Design of New LED Curtain Wall Controller and Its Effect in Architectural Decoration

Abstract

In recent years, LED with high brightness or ultra-high brightness has appeared. Because of its low production cost, it has been widely used. Compared with other display media, LED has the advantages of rich display content, wide dynamic range, vivid picture, no pollution, long life, etc., so it is used in building curtain wall facade decoration. This research designs LED curtain wall control system, the use of SD600 chip dimming control of LED, the use of absorbing current mode LED drive, further design of single SD600 chip application circuit, multi-SD600 chip application circuit. LED curtain wall display text need to design the corresponding graphic processing hardware, the hardware is composed of ARM microprocessor LPC2210 and its related peripheral circuits. The core chip of the LPC2210 processor chip needs 1.8 V working voltage, and the I/O interface voltage is 3.3 V, so it is necessary to design the corresponding power circuit; The system clock is adjusted through the internal PLL circuit to make the system run faster and design its crystal oscillator circuit; The power monitoring chip CAT1025JI-30 is adopted to build reset circuit, 20-pin interface type JTAG interface circuit; It is considered that the UARTO interface can’t be directly connected with the RS232 interface of PC, the MAX3232 chip is introduced for level conversion, and the serial interface circuit based on LPC2210 is designed. In the experiment, the new technology is used for outdoor lighting LED curtain wall construction, and the development tool uses the ADS1.2 provided by ARM company. The μ C/OS-II embedded operating system is introduced to control the graphic processing hardware resources, reading the file from the SD card, and writing the text file and BMP file into the three-dimensional array, the corresponding text and pattern effect are displayed in the LED curtain wall.