How Does Rear Projection Television Work?

Video Transcript

"OK how does rear projection TV work? Well basically there's a projector in the back of the cabinet of the television and the projection image is reversed so when it hits the front of the screen, it produces a normal picture. Typically the distance of the signal being traveled from the picture tube guns in the back of the set are about this far which is about two feet and each one of the three guns has your three primary colors, red, green, blue and those colors mixed together will produce the proper image on the front of the screen. Typically rear projection sets are somewhat dimmer than the newer plasma or LCD television sets and you sometimes have to be pretty much looking straight at the set from an image about 90 degrees away from the front of the screen to get a nice bright image. Also they're better in if they're used in a darker atmosphere, darker setting. Projection televisions are also somewhat heavy, more difficult to move, they also require more space because they're approximately two feet deep. So they are not as desirable as the new plasma or LCD TVs."