The working principle of LED display screen

LED luminous principle
LED (Light Emitting Diode) is a semiconductor device that can convert electrical energy into light energy. When current passes through an LED, electrons and holes recombine inside the semiconductor, releasing energy and emitting light. LEDs made of different materials can emit light of different colors, such as red, green, blue, etc.
The display principle of LED display screen
LED display screen is composed of a matrix module or pixel unit composed of many LED light beads. Each pixel unit is composed of LED beads in three colors: red, green, and blue. By controlling the brightness of the LED beads in different colors, various colors can be mixed.
When displaying images or text, the control system converts the information of the images or text into digital signals, and then converts the digital signals into current signals through the driving circuit to control the brightness of the red, green, and blue LED beads in each pixel unit, thereby displaying the corresponding images or text.