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Information 2014, 5(4), 652-660; doi:10.3390/info5040652

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

1
Graduate School of NID Fusion Technology, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul, Korea
2
Innovation Center for Organic Electronics, Yamagata University, 1-808-48 Arcadia, Yonezawa, Yamagata 992-0119, Japan
3
Department of Electronic and IT Media Engineering, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul, Korea
*
Author to whom correspondence should be addressed.
Received: 14 August 2014 / Revised: 13 October 2014 / Accepted: 5 November 2014 / Published: 3 December 2014
(This article belongs to the Special Issue Ubiquitous Systems and Services for IT Convergence)
View Full-Text   |   Download PDF [988 KB, uploaded 3 December 2014]   |  

Abstract

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 VDD. The proposed circuit is expected to be an alternative LED controller which is sensitive to external conditions such as heat. View Full-Text
Keywords: light emitting diode (LED); adiabatic; constant current; low power light emitting diode (LED); adiabatic; constant current; low power
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lee, K.-R.; Yeo, S.-D.; Cho, S.-I.; Kim, S.-K. Design of Programmable LED Controller with a Variable Current Source for 3D Image Display. Information 2014, 5, 652-660.

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