论文信息 - Digital dimming control of CCFL drive system using pulse density modulation technique

Digital dimming control of CCFL drive system using pulse density modulation technique

In this paper, a digital dimming controller for the CCFL drive system is presented. The proposed digital controller utilizes pulse density modulation (PDM) technique to adjust the output power. In order to verify the correctness of the proposed method, a FPGA (Field Programmable Gate Array)-based CCFL drive system is also built and tested. The overall system power efficiency is approximately 85%. Comparing to low frequency dimming (LFD) methods, the proposed system can reduce the voltage spike by over 15%.

Yi-Hwa Liu | Shun-Chung Wang | Yi-Feng Luo

[1] Hirofumi Akagi,et al. Pulse-density-modulated power control of a 4 kW, 450 kHz voltage-source inverter for induction melting applications , 1996 .

[2] Ching-Tsai Pan,et al. Design and analysis of an SLPT-based CCFL driver , 2003, IEEE Trans. Ind. Electron..

[3] C. S. Moo,et al. Electronic ballast with piezoelectric transformer for cold cathode fluorescent lamps , 2003 .

[4] Mutsuo Nakaoka,et al. A novel pulse-density-modulated high-frequency inverter for silent-discharge-type ozonizer , 2002 .

[5] Cherl-Jin Kim,et al. A Study on the design and performance of electronic ballast for CCFL dimming control with frequency modulation , 2003, Sixth International Conference on Electrical Machines and Systems, 2003. ICEMS 2003..

[6] L. Brush,et al. CCFL inverters: opportunity or threat , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[7] Sang Kyung Kim,et al. A Low-Cost High-Efficiency CCFL Inverter With New Capacitive Sensing and Control , 2006, IEEE Transactions on Power Electronics.

[8] Y. Liu,et al. PDM and PFM hybrid control of a series-resonant inverter for corona surface treatment , 2005 .

[9] Chang-Hua Lin. The design and implementation of a new digital dimming controller for the backlight resonant inverter , 2005, IEEE Transactions on Power Electronics.