Patents by Inventor Houng Kuo Hsu

Houng Kuo Hsu 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).

  • Backlight circuit for LCD panel
    Patent number: 7777425
    Abstract: A multi-lamp backlight system is disclosed. The multi-lamp backlight system includes a plurality of lamps, an inverter circuit and a current balance circuit. The inverter circuit is capable of converting a DC input signal to a pair of AC output signals, which have a 180 degree phase shift. The pair of AC output signals are delivered to the plurality of lamps. The current balance circuit is connected to the low voltage sides of the plurality of lamps for balancing the lamp currents.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: August 17, 2010
    Assignee: O2Micro International Limited
    Inventors: Houng-Kuo Hsu, Chu-Chang Chen, Ching-Chuan Kuo
  • Lamp current balancing topologies
    Patent number: 7719211
    Abstract: A method according to one embodiment may include generating AC voltage and current and a striking voltage. The method of this embodiment may also include generating striking voltage and steady-state voltage for at least two lamp loads. The method of this embodiment may also include coupling at least two lamp loads in parallel. The method of this embodiment may also include coupling current balancing circuitry to the at least two lamp loads and providing, by the current balancing circuitry simultaneous striking voltage to the at least two lamps loads. The method of this embodiment may also include balancing, by the current balancing circuitry, AC current through the at least two lamp loads. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: May 18, 2010
    Assignee: O2Micro International Limited
    Inventors: Ching Chuan Kuo, Houng Kuo Hsu
  • Lamp Current Balancing Topologies
    Publication number: 20080211426
    Abstract: A method according to on embodiment may include generating AC voltage and current and a striking voltage. The method of this embodiment may also include generating striking voltage and steady-state voltage for at least two lamp loads. The method of this embodiment may also include coupling at least two lamp loads in parallel. The method of this embodiment may also include coupling current balancing circuitry to the at least two lamp loads and providing, by the current balancing circuitry simultaneous striking voltage to the at least two lamps loads. The method of this embodiment may also include balancing, by the current balancing circuitry, AC current through the at least two lamp loads. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.
    Type: Application
    Filed: May 13, 2008
    Publication date: September 4, 2008
    Applicant: O2MICRO INTERNATIONAL LIMITED
    Inventors: Ching Chuan Kuo, Houng Kuo Hsu
  • Lamp current balancing topologies
    Patent number: 7372213
    Abstract: A method according to on embodiment may include generating AC voltage and current and a striking voltage. The method of this embodiment may also include generating striking voltage and steady-state voltage for at least two lamp loads. The method of this embodiment may also include coupling at least two lamp loads in parallel. The method of this embodiment may also include coupling current balancing circuitry to the at least two lamp loads and providing, by the current balancing circuitry simultaneous striking voltage to the at least two lamps loads. The method of this embodiment may also include balancing, by the current balancing circuitry, AC current through the at least two lamp loads. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.
    Type: Grant
    Filed: October 19, 2005
    Date of Patent: May 13, 2008
    Assignee: O2Micro International Limited
    Inventors: Ching Chuan Kuo, Houng Kuo Hsu
  • Backlight circuit for LCD panel
    Publication number: 20080067951
    Abstract: A multi-lamp backlight system is disclosed. The multi-lamp backlight system includes a plurality of lamps, an inverter circuit and a current balance circuit. The inverter circuit is capable of converting a DC input signal to a pair of AC output signals, which have a 180 degree phase shift. The pair of AC output signals are delivered to the plurality of lamps. The current balance circuit is connected to the low voltage sides of the plurality of lamps for balancing the lamp currents.
    Type: Application
    Filed: May 30, 2007
    Publication date: March 20, 2008
    Inventors: Houng-Kuo Hsu, Chu-Chang Chen, Ching-Chuan Kuo