Each part is very important for company to produce a good-quality LED screen, such as professional development and design, raw material selection, strict production management, aging test and so on. How can people buy a good-quality LED screen by details?
1. Flatness. The surface flatness of the LED display should be within 1mm to ensure that the displayed image is not distorted. A bulge or dent will affect viewing angle of the display. The quality of flatness is mainly determined by the production process.
2. Brightness and viewing angle. To ensure the normal operation of the display, the brightness of the indoor full color screen should be above 800cd/m2, and the outdoor full color screen should be above 1500cd/m2, otherwise it will be difficult to see the image or video clearly because the brightness is too low. The brightness is mainly determined by the quality of the LED chip. The viewing angle directly determines the number of display audiences, so the larger the better.
3. White balance effect. White balance effect is one of the most important factors for the LED display. In color science, pure white will be displayed when the ratio of the three primary colors (red, green, and blue) is 1: 4.6: 0.16. If there is a deviation of the actual ratio, the white balance will be changed accordingly. Generally, people should pay attention to whether the color is slant yellow, green or bluish. The white balance is of the LED screen mainly influenced by the control system of the display screen.
4. Color reproduction. The color on the display screen must be highly consistent with the color of the playback source, so as to ensure the authenticity of the image.
5. No mosaic or dead lamp phenomenon. Mosaic refers to the small four squares that are always bright or black on the display screen. It is a module necrosis phenomenon. The main reason is that the quality of the connector used in the display is not good.
When purchasing LED display screens, the above five points can help you to judge the quality of the product, but even the quality is up to standard, it is also necessary to choose the supplier with good after-sales service.