbing polariser and a lower absorbing polariser, and includes an element of reflective property increase, arranged between the liquid crystal layer and the lower absorbing layer. The reflective property of the element of reflective property increase is selected to reduce the ratio of the reflective property on non-etched areas to the reflective property on etched areas to make the user interface appearance substantially uniform in off condition.

EFFECT: providing the user with various configurations of keyboard buttons required to the user depending on the used mode of the device operation.

20 cl, 4 dwg

FIELD: physics.

SUBSTANCE: presence of change of view in a video sequence is detected. The value of the backlight brightness level of the current frame in said video sequence is determined based on image characteristics in said current frame. Said value of backlight brightness level is filtered by a first filter when change of view is defined as close to said current frame; and said value of backlight brightness level is filtered by a second filter when change of view is not defined as close to said current frame.

EFFECT: filtering the backlight brightness level of a display using an adaptive filter based on presence of change of view near the current frame.

20 cl, 98 dwg

FIELD: information technology.

SUBSTANCE: histogram calculation process calculates an image histogram. A distortion module uses the histogram value and distortion weight in order to determine distortion characteristics for various backlight illumination levels, and then selects the backlight illumination level which lowers or minimises the calculated distortion. After selecting the backlight illumination level, the backlight signal is filtered by a time filter in a filtration module. A Y-amplification projecting module is used to determine the image compensation process. This compensation process involves application of the curve of the tonal range to the brightness channel of the image.

EFFECT: amplification of an image formed by displays which use light radiators, owing to adjustment of pixel brightness and setup of the light source of the display to different levels in accordance with image characteristics.

20 cl, 107 dwg

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