Projection Tv Convergence

There was a time, not so long ago, when huge television screens and home theaters used to be considered as 'rich man's toys'. Not any longer. Large screen television viewing has come of age and today these are common sights in many homes. People like giant screens because they display magnificent, life-like images. Not that the traditional CRT (cathode ray tube) TVs were incapable of this, but projection TVs is capable of reproducing very large pictures and front and rear-projection televisions are available within a wide range of design, style, features and also budget.

The underlying mechanism of action of a projection television is the usage of three different cathode ray tubes which divide the video signal into three distinct colors - red, green and blue. Permutations and combinations of these three colors can actually a wide array of colors. Inside the television box, these three cathode rays converge on a mirror which then bounces back the combined effect of the colors on a screen. In projection TVs, the size of the cathode ray tubes play an important role, as the bigger they are, the more accurate and life-like the images get.

Convergence in a projection TV, means the way the three colors, red, green and blue are arranged to create the final singular image. The more specific and accurate the convergence, clearer the picture. Checking the convergence setting in a projection TV is considered to be one of the most important aspects, before buying a TV. While the convergence is accurately set by the manufacturer, at times, shifting the projection TV may leave the convergence imbalanced. Ideally, your projection TV remote should provide a 9-point convergence control, to enable the viewer to finely adjust the colors according to his or her personal preference.

Lenses used inside the projection TVs and convergence are inter-related. You must remember that all lenses are not same - which causes different varieties of sharpness which you see on screen. Normally you will see the fading areas around the outer edges of the screen - so remember to look at the edges when you buy.

All of us have viewed televisions installed at different places, where the colors seem either too strong or too faded and washed out. This could happen if the lenses inside the projection TVs are not in alignment, which causes the colors to miss the synchronization. Most projection TV brands carry convergence adjustment. The more expensive and better TVs carry auto convergence facility through the press of a couple of buttons on your remote. Of course convergence can be adjusted manually too, except that it can take a lot of time and disturb your viewing time.