Patents by Inventor Hisakazu Nakamura

Hisakazu Nakamura 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).

  • Patent number: 7956971
    Abstract: There is provided a CPA-type liquid crystal display device in which deterioration in display quality due to application of stress to a liquid crystal panel is suppressed. A liquid crystal display device according to the present invention includes a first substrate; a second substrate; and a liquid crystal layer of a vertical-alignment type provided therebetween. In each picture element region, a first electrode provided on a side of the first substrate facing the liquid crystal layer includes a solid portion formed of an electrically-conductive film and a non-solid portion in which no electrically-conductive film is formed. The solid portion includes a plurality of unit solid portions each of which is substantially surrounded by the non-solid portion, the plurality of unit solid portions being arranged at least along a first direction.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: June 7, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hisakazu Nakamura, Masumi Kubo
  • Patent number: 7924276
    Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: April 12, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta, Yutaka Kamezaki, Hitoshi Kamezaki, legal representative, Masano Kamezaki, legal representative
  • Publication number: 20100165274
    Abstract: There is provided a CPA-type liquid crystal display device in which deterioration in display quality due to application of stress to a liquid crystal panel is suppressed. A liquid crystal display device according to the present invention includes a first substrate; a second substrate; and a liquid crystal layer of a vertical-alignment type provided therebetween. In each picture element region, a first electrode provided on a side of the first substrate facing the liquid crystal layer includes a solid portion formed of an electrically-conductive film and a non-solid portion in which no electrically-conductive film is formed. The solid portion includes a plurality of unit solid portions each of which is substantially surrounded by the non-solid portion, the plurality of unit solid portions being arranged at least along a first direction.
    Type: Application
    Filed: February 4, 2010
    Publication date: July 1, 2010
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Hisakazu Nakamura, Masumi Kubo
  • Patent number: 7683995
    Abstract: There is provided a CPA-type liquid crystal display device in which deterioration in display quality due to application of stress to a liquid crystal panel is suppressed. A liquid crystal display device according to the present invention includes a first substrate; a second substrate; and a liquid crystal layer of a vertical-alignment type provided therebetween. In each picture element region, a first electrode provided on a side of the first substrate facing the liquid crystal layer includes a solid portion formed of an electrically-conductive film and a non-solid portion in which no electrically-conductive film is formed. The solid portion includes a plurality of unit solid portions each of which is substantially surrounded by the non-solid portion, the plurality of unit solid portions being arranged at least along a first direction.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: March 23, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hisakazu Nakamura, Masumi Kubo
  • Publication number: 20080055218
    Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.
    Type: Application
    Filed: September 11, 2007
    Publication date: March 6, 2008
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta, Yutaka Kamezaki, Hitoshi Kamezaki, Masano Kamezaki
  • Patent number: 7321353
    Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: January 22, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta
  • Publication number: 20080013027
    Abstract: While securing adequate response characteristics and brightness of an orientation-divided vertical alignment type liquid crystal display device, variations in display quality that are ascribable to variations in the pixel structure are suppressed. A liquid crystal display device according to the present invention includes a plurality of pixels each having a first electrode, a second electrode opposing the first electrode, and a vertical-alignment type liquid crystal layer provided between the first electrode and the second electrode, including: a rib provided on the first electrode side of the liquid crystal layer, and a slit provided in the second electrode of the liquid crystal layer. The thickness of the liquid crystal layer is no more than 2.5 ?m, and the width of the rib is no less than 5 ?m and no more than 13 ?m.
