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TFT Display: Resolution, Color Intensity, Response Time

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12:02 PM - 11/13/2004 by Frank Völkel

Getting hold of a suitable TFT panel presents no difficulties, as we said before: an old 15.1" flatscreen monitor makes the ideal basis for building a powerful projector. Most displays offer a physical resolution of 1024x768 (i.e. 786,432) pixels, for playing back high-quality DVD videos or displaying the Windows screen. Some models even offer resolution of 1280x1024 pixels, making them suitable for 3D games, too.

Designation Resolution Pixels Suitability
VGA 640x480 307,200 unsuitable
SVGA 800x600 480,000 partially suitable
XGA 1024x768 786,432 highly suitable
SXGA 1280x1024 1,310,720 highly suitable
UXGA 1600x1200 1,920,000 -
WUXGA 1920x1200 2,304,000 -

The table above lists the principal resolutions; note that resolutions higher than SXGA are seldom available in 15" format, with the exception of some notebook displays. This means the display no longer fits the overhead projector, as its dimensions exceed the light frame. The panel on our projector was taken from an older flatscreen from Iiyama, the 15.1" BX3814UT .

Aside from display size, simple disassembly was a major criterion in our search for a suitable flatscreen monitor. Several factors must be taken into account to avoid destroying any components.

We don't really need to mention color accuracy, as almost all older displays support 24 bit color depth, and hence 16.7 million colors for perfect DVD screenings. Response time poses no problems, even on relatively small displays up to 15 inches: less than 30 ms average is completely adequate for perfect picture reproduction.

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Anonymous 10/20/2008 12:14 PM
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Hi,
I'm a 12 year old and I just got this projector working. If you live in the bay area then I recommend you go to Weirdstuff that is where I got all my parts for all under $46

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