LED TV Technology

The primary fact you need to know about this subject is that LED TVs use Light Emitting Diodes (LED) as the backlight as opposed to the Fluorescent Lamps known as Cold Cathode Fluorescent Lamps used in majority of the Liquid Chrystal Display (LCD) TVs. The backlighting of the LCD should be differentiated from a purely LED Display.

LED TVs which are LCD-based televisions are unlike self-illuminating Organic Light Emitting Diodes (OLED), Organic Electroluminescent (OEL) or active matrix organic light emitting diode (AMOLED) display technologies. True LED TV’s are used in concerts, stadiums and outdoor advertising. These huge displays consist of many bright LEDs.

LED TVs can be designed in various ways in relation to the placement of the LED in the LCD display. Edge-LED backlighting applies white LEDs around the inside frame of the display together with a light distribution panel designed to evenly spread the light behind the LCD display. The other method is a use of a Red Green and Blue (RGB) LEDs placed behind the display panel. This method facilitates the local dimming to create specific areas of darkness on the screen by individual switching off of individual LEDs.

LED TVs are invariably brighter and offer higher light output than the CCFL backlit TVs and they provide a higher color gamut (range of colors). This is perhaps because they can be turned off and on more quickly offering high contrast ratios. The only hindrance to the widespread use of LED backlighting on LCD TVs is the high cost of market placement.

LED TVs are more environmentally friendly since mercury is not utilized in their manufacture unlike the LCD TV and the plasma TV. However, gallium and arsenic are used in their manufacture bringing about the debate on their environmental friendliness on disposal. They are also thought to be more long lasting with a longer life and more efficient power usage than the LCD and plasma TVs.