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Proceedings Paper

A blue-violet enhanced BDJ photodetector and its application in the color measurement of RGB LEDs for solid-state lighting
Author(s): Kun Liang; Wi Li; Hongru Ren; Xuelian Liu; Wenjie Wang; Ru Yang; Dejun Han
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Paper Abstract

A blue-violet enhanced BDJ photodetector which can simultaneously determine the centroid wavelength and the radiant power of LEDs from 380 to780nm was investigated, and its application in the color measurement and the white balancing of RGB white LEDs was demonstrated. This BDJ photodetector directly gave the chromatic coordinates of a LED that was approximated as a monochromatic stimulus due to its narrow spectrum compared with the CIE colormatching functions. Maximal simulated and experimental errors Δ'u'v' to the target white point of the white balanced RGB LEDs was 0.0154 and 0.0214. The BDJ photodetector also performed to be sensitive to the spectrum variation characterized by CCT, and was preferable as a sensor for monitoring the white point.

Paper Details

Date Published: 18 November 2008
PDF: 9 pages
Proc. SPIE 7135, Optoelectronic Materials and Devices III, 71351X (18 November 2008); doi: 10.1117/12.803480
Show Author Affiliations
Kun Liang, Beijing Normal Univ. (China)
Wi Li, Beijing Normal Univ. (China)
Hongru Ren, Beijing Normal Univ. (China)
Xuelian Liu, Beijing Normal Univ. (China)
Wenjie Wang, Beijing Normal Univ. (China)
Ru Yang, Beijing Normal Univ. (China)
Dejun Han, Beijing Normal Univ. (China)

Published in SPIE Proceedings Vol. 7135:
Optoelectronic Materials and Devices III
Yi Luo; Jens Buus; Fumio Koyama; Yu-Hwa Lo, Editor(s)

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