Patents by Inventor Yohei Nakanishi

Yohei Nakanishi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20110063553
    Abstract: The invention relates to a liquid crystal display based on an MVA mode of multi-division alignment in which alignment states of liquid crystal molecules having a negative dielectric anisotropy are made different from each other, and provides a liquid crystal display in which a drop in transmittance is suppressed and response characteristics are improved.
    Type: Application
    Filed: November 22, 2010
    Publication date: March 17, 2011
    Applicant: 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
  • Publication number: 20110058134
    Abstract: When radiating light onto a liquid crystal composition containing a photosensitive material, the alignment of liquid crystal molecules is adjusted by applying a voltage to the liquid crystal composition layer, to achieve substantially orderly alignment of the liquid crystal molecules, or the alignment of the liquid crystal molecules is made uniform by adjusting the structure of the liquid crystal display device, or any display defect is driven out of the display area. When radiating light to the liquid crystal composition containing the photosensitive material, the alignment of the liquid crystal molecules can be adjusted so as to achieve substantially orderly alignment of the liquid crystal molecules, and the liquid crystal display device can thus be driven stably.
    Type: Application
    Filed: November 15, 2010
    Publication date: March 10, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hiroyasu Inoue, Kenichi Nagaoka, Yuji Nakahata, Yoji Taniguchi, Tetsuya Fujikawa, Yohei Nakanishi, Kazutaka Hanaoka, Yuichi Inoue, Masakazu Shibasaki
  • Patent number: 7903215
    Abstract: The invention relates to a liquid crystal display in which a polymeric component included in a liquid crystal layer is polymerized while adjusting a voltage applied to the liquid crystal layer to regulate the direction of alignment of liquid crystal molecules during polymerization and a method of manufacturing the same. The invention provides a liquid crystal display in which image sticking is mitigated and a method of manufacturing the same. In a method of manufacturing a liquid crystal display in which a liquid crystal composition including a polymeric component that is optically or thermally polymerized is sealed between substrates and in which the polymeric component is polymerized while applying a voltage to the liquid crystal composition to regulate the direction of alignment of liquid crystal molecules during driving, a configuration is employed such that a polymerization initiator in the liquid crystal composition has a concentration x that satisfies 0?x?0.002 (% by weight).
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: March 8, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yohei Nakanishi, Hiroyasu Inoue, Yuji Nakahata, Kengo Kanii, Kazutaka Hanaoka, Masakazu Shibasaki, Yuichi Inoue
  • Publication number: 20110043729
    Abstract: A polymerizable compound in a liquid crystal composition is polymerized in a state that liquid crystal molecules present in a gap between a pixel electrode and at least either one of signal electrodes and scanning electrodes are tilted in a direction from the at least either one of the signal electrodes and the scanning electrodes toward the pixel electrode. Preferably, the amount of the polymerizable compound remaining in the liquid crystal phase after the polymerization is not more than 0.05 parts by weight per 100 parts by weight of the liquid crystal. In a seal section surrounding the liquid crystal layer, a second seal wall is preferably provided at a position opposite to the liquid crystal injection inlet in the non-display section.
    Type: Application
    Filed: October 29, 2010
    Publication date: February 24, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yohei Nakanishi, Yuichi Inoue, Kazutaka Hanaoka, Hidefumi Yoshida, Yasutoshi Tasaka, Kunihiro Tashiro
  • Publication number: 20110037915
    Abstract: The invention relates to a liquid crystal display device and provides a liquid crystal display device which can achieve high display quality. A liquid crystal display device is provided with first and second TFTs each having a gate electrode connected to an nth gate bus line and a drain electrode connected to a drain bus line; a first pixel electrode connected to a source electrode of the first TFT; a second pixel electrode connected to a source electrode of the second TFT; a third TFT having a gate electrode connected to an (n+1)th gate bus line and a source electrode connected to the second pixel electrode; and a buffer capacitance portion having a buffer capacitance electrode which is formed in the same layer as the first and second pixel electrodes and is connected to a drain electrode of the third TFT and a buffer capacitance electrode connected to a storage capacitance bus line.
