Alignment treatment of liquid crystal display device
AssigneeFujitsu Limited
InventorsHidefumi Yoshida, Tsutomu Seino, Yasutoshi Tasaka
Life of this patent
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Abstract
The liquid crystal display device comprising a pair of substrates with alignment layers formed thereon, and a liquid crystal filled between the substrates. Each pixel has pixel display portions CA, CB and non-display portions DA, EA, DB, EB. The pixel display portions are treated for realizing alignment in a different manner from the non-display portions and the alignment of the pixel display portions is controlled by the alignment of the non-display portions. Moreover, the alignment treatment is executed by the irradiation with ultraviolet rays in an inclined direction.
Claims50
A liquid crystal display device comprising a pair of spaced and opposed substrates, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, a liquid crystal filled between said pair of substrates, and means for delimiting pixel display portions and non-display portions at least partly surrounding said pixel display portions, wherein said alignment layers are treated for realizing alignment so that the alignment of liquid crystal molecules in said pixel display portions is controlled by the alignment of liquid crystal molecules in said non-display portions.
A liquid crystal display device comprising a pair of spaced and opposed substrates, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, and a liquid crystal filled between said pair of substrates, wherein said alignment layer comprises an alignment layer having a vertically aligning property and realizes an alignment with a pretilt angle by irradiation with non-polarized ultraviolet rays in an inclined direction.
A liquid crystal display device comprising a pair of spaced and opposed substrates, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, and a liquid crystal filled between said pair of substrates, wherein said alignment layers are rubbed and are irradiated with ultraviolet rays in an inclined direction.
A liquid crystal display device comprising a pair of spaced and opposed substrates, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, and a liquid crystal filled between said pair of substrates, wherein said alignment layers realize an alignment with a pretilt angle of liquid crystal molecules neighboring said alignment layers by the irradiation of ultraviolet rays, and said substrates are made of a material that absorbs ultraviolet rays irradiated for realizing the alignment.
A liquid crystal display device comprising a pair of spaced and opposed substrates opposed to each other maintaining a distance, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, and a liquid crystal filled between said pair of substrates, wherein the alignment layer of at least one of said substrates is treated so that the alignment layer is divided into a plurality of parallel extending stripe regions and that the direction of alignment of the liquid crystal molecules in one region is opposite to the direction of alignment of the liquid crystal molecules in the neighboring region and the directions of alignment are parallel to the stripes.
A liquid crystal display device comprising a pair of spaced and opposed substrates, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, a liquid crystal filled between said pair of substrates, and a plurality of pixels, wherein each pixel has four different alignment regions, and said four alignment regions are formed so that the liquid crystal molecules therein are oriented in four directions at 90 degrees relative to each other.
A method for producing a liquid crystal display device comprising a pair spaced and opposed of substrates, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, and a liquid crystal filled between said pair of substrates, said method comprising the step of realizing an alignment with a pretilt angle, by irradiating the alignment layer exhibiting a vertically orienting property with non-polarized ultraviolet rays in an inclined direction.
A method for producing a liquid crystal display device comprising a pair of spaced and opposed substrates, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, and a liquid crystal filled between said pair of substrates, said method comprising the steps of rubbing the alignment layer and irradiating the alignment layer with ultraviolet rays in an inclined direction.
A method for producing a liquid crystal display device comprising a pair of spaced and opposed substrates, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, and a liquid crystal filled between said pair of substrates, said method comprising the step of realizing an alignment with a pretilt angle of liquid crystal molecules neighboring said alignment layers by irradiating the alignment layers with ultraviolet rays, said substrates being made of a material that absorbs ultraviolet rays that are irradiated, for realizing the alignment.
A liquid crystal display device comprising a pair of spaced and opposed substrates, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, and a liquid crystal filled between said pair of substrates, wherein said alignment layer is treated to realize an alignment with a pretilt angle by the irradiation of ultraviolet rays and formed so that one pixel has at least two regions having different threshold voltages.
A liquid crystal display device comprising a pair of spaced and opposed substrates, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, and a liquid crystal filled between said pair of substrates, wherein said alignment layer is formed so that one pixel has four regions divided by a crosswise boundary line in which the alignments of the liquid crystal are mutually different, and a shading layer is provided to cover the crosswise boundary line.
A quartered, vertically aligned liquid crystal display device comprising a pair of spaced and opposed substrates, an electrode and an alignment layer formed on one substrate, an electrode and an alignment layer formed on the other substrate, a liquid crystal filled between said pair of substrates, and polarizers arranged outside said pair of substrates, wherein said alignment layer is formed so that one pixel has four regions divided by a crosswise boundary line in which the alignments of the liquid crystal are mutually different, and said polarizers are arranged in a cross-Nicol arrangement and in the predetermined directions deviated in the range from 5 degrees to 20 degrees relative to the vertical direction, the horizontal direction, and the directions of diagonally 45 degrees with respect to the vertical direction and the horizontal direction.
Dependencies are inferred from the claim text.