LED Display Pixel Brightness
Dec 03, 2020
The controller is used to control the light emission of the pixel to promote its drive independence. When a color video needs to be presented, the brightness and color of each pixel must be effectively controlled, and the scanning operation must be completed synchronously within a specified time. But the large-scale LED electronic display screen has thousands of pixels, which increases the complexity of control and the difficulty of data transmission. However, it is unrealistic to use D/A to control each pixel in actual work. At this time, a brand-new control scheme is needed to meet the complex requirements of the pixel system.
Based on the analysis of visual principles, the brightness/off ratio of pixels is the main basis for people to analyze the average brightness, and effective adjustment of this ratio can achieve effective control of pixel brightness. When this principle is applied in the LED electronic display screen, the digital signal can be converted to the time signal to realize the effective conversion between D/A.
