Back-light control circuit of multi-lamps liquid crystal...

Details Back-light control circuit of multi-lamps liquid crystal... Back-light control circuit of multi-lamps liquid crystal...

2011-03-01

2011-03-01

Nguyen, Kevin M (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S087000, C345S211000, C345S212000, C345S213000, C345S100000, C345S061000, C345S088000, C345S089000, C345S098000, C315S2090SC, C315S291000, C315S100000

Reissue Patent

active

RE042182

ABSTRACT:
A multi-lamps LCD back-light control circuit comprises a control unit, an full bridge switch, a resonance network circuit, a voltage transformer, a lamp, and a feedback network. A constant operating frequency and a pulse width modulation (PWM) feedback are used to control the CCFL current. The back-light control circuit is such that a power switch of the full bridge switch outputs a duty cycle that is controlled and changed via a PWM controller of the control unit, while a ground switch of the full bridge switch outputs a constant duty cycle controllable above 50%.

REFERENCES:
patent: 6088249 (2000-07-01), Adamson
patent: 6385067 (2002-05-01), Galbiati et al.
patent: 6396722 (2002-05-01), Lin
patent: 7084583 (2006-08-01), Hur et al.
patent: 2002/0003525 (2002-01-01), Hwang

Affiliated with

Also associated with

Rating

Back-light control circuit of multi-lamps liquid crystal... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Back-light control circuit of multi-lamps liquid crystal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Back-light control circuit of multi-lamps liquid crystal... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2744262