How to Make Quality Check of Led Display

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Author : LISN LED
Update time : 2023-09-20 16:09:09

After you buy a led display, as a customer, how to make quality check for the display?

Quality check of outdoor display, generally from six aspects, color reproduction, color block or color difference, mosaic and dead leds, brightness and viewing angle, white balance effect.

1. The Color Reproduction

The color reproduction refers to the display of color reproduction, that is, the color of the display should be highly consistent with the color of the broadcast source, so as to ensure the realism of the image.

2. No Color Block

Color block refers to the existence of more obvious color differences between adjacent modules,. Color transition to the module as a unit, causing the phenomenon of color blocking is mainly caused by poor control system, gray level is not high, low scanning frequency.


3. No Mosaic and Dead Bulbs

Mosaic refers to the display of often bright or often black small quadrilateral block, both module necrosis phenomenon, the main reason for the display of the connector quality is not pass. Dead point is the LED display on the appearance of often bright or often black single point, dead point of how much is mainly by the core of the good and bad to decide.

4. Flatness

LED display surface flatness should be within ± 1mm to ensure that the display image is not distorted. Localized convex or concave will lead to the display of the visual angle of the dead center. Good or bad flatness is mainly determined by the production process.

5. Brightness and Viewing Angle

Indoor full-color screen brightness to be more than 600cd/m2, outdoor full-color screen brightness to be more than 4000cd/m2, in order to ensure that the normal work of the display, otherwise it will be too low because of the brightness to see the image displayed. The size of the brightness is mainly determined by the LED tube core. The size of the viewing angle is directly determined by the size of the display audience, so the bigger the better. The size of the visual angle is mainly by the core of the package to decide.

5. White Balance Effect

White balance effect is one of the most important indicators of the display. Color science when the ratio of red, green and blue three primary colors for 1:4.6:0.16 will show a pure white, if the actual proportion of a little deviation will appear in the white balance deviation, generally pay attention to the white whether there is a bias blue, yellowish green phenomenon. The white balance is mainly determined by the control system of the display, and the tube core also has an impact on the color reproduction.

The above 6 points are the basic acceptance points, but also the most direct and comprehensive acceptance direction. Each suitable LED display must be designed, produced and tested for aging before it can be put on the market.

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