To judge the quality of LED display screens, a comprehensive evaluation can be made from the following aspects:
1. Flatness: The flatness of LED display screens should be kept within ±1mm. This is to ensure that the image is not distorted. If the screen surface is not flat, the image will appear dead angle when viewed from certain angles, affecting the visual effect.
2. Brightness and viewing angle: These are key indicators for evaluating the performance of LED display screens. The brightness of indoor LED display screens needs to be above 600nits, while that of outdoor LED display screens needs to reach above 4500nits. The higher the brightness, the better the display screen performs under strong light. The larger the viewing angle, the more consistent the image quality will be when viewing the screen from more angles, without obvious color and brightness changes.
3. White balance: White balance is an important parameter for the color accuracy of LED display screens. The ideal red, green and blue ratio is 1:4.6:0.16. If the ratio is inaccurate, it will cause color deviation of the screen display. White balance mainly depends on the quality of the control system and the die. Excellent white balance effect can accurately restore the color and provide a real visual experience.
4. Color reproduction ability: This is related to the quality of the tube core, the control system and the correction technology. A high-quality LED display should be able to truly restore various colors, and the display effect should be natural and realistic.
5. Whether there are mosaics and dead angles: These problems will seriously affect the display effect and service life. The mosaic phenomenon refers to the inconsistent display of some areas on the screen, forming a block pattern; the dead angle refers to the fact that some areas on the screen are completely not displayed.
6. The performance of the control system: The control system directly affects the grayscale and scanning frequency of the LED display. If the control system performance is poor, it will cause color block phenomenon, that is, the colors between adjacent modules are obviously different, which will affect the coherence and clarity of the overall image.
When purchasing an LED display, consumers need to consider its quality from the above multiple aspects. A high-quality LED display should not only perform well in brightness, color reproduction, and viewing angle, but also in flatness, white balance, and control system performance. Only through a comprehensive quality assessment can you choose a high-performance LED display that meets your needs.
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