Method and apparatus for driving liquid crystal display

Details Method and apparatus for driving liquid crystal display Method and apparatus for driving liquid crystal display

2004-06-28

2008-10-28

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S088000

Reexamination Certificate

active

07443377

ABSTRACT:
A driving method and apparatus for a liquid crystal display is disclosed in which the contrast ratio of data to be displayed is expanded and brightness of a back light is selectively changed in correspondence with the data. Whether the data is that of an initial color field is determined. The data is converted into brightness components and arranged into a histogram for each frame. Data having an expanded contrast is generated by the histogram. A control value is extracted from the histogram. The brightness of the back light is generated in correspondence with the control value if an initial color field is not displayed. However, if an initial color field is displayed, a predetermined brightness is supplied irrespective of the extracted control value.

REFERENCES:
patent: 6762742 (2004-07-01), Moon et al.
patent: 6795053 (2004-09-01), Funamoto et al.

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