Apparatus for driving liquid crystal display device and...

Details Apparatus for driving liquid crystal display device and... Apparatus for driving liquid crystal display device and...

2005-12-22

2009-02-03

Tran, Douglas Q (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C345S600000

Reexamination Certificate

active

07486417

ABSTRACT:
An apparatus for driving a liquid crystal display, which is capable of controlling image brightness according to an Average Picture Level (APL) in a red-green-blue-white (RGBW) type display, and a driving method using the same is disclosed. The apparatus for driving a liquid crystal display device includes: a liquid crystal panel including 4-color sub-pixels; a data driver for providing video data signals to each sub-pixel; a gate driver for providing a scan pulse to each sub-pixel A data converter determines an Average Picture Level (APL) of 3-color source data, and generates a gain value corresponding to the average picture level. The 3-color source data is converted into 4-color data using the generated gain value; and a timing controller for communicates the 4-color data received through the data converter to the data driver.

REFERENCES:
patent: 7227543 (2007-06-01), Aoki et al.
patent: 7265795 (2007-09-01), Ohyama et al.

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