LED and LCD--Apollo
LED display can deliver higher contrasts, deeper blacks and wider viewing angles than LCD screens, though at the cost of greater power consumption.
Liquid Crystal Displays
According to the LCD TV Buying Guide, a liquid crystal display (LCD) uses electrically charged crystals that twist or untwist to create colors and images among its matrix of pixels.
Light-Emitting Diodes
While technically a type of LCD technology, the light-emitting diodes of an LED display use tiny semiconductors called diodes that switch on or off in response to electrical signals, according to Big TV.
Backlighting
Traditional LCD display use fluorescent backlighting and must block the light flow to create black areas. Many LED displays can selectively turn off their diodes in dark parts of the image, creating deeper blacks.
Performance Differences
LEDs with RGB (red-green-blue) backlighting can produce more accurate colors and a wider viewing angle than LCD, though at a cost of greater power consumption.
Lifespan
Since manufacturers introduced LED display relatively recently, manufacturers can only guess about their longevity, but these devices should retain their color purity longer than LCD display.