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).
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Patent number: 7872696Abstract: 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: GrantFiled: November 25, 2008Date of Patent: January 18, 2011Assignee: Hitachi, Ltd.Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa
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Publication number: 20100328596Abstract: 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 has a plurality of drain signal lines and a plurality of gate signal lines, and a plurality of pixel regions defined by the drain signal lines and the gate signal lines. The pixel regions have a TFT element, a pixel electrode formed of a transparent electrode having a plurality of slits, and a counter electrode formed of a transparent electrode. The counter electrode is disposed between the pixel electrode and the one of the pair of transparent substrates in overlapping relationship with the transparent electrode of the pixel electrode and the gate signal line, and the counter electrode is connected with the counter electrode of an adjacent pixel region.Type: ApplicationFiled: September 14, 2010Publication date: December 30, 2010Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
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Patent number: 7834959Abstract: A liquid crystal display device includes at least a liquid crystal display panel, which uses a pair of transparent substrates which are arranged to face each other with liquid crystal disposed therebetween as an envelope, and a light guide plate, which guides light from a light source, being sequentially arranged from a viewer side. The liquid crystal display panel forms light reflection layers on a liquid-crystal-side surface of the light-guide-plate side transparent substrate using portions of respective pixels and forms color filters which face the light reflection layers on the liquid-crystal-side surface of one transparent substrate or a liquid-crystal-side surface of the other transparent substrate which faces the one transparent substrate. Light from the light source is irradiated such that respective colors thereof, which constitute three primary colors, are sequentially changed over.Type: GrantFiled: November 13, 2009Date of Patent: November 16, 2010Assignee: Hitachi Displays, Ltd.Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa
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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: 7796231Abstract: 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 is formed integrally along the entire periphery of a display screen, and one of the light-shielding layer and the organic film layer is formed to be extended beyond an area where the sealing material is formed, and the other of the light-shielding layer and organic film layer is formed inside the area where the sealing material is formed.Type: GrantFiled: May 30, 2008Date of Patent: September 14, 2010Assignee: Hitachi, Ltd.Inventors: Yoshiaki Nakayoshi, Nagatoshi Kurahashi, Kazuhiko Yanagawa
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Publication number: 20100214524Abstract: 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: ApplicationFiled: April 29, 2010Publication date: August 26, 2010Inventors: Kazuhiko Yanagawa, Yasushi Iwakabe, Yoshiaki Nakayoshi, Masatoshi Wakagi
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Patent number: 7768621Abstract: 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: GrantFiled: October 17, 2007Date of Patent: August 3, 2010Assignee: Hitachi, Ltd.Inventors: Ryuutarou Oke, Yoshiaki Nakayoshi, Kikuo Ono
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Patent number: 7738069Abstract: 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: GrantFiled: April 15, 2008Date of Patent: June 15, 2010Assignee: Hitachi, Ltd.Inventors: Kazuhiko Yanagawa, Yasushi Iwakabe, Yoshiaki Nakayoshi, Masatoshi Wakagi
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Patent number: 7733455Abstract: 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: GrantFiled: December 10, 2008Date of Patent: June 8, 2010Assignee: Hitachi, Ltd.Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
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Patent number: 7709163Abstract: The present invention facilitates a control of a temperature of white color and color tones of respective colors of a color liquid crystal display device. To achieve such an aim, a display device of the present invention includes a display panel which arranges a plurality of color filters which differ in color for each pixel, and at least the color filter of one color is formed of a plurality of filter layers stacked on a transparent substrate.Type: GrantFiled: August 25, 2006Date of Patent: May 4, 2010Assignee: Hitachi Displays, Ltd.Inventors: Toshimasa Ishigaki, Fumio Takahashi, Yoshiaki Nakayoshi
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Patent number: 7705949Abstract: 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: GrantFiled: December 10, 2008Date of Patent: April 27, 2010Assignee: Hitachi, Ltd.Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
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Patent number: 7697100Abstract: 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: GrantFiled: October 26, 2007Date of Patent: April 13, 2010Assignee: Hitachi, Ltd.Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
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Patent number: 7692748Abstract: 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: GrantFiled: December 10, 2008Date of Patent: April 6, 2010Assignee: Hitachi, Ltd.Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
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Publication number: 20100073588Abstract: 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: ApplicationFiled: September 18, 2009Publication date: March 25, 2010Inventors: Kikuo Ono, Masahiro Tanaka, Yoshiaki Nakayoshi, Nobuyuki Suzuki
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Patent number: 7683996Abstract: 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: GrantFiled: December 10, 2008Date of Patent: March 23, 2010Assignee: Hitachi, Ltd.Inventors: Kikuo Ono, Makoto Yoneya, Tsunenori Yamamoto, Junichi Hirakata, Yoshiaki Nakayoshi
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Publication number: 20100053501Abstract: A liquid crystal display device includes at least a liquid crystal display panel, which uses a pair of transparent substrates which are arranged to face each other with liquid crystal disposed therebetween as an envelope, and a light guide plate, which guides light from a light source, being sequentially arranged from a viewer side. The liquid crystal display panel forms light reflection layers on a liquid-crystal-side surface of the light-guide-plate side transparent substrate using portions of respective pixels and forms color filters which face the light reflection layers on the liquid-crystal-side surface of one transparent substrate or a liquid-crystal-side surface of the other transparent substrate which faces the one transparent substrate. Light from the light source is irradiated such that respective colors thereof, which constitute three primary colors, are sequentially changed over.Type: ApplicationFiled: November 13, 2009Publication date: March 4, 2010Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa
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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: 7639324Abstract: A liquid crystal display device includes at least a liquid crystal display panel, which uses a pair of transparent substrates which are arranged to face each other with liquid crystal disposed therebetween as an envelope, and a light guide plate, which guides light from a light source, being sequentially arranged from a viewer side. The liquid crystal display panel forms light reflection layers on a liquid-crystal-side surface of the light-guide-plate side transparent substrate using portions of respective pixels and forms color filters which face the light reflection layers on the liquid-crystal-side surface of one transparent substrate or a liquid-crystal-side surface of the other transparent substrate which faces the one transparent substrate. Light from the light source is irradiated such that respective colors thereof, which constitute three primary colors, are sequentially changed over.Type: GrantFiled: July 19, 2007Date of Patent: December 29, 2009Assignee: Hitachi Displays, Ltd.Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa
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Patent number: 7605876Abstract: 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: GrantFiled: October 29, 2007Date of Patent: October 20, 2009Assignee: Hitachi, Ltd.Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa
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Patent number: 7605900Abstract: 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: GrantFiled: October 30, 2007Date of Patent: October 20, 2009Assignee: Hitachi, Ltd.Inventors: Kikuo Ono, Masahiro Tanaka, Yoshiaki Nakayoshi, Nobuyuki Suzuki