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The quality identification of full-color LED display
A full-color display is mainly from the following aspects to sign:
Display the surface roughness should be within + 1mm, to ensure that the display image does not distort, local convex or concave into the screen can lead to the visual angle of the screen. The flatness is mainly determined by the production process.
2 brightness and visual angle
Indoor full color brightness above 800cd/m L, outdoor full color brightness to above 1500cd/m it, in order to ensure that the display of normal work, otherwise it will because the brightness is too low and can not see the display of the image. The size of the brightness is mainly determined by the LED tube core.
Visual angle of the size of the direct decision of the number of display screen, so the greater the better. The size of the visual angle is mainly determined by the packaging mode of the pipe core.
3 white balance effect
White balance effect is one of the most important indicators of the display. To pay attention to whether the white bluish and yellowish green color on 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 white balance deviation. White balance is mainly determined by the control system of the display screen, the core of the color of the reduction of the impact.
4 color reduction
The reduction of color refers to the color of the display screen, both the color of the display and the color of the source to maintain a high degree of consistency, so as to ensure the authenticity of the image.
5 there is no mosaic, dead phenomenon
Mosaic is a appears on the display lamp or black four square, both module necrosis phenomenon, the main reason for the display of the connector quality doesn't pass.
The dead point refers to a single point on the screen appear often bright or often black, the number of dead is mainly composed of a pipe core is determined.
6 there is no color
A patch is a obvious difference exists 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 low