    Type: Application
    Filed: October 6, 2010
    Publication date: February 17, 2011
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yasutoshi Tasaka, Yohei Nakanishi, Masakazu Shibasaki, Tsuyoshi Kamada, Hidefumi Yoshida, Hideaki Tsuda
  • 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: 7868981
    Abstract: A liquid crystal display device including a pair of substrates and a liquid crystal layer sandwiched between the pair of substrates, as well as a source electrode, a Cs intermediate electrode, and a pixel electrode formed on one of the pair of substrates. The liquid crystal display device also includes vertical alignment films formed on the pair of substrates and polymer layers formed on the vertical alignment films, wherein a contact hole, which connects the source electrode and the pixel electrode, and another contact hole, which connects the pixel electrode and the Cs intermediate electrode, are both formed at a liquid crystal domain boundary.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: January 11, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroyasu Inoue, Kenichi Nagaoka, Yuji Nakahata, Yoji Taniguchi, Tetsuya Fujikawa, Yohei Nakanishi, Kazutaka Hanaoka, Yuichi Inoue, Masakazu Shibasaki
  • Publication number: 20110001913
    Abstract: A liquid crystal display device according to the present invention is constituted of a TFT substrate and an opposing substrate which are arranged so as to be opposite to each other with a liquid crystal layer interposed therebetween. In addition, in the liquid crystal layer, formed is a polymer into which a polymer component added to liquid crystal is polymerized, and which determines directions in which liquid crystal molecules tilt when voltage is applied. In the TFT substrate, formed are a sub picture element electrode directly connected to a TFT and a sub picture element electrode connected to the TFT through capacitive coupling. In each of these sub picture element electrodes, formed are slits extending in directions respectively at angles of 45 degrees, 135 degrees, 225 degrees and 315 degrees to the X axis.
    Type: Application
    Filed: May 21, 2010
    Publication date: January 6, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yohei Nakanishi, Kunihiro Tashiro, Katsufumi Ohmuro, Kazutaka Hanaoka, Jin Hirosawa, Norio Sugiura, Kengo Kanii, Shota Makimoto, Naoto Kondo, Isao Tsushima, Tomonori Tanose, Takashi Takagi, Tetsuya Fujikawa
  • Patent number: 7859624
    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: May 4, 2007
    Date of Patent: December 28, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hidefumi Yoshida, Yasutoshi Tasaka, Takashi Sasabayashi, Yohei Nakanishi, Kenji Okamoto
  • Patent number: 7847900
    Abstract: The invention relates to a manufacturing method of a liquid crystal display device in which an alignment direction of a liquid crystal molecule at the time of driving is regulated by using a polymer, and has an object to provide a manufacturing method of a liquid crystal display device in which excellent display characteristics can be obtained. A liquid crystal layer containing a polymerizable component capable of being polymerized by light is sealed between two substrates arranged to be opposite to each other, the polymerizable component is polymerized by irradiation of light under a predetermined light irradiation condition while a voltage is applied to the liquid crystal layer under a predetermined voltage application condition, and when a pre-tilt angle of a liquid crystal molecule and/or an alignment direction at a time of driving is regulated, at least one of the voltage application condition and the light irradiation condition is changed for each region.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: December 7, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yohei Nakanishi
  • Patent number: 7843531
    Abstract: To provide a liquid crystal display device of high image quality, and a manufacturing method therefor. A polymerizable compound in a liquid crystal composition is polymerized in a state that liquid crystal molecules present in a gap between a pixel electrode and at least either one of signal electrodes and scanning electrodes are tilted in a direction from the at least either one of the signal electrodes and the scanning electrodes toward the pixel electrode. Preferably, the amount of the polymerizable compound remaining in the liquid crystal phase after the polymerization is not more than 0.05 parts by weight per 100 parts by weight of the liquid crystal. In a seal section surrounding the liquid crystal layer, a second seal wall is preferably provided at a position opposite to the liquid crystal injection inlet in the non-display section.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: November 30, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yohei Nakanishi, Yuichi Inoue, Kazutaka Hanaoka, Hidefumi Yoshida, Yasutoshi Tasaka, Kunihiro Tashiro
  • Patent number: 7834949
