If you’ve been thinking about buying a home theater projector, perhaps have read reviews or done a little research, and to link to an HDTV tuner, you’ll be aware that there are two technologies competing for the contents of your wallet. Both DLP and LCD are used in projectors suitable for home theaters, but they work in quite different ways and produce slightly different results. If you ask around ‘ particularly in electronics stores, you’re likely to be given a mass of information that is confusing and often just plain incorrect.
LCD Vs DLP Projectors
So here, in a effort to clear the fog surrounding projectors, is our guide to LCD v DLP.LCDLCD projectors have three separate LCD panels, one for red, one for green, and one for blue components of the image being processed by the projector. This way the light is modulated and an image projected to the screen. Modern Entry Chandeliers LCD projectors have historically had three main advantages over DLP. They create more accurate colors (due to the three separate LCD panels), they create a slightly sharper image (although this can be as good as undetectable when watching movies) and they are more light-efficient, which means they produce brighter images using less electricity.
Nonetheless, LCD projectors also have some disadvantages, although as the technology improves these have become less relevant and less. The first of these is pixelation, or what’s known as the screen door effect. This implies that occasionally you can see the individual pixels and it seems as though you might be seeing the image through a ‘screendoor.’ Each mirror represents a single pixel and directs the light projected onto it either into the lens path to turn the pixel on or away from it to turn it off. Most DLP projectors have only one processor, so to be able to reproduce color, a color wheel comprising green, red, blue and sometimes, white filters is used. The wheel spins between the lamp and the chip and changes the color of the light hitting the chip from red, to green, blue. Each mirror on the DLP chip tilts towards or from the lens path depending on how much of a particular colour light is required for that pixel at any given instant. The key advantages DLP has in the LCD v DLP debate is that DLP projectors are usually smaller and lighter, have better contrast, and do not suffer the same pixelation problems as LCD projectors.
There is one difficulty that some users report with DLP projectors, although it seems to only affect a tiny number of people. The picture on screen is either red, green, or blue because of the way DLP works, at any given minute. On the other hand, the images change so quickly, the human eye doesn’t detect this and your brain puts the red, green and blue images together to make a complete frame of video. Regrettably, some people can see the individual colours, and others can detect them enough to cause eye-strain and headaches. Nevertheless, technology has improved significantly with the introduction of six-color wheels and faster rotation speeds. The rainbow effect should be a problem for even fewer people. Before you buy the best way to find out if you’re affected will be to try a DLP projector, perhaps by hiring one.
Technology in both LCD and DLP projectors is improving on a regular basis. Nevertheless, at the time of writing DLP still has a little edge in the home theater marketplace.
Kenny Hemphill is the editor and publisher of The HDTV Tuner, a site which aims to cut through the confusion surrounding HDTV and provide surfers with up thus far, accurate and easy to read information.