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A Highly Power-Efficient LED Backlight Driving System for LCD TVs

Title
A Highly Power-Efficient LED Backlight Driving System for LCD TVs
Author
권오경
Keywords
Light emitting diodes; Voltage control; Pulse width modulation; Integrated circuits; Algorithm design and analysis; Current control; Educational institutions
Issue Date
2012-05
Publisher
IEEE; 1999
Citation
IEEE transactions on consumer electronics, 2012, 58(2), P.264-268
Abstract
A highly power-efficient light-emitting diode (LED) backlight driving system for liquid crystal display televisions (LCD TVs) to optimize the output voltage of boost converter is proposed. To optimize the output voltage, the forward voltage of each LED channel is analyzed and the turn-on sequence of LED channels is rearranged according to the forward voltages of LED channels. As a result, the output voltage tracks the required output voltage to drive target current in each LED channel. Experimental results show that the improvement of power efficiency is 3.8% in the proposed LED backlight driving system with 1% on-duty ratio of the pulse width modulation (PWM) signal and 5 V forward voltage variation of LED channels.
URI
https://ieeexplore.ieee.org/document/6227421/http://repository.hanyang.ac.kr/handle/20.500.11754/70086
ISSN
0098-3063
DOI
10.1109/TCE.2012.6227421
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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