Acceptance standard for outdoor full-color LED display screen

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Acceptance standard for outdoor full-color LED display screen
LED display screen is one of our common large screens, and LED electronic screen is the most promising display screen in the future. Since 2008, LED screens have shown many functions and effects in just a few years. Nowadays, whether outdoors or indoors, LED display has been recognized by people. For the production of LED display screen, as a customer, how should we formulate the acceptance standard of display screen?
The acceptance of outdoor display screen generally starts from six aspects: color reduction, color block color difference, mosaic phenomenon, brightness and viewing angle, and white balance effect.

1, LED display color reproduction refers to the color reproduction of the display screen, that is, the color displayed on the display screen should be highly consistent with the color of the broadcast source to ensure the realism of the image.

2. The colorless color block of LED display screen means that there is obvious color difference between adjacent modules, and the color transition is based on modules. The color block phenomenon is mainly caused by poor control system, low gray level and low scanning frequency.

3. Does the LED display screen have mosaics? Dead-spot mosaics indicate the small squares on the display screen, which are always bright or black. It is not only the phenomenon of module necrosis, but also the quality of connectors used in the display screen is not up to standard. Dead spots refer to a single point that is always bright or black on the LED display screen, and the number of dead spots is mainly determined by the quality of the die.

4, flatness The surface flatness of the LED display screen should be within 1 mm to ensure that the displayed image is not distorted. Local protrusions or depressions will lead to dead angles in the viewing angle of the display screen. The flatness is mainly determined by the production process.

5. The brightness of LED display screen and viewing angle of indoor full-color screen should be above 800cd/m2, and the brightness of outdoor full-color screen should be above 1500cd/m2 to ensure the normal operation of the display screen, otherwise the displayed image will not be clear because of low brightness. Brightness is mainly determined by the LED die. The viewing angle directly determines the audience of the display screen, so the bigger the better. The viewing angle is mainly determined by the packaging mode of the die.

White balance effect of LED display screen White balance effect is one of the most important indicators of display screen. In color science, only when the ratio of red, green and blue is 1:4.6:0.16 will pure white be displayed. If the actual proportion is slightly deviated, the white balance will be deviated. Generally pay attention to whether white is blue or yellow-green. The white balance is mainly determined by the control system of the display screen, and the die also has an influence on the color reproduction degree.

The above six points are the basic acceptance points of LED display screen and the most direct and comprehensive acceptance direction. Every suitable LED display screen must go through design, production and aging test before it is put into market.

led display,lcd screen,display screen

Rui Guan