Patents by Inventor Chun-Kuo Yu

Chun-Kuo Yu 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: 8269712
    Abstract: A high-reliability gate driving circuit is disclosed for providing a plurality of gate signals to plural gate lines respectively. The gate driving circuit includes a plurality of shift register stages. Each shift register stage includes a pull-up unit, an energy-store unit, a buffer unit, a discharging unit, a first pull-down unit, a second pull-down unit and a control unit. The pull-up unit pulls up a gate signal according to a driving control voltage and a first clock. The buffer unit receives an input signal. The energy-store unit provides the driving control voltage through performing a charging process based on the input signal. The first pull-down unit pulls down the gate signal according to a control signal. The second pull-down unit pulls down the gate signal according to a second clock having a phase opposite to the first clock. The control unit generates the control signal based on the gate signal.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: September 18, 2012
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chih-Jen Shih, Chun-Kuo Yu, Chun-Yuan Hsu
  • Patent number: 8072414
    Abstract: The present invention provides a display method of an active matrix display. First, image data is provided, and the image data is divided into a first image section and a second image section. Next, a first black frame section and a second black frame section are respectively inserted into the first image section and the second image section to form a first frame and a second frame. Then, the first frame and the second frame are displayed in turn so as to display the image data.
    Type: Grant
    Filed: July 20, 2009
    Date of Patent: December 6, 2011
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chun-Kuo Yu, Chien-Ping Ku, Chih-Fan Su
  • Publication number: 20100231496
    Abstract: The present invention provides a display method of an active matrix display. First, image data is provided, and the image data is divided into a first image section and a second image section. Next, a first black frame section and a second black frame section are respectively inserted into the first image section and the second image section to form a first frame and a second frame. Then, the first frame and the second frame are displayed in turn so as to display the image data.
    Type: Application
    Filed: July 20, 2009
    Publication date: September 16, 2010
    Inventors: Chun-Kuo Yu, Chien-Ping Ku, Chih-Fan Su
  • Patent number: 7764761
    Abstract: A shift register apparatus and a method thereof are provided. The technique manner submitted by the present invention utilizes two NMOS transistors for pulling down the voltage level of the scan signals output by the shift registers within the shift register apparatus to the low level gate voltage, wherein one of the NMOS transistors is controlled by a control unit, and the other NMOS transistor is controlled by a clock signal or the inverted clock signal provided to the shift registers. Therefore, shifting amount of the threshold voltage of those NMOS transistors can trend to be flat, and the reliability of those NMOS transistors can be promoted. In addition, since only one control unit is needed to dispose in each shift register so that the layout area of whole shift register apparatus can be reduced, and the panel with narrow frame size also can be achieved by the present invention.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: July 27, 2010
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chih-Jen Shih, Chun-Yuan Hsu, Che-Cheng Kuo, Chun-Kuo Yu
  • Publication number: 20100177068
    Abstract: A high-reliability gate driving circuit is disclosed for providing a plurality of gate signals to plural gate lines respectively. The gate driving circuit includes a plurality of shift register stages. Each shift register stage includes a pull-up unit, an energy-store unit, a buffer unit, a discharging unit, a first pull-down unit, a second pull-down unit and a control unit. The pull-up unit pulls up a gate signal according to a driving control voltage and a first clock. The buffer unit receives an input signal. The energy-store unit provides the driving control voltage through performing a charging process based on the input signal. The first pull-down unit pulls down the gate signal according to a control signal. The second pull-down unit pulls down the gate signal according to a second clock having a phase opposite to the first clock. The control unit generates the control signal based on the gate signal.
    Type: Application
    Filed: May 13, 2009
    Publication date: July 15, 2010
    Inventors: Chih-Jen Shih, Chun-Kuo Yu, Chun-Yuan Hsu
  • Publication number: 20100002827
    Abstract: A shift register apparatus and a method thereof are provided. The technique manner submitted by the present invention utilizes two NMOS transistors for pulling down the voltage level of the scan signals output by the shift registers within the shift register apparatus to the low level gate voltage, wherein one of the NMOS transistors is controlled by a control unit, and the other NMOS transistor is controlled by a clock signal or the inverted clock signal provided to the shift registers. Therefore, shifting amount of the threshold voltage of those NMOS transistors can trend to be flat, and the reliability of those NMOS transistors can be promoted. In addition, since only one control unit is needed to dispose in each shift register so that the layout area of whole shift register apparatus can be reduced, and the panel with narrow frame size also can be achieved by the present invention.
    Type: Application
    Filed: August 7, 2008
    Publication date: January 7, 2010
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventors: Chih-Jen Shih, Chun-Yuan Hsu, Che-Cheng Kuo, Chun-Kuo Yu