摘要
本设计主要实现LED显示屏随着环境光改变其亮度,以避免白天显示不清或黑夜因太亮而炫目;并与上位机进行通信.本系统由MSP430F169单片机、16*32共阳极LED点阵显示屏、行驱动电路、列驱动电路、环境光自适应电路、数字开关调压电路、直流稳压源电路等组成.采用按列并行发送数据,按行扫描的方式实现LED点阵屏内容的显示;单片机通过数字开关调压电路实现对LED点阵屏电源电压的自动调节,使屏幕亮度随环境光自动变化.
This design mainly realizes that the brightness of LED screen can vary with the ambient light in order to avoid the unclear display at daytime or dazzling display at night,and it can also communicate with the host computer.The system consists of MSP430F169 MCU,16＊32 Dot Matrix LED module of common-anode,line driving circuit,column driving circuit,ambient light adaptive circuit,digital switching voltage regulating circuit,DC regulated power supply and so on.Column data parallel transmission and line scanning are taken as the display style.The digital switching voltage-regulating circuit is controlled by MSP430F169 to realize the automatic regulation of the power voltage for LED screen,so as to make its brightness vary with the ambient light.
出处
《吉林化工学院学报》
CAS
2011年第7期59-63,共5页
Journal of Jilin Institute of Chemical Technology
