Computer graphics processing and selective visual display system – Display driving control circuitry
Reexamination Certificate
2005-12-22
2010-06-29
Shalwala, Bipin (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
C345S087000, C345S102000, C345S211000, C345S213000
Reexamination Certificate
active
07746330
ABSTRACT:
A circuit and method of reducing noises for improving quality of display in a liquid crystal display (LCD) system. The LCD system includes an LCD panel and at least one lamp. In operation the LCD system is supplied with a vertical synchronization signal and a horizontal synchronization signal. In one embodiment, the method comprises the steps of determining a lamp driving frequency for the at least one lamp responsive to the horizontal synchronization signal, and generating a lamp driving signal with the lamp driving frequency to be received by the at least one lamp for producing light, wherein the following formulae (1) and (2) are satisfied:flamp=2n-1mHsync+δ(1)andHsync/m≥δ≥0(2)where Hsyncis the frequency of the horizontal synchronization signal in unit of (Hz); flampis the lamp driving frequency for the lamp driving signal in unit of (Hz); m, n=1, 2, 3, . . . , an integer; and δ indicates the permissible error of the lamp driving frequency.
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Shih Hung-Min
Yu Chia-Wei
Au Optronics Corporation
Kovalick Vince E
Morris Manning & Martin LLP
Shalwala Bipin
Tingkang Xia Tim
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