Originally Posted by Bsims2719
As far as heat generation I was thinking in relative terms. One of the main advantages of LEDs was that they are more efficient, produce less heat, than standard bulbs. However trying to make these projectors so small they have become really inefficient at removing heat due to the limited fan size. If you were to put this same light engine into a form factor or case size of a typical projector (larger fan) the noise level would drop much lower.
To me some company could really hit a home run by putting an LED light engine in a typical home theater projector. Give us a larger fan, a zoom lens and about 400 lumens and it would sell like crazy. If Vivitek can make a profit at 499 surely they could make something like this for under a grand.
Yeah they produce a lot less heat than a bulb but they are much more sensitive. I am pretty sure you are right though, that in an equivalent sized enclosure it would need less cooling. Then again I do not know much about projector bulbs so I am comparing to halogen and incandescent, maybe they are efficient (doubt it judging by the heat blasting out of my HD70 though).
I think the problem is that companies using LEDs are not ready to compete with full-sized projectors yet. LEDs gave them this new market that they could not get to with bulb technology so they are unfortunately trying to take advantage of that. They do not need as much brightness as well which has always been a sticking point with LEDs, they are efficient but getting the amount of light needed to compete with a bulb projector is quite difficult. Hopefully though, their experience in this portable market will carry over and result in more efficient and better packaged non-portable projector designs.
Have to extend my thanks to all you early adopters, looking forward to any information you guys can share when you get your projectors