Design and implementation of RGB LED drivers for LCD backlight modules

Yu Kang Lo; Kuan Hung Wu; Kai Jun Pai; Huang Jen Chiu

doi:10.1109/TIE.2009.2026771

Design and implementation of RGB LED drivers for LCD backlight modules

Yu Kang Lo^*, Kuan Hung Wu, Kai Jun Pai, Huang Jen Chiu

^*Corresponding author for this work

Undergraduate Program of Vehicle and Energy Engineering

Research output: Contribution to journal › Article › peer-review

105 Citations (Scopus)

Abstract

In this paper, a backlight module driver driving highpower 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 constantoutput- 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.

Original language	English
Article number	5166500
Pages (from-to)	4862-4871
Number of pages	10
Journal	IEEE Transactions on Industrial Electronics
Volume	56
Issue number	12
DOIs	https://doi.org/10.1109/TIE.2009.2026771
Publication status	Published - 2009 Dec

Keywords

And blue light-emitting diodes (RGB LEDs)
Green
Hysteresis control algorithm
Phase-shifted pulsewidth modulation (PSPWM) dimming
Red
Series resonant converter (SRC

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering

Access to Document

10.1109/TIE.2009.2026771

Cite this

@article{bfca4356207e488383e61065554c9a04,

title = "Design and implementation of RGB LED drivers for LCD backlight modules",

abstract = "In this paper, a backlight module driver driving highpower 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 constantoutput- 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 = "And blue light-emitting diodes (RGB LEDs), Green, Hysteresis control algorithm, Phase-shifted pulsewidth modulation (PSPWM) dimming, Red, Series resonant converter (SRC",

author = "Lo, {Yu Kang} and Wu, {Kuan Hung} and Pai, {Kai Jun} and Chiu, {Huang Jen}",

year = "2009",

month = dec,

doi = "10.1109/TIE.2009.2026771",

language = "English",

volume = "56",

pages = "4862--4871",

journal = "IEEE Transactions on Industrial Electronics",

issn = "0278-0046",

publisher = "IEEE Industrial Electronics Society",

number = "12",

}

TY - JOUR

T1 - Design and implementation of RGB LED drivers for LCD backlight modules

AU - Lo, Yu Kang

AU - Wu, Kuan Hung

AU - Pai, Kai Jun

AU - Chiu, Huang Jen

PY - 2009/12

Y1 - 2009/12

N2 - In this paper, a backlight module driver driving highpower 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 constantoutput- 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.

AB - In this paper, a backlight module driver driving highpower 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 constantoutput- 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.

KW - And blue light-emitting diodes (RGB LEDs)

KW - Green

KW - Hysteresis control algorithm

KW - Phase-shifted pulsewidth modulation (PSPWM) dimming

KW - Red

KW - Series resonant converter (SRC

UR - http://www.scopus.com/inward/record.url?scp=77955511194&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77955511194&partnerID=8YFLogxK

U2 - 10.1109/TIE.2009.2026771

DO - 10.1109/TIE.2009.2026771

M3 - Article

AN - SCOPUS:77955511194

SN - 0278-0046

VL - 56

SP - 4862

EP - 4871

JO - IEEE Transactions on Industrial Electronics

JF - IEEE Transactions on Industrial Electronics

IS - 12

M1 - 5166500

ER -

Design and implementation of RGB LED drivers for LCD backlight modules

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this