Positioning method and system for infrared touch screen

Abstract

The invention discloses a positioning method and system for an infrared touch screen. The method comprises the following steps: providing an infrared touch screen, a plurality of infrared transmitting pipes and a plurality of infrared receiving pipes, wherein a plurality of left-leaning first oblique lines and right-leaning second oblique lines are formed between the infrared transmitting pipes and corresponding infrared receiving pipes; diagnosing positions of at least two touch notches on the infrared touch screen; recording a plurality of vertical lines and the first oblique lines passing the touch notches; calculating and obtaining a plurality of intersection points of the vertical lines and the first oblique lines; detecting whether all the intersection points shield the second oblique lines or not; confirming that the intersection points are real touch points if the intersection points shield the second oblique lines; calculating and obtaining the coordinate values of the real touch points. According to the invention, sweep time of the infrared transmitting pipes and the infrared receiving pipes is shortened; sweep frequency, response speed and positioning accuracy of the infrared touch screen are improved; stable fluency of positioning and touching of the infrared touch screen is improved.

Description

technical field [0001] The invention relates to the technical field of infrared touch screens, in particular to an infrared touch screen positioning method and system. Background technique [0002] As a new type of computer input device, touch screen makes human-computer interaction more intuitive and greatly facilitates the work and life of users. Therefore, touch screen has been widely used in public information, office automation equipment, communication equipment and other fields. [0003] At present, the existing infrared touch screen devices usually have infrared emitting tubes and infrared receiving tubes in two straight directions, horizontal and vertical, and the two-way infrared emitting tubes and infrared receiving tubes together form a positioning plane. Whether an infrared signal is blocked between the corresponding infrared emitting tube and the infrared receiving tube changes, and the position coordinates of the touch point are calculated and determined accord...

AI Technical Summary

Problems solved by technology

[0004] However, the positioning method of the above-mentioned infrared touch screen device generally relies on the recognition algorithm of the geometric figure structure, and its process is complicated and the data is redundant, which also makes the hardware structure of the infrared touch screen relatively complicated, the control side is relatively complicated, the calculation is time-consuming, and the data is redundant. The response speed is slow and affects the accuracy of infrared touch positioning

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