A liquid-crystal spatial-temporal light modulator for optical information processing |
|
IPC classes for russian patent A liquid-crystal spatial-temporal light modulator for optical information processing (RU 2134440):
   
 Glass filter for welding / 2126548
 Bistable liquid-crystal units / 2253888
At least two stable or metastable ordering of liquid crystal are realized. Switching aid which causes the switching of liquid crystal material between switches has aid intended for optical illumination of the device. Device can provide the supply of linear polarized light for inducing torsion in liquid crystal. Alternatively ordering of liquid crystal can be switched by means of aid for supplying second energy, for example, electric field. In this case light serves to generate heat which helps to switching. One or both energy sources can be used locally for switching chosen areas or pixels. Energy levels on bistable substrate can be controlled by using oligomer adding (slippery surface).
 Apparatus and method for reducing optical blur / 2445665
Apparatus for compensating for camera movement includes a first liquid crystal cell, having a pair of parallel transparent plates, and a first voltage source connected to the first liquid crystal cell and capable of forming and changing a first voltage gradient between the plates of the first liquid crystal cell. The apparatus also includes a second liquid crystal cell, having a pair of parallel transparent plates arranged such that, each plate of the second liquid crystal cell is parallel to the plates of the first liquid crystal cell and is in optical connection with at least one light wave passing through the plates of the first liquid crystal cell, a second voltage source connected to the second liquid crystal cell and capable of forming and changing a second voltage gradient between surfaces of the second liquid crystal cell, and a motion detector connected to the voltage sources, for changing the slope of the voltage gradients in proportion to the movement.
 Liquid crystal display device / 2453879
Invention relates to display devices. One of two pixel electrodes has a first edge and the other has a second edge. The first edge (61a) and the second edge (61b) are non-uniformly parallel to each other in a direction perpendicular to a first direction (A); the protrusion on one or both the first (61a) and second (61b) edges enters a slit (62b), increases only in the direction from one predetermined region on one side of a bisector (C), which is common for the first (61a) and second (61b) edges, to another region on the other side of the bisector (C), wherein the region on one predetermined side and other region on the other side are regions of the first edge (61a) and second (61b) edge, and all protrusions pass through the slit and reach its maximum in the other region on the other side of the bisector.
 Liquid crystal display / 2457524
At least either a front substrate or a second substrate has regions corresponding to subpixels (15a, 15b, 15c) and is provided with arms (100a) for adjusting the position of the liquid crystal material. Scanning signal lines (32) and electrodes of the image elements (60) overlap each other through insulating material. The arms (100a) and scanning signal lines (32) also at least partially overlap each other.
 Composition for forming liquid crystal alignment film and liquid crystal display device / 2470965
Invention relates to a composition for forming a liquid crystal alignment film, said composition containing a material for forming a liquid crystal alignment film; 4,6-dimethyl-2-heptanon; diisobutyl ketone; and at least one of γ-butyrolactone and N-methyl-2-pyrrolidone. Described also is a liquid crystal display device containing a liquid crystal alignment film which is formed from said composition and is provided with alignment treatment by photoirradiation.
 Method of injecting droplet of levelling material and apparatus for realising said method / 2481607
Disclosed is a method and an apparatus for droplet injection, capable of preventing development of a linear defect which is the result of operation of a defective nozzle from multiple nozzles of a jet head which injects a disproportionate droplet volume, which manifests itself as a visual defect when the image is displayed on a liquid crystal panel. When adjacent streams of the droplets of levelling material, which are formed as a result of movements in the direction Y of the jet head, are merged to form a levelling film on a substrate, the value of displacement in the direction X of the jet head is set such that adjacent streams are formed by different nozzles.
 Liquid crystal display device / 2485563
Liquid crystal display device includes a liquid crystal display element which includes a pair of substrates and a liquid crystal layer which is sealed between the pair of substrates. The liquid crystal layer includes a p-type liquid crystal material which is homeotropically aligned relative the surfaces of the pair of substrates when no voltage is applied. One of the pair of substrates includes a comb-like electrode and a first alignment layer which is configured to adjust alignment of the p-type liquid crystal material. The other of the pair of substrates includes a second alignment layer which is configured to adjust alignment of the p-type liquid crystal material. The first alignment layer has cohesive energy of not more than 1.5×10-4 J/m2.
 Liquid crystal display panel and method for quality control of liquid crystal display panel / 2488151
Liquid crystal display panel has liquid crystal aligning films (18, 24) consisting of a polyimide that are formed on the front surface of a TFT substrate (10) and a colour filter CF substrate (20). The liquid crystal is tightly mounted between the TFT substrate (10) and the CF substrate (20). A metal film (40) is formed on the side of the TFT substrate (10), which can be optically identified on the side of the CF substrate (20), and can also operate as a plate which reflects infrared when measuring the degree of imidisation of the liquid crystal aligning film (18) covering the TFT substrate.
