LED full color display gray level and principle application

The grayscale of the LED full-color screen is also the color level, which refers to the degree of brightness and darkness, and is the determinant of the number of colors displayed. Generally, the higher the grayscale, the richer the color of the display screen, the more delicate the screen, and the easier it is to express rich details.

The gray level of the full-color LED display mainly depends on the number of A/D conversion bits of the system. The improvement of the number of bits processed by the system will involve changes in various links such as system video processing, storage, transmission, and scanning. At present, Lianchengfa LED display mainly adopts the following four processing systems, which form four different gray levels:

1. 8-bit processing system, that is, 256 (2 to the 8th power) grayscale. There are 256 brightness variations from black to white. Using RGB three primary colors can form 256×256×256=16777216 colors, that is, 16 trillion colors.

2. 10-bit processing system, that is, 1024 (2 to the 10th power) grayscale. There are 1024 brightness variations from black to white.

3. 12-bit processing system, that is, 4096 (2 to the 12th power) grayscale. There are 4096 brightness variations from black to white.

4. 14-bit processing system, that is, 16384 (2 to the 14th power) grayscale. There are 16384 brightness changes from black to white.

The gray level is not as high as possible, because the resolution of the human eye is limited, and the increase in the number of bits processed by the system will also increase the requirements for system video processing, storage, transmission, scanning, etc., resulting in overall costs. Costs go up, cost-effectiveness goes down

At present, outdoor LED full-color screens generally use 8-bit processing systems, and a few use 10-bit processing systems. As for higher commercial or broadcast grade products using 12-bit systems or even higher.