Patents by Inventor Yu-Shih Liao

Yu-Shih 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).

  • Patent number: 6642674
    Abstract: A twin dimming controller for backlight system is disclosed. In the present invention, the output of pulse width modulation modulator is used as a reference voltage of error-feedback amplifier and frequency compensation loop in backlight controller having pulse dimming control, and meanwhile, the output of pulse width modulation modulator is sent to the output terminal of error-feedback amplifier and frequency compensation loop. Therefore, by utilizing the present invention, the peaked lamp current and the working period of lamp current are adjusted at the same time for adjusting the output power of lamp, and with the same working period of lamp current, the dimming range is broader, and the minimum power consumption of lamp is decreased substantially.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: November 4, 2003
    Assignee: Quanta Computer Inc.
    Inventors: Yu-Shih Liao, Tsung-Ta Chen, Wen-Hung Huang
  • Publication number: 20020153852
    Abstract: A twin dimming controller for backlight system is disclosed. In the present invention, the output of pulse width modulation modulator is used as a reference voltage of error-feedback amplifier and frequency compensation loop in backlight controller having pulse dimming control, and meanwhile, the output of pulse width modulation modulator is sent to the output terminal of error-feedback amplifier and frequency compensation loop. Therefore, by utilizing the present invention, the peaked lamp current and the working period of lamp current are adjusted at the same time for adjusting the output power of lamp, and with the same working period of lamp current, the dimming range is broader, and the minimum power consumption of lamp is decreased substantially.
    Type: Application
    Filed: March 8, 2002
    Publication date: October 24, 2002
    Inventors: Yu-Shih Liao, Tsung-Ta Chen, Wen-Hung Huang