Patents by Inventor Ken Ohara
Ken Ohara 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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Publication number: 20230255524Abstract: A detection device includes a housing, a light source provided in the housing, an optical sensor provided in the housing, a plurality of line-shaped first light guides provided in the housing and capable of guiding light emitted by the light source, and a plurality of line-shaped second light guides provided in the housing and capable of receiving the light guided by the first light guides and guiding the received light to the optical sensor.Type: ApplicationFiled: February 3, 2023Publication date: August 17, 2023Inventor: Ken OHARA
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Patent number: 8274619Abstract: 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: GrantFiled: March 8, 2011Date of Patent: September 25, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Ken Ohara, Tsunenori Yamamoto, Yoshiaki Nakayoshi, Hiroshi Saito, Jun Ooida
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Patent number: 8139194Abstract: 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: GrantFiled: September 12, 2011Date of Patent: March 20, 2012Assignees: Hitachi Display, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Tsunenori Yamamoto, Ken Ohara, Yoshiaki Nakayoshi, Susumu Edo, Hiroshi Saito
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Publication number: 20120001835Abstract: 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: ApplicationFiled: September 12, 2011Publication date: January 5, 2012Inventors: Tsunenori YAMAMOTO, Ken Ohara, Yoshiaki Nakayoshi, Susumu Edo, Hiroshi Saito
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Patent number: 8023087Abstract: 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: GrantFiled: August 8, 2007Date of Patent: September 20, 2011Assignee: Hitachi Displays, Ltd.Inventors: Tsunenori Yamamoto, Ken Ohara, Yoshiaki Nakayoshi, Susumu Edo, Hiroshi Saito
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Publication number: 20110157508Abstract: 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: ApplicationFiled: March 8, 2011Publication date: June 30, 2011Inventors: Ken Ohara, Tsunenori Yamamoto, Yoshiaki Nakayoshi, Hiroshi Saito, Jun Ooida
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Patent number: 7944514Abstract: 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: GrantFiled: January 17, 2008Date of Patent: May 17, 2011Assignee: Hitachi Displays, Ltd.Inventors: Ken Ohara, Yoshiaki Nakayoshi, Tsunenori Yamamoto, Susumu Edo
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Patent number: 7916231Abstract: 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: GrantFiled: June 6, 2008Date of Patent: March 29, 2011Assignee: Hitachi Displays, Ltd.Inventors: Jun Ooida, Takahiro Miyazaki, Ken Ohara, Hiroshi Saito, Yoshiaki Nakayoshi
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Patent number: 7903218Abstract: 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: GrantFiled: January 15, 2008Date of Patent: March 8, 2011Assignee: Hitachi Displays, Ltd.Inventors: Ken Ohara, Tsunenori Yamamoto, Yoshiaki Nakayoshi, Hiroshi Saito, Jun Ooida
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Patent number: 7800729Abstract: 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: GrantFiled: February 26, 2008Date of Patent: September 21, 2010Assignee: Hitachi Displays, Ltd.Inventors: Ken Ohara, Tsunenori Yamamoto, Yoshiaki Nakayoshi, Hiroshi Saito, Jun Ooida
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Patent number: 7655510Abstract: A display panel manufacturing method in which forming a thin film on a substrate and etching the thin film are repeated a plurality of times to form on the substrate a plurality of scanning signal lines, a plurality of video signal lines that three-dimensionally intersects the plurality of scanning signal lines with an insulating layer between them, and TFT elements and pixel electrodes each disposed in a pixel area enclosed with two adjacent scanning signal lines and two adjacent video signal lines. The method also includes: exposing a resist film using exposure dimensions numerically expressed based on design patterns prepared in advance; etching the thin film using etching resists formed by developing the exposed resist film so as to form thin-film patterns; and correcting the design patterns according to the complete dimensions of the formed thin-film patterns.Type: GrantFiled: July 24, 2007Date of Patent: February 2, 2010Assignee: Hitachi Displays, Ltd.Inventors: Yoshiaki Nakayoshi, Takahiro Miyazaki, Jun Ooida, Ken Ohara
