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).

  • Liquid crystal display device
    Publication number: 20080225223
    Abstract: There is provided a liquid crystal display device in which light leaks near spacers are prevented. The liquid crystal display device controls the optical transmissivity of a liquid crystal layer interposed between substrates disposed in opposition to each other, by means of an electric field generated in the layer-thickness direction of the liquid crystal layer, includes spacers formed on a liquid-crystal-side surface of one of the substrates, signal lines formed on a liquid-crystal-side surface of the other substrate, an insulating film formed to cover the signal lines, and electrodes formed on the upper surface of the insulating film, each of which serves as one electrode contributing to control of the optical transmissivity of the liquid crystal layer.
    Type: Application
    Filed: April 15, 2008
    Publication date: September 18, 2008
    Inventors: Kazuhiko Yanagawa, Yasushi Iwakabe, Yoshiaki Nakayoshi, Masatoshi Wakagi
  • DISPLAY DEVICE
    Publication number: 20080225191
    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: January 15, 2008
    Publication date: September 18, 2008
    Inventors: Ken Ohara, Tsunenori Yamamoto, Yoshiaki Nakayoshi, Hiroshi Saito, Jun Ooida
  • Liquid crystal display device with two capacitive electrode layers in specific locations
    Patent number: 7423701
    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: Grant
    Filed: August 26, 2005
    Date of Patent: September 9, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa
  • Display device and manufacturing method thereof
    Publication number: 20080212010
    Abstract: The present invention provides a liquid crystal display device which can easily prevent the generation of longitudinal smear. The display device includes a display panel having a plurality of scanning signal lines, a plurality of video signal lines, a plurality of thin film transistors and a plurality of pixel electrodes arranged in a matrix array. In a state that a gap between two neighboring video signal lines with one pixel electrode out of the plurality of pixel electrodes sandwiched therebetween in a region where one pixel electrode is arranged is larger than a gap between two neighboring video signal lines with another pixel electrode different from one pixel electrode sandwiched therebetween in a region where another electrode is arranged, a size of one pixel electrode is set larger than a size of another pixel electrode.
    Type: Application
    Filed: February 26, 2008
    Publication date: September 4, 2008
    Inventors: Ken Ohara, Tsunenori Yamamoto, Yoshiaki Nakayoshi, Hiroshi Saito, Jun Ooida
  • Liquid crystal display device
    Patent number: 7388643
    Abstract: A liquid crystal display device has a pair of substrates disposed in opposition to one another with a liquid crystal interposed therebetween, active elements formed on one of the pair of substrates, an organic film layer formed to cover the active elements, a light-shielding film formed on another of the pair of substrates, and a sealing material which sticks the pair of substrates together. In the liquid crystal display device, the sealing material has an injecting port formed therein and sealed with an end-sealing material and spaced apart, and the light-shielding layer and the organic film layer are formed to be extended outward from the sealing material, and the organic film layer is at least partly removed at the injecting port.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: June 17, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Yoshiaki Nakayoshi, Nagatoshi Kurahashi, Kazuhiko Yanagawa
  • Liquid crystal display device
    Patent number: 7382432
    Abstract: There is provided a liquid crystal display device in which light leaks near spacers are prevented. The liquid crystal display device controls the optical transmissivity of a liquid crystal layer interposed between substrates disposed in opposition to each other, by means of an electric field generated in the layer-thickness direction of the liquid crystal layer, includes spacers formed on a liquid-crystal-side surface of one of the substrates, signal lines formed on a liquid-crystal-side surface of the other substrate, an insulating film formed to cover the signal lines, and electrodes formed on the upper surface of the insulating film, each of which serves as one electrode contributing to control of the optical transmissivity of the liquid crystal layer.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: June 3, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Yanagawa, Yasushi Iwakabe, Yoshiaki Nakayoshi, Masatoshi Wakagi
  • Liquid crystal display device and method of making same
    Patent number: 7375786
    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: January 25, 2006
    Date of Patent: May 20, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Kikuo Ono, Masahiro Tanaka, Yoshiaki Nakayoshi, Nobuyuki Suzuki
  • Liquid crystal display device
    Patent number: 7365725
    Abstract: In a liquid crystal display device, drain signal lines which supply the video signal are arranged to cross gate signal lines which supply the scanning signal and counter voltage signal lines which supply the reference signal. The reference signal is supplied to the pixels for every selected pixel row. Further, the counter voltage signal lines in other pixel rows except for the selected pixel rows are respectively configured to assume a floating state.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: April 29, 2008
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yoshiaki Nakayoshi, Yoshihiro Imajo, Kazuhiko Yanagawa
  • Liquid crystal display device
    Publication number: 20080084527
    Abstract: There is provided a liquid crystal display device in which light leaks near spacers are prevented. The liquid crystal display device controls the optical transmissivity of a liquid crystal layer interposed between substrates disposed in opposition to each other, by means of an electric field generated in the layer-thickness direction of the liquid crystal layer, includes spacers formed on a liquid-crystal-side surface of one of the substrates, signal lines formed on a liquid-crystal-side surface of the other substrate, an insulating film formed to cover the signal lines, and electrodes formed on the upper surface of the insulating film, each of which serves as one electrode contributing to control of the optical transmissivity of the liquid crystal layer.
