Design and Implementation of RGB LED Drivers for LCD Backlight Modules
Authors:
- Yu-Kang LoYLYu-Kang Lo
- Kuan-Hung WuKWKuan-Hung Wu
- Kai-Jun PaiKPKai-Jun Pai
- Huang-Jen ChiuHCHuang-Jen Chiu
- 17 July 2009
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industrial Electronics
- Vol. 56 (12) , 4862-4871
Abstract
In this paper, a backlight module driver driving high-power red, green, and blue light-emitting diodes (RGB LEDs) for a 19-in liquid crystal display is proposed. The DC-DC series resonant converters (SRCs) with zero-voltage switching and constant-output-current control are implemented to drive the RGB LED arrays. Phase-shifted pulsewidth modulation dimming control is adopted to effectively narrow the load variations and improve the output voltage regulations of the SRCs. A DSP-based hysteresis control algorithm is performed to track the white-color point and the specified backlight luminance. Analysis and design considerations of the proposed drivers are presented in detail. Experimental results agree well with the theoretical predictions and confirm the validity of the proposed approach.Keywords
This publication has 16 references indexed in Scilit:
- Multistring LED Backlight Driving System for LCD Panels With Color Sequential Display and Area ControlIEEE Transactions on Industrial Electronics, 2008
- LED Backlight Driving System for Large-Scale LCD PanelsIEEE Transactions on Industrial Electronics, 2007
- Feedback Design of a Piezoelectric Transformer-Based Half-Bridge Resonant CCFL InverterIEEE Transactions on Industrial Electronics, 2007
- Analysis of Current Distribution in Driving Multiple Cold Cathode Fluorescent Lamps (CCFL)IEEE Transactions on Industrial Electronics, 2007
- Optimum Trajectory Switching Control for Series-Parallel Resonant ConverterIEEE Transactions on Industrial Electronics, 2006
- Process development for yellow phosphor coating on blue light emitting diodes (LEDs) for white light illumination2006
- Resonant tank and transformer design in series resonant converter2005
- Control of a series resonant converter by pulse density modulation2005
- Efficient white LED lighting and its application to medical fieldsPhysica Status Solidi (a), 2004
- Implementation of a neural controller for the series resonant converterIEEE Transactions on Industrial Electronics, 2002