cree is a company offers some high performance led chip and lamp product, its website is: http://www.cree.com/
and there is one kind of neutral white color led:
Innovative Package – XLamp MC-E Color
specification:Color | Max. Current (mA) | Dominant Wavelength (nm) | CCT | Min. Flux @ 350 mA | |
XLamp MC-E Color | Blue | 700 | 450-465 | 8.2 lm | |
Green | 700 | 520-535 | 67.2 lm | ||
Red | 700 | 620-630 | 30.6 lm | ||
Cool White | 700 | 5700K – 7000K | 95 lm | ||
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Blue | 700 | 450-465 | 8.2 lm | ||
Green | 700 | 520-535 | 67.2 lm | ||
Red | 700 | 620-630 | 30.6 lm | ||
Neutral White | 700 | 3700K – 4300K | 80 lm | ||
coefficient of utilization:
but we want to project the led array image to the desk, then we need a lens, the best solution is one led array plus one big lens, but until now i can not find the similar design on the market, most product will use one lens plus one led, but the design would be too big for our project,
much information can be found on this page: Efficient High Brightness LEDIL LED Lenses
and many types of shape can be projected like the below picture:
and there is some kind of high power led array on the market:
...
some kind of led light collector:
i wonder if one large lens can collect light from each led of a led array?watch something interesting on youbube:
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