LED based Rear Projection sets?

Question

Are they really that much better than standard bulb based dlp sets and are they less repair prone.

Answer 1

They are that much better....Less HEAT, less repair. Lower power demands means less cost to you.

And they don't need the lamp replaced every 2 to 3 years at $250 each.....

Answer 2

LCD flatscreens are a lot lighter than Plasma TVs which weigh over a 100 lbs. Nevertheless, LCD flatscreens may have limited viewing angles and can suffer from dead pixels. While Plasma TVs are very suspectible to ghosting which is the result of having a fixed image inadvertently left on the screen for a long period of time. This fixed image will literally remain as a ghost image backgrounded to the screen. Usually the solution is to install a floating screen savers which is activated when the screen is not active.

And then there are rear projection LCD's and DLP's which use mirror panels and color wheels to filter and project a very large screen image [ranging from 65" to 72" diagonally measured]. The major concern is replacement cost of lamps which usually cost between $200 - $300 and last any number of hours depending on how the TV is shut off. Failing to properly shut down either LCD or DLP units which involves leaving on the main fan running for some 20 minutes -- will result in early failure of projection lamps. And there's the added concern regarding the use of "organic" material which make up the LCD panels/mirrors and usually causes the blue panel to fade over a period of time. So you may have to look forward to purchasing a new LCD projection TV. But getting back to DLP projection TV, there is the issue of viewers seeing the dreaded "rainbow effect" which are color flashes appear in highly contrasty dark scenes. Their sighting can cause headaches and is quite annoying to the viewers. And a possible cure is to choose a color wheel which operates faster than 3X; say 4X which seems to be the threshold speed that virtually eliminates the rainbow effect.

And finally, we should also consider the "ultimate, best" TV technology: "Front Projection."

You may well want to check out another technology: DLP front projection which produces a movie-like experience of HD television, DVDs, videos and games. And according to Consumer Reports, "front projection has a superior image -- better than CRT's, LCDs or plasma."

Check out the reviews for a "92" DLP generated [front projection] TV image at amazon.com by submitting the search query: "Infocus SP4805." There are any number of customer submitted pictures of projected HDTV image(s) along with other high-quality regular DVD-movie images projected on bare white wall surfaces. And the price for a refurbished ScreenPlay 4805 is about $550 with lamps costing around $330 which will last around 4,000 hours. Also check out various reviews at Consumer Reports [November 2005 & December 2006] in which front projection is rated "superior" to plasma, lcd.

Good luck!

Answer 3

I'm assuming you mean rear projection LCD...

Rear projection DLP and rear projection LCD are very similar technologies. They BOTH use the same style of high power lamp and ballast power supply. The only difference is in the optics; although they both have an optical engine assembly, if you can put one of each side by side, insert a high quality HD signal, you shouldn't be able to see much difference, if any.

Answer 4

LED projection sets have an even lighting system. Where old standard bulb sets are brighter in the center.

Answer 5

You don't need a color wheel and you don't need to replace the light bulb. But not as bright. In some cases, it is cheaper (and better) to get a plasma!