Patents by Inventor RYOHHEI MATSUMOTO

RYOHHEI MATSUMOTO 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).

  • Display device and power supply control method therefor
    Patent number: 10553174
    Abstract: In a display device in which source lines on a display panel are driven from both ends, when a connection confirmation signal (S2) output from a source board (13) indicates abnormality, a power supply circuit (18) on a control board (12) stops outputting a power supply voltage (Va) used when source drivers drive the source lines. The control board (12) outputs a high-level connection confirmation signal (S1) to the source board (13), the source board (13) outputs the connection confirmation signal (S1) to the control board (12) as the connection confirmation signal (S2), and the control board (12) pulls down the connection confirmation signal (S2) to a low level. With this, it is possible to prevent serious damage from occurring even when a connection failure or the like occurs.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: February 4, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takashi Sasaki, Kohji Nagasaka, Kazumasa Hata, Hiroto Suzuki, Satoru Sagawa, Ryohhei Matsumoto
  • DISPLAY DEVICE AND POWER SUPPLY CONTROL METHOD THEREFOR
    Publication number: 20180204533
    Abstract: In a display device in which source lines on a display panel are driven from both ends, when a connection confirmation signal (S2) output from a source board (13) indicates abnormality, a power supply circuit (18) on a control board (12) stops outputting a power supply voltage (Va) used when source drivers drive the source lines. The control board (12) outputs a high-level connection confirmation signal (S1) to the source board (13), the source board (13) outputs the connection confirmation signal (S1) to the control board (12) as the connection confirmation signal (S2), and the control board (12) pulls down the connection confirmation signal (S2) to a low level. With this, it is possible to prevent serious damage from occurring even when a connection failure or the like occurs.
    Type: Application
    Filed: August 19, 2016
    Publication date: July 19, 2018
    Inventors: TAKASHI SASAKI, KOHJI NAGASAKA, KAZUMASA HATA, HIROTO SUZUKI, SATORU SAGAWA, RYOHHEI MATSUMOTO