Analysis and Design of IR Driven Circuit for Infrared Touch Screen

Abstract

Infrared (IR) touch screen is a reliable and stable product of human computer interaction, and there are two kinds of infrared drive mode, which are constant voltage driven and constant current driven. In production engineering, constant voltage driven mode is often used considering of the cost. Two kinds of driven circuit were designed in this paper, and the power supply ripples are analyzed to put forward more suitable IR driven mode for infrared touch screen.