With Particular Pretilt Angle From The Alignment Layer Patents (Class 349/134)
  • Patent number: 11604384
    Abstract: According to one embodiment, a liquid crystal element includes a transparent substrate including a first main surface, a plurality of structures disposed on the first main surface and arranged along one direction, an alignment film disposed on a surface of each of the structures and a liquid crystal layer containing a cholesteric liquid crystal and in contact with the alignment film, and the helical axis of the cholesteric liquid crystal is inclined with respect to the first main surface, each of the plurality of structures includes a first surface inclined with respect to the first main surface, in the plurality of structures, the first surfaces are parallel to each other, and the alignment film is interposed between the first surface and the liquid crystal layer.
    Type: Grant
    Filed: March 16, 2022
    Date of Patent: March 14, 2023
    Assignee: Japan Display Inc.
    Inventors: Junji Kobashi, Shinichiro Oka, Yasushi Tomioka, Koichi Igeta
  • Patent number: 10692461
    Abstract: The present disclosure provides a display device, a manufacturing method thereof, a driving method thereof and a counter substrate. The display device includes a liquid crystal cell, at least one flicker detector and a signal processing apparatus. The at least one flicker detector is disposed in a non-display region within the liquid crystal cell and configured to detect light intensity in the liquid crystal cell; and the signal processing apparatus is configured to adjust a magnitude of a common voltage for driving the liquid crystal cell according to a signal strength outputted from the flicker detector, to reduce a flicker value of the display device.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: June 23, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xiaoliang Cheng, Ke Dai, Chunyang Nie, Wenwu Lu, Xueqin Wei, Bingbing Yan, Hailong Li
  • Patent number: 10520771
    Abstract: A liquid crystal device includes an elemental substrate provided with a silicon oxide alignment layer on the front surface side thereof. Silanol groups of the alignment layer are bound to an organic silane polymer layer by silane coupling treatment. The silane coupling treatment also forms an organic silane polymer layer on the rear surface side of the elemental substrate. This organic silane polymer layer is a layer having a higher hydrophilicity than the organic silane polymer layer. A light-transmitting plate bonded to the rear surface side of elemental substrate with an adhesive layer is thus unlikely to separate.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: December 31, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Yoshio Taniguchi
  • Patent number: 10114253
    Abstract: The present disclosure provides a display panel, a display device, their manufacturing methods, and a substrate curving device. The method for manufacturing the display panel includes steps of: providing two substrates for forming the display panel; arranging the two substrates opposite to each other, curving the two substrates at a predetermined curvature, and directly dripping liquid crystals into a space between the two curved substrates, so as to make the liquid crystals to have a twist angle matching with the predetermined curvature of the two curved substrates; and after the dripping, arranging the two substrates opposite to each other to form a cell. According to the present disclosure, the liquid crystals are dripped into between the two curved substrates, the then the two curved substrates are arranged opposite to each other to form the display panel.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: October 30, 2018
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Youngman Kwon, Kuhyun Park, Yunbok Lee, Dongling Sun, Zhengwei Zhu, Wenhao Zhang, Sheng Wang
  • Patent number: 10088720
    Abstract: A thin film transistor (TFT) array substrate, including: a gate line and a data line, which are formed on a substrate, and a sub-pixel unit defined by intersecting of the gate line and the data line, wherein, the sub-pixel unit comprises a thin film transistor device, a first pixel electrode layer and a second pixel electrode layer; the first pixel electrode layer is insulated from the second pixel electrode layer; the second pixel electrode layer is located over the first pixel electrode layer, and the pattern of strip-like pixel electrodes of the second pixel electrode layer overlap up-and-down with the pattern of the first pixel electrode layer; and the strip-like pixel electrodes make a tilt angle with an initial orientation of liquid crystals, and a gate line is parallel to the strip-like pixel electrodes close to the gate line.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: October 2, 2018
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Rongge Sun
  • Patent number: 9933661
    Abstract: A liquid crystal apparatus includes a substrate that includes a convex portion on one surface, a liquid crystal layer that is arranged on the one surface side of the substrate, an inorganic alignment film that is arranged between the substrate and the liquid crystal layer, and has a column structure inclined to the one surface of the substrate, and an organic alignment film, in which the inorganic alignment film has a concave portion of which a thickness becomes thin in at least a portion of the column structure, at a position to be in contact with a portion that does not face an inclined direction side of the column structure in a side surface of the convex portion, and the organic alignment film is arranged in the concave portion.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: April 3, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Koichi Takemura, Shohei Yoshida, Toshiyuki Noguchi
