- Oct 14, 2008
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From the Wiki article about DLP, I only listed the cons which I consider to be the most important:
- Some viewers are bothered by the "rainbow effect" - particularly in older models (explained above).
- Replacement of the lamp / light bulb in lamp based units. The average life span of a mercury lamp averages 20005000 hours and the replacement cost for these range from $99 350, depending on the brand and model. Newer generations' units use LEDs or lasers which effectively eliminate this issue, although replacement LED chips could potentially be required over the extended lifespan of the television set.
- Some viewers find the high pitch whine of the color wheel to be an annoyance.[7][8][9] though the drive system can be engineered to be silent and some projectors don't produce any audible color wheel noise.
- Dithering noise may be noticeable, especially in dark image areas. Newer (post ~2004) chip generations have less noise than older ones.
- Error-diffusion artifacts caused by averaging a shade over different pixels, since one pixel cannot render the shade exactly
- Response time in video games may be affected by upscaling lag. While all HDTVs have some lag when upscaling lower resolution input to their native resolution, DLPs are commonly reported to have longer delays. Newer consoles such as the Wii do not have this problem as long as they are connected with HD-capable cables.[10]
- Reduced viewing angle as compared to direct-view technologies such as CRT, plasma, and LCD
- Some people may be able to observe a phenomenon in which the projected contents appear to be cycling through it colours for the duration of the presentation. This is most easily seen by using a camera's 'live view' mode on projected content.
- Some viewers are bothered by the "rainbow effect" - particularly in older models (explained above).
- Replacement of the lamp / light bulb in lamp based units. The average life span of a mercury lamp averages 20005000 hours and the replacement cost for these range from $99 350, depending on the brand and model. Newer generations' units use LEDs or lasers which effectively eliminate this issue, although replacement LED chips could potentially be required over the extended lifespan of the television set.
- Some viewers find the high pitch whine of the color wheel to be an annoyance.[7][8][9] though the drive system can be engineered to be silent and some projectors don't produce any audible color wheel noise.
- Dithering noise may be noticeable, especially in dark image areas. Newer (post ~2004) chip generations have less noise than older ones.
- Error-diffusion artifacts caused by averaging a shade over different pixels, since one pixel cannot render the shade exactly
- Response time in video games may be affected by upscaling lag. While all HDTVs have some lag when upscaling lower resolution input to their native resolution, DLPs are commonly reported to have longer delays. Newer consoles such as the Wii do not have this problem as long as they are connected with HD-capable cables.[10]
- Reduced viewing angle as compared to direct-view technologies such as CRT, plasma, and LCD
- Some people may be able to observe a phenomenon in which the projected contents appear to be cycling through it colours for the duration of the presentation. This is most easily seen by using a camera's 'live view' mode on projected content.
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