Joined: 04 May 2005 Posts: 12112 Location: Arizona USA
Posted: Tue 20 Sep 2005, 01:53 Post subject:
It's hard to believe, but the Japanese must be more tolerant of noise than Americans if they like to use digital projectors instead of LCDs or CRTs. We sell and rent several different high-end models of digital projector, Canon being one that I can think of. Every digital projector I know of has a cooling fan for its lamp that makes more noise than I care to put up with if it's right next to me. Not to mention the heat it's blowing out. That fan is necessary because if it didn't diffuse the heat from the lamp the whole contraption would melt down.
Another thing to keep in mind about digital projectors is that if a lamp goes bad and you keep trying to use the projector, the lamp power supply may be damaged. The lamp power supply is very expensive and fragile. If it goes you have no choice but to send the projector off to be repaired, and it ain't cheap.
Lobster, the homemade projectors in the link you gave are a pretty neat idea. I've wondered if an LCD screen couldn't be used as a stained glass window. Take away its backlight and its associated junk and you ought to be able to see through the LCD. Now I see that it could be made to work.
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