If you happen to’ve been thinking about buying a home theater projector, perhaps to connect to an HDTV tuner, and have read opinions or carried out just a little bit of research, you’ll be aware that there are two applied sciences competing for the contents of your wallet.
Each LCD and DLP are used in projectors suitable for house theaters, but they work in quite different ways and produce slightly totally different results. When you ask around ‘ significantly in electronics shops, you are prone to be supplied with a mass of knowledge that is complicated 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 elements of the image being processed by the projector. As light passess by means of the LCD panels, individual pixels (or picture parts) might be either opened or closed to both enable light to pass by 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 foremost advantages over DLP. They produce more accurate colors (as a result of three separate LCD panels), they produce a slightly sharper image (though this is as good as undetectable when watching movies) and they are more light-efficient, which means they produce brighter images utilizing less power.
However, LCD projectors even have some disadvantages, though as the know-how improves these are becoming less and less relevant. The first of those is pixelation, or what’s referred to as the screen door effect. This means that sometimes you’ll be able to see the person pixels and it appears as if you are 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 implies that contrast is less than you would get with DLP.
However, 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 means of LCDs to supply high-contrast images can be permitting them to be taken more significantly by house theater enthusiasts.
Digital Light Processing (DLP) is a expertise developed by Texas Instruments and it really works by projecting light from the best 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 just one chip, so with a view to reproduce shade, a colour wheel consisting of red, green, blue and sometimes, white filters is used. The wheel spins between the lamp and the chip and modifications 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 specific color light is required for that pixel at any given instant.