  • Patent number: 9800753
    Abstract: Performing optical mark recognition (OMR) scanning includes receiving a first substrate to be scanned, the first substrate having one or more colors visible to a human eye and bearing user-made marks; scanning the first substrate using a plurality of colors of light emitted from a light sensor to simultaneously generate both (a) first image data representing a visual appearance of the first substrate, and (b) first OMR data corresponding to respective locations of the user-made marks on the first substrate; transmitting from a first page buffer at least a portion of the first image data and/or at least a portion of the first OMR data; receiving a second substrate to be scanned; and during the transmitting from the first page buffer, simultaneously scanning the second substrate.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: October 24, 2017
    Assignee: Scantron Corporation
    Inventors: Joe Zajac, Jonathan Ort
  • Patent number: 9709857
    Abstract: A display device may include a substrate having a first substrate portion, a second substrate portion, and a third substrate portion positioned between the first substrate portion and the second substrate portion. The display device may further include a first roof layer and a second roof layer formed of the same material, spaced from each other, and respectively overlapping the first substrate portion and the second substrate portion. The display device may further include a transistor overlapping the third substrate portion. The display device may further include a liquid crystal set. The display device may further include a common electrode portion positioned between the first substrate portion and the liquid crystal set. The display device may further include a sub-pixel electrode positioned between the liquid crystal set and the first roof layer and electrically connected to the transistor.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: July 18, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seok-Joon Hong, Seong Gyu Kwon, Ji Seong Yang
  • Patent number: 9218763
    Abstract: A display device including a display panel having an image display area and a non-display area, a driver circuit unit to feed an image formation driving signal to the display panel and a controller is provided. The display panel includes a transparent board including a light shielding portion formed along an edge thereof to define the non-display area and a light transmitting portion formed at a part of the light shielding portion, a rear board placed to face the transparent board and a logo module placed on a rear surface of the transparent board to overlap the light transmitting portion to outwardly display a logo through the light transmitting portion. At least a part of the driver circuit unit is formed on one of the transparent board and the rear board so as to overlap the light shielding portion. The display device may minimize a lower bezel region.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: December 22, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Deung Hwangbo, Junki Kim
  • Patent number: 9217900
    Abstract: A manufacturing method of a liquid crystal display includes: forming an etch target layer including a conductive material on a first substrate; forming a first mask layer on the etch target layer; forming a block copolymer coating layer including a plurality of polymers on the first mask layer; processing the block copolymer coating layer to form a block copolymer pattern layer including first and second polymer blocks; removing one of the first or second polymer blocks to form a second mask pattern layer; etching the first mask layer by using the second mask pattern layer as an etching mask to form a first mask pattern layer; and etching the etch target layer by using the first mask pattern layer as an etching mask to form a first electrode. The first electrode includes a plurality of the first minute patterns extending in a predetermined direction and having a polarization function.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: December 22, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyang-Shik Kong, Sung Hoon Yang, Se Hwan Yu, Yong Hwan Shin, Su Mi Lee, Shin Il Choi
  • Patent number: 9110339
    Abstract: A pixel structure adapted to a vertical alignment (VA) mode liquid crystal display (LCD) device is provided. The pixel structure includes a plurality of comb-shaped electrodes and a plurality of pixel transistors. The comb-shaped electrodes are interdigitated in a pairwise manner and thereby constitute at least one comb-shaped electrode pair. The pixel transistors respectively are electrically coupled to the comb-shaped electrodes. The comb-shaped electrodes respectively are electrically coupled to receive a plurality of data voltages through the respective pixel transistors and whereby at least a part of the data voltages are different, and the data voltages received by the two comb-shaped electrodes of each comb-shaped electrode pair are different from each other. Moreover, a VA mode LCD device using the pixel structure and a pixel driving method adapted thereto are also provided.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: August 18, 2015
    Assignee: AU OPTRONICS CORP.
