What is the difference between LED screen and LCD screen?
Author:Wu Yue Time:2021-06-08 08:02 Browse(677)
In fact, the so-called led liquid crystal display is not an accurate name. It is just the abbreviation added by the media and netizens for convenience. Its full name should be LED backlight LCD. According to the principle of liquid crystal display, liquid crystal display shows different colors by the light of backlight refracted by liquid crystal molecules. Liquid crystal molecules cannot emit light by themselves, which is mainly achieved by the illumination of backlight. At present, the backlight of most LCD is CCFL (cold cathode ray tube), its principle is similar to our fluorescent tube. And LED backlight is used to replace/
As a matter of fact, the so-called led liquid crystal display is not an accurate name, it is just the abbreviation added by the media and netizens for convenience.

What is the difference between LED screen and LCD screen?

its full name should be LED backlight liquid crystal display.
according to the principle of liquid crystal display.
liquid crystal display displays different colors by liquid crystal molecules refracting the light of backlight, Liquid crystal molecules can't emit light by themselves, which is mainly realized by the illumination of backlight.
at present.
the backlight of most liquid crystal displays is CCFL (that is, we often say cold cathode ray tube), and its principle is similar to our fluorescent tubes.
LED backlight is a new backlight used to replace CCFL.
in this paper, the principle of CCFL is introducedSince it is the replacement of CCFL backlight.
what is the advantage of LED backlight over CCFL backlight? The first is more uniform lighting.
because the CCFL backlight tubes are usually strip or U-shaped.
it is easy to cause the problem of uneven lighting. However, due to the different principles of LED backlight, the distribution of the light-emitting body is uniform, so there is no need to worry about the problem of uneven lightingSecondly,
the service life is longer.
the service life of ordinary CCFL backlight is 50000 hours.
while the service life of LED is more than 100000 hours.
therefore, the brightness attenuation of LCD or LCD TV with LED backlight is better than that of CCFL backlightThirdly,
environmental protection is better.
using CCFL backlight can never solve the problem of mercury, which is determined by its luminous principle.
take a look at our daily white light tubesThe fluorescent tubes we use on weekdays all contain mercury.
CCFL backlight, which is similar to the principle of fluorescent tubes, can not solve this problem.
however,
LED does not have this problem.
there is another point.
LED backlight displays are more energy-saving than CCFL backlight displays. Take 21.6-inch displays as an example, The power consumption of LED backlight LCD is about 60% of CCFL backlight
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