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).
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Patent number: 9239644Abstract: 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: GrantFiled: March 27, 2015Date of Patent: January 19, 2016Assignee: Japan Display Inc.Inventors: Koji Doi, Kouji Hayakawa
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Publication number: 20150199060Abstract: 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: ApplicationFiled: March 27, 2015Publication date: July 16, 2015Inventors: Koji DOI, Kouji HAYAKAWA
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Patent number: 9019196Abstract: 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: GrantFiled: March 27, 2013Date of Patent: April 28, 2015Assignee: Japan Display Inc.Inventors: Koji Doi, Kouji Hayakawa
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Patent number: 8736576Abstract: 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: GrantFiled: October 11, 2011Date of Patent: May 27, 2014Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventor: Kouji Hayakawa
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Patent number: 8537136Abstract: 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: GrantFiled: April 16, 2010Date of Patent: September 17, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Shinji Sekiguchi, Koji Nagata, Kouji Hayakawa
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Patent number: 8487901Abstract: 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: GrantFiled: November 24, 2009Date of Patent: July 16, 2013Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Kouji Hayakawa, Koji Nagata, Norio Mamba, Toshiyuki Kumagai, Shinji Sekiguchi, Kouichi Anno, Tsutomu Furuhashi
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Publication number: 20120092292Abstract: 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: ApplicationFiled: October 11, 2011Publication date: April 19, 2012Inventor: Kouji HAYAKAWA
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Patent number: 8023082Abstract: 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: GrantFiled: August 1, 2008Date of Patent: September 20, 2011Assignee: Hitachi Displays, Ltd.Inventors: Koichi Fukuda, Tetsuya Oshima, Satoru Kawasaki, Tsutomu Sato, Kouji Hayakawa
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Publication number: 20100271328Abstract: 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: ApplicationFiled: April 16, 2010Publication date: October 28, 2010Inventors: Shinji SEKIGUCHI, Koji Nagata, Kouji Hayakawa, Norio Mamba
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Publication number: 20100265212Abstract: 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: ApplicationFiled: April 16, 2010Publication date: October 21, 2010Inventors: Shinji Sekiguchi, Koji Nagata, Kouji Hayakawa
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Publication number: 20100134440Abstract: 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: ApplicationFiled: November 24, 2009Publication date: June 3, 2010Inventors: Kouji HAYAKAWA, Koji NAGATA, Norio MAMBA, Toshiyuki KUMAGAI, Shinji SEKIGUCHI, Kouichi ANNO, Tsutomu FURUHASHI
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Publication number: 20090033852Abstract: 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: ApplicationFiled: August 1, 2008Publication date: February 5, 2009Inventors: Koichi Fukuda, Tetsuya Oshima, Satoru Kawasaki, Tsutomu Sato, Kouji Hayakawa
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Patent number: 6172732Abstract: 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: GrantFiled: December 4, 1997Date of Patent: January 9, 2001Assignee: Hitachi, Ltd.Inventors: Kouji Hayakawa, Masayoshi Fujieda, Noboru Hoshino, Yoshiyuki Imasaka
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Liquid crystal display device with unequal sized dummy sub-electrodes having a specific relationship
Patent number: 5838411Abstract: 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: GrantFiled: December 10, 1997Date of Patent: November 17, 1998Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.Inventors: Kouji Hayakawa, Satoshi Endo, Hisashi Yoshida, Noboru Hoshino, Masayoshi Fujieda