Patents by Inventor Hirokazu Sakaguchi

Hirokazu Sakaguchi 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: 20020015128
    Abstract: An LCD driver (liquid crystal display driver) IC chip 10 has an internal semiconductor device circuit including an input circuit 11 for inputting data, random access memory (RAM) 12 as a memory section, a logic circuit 13 as a data processing section, and an output circuit 14 including a latch circuit and outputting signals, in connection with each other. A bump electrode 15 is provided so as to correspond to input and output pads. Each bump electrode 15 is arranged so as to lie above some transistor devices (not shown in the drawing) in the input circuit 11 or the output circuit 14 and is provided with an insulating interlayer (not shown in the drawing) therebetween.
    Type: Application
    Filed: June 20, 2001
    Publication date: February 7, 2002
    Inventor: Hirokazu Sakaguchi
  • Publication number: 20020003704
    Abstract: The present invention provides a color wheel assembly comprising a color wheel which is divided into plural color regions, and a motor for rotating the color wheel, in which the position of the color wheel can be detected accurately even at high-speed rotation or at elevated temperatures. A Hall IC 27 as a magnetic sensor is provided inside of a motor 2. Every time a detecting magnet 28 which is provided at a rotor part 6 rotates and passes through the Hall IC 27 as the magnetic sensor, a pulse signal is generated by magnetoelectric conversion characteristics of the Hall IC 27, thereby generating a pulse signal for detecting the position of the color wheel 1 only with the color wheel 1 and the motor 2 for rotating the color wheel.
    Type: Application
    Filed: May 25, 2001
    Publication date: January 10, 2002
    Inventors: Hideki Ohmae, Mitsuhiro Wada, Kazunori Tanabe, Shigeru Aruga, Hirokazu Sakaguchi, Hisatoshi Shimose
  • Publication number: 20010038505
    Abstract: A reflecting film is made by forming resin layers on both sides of a metal thin film, and using a colorless, transparent, and optically isotropic material at least in one resin layer. A reflecting film is made by forming a metal thin film on one side of a resin film, and forming a colorless, transparent, and optically isotropic resin coat layer on its surface by printing or other method. A mirror having such a reflecting film is mounted on a frame. A projection type image magnifying apparatus for liquid crystal panel and a projection type image magnifying apparatus for CRT, improved in resolution and contrast ratio, is obtained by using such mirror as an image reflecting mirror.
    Type: Application
    Filed: June 29, 2001
    Publication date: November 8, 2001
    Inventors: Takehiko Yamashita, Katsuaki Mitani, Hirokazu Sakaguchi
  • Patent number: 6264341
    Abstract: A reflecting film is made by forming resin layers on both sides of a metal thin film, and using a colorless, transparent, and optically isotropic material at least in one resin layer. A reflecting film is made by forming a metal thin film on one side of a resin film, and forming a colorless, transparent, and optically isotropic resin coat layer on its surface by printing or other method. A mirror having such a reflecting film is mounted on a frame. A projection type image magnifying apparatus for liquid crystal panel and a projection type image magnifying apparatus for CRT, improved in resolution and contrast ratio, is obtained by using such mirror as an image reflecting mirror.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: July 24, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takehiko Yamashita, Katsuaki Mitani, Hirokazu Sakaguchi
  • Patent number: 6203162
    Abstract: A reflecting film is made by forming resin layers on both sides of a metal thin film, and using a colorless, transparent, and optically isotropic material at least in one resin layer. A reflecting film is made by forming a metal thin film on one side of a resin film, and forming a colorless, transparent, and optically isotropic resin coat layer on its surface by printing or other method. A mirror having such a reflecting film is mounted on a frame. A projection type image magnifying apparatus for liquid crystal panel and a projection type image magnifying apparatus for CRT, improved in resolution and contrast ratio, is obtained by using such mirror as an image reflecting mirror.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: March 20, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takehiko Yamashita, Katsuaki Mitani, Hirokazu Sakaguchi
  • Patent number: 5831585
