Design of Programmable LED Controller with a Variable Current Source for 3D Image Display

Information

Kyung-Ryang Lee²  Sung-Dae Yeo²  Seung-Il Cho⁴  Seong-Kweon Kim¹  Jason C. Hung³  Shu-Ching Chen³ 

[1] Department of Electronic and IT Media Engineering, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul, Korea;Graduate School of NID Fusion Technology, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul, Korea; E-Mails:Graduate School of NID Fusion Technology, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul, Korea;;Innovation Center for Organic Electronics, Yamagata University, 1-808-48 Arcadia, Yonezawa, Yamagata 992-0119, Japan; E-Mail:

关键词: light emitting diode (LED);    adiabatic;    constant current;    low power;   

DOI  :  10.3390/info5040652

来源: mdpi

【 摘 要 】

Conventional fluorescent light sources, as well as incandescent light sources are gradually being replaced by Light Emitting Diodes (LEDs) for reducing power consumption in the image display area for multimedia application. An LED light source requires a controller with a low-power operation. In this paper, a low-power technique using adiabatic operation is applied for the implementation of LED controller with a stable constant-current, a low-power and low-heat function. From the simulation result, the power consumption of the proposed LED controller using adiabatic operation was reduced to about 87% in comparison with conventional operation with a constant V_DD. The proposed circuit is expected to be an alternative LED controller which is sensitive to external conditions such as heat.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.