Subject: Re: Making a projection TV
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Date: Mon, 16 Sep 2002 14:29:55 GMT
NNTP-Posting-Date: Mon, 16 Sep 2002 10:29:55 EDT
Organization: Cox Communications
"Mike" wrote in message
> Does anyone happen to have those plans on how to make a regular TV into a
> projection TV?
> Just curious, people tell me it's a fun little project to mess with.
Maybe fun, but probably somewhat disappointing. Here's one such device:
They claim, "This system works on the principle of video image projection.
Using your existing television or cpu monitor, our system will process the
light spectrum, enhance the brightness level, focus the image, and finally
project this image on to any type of screen. A typical 13 or 19 inch screen,
for example, can be converted into a 100 inch display with very little video
distortion. This system will modify any size screen."
That's not entirely true: as a passive system, there's no way for it to
enhance the brightness level unless the device doubles as one of those
amazing over-unity power generators.
On their introductory page, they say, "Chris built a new projector last
week, which uses 2 lenses, placed back to back, and projects a 6x's [sic]
projection. This Projector has a crisp clean picture, and has the best
effects, as with most of our projectors, with the lights dimmed."
The reason the lights have to be dimmed is that the brightness is, at best,
the same as your original TV. If you expand the picture from a 13" set up to
100" without increasing the intensity, the expanded picture is going to have
1/60 the intensity of the original.
As if all that's not enough, it will be difficult to be a couch potato with
this thing, since the actual TV will now be next to you, with a big
light-proof box over it. Most modern remotes use infrared...
-- Mike --