Patents by Inventor Masuyuki Ohta

Masuyuki Ohta 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: 7158202
    Abstract: A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, a plurality of scanning signal lines and a plurality of video signal lines formed on one of the pair of substrates, a plurality of first electrodes provided on the one of the pair of substrates, and a plurality of second electrodes provided on the one of the pair of substrates to drive the liquid crystal layer by a voltage difference with respect to the first electrode. The first electrode and the second electrode are arranged in different layers with an insulating layer therebetween. The first electrode has a bent form and each first electrode is connected by connecting portion in each pixel, and the connecting portion has an overlapping relation with at least one the second electrode and a signal line connected to the second electrode.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: January 2, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20060290862
    Abstract: An active matrix liquid crystal display device includes substrates, a liquid crystal layer therebetween, video signal lines and scan signal lines formed on one of the substrates, and pixel electrodes connected to one of the video signal lines through an active device. Pixel areas, which are defined by the video signal lines and the scan signal lines which are formed in the shape of a matrix, have display electrodes, reference electrodes and the active device arranged therein. The display electrodes are arranged on one of the substrates, and the reference electrodes are arranged on another of the substrates, and each of the display electrodes and the reference electrodes has a slit. The slit of the display electrodes and the slit of the reference electrodes are shifted with respect to one another in plan view.
    Type: Application
    Filed: August 29, 2006
    Publication date: December 28, 2006
    Inventors: Kazuhiko Yanagawa, Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi
  • Publication number: 20060244888
    Abstract: A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, a plurality of scanning signal lines and a plurality of video signal lines formed on one of said pair of substrates, a plurality of first electrodes on the one of said pair of substrates and a plurality of second electrodes on the one of said pair of substrates to drive the liquid crystal by a voltage difference with respect to the first electrode. The first electrodes have a bent form, and the second electrodes have a rectangular form.
    Type: Application
    Filed: June 15, 2006
    Publication date: November 2, 2006
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yonai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 7102711
    Abstract: An active matrix liquid crystal display device having a pair of substrates with liquid crystal layer therebetween, a plurality of video signal lines and a plurality of scan lines formed on one of the pair of substrates and a plurality of pixel electrodes connected to the video signal line through an active device and a plurality of color filters formed on another of the pair of substrates. A shield electrode which overlaps with one of the video signal lines in plane view is arranged between the one of the video signal lines and one of the color filters, and a planarization layer is arranged between one of the pixel electrodes and the shield electrode.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: September 5, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Yanagawa, Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi
  • Patent number: 7095470
    Abstract: A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, scanning signal lines and video signal lines formed on one of the substrates, first electrodes provided on the one substrate, second electrodes provided on the one substrate to drive the liquid crystal layer by a voltage difference with respect to the first electrode, and an orientation film formed on a nearest surface to the liquid crystal layer on each of the substrates and having an initial orientation direction. At least two first electrodes and at least one second electrode are provided in each pixel with the first electrode and the second electrode having portions substantially in parallel. The at least two first electrode are connected by connecting portion in each pixel.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: August 22, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 7088414
    Abstract: A liquid crystal display device includes a pair of substrates sandwiching of a liquid crystal layer, plural scanning signal lines and plural video signal lines formed on one of the pair of substrates, and plural pixel regions formed as an area surrounded by an adjacent two of the plural scanning signal lines and an adjacent two of the plural video signal lines. At least a pixel electrode is formed on the one of the pair of substrates in each of the pixel regions, a plurality of counter electrodes is formed on one of the pair of substrates in each of the pixel regions, and at least a counter voltage signal line connects the counter electrodes formed on one of the pair of substrates. The counter voltage signal line is arranged in an overlapping relation with at least one of the scanning signal lines in plan view.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: August 8, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 7079212
    Abstract: A liquid crystal display device includes a pair of substrates sandwiching a liquid crystal layer, scanning signal lines and video signal lines formed on one substrate, plural pixel electrodes on the one substrate, and at least a counter electrode on the one substrate to drive the liquid crystal layer by a voltage difference with respect to the pixel electrode. An orientation film formed on a nearest surface to the liquid crystal layer on substrate has an initial orientation direction. At least one of the pixel electrode and the counter electrode has a first region and a second region, and an angle formed by the first region and the initial orientation direction is substantially same in absolute value and reverse in polarity to an angle formed by the second region and the initial orientation direction. A length of the first region and the second region are substantially equal.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: July 18, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 7046324
    Abstract: An active matrix liquid crystal display device having a pair of substrates, a liquid crystal layer, scanning lines and video signal lines provided in a matrix manner, at least one pixel electrode and at least one common electrode. The at least one pixel electrode is bent so as to be inclined in first and second directions which are symmetrical relative to the alignment direction of the liquid crystal. The first direction of the pixel electrode is at a plus predetermined angle relative to the alignment direction, while the second direction of the pixel electrode is at a minus predetermined angle relative to the alignment direction.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: May 16, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 7046325
    Abstract: An active matrix liquid crystal display device having a pair of substrates, a liquid crystal layer, scanning lines and video signal lines provided in a matrix manner, at least one pixel electrode and at least one common electrode. The pixel electrode is bent so as to be inclined in first and second directions which are symmetrical relative to the alignment direction of the liquid crystal. The first direction of the pixel electrode is at a plus predetermined angle relative to the alignment direction, while the second direction of the pixel electrode is at a minus predetermined angle relative to the alignment direction.
