Low current voltage supply circuit for an LCD driver

Details Low current voltage supply circuit for an LCD driver Low current voltage supply circuit for an LCD driver

1998-02-10

2000-09-12

Wu, Xiao

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

345 52, G09G 500

Patent

active

06118439&

ABSTRACT:
A voltage supply circuit for an LCD driver employs two voltage dividers. A low current voltage divider includes resistive elements having a high resistance, thus providing a bias voltage with a low current. A high current voltage divider includes resistive elements having low resistances, thus providing a bias voltage with a high current. The high current voltage divider provides bias voltage levels with high current at the beginning of each time phase change. Thus, the liquid crystal display receives a high current when updating the bias voltage levels on the LCD, thereby producing a fast settling time. When the bias voltage levels are held constant, however, only the low current voltage divider provides the bias voltage levels to reduce power consumption. A halt mode prevents the liquid crystal display and driver from consuming any power by disconnecting both voltage dividers from the voltage source when in sleep mode. A voltage drop mode produces a reduction in the bias voltage levels by placing another voltage drop in series with the voltage dividers.

REFERENCES:
patent: 5521611 (1996-05-01), Okada et al.
patent: 5574475 (1996-11-01), Callahan, Jr. et al.
patent: 5627457 (1997-05-01), Ishiyama et al.
patent: 5847702 (1998-12-01), Jung

Affiliated with

Also associated with

Rating

Low current voltage supply circuit for an LCD driver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low current voltage supply circuit for an LCD driver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low current voltage supply circuit for an LCD driver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-100035