The difference between LCD display and LED LCD

by:Genyu     2019-12-31

LCD display screen is to place a liquid crystal box in two parallel glass substrates, and TFT (Thin Film Transistor) The color filter is arranged on the upper substrate glass, and the rotation direction of liquid crystal molecules is controlled by changing the signal and voltage on the TFT, so as to control whether the polarized light of each pixel points is emitted or not and achieve the display purpose.

led LCD screen is a display panel composed of a large number of light emitting diodes, which is equivalent to a small light emitting diode at each pixel point, compared with LCD, LED display screen is driven by low voltage scanning and has the characteristics of low power consumption, long service life, low cost, high brightness, few faults, large viewing angle, long visual distance, etc.

The LED display screen currently on the market is not a real LED display screen, to be precise, it is an LED Backlight Type liquid crystal display, the liquid crystal panel is still a traditional LCD display screen. In a sense, it is somewhat fraudulent! South Korea's Samsung company was once convicted by the British Advertising Association of violating the country's advertising law because its 'LEDTV' LCD TV was suspected of misleading consumers.

for LCD, the most important key is its LCD panel and backlight type, the LCD panel of the display on the market generally uses TFT panel, which is the same. The difference between led LCD screen and LCD display is that their backlight types are different: LED backlight and CCFL backlight (That is, fluorescent lamps), Respectively, diode and cold cathode lamp tube.

In general, LCD is a liquid crystal-driven display screen, while LED is a LED-driven display screen.


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