Patents by Inventor Yoshiaki Nakayoshi

Yoshiaki Nakayoshi 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: 20120019747
    Abstract: Image display device having an electrode forming layer which includes a plurality of gate lines, a plurality of drain lines, a plurality of switching elements and the a plurality of pixel electrodes, and having reference electrode layer between the electrode forming layer and a substrate where the electrode forming layer formed thereon, and the reference electrode layer and the electrode forming layer are insulated by insulating layer.
    Type: Application
    Filed: December 7, 2010
    Publication date: January 26, 2012
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa
  • Publication number: 20120002152
    Abstract: A display device includes a plurality of pixel regions each of which is surrounded by a pair of gate signal lines and a pair of the drain signal lines. Each of the pixel regions includes a first electrode and a second electrode formed on one substrate and each of the pixel regions is constituted of a first region and a second region which are arranged in a direction in which the pair of the drain signal lines extend. In the pixel region, the first electrode is formed in a planar shape and below an insulation film, and the second electrode has a plurality of linear parts which extend linearly and are arranged with respect to each other and is formed above the insulation film.
    Type: Application
    Filed: September 13, 2011
    Publication date: January 5, 2012
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa, Takahiro Ochiai, Hirotaka Imayama
  • Publication number: 20120001835
    Abstract: In a display device of built-in driver circuit type including a non-rectangular image display area, the frame area surrounding the display area is reduced and the wiring delay is reduced. The image display device includes a plurality of pixels arranged in an orthogonal matrix form, a plurality of scanning wiring lines connected to the plural pixels, a plurality of signal wiring lines connected to the plural pixels, the signal wiring lines being disposed to construct an orthogonal matrix form with the plural scanning wiring lines; signal wiring internal circuits for driving the plural signal wiring lines, and an image display area including a plurality of pixels, the image display area having a non-rectangular outer contour. The signal wiring internal circuits are separated from each other in an extending direction of the signal wiring lines in a unit of length of the pixel.
    Type: Application
    Filed: September 12, 2011
    Publication date: January 5, 2012
    Inventors: Tsunenori YAMAMOTO, Ken Ohara, Yoshiaki Nakayoshi, Susumu Edo, Hiroshi Saito
  • Publication number: 20120002151
    Abstract: A liquid crystal display includes a pair of transparent substrates opposed to each other with liquid crystal therebetween, one of the pair of transparent substrates having a plurality of drain signal lines and a plurality of gate signal lines, and a plurality of pixel regions defined by the drain signal lines and the gate signal lines. The pixel region has a TFT element, a first electrode formed of a transparent electrode having a plurality of slits, a connection area that connects the first electrode to the TFT element, and a second electrode formed of a transparent electrode. The second electrode is disposed between the first electrode and the one of the pair of transparent substrates, the second electrode is connected with the second electrode of an adjacent pixel region, and the connected second electrode is arranged at a position overlapping with the gate signal line.
    Type: Application
    Filed: September 13, 2011
    Publication date: January 5, 2012
    Inventors: Kikuo ONO, Makoto YONEYA, Tsunenori YAMAMOTO, Junichi HIRAKATA, Yoshiaki NAKAYOSHI
  • Publication number: 20120002150
    Abstract: A liquid crystal display includes first and second substrates opposed to each other with liquid crystal therebetween, the first substrate having a plurality of drain signal lines and gate signal lines, and a plurality of pixel regions defined by the drain signal lines and the gate signal lines. The pixel region has a first electrode formed of a transparent conducting layer having a plurality of slits, a second electrode formed of a transparent conducting layer, and an insulating layer interposed between the first electrode and the second electrode. The second electrode is overlapped with a plurality of the slits of the first electrode in the pixel region, the first electrode is overlapped with the drain signal line and the gate signal line, and at least one of the first electrode and the second electrode is formed between the first substrate and the liquid crystal layer in the pixel region.
