The LED display screen integrates microelectronic technology, computer technology and information processing into one, which has become the most advantageous of the new generation of display media, with bright colors, large dynamic range, high brightness and long service life.
LED displays have been widely used in banking, securities trading, highway signs, airports, advertising and other industries. According to the display color, the LED display is divided into a monochrome screen, a two-color display and a full-color display.
With the diversification of LED display colors and the increasing display requirements, the drive circuit and control technology of LED display screens have also been improved and developed accordingly. The earliest monochrome screens only display Chinese characters.
Simple characters or numbers, so the controller's requirements are relatively low.
With the wide application of two-color LED displays, the performance of their controllers will also increase. In recent years, full-color LED displays with red, green, blue, and gray primary color display effects have received great attention due to their colorful display effects.
Each true color pixel includes three sub-pixels of red, green and blue.
Use spatial color blending to achieve multicolor. Based on low-power MSP430 microcontroller technology, the LED full-color display dynamic scanning control system is designed. The system's grayscale control technology uses a new method of pulse width modulation (PWM) and 19
The combination of game display principles.
The method improves the efficiency of the LED lamp and enhances the layering of the image while satisfying the 256-level gray scale display condition. The drive circuit adopts 1/8 scan constant current drive mode, which fully utilizes the I/O port resources of the single chip to complete the control.
The system supports text, 256-level grayscale full-color LED screen.