    Type: Application
    Filed: October 25, 2005
    Publication date: January 17, 2008
    Inventors: Tadashi Kawamura, Masumi Kubo, Hiroyuki Ohgami, Hisakazu Nakamura, Akihiro Yamamoto, Takashi Ochi, Yohichi Naruse
  • Patent number: 7286108
    Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: October 23, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta
  • Publication number: 20070199504
    Abstract: There is provided a CPA-type liquid crystal display device in which deterioration in display quality due to application of stress to a liquid crystal panel is suppressed. A liquid crystal display device according to the present invention includes a first substrate; a second substrate; and a liquid crystal layer of a vertical-alignment type provided therebetween. In each picture element region, a first electrode provided on a side of the first substrate facing the liquid crystal layer includes a solid portion formed of an electrically-conductive film and a non-solid portion in which no electrically-conductive film is formed. The solid portion includes a plurality of unit solid portions each of which is substantially surrounded by the non-solid portion, the plurality of unit solid portions being arranged at least along a first direction.
    Type: Application
    Filed: May 17, 2005
    Publication date: August 30, 2007
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hisakazu Nakamura, Masumi Kubo
  • Publication number: 20050219453
    Abstract: The liquid crystal display device of the invention includes a plurality of pixels each having a first electrode, a second electrode facing the first electrode, and a vertically aligned liquid crystal layer placed between the first and second electrodes. The device further includes stripe-shaped first alignment regulating means having a first width placed in the first electrode side of the liquid crystal layer; stripe-shaped second alignment regulating means having a second width placed in the second electrode side of the liquid crystal layer; and a stripe-shaped liquid crystal region having a third width defined between the first and second regulating means. The third width is in a range between 2 ?m and 15 ?m.
    Type: Application
    Filed: March 30, 2005
    Publication date: October 6, 2005
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Masumi Kubo, Hisakazu Nakamura, Hiroyuki Ohgami, Akihiro Yamamoto, Tadashi Kawamura, Takashi Ochi, Yohichi Naruse
  • Publication number: 20050219182
    Abstract: The liquid crystal display device of the invention includes a plurality of pixels each having a first electrode, a second electrode facing the first electrode, and a vertically aligned liquid crystal layer placed between the first and second electrodes. The device further includes stripe-shaped first alignment regulating means having a first width placed in the first electrode side of the liquid crystal layer; stripe-shaped second alignment regulating means having a second width placed in the second electrode side of the liquid crystal layer; and a stripe-shaped liquid crystal region having a third width defined between the first and second regulating means. The third width is in a range between 7 ?m and 12 ?m.
    Type: Application
    Filed: March 30, 2005
    Publication date: October 6, 2005
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hisakazu Nakamura, Masumi Kubo, Hiroyuki Ohgami, Tadashi Kawamura, Akihiro Yamamoto, Takashi Ochi, Yohichi Naruse
  • Publication number: 20050140663
    Abstract: An ultrasonic electronic stylus includes at least (i) an ultrasound element for generating ultrasound, (ii) tool force measuring means for measuring a tool force applied to a writing-tip, (iii) a control circuit substrate for controlling the ultrasound element and the tool force measuring means. The ultrasound element, the tool force measuring means, and the control means are arranged in this order from a front-end side on which inputting of data is carried out. Since the ultrasound emitted from the ultrasound element is not blocked by anything, the ultrasound is efficiently transmitted.
    Type: Application
    Filed: December 14, 2004
    Publication date: June 30, 2005
    Inventor: Hisakazu Nakamura
  • Publication number: 20050140632
    Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.
    Type: Application
    Filed: May 14, 2004
    Publication date: June 30, 2005
    Inventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta
  • Patent number: 6822701
    Abstract: A liquid crystal display apparatus has an improved repair success rate. In the liquid crystal display apparatus, a pixel electrode is electrically connected to a drain electrode of a thin-film transistor. The drain electrode has a substantial correction site which is narrowed in width. An opening is formed in a certain region of said pixel electrode, overlying the substantial correction site of the drain electrode, the opening being in contact with the outer periphery of the pixel electrode.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: November 23, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Touko Kasahara, Hiroshi Shimokawa, Katsumi Irie, Hisakazu Nakamura, Kyoushi Tanaka
  • Publication number: 20020180673
    Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.