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: May 16, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20060023152
    Abstract: A liquid crystal display device includes a backlight case, a light guide disposed in the backlight case, a light source disposed in the backlight case and arranged at one side of the light guide, and a liquid crystal panel formed over the backlight case. An outer edge of the backlight case is straight in plane view at one side which extends in a direction perpendicular to an elongated direction of the light source, and a width of a top surface of the backlight case at the one side is wider at a position adjacent to the light guide than a width thereof at a position adjacent to the light source arranged.
    Type: Application
    Filed: September 30, 2005
    Publication date: February 2, 2006
    Inventors: Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Kazuhiko Yanagawa, Masahiro Yanai, Nobutake Konishi, Nobuyuki Suzuki, Masahiro Ishii, Makoto Yoneya, Sukekazu Aratani
  • Publication number: 20050275784
    Abstract: A display device includes a first substrate having formed thereon a plurality of video signal lines and a plurality of gate signal lines, a plurality of pixel electrodes, a plurality of thin film transistors, and a plurality of pixels. Each pixel includes a pixel electrode of the plurality of pixel electrodes and a thin film transistor of the plurality of thin film transistors. The thin film transistor includes a semiconductor layer, a drain electrode electrically connected to a drain signal line, and a source electrode electrically connected to the pixel electrode. The semiconductor layer has an outline so that a nearest portion to a center of the pixel is positioned under the source electrode in plan view.
    Type: Application
    Filed: June 16, 2005
    Publication date: December 15, 2005
    Inventors: Keiichiro Ashizawa, Masayuki Hikiba, Masuyuki Ohta
  • Patent number: 6975374
    Abstract: A liquid crystal display device includes a pair of substrates with a liquid crystal layer therebetween, and a plurality of scan signal lines and a plurality of image signal lines formed on one of the pair of substrates cross each other in a matrix form. A pair of counter electrodes are arranged on both sides of the plurality of image signal lines, and a shielding layer is provided on the one of the pair of substrates and arranged between one of the a pair of counter electrodes and one of the plurality of image signal lines in plan view. A layer of the shielding layer is different from a layer of the pair of counter electrodes and a layer of the one of the plurality of image signal lines.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: December 13, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Kazuhiko Yanagawa, Masahiro Yanai, Nobutake Konishi, Nobuyuki Suzuki, Masahiro Ishii, Makoto Yoneya, Sukekazu Aratani
  • Publication number: 20050253141
    Abstract: A display device includes a first conductive layer formed on a substrate, an insulating layer formed on a portion of the first conductive layer and having a flat plane and an edge, and a second conductive layer continuously formed on the flat plane of the insulating layer, on the edge of the insulating layer, and on another portion of the first conductive layer. The edge of the insulating layer has a region so that an angle formed between the edge of the insulating layer and the first conductive layer is changed to be small at a side near to the first conductive layer.
    Type: Application
    Filed: July 22, 2005
    Publication date: November 17, 2005
    Inventors: Masuyuki Ohta, Masahiro Ishi, Kikuo Ono, Nobuyuki Suzuki
  • Publication number: 20050225692
    Abstract: An active matrix liquid crystal display device having a pair of substrates with liquid crystal layer therebetween, a plurality of video signal lines and a plurality of scan lines formed on one of the pair of substrates and a plurality of pixel electrodes connected to the video signal line through an active device and a plurality of color filters formed on another of the pair of substrates. A shield electrode which overlaps with one of the video signal lines in plane view is arranged between the one of the video signal lines and one of the color filters, and a planarization layer is arranged between one of the pixel electrodes and the shield electrode.
