Patents by Inventor Khoua Vang

Khoua Vang 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).

  • Reducing scrolling effect for LCD lamps
    Patent number: 8736541
    Abstract: A liquid crystal display (LCD) device's microcontroller is used drive an LCD lamp ballast such that the scrolling effect from its light leakage may be reduced to a visually imperceptible level. A check may be performed of lamp's control status in order to verify the microcontroller's ability to properly and accurately control the lamp ballast. The microcontroller may then determine a frequency and duty cycle to use for the microcontroller's PWM control signal. Thereafter, the microcontroller may generate the PWM control signal in accordance with the determined frequency and duty cycle, and drive the lamp ballast using the control signal.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: May 27, 2014
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Vincent Du, Marcelo Goto, Khoua Vang, Yoshiaki Shimizu
  • Reducing Scrolling Effect for LCD Lamps
    Publication number: 20090213098
    Abstract: A liquid crystal display (LCD) device's microcontroller is used drive an LCD lamp ballast such that the scrolling effect from its light leakage may be reduced to a visually imperceptible level. A check may be performed of lamp's control status in order to verify the microcontroller's ability to properly and accurately control the lamp ballast. The microcontroller may then determine a frequency and duty cycle to use for the microcontroller's PWM control signal. Thereafter, the microcontroller may generate the PWM control signal in accordance with the determined frequency and duty cycle, and drive the lamp ballast using the control signal.
    Type: Application
    Filed: February 26, 2008
    Publication date: August 27, 2009
    Applicants: SONY CORPORATION, SONY ELECTRONICS INC.
    Inventors: Vincent Du, Marcelo Goto, Khoua Vang, Yoshiaki Shimizu
  • System and method for dynamically establishing microdisplay driver offsets using brightness value in rear projection TV having dynamic iris control
    Publication number: 20080231754
    Abstract: In a rear projection microdisplay TV with dynamic iris control, sensed average picture level (APL) or other sensed brightness level is used to dynamically establish microdisplay driver offsets including white balance.
    Type: Application
    Filed: March 22, 2007
    Publication date: September 25, 2008
    Inventors: Orlando Arreola, Vincent V. Du, Eiji Kono, Tuan pham, Yoshiaki Shimizu, Khoua Vang, Jesus Villalpando