摘要:
A method of aligning a liquid crystal includes a step of fixing on a hot plate and heating a liquid crystal cell in which a liquid crystal composed of a ferroelectric liquid crystal material sealed between electrode substrates respectively having alignment films having applied thereto a uniaxial alignment by rubbing. According to the described method, a pressure is applied to the liquid crystal cell by a roller, and a portion subjected to an application of pressure is moved by moving the roller. Further, the liquid crystal is heated within a temperature range between a phase transition temperature of SmA phase SmC* phase and a temperature 10° C. below the phase transition temperature, and the portion subjected to an application of pressure is moved in the same direction as the rubbing direction, thereby achieving the C2 orientation at higher yield. Within the described temperature range, by moving the portion in an opposite direction to the rubbing direction, a C2 orientation can be always achieved at high yield (almost 100%). As a result, the C2 orientation can be surely achieved in the liquid crystal display element with ease.
摘要:
An electrode substrate is placed on a stage heated at temperature in a range of from 50.degree. to 200.degree. C. in such a manner that an alignment film of the electrode substrate faces upwards. Thereafter, a rubbing treatment is applied by a roller having the rubbing cloth wound therearound by moving a stage while rubbing the surface of the alignment film by rotating the roller in a state where the electrode substrate is sufficiently heated. Here, as the alignment film is softened by the described heat treatment, the rubbing process is facilitated. This permits a uniform C2 orientation without defects to be achieved in smectic liquid crystals.
摘要:
An optical control device in accordance with the present invention includes a substrate (1) with light output layers (4); a substrate (2) with a light transmitting function, positioned opposite to the substrate (1); and a liquid crystal (3) sandwiched between the substrates (1) and (2), one of the substrates (1) and (2) having gate electrodes (9) for applying multiple scan signals, one of the substrates (1) and (2) having source electrodes for applying multiple signal electrodes, wherein the light output layers (4) are arranged in stripes and extend in the same direction as the gate electrodes (9).
摘要:
A manufacturing method includes a process of once heating a liquid crystal material to a temperature at which an isotropic phase appears therein and then cooling the liquid crystal material, the liquid crystal material being a ferroelectric liquid crystal or antiferroelectric liquid crystal, to be performed under an applied AC electric field which generates an electroclinic effect in a temperature range of from a temperature 20.degree. C. above a phase transition temperature at which a transition in phase occurs from a smectic A phase to a chiral smectic C phase to a temperature 20.degree. C. below the phase transition temperature.
摘要:
A diffractive spatial light modulator of the present invention includes a plurality of picture elements, each of the plurality of picture elements, comprises a plurality of first elongate parallel electrodes, a plurality of second elongate parallel electrodes interdigitated with the first electrodes and a third electrode, facing the first and second elongate parallel electrodes; and an address signal generator connected to the first and second elongate parallel electrodes and arranged to supply addressing signals for selectively switching each of the plurality of picture elements, picture element to any one of a non-diffractive state and a plurality of diffractive states of different diffraction efficiencies.
摘要:
A liquid crystal display device comprising a pair of electrodes formed on a pair of substrates, a pair of orientation films formed on the substrates to cover said electrodes, and a liquid crystal layer interposed between the substrates, wherein a plurality of pixels are provided between the facing sides of the pair of electrodes, and the liquid crystal layer comprises, in each pixel, regions with continuously or stepwise varying threshold values.
摘要:
A liquid crystal display element is provided with a first insulating substrate having spacers and an alignment layer that covers the entire surfaces of the spacers, and a second insulating substrate having at least an alignment layer. The liquid crystal display element is arranged so that the first and second insulating substrates are bonded to each other by allowing the alignment layer on the spacers of the first insulating substrate and the alignment layer on the second insulating substrate to soften and adhere to each other by applying a pressure under heat, and liquid crystal is injected into the gap in between.
摘要:
A method of driving an antiferroelectric liquid crystal device, comprising a pair of substrates, each providing electrodes, insulating films and orientation films in this order thereon, which is arranged so as to be opposed to each other and interposes an antiferroelectric liquid crystal composition between the orientation films, wherein electrode on either one of the substrates comprises a plurality of scanning electrodes and a plurality of signal electrodes in a matrix form and a thin film transistor at each point of intersection of the matrix, which comprises transmitting a signal from the scanning electrode to the thin film transistor to turn on and synchronistically applying a zero or positive selective voltage waveform corresponding to a desired display to the signal electrode of odd-numbered frames and a zero or negative selective voltage waveform corresponding to the desired display to the signal electrode of even-numbered frames.
摘要:
A ferroelectric liquid crystal mixture containing at least one chiral compound, having negative dielectric anisotropy and exhibiting a chiral smectic C phase includes at least one compound selected from the group consisting of a compound represented by the following general Formula I and a compound represented by the following general Formula II: ##STR1## where R.sup.1 and R.sup.2 are the same or different straight-chain or branched chain alkyl groups having 1 to 15 carbon atoms; X.sup.1 is a single bond, --O--, --COO--, or --OCO--; X.sup.2 is --O-- or --OCO--; Y is --COO-- or --CH.sub.2 O--; A and B are independently a group including a six membered ring which can be substituted by halogen, a cyano group, a lower alkoxy group, or a fluorine-containing alkyl group; and Z is a single bond, --COO--, or --OCO--.
摘要:
A ferroelectric liquid crystal composition including: at least one optically active compound of the formula (I): ##STR1## where R.sup.1 and R.sup.2 are, the same or different, a straight or branched chain alkyl group having 1 to 15 carbon atoms, k represents an integer of 0 or 1, and * represents an asymmetric carbon atom; andat least one compound selected from the group consisting of: compounds of the formula (II): ##STR2## where R.sup.3 and R.sup.4 are a straight or branched chain alkyl or alkoxy group having 1-15 carbon atoms, ##STR3## and ##STR4## each represents ##STR5## X represents --O--, --CO-- or a single bond, m and n are independently an integer of 0 or 1; compounds of the formula (III): ##STR6## where R.sup.5 and R.sup.6 are, the same or different, a straight or branched chain alkyl or alkoxy group having 1-15 carbon atoms, and p is an integer of 0 or 1;said ferroelectric liquid crystal composition exhibiting at least nematic phase, smectic A phase and smectic C phase.