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http://dx.doi.org/10.5762/KAIS.2010.11.2.461

Simple Digital LCD Backlight Inverter using a Single-chip Microcontroller  

Jeong, Gang-Youl (Department of Electronic Information Engineering, Soonchunhyang University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.11, no.2, 2010 , pp. 461-468 More about this Journal
Abstract
This paper presents a simple digital LCD backlight inverter using a single-chip microcontroller. The proposed inverter reduces the ignition voltage and eliminates the current spikes and hence improves the ignition behavior of the cold cathode fluorescent lamp(CCFL). Thus it increases the CCFL's life span. This is achieved by implementing a digital dimming control algorithm, that contains the soft-starting algorithm, all on a single-chip microcontroller. The inverter utilizes the full-bridge resonant circuit topology. The design example along with a simple analysis for the inverter is shown, and the experimental results of the designed prototype results in close agreement with the theoretical analysis and explanation. The overall system's power efficiency is approximately 85%. Compared with conventional inverters, the ignition voltage is reduced by around 30% without any lamp current spike occurring during the dimming control operation.
Keywords
LCD; CCFL; Backlight Inverter; Digital Dimming Control; Soft-starting; Resonant Inverter;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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