What is a LED display?
Author:Chen Jing Time:2021-06-08 16:48 Browse(288)
In the PN junction of some semiconductor materials, when the injected minority carrier is combined with the majority carrier, the excess energy will be released in the form of light, thus the electric energy can be directly converted into light energy. When the reverse voltage is applied to the PN junction, it is difficult to inject a few carriers, so it does not emit light. The use of injection electroluminescence principle of the production of LED called light-emitting diode, commonly known as LED. LED light emitting diode(
In some semiconductor PN junctions, when the injected minority carriers are combined with the majority carriers, the excess energy will be released in the form of light, so that the electric energy can be directly converted into light energy.
it is difficult to inject the minority carriers in PN junctions with reverse voltage, So it doesn't emit light.
this kind of diode made by injection electroluminescence principle is called light emitting diode.

What is a LED display?

it is generally called led.
the abbreviation of light emitting diode (LED). The luminous color and luminous efficiency of LED are related to the material and process of making LED.
at present, red, green, light emitting diode are widely used Blue three kinds.
because the working voltage of LED is low (only 1.5-3V).
it can actively emit light and has a certain brightness, and the brightness can be adjusted by voltage (or current), and it is shock resistant, vibration resistant and has a long service life (100000 hours), so in large-scale display equipment, At present, there is no other display mode that can match the LED display mode.
the display screen made by putting red and green LED together as a pixel is called double primary color screen or pseudo color LED panel; The display screen with red, green and blue LED tubes as one pixel is called three primary color screen or all color LED panel.
the pixel size of indoor LED screen is generally 2-10 mm.
several kinds of LED chips that can produce different primary colors are often packaged into one. The pixel size of outdoor LED screen is mostly 12-26 mm, and each pixel is composed of several monochrome LEDs, The common finished product is called pixel tube or pixel module.
if you want to display an image on the LED display screen.
if you want to display an image on the LED display screenThe brightness of each LED that constitutes the pixel must be adjustable, and the fine degree of adjustment is the gray level of the display screen.
the higher the gray level is,
the more delicate the image is, the richer the color is, and the more complex the corresponding display control system is.
at the current technical level,
the color transition of 256 level gray image is very soft, The effect of image restoration is quite satisfactory.
life is happy...
monitor.
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