Common voltage regulating circuit of liquid crystal display...

Details Common voltage regulating circuit of liquid crystal display... Common voltage regulating circuit of liquid crystal display...

2006-11-21

2006-11-21

Awad, Amr A. (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

Controlling the condition of display elements

Reexamination Certificate

active

07138996

ABSTRACT:
Disclosed is a common voltage regulating circuit of a liquid crystal display device which can be adjusted by software, comprising: a pulse signal generating means for outputting a pulse width modulation signal in response to up/down signal for adjusting a common voltage; a smoothing means for smoothing a pulse width modulation signal to a direct current level provided from the pulse signal generating means; and an amplifying means for amplifying the signal smoothed by the smoothing means to a predetermined level and then outputting a common voltage signal Accordingly, since a common voltage can be adjusted by software, by means of a surplus pulse width modulation signal generated in an integrated board without installing a separate hardware, the common voltage can be easily adjusted. Further, since a variable resistor has not been used, not only manufacturing cost but also possibility of breakage can be reduced.

REFERENCES:
patent: 5534889 (1996-07-01), Reents et al.
patent: 5561442 (1996-10-01), Okada et al.
patent: 5940055 (1999-08-01), Lee
patent: 6236384 (2001-05-01), Didier et al.
patent: 6346903 (2002-02-01), Messager
patent: 6388967 (2002-05-01), Furukawa et al.
patent: 2002/0097206 (2002-07-01), Willis

Affiliated with

Also associated with

Rating

Common voltage regulating circuit of liquid crystal display... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Common voltage regulating circuit of liquid crystal display..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Common voltage regulating circuit of liquid crystal display... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3691998