Driving circuit for liquid crystal display

Details Driving circuit for liquid crystal display Driving circuit for liquid crystal display

2006-10-17

2006-10-17

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S211000, C345S087000

Reexamination Certificate

active

07123231

ABSTRACT:
A discharge accelerating unit which accelerates a discharge of a capacitive load (floating capacitor C1) of a signal line when a positive polarity input gradation voltage DAC(P) decreases is provided for a positive polarity operating circuit. A charge accelerating unit which accelerates a charge of a capacitive load (floating capacitor C2) of a signal line when a negative polarity input gradation voltage DAC(N) decreases is provided for a negative polarity operating circuit. Good characteristics can be obtained irrespective of a switching period of the positive polarity operating circuit and the negative polarity operating circuit and luminance levels of adjacent dots. The number of devices which are added by the invention can be minimized.

REFERENCES:
patent: 5821808 (1998-10-01), Fujima
patent: 6384817 (2002-05-01), Janssen et al.
patent: 6580258 (2003-06-01), Wilcox et al.
patent: 6985142 (2006-01-01), Svensson et al.
patent: 2003/0160749 (2003-08-01), Tsuchi
patent: 11-095729 (1999-04-01), None
patent: 2002-229525 (2002-08-01), None
patent: 2002-258821 (2002-09-01), None

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