Simplified control technique for LCD backlight inverter system using the mixed dimming method

Author

Lee, S.W. ; Ko, D.Y. ; Huh, D.Y. ; Yoo, Y.I.

Author_Institution

Fairchild Korea Semicond. IC Team, Kyonggi, South Korea

Volume

1

fYear

2001

fDate

2001

Firstpage

447

Abstract

A simple and cost effective LCD backlight inverter control technique with constant switching frequency, is developed and verified. The proposed control method including voltage mode control, feed-forward control and mixed dimming control (analog dimming+burst dimming). Very good input step response is obtained by adding input voltage feedforward to the feedback loop. This paper provides a useful mixed dimming control method, and this method broadens the dimming range. The validity of this paper is confirmed by an experimental 14.1 inch LCD backlight inverter system

Keywords

feedback; feedforward; invertors; lighting control; liquid crystal displays; step response; voltage control; 14.1 in; LCD backlight inverter system; analog dimming; burst dimming; constant switching frequency; feed-forward control; feedback loop; input step response; input voltage feedforward; mixed dimming control; mixed dimming method; voltage mode control; Capacitors; Circuit topology; Computer displays; Control systems; Costs; Feeds; Pulse width modulation inverters; Resonance; Resonant inverters; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE

Conference_Location

Anaheim, CA

Print_ISBN

0-7803-6618-2

Type

conf

DOI

10.1109/APEC.2001.911685

Filename

911685