Circuit arrangement for the voltage supply of a liquid...

Details Circuit arrangement for the voltage supply of a liquid... Circuit arrangement for the voltage supply of a liquid...

2006-05-02

2006-05-02

Chang, Kent (Department: 2675)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S690000

Reexamination Certificate

active

07038646

ABSTRACT:
The circuit arrangement serves for the voltage supply of the row and column drivers of a liquid crystal display device. It comprises a voltage divider (1) having a plurality of series-connected resistors (R1–R5) and having voltage pick-offs (22–25) arranged between the resistors (R1–R5) for picking off different voltage levels (V2–V5). A single one (25) of the voltage pick-offs (22–25) is provided with means (3) for fine-tuning of the voltage level (V5) picked off there. By individually calibrating each individual circuit arrangement once, the one voltage level (V5) may be fine-tuned such that crosstalk caused by asymmetrical voltage levels, i.e. mutual interaction of pixel contents, is reduced. The advantages of the circuit arrangement come into their own in particular when it is used in liquid crystal display devices with a gray-stage display or color display.

REFERENCES:
patent: 3993991 (1976-11-01), Lorteije et al.
patent: 5250937 (1993-10-01), Kikuo et al.
patent: 5751278 (1998-05-01), Inamori et al.
patent: 5828354 (1998-10-01), Ebihara
patent: 6275209 (2001-08-01), Yamamoto
patent: 6677923 (2004-01-01), Kajihara et al.

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