Current and white-balance controls of an RGB LED backlight power supply system

Author

Cheng, Shih-Jen ; Chiu, Huang-Jen ; Yao, Chun-Jen ; Wang, Tai-Hung ; Lo, Yu-Kang ; Mou, Shann-Chyi

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei

fYear

2008

fDate

20-22 Aug. 2008

Firstpage

233

Lastpage

236

Abstract

This paper presents an RGB LED backlight circuit for liquid crystal display (LCD) panels. Some studies have been conducted to devise dimming methods that regulate the RGB LED currents. In this paper, design considerations for the RGB LED backlight are presented. A laboratory prototype for 20-inch panels is implemented and tested. Color gamut and white-balance features of an LCD panel with the designed RGB LED backlight is measured and discussed. The experimental results of the laboratory prototype are also shown to verify feasibility of the findings.

Keywords

LED displays; computer displays; electric current control; liquid crystal displays; LED backlight power supply system; color gamut; current control; dimming method; light emitting diodes; liquid crystal display; size 20 inch; white-balance control; Circuits; Control systems; Laboratories; Light emitting diodes; Liquid crystal displays; Personal digital assistants; Power supplies; Prototypes; Shape; TV; Color Gamut; Dimming Method; Liquid Crystal Display; RGB LED Backlight;

fLanguage

English

Publisher

ieee

Conference_Titel

SICE Annual Conference, 2008

Conference_Location

Tokyo

Print_ISBN

978-4-907764-30-2

Electronic_ISBN

978-4-907764-29-6

Type

conf

DOI

10.1109/SICE.2008.4654657

Filename

4654657