| Title |
Zero-Transient Current Control Method for PWM Dimming of LED |
| Authors |
Young-Nam Yoon ; 李Sang-Hyun Lee ; Sang-Ho Cho ; Sung-Soo Hong ; Chang-Sub Kim ; 李Hyo-Bum Lee ; Sang-Kyoo Han |
| DOI |
10.6113/TKPE/2011.16.1.64 |
| Keywords |
LED current control; zero-transient; PWM dimming |
| Abstract |
This paper presents a zero-transient current control method for PWM dimming of LED. Since the proposed LED current control method has no transient state, it features a high resolution, high linearity, and no current overshoot through LED along a wide dimming range. The operational principles of the proposed LED current control circuit are presented. To confirm the validity of the proposed method experimental results from a prototype circuit of the 46-inch LCD TV are given. |