Patents by Inventor Yi-Feng Liao

Yi-Feng Liao 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: 20240079524
    Abstract: A semiconductor device comprises a first semiconductor structure, a second semiconductor structure located on the first semiconductor structure, and an active layer located between the first semiconductor structure and the second semiconductor structure. The first semiconductor structure has a first conductivity type, and includes a plurality of first layers and a plurality of second layers alternately stacked. The second semiconductor structure has a second conductivity type opposite to the first conductivity type. The plurality of first layers and the plurality of second layers include indium and phosphorus, and the plurality of first layers and the plurality of second layers respectively have a first indium atomic percentage and a second indium atomic percentage. The second indium atomic percentage is different from the first indium atomic percentage.
    Type: Application
    Filed: September 6, 2023
    Publication date: March 7, 2024
    Inventors: Wei-Jen HSUEH, Shih-Chang LEE, Kuo-Feng HUANG, Wen-Luh LIAO, Jiong-Chaso SU, Yi-Chieh LIN, Hsuan-Le LIN
  • Patent number: 8233583
    Abstract: A shift register and a display driver thereof are provided. The display driver submitted by the present invention can be directly disposed on a glass substrate of a liquid crystal display (LCD) panel to replace a scan driver commonly used in prior art, so that the cost of the liquid crystal display can be reduced. In addition, the stress taken by the output stage transistor of each shift register stage within the display driver submitted by the present invention can be reduced. Thus, each shift register stage has the highest reliability, and may consequently avoid the erroneous actions when each shift register stage is operated for a long time.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: July 31, 2012
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Cheng-Hung Tsai, Yi-Feng Liao, Chun-Yuan Hsu
  • Publication number: 20090231315
    Abstract: A shift register and a display driver thereof are provided. The display driver submitted by the present invention can be directly disposed on a glass substrate of a liquid crystal display (LCD) panel to replace a scan driver commonly used in prior art, so that the cost of the liquid crystal display can be reduced. In addition, the stress taken by the output stage transistor of each shift register stage within the display driver submitted by the present invention can be reduced. Thus, each shift register stage has the highest reliability, and may consequently avoid the erroneous actions when each shift register stage is operated for a long time.
    Type: Application
    Filed: November 3, 2008
    Publication date: September 17, 2009
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventors: Cheng-Hung Tsai, Yi-Feng Liao, Chun-Yuan Hsu
  • Patent number: 7508902
    Abstract: A shift register including a plurality of stage circuits is provided. Each of the stage circuits has a shift circuit for receiving an input signal and providing an output signal. The output signal is obtained through the logic calculation and delaying of the input signal. Each of the stage circuits, except the first one, further includes a logic circuit used to produce at least one control signal according to the internal signals of the containing stage circuit, so as to replace at least one of the required clock signals during the operation of the corresponding shift circuit.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: March 24, 2009
    Assignee: Chunghwa Picture Tubes Ltd.
    Inventors: Cheng-Hung Tsai, Chun-Yao Huang, Yi-Feng Liao
  • Publication number: 20080013669
    Abstract: A shift register including a plurality of stage circuits is provided. Each of the stage circuits has a shift circuit for receiving an input signal and providing an output signal. The output signal is obtained through the logic calculation and delaying of the input signal. Each of the stage circuits, except the first one, further includes a logic circuit used to produce at least one control signal according to the internal signals of the containing stage circuit, so as to replace at least one of the required clock signals during the operation of the corresponding shift circuit.
    Type: Application
    Filed: July 17, 2006
    Publication date: January 17, 2008
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventors: Cheng-Hung Tsai, Chun-Yao Huang, Yi-Feng Liao