Power-on screen pattern correcting apparatus and source...

Details Power-on screen pattern correcting apparatus and source... Power-on screen pattern correcting apparatus and source...

2011-08-23

2011-08-23

Lao, Lun-Yi (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

C713S300000, C713S340000

Reexamination Certificate

active

08004512

ABSTRACT:
A power-on screen pattern correcting apparatus is for correcting start output data of output terminals of a source driver such that a power-on screen pattern of a display is substantially uniform. The correcting apparatus comprises a flip-flop, a first logic unit and a second logic unit. The flip-flop controls a level of an inner signal to be substantially equal to a low signal level in response to a low level of a power start signal. The first logic unit enables a first signal in response to the low level of the inner signal or a low level of a high-impedance control signal. The second logic unit enables a second signal such that the output terminals are coupled to a charge sharing line and the power-on screen pattern is uniform in response to the low level of the inner signal or a low level of a charge-sharing control signal.

REFERENCES:
patent: 5736873 (1998-04-01), Hwang
patent: 2001/0022582 (2001-09-01), Arai et al.
patent: 2004/0252116 (2004-12-01), Tobita
patent: 2005/0108584 (2005-05-01), Kawakami et al.

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