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LED televisions are very popular. Consumers are replacing cathode ray televisions with modern LED TVs in large numbers. Some consumers go to their local electronic super store and buy a model a part time salesperson says is best. The consumer looks briefly at the picture on the LED TV display unit. A sale takes place if the picture looks good and the sound is okay according to the consumer.

Smart consumers take time to learn the technology aspects of an LED fasadskylt  TV before making a purchase. The goal of this article is to help consumers understand technology as it applies to choosing LED televisions.

Before LED TV technology, televisions were the cathode ray type. A projected ray of charged particles struck the inside of a large vacuum tube. Luminescence caused the particles to appear on the screen in a quickly repeating series of lines, one line at a time. Because of the fast projection, the picture appeared to occur all at once.

LED television technology is much different. A light shines behind groups of crystal pixels set in a box like grid pattern. Each pixel has three sectors with each one of the three primary colors. The light that shines from behind the grid will shine through to the front of the screen if fasadskylt  not controlled in some manner. An electronic gate controls how much light can shine through each of the pixel grid areas. This determines the amount of light and color that is visible on the LED television screen.