With Particular Polymer Composition Of The Alignment Layer (e.g., Fluorine- Containing Aliphatic Polyamide) Patents (Class 349/135)
  • Patent number: 9134573
    Abstract: A method of manufacturing a photo-alignment layer, includes: disposing a polymer material on a substrate; pre-baking the polymer material disposed on the substrate; irradiating a light to the pre-baked polymer material, to photo-align the pre-baked polymer material; and thermal-treating the irradiated pre-baked polymer material, to harden the irradiated pre-baked polymer material. The thermal-treating includes a first thermal-treatment, and a second thermal-treatment at a higher temperature than the first thermal-treatment.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: September 15, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Mi Hwa Lee, Suk Hoon Kang, Yeong Rong Park, Jun-Woo Lee, Baek Kyun Jeon
  • Patent number: 8988639
    Abstract: A method for fabricating a liquid crystal display device including a TFT substrate having an alignment film formed thereon, an opposing substrate, and a liquid crystal layer sandwiched therebetween. The alignment film on the TFT substrate includes a photolytic polymer made from a first precursor including cyclobutane, and a non-photolytic polymer made from a second precursor. The method includes the steps of depositing a mixture material including the first precursor and the second precursor in which the second precursor settles more on an upper surface of the TFT substrate than the first precursor, imidizing the mixture material, and irradiating the mixture material with ultraviolet light for photo-alignment, and after irradiating, heating the mixture material to form the alignment film.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: March 24, 2015
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Noboru Kunimatsu, Chikae Matsui, Hidehiro Sonoda, Yuko Matsumoto, Shoichi Uchino, Masaki Matsumori, Yasushi Tomioka
  • Publication number: 20150062520
    Abstract: Various layer separation states are generated by the combination of a polyamide acid ester and a polyamide acid and a long residual image characteristic cannot be further improved merely by combining them. A liquid crystal display device comprises a substrate, a liquid crystal layer, and an orientation film placed between the substrate and the liquid crystal layer. The orientation film comprises a polyimide precursor having two or more components. In the polyimide precursor, an octanol-water partition coefficient is defined as log P and the difference in log P (? log P) between the two components having most distant log Ps is set so as to fall within a prescribed range.
    Type: Application
    Filed: September 3, 2014
    Publication date: March 5, 2015
    Inventors: Masaki MATSUMORI, Shuuji IMAZEKI, Yasushi TOMIOKA, Noboru KUNIMATSU
  • Patent number: 8958038
    Abstract: A liquid crystal display device includes first and second substrates, at least one of which is transparent, a liquid crystal layer which is disposed between the first and second substrates, a pixel electrode and a common electrode which are formed on one of the first and second substrates and which apply an electric field to the liquid crystal layer, a plurality of active elements which is connected to the pixel electrode and the common electrode, an alignment film which is disposed on at least one of the first and second substrates and has one surface contacting the liquid crystal layer, and an underlying layer which is disposed on at least one of the first and second substrates and contacts the other surface of the alignment film. The pixel electrode is laminated on the common electrode having a plane shape through an isolation film.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: February 17, 2015
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yasuo Imanishi, Masaki Matsumori, Yasushi Tomioka
  • Publication number: 20150029446
    Abstract: A subject is a polymerizable liquid crystal composition in which tilt alignment is easily developed and an optical anisotropic film obtained therefrom. A solution is a polymerizable liquid crystal composition containing one or more polymerizable liquid crystal compounds selected from compounds represented by formulas (1-1), (1-2) and (1-3), and a polymerizable liquid crystal compound represented by formula (2-1). In the following formula, for example, Z11 and Z12 are hydrogen; W1 is independently hydrogen, fluorine or a methoxy; W2 and W3 are independently hydrogen or methyl; X1 is independently a single bond or —CH2CH2—; and for example, W4 is methyl; and X2 is —O—; and m1, m2, n1 and n2 are 2 to 15. Moreover, Z21 is hydrogen or methyl; R1 is an alkyl ester-containing substituent; W5 is hydrogen; X3 is —COO—; X4 is —O—, for example; and m3 is 2 to 15 and q1 is 0 to 2.
