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What kind of LED full-color screen can meet indoor and outdoor needs?

  • 作者：
  • 2024-05-27 08:29:28
LED displays are the most widely used and eye-catching advertising carrier in outdoor media. Today, with the rapid development of science and technology, LED electronic displays have been widely used in various fields such as government, military, education, finance, industry and commerce, postal services, securities, transportation, sports, communications, and power.
To purchase a high-quality LED display, you need to understand the following aspects:
  1. Brightness and viewing angle: The brightness of indoor full-color LED displays must be above 600cd/m2, the brightness of outdoor full-color LED displays must be above 6000cd/m2, and the brightness of outdoor LED strips must be above 2000cd/m2. Only in order to ensure the normal brightness requirements of the LED display, otherwise the content displayed will not be visible clearly 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 audience of the LED display, so the larger the better. The size of the viewing angle is mainly determined by the packaging method of the die.
  2. Flatness: The surface flatness of the LED display should be within 1mm to ensure that the displayed image is not distorted. Local protrusions or depressions will cause dead spots in the viewing angle of the LED display. The flatness is mainly determined by the production process.
  3. Color restoration: Color restoration refers to the restoration of color by the LED display, that is, the color displayed on the LED display must be highly consistent with the color of the playback source, so as to ensure the authenticity of the image.
  4. White balance effect: White balance effect is one of the most important indicators of LED displays. In color science, pure white will be displayed only when the ratio of the three primary colors of red, green and blue is 3:6:1. If there is a slight deviation in the actual ratio, there will be a deviation in white balance. Generally, attention should be paid to whether the white is bluish or yellow-green phenomenon. The quality of white balance is mainly determined by the control system of the LED display, and the die also has an impact on color restoration.
  5. Whether there is color block: Color block refers to the obvious color difference between adjacent LED modules. 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.
  6. Whether there is mosaic or dead point phenomenon: Mosaic refers to the small four squares that appear on the LED display screen that are always bright or black, that is, module necrosis. The main reason is that the quality of the connectors used in the LED display screen is not good. Dead spots refer to a single spot that appears on the LED display that is always bright or black. The number of dead spots is mainly determined by the quality of the die.
  7. Gray level: Gray level is the technical processing level of an LED display from the darkest to the brightest. The higher the gray level, the richer the color and more gorgeous the color; the more delicate the picture is, and it is easier to express rich details. At present, domestic LED displays mainly use 8-bit processing systems, that is, 256 (28)-level gray levels. A simple understanding is that there are 256 brightness changes from black to white. Using three primary colors of RGB can form 256 256 256=16777216 colors. This is what is commonly known as 16 megabytes of color. The international brand Lianchengfa LED display mainly uses a 10-bit processing system, that is, 1024 gray levels, and the three primary colors of RGB can form 1.07 billion colors. Although gray scale is the decisive factor in determining the number of colors, it does not mean that the unlimited, the larger, the better. Because first of all, the resolution of the human eye is limited, and secondly, the increase in the number of processing bits in the system will involve changes in various aspects such as the system's Media Processing Service, storage, transmission, and scanning, the cost has increased sharply, and the cost performance has declined. Generally speaking, civil or commercial products can adopt 8-bit systems, and broadcast-grade products can adopt 10-bit systems.
  8. Refresh frequency: Refresh frequency refers to the number of times the LED display is repeatedly displayed by the display. In theory, the higher the refresh frequency, the better the display effect. Generally speaking, the indoor LED display refresh frequency in civil or commercial LED display series products is greater than 1920HZ, and the outdoor LED display refresh frequency is greater than 3840HZ.

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