In the event you’ve been thinking about shopping for a home theater projector, perhaps to connect with an HDTV tuner, and have read evaluations or completed a bit of 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, but they work in quite alternative ways and produce slightly totally different results. Should you ask round ‘ particularly in electronics shops, you are likely to be supplied with a mass of knowledge that’s confusing and infrequently just plain wrong. So 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 via the LCD panels, particular person pixels (or picture components) could be either opened or closed to both permit light to pass through or be filtered out. In this way the light is modulated and an image projected on to the screen.
LCD projectors have historically had three main advantages over DLP. They produce more accurate colors (due to the three separate LCD panels), they produce a slightly sharper image (though this is pretty much as good as undetectable when watching films) and they are more light-environment friendly, which means they produce brighter images utilizing less power.
Nonetheless, LCD projectors also have some disadvantages, though as the expertise improves these are becoming less and less relevant. The primary of these is pixelation, or what’s often known as the screen door effect. This signifies that sometimes you’ll be able to see the person pixels and it seems as though you’re viewing the image via a ‘screendoor.’ The second historic disadvantage of LCD v DLP is that LCD does not produce absolute black, which signifies that contrast is less than you’ll get with DLP.
However, the advent of higher resoltion LCD projectors (particularly ‘HD-ready’ projectors which have a horizontal resolution of 768 pixels or higher) implies that pixelation is less of an issue than it used to be. And the improved potential of LCDs to provide high-contrast images can be permitting them to be taken more critically by home theater enthusiasts.
Digital Light Processing (DLP) is a technology 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 turn the pixel on or away from it to show it off. Most DLP projectors have only one chip, so with the intention to reproduce coloration, a colour wheel consisting of red, green, blue and typically, 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 Projector chip tilts towards or away from the lens path depending on how much of a specific color light is required for that pixel at any given instant.