    Type: Application
    Filed: May 29, 2001
    Publication date: December 5, 2002
    Inventors: Kazuhiho Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta
  • Patent number: 6424399
    Abstract: A reflection type liquid crystal display apparatus includes: a first substrate having a plurality of reflecting electrodes; a second substrate having a light transmitting electrode; and a liquid crystal layer disposed between the first substrate and the second substrate. The first substrate includes an insulating substrate, a switching device provided on the insulating substrate for supplying a display voltage signal to the reflecting electrode, a drawing-out electrode connected to the switching device and extending under the reflecting electrode, and an insulating resin layer having a contact hole on the drawing-out electrode. The reflecting electrode is provided on the insulating resin layer, corresponding to each pixel, so as to cover the contact hole, and is electrically connected to the drawing-out electrode at the bottom of the contact hole.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: July 23, 2002
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasunori Shimada, Hisakazu Nakamura, Koji Taniguchi
  • Patent number: 5973843
    Abstract: A reflector has a plurality of convex/concave portions on a surface of a substrate, Each of the convex/concave portions has a circular or elliptical shape as viewed in a direction perpendicular to the surface of the substrate. The surface of the substrate includes first and second regions adjacent to each other defining a boundary therebetween. In each of the first and second regions, an ellipticity .alpha. of the shape of the convex/concave portions continuously changes away from a respective predetermined central position. The ellipticity .alpha. is about 1.05+(0.005/3)-.beta. or less, where .beta.=.vertline..theta.-90.vertline., and .theta. denotes an angle between long axes of the elliptical shapes of the convex/concave portions on opposite sides of the boundary.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: October 26, 1999
    Inventor: Hisakazu Nakamura
  • Patent number: 5949507
    Abstract: A reflection type liquid crystal display apparatus includes: a first substrate having a plurality of reflecting electrodes; a second substrate having a light transmitting electrode; and a liquid crystal layer disposed between the first substrate and the second substrate. The first substrate includes an insulating substrate, a switching device provided on the insulating substrate for supplying a display voltage signal to the reflecting electrode, a drawing-out electrode connected to the switching device and extending under the reflecting electrode, and an insulating resin layer having a contact hole on the drawing-out electrode. The reflecting electrode is provided on the insulating resin layer, corresponding to each pixel, so as to cover the contact hole, and is electrically connected to the drawing-out electrode at the bottom of the contact hole.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: September 7, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasunori Shimada, Hisakazu Nakamura, Koji Taniguchi
  • Patent number: 5691791
    Abstract: A reflective liquid crystal display device including a first substrate and a second substrate, a liquid crystal layer interposed between the first and second substrates, a polarizing plate, and a reflection layer; wherein the polarizing plate and the reflection layer are located on opposite sides of the liquid crystal layer. A surface of the reflection layer reflecting light has projections, and an occupation of an area of portions where a tilt angle of a tangent line drawn against a profile of the surface with the projections is less than 2.degree. in a total area of the surface is in a range of 20% to 60%.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: November 25, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kozo Nakamura, Hisakazu Nakamura, Seiichi Mitsui, Naofumi Kimura, Kazuhiko Tsuda
  • Patent number: 5418635
    Abstract: A reflective substrate is provided, in which an electrode made of a material having an optical reflecting function is provided above an insulating base substrate and an upper surface of the electrode has a continuous wave shape without any flat portions. A method for manufacturing the reflective substrate includes the steps of: forming a plurality of convex portions with two or more different heights in a region where the electrode is provided; forming a polymer resin film, which has an upper surface in a continuous wave shape without any flat portions, on the substrate with the convex portions; and forming the electrode made of a material having an optical reflecting function on the polymer resin film so that the electrode has a continuous wave shape.
    Type: Grant
    Filed: February 18, 1993
    Date of Patent: May 23, 1995
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Seiichi Mitsui, Hisakazu Nakamura, Yasunori Shimada, Koji Taniguchi, Hirohisa Tanaka, Naofumi Kimura