How to evaluate the quality of LED display?
Author:Chen Meizhen Time:2021-10-13 17:59 Browse(881)
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How to evaluate the quality of LED display?

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2. If the brightness of indoor full-color screen is above 800cd / m2, and that of outdoor full-color screen is above 1500cd / m2, the display image will not be blurred because of the low brightness

3. The color of the display screen is consistent with that of the playback source

4. The surface flatness of LED display should be within ± 1 mm to avoid distortion of display image<

5. White balance effect is one of the most important indicators of the display screen.
in color science, when the ratio of red, green and blue is 1:4.6:0.16, it will show pure white.
if there is a little deviation in the actual ratio, there will be a deviation in white balance. Generally, it is necessary to pay attention to whether the white is blue, The yellow green phenomenon.
the quality of a full-color display can be judged from the following aspects:   
1.   planeness   
        The surface flatness of the display screen should be within ± 1 mm.
to ensure that the display image will not be distorted, and local convex or concave will lead to dead angle of the visual angle of the display screen.
the flatness is mainly determined by the production process.
the quality of the display screen is mainly determined by the production process  
  two   Brightness and viewing angle   
        The brightness of indoor full-color screen should be 800cd / m ² Above.
the brightness of outdoor full-color screen should be 1500   cd/m ² In order to ensure the normal operation of the display screen, otherwise the displayed image will not be seen clearly because of the low brightness.
the brightness is mainly determined by the quality of the LED chip.
the brightness of the LED chip is very low   
        The size of the viewing angle directly determines the audience of the display screen.
the size of the viewing angle directly determines the audience of the display screenSo the bigger the better.
the size of the viewing angle is mainly determined by the packaging method of the die.
the size of the viewing angle is mainly determined by the packaging method of the die   
3.   White balance effect   
        The white balance effect is one of the most important indicators of the display screen.
in color science, when the ratio of red, green and blue primary colors is 1:4.6:0.16, it will show pure white.
if there is a little deviation in the actual ratio, there will be a deviation in the white balance. Generally, we should pay attention to whether the white is blue, The white balance is mainly determined by the control system of the display screen.
the chip also has an effect on the color reduction.

4   The reducibility of color   
        Color reducibility refers to the reducibility of the display screen to the color.
the color displayed on the display screen should be highly consistent with the color of the playback source, so as to ensure the authenticity of the image.
the color of the display screen should be highly consistent with the color of the playback source   
5.   Is there mosaic or dead point   
        Mosaic refers to the small square that is always bright or black on the display screen.
the main reason is that the quality of the connector used in the display screen is not up to standard      six   Is there a color block   
        Color block refers to the obvious color difference between adjacent modules.
the color transition is based on modules, which is mainly caused by poor control system, low gray level and low scanning frequency
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