    Type: Application
    Filed: July 14, 2014
    Publication date: January 29, 2015
    Inventor: Yoshiharu HIRAI
  • Patent number: 8906474
    Abstract: Disclosed is a liquid crystal display device including: a first substrate and a second substrate, one of which is transparent; a liquid crystal layer disposed between the first substrate and the second substrate; a group of electrodes for applying an electric field to the liquid crystal layer, which is formed on one of the first substrate and the second substrate; a plurality of active elements connected to the group of electrodes; and an alignment film disposed on one of the first substrate and the second substrate, wherein the alignment film contains a polyimide and a precursor of the polyimide, each of which is formed from a diamine and an acid anhydride, and the diamine contains a first diamine having an acidic group and a second diamine having a nitrogen atom-containing functional group other than two amino groups.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: December 9, 2014
    Assignee: Japan Display Inc.
    Inventors: Masaki Matsumori, Yasuo Imanishi, Yasushi Tomioka, Noboru Kunimatsu
  • Patent number: 8902388
    Abstract: A display device may include a first substrate, a second substrate, and a liquid crystal layer. The first substrate may include a domain-forming layer including a depression pattern for forming a liquid crystal domain in a pixel area and a pixel electrode formed on the domain-forming layer. The second substrate may face the first substrate. The second substrate may include a common electrode formed on the entire surface thereof. The liquid crystal layer may be disposed between the first substrate and the second substrate. The liquid crystal layer may include a reactive mesogen (RM) which fixes liquid crystal molecules formed in the liquid crystal domain. Since a liquid crystal domain may be formed without a separate pattern on a common electrode, a display device having an enhanced aperture ratio and an enhanced viewing angle may be manufactured.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: December 2, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong-Kyu Jang, Jae-Young Lee, Seong-Jun Lee, Yi Li
  • 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: 8866997
    Abstract: Linear photo-oriented polymer (LPP) layers are situated to align liquid crystals in a liquid crystal polymer (LCP) layer situated at or on the LPP layers. The LCP layer can include a guest such as a fluorophore that aligns with the liquid crystal so as to emit polarized fluorescence in response to an excitation beam. Layer LPP/LCP structures can be provided as light emitters, patterned polarizers, patterned retarders and other devices based on selection of one or more guest materials included in the LCP and alignable with the liquid crystal.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: October 21, 2014
    Assignee: Arizona Board of Regents on behalf of the University of Arizona
    Inventors: Stanley Pau, Arshad S. Sayyad, Graham B. Myhre
  • Patent number: 8854582
    Abstract: A method for fabricating a liquid crystal display device having a TFT substrate in which an alignment film is formed over a pixel including a pixel electrode and a TFT, an opposing substrate which faces the TFT substrate, and liquid crystals sandwiched between the TFT substrate and the opposing substrate, the alignment film on the TFT substrate including a first and a second alignment film. The method includes depositing a mixture liquid of polyamide acid ester, 80 percent or more of which is polyamide acid ester including cyclobutane, and polyamide acid not including cyclobutane onto the TFT substrate and the opposing substrate, and after drying and firing the TFT substrate and the opposing substrate to harden the alignment film, irradiating the alignment film with ultraviolet light for photo-alignment of the alignment film and, thereafter, heating the TFT substrate and the opposing substrate, thereby forming the alignment film.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: October 7, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Noboru Kunimatsu, Chikae Matsui, Hidehiro Sonoda, Yuko Matsumoto, Shoichi Uchino, Masaki Matsumori, Yasushi Tomioka
  • Patent number: 8758871
