1.
The full color led display surface roughness should be within + 1mm,
to ensure that the display image does not distort. Partial convex or
concave can lead to blind visual angle of the display screen. The
flatness is mainly determined by the production technology.
2. Brightness and visual angle. Full color led display brightness need to be up to 800cd/m2 and outdoor display be up to 1500-10000cd/m2 to ensure that people could see clear and vivid images. The brightness is mainly determined by the LED chip, but too high brightness would shorten the lifetime of LEDs, so it’s not a must to improve the brightness excessively. Nowadays for indoor display require low brightness and high gray scale, generally brightness among 800-1000cd/m2, and gray scale 16bit. The visual angle of display decides the audience quantity, so the better visual angle, the better. The display visual angle is mainly determined by LED chip encapsulation method. So far, the SMD visual angle is up to 140°, compared with DIP, it has better visual effect.
2. Brightness and visual angle. Full color led display brightness need to be up to 800cd/m2 and outdoor display be up to 1500-10000cd/m2 to ensure that people could see clear and vivid images. The brightness is mainly determined by the LED chip, but too high brightness would shorten the lifetime of LEDs, so it’s not a must to improve the brightness excessively. Nowadays for indoor display require low brightness and high gray scale, generally brightness among 800-1000cd/m2, and gray scale 16bit. The visual angle of display decides the audience quantity, so the better visual angle, the better. The display visual angle is mainly determined by LED chip encapsulation method. So far, the SMD visual angle is up to 140°, compared with DIP, it has better visual effect.
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| P5 Indoor Led Display |
3. White balance effect, is one of the most important indicators of full color led display. In color science, when red, green, bule colors ratio reach 1:4.6:0.16, it shows pure white color. If the actual ratio exists deviation, white balance will appear deviation. Normally we need to pay attention if it exists partial blue or partial green-yellow appearances. White balance is mainly determined by the control system.
4. Color reductibility, it means the color reductibility of the images. The screen displaying color need to keep highly congruent with the play source color, to ensure the authenticity of the image.
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| P5 Indoor Led Display |
5. If there is mosaic and dead light. The mosaic means constant bright or black block in the display. It’s called led module necrosis. The main relevance is the display connector quality. The dead light refers constant bright or black point in the display screen. The quantities of dead light represent the quality of LED chip. TCB led display products have 72 hours aging test before shipment, eliminating dead light issue and show clients prefect products.
6. If there is color lump. It refers to the obvious color difference between adjacent modules,. Different batch of full color led display might exist tiny color difference.
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