Patents by Inventor Shuji Aruga

Shuji Aruga 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: 20110205481
    Abstract: A pixel circuit that is connected with a scanning line and a data line includes a first transistor of which a gate electrode is connected with the scanning line and one of a source electrode and a drain electrode is connected with the data line, a second transistor of which a gate electrode is connected with the scanning line, one of a source electrode and a drain electrode is connected with the first transistor, and the other one of the source electrode and the drain electrode is connected with a first node, an auxiliary capacitor connected with a node at which the first transistor and the second transistor are connected to each other, a pixel electrode connected with the first node, a counter electrode opposed to the pixel electrode, liquid crystal held between the pixel electrode and the counter electrode, and a holding capacitor connected with the first node.
    Type: Application
    Filed: February 16, 2011
    Publication date: August 25, 2011
    Applicant: SONY CORPORATION
    Inventors: Shuji Aruga, Norio Koma, Koji Hirosawa
  • Publication number: 20100045903
    Abstract: A liquid crystal device includes a plurality of pixels. Each of the plurality of pixels includes a liquid crystal layer interposed between first and second substrates facing each other and having liquid crystal molecules to be driven by an applied electric field, a first electrode formed on a side of the first substrate facing the second substrate, and a second electrode formed on a side of the first substrate facing the second substrate and interposing an insulating layer together with the first electrode. A reflective display area for reflective display and a transmissive display area for transmissive display are formed within each of the pixels. The liquid crystal molecules have a negative dielectric anisotropy.
    Type: Application
    Filed: August 6, 2009
    Publication date: February 25, 2010
    Applicant: Seiko Epson Corporation
    Inventors: Shuji ARUGA, Norio KOMA
  • Patent number: 6005644
    Abstract: A projection display for preventing reflected light beams produced during optical modulation or light compositing from reinjecting into the modulating liquid crystal panel, as well as to convert projected light or light impinged into a light compositing system into a linearly polarized light beam, thereby projecting high-contrast, high-intensity images with minimal reflection errors.
    Type: Grant
    Filed: March 5, 1996
    Date of Patent: December 21, 1999
    Assignee: Seiko Epson Corporation
    Inventors: Shuji Aruga, Hirosada Horiguchi
  • Patent number: 5241407
    Abstract: A projection-type display device having a single light source which produces light. A first dichroic mirror group receives the light and separates it into colored light. A transmissive light valve system modulates the colored light and a second dichroic mirror group synthesizes the modulated colored light. A projection system projects the synthesized colored light onto a screen.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: August 31, 1993
    Assignee: Seiko Epson Corporation
    Inventors: Tomio Sonehara, Shuji Aruga, Shinji Morozumi
  • Patent number: 5075798
    Abstract: A projection-type display device having a single light source which produces light. A first dichroic mirror group receives the light and separates it into colored light. A transmissive light valve system modulates the colored light and a second dichroic mirror group synthesizaes the modulated colored light. A projection system projects the synthesized colored light onto a screen.
    Type: Grant
    Filed: October 19, 1989
    Date of Patent: December 24, 1991
    Assignee: Seiko Epson Corporation
    Inventors: Tomio Sonehara, Shuji Aruga, Shinji Morozumi
  • Patent number: 5073013
    Abstract: A projection-type display device having a single light source which produces light. A first dichroic mirror group receives the light and separates it into colored light. A transmissive light valve system modulates the colored light and a second dichoric mirror group synthesizes the modulated colored light. A projection system projects the synthesized colored light onto a screen.
    Type: Grant
    Filed: October 19, 1989
    Date of Patent: December 17, 1991
    Assignee: Seiko Epson Corporation
    Inventors: Tomio Sonehara, Shuji Aruga, Shinji Morozumi
  • Patent number: 4995702
    Abstract: A projection-type display device using twisted nematic liquid crystal light valves in which the photoelectric transfer characteristics of three light valves for selectively transmitting red, green and blue light to a synthesizing device are matched. The product of the birefrigence .DELTA.n and thickness d of the twisted nematic liquid crystal and thickness of cell is selected to fall within a predetermined optimal range of values depending upon the wavelength of light which travels therethrough. The thickness d or birefrigence .DELTA.n of the twisted nematic liquid crystal material of each light valve may be the same.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: February 26, 1991
    Assignee: Seiko Epson Corporation
    Inventor: Shuji Aruga
  • Patent number: 4904061
    Abstract: A projection-type display device for producing a faithful colored synthesized image based on equating the luminous intensity distributions and light patterns produced by three twisted nematic liquid crystal light valves for three primary color images. Each light valve includes a twisted nematic liquid crystal composition which is twisted to the right or left depending on the number of times that color light is reflected. Each light valve may include an active switching matrix arranged in mirror-like symmetry with light shield layers also arranged symmetrically.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: February 27, 1990
    Assignee: Seiko Epson Corporation
    Inventor: Shuji Aruga
  • Patent number: 4850685
    Abstract: A projection-type color display device. The display device includes a light source which provides light and a color separation member which receives the light and which separates the received light into the different colors of red, blue and green light. A light valve device receives the red, blue and green light and modulates the light to produce images. A color synthesis cube prism synthesizes the three monochromatic lights modulated by the light valve. A projection lens system projects the synthesized image onto a screen for viewing.
    Type: Grant
    Filed: August 18, 1988
    Date of Patent: July 25, 1989
    Assignee: Seiko Epson Corporation
    Inventors: Hiroshi Kamakura, Tomio Sonehara, Takeshi Ono, Junichi Nakamura, Akitaka Yajima, Shuji Aruga
  • Patent number: RE36725
    Abstract: A projection-type display device having a single light source which produces light. A first dichroic mirror group receives the light and separates it into colored light. A transmissive light valve system modulates the colored light and a second dichroic mirror group synthesizes the modulated colored light. A projection system projects the synthesized colored light onto a screen.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: June 6, 2000
    Assignee: Seiko Epson Corporation
    Inventors: Tomio Sonehara, Shuji Aruga, Shinji Morozumi