LCD

Stands for "Liquid Crystal Display." LCD's are super-thin displays that are used in laptop computer screens and flat panel monitors and most modern day TV's. Smaller LCD's are used in handheld TVs, PDAs, and portable video game devices. The image on an LCD screen is created by sandwiching an electrically reactive substance between two electrodes. This color of this substance can be changed by increasing or reducing the electrical current. Since LCD screens are based on the principle of blocking light (rather than emitting it), they use up much less power than older CRT (Cathode-Ray Tube) monitors.

LCD TVs come to life when light from behind the screen is shone through a matrix of tiny, coloured liquid crystal cells. Signals control each cell, letting varying amounts of color through to build up the picture. LCD has a much better picture quality than a Plasma screen, however, been eclipsed by LED as the most popular TV technology. You might still find LCD TVs available in smaller screen sizes at the budget end of the market, but most manufacturers are now focused on LED.

Take a look at the video below which explains the detail behind how LCD technology works.

 

 

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