A TV that is able, a small image on a screen visible from a video signal via a push-projector TV, which is called projection. The image is projected onto a much larger, with a beam of intense light and a lens system. The TV is equipped with a projector and placed separately in front of the TV screen as a front projection. The projector has a field in the projected images from behind the screen, called a backprojectionTelevision. There are several types of projection television projector of the type and shape of the determined before the screening. These can be classified as follows:
LCD projector
For LCD LCD projector to display images, the light of metal halide lamps is passed through a prism, the light transmitted is divided into three panels of silicon clusters of red, green and blue component video signal. individual pixels are open, the lightpass or closed to stop the light, polarized light through the plates that form the polarizer, analyzer and the LCD panel. A wide range of colors and shades the image is produced by the combination of opening and closing of the pixels. For an ideal color temperature and a wider range of colors, metal halide lamps are used. Besides offering a wide range of colors, metal halide lamps have the ability to emit light on a very smallRegion.
CRT projector
With a beam of electrons at a phosphor coated screen and small CRT projector able to create an image the same way traditional CRT. There are several ways to organize the CRT. We use a tube with three layers of phosphorus that is covered with red blue and green. The other is to turn a color wheel in the event of a hose in black and white. The last option is for the three cathode ray tubes, use one blue, one green and one red.
BenefitsAnd the trouble for CRT projectors
TV Hitachi projector consists of a cathode ray tube, a projector, which has its advantages and disadvantages compared to other types of projectors and LCD models. The CRT projector has the following advantages: the CRT projector can display different resolutions, as it is not limited to fixed resolutions. It can also be a large black and contrast ratio. The CRT projector also happens to have more timeLifetime of LCD models are compared and provide brilliant color reproduction. As for CRT projectors have several advantages over their competitors LCD, there are some disadvantages. These include: CRT phosphor burn tends to be based. Depth as the CRT projector is very cumbersome, and concentration, unlike LCD projectors problems, which is exactly the opposite. Additionally, to replace the conservation of color and brightness adjustment for the other two CRTs, even if onlyFailure.
Advantages and disadvantages of LCD projectors
What is with the LCD projector, is much smaller than CRT projectors. It 's also very easy to replace or repair, compared with CRT and LCD chip is not subject to burn-in, unlike the CRT. The pixels are visible on the big screen to show the viewer looking through the screen. There's a good chance of defective pixels. Has less corners of the CRT.
