Computer graphics processing and selective visual display system – Display driving control circuitry
Reexamination Certificate
2006-07-25
2006-07-25
Eisen, Alexander (Department: 2674)
Computer graphics processing and selective visual display system
Display driving control circuitry
C345S100000, C377S064000
Reexamination Certificate
active
07081890
ABSTRACT:
A bi-directional driving circuit of a flat panel display device and method for driving the same is disclosed in the present invention. The bi-directional driving circuit of a flat panel display device having a plurality of blocks driven by a start pulse Vst, first to fourth clock signals having different phases CLK1, CLK2, CLK3, and CLK4, and first and second power source voltages Vdd and Vss, each block includes a shift register comprising a first control part charging the start pulse Vst or an output signal of a previous block to a first node Q according to either one of the first to fourth clock signals or a second node QB, a second control part controlling the second node QB according to the start pulse Vst, either the output signal of the previous block or an output signal of the next block, and one of the first to fourth clock signals, a third control part charging the start pulse Vst or the output signal of the next block to the first node Q according to either one of the first to fourth clock signals, or controlling the second node QB, and a buffer outputting one of the first to fourth clock signals as a shift pulse according to the first and second nodes Q and QB; and a level shifter shifting a level of the shift pulse output from the shift register in each block, and outputting the shifted level.
REFERENCES:
patent: 6483889 (2002-11-01), Kim et al.
Oh Du Hwan
Park Jae Deok
Dinh Duc
Eisen Alexander
LG.Philips LCD Co. , Ltd.
McKenna Long & Aldridge LLP
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