"旋转式LED点阵显示屏设计与实现——基于51单片机控制的创新应用"

The design and implementation of a rotation LED dot matrix display screen based on the 51 MCU is the focus of this thesis. The display screen utilizes the principle of visual persistence and is controlled by a 51 MCU as its core controller. The LED modules are mounted on a stable rotating platform, with the LEDs evenly spaced in each column when stationary. As the display module rotates at increasing speeds and eventually stabilizes, with precise control from the program, the human eye can perceive the preset text and characters due to the visual persistence effect. The function of the infrared receiver-transmitter diodes is to trigger a signal exchange when the receiving diode aligns with the transmitting diode as the display screen rotates, causing an external interrupt in the MCU control program. Since the control circuit mounted on the motor is constantly rotating at high speed, it is inconvenient to use a brush power supply method to power the control system and display modules. Therefore, a wireless coupling power transmission method through high-frequency coil coupling (equivalent to the primary coil coupling of a transformer) is adopted. The secondary coil coupling results in AC power, which needs to be rectified into DC power for use by the rotating modules. Keywords: visual persistence, DC motor, wireless coupling power transmission, infrared trigger. This design demonstrates the application of visual persistence in creating a rotating LED display screen using the 51 MCU as the controller. The use of wireless power transmission through coil coupling ensures a reliable power supply for the rotating modules. The incorporation of the infrared receiver-transmitter diodes enables seamless communication between the rotating display screen and the MCU control program. This thesis presents a novel approach to designing and implementing a rotation LED dot matrix display screen, offering a unique and interactive visual display experience.