 Liquid crystal display device / 2492515
In an MVA liquid crystal display device, in at least one electrode (21) of each pixel, the portion, which is inserted between a first portion and a second portion adjacent to the first portion of the first electrode, has an extended portion (21aE1, 21bE1, 21aE2, 21bE2), which protrudes in the row direction. The first portion is a portion on which the edge of the first electrode overlaps with a recess (22a, 22b), or a portion on which the edge of the first electrode overlaps with the prolonged line of the recess (22a, 22b), closest to the edge. The second portion is a portion on which the edge of the first electrode overlaps with a second domain stabilisation structure (44a, 44b), or a portion on which the first electrode overlaps with the prolonged line of the domain stabilisation structure (44a, 44b), closest to the edge.
 Method of producing oriented liquid crystal layer / 2497167
Before depositing a liquid crystal layer, the porous structure of a layer of a metal oxide substrate is modified by depositing onto its surface a liquid isotropic solution of a dichroic substance, followed by evaporation of the solvent from said liquid solution to form on the surface and inside the porous layer of metal oxide a layer of a solid-state dichroic substance, thermally treating said porous layer, treating the obtained layer with a solvent without the dichroic substance to obtain a monomolecular layer of dichroic substance on the surface and inside the pores of the metal oxide. The layer of dichroic substance is then heated to evaporate residual solvent from the porous structure and the obtained monomolecular layer of dichroic substance is irradiated with activating optical radiation which is absorbed by the dichroic substance to provide the given orientation of anisotropic molecules in the monomolecular layer of dichroic substance. The substrate with the irradiated monomolecular layer of dichroic substance is further heated and liquid crystal material is then deposited on the obtained surface of the monomolecular layer of dichroic substance to form an oriented liquid crystal layer.
|
(57) Abstract: The invention relates to the field of optical instrument, in particular for the construction sitopaladi liquid crystal-spatial light modulators for input and processing of optical information, such as holography and intracavity readout image. The device is a multilayer system consisting of a film of polymeric photoconductor and a layer of nematic liquid crystal. For the orientation of the molecules of the LCD is a special orienting the floor. In the operation of this device it is proposed to use a supply voltage in the form of rectangular pulses of alternating polarity and pulse recording mode. Improved performance of the device, which is a necessary condition of its application in high-speed processing system for optical information made it possible to achieve an increase in the frequency cycle, the write - read 25 times. 2 Il., table 1. The invention relates to the field of optical instrument, in particular for the construction sitopaladi liquid crystal-spatial light modulators (LC-PWM) for input and processing of the Modulator is one of the main elements of the optical systems of registration, conversion and display of optical information, allowing you to perform operations in real time [1]. It is the recording of the image, creating the potential relief for the transmission of information on electro-optical layer, and the read image. Dynamic characteristics of LCD PWMs defined as the peculiarities of their structure and physico-chemical nature of the materials used (different types of photoconductors, different classes of liquid crystals, types of orienting coating), and the possibility of optimizing the parameters using specific operating conditions (using a laser to write and read pulse mode power supply and other aspects). Known design svetoprovodyaschego LCD PWMs selected as the analogue of [2] , containing a polymeric photoconductor as a photosensitive layer of a nematic liquid crystal as the modulating medium and silicon oxide as the orienting layer. Provide planar orientation of liquid crystal molecules. Polymer modulators have valuable technical parameters: high resolution, typical for molecular systems, high contrast grade sitopaladi LCD PVM [3]. However, the temporal characteristics of the polymer modulators worse than devices with other films. A disadvantage of the known design of the modulator is low performance. Known for the development of polymeric LCD PVM [2] has the following temporal parameters: the on - 200 MS, off-time of 700 MS under the condition of operation of the device at a constant voltage, and constant illumination blue-green part of the spectrum of the incandescent lamp. On the same device the authors of [4] by applying pulse recording using a laser interference resolvable, got the activation time is 15 MS. The structure worked at a constant voltage. A known design of polymer modulator, selected as a prototype containing polymeric photoconductor as a photosensitive layer of a nematic liquid crystal as the modulating medium and silicon oxide as an orienting layer [5]. The device worked in the combination of pulse write pulse unipolar supply voltage, and showed the following time parameters: on-time - 5 MS, off time is 120 MS. The disadvantage of this design of the modulator was a great time off presystemic. The same authors, applying the power