    Abstract: A light transmission screen having strong mechanical strength, enhanced image resolution, extremely narrow joints between screens and the like, consisting of a light transmissive panel, a lenticular lens sheet stacked on the light incident side of the light transmissive panel, a Fresnel lens sheet stacked on the light incident side of the lenticular lens sheet and optionally a light transmissive film stacked on the light incident side of the Fresnel lens sheet. The periphery of the light transmissive film or the periphery of the Fresnel lens sheet is joined to the light transmissive panel, resulting in the light transmissive panel, lenticular lens sheet, Fresnel lens sheet and light transmissive film being formed into a single-piece construction.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: November 3, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Satoshi Aoki, Hirokazu Sakaguchi, Katsuaki Mitani
  • Patent number: 5824174
    Abstract: The present invention makes it possible to improve color shift, shading and view angles, to prevent external light absorption and reflection, to enhance external light contrast, to eliminate reflection of external images that appear on a light transmission screen's face plate, and to provide distinct pictures free of the adverse effects of dust. The light transmission screen disclosed by the present invention comprises a Fresnel lens sheet, a transparent lenticular lens sheet arranged on the Fresnel lens sheet's radiant light side and a front diffusion panel formed of a thin diffusion layer and a transparent layer and arranged on the lenticular lens sheet's light radiant side.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: October 20, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Katsuaki Mitani, Hirokazu Sakaguchi, Satoshi Aoki
  • Patent number: 5815313
    Abstract: The present invention makes it possible to improve color shift, shading and view angles, to prevent external light absorption and reflection, to enhance external light contrast, to eliminate reflection of external images that appear on a light transmission screen's face plate, and to provide distinct pictures free of the adverse effects of dust. The light transmission screen disclosed by the present invention comprises a Fresnel lens sheet, a transparent lenticular lens sheet arranged on the Fresnel lens sheet's radiant light side and a front diffusion panel formed of a thin diffusion layer and a transparent layer and arranged on the lenticular lens sheet's light radiant side.
    Type: Grant
    Filed: February 17, 1995
    Date of Patent: September 29, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Katsuaki Mitani, Hirokazu Sakaguchi, Satoshi Aoki
  • Patent number: 5724182
    Abstract: The present invention provides a bright light transmission screen and light diffusion panel. Am amtireflective film is disposed on the surface of a lenticular lens sheet substrate included in a light transmission screen. The antireflective film is made from a high polymer compound of a low refractory index and has a thickness that is different from .lambda./(4n). The antireflective film may also be disposed on a Fresnel lens sheet substrate or a light diffusion panel substrate.
    Type: Grant
    Filed: March 14, 1996
    Date of Patent: March 3, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Katsuaki Mitani, Hirokazu Sakaguchi, Satoshi Aoki
  • Patent number: 5057967
    Abstract: A rolled film capacitor comprising a pair of dielectric film strips piled one upon another and wound into a roll, each strip having a metal electrode pattern deposited on one surface thereof, the pattern including a number of rectangular island electrodes mutually separated by a plurality of lateral and longitudinal insulating gaps and regularly arrayed in both directions, the island electrodes mutually overlapping to form a number of small capacitor elements which are connected in series in both directions by shifting both strips one from another in both directions. A plurality of such capacitors can be aggregated to form an improved large capacitive power supply device.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: October 15, 1991
    Assignee: Nichicon Corporation
    Inventors: Minoru Den, Hirokazu Sakaguchi, Morihiko Hasebe, Shigeyoshi Nishikawa, Masayoshi Kakine, Shusaku Tsujio
  • Patent number: 4131931
    Abstract: A rolled capacitor which includes metal foils interleaved with insulating films and wherein each of the films include metal layer on one side and a roughened surface on the other side.
    Type: Grant
    Filed: February 14, 1978
    Date of Patent: December 26, 1978
    Assignee: Nichicon Capacitor, Ltd.
    Inventors: Shigeyoshi Nishikawa, Takashi Muroshima, Hirokazu Sakaguchi, Morihiko Hasebe, Katsuji Katagiri, Kazuo Inoue