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One problem: Shenzhen,[link widoczny dla zalogowanych], a well-known LED company engineer Liu Q: 1, on the low color temperature white LED with high color situation: Color temperature 2700-3500K,[link widoczny dla zalogowanych], 82lm flux above,[link widoczny dla zalogowanych], color rendering index (Ra) 80 or more. What programs do you think? 2 spot on the LED problem: light-emitting angle of about 80 ° angle, not after exposure around the macula, the yellow line, you have any suggestions? A:
The two issues raised by Mr. Liu is currently a lot of R & D staff is very concerned about packaging factory technical problems,[link widoczny dla zalogowanych], as people on the human visual health awareness, high color rendering white LED product has large market demand, and the low high color temperature white LED color rendering is a difficulty.
In this, I reply as follows: high-low color temperature color scheme are: (1) The preparation of high-chip RGB trichromatic color white LED; (2) using InGaN blue LED excitation RGY phosphors were prepared by high color white LED; (3) using UV-LED excitation Preparation RGB color phosphor white LED. Since paragraph (1) program costs are relatively high (3) Technical and temporarily mature, so the market mainly in subsection (2) program. Cree, C adopt such programs.