    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 109 comprises photoreactive polyimide and/or polyamic acid provided with an alignment control ability by irradiation of substantially linearly polarized light.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: June 24, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yasushi Tomioka, Hidetoshi Abe, Katsumi Kondo
  • Patent number: 8741398
    Abstract: The present invention provides a liquid crystal panel and an alignment film thereof, and the alignment film is made of a modified polyimide which has conjugated double bond at side chain. Resistance value of the alignment film is less than the resistance value of a liquid crystal material of the liquid crystal panel by properties of the conjugated double bond that can reduce the resistance value of a prior art polyimide. In addition, improving the imidization ratio of a modified polyimide alignment film is important. The present invention is conducted the charged ion from liquid crystal layer to the alignment film by the conjugated double bond of the modified polyimide at the side chain to prevent the increase in the ion density of the liquid crystal in part of this area, and improve the problem of image sticking.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: June 3, 2014
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventors: Chung-Ching Hsieh, Cheng-ming He
  • Patent number: 8692970
    Abstract: Disclosed is a manufacturing method of a liquid crystal display device which is a manufacturing method of a liquid crystal display device including a liquid crystal alignment film to which an alignment regulating force is imparted by a photo-alignment treatment, including: a film forming step of forming a film containing a polymer whose main chain is cleaved by irradiation with light; a photo-alignment step of imparting an alignment regulating force to the film formed in the film forming step by irradiation of the film with light in an atmosphere of a temperature lower than 100° C.; and a removing step of removing a low-molecular weight component generated by cleaving the main chain of the polymer through the light irradiation after the light irradiation. Also disclosed is a liquid crystal display device manufactured by the manufacturing method.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: April 8, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Shoichi Uchino, Noboru Kunimatsu, Hidehiro Sonoda, Chikae Matsui, Yuko Matsumoto, Tomio Yaguchi, Toshiki Kaneko, Jun Tanaka
  • Patent number: 8681300
    Abstract: A liquid crystal display device includes a pair of substrates, a liquid crystal between substrates and alignment layers disposed on the inner surface sides of the substrates. The alignment layer is made from a material including polyamic acid containing a diamine component and polyimide containing a diamine component different from the diamine component of the polyamic acid. The alignment layer is subjected to alignment treatment by irradiation of light. UV light can be irradiated in the oblique direction onto the alignment layer through a mask having openings. A reflecting plate can be arranged between a UV light source and the mask. Also, bank structures having a thickness from 0.1 to 0.15 ?m can be provided on the alignment layer of the TFT substrate.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: March 25, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hideo Chida, Hidefumi Yoshida, Yasutoshi Tasaka
  • Patent number: 8654290
    Abstract: A liquid crystal display device (1) includes a first substrate (2), a second substrate (3) provided to face the first substrate (2), a liquid crystal layer (4) sandwiched between the first substrate (2) and the second substrate (3), a first polarizing plate (5) and a second polarizing plate (6) respectively provided on a side of the first substrate (2) and a side of the second substrate (3) which are opposed to sides to which the liquid crystal layer (4) is provided, and a common electrode (7) and a pixel electrode (9) provided to the liquid crystal layer (4) side of the first substrate (2). Alignment of liquid crystal molecules (4a) of the liquid crystal layer (4) is controlled by an electric field generated between the common electrode (7) and the pixel electrode (9). A polarizing layer (13) is provided on the liquid crystal layer (4) side of the second substrate (3) so as to be in contact with the liquid crystal layer (4).
