LED Display Brightness Adjustment

Regardless of whether LEDs are used to make monochromatic, two-color or three-color screens, the brightness of each LED constituting the pixel must be adjustable to display an image. The fineness of the adjustment is the gray level of the display screen. The higher the gray level, the more delicate the displayed image, the richer the color, and the more complex the corresponding display control system.

Generally, the color transition of 256-level grayscale image is very soft, while for 16-level grayscale color image, the color transition boundary is very obvious. Therefore, color LED displays are currently required to be made of 256 to 4096 gray levels.