This article acts as a basic guide in differentiating rear projection displays with other display technologies. There are major technological differences between them, which are highlighted below. Many people are usually confused by the many different words that are being used in the electronic display industry today. In order to make the best choice, one needs to understand the technology used by each and its usefulness.
It actually depends on the purpose of the display. A different technology is suitable to be used as televisions while a different one for Digital Signage.
Rear projections TVs have a projecting lamp behind the screen that projects pictures or videos on the screen. This technology are sometimes also called as the micro display technology. It is quite different from the CRT technology, which is the most traditional one.
There are certain types of micro display available in the market, some of which are listed below-
It is easy to distinguish a CRT display from micro display from its appearance.
Plasma televisions are mostly in the form of a flat panel as their technology requires a very small space. It works in a similar way. It uses Xenon gas between two glass panels called plasma. An electric charge when run through, it produces different colours, hence displaying the image.
The CRTs used a vacuum tube through which an electric beam is emitted on the screen that lights up the phosphors.
Liquid crystal display televisions are a bit different from the liquid crystal display rear projecting systems, because in rear projection LCDs create an image through a LCD chip which is transparent. In this the chip has different pixels forming an image, which is then magnified to the screen.
It is a fact that micro displays are very compact in size compared to most of the display forms like CRT. With the introduction of HD rear projection TVs, the micro displays are becoming extremely popular.