structure of rectangular pulses of alternating polarity, got the time off 80 MS, which allowed to increase the cycle rate write-read from 0.2 Hz to 1 Hz (see the results presented in the table). The technical result of the invention is to further improve the performance of polymer LCD PWMs. This result is achieved in that in the known device, the construction of which includes a polymeric photoconductor and a nematic liquid crystal, use orientat based on thin films of amorphous carbon formed in the glow discharge plasma [6]. Replacement orienting layer of silicon oxide on amorphous carbon films changes the conditions for the mobility of charge carriers at the interface between media with different physico-chemical parameters and provides significantly better performance (see table). During operation of the proposed design LCD PWMs used voltage in the form of rectangular pulses of alternating polarity and pulse recording mode. Comparative analysis with the prototype shows that the claimed LCD PWM differs in that the orientation of liquid crystal molecules using orientat another is a series of inventions "novelty." The invention is illustrated by the drawing, which presents the design of the modulator (Fig. 1), and an optical measuring circuit characteristics (Fig. 2). We offer LCD PVM (Fig. 1) is a multi-layer system, consisting of a layer of nematic liquid crystal (1) with a thickness of 5 μm, and the film of polymeric photoconductor (2) with a thickness of 1 μm. The thickness of the LCD asked Teflon gaskets (6). The structure was between two glass substrates (4) with a diameter of 35 mm with transparent conductive electrodes (5) obtained by the method of laser deposition of indium oxide with the addition of oxide of tin. On the edge with a flat surface of the deposited amorphous carbon films (3) thickness of 500 obtained from the vapors of toluene in a glow discharge plasma. The initial orientation of the LCD planar, used S-effect. Measurement of the dynamic characteristics of the LCD PWMs was conducted by holographic technique [7] according to the scheme shown in Fig. 2, which presents a neodymium laser (1), the inverter of the second harmonic (2), the telescope (3), diaphragm (4), the rotary mirror (5), dividing mirror (6), prism (7), PWMs (8), HeNe laser (9), the lens (10), a photomultiplier (II). Modulator worked as follows. The second guy diffraction grating. The spatial frequency at which carried out the research, was 100 l/mm spot Diameter on Fotolia 5 mm, the energy density was maintained at 400 µw/cm2. To power the modulator was used pulsed voltage with the amplitude of the direct pulse 30 B and the amplitude of the pulse of reverse polarity of the 10th Century, the Duration of the pulse power was 30 MS, repetition rate 5 Hz. Pulsed power supply was synchronized with the pulses of laser generation. The delay between the pulse laser generation and the front edge of the pulse power was 50 μs. To read against the light used continuous linearly polarized radiation from a He-Ne laser (9) ( = 0.63). When reading and writing the orientation of the vector lattice and field readout radiation coincided with the orientation of the Director of the LCD molecules, i.e. performed the following vector combination of the Diffraction response was recorded in the first order diffraction in the focal plane of the lens (10), located behind the LCD PWMs (8). Registration was conducted using electronic photomultiplier (II). The activation time is defined by the rise time of the diffraction response of the level of 0,1 to 0,9 in the proposed device was anti-shudder performance 0,1, was 20 MS. Use as orientate thin films of amorphous carbon has reduced off-time modulator and significantly reduce the relaxation time, which improved the time the instrument is turned off 4 times. Improved performance of the device, which is a necessary condition of its application in high-speed processing systems optical data made it possible to achieve an increase in the frequency cycle, the write-read polymer modulators with 0.2 Hz [5] up to 5 Hz. The specified functional improvement of the device will allow to extend the scope of polymer light modulators. Sources of information:1. Vasiliev A. A. and other Spatial light modulators. - M.: Radio and communication. 1987, 320 S. 2. Mylnikov C. S. and other Spatio-temporal light modulation structure of the organic polymer photoconductor - liquid crystal. Tech. - 1985, T. 55, vol. 4, S. 749-751. 3. Slusar A. C., Mylnikov B. C. Spatio-temporal light modulation structure of the liquid crystal polymer photoconductor with conjugated bonds. Tech.-1991, I. 61, vol.11, S. 201-OS. 4. Mylnikov C. S. and other Effective reversible phase recording optical information structure of the organization is to N. A., Kamanina N. In., Onehow A. P. Features of work PWMs polymer fotokem when the pulse write pulse voltage. Technical physics letters. in 1992, T. 18, vol. 13, S. 27-30. 6. Konshina E. A., Baranov A. C., Yakovlev Century B. Vibrational spectra of carbon films obtained from acetylene plasma. ZhPS. - 1988, T. 48, N 6, S. 957-962. 7. Collier, P., Barnhart K., Lin. Optical holography. - M.: Mir, 1973, 686 C. A liquid-crystal spatial-temporal light modulators for optical processing of information containing polymeric photoconductor as a photosensitive layer of a nematic liquid crystal as a modulating environment and orienting layer, wherein the layer is made in the form of thin films of amorphous carbon.
|