With the advancement of social science and technology and the development of outdoor advertising, people have higher and higher requirements for display
screens. A good display screen not only involves the improvement of the quality of life, but also whether the advertising effect is effectively spread. So how to choose a high-quality LED large screen has become a problem that many buyers need to consider. Next, the electronics analyzes this problem from the following key factors: 1. Flatness The flatness of the surface of the LED display should be within 0≤a≤1mm to ensure that the displayed image is not distorted, and local protrusions or recesses will cause There is a blind spot in the viewing angle of the display. The quality of the flatness is mainly determined by three aspects: ①the production process and materials; ②the construction of the on-site steel project; ③the quality of the installation and construction of the display installation team. 2. Brightness and viewing angle The brightness of the indoor full-color LED display must be above 800cd/m2, and the brightness of the outdoor full-color LED display must be above 5500 cd/m2 to ensure the normal display of the LED display, otherwise it will be due to the brightness It is too low to see the displayed image clearly. The level of brightness is mainly determined by the quality of the LED die. The size of the viewing angle directly determines the size of the viewing area of u200bu200bthe LED display, so the larger the better. The size of the viewing angle is mainly determined by the LED chip. 3. White balance effect The white balance effect is one of the most important indicators of the LED display. In color science, pure white will be displayed when the ratio of the three primary colors of red, green and blue is 1:4.6:0.16. If the actual ratio is a little different, the white balance will be deviated. Generally, pay attention to whether the white is blue or yellow. Green phenomenon. The quality of the white balance is mainly determined by the LED chip, and the LED chip also has an impact on the color reproduction. 4. Color reproducibility Color reproducibility refers to the color reducibility of the LED display, that is, the color displayed by the LED display must be highly consistent with the color of the playback source, so as to ensure the realism of the image. 5. Whether there is mosaic or dead spots. Mosaic refers to the small four squares that are always bright or black on the touch display. It is the phenomenon of module necrosis. The main reasons are: ①The quality of the connectors used in the LED display is not good enough. There are protrusions or depressions; ②LED lights are not aligned; ③The sealing glue process is unqualified. Dead point refers to a single point that is often black on the LED display. The number of dead points is mainly determined by the quality of the LED chip. 6. With or without color block Color block refers to the lack of color in a small area; the main reason is the control IC and power supply, and the quality of the control circuit cable. 7. Display appearance Display appearance: It is the most intuitive and original to the product The quality is good or bad to make the most preliminary evaluation. The appearance quality can reflect the quality of the manufacturer's production technology and materials.
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