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: February 18, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masanobu Mizusaki, Tadashi Ohtake, Takashi Katayama, Masako Nakamura
  • Patent number: 8648988
    Abstract: This invention enables forming a photo-alignment film having a large LC anchoring strength in an IPS type liquid crystal display device. An alignment film is adapted to have a two-layer structure including a photo-alignment film and an alignment film with enhanced film strength. The photo-alignment film is formed of a precursor of polyamide acid ester, 80 percent or more of which is polyamide acid ester including cyclobutane. The alignment film with enhanced film strength is formed of a precursor of polyamide acid. After irradiating the substrate with ultraviolet light for photo-alignment, the substrate is heated. Thus, it is possible to achieve a high LC anchoring strength of the alignment film as the whole for photo-alignment, without degrading the mechanical strength of the alignment film with enhanced film strength.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: February 11, 2014
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Noboru Kunimatsu, Chikae Matsui, Hidehiro Sonoda, Yuko Matsumoto, Shoichi Uchino, Masaki Matsumori, Yasushi Tomioka
  • Patent number: 8610855
    Abstract: Provided is a liquid crystal display device having a structure in which one surface of the alignment film contacts a liquid crystal layer, the other surface of the alignment film contacts an underlying layer, the refractive index of the alignment film monotonically increases in a film thickness direction of the alignment film from a boundary surface between the liquid crystal layer and the alignment film to a boundary surface between the underlying layer and the alignment film, and the minimum refractive index nLC of the liquid crystal layer, the refractive index nF2 of the alignment film at the boundary surface between the liquid crystal layer and the alignment film, the refractive index nF1 of the alignment film at the boundary surface between the alignment film and the underlying layer, and the refractive index nS2 of the underlying layer have a relationship of an equation (I) in which nLC?nF2<nF1?nS2.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: December 17, 2013
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yasuo Imanishi, Masaki Matsumori, Yasushi Tomioka
  • Patent number: 8558973
    Abstract: A liquid crystal display panel includes an active component array substrate, a color filter substrate, a pair of alignment films and a liquid crystal layer. The active component array substrate has a first plane. The color filter substrate has a second plane opposite to the first plane. The alignment films are disposed on the first plane and the second plane respectively. The liquid crystal layer is disposed between the alignment films and includes a liquid crystal material, a photo initiator and a first monomer material. The liquid crystal material, the photo initiator and the first monomer material are mixed together. When being irradiated by ultraviolet light, the photo initiator enables the first monomer material to react in a polymerization to form the alignment films.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: October 15, 2013
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chun-Wei Su, Jan-Tien Lien, Hui-Chen Lin
  • Patent number: 8481130
    Abstract: The invention relates to an alignment layer with improved adhesion to liquid crystal (LC) films, to a precursor material used for the preparation of such a layer, to a laminate comprising such a layer and at least one LC polymer film, and to the use of the alignment layer and the laminate for optical, electrooptical, decorative or security uses and devices, wherein the alignment layer and the precursor material comprise at least one reactive mesogen in monomeric, oligomeric or polymeric form.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: July 9, 2013
    Assignee: MERCK PATENT GmbH
    Inventors: Richard Harding, Alison Linda May, Simon Greenfield, Johan Lub, Ciska Doornkamp, Rene Theodorus Wegh
  • Patent number: 8441605
    Abstract: The present invention provides a polarizing plate including: a layer of polarizer for polarizing incident light and emitting the polarized light; and a coating type optically anisotropic layer disposed on the side to which the polarized light is emitted from the polarizer layer.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: May 14, 2013
    Assignee: Japan Display West Inc.
    Inventor: Eiji Sakai
  • 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
  • Patent number: 8409674
    Abstract: The invention relates to an alignment layer for aligning liquid crystal molecules, with improved adhesion to liquid crystal (LC) films, to a composition containing a precursor material used for the preparation of such a layer, to a laminate comprising such a layer and at least one LC polymer film, and to the use of the alignment layer and the laminate for optical, electrooptical, decorative or security uses and devices, wherein the alignment layer and the precursor material comprise at least one reactive mesogen in monomeric, oligomeric or polymeric form.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: April 2, 2013
    Assignee: Merck Patent GmbH
    Inventors: Richard Harding, Alison Linda May, Simon Greenfield, Johan Lub, Ciska Doornkamp, René Theodorus Wegh
  • Patent number: 8400595
