An continuous-time LED dimming technique

IEICE Electronics Express

Bing Shiun Hsieh¹  Ying Xu Tsai²  Chun Wei Lin² 

[1]Graduate School of Engineering Science and Technology, National Yunlin University of Science & Technology

[2]Department of Electronic Engineering, National Yunlin University of Science & Technology

关键词: LED;    dimming;    PWM;    multilevel;   

DOI  :  10.1587/elex.10.20130070

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(6)This paper presents a dimming technique for light emitting diode (LED), which improves the resolution of luminous intensity, luminous efficiency and extends the life of device. The presented method quantifies corresponding variation from light sensor into binary representation by a pulse width modulator (PWM) and multilevel generator. After that, a digital filter is further used to perform interpolation on converted binary codes enhancing the length of signal. Through controlling the binary-weighted current regulation, the presented method provides 8-bit resolution on adjusting luminous intensity.

【 授权许可】

Unknown