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fall of LED screen

Editor this paragraph how to evaluate the stand or fall of LED screen
A full color display is mainly from the following aspects to sign:
The display surface roughness in +1mm within, to ensure that the display image is distorted, LED Lighting modulelocally convex or concave can lead to visual angle of display dead angle. Flatness is mainly decided by the production process.

The 2luminance and viewing angle
Indoor full color screen brightness in the 800cd / m² above, outdoor full-color screen brightness in 1500CD / m² above, can guarantee the normal work of display, or because the brightness is too low to see the displayed image. The size of the brightness is mainly composed of LED tube core quality decision.
The visual angle of the display screen directly determines the audience much, so the better. Visual angle is mainly composed of a tube core package to decide.
3white balance effect
White balance effect is one of the most important indicators screen. Study of color are three primary colors in the ratio of 1:4.6:0.16will show the pure white, if the actual percentage of a little deviation appears white balance deviation, the general should pay attention to whether there is a bluish white, yellowish green phenomenon. White balance is mainly composed of a display screen control system to decide, the tube core for color reduction also have effect.
4color reduction
Color reduction refers to the display of color reduction, both display color and playback source color maintain height to agree, so as to ensure the image realistic.
5there is no mosaic, dead phenomenon
Mosaic is a display of Chang Liang or the normally black small box, both module necrosis,Bluetooth keyboard device the main reason for the display of the connector quality.
Dead refers to display Chang Liang or normally black single point, dead number is mainly composed of a tube core decide.
6 has no color
Color refers to the adjacent module exists between the more obvious color difference, color transition in modular units, causing color phenomenon is mainly composed of a control system is poor, gray level is not high, low frequency caused by scanning.