Originally Posted by Highjinx
I think LED lamps are not as cool running as we would like, seems like the few LED projectors out now are larger due to the additional cooling requirements.
If size reduction is a must an outboard lamp module, light tranmitted via fiber optics will keep the main projector size down, but I think manufacturers will keep the projectors of a particular size so they can charge accordingly due to the 'size' value factor.
I was sent a link with a projector using an external light source. It looked like a neat idea. The light house was about the size (footprint) of an A4 piece of paper and the projector was about half the size. it apparently used optic fibre to send light.
Last year I got to meet a guy at SMPTE that claimed that he was a part of the "LED design committee" (if such a thing exists). He described the (at the time) current gen of of LED as arrays (say 20 Red, Green, Blue, Yellow and Magenta - he didn't mention Cyan per array) of LEDs where each LED could turn on/off independently. The arrays worked with a single DLP imaging chip. By the way he described it, it would explain to the size required for the chassis to physically contain these units.
I don't think LEDs generate heat as such. JVC gave me a single, very bright LED light for my keys. This is very bright, yet is cold to touch, unlike a traditional element lamp that produces heat and light. I still would like to see UHP lamp replacements made using these. If one LED is this bright, imagine 16 or so with a reflector behind them.