With the development of the times, LED display screens have become more and more widely used, and related products have become more and more. How to distinguish the quality of such large screens has become a thorny issue for many people. Today, Winbond Ying Optoelectronics editor will take Let's take a look together.
LED display
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The flatness of the surface of the display
This is the most intuitive factor, whether professional or non-professional customers can see it most intuitively with their eyes. The flatness of the surface of the display should be within ±1mm to ensure that the displayed image is not distorted, and local protrusions or recesses will cause a blind spot in the viewing angle of the LED display. At the same time, it is necessary to ensure that there is no gap between the module and the module during the installation process. Generally, the display screen below P3 needs to pay special attention to this problem during the assembly or installation process. If there is a gap between the module and the module, a black line will be seen during the playback of the screen.
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brightness
The brightness of the indoor full-color screen should be above 800cd/m2-1200cd/m2, and the current brightness of conventional lamp beads can reach this level. Of course, the brightness is mainly determined by the quality of the LED lamp chip. Generally speaking, the lamp beads of NationStar are the brightest, followed by Jingtai.
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White balance effect
The white balance effect is one of the important indicators of the display screen, and many non-professional sellers do not know this parameter very well.
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 bit different, there will be a deviation of white balance. Generally, pay attention to whether the white is blue or yellow. Green phenomenon. White balance is generally used to adjust the white balance by adjusting the color resistance before mass production.
Whether the white balance is done well or not has a lot to do with the craftsmanship level of the manufacturer.
LED display
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Color reproducibility
Color reproducibility refers to the reducibility of the display screen, which means that the color displayed on the display screen must be highly consistent with the color of the playback source, so as to ensure the realism of the image.
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Whether there are dead spots
Dead point refers to a single point that appears on the display screen that is always on or black. The number of dead points is mainly determined by the quality of the lamp beads. Generally, the problem of large quantities of dead lamps will not occur with the use of braided genuine lamps. There are also some dead lights because of virtual soldering during patching.
LED display
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Whether there is a color block
Color block refers to the obvious color difference between adjacent modules. The color transition is based on the module. The color block phenomenon is mainly caused by poor control system, low gray level, and low scanning frequency. The small-pitch LED display is more prominent on this issue.
