Browse > Article

New High Performance and Low Cost Construction of Unified Power System for LCD TV Backlight Driver Circuitb  

Jang, Doo-Hee (국민대 전자공학과)
Lee, Jae-Kwang (삼성전기(주) P&M 사업부)
Roh, Chung-Wook (국민대 전자정보통신공학부)
Hong, Sung-Soo (국민대 전자정보통신공학부)
Kim, Jin-Wook (삼성전기(주) P&M 사업부)
Lee, Hyo-Bum (삼성전기(주) P&M 사업부)
Han, Sang-Kyoo (국민대 전자정보통신공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.14, no.1, 2009 , pp. 23-30 More about this Journal
Abstract
A new high performance and low cost unified power system is proposed through investigating conventional Power-Integrated Drive(PID) system and Power-Separated Drive(PSD) system applied to LCD TV. Since the proposed system consists of two stage, namely power and inverter stage it features high efficiency and cost effectiveness. To satisfy the safety standard of the High voltage transformer, 1:1 transformer is employed between inverter and high voltage transformer. Moreover, to ensure the Zero Voltage Switching(ZVS) of all power switches and the Pulse Count Modulation(PCM) method is employed, which controls the number of pulse at the fixed frequency and fixed duty cycle. Therefore, it features high efficiency, improved heat generation, cost effectiveness and good EMI performance including no additional current balancing coil. To confirm the validity of proposed system, comparison of conventional system, verification of experimental results are presented.
Keywords
Power Conversion System; LCD Backlight; PCM; Inverter;
Citations & Related Records
연도 인용수 순위
  • Reference
1 이재광, 한상규, 노정욱, 홍성수, 사공석진, 김진욱, 이효범 '32인치 LCD Backlight의 휘도 제어를 위한 새로운 PCM 방식 인버터', 전력전자학회논문지, pp. 372-374, 2007. 7
2 Ye, Z., Jain, P., Sen, P.C., 'A Full Bridge Resonant Inverter with Modified Phase Shift Modulation', Power Electrinics Specialists Conference, pp 642-649, 2005
3 Abraham I. Pressman, 'Switching Power Supply Design', McGraw Hill, pp.563-609, 1998
4 Yu-Kang Lo, Kai-Jun Pai, Shang-Chin Yen, 'A High-Voltage Input Backlight Module Driver for Multi-Lamp LCD Panels', Power Electronics and Drives Systems, 2005. International Conference, Vol. 1, pp. 663-665, 16-18 Jan. 2006
5 이광일, '인버터 응용을 위한 새로운 트랜스포머 구조', 국민대학교 석사학위 논문