LCD and LED TV have hugely advanced television viewing that consumers are left dumb stricken when asked which television set they prefer to buy, an LCD (Liquid Crystal Display) or LED (Light Emitting Diode) television set. Technically speaking, an LED TV is an improved version of a LCD but to get rid of confusion for consumers the television market they decided to go with a different name.
An LCD Television set offers reduced physical depth as compared to the old plasma screens and includes much higher picture resolution. The LCD television screens have liquid crystal gel placed in between the two panes of polarized glass.
LCD screens require a different light source; they are lit by fluorescent tubes as compared to plasma TVs which create its own light.
There are 3 kinds of LCD TVs:
- Flat Screen LCDs, these are more popular because of their stylish look and flexibility of standing on a surface or being mounted on the wall.
- Front projection LCDs or projectors, which project an image onto the front of the screen. The TV itself is just a box installed anywhere in a room, which projects the image onto a flat screen hung on the wall as large as 300 inches.
- Rear projection LCDs, where the image is sent from the rear of the TV to the screen in front. Rear projection LCDs are wide, heavy and only available in large sizes (60" and up).
An LED TV differs slightly with the LCD TV because it requires a series of light emitting diodes which come in three specific formats namely; White edge LED, Full LED arrays and, local dimming LED.
But to put it simply an LED TV provides a brighter display with better contrast, a thinner panel, and lesser heat dissipation than a conventional LCD TV. This is because an LED TV uses light-emitting diodes for backlighting.
Edge-LED backlighting technique allows an LCD TV to be extremely thin. LED televisions that are only 1 inch thick are also available.
There are 3 types of LED TVs based on their backlighting methods:
- Edge-LEDs (the most common) are positioned around the rim of the screen and use a special diffusion panel to spread the light evenly behind the screen.
- Dynamic RGB LEDs: This backlighting technique allows specific areas on the screen to be dimmed.
- Full-array LEDs where LEDs are arranged behind the screen as a set, but are incapable of dimming or brightening individually.