    Type: Application
    Filed: November 19, 2007
    Publication date: April 10, 2008
    Inventors: Kazuhiko Yanagawa, Yasushi Iwakabe, Yoshiaki Nakayoshi, Masatoshi Wakagi
  • Liquid crystal display device
    Publication number: 20080074604
    Abstract: There is provided a liquid crystal display device in which light leaks near spacers are prevented. The liquid crystal display device controls the optical transmissivity of a liquid crystal layer interposed between substrates disposed in opposition to each other, by means of an electric field generated in the layer-thickness direction of the liquid crystal layer, includes spacers formed on a liquid-crystal-side surface of one of the substrates, signal lines formed on a liquid-crystal-side surface of the other substrate, an insulating film formed to cover the signal lines, and electrodes formed on the upper surface of the insulating film, each of which serves as one electrode contributing to control of the optical transmissivity of the liquid crystal layer.
    Type: Application
    Filed: November 7, 2007
    Publication date: March 27, 2008
    Inventors: Kazuhiko Yanagawa, Yasushi Iwakabe, Yoshiaki Nakayoshi, Masatoshi Wakagi
  • Liquid crystal display device, display device and manufacturing method thereof
    Publication number: 20080074570
    Abstract: Image display device having an electrode forming layer which includes a plurality of 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 insulted by insulating layer.
    Type: Application
    Filed: October 29, 2007
    Publication date: March 27, 2008
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa
  • DISPLAY DEVICE
    Publication number: 20080067513
    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: October 30, 2007
    Publication date: March 20, 2008
    Inventors: Kikuo ONO, Masahiro Tanaka, Yoshiaki Nakayoshi, Nobuyuki Suzuki
  • DISPLAY DEVICE
    Publication number: 20080068526
    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: October 30, 2007
    Publication date: March 20, 2008
    Inventors: Kikuo Ono, Masahiro Tanaka, Yoshiaki Nakayoshi, Nobuyuki Suzuki
  • Liquid Crystal Display Device
    Publication number: 20080062371
    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 areas defined by the drain signal lines and the gate signal lines. The pixel areas includes a pixel electrode formed of a transparent electrode having a plurality of slits including a slit opened in a first direction and a slit opened in a second direction, and a counter electrode formed of a transparent electrode disposed between the transparent electrode of the pixel electrode having the plurality of slits and the one substrate.
    Type: Application
    Filed: October 26, 2007
    Publication date: March 13, 2008
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Liquid crystal display
    Publication number: 20080057607
    Abstract: There is provided a liquid crystal display device in which the wiring resistivity of signal lines is reduced. The liquid crystal display device includes substrates disposed in opposition to each other with a liquid crystal interposed therebetween, a thin film transistor to be driven by a scanning signal supplied from a gate signal line, and a pixel electrode to be supplied with a video signal from a drain signal line via the thin film transistor, the thin film transistor and the pixel being provided in each pixel area on a liquid-crystal-side surface of one of the substrates. The gate signal line is made of a multi-layered structure including at least an ITO film formed on the liquid-crystal-side surface and a Mo layer formed to overlie the ITO film.
    Type: Application
    Filed: October 17, 2007
    Publication date: March 6, 2008
    Inventors: Ryuutarou Oke, Yoshiaki Nakayoshi, Kikuo Ono
  • Liquid crystal display
    Publication number: 20080057606
    Abstract: There is provided a liquid crystal display device in which the wiring resistivity of signal lines is reduced. The liquid crystal display device includes substrates disposed in opposition to each other with a liquid crystal interposed therebetween, a thin film transistor to be driven by a scanning signal supplied from a gate signal line, and a pixel electrode to be supplied with a video signal from a drain signal line via the thin film transistor, the thin film transistor and the pixel being provided in each pixel area on a liquid-crystal-side surface of one of the substrates. The gate signal line is made of a multi-layered structure including at least an ITO film formed on the liquid-crystal-side surface and a Mo layer formed to overlie the ITO film.
    Type: Application
    Filed: October 17, 2007
    Publication date: March 6, 2008
    Inventors: Ryuutarou Oke, Yoshiaki Nakayoshi, Kikuo Ono
  • DISPLAY DEVICE
    Publication number: 20080048934
    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: August 8, 2007
    Publication date: February 28, 2008
    Inventors: TSUNENORI YAMAMOTO, Ken Ohara, Yoshiaki Nakayoshi, Susumu Edo, Hiroshi Saito
  • Manufacturing method of display device and exposure system for that
    Publication number: 20080036987
    Abstract: An object of the present invention is to readily minimize inhomogeneity in image quality in a display field on one liquid crystal display panel.
    Type: Application
    Filed: July 24, 2007
    Publication date: February 14, 2008
    Inventors: Yoshiaki Nakayoshi, Takahiro Miyazaki, Jun Ooida, Ken Ohara
  • Liquid Crystal Display Device
    Publication number: 20080013028
    Abstract: A liquid crystal display device includes first and second substrates with a liquid crystal layer therebetween, a plurality of gate signal lines made of metal and a plurality of drain signal lines made of metal, wherein the gate signal line and the drain signal line have a first overlapping region, and a plurality of counter voltage signal lines, wherein the counter voltage signal line and the drain signal line have a second overlapping region. A plurality of pixel regions are defined by neighboring gate signal lines and drain signal lines, and a pixel electrode is formed on the first substrate in each pixel region. A thin film transistor having a semiconductor layer is formed on the gate signal line, and the semiconductor layer at least overlaps with the drain signal line at the first overlapping region and the second overlapping region.
    Type: Application
    Filed: July 18, 2007
    Publication date: January 17, 2008
    Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
  • Liquid crystal display device, image display device and manufacturing method thereof
    Patent number: 7307673
    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: Grant
    Filed: April 24, 2006
    Date of Patent: December 11, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa