Patents by Inventor Kouji Hayakawa

Kouji Hayakawa 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: 9239644
    Abstract: In a liquid crystal display device, a second substrate has detection electrodes of a touch panel, each of pixels has a pixel electrode and a counter electrode divided into a plurality of blocks. The counter electrodes of the respective blocks are commonly provided for the respective pixels of plural continuous display lines, the counter electrodes of the respective blocks double scanning electrodes of the touch panel, and a driver circuit that applies a counter voltage and a touch panel scanning voltage to the counter electrodes of the respective blocks is provided. The driver circuit sequentially applies the touch panel scanning voltage to the counter electrodes of the respective blocks in plural times, while a drive pulse for displaying an image on a liquid crystal display panel is not varied, and drive frequencies of the respective touch panel scanning voltages are different from each other.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: January 19, 2016
    Assignee: Japan Display Inc.
    Inventors: Koji Doi, Kouji Hayakawa
  • Publication number: 20150199060
    Abstract: In a liquid crystal display device, a second substrate has detection electrodes of a touch panel, each of pixels has a pixel electrode and a counter electrode divided into a plurality of blocks. The counter electrodes of the respective blocks are commonly provided for the respective pixels of plural continuous display lines, the counter electrodes of the respective blocks double scanning electrodes of the touch panel, and a driver circuit that applies a counter voltage and a touch panel scanning voltage to the counter electrodes of the respective blocks is provided. The driver circuit sequentially applies the touch panel scanning voltage to the counter electrodes of the respective blocks in plural times, while a drive pulse for displaying an image on a liquid crystal display panel is not varied, and drive frequencies of the respective touch panel scanning voltages are different from each other.
    Type: Application
    Filed: March 27, 2015
    Publication date: July 16, 2015
    Inventors: Koji DOI, Kouji HAYAKAWA
  • Patent number: 9019196
    Abstract: In a liquid crystal display device, a second substrate has detection electrodes of a touch panel, each of pixels has a pixel electrode and a counter electrode divided into a plurality of blocks. The counter electrodes of the respective blocks are commonly provided for the respective pixels of plural continuous display lines, the counter electrodes of the respective blocks double scanning electrodes of the touch panel, and a driver circuit that applies a counter voltage and a touch panel scanning voltage to the counter electrodes of the respective blocks is provided. The driver circuit sequentially applies the touch panel scanning voltage to the counter electrodes of the respective blocks in plural times, while a drive pulse for displaying an image on a liquid crystal display panel is not varied, and drive frequencies of the respective touch panel scanning voltages are different from each other.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: April 28, 2015
    Assignee: Japan Display Inc.
    Inventors: Koji Doi, Kouji Hayakawa
  • Patent number: 8736576
    Abstract: The present invention provides a display device having a touch panel including: a display panel; a capacitance-type touch panel arranged on the display panel; and a front panel arranged on the capacitance-type touch panel, wherein the capacitance-type touch panel includes a plurality of X-electrodes and Y-electrodes, the capacitance-type touch panel and the front panel are attached to each other at peripheral portions of the capacitance-type touch panel using adhesives, a conductive film that is provided so as to surround an effective touch area of the capacitance-type touch panel is provided on the uppermost layer of the capacitance-type touch panel, predetermined electric potential is supplied to the conductive film, and the conductive film overlaps peripheral portions of the effective touch area of the capacitance-type touch panel in planar view.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: May 27, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Kouji Hayakawa
  • Patent number: 8537136
    Abstract: Provided is an electrostatic capacity type touch panel, which responds to not only an input by a finger but also a touch by a nonconductive input member. Disposed are X electrodes XP and Y electrodes YP that cross each other via a first insulating layer 2, and a Z electrode formed of a transparent elastic conductive resin layer 4 via a second insulating layer 3. The transparent elastic conductive resin layer 4 is a high polymer elastic resin layer in which conductive fine particles are dispersed, and is made of a material in which density of the conductive fine particles is increased by pressure of a touch.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: September 17, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Shinji Sekiguchi, Koji Nagata, Kouji Hayakawa
  • Patent number: 8487901
    Abstract: The display device is provided with X electrodes XP and Y electrodes YP which cross with a first insulating layer in between and a number of Z electrodes which are electrically floating from each other with a second insulating layer in between. The Z electrodes are arranged so that each Z electrode overlaps both an adjacent X electrode and Y electrode. The pad portion of a first X electrode has such a form that the area is maximum in the vicinity of the fine wire portion of the first X electrode and the area is minimum in the vicinity of the fine wire portion of an adjacent second X electrode, and the area of the pad portion is smaller towards the direction in which the distance increases away from the vicinity of the fine wire portion of the first X electrode. A pulse signal is sequentially applied to one set of X electrodes or Y electrodes.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: July 16, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kouji Hayakawa, Koji Nagata, Norio Mamba, Toshiyuki Kumagai, Shinji Sekiguchi, Kouichi Anno, Tsutomu Furuhashi
  • Publication number: 20120092292
    Abstract: The present invention provides a display device having a touch panel including: a display panel; a capacitance-type touch panel arranged on the display panel; and a front panel arranged on the capacitance-type touch panel, wherein the capacitance-type touch panel includes a plurality of X-electrodes and Y-electrodes, the capacitance-type touch panel and the front panel are attached to each other at peripheral portions of the capacitance-type touch panel using adhesives, a conductive film that is provided so as to surround an effective touch area of the capacitance-type touch panel is provided on the uppermost layer of the capacitance-type touch panel, predetermined electric potential is supplied to the conductive film, and the conductive film overlaps peripheral portions of the effective touch area of the capacitance-type touch panel in planar view.
    Type: Application
    Filed: October 11, 2011
    Publication date: April 19, 2012
    Inventor: Kouji HAYAKAWA
  • Patent number: 8023082
    Abstract: A liquid crystal display device includes: a first substrate; a second substrate which is placed nearer to a viewer than the first substrate, and which faces a viewer side of the first substrate; a liquid crystal sandwiched between the first substrate and the second substrate; an upper polarization plate which is placed nearer to the viewer than the second substrate, and which faces a viewer side of the second substrate; and a transparent resin plate which is placed nearer to the viewer than the upper polarization plate, and which is attached to a viewer side of the upper polarization plate with one of an adhesive material and a bonding material, the transparent resin plate includes a transparent oxide film on a face that faces the upper polarization plate, and the transparent resin plate is in close contact with the adhesive material or the bonding material through the transparent oxide film.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: September 20, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Koichi Fukuda, Tetsuya Oshima, Satoru Kawasaki, Tsutomu Sato, Kouji Hayakawa
  • Publication number: 20100271328
    Abstract: An electrostatic capacitive coupling-type touch panel is provided which interacts not only with a finger-based input but also with a touch using non-conductive input means. The touch panel includes coordinate detection electrodes for detecting XY position coordinates and transparent Z electrodes. The Z electrodes are arranged over the coordinate detection electrodes at certain intervals with spacers disposed therebetween. An elastic layer that is deformed along the shape of the spacers by compressive force resulting from touch pressing presses the Z electrodes.
    Type: Application
    Filed: April 16, 2010
    Publication date: October 28, 2010
    Inventors: Shinji SEKIGUCHI, Koji Nagata, Kouji Hayakawa, Norio Mamba
  • Publication number: 20100265212
    Abstract: Provided is an electrostatic capacity type touch panel, which responds to not only an input by a finger but also a touch by a nonconductive input member. Disposed are X electrodes XP and Y electrodes YP that cross each other via a first insulating layer 2, and a Z electrode formed of a transparent elastic conductive resin layer 4 via a second insulating layer 3. The transparent elastic conductive resin layer 4 is a high polymer elastic resin layer in which conductive fine particles are dispersed, and is made of a material in which density of the conductive fine particles is increased by pressure of a touch.