    Abstract: A liquid crystal display device includes a pair of substrates, a liquid crystal between substrates and alignment layers disposed on the inner surface sides of the substrates. The alignment layer is made from a material including polyamic acid containing a diamine component and polyimide containing a diamine component different from the diamine component of the polyamic acid. The alignment layer is subjected to alignment treatment by irradiation of light. UV light can be irradiated in the oblique direction onto the alignment layer through a mask having openings. A reflecting plate can be arranged between a UV light source and the mask. Also, bank structures having a thickness from 0.1 to 0.15 ?m can be provided on the alignment layer of the TFT substrate.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: March 19, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hideo Chida, Hidefumi Yoshida, Yasutoshi Tasaka
  • Patent number: 8384866
    Abstract: The present invention is directed to a VA-mode liquid crystal display panel wherein, by radiating light such as ultraviolet rays to a first alignment film, main chains in molecules of the alignment film are arranged to form a first slow axis. By also radiating the light to a second alignment film, a second slow axis is formed. The first slow axis and the second slow axis are arranged to cross each other. When an electric field is applied to a liquid crystal layer, liquid crystal molecules tilt in the direction which crosses the extending direction of projections formed on a substrate. The projections are formed such that the direction along which the liquid crystal molecules tilt and a first slow axis or a second slow axis differ from each other.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: February 26, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Chikae Matsui, Hidehiro Sonoda
  • Patent number: 8345201
    Abstract: An alignment film material according to the present invention includes: a precursor of a first polyimide (p1); a second polyimide (p2) and a precursor thereof; and a vinyl-type monomer. The vinyl-type monomer is represented by general formula (1) P1-A1-(Z1-A2)n-P2 (in general formula (1), P1 and P2 are, independently, acrylate, methacrylate, acrylamide or methacrylamide; A1 and A2 represent, independently, 1,4-phenylene, 1,4-cyclohexane or 2,5-thiophene, or naphthalene-2,6-diyl or anthracene-2,7-diyl; at least one of A1 and A2 is substituted by at least one fluorine group; and Z1 is a —COO— group, a —OCO— group, a —O— group, a —CONH— group or a single bond, where n is 0 or 1).
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: January 1, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masanobu Mizusaki, Yohei Nakanishi
  • Patent number: 8218114
    Abstract: The invention relates to a vertical alignment type liquid crystal display and a method of manufacturing the same and provides a liquid crystal display and a method of manufacturing the same which allow a reduction of manufacturing cost. A configuration is employed, which includes a pair of substrates provided opposite to each other, a liquid crystal sealed between the substrates, and a photo-curing material for controlling the alignment of the liquid crystal, the photo-curing material being formed in the vicinity of an interface between the liquid crystal and the pair of substrates as a result of polymerization of a polymerizable component mixed in the liquid crystal, the reaction being promoted by a photo-initiator including no chlorine atom.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: July 10, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Shingo Kataoka
  • 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: 7961283
    Abstract: In order to improve the state of image irregularities of a liquid crystal panel, a plasma treatment is performed for an alignment film using a treatment gas such as hydrogen and/or deuterium, or a surface treatment is performed in which an alignment film is immersed in deuterium oxide. As a result, moisture contained in the alignment film is removed, and re-adsorption of moisture is also suppressed, thereby reducing image irregularities.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: June 14, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Sakai, Nobuo Kawase
  • Patent number: 7907247
    Abstract: 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 includes a first alignment treatment substrate and a second alignment treatment substrate in which the first alignment treatment substrate and the second alignment treatment substrate have the first alignment layer and a reactive liquid crystal layer that face each other; and in which a ferroelectric liquid crystal is held between the first alignment layer and the reactive liquid crystal layer.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: March 15, 2011
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Masato Okabe, Naoko Sawatari, Hideo Hama
  • Patent number: 7901605
    Abstract: The liquid crystal display device of the present invention comprises first and second substrates; a first alignment layer on the first substrate, wherein the first alignment layer includes (spacer S is oxygen, m=10˜10,000), the functional group R includes photo-sensitive constituents and/or non-photo-sensitive constituents, the photo-sensitive constituent includes a material selected from the group consisting of cinnamoyl derivatives, the non-photo-sensitive constituent includes a material selected from the group consisting of CnH2n, CnH2n+1, CnH2nOH, COCnH2n+1, COCnH2n, CnH2n+1?xFx, CnH2n?(x?1)F(x?1), CnH2n?xFxOH, COCnH2n+1?xFx (n=1˜10, x=1˜2n+1), and a combination thereof; and a liquid crystal layer between the first and second substrates.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: March 8, 2011
    Assignee: LG Display Co., Ltd.
