How to set LED electronic display screen as LED rolling screen
Author:Qiu Hui Time:2021-09-13 10:18 Browse(944)
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1. Generally, the life of LED is very long, and manufacturers usually mark it as more than 100000 hours. In fact, we should also pay attention to the brightness decay cycle of LED, for example, most of the ur red tubes used in automobile tail lamps are lit for more than ten to dozens of hours, The brightness is only half of the original.

How to set LED electronic display screen as LED rolling screen

the brightness decay cycle has a lot to do with the material technology of LED production.
generally, if economic conditions permit, four element led with slow brightness decay should be selected.
color matching and white balance:
2 white is the mixture of red, green and blue according to the brightness ratio.
when the brightness of green is 69%, the brightness of red is 21%, When the brightness of blue is 10%, the human eye will feel pure white after color mixing.
however, the chromaticity coordinates of red, green and blue of LED can not achieve the full chromatographic effect due to the process and other reasons.
to control the brightness of primary colors including those with deviation to get white light is called color matching.

3 before color matching for full-color LED display.
in order to achieve the best brightness and the lowest cost, We should try our best to choose the LED device with three primary colors whose luminous intensity is approximately 3:6:1 to form the pixel.
white balance requires that the three primary colors still synthesize pure white under the same gray value.

4 primary colors refer to the basic colors that can synthesize various colors.
the primary colors in the color light are red, green and blue.
the following figure shows the spectrum table, The three vertices in the table are the ideal wavelengths of primary colors.
if the primary colors are deviated.
then the area where colors can be synthesized will be reduced, and the triangle in the spectrum table will be reduced. From the visual point of view, colors will not only deviate, but also the richness will be reduced.

5 the red, green and blue light lines emitted by LEDs can be roughly divided into purplish red, pure red, orange red, orange, orange yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow, yellow Yellow green, pure green, emerald green, blue-green, pure blue, blue purple, etc.
the color of green is yellow green, pure green, emerald green, blue green, pure blue, blue purple, etcOrange red, yellow green and blue purple are much cheaper than pure red, pure green and pure blue.
among the three primary colors, green is the most important.
because green occupies 69% of the brightness of white, and is in the center of the color horizontal arrangement table.
therefore, when weighing the relationship between the purity of color and the price.
green is the most important consideration.
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in this paper, the relationship between the purity of color and the price is analyzed
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