Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2008-01-15
2008-01-15
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S087000, C345S089000, C345S100000, C345S213000
Reexamination Certificate
active
10640245
ABSTRACT:
A method and apparatus is described that may be capable of improving picture quality of a TFT-LCD device, to prevent occurrence of a stripe phenomenon caused by an offset, i.e., differences among the voltages output from a plurality of amplifiers in a TFT-LCD source driver circuit. The method and apparatus may eliminate differences among voltages output from a plurality of amplifiers in a circuit such as a TFT-LCD source driver circuit. In the method, a panel driving voltage may be applied to a given pixel of a liquid crystal panel in response to a clock signal. The polarity of the applied panel driving voltage may be changed in response to a polarity control signal, and a switch control signal may be generated based on the polarity control signal. The switch control signal may be applied to switch first and second input ports of each of the plurality of amplifiers.
REFERENCES:
patent: 6388653 (2002-05-01), Goto et al.
patent: 6870524 (2005-03-01), Katsutani
patent: 1019990065059 (1999-12-01), None
patent: 2002-025791 (2002-04-01), None
Korean Office Action dated Jan. 24, 2005, with English translation.
Harness Dickey & Pierce PLC
Hjerpe Richard
Samsung Electronics Co,. Ltd
Tran My-Chau T.
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