From LCD to LED, television technology is evolving quite dynamically and very fast. The slim size and flat surface picture offered by LED HDTVs have already made a mark. So what is the difference between the LCD and LED HDTV? Check out some points here to understand the unique features of this latest LED version in the market.
Salient features of the LED HDTV are an improvised version of LCD and are not a new technology. It is the same LCD TV with the only difference in the backlights. In LCD televisions, behind the display panel, backlights are used for creating clear televised images. Some companies also use fluorescent lights for an enhanced effect in LCD. Two main types of LED (light emitting diode) version are available which differ only because two different ways of backlighting are used in them. Local dimming LED uses full length lights and the whole width of the panel on display. The panel light can dim, turn off, or even brighten on its own according to requirement of the picture displayed. Edge lighting is used in LED HDTVs and the lighting is placed only along the edges of the display due the light traveling inwards when projected. The lightall LED screen is more advantageous than dim lighted screens because, due to placement of the lighting at the edges, very slim and thin panels or cabinets are possible.
Two types of LED-HDTV
Today, LED is the latest version of television that is finding importance in every household. Until just a couple of years back, the LCD HDTV or liquid crystal display was the most popular technology in visual display. Today however LED is preferred more and is the latest craze.
LED (light emitting diode) televisions are just as slim with a flat screen display like the LCD. The difference is in the way backlighting is arranged in these televisions. Apart from television, these screens are also being used for laptops, computers, digital clocks and calculators. The LCD HDTV makes use of fluorescent lights mostly which are arranged in the back of the screen.
Two types of LED back lighting
The lights on screen with LED display are arranged in two types:
Local dimming: In this HDTV, full length lights are used that encompass the whole width of the screen or display panel. These have the special ability to adjust the picture lighting on the screen on their own. They can turn off, brighten or become dim on their own. But at times due to this arrangement brighter areas seem to bleed into the darker zones that can diminish the blackness of dark areas.
Edge lighting: In this type of LED-HDTV the lights are arranged at the corners or the edges of display panel. Here the light meets at the center of the screen making it possible to prepare a slim cabinet or panel. The uniformity is not as good as can be achieved by local dimming.
Both these types of LED TV are known to use comparatively lesser energy than the LCD version. Some brands of LED consume 40 percent less energy than their LCD models. This is one of the reasons why people are quickly replacing their LCD and going for LED.