    Type: Application
    Filed: June 6, 2005
    Publication date: October 13, 2005
    Inventors: Kazuhiko Yanagawa, Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi
  • Patent number: 6927816
    Abstract: An active matrix liquid crystal display device having a pair of substrates with liquid crystal layer therebetween, a plurality of video signal lines and a plurality of scan lines formed on one of the pair of substrates and a plurality of pixel electrodes connected to the video signal line through an active device and a plurality of color filters formed on another of the pair of substrates. A shield electrode which overlaps with one of the video signal lines in plane view is arranged between the one of the video signal lines and one of the color filters, and a planarization layer is arranged between one of the pixel electrodes and the shield electrode.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: August 9, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Yanagawa, Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi
  • Patent number: 6924865
    Abstract: An active matrix type liquid crystal display device having a first and a second substrate with a liquid crystal layer therebetween, a plurality of drain lines and gate lines formed on the first substrate and crossing each other in a matrix form, and a plurality of counter signal lines formed on the first substrate and extending along an extension direction of the gate lines. Pixels are delimited by adjacent ones of the drain lines and the gate lines. A counter signal line connects counter electrodes of neighboring pixels which are arranged with a drain line therebetween by crossing the drain line, and the counter electrodes of neighboring pixels which are arranged with a gate line therebetween are electrically connected by a connecting member. The connecting member is arranged so as to be spaced with respect to the drain line in plane view.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: August 2, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Masahiro Ishi, Kikuo Ono, Nobuyuki Suzuki
  • Patent number: 6912033
    Abstract: A liquid crystal display device includes first and second substrates, a liquid crystal layer interposed therebetween, video signal lines, gate signal lines and counter signal lines formed on the first substrate, counter electrodes connected to one of the counter signal lines formed on the first substrate, pixel electrodes formed on the first substrate and pixel regions having at least a counter electrode and at least a pixel electrode. A distance between farthest apart edges of the counter electrodes in one of the pixel regions is longer than a distance between farthest apart edges of the pixel electrodes in the one of the pixel regions in a direction perpendicular to an extension direction of the video signal lines.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: June 28, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Keiichiro Ashizawa, Masayuki Hikiba, Masuyuki Ohta
  • Patent number: 6887731
    Abstract: A method of manufacturing a liquid crystal display device is intended to decrease the number of manufacturing steps. The liquid crystal display device is arranged so that in each pixel area provided on a liquid-crystal-side surface of one of a pair of substrates disposed to oppose each other with a liquid crystal interposed therebetween, a signal from a drain line is applied to a pixel electrode via a drain electrode and a source electrode which are formed in a layer overlying a semiconductor layer of a thin film transistor, by the supply of a scanning signal from a gate electrode which is positioned as an underlying layer with respect to the semiconductor layer.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: May 3, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Takanori Nakayama, Masuyuki Ohta, Masahiko Ando
  • Publication number: 20050062922
    Abstract: A method of manufacturing a liquid crystal display device is intended to decrease the number of manufacturing steps. The liquid crystal display device is arranged so that in each pixel area provided on a liquid-crystal-side surface of one of a pair of substrates disposed to oppose each other with a liquid crystal interposed therebetween, a signal from a drain line is applied to a pixel electrode via a drain electrode and a source electrode which are formed in a layer overlying a semiconductor layer of a thin film transistor, by the supply of a scanning signal from a gate electrode which is positioned as an underlying layer with respect to the semiconductor layer.
    Type: Application
    Filed: November 5, 2004
    Publication date: March 24, 2005
    Applicant: Hitachi, Ltd.
    Inventors: Takanori Nakayama, Masuyuki Ohta, Misahiko Ando
  • Patent number: 6862068
    Abstract: A liquid crystal display device includes a first substrate. A second substrate is facing the first substrate. A liquid crystal layer is interposed between the first and second substrates. At least one pixel area is defined by a plurality of gate lines and a plurality of drain lines arranged in a matrix over the first substrate, wherein the plurality of gate lines are extending in a first direction, and the plurality of drain lines are extending in a second direction. A first electrode is assigned to the pixel area, wherein the first electrode is provided over the first substrate. A second electrode is assigned to the pixel area and is facing the first electrode, wherein the second electrode is provided over the first substrate and is transparent. The second electrode has a solid portion and a hollow portion. The hollow portion is superposed to at least a portion of the first electrode. An insulating layer is provided between the first and second electrodes.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: March 1, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Junichi Ohwada, Nobutake Konishi, Masayuki Hikiba