1: Flatness: LED display surface roughness should be within + 1mm, in order to ensure that the display image does not distort, local convex or concave into the visual angle of the screen will lead to the emergence of dead angle. LED display manufacturers to introduce the flatness of the production process is mainly determined by the production process.
2：亮度及可視角度：室內全彩屏的亮度要在800—2000cd/m2,室外全彩屏的亮度要在5000—7500cd/m2,才能保證顯示屏的正常工作，否則會因為亮度太低或太高看不清所顯示的圖像。亮度的大小主要由LED管芯晶體尺寸大小來決定?？梢暯嵌鹊拇笮≈苯記Q定顯示屏受眾的多少，故而角度越大越好。而其大小主要由管芯的封裝方式來決定。
2: brightness and visual angle: indoor full color brightness to the 800 - 2000 CD / m2, outdoor full color brightness to in the normal work of the 5000 - 7500cd/m2. In order to ensure that the display, otherwise it will because the brightness is too low or too high to see not clear as shown in the image. The size of the brightness is mainly determined by the size of the LED tube core. The size of the visual angle directly determines the number of the audience, therefore, the larger the angle, the better. And its size is mainly determined by the tube core package.
3：白平衡效果：白平衡效果是顯示屏最重要的指標之一，色彩學上當紅綠藍三原色的比例為1：4.6：0.16時才會顯示出純正的白色，如果實際比例有一點偏差則會出現白平衡的偏差，一般要注意白色是否有偏藍色，偏黃綠色現象。車載LED顯示屏廠家介紹白平衡的好壞主要有顯示屏的控制系統來決定，管芯對色彩的還原性也有影響。
3: white balance: white balance is the most important indicator of the display, color science popular green, blue three primary colors of the proportion of 1:4.6:0.16 will show out of pure white, if the proportion of the actual deviation will appear the deviation of the white balance, to pay attention to whether the white bluish and yellowish green. Car LED display manufacturers to introduce white balance is good or bad there is a display control system to decide, the core of the color of the reduction of the impact.
4：有無色塊色差：色塊是指相鄰模組之間存在較明顯的色差，顏色的過渡以模塊為單位了，引起色塊現象主要是由控制系統較差，灰度等級不高，掃描頻率較低造成的。
4: there is no color color: color is that there is obvious difference between adjacent module, the transition of color to module for the unit, causing color phenomenon is mainly caused by the control system is poor, the gray level is not high, scanning frequency lower.
5：色彩的還原性：色彩的還原性是指顯示屏對色彩的還原性，既顯示屏顯示的色彩要與播放源的色彩保持高度一致，這樣才能保證圖像的真實感。
5: the reduction of color: the reduction of color is the color of the display screen to restore the color, both the color of the display and the source of color to maintain a high degree of consistency, so as to ensure the authenticity of the image.
6：有無馬賽克、死點現象：馬賽克是指顯示屏上出現單元模組的顏色不均勻是的效果，常亮或常黑的小四方塊，既模組壞死現象，其主要原因為顯示屏所采用的接插件質量不過關。死點指顯示屏上出現的常亮或常黑的單個點，死點的多少主要由管芯的好壞來決定。
6: mosaic, dead phenomenon: mosaic is that appears on the display module of uneven color is the effect, often bright or black four square, both module necrosis phenomenon, the main reason for the display of the connector quality does not pass. The dead point refers to the single point screen appears often bright or often black, the number of dead is mainly composed of a pipe core is determined.
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