    Inventors: Mi Sook Nam, Young Seok Choi
  • Patent number: 7790248
    Abstract: An active matrix type liquid crystal display apparatus has a pair of substrates, at least one of the substrates being transparent; a liquid crystal layer arranged between the pair of substrates; and electrode structure for generating an electric field having a dominant component parallel to a surface of the substrate and passing through the liquid crystal layer, the electrode structure being formed on one of the pair of substrates; a pair of alignment layers formed on respective surfaces in contact with the liquid crystal layer of the pair of substrates; and a pair of polarizing plates arranged so as to sandwich the pair of substrates, wherein the glass transition temperature Tg of a boundary surface between said liquid crystal layer and the alignment layer is higher than the nematic-isotropic phase transition temperature T(N?I) of a liquid crystal composite forming the liquid crystal layer.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: September 7, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Yasushi Tomioka, Takao Miwa, Katsumi Kondo, Hisao Yokokura
  • Patent number: 7782430
    Abstract: A liquid crystal display device includes a pair of substrates, a liquid crystal between substrates and alignment layers disposed on the inner surface sides of the substrates. The alignment layer is made from a material including polyamic acid containing a diamine component and polyimide containing a diamine component different from the diamine component of the polyamic acid. The alignment layer is subjected to alignment treatment by irradiation of light. UV light can be irradiated in the oblique direction onto the alignment layer through a mask having openings. A reflecting plate can be arranged between a UV light source and the mask. Also, bank structures having a thickness from 0.1 to 0.15 ?m can be provided on the alignment layer of the TFT substrate.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: August 24, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hideo Chida, Hidefumi Yoshida, Yasutoshi Tasaka
  • Patent number: 7777848
    Abstract: In order to improve the state of image irregularities of a liquid crystal panel, a plasma treatment is performed for an alignment film using a treatment gas such as hydrogen and/or deuterium, or a surface treatment is performed in which an alignment film is immersed in deuterium oxide. As a result, moisture contained in the alignment film is removed, and re-adsorption of moisture is also suppressed, thereby reducing image irregularities.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: August 17, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Sakai, Nobuo Kawase
  • Patent number: 7755732
    Abstract: A liquid crystal stabilizing layer may be disposed on a substrate, an opposite substrate, or both of a liquid crystal display panel. Additionally, a liquid crystal layer may be sealed between the opposing substrates. The liquid crystal stabilizing layer may have a number of protrusions. The height of the protrusions ranges from 10 to 200 nanometers and the width of the protrusions ranges from 150 to 600 nanometers.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: July 13, 2010
    Assignee: Chimei Innolux Corporation
    Inventors: Chen Kuan Kao, Yu Ting Tsai
  • Patent number: 7733452
    Abstract: The present invention relates to a liquid crystal alignment agent, a liquid crystal device produced by using the liquid crystal alignment agent thereof, and a method for alignment of liquid crystal molecules by using the liquid crystal alignment agent. In more detail, the present embodiments relates to a novel liquid crystal alignment agent used in a method of aligning liquid crystal molecules, wherein the agent includes a molecule having a highly polar functional group grafted onto an end of the molecule.
    Type: Grant
    Filed: May 6, 2005
    Date of Patent: June 8, 2010
    Assignee: Kent State University
    Inventors: Cheng Chen, Philip J. Bos, James E. Anderson
  • Patent number: 7728934
    Abstract: A method for fabricating a liquid crystal display (LCD) is provided. The method includes the steps stated below. At first, providing an LCD panel including a first substrate, a second substrate and a liquid crystal layer therebetween. The liquid crystal layer includes several photo-sensitive monomers and several liquid crystal molecules. The LCD panel has at least a first pixel and a second pixel. Afterwards, correspondingly driving the first pixel and the second pixel by the first voltage and the second voltage. At last, applying a ultra-violet source onto the LCD panel to enable several photo-sensitive monomers to polymerize several alignment polymers on the first substrate and the second substrate.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: June 1, 2010
    Assignee: AU Optronics Corp.
