대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2002년도 하계학술대회 논문집 D
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- Pages.2568-2571
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- 2002
액정디스플레이 후광 인버터 구동 IC
LCD Backlight Inverter Drive IC
- Jeong, Dong-Youl (Interpion Semiconductor Co. Ltd.) ;
- Jang, Cheon-Seob (Interpion Semiconductor Co. Ltd.) ;
- Lee, Seung-Zoo (Interpion Semiconductor Co. Ltd.)
- 발행 : 2002.07.10
초록
A LCD backlight inverter control IC based on the piezoelectric transformer (PZT) for Cold Cathode Fluorescent Lamp (CCFL) lighting is proposed. It is indeed a variable frequency, variable duty (VFVD) controller having dual feedback control loops for achieving both the regulation of lamp current and the maximum efficiency. The PWM controller regulates the lamp current, while the PLL controller tunes the operating frequency to the frequency that the efficiency of the combined LC-PZT resonator becomes maximum. The mixed PLL/PWM control technique lets the backlight inverter operate at the maximum efficiency in spite of the variation of component and environment. The controller features include a protection for an open or broken lamps, and an open lamp regulation.
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