    Abstract: A liquid crystal display device is provided with first and second TFTs each having a gate electrode connected to an nth gate bus line and a drain electrode connected to a drain bus line; a first pixel electrode connected to a source electrode of the first TFT; a second pixel electrode connected to a source electrode of the second TFT; a third TFT having a gate electrode connected to an (n+1)th gate bus line and a source electrode connected to the second pixel electrode; and a buffer capacitance portion having a buffer capacitance electrode which is formed in the same layer as the first and second pixel electrodes and is connected to a drain electrode of the third TFT and a buffer capacitance electrode connected to a storage capacitance bus line. The buffer capacitance portion establishes capacitive coupling.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: November 16, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasutoshi Tasaka, Yohei Nakanishi, Masakazu Shibasaki, Tsuyoshi Kamada, Hidefumi Yoshida, Hideaki Tsuda
  • Patent number: 7830345
    Abstract: One picture element is divided into first and second sub-picture element regions. A sub-picture element electrode connected directly (not via capacitive coupling) to a source electrode of a TFT is placed in the first sub-picture element region and a sub-picture element electrode capacitively coupled to a control electrode connected to a source electrode is placed in the second sub-picture element region. A transparent resin film is formed in the first sub-picture element region and this makes a liquid crystal layer thickness in the second sub-picture element region thicker than that of the first sub-picture element region.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: November 9, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hidefumi Yoshida, Yasutoshi Tasaka, Hideaki Tsuda, Yohei Nakanishi, Tsuyoshi Kamada, Masakazu Shibasaki
  • Patent number: 7821603
    Abstract: A vertical alignment type liquid crystal display device including a plurality of pixels, which further includes a first substrate and a second substrate and a liquid crystal layer between the first substrate and the second substrate. The first substrate and the second substrate include alignment control structures which extend linearly, and when viewed in a direction vertical to the first substrate, in a pixel, the alignment control structure of the first substrate and the alignment control structures of the second substrate are arranged alternately. The alignment control structure of the first substrate includes first and second linear portions, and distances between the first and second linear portions and an adjacent alignment control structure of the second substrate are different from each other. Additionally, each of the first and second linear portions and the alignment control structures of the second substrate are arranged in parallel.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: October 26, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Arihiro Takeda, Katsufumi Ohmuro, Yoshio Koike, Shingo Kataoka, Takahiro Sasaki, Takashi Sasabayashi, Hideaki Tsuda, Hideo Chida, Makoto Ohashi, Kenji Okamoto, Hisashi Yamaguchi, Minoru Otani, Makoto Morishige, Noriaki Furukawa, Tsuyoshi Kamada, Yoshinori Tanaka, Atuyuki Hoshino, Shougo Hayashi, Hideaki Takizawa, Takeshi Kinjou, Makoto Tachibanaki, Keiji Imoto, Tadashi Hasegawa, Hidefumi Yoshida, Hiroyasu Inoue, Yoji Taniguchi, Tetsuya Fujikawa, Satoshi Murata, Manabu Sawasaki, Tomonori Tanose, Siro Hirota, Masahiro Ikeda, Kunihiro Tashiro, Kouji Tsukao, Yasutoshi Tasaka, Takatoshi Mayama, Seiji Tanuma, Yohei Nakanishi
  • Publication number: 20100265448
    Abstract: A liquid crystal display device according to the present invention is constituted of a TFT substrate and an opposing substrate which are arranged so as to be opposite to each other with a liquid crystal layer interposed therebetween. In addition, in the liquid crystal layer, formed is a polymer into which a polymer component added to liquid crystal is polymerized, and which determines directions in which liquid crystal molecules tilt when voltage is applied. In the TFT substrate, formed are a sub picture element electrode directly connected to a TFT and a sub picture element electrode connected to the TFT through capacitive coupling. In each of these sub picture element electrodes, formed are slits extending in directions respectively at angles of 45 degrees, 135 degrees, 225 degrees and 315 degrees to the X axis.
    Type: Application
    Filed: May 21, 2010
    Publication date: October 21, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yohei Nakanishi, Kunihiro Tashiro, Katsufumi Ohmuro, Kazutaka Hanaoka, Jin Hirosawa, Norio Sugiura, Kengo Kanii, Shota Makimoto, Naoto Kondo, Isao Tsushima, Tomonori Tanose, Takashi Takagi, Tetsuya Fujikawa
  • Publication number: 20100188621
    Abstract: A liquid crystal display device of the present invention is arranged such that a retardation of a liquid crystal layer which obtained while no voltage is applied falls within ± (a value which is one-tenth of a main wavelength) of a value obtained by adding natural number times the main wavelength to a total retardation of at least one optical compensation film. This allows suppression of a transmittance during no voltage application.
