Stepless Tunable Four-Chip LED Lighting Control on a Black Body Radiation Curve Using the Generalized Reduced Gradient Method

Stepless Tunable Four-Chip LED Lighting Control on a Black Body Radiation Curve Using the Generalized Reduced Gradient Method

2016/5 Chih-Wei Lin, Ke-Fang Hsu,  Jung-Min Hwang

Abstract: 

This study proposes an algorithm for calculating the outputs of a stepless,
tunable, four-chip LED according to a black body radiation curve; the proposed algorithm
is based on the generalized reduced gradient method. The lumen outputs of the four-chip
LEDs were calculated in real time at color temperatures ranging between 2500 K and
6500 K without using a lookup table, enabling achieving high-quality lighting designs.
Finally, the algorithms for the stepless dimming method, with average color shift Duv
0.0027, is proposed. This algorithm has much smaller memory size requirements for the
microcontroller unit than the current method.

Keywords RGBA LED Black body curve Optimization

  

•  Link:

http://link.springer.com/article/10.1007%2Fs11082-016-0581-3

• International Journals (國際期刊):

Chih-Wei Lin,Ke-Fang Hsu, Jung-Min Hwang, Stepless Tunable Four-Chip LED Lighting Control on a Black Body Radiation Curve Using the Generalized Reduced Gradient Method, Optical and Quantum Electronics 48(6):1-8 · June 2016 

• download:

 https://drive.google.com/file/d/0B-Jg2ZDReoWuODJ5OThWUmN1dWs/view?usp=sharing