What is the grayscale and brightness level of the LED full-color display?

What is the grayscale and brightness discrimination level of the LED full-color display? The grayscale of the full-color LED display is what we usually call the color scale or grayscale, which refers to the degree of brightness. Grayscale is the determinant of the number of displayed colors. Generally speaking, the higher the grayscale, the richer the displayed colors and the finer the picture; the brightness discrimination level of the LED display refers to the image that the human eye can distinguish from the darkest to the whitest. between brightness levels.

The gray level of the LED full-color display mainly depends on the number of A/D conversion bits of the system. Of course, the video processing chip, memory and transmission system of the system must provide the support of the corresponding number of digits. At present, the domestic LED display mainly adopts an 8-bit processing system, that is, 256 (28) levels of gray. A simple understanding is that there are 256 brightness changes from black to white. Using RGB three primary colors can form 256×256×256=16777216 colors. That is commonly referred to as 16 trillion colors. The international brand display screen mainly adopts a 10-bit processing system, that is, 1024 gray levels, and the three primary colors of RGB can form 1.07 billion colors.

Although grayscale is the determining factor for the number of colors, it does not mean that the larger the limit, the better. Because the resolution of the human eye is limited, and the increase in the number of bits processed by the system will involve changes in system video processing, storage, transmission, scanning, etc., the cost will increase sharply, and the cost performance will decrease. Generally speaking, 8-bit systems can be used for civilian or commercial-grade products, and 10-bit systems can be used for broadcast-grade products.

Brightness discrimination level

The brightness discrimination level of the LED display screen refers to the brightness level of the image that the human eye can distinguish from the darkest to the whitest. As mentioned earlier, the gray scale of the display screen is very high, which can reach 256 or even 1024. However, due to the limited sensitivity of the human eye to brightness, these gray levels cannot be fully recognized. That is to say, many adjacent levels of grayscale may look the same to the human eye. And the ability of the eyes to distinguish is different for each person. For the display screen, the higher the level of human eye recognition, the better, because the displayed image is for people to see after all. The more brightness levels the human eye can distinguish, the greater the color space of the display, and the greater the potential for rich colors. The brightness discrimination level can be tested with special software. Generally, if the display screen can reach level 20 or above, it is considered a good level.

The above is about the meaning of the grayscale and brightness of the LED full-color display screen, and more about the technical parameters such as scanning method and dot spacing!

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