    Inventors: Yu-Sheng Huang, Ya-Ling Hsu, Hung-Lung Hou
  • Patent number: 9070884
    Abstract: The present invention provides organic light emitting devices having a combined emission from at least two emissive materials, a fluorescent blue emissive material and a phosphorescent emissive material. The device may further comprise additional fluorescent or phosphorescent emissive materials. In preferred embodiments, the invention provides OLEDs having three different emissive materials—a red emissive material, a green emissive material and a blue emissive material. The invention provides a device architecture which is optimized for efficiency and lifetime by using a combination of fluorescent and phosphorescent emitters. Further, in preferred embodiments the device architecture provides a high color-stability of the light emission over a wide range of currents or luminances.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: June 30, 2015
    Assignee: Universal Display Corporation
    Inventors: Yeh-Jiun Tung, Michael S. Weaver, Michael Hack, James Esler
  • Patent number: 9063384
    Abstract: A wall electrode IPS mode LCD has stabilized domain boundary. Signal and scanning lines extend in first and second directions, respectively, surrounding a pixel. A first wall structure has a first portion intersecting the first direction at a first angle, a second portion in the first direction, and a third portion intersecting the first direction at a second angle. The second portion has a first projection in the second direction. The second wall structure has a fourth portion intersecting the first direction at the first angle, a fifth portion in the first direction, and a sixth portion intersecting the first direction at the second angle. The fifth portion has a second projection in the second direction. A distance between the first projection and the fifth portion is shorter than a distance between the first wall structure except the first projection and the second wall structure.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: June 23, 2015
    Assignee: Japan Display Inc.
    Inventors: Osamu Itou, Takato Hiratsuka
  • Patent number: 8937698
    Abstract: First alignment is performed by forming an alignment layer that includes a photopolymerizable monomer or oligomer on a substrate and the like, introducing liquid crystal, and bringing the liquid crystal into contact with the alignment layer including the photopolymerizable monomer or oligomer. The liquid crystal is then subjected to secondary alignment by photopolymerizing the photopolymerizable monomer or oligomer including the alignment layer to form an alignment regulator in a state in which an electric field is applied to the liquid crystal to change the alignment of the liquid crystal.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: January 20, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jae-Hoon Kim
  • Patent number: 8879009
    Abstract: An optical filter for a stereoscopic display device separating left-view and right-view images includes a substrate, one or more alignment layers formed on the substrate in a predetermined pattern and each having partition wall parts on edges of each alignment layer, and one or more liquid crystal layers formed on the alignment layers, wherein a height of each of the partition wall parts is two to ten times greater than a thickness of a center part of each alignment layer.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: November 4, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Hyun-Sik Kim, Jung-Ho Park
  • Patent number: 8854580
    Abstract: A method of producing spatially varying pretilt angles across a liquid crystal cell coats a substrate with a polyimide alignment layer and a layer of photoalignment material on top of the polyimide layer. An applied beam with variable light dosage spatial or temporal profiles is then used to achieve a corresponding pretilt angle distribution.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: October 7, 2014
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Hoi Sing Kwok, Yuet Wing Li, Man Chun Tseng
  • Patent number: 8848147
    Abstract: First alignment is performed by forming an alignment layer that includes a photopolymerizable monomer or oligomer on a substrate and the like, introducing liquid crystal, and bringing the liquid crystal into contact with the alignment layer including the photopolymerizable monomer or oligomer. The liquid crystal is then subjected to secondary alignment by photopolymerizing the photopolymerizable monomer or oligomer including the alignment layer to form an alignment regulator in a state in which an electric field is applied to the liquid crystal to change the alignment of the liquid crystal.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: September 30, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jae-Hoon Kim
  • Patent number: 8797499
    Abstract: A liquid crystal lens or beam steering device is made by programming alignment surfaces of the LC cell walls using a programming field to align the alignment surface molecules before fixing them. By setting the desired pre-tilt, the lens can operate in the absence of the control field, and power consumption by the control field can be reduced.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: August 5, 2014
    Assignee: Lensvector Inc.
