When you’ve been thinking about shopping for a house theater projector, perhaps to hook up with an HDTV tuner, and have read critiques or accomplished a little bit of research, you will be aware that there are applied sciences competing for the contents of your wallet.
Both LCD and DLP are used in projectors suitable for residence theaters, however they work in quite other ways and produce slightly totally different results. In the event you ask round ‘ particularly in electronics stores, you are prone to be provided with a mass of knowledge that’s confusing and often just plain wrong. So right here, in an effort to clear the fog surrounding projectors, is our information to LCD v DLP.
LCD projectors have three separate LCD panels, one for red, one for green, and one for blue parts of the image being processed by the projector. As light passess by way of the LCD panels, particular person pixels (or image parts) could be either opened or closed to both allow light to pass via or be filtered out. In this means the light is modulated and an image projected on to the screen.
LCD projectors have historically had three major advantages over DLP. They produce more accurate colours (as a result of three separate LCD panels), they produce a slightly sharper image (though this is nearly as good as undetectable when watching motion pictures) and they are more light-efficient, which means they produce brighter images using less power.
Nevertheless, LCD projectors even have some disadvantages, although as the know-how improves these are becoming less and less relevant. The primary of these is pixelation, or what’s often called the screen door effect. This implies that sometimes you possibly can see the individual pixels and it seems as if you might be viewing the image by means of a ‘screendoor.’ The second historic disadvantage of LCD v DLP is that LCD would not produce absolute black, which signifies that contrast is less than you’ll get with DLP.
Nevertheless, the advent of higher resoltion LCD projectors (significantly ‘HD-ready’ projectors which have a horizontal resolution of 768 pixels or greater) means that pixelation is less of a problem than it used to be. And the improved capacity of LCDs to produce high-distinction images is also allowing them to be taken more critically by dwelling theater enthusiasts.
Digital Light Processing (DLP) is a know-how developed by Texas Instruments and it works by projecting light from the projector’s lamp onto a DLP chip, made up of thousands of tiny mirrors. Every mirror represents a single pixel and directs the light projected onto it either into the lens path to show the pixel on or away from it to show it off. Most DLP projectors have only one chip, so to be able to reproduce colour, a colour wheel consisting of red, green, blue and generally, 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 away from the lens path depending on how much of a selected colour light is required for that pixel at any given instant.