LCD ( Liquid Crystal Display) TV

LCD technology is based on thin film transistors which are transistors or capacitors that control the supply of voltage to the liquid crystals held between two pieces of glass. When a charge is applied, the liquid crystal untwist and light is filtered through.

The screen sizes of LCD TVs are typically limited up to about 30 inches and may be better suited in a bedroom or a kitchen. The reason why the screen isn't bigger is because the bigger the screen, the more pixels and therefore more transistors are used. There is a greater likelihood of faulty or defective transistor.

The best thing about LCD TV are their slim profile and measure 4 inches thin or less. They are also much lighter than a conventional CRT Tube TV.

An interesting fact about LCD TVs is that they are not affected by magnetic fields generated by loudspeakers.

LCD screens are poor in displaying fast moving action otherwise known as response time. You'll see ghosting and blurred images when an object moves fast.

Contrast ratio is not as good as CRT technology or plasma technology. Their blackest black is still a very dark gray.

Another limitation is the viewing angle. If you move to the right corner, images might start to be fuzzy. The horizontal viewing angle is between 150 to 170 degrees which is less than plasma TVs.

The plus points of LCD is that it consumes less energy and the backlight typically last up to 50,000 hours.

LCD screen also do not suffer from burn in as found in plasma display technologies.

A typical screen contains more than 750,000 pixels and each pixel is controlled by three transistors Therefore there is a possibility of a faulty pixel or transistor appearing. Consumers need to find out how many dead pixels constitute as defect for replacement or repair as well as the period of guarantee.