    Type: Application
    Filed: May 23, 2008
    Publication date: July 29, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yohei Nakanishi
  • Patent number: 7760305
    Abstract: A liquid crystal display device that includes a plurality of pixels, a first substrate and a second substrate, as well as a liquid crystal layer provided between the first and second substrates. A first alignment structure and a second alignment structure are formed on the first substrate, and a third alignment structure and a fourth alignment structure are formed on the second substrate, for controlling an alignment of the liquid crystal. At least one auxiliary alignment structure is also formed on the first substrate for controlling an alignment of liquid crystals. The first and second alignment structures extend linearly in different directions from each other in a pixel, and the third and fourth alignment structures extend parallel to the first and second alignment structures, respectively. Also, the auxiliary alignment structure extends substantially along an edge of the pixel.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: July 20, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Arihiro Takeda, Katsufumi Ohmuro, Yoshio Koike, Shingo Kataoka, Takahiro Sasaki, Takashi Sasabayashi, Hideaki Tsuda, Hideo Chida, Makoto Ohashi, Kenji Okamoto, Hisashi Yamaguchi, Minoru Otani, Makoto Morishige, Noriaki Furukawa, Tsuyoshi Kamada, Yoshinori Tanaka, Atuyuki Hoshino, Shougo Hayashi, Hideaki Takizawa, Takeshi Kinjou, Makoto Tachibanaki, Keiji Imoto, Tadashi Hasegawa, Hidefumi Yoshida, Hiroyasu Inoue, Yoji Taniguchi, Tetsuya Fujikawa, Satoshi Murata, Manabu Sawasaki, Tomonori Tanose, Siro Hirota, Masahiro Ikeda, Kunihiro Tashiro, Kouji Tsukao, Yasutoshi Tasaka, Takatoshi Mayama, Seiji Tanuma, Yohei Nakanishi
  • Publication number: 20100165259
    Abstract: A liquid crystal display device according to the present invention is constituted of a TFT substrate and an opposing substrate which are arranged so as to be opposite to each other with a liquid crystal layer interposed therebetween. In addition, in the liquid crystal layer, formed is a polymer into which a polymer component added to liquid crystal is polymerized, and which determines directions in which liquid crystal molecules tilt when voltage is applied. In the TFT substrate, formed are a sub picture element electrode directly connected to a TFT and a sub picture element electrode connected to the TFT through capacitive coupling. In each of these sub picture element electrodes, formed are slits extending in directions respectively at angles of 45 degrees, 135 degrees, 225 degrees and 315 degrees to the X axis.
    Type: Application
    Filed: March 15, 2010
    Publication date: July 1, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yohei Nakanishi, Kunihiro Tashiro, Katsufumi Ohmuro, Kazutaka Hanaoka, Jin Hirosawa, Norio Sugiura, Kengo Kanii, Shota Makimoto, Naoto Kondo, Isao Tsushima, Tomonori Tanose, Takashi Takagi, Tetsuya Fujikawa
  • Patent number: 7719502
    Abstract: An MVA liquid crystal display device for displaying motion pictures includes a polymer layer formed on a surface of a vertical alignment film so as to tilt liquid crystal molecules in the liquid crystal layer slightly from a direction perpendicular to the plane of the liquid crystal layer. Further, the MVA liquid crystal display device of such a construction is subjected to overdriving.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: May 18, 2010
    Assignees: Fujitsu Limited, Au Optronics Corporation
    Inventors: Kazutaka Hanaoka, Yohei Nakanishi, Yuichi Inoue, Tsuyoshi Kamada, Keiji Hayashi, Kazuya Ueda
  • Publication number: 20100118010
    Abstract: The invention relates to a liquid crystal display device including a first transistor, a plurality of sub-picture element electrodes formed in a picture element region, a control electrode formed in capacitance coupling with at least one of the plural sub-picture element electrodes, the control electrode being applied with a display voltage from the first transistor, and an auxiliary capacitance bus line held at a predetermined voltage level and constituting an auxiliary capacitance between the auxiliary capacitance bus line and the control electrode. A second transistor is provided between the sub-picture element electrode coupled with the control electrode by the capacitance coupling and the auxiliary capacitance bus line or between the sub-picture element electrode coupled with the control electrode by the capacitance coupling and the sub-picture element electrode connected to the first transistor.
    Type: Application
    Filed: January 15, 2010
    Publication date: May 13, 2010
    Inventors: Masakazu Shibasaki, Yasutoshi Tasaka, Hideaki Tsuda, Yohei Nakanishi, Hidefumi Yoshida, Tsuyoshi Kamada