    Inventor: Hao-Yu Chang
  • 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: 7687118
    Abstract: A diamine compound is proposed as well as polymers, copolymers, polyamic acids, polyamic acid esters, or polyimides based on such compound. The compound is represented by one of the general formulae (Ia) and (Ib). It could be shown that such structures, in particular for a specific choice of the residue B, provide, if e.g. used as orientation layers, a photostable, vertically aligning material with an improved VHR.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: March 30, 2010
    Assignee: Rolic AG
    Inventors: Zoubair Mohammed Cherkaoui, Thomas Bachels, Guy Marck, Olivier Müller, Andreas Schuster, Hubert Seiberle
  • Patent number: 7665906
    Abstract: An electrical connector includes an entry slot, first and second transmitter electrical pins, and first and second receiver electrical pins. The first and second transmitter electrical pins and the first and second receiver electrical pins are provided on the entry slot. The entry slot accepts a multi form-factor pluggable transceiver which has first and second optical transmitter channels and first and second optical receiver channels. The first transmitter electrical pins are electrically connected to first transmitter electrical pads of the first optical transmitter channel. The second transmitter electrical pins are electrically connected to second transmitter electrical pads of the second optical transmitter channel. The first receiver electrical pins are electrically connected to first receiver electrical pads of the first optical receiver channel. The second receiver electrical pins are electrically connected to second receiver electrical pads of the second optical receiver channel.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: February 23, 2010
    Assignee: Ibiden Co., Ltd.
    Inventors: Takemasa Tamanuki, Chris Keller
  • Patent number: 7615260
    Abstract: An active-matrix liquid crystal display device includes a pair of substrates, a liquid crystal layer disposed between the pair of substrates, a group of electrodes for applying to the liquid crystal layer an electric field substantially parallel to the substrate plane and a plural number of active elements being formed on one of the pair of substrates, and an alignment layer disposed between the liquid crystal layer and at least one of the pair of substrates. The alignment layer is made from polyamic acid obtained by reacting a diamine with an acid anhydride, and the acid anhydride is at least one member selected from the group consisting of 1,2,3,4-cyclopentanetetracarboxylic acid dianhydride, 1,2,3,4-butanetetracarboxylic acid dianhydride, and 1,2,3,4-cyclobutanetetracarboxylic acid dianhydride.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: November 10, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Yoneya, Kishiro Iwasaki, Yasushi Tomioka, Hisao Yokokura, Katsumi Kondo, Yoshiharu Nagae
  • Patent number: 7599041
    Abstract: A liquid crystal display using a ferroelectric liquid crystal, which can give mono-domain alignment of the ferroelectric liquid crystal without forming alignment defects such as zigzag defects, hairpin defects and double domains and which is so remarkably good in alignment stability that the alignment thereof can be maintained even if the temperature of the liquid crystal is raised to the phase transition point or higher. The liquid crystal display has a ferroelectric liquid crystal sandwiched between two substrates, wherein an electrode and a photo alignment layer are each successively formed on opposite faces of the two substrates facing each other, and a constituent material of the respective photo alignment layer has a different composition with the ferroelectric liquid crystal sandwiched there between.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: October 6, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Naoko Sawatari, Masato Okabe, Hideo Hama
  • Patent number: 7553524
    Abstract: The invention provides a liquid crystal display using a ferroelectric liquid crystal, which can give mono-domain alignment of the ferroelectric liquid crystal without forming alignment defects which is so remarkably good in alignment stability that the alignment thereof can be maintained even if the temperature of the liquid crystal is raised to the phase transition point or higher. The present invention provides a liquid crystal display comprising a ferroelectric liquid crystal sandwiched between two substrates, wherein an electrode and a photo alignment layer are each successively formed a constituent material of the respective photo alignment layer is a photoreactive material which generates a photoreaction to give anisotropy to the photo alignment layer; and the constituent material of the respective photo alignment layer has different composition from each other with the ferroelectric liquid crystal sandwiched therebetween.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: June 30, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Naoko Sawatari, Masato Okabe, Hideo Hama
  • Patent number: 7553525
