標題: RGB LED Backlight of Color Sequential Display with Precise Current-Balance Control Technique
作者: Chiu, Chia-Lin
Lee, Yu-Huei
Hsieh, Chun-Yu
Ho, Ming-Tsung
Chen, Ke-Horng
Li, Ling
Chen, Chih-Chung
電控工程研究所
Institute of Electrical and Control Engineering
關鍵字: Field sequential color;precise current balance;Minimum voltage detection
公開日期: 2009
摘要: This paper proposes a high efficiency and precise current balance circuit in parallel RGB Light Emitting Diodes (LED) channels for color filter-less panel display. The new technique not only enhances the current matching in each channel but also reduces the requirement of device numbers and external resistors. The error percentage of all channel LED currents can kept within 0.1% when the channel voltage has a voltage variation ((Delta) V(CH)) around 1.IV. Furthermore, the proposed load dependent minimum drain voltage can effectively reduce the voltage drop across the precise current balance circuit. As a result, the efficiency of the LED driver can be improved.
URI: http://hdl.handle.net/11536/28465
期刊: 2009 SID INTERNATIONAL SYMPOSIUM DIGEST OF TECHNICAL PAPERS, VOL XL, BOOKS I - III
起始頁: 644
結束頁: 648
顯示於類別:會議論文