    Type: Application
    Filed: September 13, 2011
    Publication date: January 5, 2012
    Inventors: Kikuo ONO, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Patent number: 8045116
    Abstract: A liquid crystal display includes a pair of transparent substrates opposed to each other with liquid crystal therebetween, and one of the substrates has a plurality of drain signal lines, gate signal lines, and pixel regions defined by the drain signal lines and the gate signal lines. The pixel regions include a semiconductor region which constitutes a channel of a TFT element, a first electrode formed of a transparent electrode, and a second electrode formed of a transparent electrode. The second electrode is disposed between the first electrode and the one of the substrates, the second electrode is overlapped with the first electrode in the pixel region, the second electrode is overlapped with the gate signal line, and the second electrode is connected with the second electrode of an adjacent pixel region. The second electrode is not formed at a position on the TFT element.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: October 25, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Patent number: 8035786
    Abstract: A liquid crystal display includes a pair of transparent substrates opposed to each other with liquid crystal therebetween, and one of the substrates has a plurality of drain signal lines, gate signal lines, and pixel regions defined by the drain signal lines and the gate signal lines. The pixel regions include a TFT element, a first electrode formed of a transparent electrode, a second electrode formed of a transparent electrode. The second electrode is disposed between the first electrode and the one of the substrates, the second electrode is overlapped with the first electrode in the pixel region, is overlapped with the gate signal line, and is connected with the second electrode of an adjacent pixel region. A metal line is arranged for a plurality of the pixel regions, is overlapped with the second electrode, and is connected to the second electrode electrically.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: October 11, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Patent number: 8023087
    Abstract: In a display device of built-in driver circuit type including a non-rectangular image display area, the frame area surrounding the display area is reduced and the wiring delay is reduced. The image display device includes a plurality of pixels arranged in an orthogonal matrix form, a plurality of scanning wiring lines connected to the plural pixels, a plurality of signal wiring lines connected to the plural pixels, the signal wiring lines being disposed to construct an orthogonal matrix form with the plural scanning wiring lines; signal wiring internal circuits for driving the plural signal wiring lines, and an image display area including a plurality of pixels, the image display area having a non-rectangular outer contour. The signal wiring internal circuits are separated from each other in an extending direction of the signal wiring lines in a unit of length of the pixel.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: September 20, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Tsunenori Yamamoto, Ken Ohara, Yoshiaki Nakayoshi, Susumu Edo, Hiroshi Saito
  • Publication number: 20110211150
    Abstract: A display device includes a pair of substrates with liquid crystal therebetween, and a plurality of pixel regions provided on one substrate. Each pixel region is constituted of one and another region including a switching element, a pixel electrode, and a counter electrode. In the one region, the counter electrode extends substantially planar at a center except at a periphery of the one region, and the pixel electrode is constituted of a first group of electrodes which extend in one direction and arranged in parallel at a first distance. In the another region the counter electrode is constituted of a group of electrodes which extend in one direction and arranged in parallel in a direction which intersects the one direction in the another region, and the pixel electrode is constituted of a second group of electrodes which extend in the one direction and arranged in parallel at a second distance.
    Type: Application
    Filed: May 10, 2011
    Publication date: September 1, 2011
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa, Takahiro Ochiai, Hirotaka Imayama
  • Publication number: 20110199552
    Abstract: A liquid crystal display includes a pair of transparent substrates opposed to each other with liquid crystal therebetween, and one of the substrates has a plurality of drain signal lines, gate signal lines, and pixel regions defined by the drain signal lines and the gate signal lines. The pixel regions include a TFT element, a first electrode formed of a transparent electrode, a second electrode formed of a transparent electrode. The second electrode is disposed between the first electrode and the one of the substrates, the second electrode is overlapped with the first electrode in the pixel region, is overlapped with the gate signal line, and is connected with the second electrode of an adjacent pixel region. A metal line is arranged for a plurality of the pixel regions, is overlapped with the second electrode, and is connected to the second electrode electrically.
    Type: Application
    Filed: April 26, 2011
    Publication date: August 18, 2011
    Inventors: Kikuo ONO, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Publication number: 20110199553
    Abstract: A liquid crystal display includes a pair of transparent substrates opposed to each other with liquid crystal therebetween, and one of the substrates has a plurality of drain signal lines, gate signal lines, and pixel regions defined by the drain signal lines and the gate signal lines. The pixel regions include a semiconductor region which constitutes a channel of a TFT element, a first electrode formed of a transparent electrode, and a second electrode formed of a transparent electrode. The second electrode is disposed between the first electrode and the one of the substrates, the second electrode is overlapped with the first electrode in the pixel region, the second electrode is overlapped with the gate signal line, and the second electrode is connected with the second electrode of an adjacent pixel region. The second electrode is not formed at a position on the TFT element.
    Type: Application
    Filed: April 26, 2011
    Publication date: August 18, 2011
    Inventors: Kikuo ONO, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Publication number: 20110157508
    Abstract: A display device which can reduce easily the brightness unevenness produced by the insufficient writing of TFT, wherein, the display device having: a display panel which, over a surface of an insulating substrate, includes plural scanning signal lines; plural picture signal lines; plural TFTs; plural pixel electrodes coupled to sources of the TFTs; and a counter electrode, wherein the pixel and counter electrodes are arranged over the same surface of an insulating layer overlying the surface of the insulating substrate, and when a gate insulating film provided at one TFT among the TFTs is thinner than a gate insulating film provided at another TFT among the TFTs, a gap between a pixel electrode coupled to the source of the one TFT and the counter electrode is set to be wider than a gap between a pixel electrode coupled to the source of the another TFT and the counter electrode.
    Type: Application
    Filed: March 8, 2011
    Publication date: June 30, 2011
    Inventors: Ken Ohara, Tsunenori Yamamoto, Yoshiaki Nakayoshi, Hiroshi Saito, Jun Ooida
  • Publication number: 20110149188
    Abstract: A display device includes a substrate, a gate line formed over the substrate, a first insulating film formed over the substrate and the gate line, a semiconductor film formed over the first insulating film, a drain electrode formed over the semiconductor film, a source electrode formed over the semiconductor film, a data line connected to the drain electrode and formed over the first insulating film, a second insulating film formed over the source electrode and the data line, a pixel electrode electrically connected to the source electrode and formed over the second insulating film, and a transparent conductive film connected to the data line through a contact hole formed in the second insulating film. The transparent conductive film includes a first portion which none of the first insulating film and the second insulating film underlie.