    Inventor: Tigran Galstian
  • Patent number: 8704988
    Abstract: A liquid crystal display device includes a first substrate, a pixel electrode and a counter electrode, an insulation film, and a first orientation film formed over the pixel electrode and the counter electrode on the first substrate, the first orientation film being responsive to a radiated polarized light to obtain an initial orientation direction. A second substrate is opposed to the first substrate, a second orientation film is formed over the second substrate, and a liquid crystal is sealed between the first and second substrates. The first and second orientation films are made of polyimide, the liquid crystal has negative dielectric anisotropy, and the liquid crystal display device is normally in a black mode. An angle formed between the electric field and the initial orientation direction of the first orientation film is in a range of greater than 0° to 45°.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: April 22, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 8531636
    Abstract: A liquid crystal display includes a first substrate having a first electrode on one surface side, a second substrate having second electrode on one surface side and placed opposite to the first substrate. A liquid crystal layer having a pretilt angle of 89.7° or more and less than 90° is disposed between the first and second electrodes. The first and second electrodes respectively form a pixel in opposing areas. The first electrode includes rectangularly shaped openings disposed with regularity in the pixel in a planar view. The openings include first and second openings with longitudinal directions respectively facing first and second directions, the second direction different from the first direction. The angle formed by the longitudinal directions of the first and second openings, and an alignment direction of liquid crystal molecules at the substantial center of the liquid crystal layer is 0° or more and less than 90°.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: September 10, 2013
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Yoshihisa Iwamoto, Kunihiko Katano
  • Patent number: 8427613
    Abstract: A liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrates, and an orientation film formed on the first substrate. The orientation film has two orientation regions in a pixel, and the orientation regions are formed by polarized light.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: April 23, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 8416379
    Abstract: A liquid crystal display device including a pair of substrates in a spaced relationship with one another. A pair of alignment films are provided, one alignment film being formed on each substrate such that the alignment films face one another. A liquid crystal layer, including plural liquid crystals, is inserted between the pair of alignment films, wherein the alignment films impart a given pre-tilt angle to the liquid crystals. The alignment films are composed of a material containing at least two types of polymers having a prescribed initial alignment and different alignment variation rates in response to ultraviolet ray irradiation. The pre-tilt angle being adjusted, without rubbing the alignment films, through ultraviolet exposure of the alignment films.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: April 9, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hidefumi Yoshida, Yasutoshi Tasaka, Takashi Sasabayashi, Yohei Nakanishi, Kenji Okamoto
  • Publication number: 20120320323
    Abstract: In a liquid crystal display, a pretilt value provided by an upper alignment layer or a lower alignment layer is gradually changed in one domain, such that liquid crystal molecules have various arrangements in which azimuth angles of aligned liquid crystal molecules are gradually changed.
    Type: Application
    Filed: October 20, 2011
    Publication date: December 20, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyoung Tae KIM, Kyoung Ju SHIN, Jun Woo LEE, Suk Hoon KANG, Baek Kyun JEON, Young-Gu KIM
  • Patent number: 8279386
    Abstract: This object aims to provide a liquid crystal display panel with good in viewing angle characteristic, and capable of carrying out a high brightness display. The liquid crystal display device includes a first substrate having at least one pixel unit and at least one first orienting structure, a second substrate disposed opposite to the first substrate, and a liquid crystal layer sealed between the first and second substrates and having negative dielectric anisotropy. The pixel unit includes a pixel electrode that is located in the display area, while the first orienting structure is located outside the display area. In addition, the liquid crystal layer contains an optical rotation material, and some of the liquid crystal molecules in the liquid crystal layer are inclined toward the internal part or the external part of the pixel unit by the first orienting structure.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: October 2, 2012
    Assignee: Chimei Innolux Corporation
    Inventors: Cheng-Chung Peng, Yuren Shen, Shih-Hung Fa, Jin-Jei Wu
  • Patent number: 8253901
    Abstract: A display device includes a light supplying unit generating light and a liquid crystal panel having a liquid crystal layer including liquid crystal molecules aligned substantially parallel to the plane of a pair of substrates by anti-parallel rubbing when no voltage is applied to the panel. Bias voltage corresponding to maximum gray level of the panel is determined between threshold voltage of the liquid crystal layer and 40% of maximum voltage.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: August 28, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hee-Wook Do, Seung-Hoo Yoo, Hoon Kim, Hyun-Cheol Moon, Hye-Ran You
  • Patent number: 8242991
    Abstract: A liquid crystal display apparatus includes a plurality of pixels arranged in a matrix shape and a drive circuit for actively driving the plurality of pixels. Each of the pixels has a laminated structure including a pixel electrode, a first alignment film, a liquid crystal layer, a second alignment film, and a counter electrode. The liquid crystal layer includes a liquid crystal molecule having a vertical alignment property. The first alignment film and the second alignment film are inorganic alignment films formed by obliquely depositing an inorganic material. The drive circuit has a first calculation section for extracting a first positional information, a second calculation section for extracting a second positional information, a third calculation for calculating a third positional information, and a fourth calculation section for calculating a third video signal.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: August 14, 2012
