Patents by Inventor Toshihiko Takakura

Toshihiko Takakura 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: 7173644
    Abstract: An optical printhead includes a light source, a light guide, and a light collecting sheet. The light guide includes a light incident surface facing the light source and a flat light emitting surface extending in a primary scanning direction. The light collecting sheet faces the light emitting surface of the light guide and allows the passage of light emitted from the light emitting surface. The collecting sheet includes a prism layer formed with a plurality of ridges extending parallel to each other, and a base layer laminated on the prism layer. Diffused light rays emitted from the light emitting surface of the light guide pass through the light collecting sheet to become parallel rays.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: February 6, 2007
    Assignee: Rohm Co., Ltd.
    Inventor: Toshihiko Takakura
  • Patent number: 7170569
    Abstract: The present invention relates to a liquid crystal shutter (5). The liquid crystal shutter (5) includes a first and a second transparent substrates (50), (51) arranged to face each other; a light shielding film (52) formed on a surface (511) of the second transparent substrate (51), which faces the first transparent substrate (50), for restricting incidence of light travelling from the first transparent substrate (50) to the second transparent substrate (51); and transparent electrodes (54b) laminated over the light shielding film (52). The transparent electrodes (54b) are laminated over the light shielding film (52) via a single insulating layer (53b). Each of the transparent electrodes (54b), the light shielding film (52) and the insulating layer (53b) is made of an inorganic substance.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: January 30, 2007
    Assignee: Rohm Co., Ltd.
    Inventor: Toshihiko Takakura
  • Patent number: 7156569
    Abstract: A wall-mounting image processing apparatus (A) includes a machine housing (90) mounted on a substantially vertical wall surface (H), and an image reading/writing head (X) disposed in the machine housing. The image reading/writing head (X) includes a substrate (4) having one surface (4A) on which a plurality of light receiving elements (4a) are arranged in a row. Part of said one surface (4A) forms an excess surface (49) projecting laterally from a head case (1), and the printing elements (4b) are arranged on the excess surface (49).
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: January 2, 2007
    Assignee: Rohm Co., Ltd.
    Inventors: Hisayoshi Fujimoto, Hiroaki Onishi, Toshihiko Takakura, Norihiro Imamura
  • Patent number: 6952289
    Abstract: The integrated image reading/writing head (X) includes a substrate (4) having a surface (40) provided with a reading circuit including a plurality of light receiving elements (20), a plurality of printing elements (60) and a writing circuit for controlling the printing elements (60). The substrate (4) is fitted with a connector (8) for electrical wiring. The connector (8) is electrically connected with each of the reading circuit, the printing elements and the writing circuit.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: October 4, 2005
    Assignee: Rohm Co., Ltd.
    Inventors: Hisayoshi Fujimoto, Hiroaki Onishi, Toshihiko Takakura, Norihiro Imamura
  • Patent number: 6952273
    Abstract: The image processing apparatus (B) includes an integrated image-reading/writing head (A), platen rollers (P1, P2) for a document and a recording paper, and data processor (7) performing data processing necessary for copying an image on the document. The integrated image-reading/writing head (A), a plurality of light receiving elements (20) and a plurality of printing elements (8) are mounted on the same surface of a substrate (4). If the document (D) and the recording paper (K) are fed in the same direction, when the image on the document is copied, the pixel data outputted for the printing are arranged in the order of first to n-th. If the document (D) and the recording paper (K) are fed in opposite directions to each other, the pixel data outputted for the printing are arranged in the order of n-th to first.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: October 4, 2005
    Assignee: Rohm Co., Ltd.
    Inventors: Hisayoshi Fujimoto, Hiroaki Onishi, Toshihiko Takakura, Norihiro Imamura
  • Publication number: 20050062840
    Abstract: An optical printhead includes a light source, a light guide, and a light collecting sheet. The light guide includes a light incident surface facing the light source and a flat light emitting surface extending in a primary scanning direction. The light collecting sheet faces the light emitting surface of the light guide and allows the passage of light emitted from the light emitting surface. The collecting sheet includes a prism layer formed with a plurality of ridges extending parallel to each other, and a base layer laminated on the prism layer. Diffused light rays emitted from the light emitting surface of the light guide pass through the light collecting sheet to become parallel rays.
    Type: Application
    Filed: February 23, 2004
    Publication date: March 24, 2005
    Applicant: ROHM CO., LTD.
    Inventor: Toshihiko Takakura
  • Patent number: 6864999
    Abstract: An integrated image-reading/writing head A comprises an oblong rectangular substrate (4) having a first longitudinal edge portion (4c), a second longitudinal edge portion (4d) and a surface (4a) mounted with an array of light receiving elements (2) and an array of drive IC's (80). The surface (4a) of the substrate (4) is fitted with an oblong case (1) enclosing therein the light receiving elements (2) and the drive IC's (80). The first longitudinal edge portion (4c) of the substrate (4) is extended out of the case by a predetermined width. The surface (4a) of the substrate (4) is further mounted with a light source (3) enclosed within the case (1). A plurality of heating elements (8) are mounted on a region of the surface (4a) of the substrate (4) extended out of the case (1).
