The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 20, 2004
Filed:
Dec. 30, 2002
Jung Kook Park, Kyoungki-do, KR;
Yeong Koo Kim, Seoul, KR;
Boe-Hydis Technology Co., Ltd., Kyoungki-do, KR;
Abstract
Disclosed is a backlight system and a method for driving backlight capable of reducing noises and voltage fluctuations in power voltage due to a turn-on/turn-off of the lamp. The backlight system includes two lamps, a power supply unit for supplying alternating voltage or alternating current supplies power for driving the lamps to each lamp with a predetermined time lag or phase difference. With this feature of the present invention, the magnitude of noise and voltage fluctuations occurring in the power voltages supplied to the power supply unit may be significantly reduced. Thus, deterioration of display quality, flicker, etc., due to noise and voltage fluctuation can be prevented. Also, there is provided a backlight system which may produce a lamp driving signal with a constant frequency obtained by multiplying a frequency of vertical synchronization signal by an integer. With this feature of the present invention, a horizontal wave or a flicker can be easily eliminated by producing the lamp driving signal synchronized with the vertical synchronization signal and operation of the lamp can be stabilized as well because the lamp is driven by the lamp driving power with a constant frequency.