    Assignee: Sony Corporation
    Inventors: Eiji Kato, Naoki Ohashi
  • Patent number: 8237908
    Abstract: A method of manufacturing a liquid crystal display includes; forming a mother substrate assembly by disposing a liquid crystal mixture layer having liquid crystals and a light curable alignment supplement between a first mother substrate and a second mother substrate of a liquid crystal display, and disposing a light curable sealant surrounding the liquid crystal mixture layer, pre-tilting liquid crystal molecules of the liquid crystal mixture layer by applying a voltage to the first mother substrate and the second mother substrate, and simultaneously hardening the alignment supplement and the sealant by radiating light to the mother substrate assembly while applying the voltage to the first mother substrate and the second mother substrate.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: August 7, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min-Goo Seok, Jae-Jin Lyu, Seung-Beom Park, Jong-Ho Son, Ji-Won Sohn, Myeong-Ha Kye, Hoon Kim, Jun-Hee Na
  • Patent number: 8194215
    Abstract: A liquid crystal device comprises a first alignment surface which induces a high pretilt greater than 45° but less than 90°; a typical value is 85°. The pretilt has a component parallel to the surface pointing in a predetermined direction. A second alignment surface induces a low pretilt which is less than 45° but greater than 0°; a typical pretilt is 5°. The low pretilt has a component parallel to the second surface which also points in the predetermined direction. A layer of crystal material is disposed in between the first and second surfaces. A novel liquid crystal mode is thus provided and is referred to as the “splay-twist mode”. Such a device may be used in a switchable public/private display.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: June 5, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Nathan James Smith, Benjamin John Broughton
  • Patent number: 8164725
    Abstract: A liquid crystal device includes: a circuit substrate; a counter substrate disposed so as to be opposed to the circuit substrate; a liquid crystal layer interposed between the circuit substrate and the counter substrate, the liquid crystal layer showing vertical alignment as an initial alignment state; a first alignment layer manufactured on a side of the counter substrate using a coating process, the side facing the liquid crystal layer, the first alignment layer having a vertical alignment function; and a second alignment layer manufactured on a side of the circuit substrate using a vacuum process, the side facing the liquid crystal layer, the second alignment layer generating a pretilt.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: April 24, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Nobukazu Nagae, Takeshi Miyashita
  • Patent number: 8139189
    Abstract: A main object of the present invention is to provide a liquid crystal display, using a ferroelectric liquid crystal exhibiting mono-stability, which makes it possible to control the direction of the spontaneous polarization of the ferroelectric liquid crystal. The liquid crystal display is produced by holding a ferroelectric liquid crystal between: an oblique vapor deposition-alignment layer of a first alignment treatment substrate, in which a first electrode layer and the oblique vapor deposition-alignment layer are formed in this order on a first substrate; and a fixed liquid crystal layer of a second alignment treatment substrate, in which a second electrode layer, an alignment layer for reactive liquid crystal and the fixed liquid crystal layer are laminated in this order on the second substrate.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: March 20, 2012
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Naoko Sawatari, Masato Okabe
  • Patent number: 8068201
    Abstract: A vertical orientation liquid crystal display in which orientation control by oblique electric field is performed stably and lowering in light transmission rate of the liquid crystal display is suppressed without increasing the number of manufacturing steps significantly. In the vertical orientation liquid crystal display, a plurality of regions having different inclination orientations of liquid crystal molecule are formed by applying a voltage to each pixel electrode having an aperture or a recessed portion. The liquid crystal display comprises a switching element connected electrically with the pixel electrode, and an auxiliary electrode formed to overlap the aperture or the recessed portion in the pixel electrode wherein the auxiliary electrode is formed of the same film as that of the semiconductor layer in the switching element.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: November 29, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuki Kawashima, Yasutoshi Tasaka
  • Patent number: 8031310
    Abstract: Disclosed herein is a liquid crystal display including substrates, a liquid crystal, an orientation layer, and electrodes. The orientation layer includes a base layer having a principal surface provided with a plurality of grooves in parallel, and a coating film covering the principal surface. The coating film has a horizontally orienting ability to orient in parallel the molecular major axes of the liquid crystal molecules in the condition where no voltage is impressed on the principal surface. The grooves each extend along a predetermined direction, and are arrayed repeatedly at a given pitch along the direction orthogonal to the predetermined direction.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: October 4, 2011
    Assignee: Sony Corporation
    Inventors: Masaya Tamaki, Hidemasa Yamaguchi, Hironao Tanaka, Motoharu Nishida
  • Patent number: 7995178
    Abstract: In a liquid-crystal-display panel (1) for displaying a barcode that is formed with bars having various widths arranged in parallel at various intervals by an electro-optic effect of liquid crystal, a direction of a transmissive axis (P1) of a polarizing film disposed on a side on which light from a barcode reader is irradiated is set to coincides with a direction in which the light is polarized. Moreover, the direction of transmissive axis (P1) of the polarizing film is set to be parallel or substantially parallel to a short side or a long side of each of the bars forming the barcode. A direction (M) of a long axis of a liquid crystal molecule (LCM) in a first ferroelectric state or in a second ferroelectric state is set to be parallel or substantially parallel to the direction of transmissive axis (P1) of the polarizing film, or set to form an angel of 45 degrees or substantially 45 degrees therebetween.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: August 9, 2011
    Assignee: Citizen Holdings Co., Ltd.
