Patents by Inventor Jun Ooida
Jun Ooida 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: 8325284Abstract: The manufacturing method of a liquid crystal display device includes a step of forming the scanning signal lines including a step in which a photosensitive material film is exposed using an exposure device having a spatial light modulating element which generates an exposure pattern by a numerical control based on drawing data prepared based on the layout data. The drawing data is prepared by correction such that a shape of a portion of the scanning signal line in the layout data which is overlapped to a source electrode has an area corresponding to the distribution of a film thickness of an insulation layer interposed between the scanning signal line and the source electrode.Type: GrantFiled: August 30, 2010Date of Patent: December 4, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Takahiro Miyazaki, Jun Ooida
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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: 7993179Abstract: An exposure method that suppresses distribution of pattern shapes at the time of exposure. In a manufacturing method for a display unit, a layer forming a reference for pattern arrangement is determined among layers formed on a panel. An arrangement of a pattern in a layer above the reference layer is determined using a value obtained from distribution of the pattern arrangement in the reference layer.Type: GrantFiled: January 17, 2008Date of Patent: August 9, 2011Assignee: Hitachi Displays, Ltd.Inventors: Seiji Ishikawa, Jun Ooida, Yoshinori Muramatsu, Takahiro Miyazaki
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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: 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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Publication number: 20110050552Abstract: The manufacturing method of a liquid crystal display device includes a step of forming the scanning signal lines including a step in which a photosensitive material film is exposed using an exposure device having a spatial light modulating element which generates an exposure pattern by a numerical control based on drawing data prepared based on the layout data. The drawing data is prepared by correction such that a shape of a portion of the scanning signal line in the layout data which is overlapped to a source electrode has an area corresponding to the distribution of a film thickness of an insulation layer interposed between the scanning signal line and the source electrode.Type: ApplicationFiled: August 30, 2010Publication date: March 3, 2011Inventors: Takahiro MIYAZAKI, 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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Publication number: 20090244466Abstract: A liquid crystal display device which can decrease periodical stripe-shaped irregularities is provided. In an active-matrix-type liquid crystal display device, a width of a stripe-shaped irregularity generating region where distance between a pixel electrode and a counter electrode changes is set to 50 ?m less. To be more specific, at the time of exposing a resist pattern on a TFT substrate, by scanning an exposure light plural times using a direct drawing exposure machine, a width of an overlapping region of exposure regions which is generated in scanning is set to 50 ?m or less thus setting the width of the stripe-shaped irregularity generating region to 50 ?m or less.Type: ApplicationFiled: April 1, 2009Publication date: October 1, 2009Inventors: Toshio Tojo, Nobuyasu Hayashi, Jun Ooida, Hideo Tanabe, Toshiki Kaneko
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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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Patent number: 7576828Abstract: A liquid crystal display device comprises a pair of substrates which are arranged to face each other in an opposed manner while sandwiching liquid crystal therebetween, pixel regions which are formed on a liquid-crystal-side surface of one substrate out of the pair of substrates, and thin film transistors which are formed on respective pixel regions, wherein each thin film transistor includes a gate electrode connected to a gate signal line, a semiconductor layer laminated to the gate electrode by way of an insulation film, a drain electrode formed on the semiconductor layer and connected to a drain signal line, and a source electrode connected to a pixel electrode, and the semiconductor layer is formed in a periodically irregular shape in a zone having a width substantially larger than a width of the source electrode on a side thereof from which at least the source electrode is pulled out.Type: GrantFiled: June 20, 2008Date of Patent: August 18, 2009Assignee: Hitachi, Ltd.Inventors: Takanori Nakayama, Ryuuta Watanabe, Jun Ooida, Yasuko Gotoh, Kaori Miyazaki
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Patent number: 7561243Abstract: A liquid crystal display device comprises a pair of substrates which are arranged to face each other in an opposed manner while sandwiching liquid crystal therebetween, pixel regions which are formed on a liquid-crystal-side surface of one substrate out of the pair of substrates, and thin film transistors which are formed on respective pixel regions, wherein each thin film transistor includes a gate electrode connected to a gate signal line, a semiconductor layer laminated to the gate electrode by way of an insulation film, a drain electrode formed on the semiconductor layer and connected to a drain signal line, and a source electrode connected to a pixel electrode, and the semiconductor layer is formed in a periodically irregular shape in a zone having a width substantially larger than a width of the source electrode on a side thereof from which at least the source electrode is pulled out.Type: GrantFiled: July 9, 2002Date of Patent: July 14, 2009Assignee: Hitachi, Ltd.Inventors: Takanori Nakayama, Ryuuta Watanabe, Jun Ooida, Yasuko Gotoh, Kaori Miyazaki
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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: 20080266476Abstract: A liquid crystal display device comprises a pair of substrates which are arranged to face each other in an opposed manner while sandwiching liquid crystal therebetween, pixel regions which are formed on a liquid-crystal-side surface of one substrate out of the pair of substrates, and thin film transistors which are formed on respective pixel regions, wherein each thin film transistor includes a gate electrode connected to a gate signal line, a semiconductor layer laminated to the gate electrode by way of an insulation film, a drain electrode formed on the semiconductor layer and connected to a drain signal line, and a source electrode connected to a pixel electrode, and the semiconductor layer is formed in a periodically irregular shape in a zone having a width substantially larger than a width of the source electrode on a side thereof from which at least the source electrode is pulled out.Type: ApplicationFiled: June 20, 2008Publication date: October 30, 2008Inventors: Takanori Nakayama, Ryuuta Watanabe, Jun Ooida, Yasuko Gotoh, Kaori Miyazaki
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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: 20080176478Abstract: An exposure method that suppresses distribution of pattern shapes at the time of exposure. In a manufacturing method for a display unit, a layer forming a reference for pattern arrangement is determined among layers formed on a panel. An arrangement of a pattern in a layer above the reference layer is determined using a value obtained from distribution of the pattern arrangement in the reference layer.Type: ApplicationFiled: January 17, 2008Publication date: July 24, 2008Inventors: Seiji ISHIKAWA, Jun Ooida, Yoshinori Muramatsu, Takahiro Miyazaki
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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