    Abstract: A liquid crystal display using a ferroelectric liquid crystal, which can give mono-domain alignment of the ferroelectric liquid crystal without forming alignment defects such as zigzag defects, hairpin defects and double domains and which is so remarkably good in alignment stability that the alignment thereof can be maintained even if the temperature of the liquid crystal is raised to the phase transition point or higher. The liquid crystal display has a ferroelectric liquid crystal sandwiched between two substrates, wherein an electrode and a photo alignment layer are each successively formed on opposite faces of the two substrates facing each other, and a constituent material of the respective photo alignment layer has a different composition with the ferroelectric liquid crystal sandwiched therebetween.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: June 30, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Naoko Sawatari, Masato Okabe, Hideo Hama
  • Patent number: 7553521
    Abstract: The invention provides a liquid crystal displays using a ferroelectric liquid crystal, which can give mono-domain alignment of ferroelectrical liquid crystal without forming orientation defects and which is so remarkably good in orientation stability that the orientation thereof can be maintained even if the temperature of the liquid crystal is raised to the phase transition point or higher. The invention provides liquid crystal displays comprising a ferroelectric liquid crystal sandwiched between two substrates, wherein an electrode and a photo alignment film are each successively formed, the first of which is a photoreactive material which generates photoreaction to give anisotropy to the photo alignment film, and the constituent material of the second film is an optically isomerizable material comprising an optically isomerization-reactive compound.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: June 30, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Naoko Sawatari, Masato Okabe, Hideo Hama
  • Patent number: 7499135
    Abstract: A method of controlling the alignment of a ferroelectric liquid crystal without the need of an alignment process, such as a rubbing process and a photo alignment process, in a liquid crystal display using a ferroelectric liquid crystal. The method uses a columnar alignment layer having a column structure with a plate-like molecule having photo dichroism in the visible light range as one of the alignment layers for controlling the alignment of the ferroelectric liquid crystal. The method forms a reactive liquid crystal layer produced by fixing a reactive liquid crystal including a polymerizable liquid crystal material on the side to be contacted with the ferroelectric liquid crystal on the columnar alignment layer, showing the nematic phase on the columnar alignment layer.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: March 3, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Masato Okabe, Naoko Sawatari, Makoto Ishikawa
  • Patent number: 7476424
    Abstract: A liquid crystal display device has no defects caused by a rubbing process. The liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer injected between the first substrate and the second substrate, and a liquid crystal alignment layer that arranges alkane chains having at least 18 carbon atoms in parallel toward the substrate. The siloxane-based liquid crystalline alignment layer produces a uniform layer that resists defects and delamination.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: January 13, 2009
    Assignee: LG Philips LCD Co., Ltd.
    Inventors: Ho-Young Jeong, Hyeon-Ho Son
  • Patent number: 7429412
    Abstract: A liquid crystal display device includes a first substrate; a second substrate; a first alignment layer on the first substrate, the first alignment layer including a first additive; a second alignment layer on the second substrate; and a liquid crystal layer between the first substrate and the second substrate.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: September 30, 2008
    Assignee: LG Display Co., Ltd.
    Inventors: Mi Sook Nam, Su Hyun Park
  • Patent number: 7430033
    Abstract: A liquid crystal display device includes a pair of substrates, a liquid crystal between substrates and alignment layers disposed on the inner surface sides of the substrates. The alignment layer is made from a material including polyamic acid containing a diamine component and polyimide containing a diamine component different from the diamine component of the polyamic acid. The alignment layer is subjected to alignment treatment by irradiation of light. UV light can be irradiated in the oblique direction onto the alignment layer through a mask having openings. A reflecting plate can be arranged between a UV light source and the mask. Also, bank structures having a thickness from 0.1 to 0.15 ?m can be provided on the alignment layer of the TFT substrate.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: September 30, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hideo Chida, Hidefumi Yoshida, Yasutoshi Tasaka
  • 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: RE41176
    Abstract: A liquid crystal display device including a first substrate having a contact hole and second substrate substantially in parallel with the first substrate. Each substrate has electrodes on an inner side thereof with the electrodes of the first substrate being connected to the electrodes of the second substrate at a location which is close to an edge of the contact hole.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: March 30, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Toshio Oh-Ide