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Difference between LCD screen and LED screen

2020-09-22 18:21

LCD is the serious scientific name of liquid crystal display, not the LED display that we often say. It is the abbreviation of Liquid Crystal Display in English. In terms of structure, it is to place a liquid crystal cell between two parallel glass substrates, and place a thin film transistor on the glass of the lower substrate. Color filters are set on the upper base glass plate. Then, the rotation direction of the liquid crystal molecules is controlled by the signal and voltage changes on the thin film transistor, so as to realize the control of each pixel.

LED is the abbreviation of English Light Emitting Diode, translated into Chinese is light-emitting diode. It is a solid-state semiconductor device that can convert electrical energy into visible light, which can directly convert electricity into light; for LEDs, it has low power consumption, long service life, low cost, high brightness, less failure, and large viewing angle. , Long visual distance and other characteristics, therefore, unlike LCD technology, its application is also more extensive, including lighting, outdoor large-screen display, as well as small subtitles and so on.

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