subject: The Differences Between Lcd And Led Tvs [print this page] LED televisions are basically just LCD televisions that use LED lights for back lighting instead of the fluorescent CFL lighting traditionally used for LCD TVs. Both LED and LCD use the liquid crystal diode (LCD) technology.
Colour Accuracy:
With white LED backlights the difference between the two technologies isn't very significant, however RGB colored lights have an advantage in displaying realistic color.
Contrast (Black Levels):
LCD panels create dark tones by blocking the backlight passing through the panel; this method for displaying black is prone to problems. Local dimming LED back lighting offers a solution to this problem, by dimming the backlight in areas where the screen should be dark. Edge lit LED will have brighter whites than that of an LCD TV, however they lack the control that local dimming provides. So, to summarise, local dimming LED TVs have an advantage in both contrast and black levels.
Viewing Angles:
The factor that seems to have the greatest impact on the quality of different viewing angles is the quality of the clear glass panel on the front of either an LED or LCD TV. Generally speaking the thicker and higher quality the glass panels the better the viewing angle but the worse the glare. Anti-glare technologies do work but they tend to reduce the quality of the picture. So in conclusion local dimming LED TVs fair better when it comes to viewing angles.
Fast Moving Video Playback:
The quality at which a TV displays fast moving images is subject to the response time and the refresh rate, something that will vary from brand to brand. These factors are not affected by the backlighting of a TV; therefore any discrepancies will not be due to whether or not the TV is LED or LCD.
Features:
Some TVs have separate settings for different functions. For example, TVs with a gaming mode are able to cut down on the amount of picture processing in the TV. This in turn reduces any lag that might be caused by the TV processing being unable to keep up with the speed of the game. Again, the backlight of the TV doesnt really affect this aspect; however LED TVs tend to have more features due to their higher costs.
Lifespan:
Most TV manufacturers claim a lifetime of 100,000 hours for their TVs. LED TVs are pretty new so there isnt much of a track record, though LEDs typically last a while.
