Method for eliminating deficient image on liquid crystal...

Details Method for eliminating deficient image on liquid crystal... Method for eliminating deficient image on liquid crystal...

2005-12-12

2009-12-29

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S088000, C345S211000

Reexamination Certificate

active

07639225

ABSTRACT:
A method for eliminating deficient image on a liquid crystal display (LCD) is provided. The method is used for eliminating the deficient image generated during the shutdown period in a normally white LCD. The method comprises the following steps. First, when a power indication signal changes from a first state to a second state, a black frame is displayed in a first period of time. At the end of the first period, a white frame is displayed in a second period of time. At the end of the second period, the supply of a negative scan voltage is stopped and a white frame is displayed in a third period of time. At the end of the third period, the power is turned off.

REFERENCES:
patent: 6621489 (2003-09-01), Yanagisawa et al.
patent: 2006/0044240 (2006-03-01), Takizawa et al.

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