Patents by Inventor Yasuhisa Shiraishi

Yasuhisa Shiraishi 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).

  • Publication number: 20090135627
    Abstract: To prevent, in a backlight where light emitting diodes are arranged on a side surface of a light guide plate, light leakage from a reflection sheet and reduce non-uniformity of emission light from the backlight. In a liquid crystal display device that includes a backlight that irradiates a liquid crystal panel with light, LEDs are disposed as light emitting elements on a light guide plate that is disposed in the backlight, a reflection sheet that comprises a multilayer film is disposed on a bottom surface of the light guide plate, projections are disposed by sandblasting on the bottom surface of the light guide plate in the vicinity of the LEDs, and tight adhesion between the reflection sheet and the light guide plate is prevented. In the vicinity of the LEDs, in order to counter light non-uniformity, reflecting grooves are not disposed and it is a mirror surface, but tight adhesion can be prevented by disposing the projections.
    Type: Application
    Filed: November 14, 2008
    Publication date: May 28, 2009
    Inventors: Masayoshi Furuyama, Masahiko Kurihara, Yasuhisa Shiraishi
  • Publication number: 20090009688
    Abstract: The present invention provides a liquid crystal display device which can largely enhance a property of focusing light from a backlight. The backlight arranged on a back surface of a liquid crystal panel includes a light guide plate, a light source, a first asymmetrical prism sheet, and a second asymmetrical prism sheet. A reflection surface having an inclination of 2° or less for guiding light from the light source toward the liquid crystal display panel is formed on a back surface of the light guide plate. The first asymmetrical prism sheet and the second asymmetrical prism sheet respectively include projecting portions which extend in the arrangement direction of the light source and are arranged in parallel to each other in the direction which intersects the arrangement direction of the light source.
    Type: Application
    Filed: July 2, 2008
    Publication date: January 8, 2009
    Inventors: Nobuyuki Koganezawa, Akiyoshi Tobe, Yasuhisa Shiraishi
  • Publication number: 20080165308
    Abstract: In a liquid crystal display device using a light emitting diode as a light source, even when a plurality of light emitting elements are provided, an inclined surface is formed on a light guide plate as a reflection surface, and a light is converged in the liquid-crystal-panel direction using the reflection surface. In a liquid crystal display device which includes a backlight for radiating a light toward a liquid crystal panel, LEDs are formed on the light guide plate which is mounted on the backlight as light emitting elements. The plurality of LEDs are arranged along a side surface of the light guide plate, and a first reflection surface and a second reflection surface are formed on a bottom surface of the light guide plate. The second reflection surface is arranged closer to the LEDs than the first reflection surface and an angle of the second reflection surface is set larger than an angle of the first reflection surface.
    Type: Application
    Filed: December 20, 2007
    Publication date: July 10, 2008
    Inventors: Yasuhisa Shiraishi, Akiyoshi Tobe, Nobuyuki Koganezawa
  • Publication number: 20080007673
    Abstract: A liquid-crystal display device is provided which includes: a display panel; a backlight that applies light onto the display panel; a light emitting device of the backlight; a light guide into which the light from the light emitting device comes; and a mold around the light guide, wherein the mold reflects the light from the light emitting device.
    Type: Application
    Filed: June 26, 2007
    Publication date: January 10, 2008
    Inventors: Yasuhisa Shiraishi, Seiichi Nishiyama
  • Patent number: 7295263
    Abstract: A display device suitable for a game machine has dot printed films which are printed on a light guide plate which constitutes a backlight for illuminating a liquid crystal display panel. The dots of the dot printed films are arranged more densely in a window-frame portion corresponding region, which faces a display region of the liquid crystal display panel, and in the vicinity of an inner periphery of a transmission portion corresponding to a region which faces a transmission region.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: November 13, 2007
    Assignees: Hitachi Displays, Ltd., Hitachi Displays Devices, Ltd.