    Inventors: Akira Suguro, Shinya Kondoh
  • Patent number: 7965359
    Abstract: Self-compensating, quasi-homeotropic liquid crystal devices (100, 200, 300, 400) overcome the contrast reducing effects of smaller pretilt angles. The devices exhibit extremely high contrast ratio but at the same time suppress fringe field-induced disclination lines in high pixel density and small pixel size quasi-homeotropic displays. The surface pretilt (520, 540) and cell twist (570) angles are set at values that, in combination, contribute to establishing a cuspate singularity in the contrast ratio for normally incident light in response to a drive signal switching the liquid crystal device to the OFF director field state that provides nearly 0% optical efficiency. The OFF director field state corresponds to a subthreshold drive level that provides for the liquid crystal device self-compensation for in plane optical retardation.
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: June 21, 2011
    Assignee: Cuspate, LLC
    Inventors: Terry J. Scheffer, Jiuzhi Xue
  • Patent number: 7872719
    Abstract: A liquid crystal display including a pair of substrates having a predetermined cell gap and arranged opposite to each other, vertical alignment films formed between the pair of substrates, a liquid crystal layer sealed between the vertical alignment films and having a negative dielectric anisotropy, and a cured material provided in the liquid crystal layer and including a liquid crystal skeleton, which is tilted with respect to the substrate at a first angle, for changing tilt angles of liquid crystal molecules for each of predetermined regions. The vertical alignment films have an alignment control direction that defines a second angle with respect to said substrates, wherein the second angle is different from the first angle.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: January 18, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazutaka Hanaoka, Seiji Tanuma, Yohei Nakanishi, Kazuya Ueda, Shingo Kataoka, Takahiro Sasaki, Arihiro Takeda, Hideaki Tsuda, Takatoshi Mayama, Yuichi Inoue, Norio Sugiura
  • Patent number: 7864280
    Abstract: It is to provide a liquid crystal display device capable of readily obtaining bend alignment across an entire liquid crystal display panel of the liquid crystal display device, with obtaining brightness while obtaining a high speed responsiveness, a feature of an OCB mode, as well as without increasing a load on an activating driver. The liquid crystal display device is arranged such that: a liquid crystal molecule in a liquid crystal layer sandwiched between a pair of substrates facing each other has a pretilt angle of not less 18° and not more than 36°; a product ?nd of a refractive index anisotropy ?n and a thickness d of the liquid crystal layer is not less than 850 nm and not more than 1170 nm; and a lateral electric field generating structure for applying an electric field parallel to the substrates and bend-aligning the liquid crystal molecules is provided in a region corresponding to a pixel.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: January 4, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kazutaka Hanaoka
  • Patent number: 7787085
    Abstract: An optical alignment method which develops a pretilt angle by batch plane exposure without tilting a substrate. This optical alignment method provides liquid crystal aligning capability to the surface of a polymer film by exposing the surface of the polymer film through a slit exposure mask while the surface of the polymer film and the slit exposure mask are moved relative to each other substantially at a fixed rate. Alternatively, liquid crystal aligning capability is provided to the surface of the polymer film by exposing the surface of the polymer film through an optical exposure pattern while the optical exposure pattern having a plurality of lines with a certain width at certain intervals is formed on the surface of the polymer film continuously.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: August 31, 2010
    Assignees: JSR Corporation, National Institute of Advanced Industrial Science and Technology
    Inventors: Masayuki Kimura, Hiroshi Yokoyama
  • Patent number: 7718234
    Abstract: A liquid crystal display is provided which is capable of reducing the occurrence of defective display due to variations in the initial alignment direction of a liquid crystal alignment control film in a liquid crystal display of an IPS scheme, realizing the stable liquid crystal alignment, providing excellent mass productivity, and having high image quality with a higher contrast ratio. The liquid crystal display has a liquid crystal layer disposed between a pair of substrates, at least one of the substrates being transparent, and an alignment control film formed between the liquid crystal layer and the substrate. At least one of the alignment control films comprises photoreactive polyimide and/or polyamic acid provided with an alignment control ability by irradiation of substantially linearly polarized light.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: May 18, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yasushi Tomioka, Hidetoshi Abe, Katsumi Kondo
  • Patent number: 7675596
