Whether placed along a flattened screen or in a projector’s centre, the technology behind all LCD’s is the same. A system of Thin Film Transistors (TFT’s) supply voltage to cells filled with liquid crystal placed between two glass sheets.

When subject to electric current the crystals untwist to a perfect degree to filter white light emitted by a lamp placed behind the screen, in the case of Flat panel TV’s or trough a small LCD chip projection , in the case of Projection T.V.

LCD monitors produce color through a subtraction process. They block away color wavelengths of particular color for white light spectrum until they are left with the correct color. The light’s intensity allowed to transmit via this liquid crystal matrix enables LCD TVs to display a wide variety of colors.

LED TV’s are a new type of LCD’s. The LED’s panel is still that of an LCD and operates with the same crystal technology. The difference is the backlight changing from fluorescent to that based on LED (light emitting diode).

Regarding color performance, LCD TV’s reproduce colors by manipulating light waves and subtracting colors from white light. This is basically a difficult way to maintain accuracy and vibrancy of color. LCD’s however produce a brighter picture. It will suit a room with lots of ambient light.

LCD TV makers have done a great deal to improve the viewing angles of their displays. The best LCD TV’s have around 120 degree viewing angles.

But LCD TV’s suffer from trailer effects when individual pixels are slightly out of sync with image on screen. During fast moving scenes a discerning eye can detect this motion lag. This applies to both fluorescent backlit LCD’s and LED backed LCD’s.

LCD TV’s are also preferred on aero planes. They are not affected by increase or decrease in air pressure. They perform consistently regardless of the altitude they are operated in.

Regarding longevity, there is little to wear out in an LCD TV except for backlighting. But the fluorescent backlighting in LCD’s cannot be replaced cost effectively. LED backlit LCD’s last for a long time.