HDTV Forum

i think LCD is better then DLP.

anjle wrote:i think LCD is better then DLP.

Better in what way? Based on what?

I would say LCD because DLP big screens still require a phosphorus screen to display the image. These screens eventually go from black to gray (due to the natural effect of light hitting it so much) therefore degrading the image. This is one of the reasons why HDTV projection tv's suck in the long term.

Unless my understanding of DLP is woefully inadequate this is not true.
DLP does not use phosphorus it uses mirrors on a chip.
Hence it has super bright output.
Professionally, I can tell you that it makes for very bright projectors
in theaters and rock concerts, etc.
The most expensive ones use three chip sets and combine a Red/Green/Blue
image to form one full color projected image. These are the best and cost.

Brian.

You are correct Brian, DLP uses a 'chip' with an array of tiny mirrors electronically microscopically tilted to focus pixels of light through lens and mirror to screen. Original DLP sets and most current use a moterized wheel of color panels rotating between a High Intensity Light source and the DLP array to provide the colors. Some current DLP sets use LED color light source to eliminate the motorized color wheel mechanism.
Original projection sets (front and rear) used red, blue and green CRTs. This seems to be the technology chiques is thinking of.
My first HDTV was an RCA 61" rear projection using CRTs. I enjoyed it very much for about 6 years when I replaced it with a Samsung 61" DLP with their new LED light engine. It has been great (for a year now).
For the larger screen sizes (>52") the DLP offers a significant price advantage. I also like that I can't see the actual pixels at close viewing. The LED light engine should last the life of the set and should not shift in intensity and color as with a high intensity bulb. Also, it eliminates the (hi failure possibility) mechanical color wheel and motor. Elimination of the color wheel also has the advantage of not having the 'rainbow' effect some individuals perceive when viewing a DLP set.

From the initial question, the question is comparing LCD display technology to DLP technology. Yes, I agree; projectors do not use a phosphorus screen, but "television" DLP displays do. The DLP chip is simply what creates the image.

If you use a projector, to get maximum image quality ambient light must be at a minimum (pretty much dark). Unless you have really nice expensive plantation type shutters (or plywood on your windows), this is not practical in most house holds during the day with basic blinds or curtains.

Forget about using a projector to watch something outside during the day.

sorry to be pedantic but DLP means the mirrors on a chip system. No phosphors involved.
The screens are plastic special purpose RP screens built into cabinets to make DLP Televisions.
If you have any other questions check out the web site of the manufacturer, Texas Instruments.

http://www.dlp.com/tech/why.aspx

The version you may be referring to is RP (rear projection) using CRT guns. This is 20 year old tech.
Nothing horribly wrong with it except that it is expensive, low output, and a pain in the bum to register correctly.

And if you have a professional 3 chip DLP projector you will be able to see it fine in daylight. We are talking about
5K to 10K lumen output levels. These projectors cost upper 5 to lower 6 figures so most people will have never used
them. I am a stage hand so I have and they are awesome. About half of the screens you see at rock shows are DLP.

Having said all of this I will add that I know quite a few professionals that prefer the color/image rendering of LCD over DLP.
I prefer DLP's sharpness but they still prefer the smoothness of LCD instead.

Brian.

chiques,

The members are not steering you wrong... DLP does not have phosphors, only CRT and plasma.