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: March 8, 2005
    Assignee: Rohm Co., Ltd.
    Inventors: Hisayoshi Fujimoto, Hiroaki Onishi, Toshihiko Takakura, Norihiro Imamura
  • Patent number: 6825865
    Abstract: The present invention relates to a print head (3) including an illuminator (5) for emitting light in a line extending in a primary scanning direction, a liquid crystal shutter (6) for selecting whether or not light traveling from the illuminator (5) is allowed to pass, and a light emitting portion (323) for emitting light traveling from the liquid crystal shutter (6) toward a photosensitive recording medium (22). The liquid crystal shutter (6) includes a plurality of individual shutter portions aligned in the primary scanning direction, for example. Preferably, each of the shutter portions is capable of individually selecting whether or not the light traveling from the illuminator (5) is allowed to pass.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: November 30, 2004
    Assignee: Rohm Co., Ltd.
    Inventors: Hisayoshi Fujimoto, Hiroaki Onishi, Minori Koshio, Toshihiko Takakura
  • Publication number: 20040233272
    Abstract: An image forming apparatus (X) includes a print head (2) provided with a projection (23a) which is offset with respect to a lens (22a) in an secondary scanning direction (CD) and which protrudes beyond the lens (22a) toward the photosensitive recording medium (4) for abutting against the photosensitive recording medium (4). The projection (23a) moving in contact with the photosensitive recording medium (4) during exposure corrects waviness of the photosensitive recording medium (4).
    Type: Application
    Filed: February 27, 2004
    Publication date: November 25, 2004
    Applicant: ROHM CO., LTD.
    Inventors: Hisayoshi Fujimoto, Toshihiko Takakura
  • Publication number: 20040207782
    Abstract: The present invention relates to a liquid crystal shutter (5). The liquid crystal shutter (5) includes a first and a second transparent substrates (50), (51) arranged to face each other; a light shielding film (52) formed on a surface (511) of the second transparent substrate (51), which faces the first transparent substrate (50), for restricting incidence of light travelling from the first transparent substrate (50) to the second transparent substrate (51); and transparent electrodes (54b) laminated over the light shielding film (52). The transparent electrodes (54b) are laminated over the light shielding film (52) via a single insulating layer (53b). Each of the transparent electrodes (54b), the light shielding film (52) and the insulating layer (53b) is made of an inorganic substance.
    Type: Application
    Filed: February 24, 2004
    Publication date: October 21, 2004
    Applicant: ROHM CO., LTD.
    Inventor: Toshihiko Takakura
  • Patent number: 6798479
    Abstract: A liquid crystal display device includes a first and a second substrates (1, 2) disposed in parallel to each other, a liquid crystal layer (3) disposed between the two substrates (1, 2) and filled with liquid crystal, and a reflective electrode (13) having a reflective surface (13a) on which light rays coming from the outside through the first substrate (1) and the liquid crystal layer (3) are reflected towards the first substrate (1). The reflective surface (13a) of the reflective electrode (13) is undulated. The reflective surface (13a) of the reflective electrode (13) is provided with an alignment film (14B) for twisting liquid crystal molecules contained in the liquid crystal layer (3). The height of the undulation on the reflective surface (13a) of the reflective electrode (13) is smaller than at least the thickness of the alignment film (14B) at a concave portion of the undulated reflective surface (13a).
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: September 28, 2004
    Assignee: Rohm Co., Ltd.
    Inventors: Hisayoshi Fujimoto, Norihiro Imamura, Toshihiko Takakura
  • Publication number: 20040080559
    Abstract: The present invention relates to a print head (3) including an illuminator (5) for emitting light in a line extending in a primary scanning direction, a liquid crystal shutter (6) for selecting whether or not light traveling from the illuminator (5) is allowed to pass, and a light emitting portion (323) for emitting light traveling from the liquid crystal shutter (6) toward a photosensitive recording medium (22). The liquid crystal shutter (6) includes a plurality of individual shutter portions aligned in the primary scanning direction, for example. Preferably, each of the shutter portions is capable of individually selecting whether or not the light traveling from the illuminator (5) is allowed to pass.
    Type: Application
    Filed: January 16, 2003
    Publication date: April 29, 2004
    Applicant: ROHM CO., LTD.
    Inventors: Hisayoshi Fujimoto, Hiroaki Onishi, Minori Koshio, Toshihiko Takakura
  • Patent number: 6707613
    Abstract: A lens array unit includes first and second lens arrays cooperative with each other. The first lens array is provided with a plurality of first convex lenses and a first transparent holder formed integral with the first lenses. Each of the first lenses has first and second lens surfaces. The second lens array is provided with a plurality of second convex lenses and a second transparent holder formed integral with the second lenses Each of the second lenses has third and fourth lens surfaces. The second lens array is attached to the first lens array so that the third lens surfaces face the second lens surfaces. The lens array unit further includes a light shield mounted on the first lens array. The light shield is formed with a plurality of through-holes each facing the relevant one of the first lens surfaces.