    Inventors: Yasuhisa Shiraishi, Hisao Hirayama, Akio Tezuka, Makoto Hasegawa
  • Publication number: 20050024555
    Abstract: A display device suitable for a game machine has dot printed films which are printed on a light guide plate which constitutes a backlight for illuminating a liquid crystal display panel. The dots of the dot printed films are arranged more densely in a window-frame portion corresponding region, which faces a display region of the liquid crystal display panel, and in the vicinity of an inner periphery of a transmission portion corresponding to a region which faces a transmission region.
    Type: Application
    Filed: July 30, 2004
    Publication date: February 3, 2005
    Inventors: Yasuhisa Shiraishi, Hisao Hirayama, Akio Tezuka, Makoto Hasegawa
  • Patent number: 6476544
    Abstract: A color cathode ray tube includes an electron gun having cathode structures arrayed in line with a cup-shaped first grid electrode. Each of the cathode structures is fused and fixed to a cathode in an electrically insulated state by hermetic glass. A cathode support to which the cathode structures are fixed by glass is fixedly housed in the cup-shaped first grid electrode, and the first grid electrode and the cathode support are welded on an axis along which the cathode structures are arrayed. The cathode structures and the first grid electrode are welded on an inline axis so that the thermal deformation of the cathode support can be made uniform at the center portion and at side portions. Accordingly, at the start-up time of the color cathode ray tube, the cathode currents at the center portion and at the side portions can be equalized and a good color balance can be maintained on the screen.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: November 5, 2002
    Assignees: Hitachi, Ltd., Hitachi Electronic Devices Co., Ltd.
    Inventors: Sakae Ishii, Yasuhisa Shiraishi, Satoru Miyamoto
  • Patent number: 5983951
    Abstract: A wear-resistant and corrosion-resistant loom part comprises a Fe--Cr based alloy or a Fe--Cr--Ni based alloy, which has a substantially dual-phase structure comprising a ferrite phase and a martensite phase. The Fe--Cr based alloy preferably contains 10 to 20% by weight Cr, and contains 5 to 70 volume % of the ferrite phase in its structure. The Fe--Cr--Ni based alloy preferably contains 10 to 30% by weight of Cr, 0.01 to 15% by weight of Ni, and 5 to 70 volume % of the ferrite phase in its structure. The maximum crystal particle diameter of the Fe--Cr based alloy or the Fe--Cr--Ni based alloy is preferably 20 .mu.m or less. The loom part is preferably formed of either a dent of a reed or a heddle.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: November 16, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Junji Taniguchi, Kazuya Tsujimoto, Hideo Koizumi, Yasuhisa Shiraishi
  • Patent number: 5872423
    Abstract: A color cathode ray tube includes a panel portion having a phosphor screen on its inside surface and suspending a shadow mask hanged closely spaced from the phosphor screen, a neck portion for housing an electron gun, and a funnel portion for connecting the panel portion to the neck portion. The electron gun is composed of a first plurality of grid electrodes spaced specified distances apart and arranged axially in a specified order, respectively, and fixed by insulating rods embedding the first plurality of grid electrodes therein, including a cup-shaped first grid electrode having a second plurality of in-line electron beam apertures in a bottom thereof and having the second plurality of cathodes incorporated therein. The cup-shaped first grid electrode is embedded in the insulating rods through metal tabs fixed thereto, and a thermal expansion coefficient T1 of the metal tabs and a thermal expansion coefficient T2 of the cup-shaped first grid electrode satisfy the following inequality, T1>T2.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: February 16, 1999
    Assignees: Hitachi, Ltd., Hitachi Electronic Devices Co., Ltd.
    Inventors: Yasuhisa Shiraishi, Shinichi Ishinagawa, Sakae Ishii
  • Patent number: 4634635
    Abstract: An ornament coated with silicon carbide having black luster which has been formed by chemical vapor deposition aided by D.C. glow discharge using hydrogen, a silicon compound and a hydrocarbon.The black ornament according to the present invention is very suitable for a case of a watch, a frame of eyeglasses and so on.
    Type: Grant
    Filed: September 27, 1984
    Date of Patent: January 6, 1987
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuhisa Shiraishi, Takashi Fujita, Yoshiharu Ochi, Masahiko Hirose, Katsutarou Ichihara, Takashi Ishigami