If you’ve been thinking about buying a home theater valuable projector, perhaps to hook up with an HDTV tuner, and have read critiques or done slightly little bit of analysis, you may be aware that there are applied sciences competing for the contents of your wallet.
Both LCD and DLP are utilized in projectors suitable for home theaters, but they work in fairly different ways and produce slightly completely different results. When you ask around ‘ notably in electronics shops, you’re prone to be supplied with a mass of information that’s confusing and sometimes just plain wrong. So right here, in an effort to clear the fog surrounding projectors, is our guide 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 means of the LCD panels, individual pixels (or picture parts) could be either opened or closed to either permit light to pass by or be filtered out. In this manner the light is modulated and an image projected on to the screen.
LCD projectors have historically had three fundamental advantages over DLP. They produce more accurate colors (due to the three separate LCD panels), they produce a slightly sharper image (although this is pretty much as good as undetectable when watching motion pictures) and they are more light-efficient, which means they produce brighter images using less power.
However, LCD projectors also have some disadvantages, although as the know-how improves these have gotten less and less relevant. The first of those 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 are viewing the image by way of a ‘screendoor.’ The second historic disadvantage of LCD v DLP is that LCD would not produce absolute black, which means that distinction is less than you’ll get with DLP.
However, the advent of higher resoltion LCD projectors (significantly ‘HD-ready’ projectors which have a horizontal resolution of 768 pixels or better) implies that pixelation is less of a problem than it used to be. And the improved capacity of LCDs to provide high-contrast images can be allowing them to be taken more seriously by residence theater enthusiasts.
Digital Light Processing (DLP) is a expertise developed by Texas Instruments and it works by projecting light from the projector’s lamp onto a DLP chip, made up of hundreds 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 turn it off. Most DLP projectors have only one chip, so in order to reproduce colour, a color wheel consisting of red, green, blue and generally, white filters is used. The wheel spins between the lamp and the chip and changes the colour of the light hitting the chip from red, to green, blue. Every mirror on the DLP chip tilts towards or away from the lens path depending on how much of a specific colour light is required for that pixel at any given instant.