LCD rear projection hdTV
The LCD rear projection hdTV is not based on the traditional projection tube. A rear projection LCD TV fundamentally works by passing a powerful light source through a transparent LCD chip made up of individual pixels (which displays the moving video image) and projecting that image through a magnifying lens, to a mirror, which then reflects that image, onto a screen. The actual term “rear-projection” comes from the fact that the image is projected and reflected onto the screen from behind the screen, unlike traditional video and film projection in which the projector itself is placed in front of the screen. As a result, only the LCD rear projection TV, with its lower pricing yet high performance, is taking center stage in the consumer television market. Many are predicting the failure of rear projection as prices of large-screen LCD and plasma TVs continue with their fast downward trend.
The LCD projector is assembled in a very compact manner, since the LCD chip is very small. One LCD chip is hundreds of times smaller than the three projection tubes needed in CRT-based rear-projection televisions. Because of this the LCD rear projection hdTV can be made a lot thinner and lighter than traditional CRT-based rear-projection sets. Even though one cannot hang it on the wall as with an LCD flat panel or Plasma Television, but yes for sure one can still save a lot of floor space, and spend less money than one would buying that stylish LCD flat panel or Plasma set. In addition, since these are projection sets, can get one in larger screen sizes than you can with either LCD or Plasma flat panel types. And the other advantage of rear projection LCD technology is its high contrast and brightness capability, as well as lower power consumption.
Rear projection LCD TV
There are certain limitations like A rear projection LCD TV can often times exhibit what is called “the screen door effect”. Since an LCD chip is made up of a panel of individual pixels, if one pixel burns out it displays an annoying black or white dot on the projected image. The LCD chips are very costly.
“Microdisplay” refers to any rear LCD projection TV that uses one or more microchips–again, DLP is the only one currently being manufactured–festooned with thousands or a just over a million pixels as part of a light engine. The light engine is driven by a lamp that bounces light off of chip, through an assembly that produces color, and onto the big screen.
