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 |