    Abstract: A semi-transparent homogeneous-alignment LCD device including a transmission part and a reflection part, a first linear dielectric protrusion disposed between a common electrode and a liquid crystal layer so as to extend over a plurality of pixels in a short side direction of pixels and be disposed nearly in center of the transmission part, and a second linear dielectric protrusion disposed in the reflection part between the common electrode and a first substrate so as to extend over a plurality of pixels in the short side direction, wherein an alignment direction of liquid crystal molecules crosses the first and second linear dielectric protrusions at right angles and is parallel to a long side direction of pixels, and a tilt angle of the liquid crystal molecules is approximately 0°, or even if there is a pre-tilt angle, the tilt angle of the liquid crystal molecules is 2° or less.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: March 9, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Shoichi Hirota, Osamu Itou, Shinichiro Oka, Masaya Adachi, Shinichi Komura, Hirotaka Imayama, Masateru Morimoto, Tetsuya Nagata, Koichi Fukuda, Toshio Miyazawa
  • Patent number: 7626662
    Abstract: A method for fabricating liquid crystal (LC) alignment includes the steps of processing an alignment film having a plurality of liquid crystal molecules with a single or plurality of plasma generating devices, such that the liquid crystal molecules are aligned at a high pretilt angle. Compared with the prior art, the present invention is suitable for modifying the alignment film surface adjustablely in directions and angles, and can attain the effect of alignment stability with a high pretilt angle in a single process, thus overcoming the drawbacks of the prior art.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: December 1, 2009
    Assignee: Industrial Technology Research Institute
    Inventors: Chin-Yang Lee, Huang-Chin Tang, Kei-Hsiung Yang, Chih-Wei Chen, Chi-Hung Liu, Yu-Jung Shih
  • Patent number: 7616279
    Abstract: An array substrate including a substrate, multiple pixels arranged in an array on the substrate, and an alignment film disposed on the pixels is provided. The pixel includes a reflective region, a transmissive region, and a transition region formed between the reflective region and the transmissive region, wherein an included angle between at least one side of the transition region and a rubbing direction of the alignment film is smaller than or equal to 30 degree. In addition, a transflective LCD including the array substrate as described above and a fabricating method of an array substrate is further provided.
    Type: Grant
    Filed: January 18, 2006
    Date of Patent: November 10, 2009
    Assignee: TPO Displays Corp.
    Inventors: Ching-Yu Jang, Chia-Ching Chu, Ying-Yi Chen
  • Patent number: 7532285
    Abstract: An LCD device includes therein a splay-oriented LC layer, first and second substrates sandwiching therebetween the LC layer, and an optical compensation film for reducing leakage light upon display of a black color. The optical compensation film has three optical elastic axes including a fast axis coinciding the Y-axis, a slow axis rotated from the X-axis by a positive rotational angle ? 1, and another axis rotated from the Z-axis by the positive rotational angle ? 1. The positive rotational direction coincides with a counter-clockwise direction within the substrate surface, as viewed from minus side toward the positive side of the Y-axis.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: May 12, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hiroshi Nagai, Hidenori Ikeno
  • Patent number: 7420638
    Abstract: A method of fabricating a liquid crystal display device including vertical alignment layers formed on the substrates. The alignment layer having a polymer realizing vertical alignment is formed on the substrate an unpolarized ultraviolet light is then irradiated in the oblique direction at an angle not more than 45 degrees with respect to the surface of the alignment layer. The ultraviolet light has an exposure energy of 30 to 120 mJ/cm2 per percent of the polymer content realizing the vertical alignment of the alignment layer. The liquid crystal can thus align substantially vertically to the surface of the alignment layer, with a pretilt, and such an alignment is realized by the irradiation of the ultraviolet light, without rubbing.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: September 2, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasutoshi Tasaka, Hidefumi Yoshida, Takatoshi Mayama
  • Patent number: 7394517
    Abstract: A liquid crystal panel including a driving substrate and a counter substrate, the two substrates having a liquid crystal layer interposed therebetween. The driving substrate has pixel electrodes and transistors connected to the pixel electrodes on a surface thereof, which are covered with an alignment film. The counter substrate is provided adjacent to the alignment film of the driving substrate. The alignment film is rubbed in a direction substantially parallel to signal lines or scanning lines connected to the transistors. Each of the pixels has a projection at a substantially central position in a direction perpendicular to the rubbing direction.
    Type: Grant
    Filed: January 14, 2004
    Date of Patent: July 1, 2008
    Assignee: Sony Corporation
    Inventors: Koji Noguchi, Shuichi Tatemori, Osamu Ishige
  • Patent number: 7379144
    Abstract: An optical device includes a ferroelectric liquid crystal material. This optical device has a first and a second substrate. A first alignment treatment is applied to a surface of the first substrate, the first alignment treatment being intended to induce an orientation of at least a portion of the ferroelectric liquid crystal material along a first alignment direction with a first pretilt angle ?1 with respect to a plane parallel to the first substrate. A second alignment treatment is applied to a surface of the second substrate, the second alignment treatment being intended to induce an orientation of at least another portion of the ferroelectric liquid crystal material along a second alignment direction with a second pretilt angle ?2 with respect to a plane parallel to the second substrate.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: May 27, 2008
    Assignee: Displaytech, Inc.