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Patent number: 7595506Abstract: The present invention provides a technique which can make an image quality on a screen of a TFT liquid crystal display device uniform. A liquid crystal display device includes a TFT substrate on which TFT circuits are arranged in an array, a counter substrate which is arranged to face a surface of the TFT substrate on which the TFTs are formed, and a liquid crystal material which is filled between the TFT substrate and the counter substrate, wherein in the TFT substrate, assuming a film thickness and a width of a conductive film of the gate electrode lines in a first region thereof as GLD1 and GLW1 respectively, and a film thickness and a width of a conductive film of the gate electrode lines in a second region thereof which differs from the first region as GLD2 and GLW2 respectively, when the relationship GLD1<GLD2 is established, the relationship GLW1>GLW2 is established.Type: GrantFiled: March 15, 2006Date of Patent: September 29, 2009Assignee: Hitachi Displays, Ltd.Inventors: Ken Ohara, Jun Ooida, Hiroshi Saito, Yoshiaki Nakayoshi
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Publication number: 20090155933Abstract: To suppress the occurrence of image quality irregularities in a liquid crystal display device having a TFT substrate which is manufactured by performing steps a plurality of times in such a manner that one region is divided into a plurality of exposure regions, and the plurality of exposure regions is exposed.Type: ApplicationFiled: December 10, 2008Publication date: June 18, 2009Inventors: Ken OHARA, Tsunenori Yamamoto, Susumu Edo, Yoshiaki Nakayoshi, Hiroshi Saito
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Publication number: 20090033817Abstract: 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: ApplicationFiled: June 6, 2008Publication date: February 5, 2009Inventors: Jun Ooida, Takahiro Miyazaki, Ken Ohara, Hiroshi Saito, Yoshiaki Nakayoshi
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Publication number: 20080225191Abstract: 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: ApplicationFiled: January 15, 2008Publication date: September 18, 2008Inventors: Ken Ohara, Tsunenori Yamamoto, Yoshiaki Nakayoshi, Hiroshi Saito, Jun Ooida
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Publication number: 20080212010Abstract: 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: ApplicationFiled: February 26, 2008Publication date: September 4, 2008Inventors: Ken Ohara, Tsunenori Yamamoto, Yoshiaki Nakayoshi, Hiroshi Saito, Jun Ooida
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Publication number: 20080048934Abstract: 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: ApplicationFiled: August 8, 2007Publication date: February 28, 2008Inventors: TSUNENORI YAMAMOTO, Ken Ohara, Yoshiaki Nakayoshi, Susumu Edo, Hiroshi Saito
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Publication number: 20080036987Abstract: 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: ApplicationFiled: July 24, 2007Publication date: February 14, 2008Inventors: Yoshiaki Nakayoshi, Takahiro Miyazaki, Jun Ooida, Ken Ohara
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Publication number: 20060220024Abstract: The present invention provides a technique which can make an image quality on a screen of a TFT liquid crystal display device uniform. A liquid crystal display device includes a TFT substrate on which TFT circuits are arranged in an array, a counter substrate which is arranged to face a surface of the TFT substrate on which the TFTs are formed, and a liquid crystal material which is filled between the TFT substrate and the counter substrate, wherein in the TFT substrate, assuming a film thickness and a width of a conductive film of the gate electrode lines in a first region thereof as GLD1 and GLW1 respectively, and a film thickness and a width of a conductive film of the gate electrode lines in a second region thereof which differs from the first region as GLD2 and GLW2 respectively, when the relationship GLD1<GLD2 is established, the relationship GLW1>GLW2 is established.Type: ApplicationFiled: March 15, 2006Publication date: October 5, 2006Inventors: Ken Ohara, Jun Ooida, Hiroshi Saito, Yoshiaki Nakayoshi