Patents by Inventor Masato Kemmochi

Masato Kemmochi 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: 6433848
    Abstract: A front surface of the opposite electrode of a liquid crystal display panel is formed in a curved shape. The relation between the reflecting surface of the pixel electrode and the curved surface of the opposite substrate is defined so that a leaving direction of the light that is reflected by the first face of the opposite substrate is different from a leaving direction of light that is emitted from the first face of the opposite substrate after having been reflected by the pixel electrodes through the liquid crystal layer. Thus, undesired light on the front surface of the opposite substrate is separated from light that is displayed. Consequently, an image free of dazzling and deterioration of contrast ratio due to undesired reflected light can be obtained with a high contrast ratio. In a display apparatus containing the reflection type liquid crystal display, an incident surface to a dichroic prism is an inclined surface including a curved surface, not a surface that is perpendicular to the optical axis.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: August 13, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroki Nakamura, Masato Kemmochi, Yoshitaka Yamada, Yoshihiro Watanabe, Michiya Kobayashi, Nozomu Harada
  • Patent number: 6252297
    Abstract: An array substrate typically used in a liquid crystal display device includes inter-layer insulating films thick enough to prevent step-off breakage of conductive layers at contact holes while promising a reliability. Thick inter-layer insulating films are made by stacking a film made of an inorganic material, such as silicon nitride or silicon oxide, having a low moisture permeability and thereby promising a reliability of the liquid crystal display device, and a film made of an organic material, such as acrylic resin, that can be readily stacked thick so that the inner wall of the contact hole is gently sloped with respect to the substrate surface to thereby prevent step-off breakage of a conductive layer as thin as 100 nm or less.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: June 26, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masato Kemmochi, Masato Shoji
  • Patent number: 6136624
    Abstract: An array substrate typically used in a liquid crystal display device includes inter-layer insulating films thick enough to prevent step-off breakage of conductive layers at contact holes while promising a reliability. Thick inter-layer insulating films are made by stacking a film made of an inorganic material, such as silicon nitride or silicon oxide, having a low moisture permeability and thereby promising a reliability of the liquid crystal display device, and a film made of an organic material, such as acrylic resin, that can be readily stacked thick so that the inner wall of the contact hole is gently sloped with respect to the substrate surface to thereby prevent step-off breakage of a conductive layer as thin as 100 nm or less.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: October 24, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masato Kemmochi, Masato Shoji
  • Patent number: 6124911
    Abstract: A front surface of the opposite electrode of a liquid crystal display panel is formed in a curved shape. The relation between the reflecting surface of the pixel electrode and the curved surface of the opposite substrate is defined so that a leaving direction of the light that is reflected by the first face of the opposite substrate is different from a leaving direction of light that is emitted from the first face of the opposite substrate after having been reflected by the pixel electrodes through the liquid crystal layer. Thus, undesired light on the front surface of the opposite substrate is separated from light that is displayed. Consequently, an image free of dazzling and deterioration of contrast ratio due to undesired reflected light can be obtained with a high contrast ratio. In a display apparatus containing the reflection type liquid crystal display, an incident surface to a dichroic prism is an inclined surface including a curved surface, not a surface that is perpendicular to the optical axis.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: September 26, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroki Nakamura, Masato Kemmochi, Yoshitaka Yamada, Yoshihiro Watanabe, Michiya Kobayashi, Nozomu Harada
  • Patent number: 5694189
    Abstract: A pixel electrode is disposed with an inclination angle to a base member on a front side (namely, an opposite substrate side) of a liquid crystal display panel. The relation between the reflecting surface of the pixel electrode and the main surface of the base member on the front side of the liquid crystal display panel is defined so that the difference between the reflecting angle of light that is entered as incident light and reflected on the surface of the base member and the leaving angle of light emitted as display light via the liquid crystal display panel exceeds the collection angle of the display apparatus. Thus, undesired light on the main surface of the base member of the display surface is separated from light that is displayed. Consequently, an image free of dazzling and deterioration of contrast ratio due to undesired reflected light can be obtained with a high contrast ratio.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 2, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroki Nakamura, Masato Kemmochi, Yoshitaka Yamada, Yoshihiro Watanabe, Michiya Kobayashi, Nozomu Harada