    Inventors: Jiuzhi Xue, Beth L. Ellis, Stephen H. Perlmutter, Charles Crandall
  • Patent number: 7316831
    Abstract: A liquid crystal display device includes an alignment layer with constituent materials. The constituent materials have a stoichiometric relationship configured to provide a given pretilt angle. Liquid crystal material is provided in contact with the alignment layer. A method for forming an alignment layer for liquid crystal displays includes forming the alignment layer on a substrate by introducing an amount of material to adjust a stoichiometric ratio of constituent materials wherein the amount is determined to provide a given pretilt angle to the alignment layer. Ions are directed at the alignment layer to provide uniformity of the pretilt angle.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: January 8, 2008
    Assignee: International Business Machines Corporation
    Inventors: Paul S. Andry, Praveen Chaudhari, James P. Doyle, Eileen A. Galligan, James A. Lacey, Shui-Chih A. Lien, Minhua Lu
  • Publication number: 20070263153
    Abstract: An exemplary liquid crystal display (LCD) device (2) includes a first substrate (21) and a second substrate (22). A liquid crystal layer (23) having liquid crystal molecules is interposed between the first and second substrates. The liquid crystal molecules are bend-aligned such that the liquid crystal display device is able to operate in an optically compensated bend (OCB) mode. A first alignment layer (219) and a second alignment layer (229) are respectively disposed between the liquid crystal layer and the first and second substrates. A passivation layer (227) is disposed between the second alignment layer and the second substrate, which has different height.
    Type: Application
    Filed: May 14, 2007
    Publication date: November 15, 2007
    Inventors: I-An Yao, Chiu-Lien Yang, Chueh-Ju Chen, Hung-Lin Ko, Jin-Jei Wu
  • Publication number: 20070247578
    Abstract: An LCD device (2) includes a first substrate (21), a second substrate (22), and a liquid crystal layer (23) having liquid crystal molecules is interposed between the first and second substrates. A pretilt angle of the liquid crystal layer adjacent to one of the substrates is 0° to 15°, and a pretilt angle of the liquid crystal layer adjacent to the other substrate is 75° to 90°. This ensures that the LCD device provides a good quality display. In addition, the alignment and the pretilt angle of the liquid crystal molecules means that the liquid crystal molecules are hybrid aligned when this is needed, and can be twisted in a very short time.
    Type: Application
    Filed: April 19, 2007
    Publication date: October 25, 2007
    Inventors: Chiu-Lien Yang, Wei-Yi Ling, Chia-Lung Lin
  • Patent number: 7283191
    Abstract: To provide a liquid crystal device with a high contrast ratio without deteriorating the aperture ratios of the respective pixels by reducing inferior alignment in liquid crystal, which is caused by alignment films, a liquid crystal device includes an element substrate having active elements and pixel electrodes, a counter substrate arranged to face the element substrate and having counter electrodes that face the pixel electrodes, and a liquid crystal layer arranged between the element substrate and the counter substrate. On the internal surfaces of the element substrate and the counter substrate, the alignment films are made of column-shaped inorganic material structures inclined in a predetermined direction with respect to the surface of the substrates are provided. The liquid crystal is made of liquid crystal molecules having positive dielectric anisotropy.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: October 16, 2007
    Assignee: Seiko Epson Corporation
    Inventor: Takaaki Tanaka
  • Publication number: 20070229739
    Abstract: The liquid crystal display has first and second substrates having electrodes and a pretilt angle of 88.5° to 89.5°, a liquid crystal layer, having a thickness of d and made of liquid crystal molecule material which has a twist structure at a twist angle of 160° to 240° in a voltage application state, the liquid crystal layer containing chiral material having a pitch of p, where d/p is 0.2 to 0.74, a first polarizer disposed facing the first substrate, the first polarizer having as a transmission axis direction a first direction, a second polarizer disposed facing the second substrate, the second polarizer having as a transmission axis direction a second direction having an angle of 85° to 95° relative to the first direction, and an optical anisotropic plate disposed at least one of between the first substrate and first polarizer and between the second substrate and second polarizer.
    Type: Application
    Filed: March 27, 2007
    Publication date: October 4, 2007
    Applicant: Stanley Electric Co., Ltd.
    Inventor: Yoshihisa Iwamoto