    Type: Grant
    Filed: April 3, 2001
    Date of Patent: March 16, 2004
    Assignee: Rohm Co., Ltd.
    Inventors: Hisayoshi Fujimoto, Toshihiko Takakura, Norihiro Imamura, Minori Torama
  • Patent number: 6693748
    Abstract: A lens array unit (U1) comprises a first and a second lens arrays (1, 2). The first and the second lens arrays (1, 2) include respectively a plurality of lenses (11, 21), each serving as a convex lens, for formation of a non-inverted, non-magnified image. In each of the lens arrays, the lenses (11, 21) and supports (10, 20) which hold the lenses are formed integrally of a translucent resin. Therefore, manufacture of the lens array is easy.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: February 17, 2004
    Assignee: Rohm Co., Ltd.
    Inventors: Hisayoshi Fujimoto, Toshihiko Takakura, Norihiro Imamura
  • Publication number: 20030038906
    Abstract: A liquid crystal display device includes a first and a second substrates (1, 2) disposed in parallel to each other, a liquid crystal layer (3) disposed between the two substrates (1, 2) and filled with liquid crystal, and a reflective electrode (13) having a reflective surface (13a) on which light rays coming from the outside through the first substrate (1) and the liquid crystal layer (3) are reflected towards the first substrate (1). The reflective surface (13a) of the reflective electrode (13) is undulated. The reflective surface (13a) of the reflective electrode (13) is provided with an alignment film (14B) for twisting liquid crystal molecules contained in the liquid crystal layer (3). The height of the undulation on the reflective surface (13a) of the reflective electrode (13) is smaller than at least the thickness of the alignment film (14B) at a concave portion of the undulated reflective surface (13a).
    Type: Application
    Filed: June 19, 2002
    Publication date: February 27, 2003
    Applicant: ROHM CO., LTD.
    Inventors: Hisayoshi Fujimoto, Norihiro Imamura, Toshihiko Takakura
  • Patent number: 6501115
    Abstract: A plurality of first contact holes reaching an n+-type semiconductor area used as the source of a MISFET employed in a logic-DRAM mixture LSI and a plurality of second contact holes reaching another n+-type semiconductor area used as the drain of the MISFET are bored through an insulation layer created over a gate electrode of the MISFET. A conductive film on the same layer as a bit line shunts the n+-type semiconductor area used as the source through the first contact holes. Another conductive film shunts the n+-type semiconductor area used as the drain through the second contact holes.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: December 31, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Yoshida, Katsuyuki Asaka, Toshihiko Takakura
  • Patent number: 6496285
    Abstract: An image reading apparatus is provided which includes a cold-cathode tube for irradiating a linearly extending image reading section, and a plurality of light receiving elements for receiving light reflected at the image reading section. The cold-cathode tube is provided with a first end portion, a second end portion, and an intermediate portion arranged between the first end portion and the second end portion. At least one of the first and the second end portions extends in a direction differing from another direction in which the intermediate portion extends. The image reading apparatus is also provided with a suitable number of shield members for preventing relatively weak image signals supplied by the light reading elements from being adversely influenced by electrical noises.
    Type: Grant
    Filed: February 24, 1999
    Date of Patent: December 17, 2002
    Assignee: Rohm Co., Ltd.
    Inventors: Hisayoshi Fujimoto, Hiroaki Onishi, Toshihiko Takakura
  • Publication number: 20020180907
    Abstract: A liquid crystal display includes a liquid crystal layer, a holding assembly for internally holding the liquid crystal layer, and a diffusion mollifying layer that reduces the diffusion of light entering into the assembly. The holding assembly includes a plate having a rugged surface resulting from a surface-roughening process. The rugged surface is covered by the diffusion mollifying layer to reduce the frequency of light diffusion.
    Type: Application
    Filed: April 29, 2002
    Publication date: December 5, 2002
    Applicant: ROHM CO., LTD.
    Inventors: Norihiro Imamura, Hisayoshi Fujimoto, Toshihiko Takakura
  • Patent number: 6473206
    Abstract: An image scanner is provided which includes a housing, a document supporting panel fixed to the housing, a movable carriage arranged under the document supporting panel, a light source supported by the carriage for illuminating a document placed on the document supporting panel. The image scanner also includes first reflecting means supported by the carriage and second reflecting means mounted on the housing. Further, the image scanner includes third reflecting means mounted on the housing, a focusing lens supported by the carriage and a line sensor supported by the carriage.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: October 29, 2002
    Assignee: Rohm Co., Ltd.
    Inventors: Hisayoshi Fujimoto, Toshihiko Takakura
  • Patent number: 6449099
    Abstract: A lens array is provided with a plurality of lenses and a holder formed integral with the lenses. Each of the lenses includes a non-flat first lens surface and a flat second lens surface. The holder includes a first surface adjacent to the first lens surface and a second surface adjacent to the second lens surface. The second surface is formed with a plurality of recesses in each of which a light shielding layer is provided.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: September 10, 2002
    Assignee: Rohm Co., Ltd.
    Inventors: Hisayoshi Fujimoto, Toshihiko Takakura