The ARM Based Hardware System of Infrared Multi-touch Screen Design and Research

摘要

In this paper, we designed for infrared multi-touch screen hardware system, aiming to the existing infrared multi-touch screen, which sensitive to highlight interference, low resolution and hard to solve multipoint issues and so on. We use the ARM kernel SCM 74HC595 to drive the infrared emission tube one by one, and process the infrared receiver tubes information through I2C Bus, in order to implement multipoint identification. In the design, the infrared light of filtered environment is used to implement the anti-glare interference; the quantized collected signals are used to achieve the high-resolution effect; and by determined the sequencing of touch-point to achieve multi-point identification. The Experiment results show the validity of our design for system.