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长春光学精密机械与物... [1]
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会议论文 [1]
发表日期
2008 [1]
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Study on chroma balance based on grating spectrometer for LED (EI CONFERENCE)
会议论文
Light-Emitting Diode Materials and Devices II, November 12, 2007 - November 14, 2007, Beijing, China
Sun W.-J.
;
Wang S.-Y.
;
Yin Y.-Z.
;
Rong X.-W.
;
Meng Z.
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提交时间:2013/03/25
A standard white light compounding algorithm based on combination of choma coordinates acquisition system with computer working current control system is presented for three-color LED. The chroma coordinates acquisition system consist of grating spectrometer and integrating sphere. The computer adjust and control the working current of three-color LED
then achieved chroma coordinates error between the compounded white light and standard white light D65
until the chroma coordinates is less than the threshold beforehand set by this technique. The compounded white light meet the chroma error demanded that is able to be changed
at the same time the chroma coordinates acquisition system and the working current control system are eliminated. The proposed algorithm the offset of central wavelength and the change of chroma coordinates due to working current variety for LEDs. Experimental results show that the proposed algorithm achieved lesser chroma error uv=0.001 relative to standard white light D65
enhanced chroma uniformity of illumination field.
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