Patents by Inventor Nobuyuki Koganezawa

Nobuyuki Koganezawa 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: 8848135
    Abstract: The liquid crystal display device has a liquid crystal display panel, a backlight for illuminating the liquid crystal display panel where the outer shape of the backlight in a plane has at least one corner of which the angle is greater than 90°, and a light guide plate LG having approximately the same form as the outer shape of the backlight, wherein a number of light emitting diodes are aligned along two sides (s1, s3) of the light guide plate LG that form a corner A of which the angle is greater than 90°, and the main light for illumination (L2 to L4, L6 and L7) from the light emitting diodes aligned along the two sides propagates through the light guide plate LG in the same direction.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: September 30, 2014
    Assignee: Japan Display Inc.
    Inventor: Nobuyuki Koganezawa
  • Patent number: 8786798
    Abstract: The present invention provides a liquid crystal display device having a liquid crystal display panel of which the outer shape in a plane has at least one corner that is not 90° (dotted line A), and is characterized in that cushion tapes (CT3, CT4) are placed along the sides of the outer shape of the liquid crystal display panel between the liquid crystal display panel LCP and a frame for supporting the liquid crystal display panel, and the cushion tapes along the two sides connected to the above-described corner that is not 90° are made to make contact with each other, and the width of an end of the cushion tape along at least one side is smaller than the width of the cushion tape along the middle of the side.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: July 22, 2014
    Assignee: Japan Display Inc.
    Inventor: Nobuyuki Koganezawa
  • Patent number: 8643803
    Abstract: The liquid crystal display device is a liquid crystal display device having: a light guide plate for converting light from a light source into backlight for illumination; a first frame for containing the light guide plate; and a liquid crystal display panel provided over said light guide plate, wherein the liquid crystal display device further has a photosensor that is placed so as to face a sidewall of the light guide plate and detect an amount of the backlight, and the photosensor is placed so as to face the sidewall of the light guide plate through a hole or a notch created in a sidewall portion of the first frame.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: February 4, 2014
    Assignee: Japan Display Inc.
    Inventors: Hiroyuki Miyazaki, Akio Miyauchi, Nobuyuki Koganezawa
  • Patent number: 8462289
    Abstract: A liquid crystal display panel formed by using a TFT substrate and a color filter substrate is polished to decrease the thickness thereof so that it can be curved. The liquid crystal display panel and various optical sheets are sandwiched between a frame forming a curved surface and a light guide plate forming a curved surface, to thereby form a curved surface. An upper polarizer plate and a lower polarizer plate are, respectively, sandwiched between the surface cover and the liquid crystal display panel, and between the liquid crystal display panel and the optical sheet, and are not adhered or are partly adhered to the liquid crystal display panel.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: June 11, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Shigeki Nishizawa, Nobuyuki Koganezawa, Fuimiyuki Sato
  • Publication number: 20120224117
    Abstract: The liquid crystal display device is a liquid crystal display device having: a light guide plate for converting light from a light source into backlight for illumination; a first frame for containing the light guide plate; and a liquid crystal display panel provided over said light guide plate, wherein the liquid crystal display device further has a photosensor that is placed so as to face a sidewall of the light guide plate and detect an amount of the backlight, and the photosensor is placed so as to face the sidewall of the light guide plate through a hole or a notch created in a sidewall portion of the first frame.
    Type: Application
    Filed: March 1, 2012
    Publication date: September 6, 2012
    Inventors: Hiroyuki MIYAZAKI, Akio Miyauchi, Nobuyuki Koganezawa
  • Publication number: 20120224122
    Abstract: The liquid crystal display device has a liquid crystal display panel, a backlight for illuminating the liquid crystal display panel where the outer shape of the backlight in a plane has at least one corner of which the angle is greater than 90°, and a light guide plate LG having approximately the same form as the outer shape of the backlight, wherein a number of light emitting diodes are aligned along two sides (s1, s3) of the light guide plate LG that form a corner A of which the angle is greater than 90°, and the main light for illumination (L2 to L4, L6 and L7) from the light emitting diodes aligned along the two sides propagates through the light guide plate LG in the same direction.
    Type: Application
    Filed: February 29, 2012
    Publication date: September 6, 2012
    Inventor: Nobuyuki KOGANEZAWA
  • Publication number: 20120218492
    Abstract: The present invention provides a liquid crystal display device having a liquid crystal display panel of which the outer shape in a plane has at least one corner that is not 90° (dotted line A), and is characterized in that cushion tapes (CT3, CT4) are placed along the sides of the outer shape of the liquid crystal display panel between the liquid crystal display panel LCP and a frame for supporting the liquid crystal display panel, and the cushion tapes along the two sides connected to the above-described corner that is not 90° are made to make contact with each other, and the width of an end of the cushion tape along at least one side is smaller than the width of the cushion tape along the middle of the side.
