Now a days many people thinking about to have a projection TV as we had already CRT TV, basically project TV works different from CRT TV, we will discuss the working of Project TV , Here

projection television uses a projector to create a small image from a video signal and magnify this image onto a viewable screen. The projector uses a bright beam of light and a lens system to project the image to a much larger size Mainly Projection TV available in two Configurations ( front projection and rear projection ) ,

front-projection system uses a projector and a separate screen, and it projects images onto the front of that screen. Here projection unit is completely separate from the screen. This setup looks like movie theater system –

Rear-projection systems look like traditional televisions.which display images on back of a screen rather than the front, and the projector is completely contained within the television itself.

Other technologies used in TV technologies are
1. CRT (cathode ray tube)
2. LCD (Liquid crystal display)
3. DLP (Digital Light Processing )
4. DMD (digital micromirror device )
5. SED (surface-conduction electron-emitter display)
6. plasma flat panel display
7. Liquid crystal on silicon (LCOS or LCoS)