1: flatness: LED display surface flatness to ± 1mm, to ensure that the displayed image is not distorted, locally raised or recessed corner leads to the viewing angle of the display appear. Car LED display smoothness of companies is mainly decided by the production process.
2: brightness and viewing angle: indoor full color led display brightness in 800-2000cd/m2 outdoor full color led display brightness in 5000-7500cd/m2, can guarantee the screen working, otherwise it will because the brightness is too low or too high the displayed image is not clear. Brightness is mainly decided by the LED chip Crystal size. Audience directly determines the size of the viewing angle display, hence the angle, the greater the better. Its size is determined primarily by core packages.
3: white balance effect: white balance effect is the most important indicator of display colors being red, green, and blue primaries appears to 1:4.6:0.16 the proportion of pure white, if the actual percentage point deviation deviation of white balance occurs, generally pay attention to white-blue, yellow and green. Car LED display manufacturer introduced the white balance is mainly decided by the display control system, core reduction also has effects on the color.
4: a colorless color: color refers to the color difference between adjacent modules there is a clear, color transitions in module units, poor color phenomenon is mainly caused by the control system, high levels of gray, scan caused by low frequency.
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