    Type: Application
    Filed: February 23, 2012
    Publication date: August 30, 2012
    Inventor: Nobuyuki KOGANEZAWA
  • Patent number: 8208094
    Abstract: A display device includes a display panel including a substrate having electrodes for forming pixels therein, and a backlight which irradiates light to a rear surface of the display panel. The backlight has a plurality of light-emitting elements, a circuit substrate on which the plurality of light-emitting elements are arranged in array. A resin material is filled around sides of the plurality of light-emitting elements.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: June 26, 2012
    Assignees: Hitachi Display, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Nobuyuki Koganezawa
  • Patent number: 8111347
    Abstract: A liquid crystal display device which can prevent lowering of characteristics thereof when a liquid crystal display panel is bent is provided. A liquid crystal display device includes: a bent liquid crystal display panel which includes a first substrate and a second substrate which are fixed to each other by a sealing material, and liquid crystal which is hermetically filled in a space defined between the first substrate and the second substrate; and pressing members which press the first substrate and the second substrate in the direction that the first substrate and the second substrate come closer to each other. The liquid crystal display panel includes a straight line on a surface thereof and is bent along a bent line which surrounds an axis arranged parallel to the straight line. The sealing material includes non-bent portions which extend along the straight line and are not bent, and bent portions which extend along the bent line.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: February 7, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Nobuyuki Koganezawa
  • Patent number: 7999887
    Abstract: A liquid crystal display device includes a display panel, a backlight which radiates light to the display panel, a light emitting element which is mounted on the backlight, and a light guide plate on which light from the light emitting element is incident. The light guide plate has an upper surface and a bottom surface. The bottom surface has grooves formed therein delimited by at least one surface which extends at a slant with respect to the bottom surface. A reflection sheet is provided which reflects the light radiated from the bottom surface. The grooves are formed to produce a first light which is reflected on the grooves and a second light which is radiated from the grooves and is reflected on the reflection sheet, and an asymmetric prism sheet is arranged on the light guide plate.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: August 16, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yasuhisa Shiraishi, Akiyoshi Tobe, Nobuyuki Koganezawa
  • Publication number: 20110128468
    Abstract: A display device includes a display panel including a substrate having electrodes for forming pixels therein, and a backlight which irradiates light to a rear surface of the display panel. The backlight has a plurality of light-emitting elements, a circuit substrate on which the plurality of light-emitting elements are arranged in array. A resin material is filled around sides of the plurality of light-emitting elements.
    Type: Application
    Filed: February 4, 2011
    Publication date: June 2, 2011
    Inventor: Nobuyuki Koganezawa
  • Patent number: 7920223
    Abstract: A liquid crystal display panel formed by using a TFT substrate and a color filter substrate is polished to decrease the thickness thereof so that it can be curved. The liquid crystal display panel and various optical sheets are sandwiched between a frame forming a curved surface and a light guide plate forming a curved surface, to thereby form a curved surface. An upper polarizer plate and a lower polarizer plate are, respectively, sandwiched between the surface cover and the liquid crystal display panel, and between the liquid crystal display panel and the optical sheet, and are not adhered or are partly adhered to the liquid crystal display panel.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: April 5, 2011
    Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.
    Inventors: Shigeki Nishizawa, Nobuyuki Koganezawa, Fuimiyuki Sato
  • Patent number: 7903196
    Abstract: A panel unit is formed by sandwiching a liquid crystal display panel and a diffusion sheet between a front surface plate having a curved plane and a back surface plate having a curved plane. A light source unit is arranged on a back surface of the panel unit. The diffusion sheet is formed into an outward convex shape in the same manner as the liquid crystal display panel and hence, due to a lens action of the diffusion sheet, light from the light source unit is collected in the direction toward the center of a screen. Accordingly, it is possible to suppress a phenomenon that brightness in a periphery of the screen is reduced when the screen is viewed from a front side.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: March 8, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventor: Nobuyuki Koganezawa
  • Patent number: 7903197
    Abstract: The present invention provides a liquid crystal display device having a linear light source, which is easily treated, in consideration of the heat radiation of a light-emitting diode in the liquid crystal display using the light-emitting diode as a light source. A light-emitting diode 150 is provided on a metal substrate 161. The metal substrate 161 is formed in a case shape such that the heat generated at the light-emitting diode 150 received in the case is efficiently radiated. A resin material 175 is filled in the metal case to form a plate-shaped light source 130. It is possible to improve reliability during the handling in the manufacturing process by filling the resin material 175 to form the plate-shaped light source. It is possible to improve heat radiation effect by filling the resin material 157.