    Type: Application
    Filed: March 1, 2011
    Publication date: June 23, 2011
    Inventors: Kikuo ONO, Masahiro Tanaka, Yoshiaki Nakayoshi, Nobuyuki Suzuki
  • Patent number: 7952673
    Abstract: The present invention provides a liquid crystal display device which exhibits the excellent wide viewing angle characteristic and the high-speed responsiveness. A pixel region includes a switching element which is operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal from a drain signal line is supplied through a switching element, and a counter electrode which generates an electric field between the counter electrode and the pixel electrode. The pixel region is constituted of divided respective regions.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: May 31, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa, Takahiro Ochiai, Hirotaka Imayama
  • Patent number: 7944514
    Abstract: The present invention allows decreasing the uneven image quality in a liquid crystal display device. The display device in accordance with the present invention includes plural scan signal lines, plural video signal lines, plural TFTs placed in a matrix structure, and plural pixel electrodes, when the width of the scan signal line in a region to place one TFT is different from the width of the scan signal line in a region to place another TFT which is different from the one TFT, the channel width and the channel length of the one TFT is almost equal to the channel width and the channel length of the another TFT, and the surface area of the region overlapping the source electrode with the scan signal line of the one TFT when viewing in plan view is almost equal to the surface area of the region overlapping the source electrode with the scan signal line of the another TFT when viewing in plan view.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: May 17, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Ken Ohara, Yoshiaki Nakayoshi, Tsunenori Yamamoto, Susumu Edo
  • Patent number: 7936429
    Abstract: A liquid crystal display includes a pair of transparent substrates opposed to each other with liquid crystal therebetween. One of the pair of transparent substrates has a plurality of drain signal lines and a plurality of gate signal lines, and a plurality of pixel regions defined by the drain signal lines and the gate signal lines. The pixel regions have a TFT element, a pixel electrode formed of a transparent electrode having a plurality of slits, and a counter electrode formed of a transparent electrode. The counter electrode is disposed between the pixel electrode and the one of the pair of transparent substrates in overlapping relationship with the transparent electrode of the pixel electrode and the gate signal line, and the counter electrode is connected with the counter electrode of an adjacent pixel region.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: May 3, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Patent number: 7924384
    Abstract: The present invention provides a liquid crystal display device which exhibits the excellent wide viewing angle characteristic and the high-speed responsiveness. A pixel region includes a switching element which is operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal from a drain signal line is supplied through a switching element, and a counter electrode which generates an electric field between the counter electrode and the pixel electrode. The pixel region is constituted of divided respective regions.
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: April 12, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa, Takahiro Ochiai, Hirotaka Imayama
  • Patent number: 7916231
    Abstract: A display device comprising a plurality of scan signal lines; a plurality of picture signal lines three-dimensionally intersecting the plurality of scan signal lines; and numerous TFT elements arranged in a matrix; and having a display panel in which each of the TFT elements has a gate connected to one of the plurality of scan signal lines, and a drain or source connected to one of the plurality of picture signal lines; wherein the TFT elements respectively differ in terms of channel width, channel length, or both, depending on a distance from a signal input terminal of the scan signal line to which the gate is connected and a distance from a signal input terminal of the picture signal line to which one of the drain and the source is connected.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: March 29, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Jun Ooida, Takahiro Miyazaki, Ken Ohara, Hiroshi Saito, Yoshiaki Nakayoshi
  • Patent number: 7907225
    Abstract: A display device includes a substrate, a gate line formed over the substrate, a first insulating film formed over the substrate and the gate line, a semiconductor film formed over the first insulating film, a drain electrode formed over the semiconductor film, a source electrode formed over the semiconductor film, a data line connected to the drain electrode and formed over the first insulating film, a second insulating film formed over the source electrode and the data line, a pixel electrode electrically connected to the source electrode and formed over the second insulating film, and a transparent conductive film connected to the data line through a contact hole formed in the second insulating film. The transparent conductive film includes a first portion which none of the first insulating film and the second insulating film underlie.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: March 15, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kikuo Ono, Masahiro Tanaka, Yoshiaki Nakayoshi, Nobuyuki Suzuki
  • Patent number: 7903218
    Abstract: A display device which can reduce easily the brightness unevenness produced by the insufficient writing of TFT, wherein, the display device having: a display panel which, over a surface of an insulating substrate, includes plural scanning signal lines; plural picture signal lines; plural TFTs; plural pixel electrodes coupled to sources of the TFTs; and a counter electrode, wherein the pixel and counter electrodes are arranged over the same surface of an insulating layer overlying the surface of the insulating substrate, and when a gate insulating film provided at one TFT among the TFTs is thinner than a gate insulating film provided at another TFT among the TFTs, a gap between a pixel electrode coupled to the source of the one TFT and the counter electrode is set to be wider than a gap between a pixel electrode coupled to the source of the another TFT and the counter electrode.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: March 8, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Ken Ohara, Tsunenori Yamamoto, Yoshiaki Nakayoshi, Hiroshi Saito, Jun Ooida