摘要
红外触摸屏主要依靠红外光线工作,对环境光照因素的变化比较敏感,所以对红外触摸屏的抗强光干扰的研究是学者们关注的主要问题之一。论文研究了具有锁相放大环节的红外屏接收电路,红外发射电路发射出红外光经过光电转换后进入锁相放大电路中,经锁相放大后能有效提取出有用信号,并滤除光干扰,实现抗强光干扰的目的。
Infrared touch screen is sensitive to the background light,because it mainly depends on infrared light to work.So scholars take the resistance of light interfere as an important task.This paper researched infrared receive circuit that contained lock-in-amplifier. The infrared light came from the transmission circuit via photoelectric conversion, and processed by the lock- in-amplifier. Then the useful signal was picked up, while the light interference was filtered. In that case, the resistance of light interference is fulfilled.
出处
《电子设计工程》
2011年第4期59-61,共3页
Electronic Design Engineering
关键词
红外
触摸屏
光干扰
锁相放大
infrared
touch screen
light interfere
lock-in-amplifier