    Type: Grant
    Filed: April 6, 2007
    Date of Patent: March 8, 2011
    Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.
    Inventor: Nobuyuki Koganezawa
  • Publication number: 20110019135
    Abstract: A panel unit is formed by sandwiching a liquid crystal display panel and a diffusion sheet between a front surface plate having a curved plane and a back surface plate having a curved plane. A light source unit is arranged on a back surface of the panel unit. The diffusion sheet is formed into an outward convex shape in the same manner as the liquid crystal display panel and hence, due to a lens action of the diffusion sheet, light from the light source unit is collected in the direction toward the center of a screen. Accordingly, it is possible to suppress a phenomenon that brightness in a periphery of the screen is reduced when the screen is viewed from a front side.
    Type: Application
    Filed: September 28, 2010
    Publication date: January 27, 2011
    Inventor: Nobuyuki Koganezawa
  • Publication number: 20110019129
    Abstract: A liquid crystal display panel formed by using a TFT substrate and a color filter substrate is polished to decrease the thickness thereof so that it can be curved. The liquid crystal display panel and various optical sheets are sandwiched between a frame forming a curved surface and a light guide plate forming a curved surface, to thereby form a curved surface. An upper polarizer plate and a lower polarizer plate are, respectively, sandwiched between the surface cover and the liquid crystal display panel, and between the liquid crystal display panel and the optical sheet, and are not adhered or are partly adhered to the liquid crystal display panel.
    Type: Application
    Filed: September 23, 2010
    Publication date: January 27, 2011
    Inventors: Shigeki Nishizawa, Nobuyuki Koganezawa, Fuimiyuki Sato
  • Publication number: 20100328581
    Abstract: A liquid crystal display device includes a display panel, a backlight which radiates light to the display panel, a light emitting element which is mounted on the backlight, and a light guide plate on which light from the light emitting element is incident. The light guide plate has an upper surface and a bottom surface. The bottom surface has grooves formed therein delimited by at least one surface which extends at a slant with respect to the bottom surface. A reflection sheet is provided which reflects the light radiated from the bottom surface. The grooves are formed to produce a first light which is reflected on the grooves and a second light which is radiated from the grooves and is reflected on the reflection sheet, and an asymmetric prism sheet is arranged on the light guide plate.
    Type: Application
    Filed: September 8, 2010
    Publication date: December 30, 2010
    Inventors: Yasuhisa SHIRAISHI, Akiyoshi TOBE, Nobuyuki KOGANEZAWA
  • Patent number: 7847912
    Abstract: A liquid crystal display panel includes a TFT substrate and a color filter substrate respectively formed of a glass substrate. By housing the liquid crystal display panel in the inside of a frame having a curved surface, a predetermined curved surface is imparted to a display screen. Using a direct backlight having a plurality of fluorescent lamps, distances between the respective fluorescent lamps and the liquid crystal display panel are set to a fixed value. A diffusion plate has a curved surface substantially equal to the display screen. By mounting respective optical sheets on the diffusion plate, predetermined curved surfaces are imparted to the respective optical sheets. Due to such constitution, it is possible to realize a liquid crystal display device having a curved surface without using a complicated optical system.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: December 7, 2010
    Assignees: Hitachi Displays, Ltd., Hitachi Displays Devices, Ltd.
    Inventors: Shigeki Nishizawa, Nobuyuki Koganezawa, Fumiyuki Sato
  • Patent number: 7826006
    Abstract: A panel unit is formed by sandwiching a liquid crystal display panel and a diffusion sheet between a front surface plate having a curved plane and a back surface plate having a curved plane. A light source unit is arranged on a back surface of the panel unit. The diffusion sheet is formed in to an outward convex shape in the same manner as the liquid crystal display panel and hence, due to a lens action of the diffusion sheet, light from the light source unit is collected in the direction toward the center of a screen. Accordingly, it is possible to suppress a phenomenon that brightness in a periphery of the screen is reduced when the screen is viewed from a front side.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: November 2, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventor: Nobuyuki Koganezawa
  • Patent number: 7796213
    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: Grant
    Filed: December 20, 2007
    Date of Patent: September 14, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Yasuhisa Shiraishi, Akiyoshi Tobe, Nobuyuki Koganezawa