    Type: Application
    Filed: April 16, 2010
    Publication date: October 21, 2010
    Inventors: Shinji Sekiguchi, Koji Nagata, Kouji Hayakawa
  • Publication number: 20100134440
    Abstract: The display device is provided with X electrodes XP and Y electrodes YP which cross with a first insulating layer in between and a number of Z electrodes which are electrically floating from each other with a second insulating layer in between. The Z electrodes are arranged so that each Z electrode overlaps both an adjacent X electrode and Y electrode. The pad portion of a first X electrode has such a form that the area is maximum in the vicinity of the fine wire portion of the first X electrode and the area is minimum in the vicinity of the fine wire portion of an adjacent second X electrode, and the area of the pad portion is smaller towards the direction in which the distance increases away from the vicinity of the fine wire portion of the first X electrode. A pulse signal is sequentially applied to one set of X electrodes or Y electrodes.
    Type: Application
    Filed: November 24, 2009
    Publication date: June 3, 2010
    Inventors: Kouji HAYAKAWA, Koji NAGATA, Norio MAMBA, Toshiyuki KUMAGAI, Shinji SEKIGUCHI, Kouichi ANNO, Tsutomu FURUHASHI
  • Publication number: 20090033852
    Abstract: A liquid crystal display device includes: a first substrate; a second substrate which is placed nearer to a viewer than the first substrate, and which faces a viewer side of the first substrate; a liquid crystal sandwiched between the first substrate and the second substrate; an upper polarization plate which is placed nearer to the viewer than the second substrate, and which faces a viewer side of the second substrate; and a transparent resin plate which is placed nearer to the viewer than the upper polarization plate, and which is attached to a viewer side of the upper polarization plate with one of an adhesive material and a bonding material, the transparent resin plate includes a transparent oxide film on a face that faces the upper polarization plate, and the transparent resin plate is in close contact with the adhesive material or the bonding material through the transparent oxide film.
    Type: Application
    Filed: August 1, 2008
    Publication date: February 5, 2009
    Inventors: Koichi Fukuda, Tetsuya Oshima, Satoru Kawasaki, Tsutomu Sato, Kouji Hayakawa
  • Patent number: 6172732
    Abstract: In order to provide a liquid crystal display device of high display quality by improving the evenness of a liquid crystal cell gap in a marginal frame portion of a liquid crystal element suited to a narrow frame, the liquid crystal display device is provided with a pair of liquid crystal display element substrates having a liquid crystal sandwiched therebetween, and a plurality of liquid crystal driving elements connected to conductors formed on each of the liquid crystal display element substrates, for driving the liquid crystal. Each of the liquid crystal display element substrates includes a plurality of display electrodes wired in parallel, a plurality of parallel terminal electrodes, mutually parallel oblique straight wiring electrodes, and a plurality of dummy electrodes generally parallel to the terminal electrodes.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: January 9, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Kouji Hayakawa, Masayoshi Fujieda, Noboru Hoshino, Yoshiyuki Imasaka
  • Patent number: 5838411
    Abstract: A liquid crystal display device includes a liquid crystal display panel. The liquid crystal display panel includes a first transparent substrate having color filters arranged in a predetermined order, a patterned light blocking film formed between the color filters and first transparent electrodes formed on the color filters; a second transparent substrate having second transparent electrodes arranged to intersect the first transparent electrodes; a liquid crystal layer sandwiched between the first and second transparent substrates with the first and second transparent electrodes opposing each other and spacers dispersed between the first and second transparent substrates. The color filters and the light blocking film extend into a marginal area outside an area optically switchable upon application of an electric field on the liquid crystal display panel in substantially the same geometric pattern as within the optically switchable area.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: November 17, 1998
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Kouji Hayakawa, Satoshi Endo, Hisashi Yoshida, Noboru Hoshino, Masayoshi Fujieda