Patents by Inventor Yoshifumi Doi

Yoshifumi Doi 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: 9147370
    Abstract: For an image display apparatus, cost reduction is enabled to prevent display errors while ensuring operational margin to prevent display errors even when the delay time of gate line driving signals is large. A source driver of a liquid-crystal display apparatus includes a data latch circuit for supplying display data to a decode circuit. A gate line inactivation transition detecting circuit detects inactivation of each of a plurality of gate lines and activates a detect signal for a certain period with that timing. The data latch circuit updates the held display data in response to activation of the detect signal.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: September 29, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Youichi Tobita, Yoshifumi Doi, Hiroyuki Murai
  • Publication number: 20110148954
    Abstract: For an image display apparatus, cost reduction is enabled to prevent display errors while ensuring operational margin to prevent display errors even when the delay time of gate line driving signals is large. A source driver of a liquid-crystal display apparatus includes a data latch circuit for supplying display data to a decode circuit. A gate line inactivation transition detecting circuit detects inactivation of each of a plurality of gate lines and activates a detect signal for a certain period with that timing. The data latch circuit updates the held display data in response to activation of the detect signal.
    Type: Application
    Filed: December 8, 2010
    Publication date: June 23, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Youichi Tobita, Yoshifumi Doi, Hiroyuki Murai
  • Patent number: 7345722
    Abstract: A liquid crystal display device includes a single liquid crystal panel in which a liquid crystal material is sealed in a clearance between two transparent substrates, at least one light source, and at least one light-conducting plate. The liquid crystal panel includes a transmitting region and a reflecting region. A part of a first surface of the liquid crystal panel is a first display surface for the transmitting region and a part of a second surface of the liquid crystal panel is a second display surface for the reflecting region. A two-sided display is provided from a single liquid crystal panel and a thin and light-weight liquid crystal display device is achieved.
    Type: Grant
    Filed: December 23, 2004
    Date of Patent: March 18, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yutaka Suzuki, Yoshifumi Doi
  • Publication number: 20050105024
    Abstract: A liquid crystal display device includes a single liquid crystal panel in which a liquid crystal material is sealed in a clearance between two transparent substrates, at least one light source, and at least one light-conducting plate. The liquid crystal panel includes a transmitting region and a reflecting region. A part of a first surface of the liquid crystal panel is a first display surface for the transmitting region and a part of a second surface of the liquid crystal panel is a second display surface for the reflecting region. A two-sided display is provided from a single liquid crystal panel and a thin and light-weight liquid crystal display device is achieved.
    Type: Application
    Filed: December 23, 2004
    Publication date: May 19, 2005
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yutaka Suzuki, Yoshifumi Doi
  • Patent number: 6853418
    Abstract: A liquid crystal display device includes a single liquid crystal panel in which a liquid crystal material is sealed in a clearance between two transparent substrates, at least one light source, and at least one light-conducting plate. The liquid crystal panel includes a transmitting region and a reflecting region. A part of a first surface of the liquid crystal panel is a first display surface for the transmitting region and a part of a second surface of the liquid crystal panel is a second display surface for the reflecting region. A two-sided display is provided from a single liquid crystal panel and a thin and light-weight liquid crystal display device is achieved.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: February 8, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yutaka Suzuki, Yoshifumi Doi
  • Patent number: 6839869
    Abstract: A trace control circuit includes a branch event generation circuit 1 having an address abbreviation information generation circuit 8 for detecting a portion in which a branch-source address and a branch-destination address are overlapped with each other from the upper-bit side of the address data thereof and generating branch-destination address abbreviation information on the basis of the result of the detection, and a trace data abbreviation circuit 5 for performing abbreviation of one part of trace data in accordance with the branch-destination address abbreviation information and outputting the partly abbreviated trace data, whereby the number of data packets of the trace data can be reduced to speed up the output operation of the trace data, and the ability to output trace data in real time can be thereby improved greatly.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: January 4, 2005
    Assignee: Renesas Technology Corp.
    Inventors: Yoshifumi Doi, Teruaki Kanzaki
  • Publication number: 20030160919
    Abstract: A liquid crystal display device including a single liquid crystal panel in which liquid crystal is sealed in a clearance formed between two transparent substrates, at least one light source, and at least one light-conducting plate. The liquid crystal panel includes a transmitting type region and a reflecting type region. A part of one surface of the liquid crystal panel is defined to be a first display surface for the transmitting type region and a part of the other surface of the liquid crystal panel is defined to be a second display surface for the reflecting type region. Both-sided display is enabled by using a single liquid crystal panel and a thin and light-weighted structure of the liquid crystal display device is achieved thereby.
    Type: Application
    Filed: September 4, 2002
    Publication date: August 28, 2003
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yutaka Suzuki, Yoshifumi Doi
  • Publication number: 20020066053
    Abstract: A trace control circuit according to the present invention comprises a branch event generation circuit 1 having an address abbreviation information generation circuit 8 for detecting a portion in which a branch-source address and a branch-destination address are overlapped with each other from the upper-bit side of the address data thereof and generating branch-destination address abbreviation information on the basis of the result of the detection, and a trace data abbreviation circuit 5 for performing abbreviation of one part of trace data in accordance with the branch-destination address abbreviation information and outputting the partly abbreviated trace data, whereby the number of data packets of the trace data can be reduced to speed up the output operation of the trace data, and the ability to output trace data in real time can be thereby improved greatly.
    Type: Application
    Filed: May 8, 2001
    Publication date: May 30, 2002
    Inventors: Yoshifumi Doi, Teruaki Kanzaki