Computer graphics processing and selective visual display system – Display driving control circuitry
Reexamination Certificate
2006-06-29
2010-11-23
Mengistu, Amare (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
C345S090000, C345S690000, C345S698000, C348S180000, C348S658000, C348S246000, C349S054000, C349S192000
Reexamination Certificate
active
07839395
ABSTRACT:
A flat panel display device may improve picture quality by compensating a panel defect by use of a circuit and a picture quality controlling method.A flat panel display device includes a display panel. A memory stores a location information and a compensation value for a panel defect location on the display panel. A first converter calculates a brightness and color difference signals from red, green, blue video signals to be displayed in the display panel. The first converter expands the number of data bits of the brightness signal to generate the expanded brightness signal. A compensating part generates a compensated brightness signal by increasing or decreasing the expanded brightness signal of the video signal to be displayed in the panel defect location. A second converter calculates the red, green, blue signals from the color difference signal and the compensated brightness signal, and generates the compensated video signal by reducing the number of bits of the calculated red, green, blue signals. A drive circuit drives the display panel by use of the compensated video signal and the uncompensated video signal.
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Choi Young Woo
Chung In Jae
Hwang Jong Hee
Jang Chul Sang
Brinks Hofer Gilson & Lione
LG. Display Co. Ltd.
Mengistu Amare
Sharifi Koosha
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