Flatness
The surface flatness of the display should be within ±1mm to ensure that the displayed image is not distorted. Local protrusion or recession will cause the viewing angle of the display to appear dead angle. The quality of the flatness is mainly determined by the production process.
2. Brightness and viewing angle
The brightness of the indoor full-color screen should be above 800cd/m2, and the brightness of the outdoor full-color screen should be above 1500cd/m2 to ensure the normal operation of the display. Otherwise, the displayed image will not be visible because the brightness is too low. The brightness is mainly determined by the quality of the LED die.
The size of the viewing angle directly determines the number of display audiences, so the bigger the better. The size of the viewing angle is primarily determined by the way the die is packaged.
3. White balance effect
The white balance effect is one of the most important indicators of the display. In color theory, when the ratio of red, green and blue primary colors is 1:4.6:0.16, pure white will be displayed. If there is a slight deviation in the actual ratio, the white balance will be biased. Generally, it should be noted whether white is blue or not. Yellow-green phenomenon. The quality of the white balance is mainly determined by the control system of the display, and the die also has an effect on the color reproduction.
4. Color reduction
The reproducibility of color refers to the reducibility of the display, and the color displayed on the display should be consistent with the color of the source to ensure the realism of the image.
5. Whether there is mosaic or dead point
Mosaic refers to the always-on or normally black small four-squares on the display screen. The module is necrotic. The main reason is that the quality of the connector used in the display is not closed.
The dead point refers to a single point that is always bright or often black on the display screen. The number of dead points is mainly determined by the quality of the die.
6. There are no color blocks
The color block means that there is a significant color difference between adjacent modules, and the color transition is in units of modules. The phenomenon of causing the color block is mainly caused by poor control system, low gray level and low scanning frequency.
The surface flatness of the display should be within ±1mm to ensure that the displayed image is not distorted. Local protrusion or recession will cause the viewing angle of the display to appear dead angle. The quality of the flatness is mainly determined by the production process.
2. Brightness and viewing angle
The brightness of the indoor full-color screen should be above 800cd/m2, and the brightness of the outdoor full-color screen should be above 1500cd/m2 to ensure the normal operation of the display. Otherwise, the displayed image will not be visible because the brightness is too low. The brightness is mainly determined by the quality of the LED die.
The size of the viewing angle directly determines the number of display audiences, so the bigger the better. The size of the viewing angle is primarily determined by the way the die is packaged.
3. White balance effect
The white balance effect is one of the most important indicators of the display. In color theory, when the ratio of red, green and blue primary colors is 1:4.6:0.16, pure white will be displayed. If there is a slight deviation in the actual ratio, the white balance will be biased. Generally, it should be noted whether white is blue or not. Yellow-green phenomenon. The quality of the white balance is mainly determined by the control system of the display, and the die also has an effect on the color reproduction.
4. Color reduction
The reproducibility of color refers to the reducibility of the display, and the color displayed on the display should be consistent with the color of the source to ensure the realism of the image.
5. Whether there is mosaic or dead point
Mosaic refers to the always-on or normally black small four-squares on the display screen. The module is necrotic. The main reason is that the quality of the connector used in the display is not closed.
The dead point refers to a single point that is always bright or often black on the display screen. The number of dead points is mainly determined by the quality of the die.
6. There are no color blocks
The color block means that there is a significant color difference between adjacent modules, and the color transition is in units of modules. The phenomenon of causing the color block is mainly caused by poor control system, low gray level and low scanning frequency.
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