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. However, large outdoor LED display screens have 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. At present, the combined pixel method and the flat pixel method are common memory combination methods. Among them, the bit plane method has more obvious advantages, which effectively improves the best display effect of the LED screen. The circuit is reconstructed by bit plane data, RGB data is converted, different pixels in the same weight bit are organically combined, and adjacent storage structures are used for data storage.
