Designing method and circuit of gray level and luminance...

Details Designing method and circuit of gray level and luminance... Designing method and circuit of gray level and luminance...

2006-04-11

2006-04-11

Shankar, Vijay (Department: 2673)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S087000, C345S095000, C345S096000, C345S209000, C345S210000, C345S690000

Reexamination Certificate

active

07027020

ABSTRACT:
A designing method and circuit of gray level and luminance characteristic of liquid crystal display are disclosed. A LCD is used to actually measure data about gray level and luminance of the liquid crystal display for building a gray level and luminance database of the liquid crystal display. The characteristic of gray level and luminance at other voltages is calculated to estimate a relation between gray level and luminance using a different driving circuit chip, thereby adjusting internal resistance of the driving circuit chip of the liquid crystal display to have optimal relation between gray level and luminance, and adjusting black signal high voltage, white signal high voltage, white signal low voltage and black signal low voltage to match the display data and generate outputs of a high voltage and a low voltage of each gray level.

REFERENCES:
patent: 6008786 (1999-12-01), Kimura et al.
patent: 6611249 (2003-08-01), Evanicky et al.
patent: 2004/0036708 (2004-02-01), Evanicky et al.

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