Patents by Inventor Gyoung S. Choo

Gyoung S. Choo 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).

  • Apparatus and method for extending pulling range of automatic fine tuning of television receiver
    Patent number: 5444498
    Abstract: An apparatus and a method for extending a pulling range of automatic fine tuning of a television receiver. An initial tuning voltage is applied to a tuner when a channel switching operation is performed or the television receiver is powered on. The tuning voltage to the tuner is controlled by bands as a result of comparison of an automatic fine tuning voltage of a specified channel with a first predetermined reference voltage. If the automatic fine tuning voltage is higher than the first predetermined reference voltage, it is checked whether the automatic fine tuning voltage is within a desired range. The tuning voltage to the tuner is controlled by the bands if the automatic fine tuning voltage is not within the desired range, to maintain the automatic fine tuning voltage within the desired range. Presence of a synchronous signal of the specified channel is checked if the automatic fine tuning voltage is within the desired range.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: August 22, 1995
    Assignee: Goldstar Co., Ltd.
    Inventors: Gyoung S. Choo, Deuk C. Kang