1: Flatness: The surface smoothness of LED display should be within the ±1mm, to ensure that the display image does not distort, local convex or concave will lead to the visual angle of the display corner. Car LED display manufacturers to introduce the smoothness of the quality is mainly determined by the production process.
2: Brightness and visual angle: the brightness of the indoor full color to be in the 800-2000cd/m2, outdoor full color color to be in the 5000-7500cd/m2, in order to ensure that the display of the normal work, or because the brightness is too low or too highly overrated image displayed. The size of the brightness is mainly determined by the size of the LED tube core Crystal. The size of the visual angle directly determines the number of the display audience, so the greater the angle the better. And its size is mainly determined by the encapsulation method of the Tube core.
3: White balance Effect: white balance effect is one of the most important indicators of display, color learning is red green blue three primary colors of the proportion of 1:4.6:0.16 will show the pure white, if the actual proportion of a little deviation will appear white balance deviation, generally should pay attention to whether white is biased blue, yellow green phenomenon. Car LED display manufacturers introduced the white balance of the good or bad mainly has the display control system to decide, the tube core to the color reduction also has the influence.
4: There is a colorless block color difference: color block refers to the adjacent modules between the obvious color difference, the transition to the module as a unit, causing color block is mainly caused by poor control system, gray level is not high, scanning frequency is low.
5: The reduction of color: color reduction refers to the display of color reduction, both the display color and playback source color to maintain a high degree of consistency, so as to ensure the real sense of the image.
6: There is no mosaic, dead point phenomenon: Mosaic refers to the display of the Unit module color uneven effect, steady or often black small four blocks, that is, modular necrosis phenomenon, the main reason for the display of the connector quality is not clearance. Dead point refers to the display on the screen steady or often black single points, the dead center of the number is mainly determined by the quality of the tube core.