A multi-point positioning method for an infrared touch screen device

Abstract

The invention provides an infrared touch screen device and a multipoint positioning method thereof. The infrared touch screen device comprises an infrared electronic whiteboard; the infrared electronic whiteboard comprises an infrared control module, an emitting module and a receiving module; the emitting module comprises an emitting selection circuit, a drive circuit and an infrared emitting tube array; the receiving module comprises a receiving selection circuit, a signal amplification circuit and an infrared receiving tube array; and the infrared emitting tube array is opposite and parallel to the infrared receiving tube array. The invention also provides a multipoint touch positioning method of an infrared touch screen. The multipoint touch positioning method comprises the following steps: firstly, dividing the infrared touch screen into regions; subsequently, determining positions of the regions of touch points by scanning; and finally, calculating accurate position coordinates of the touch points of the regions. Through the multipoint touch positioning method, cost is saved and positioning efficiency is improved.

Description

technical field [0001] The invention relates to a multi-point positioning method for an infrared touch screen device. Background technique [0002] The traditional infrared whiteboard is composed of X-axis and Y-axis in pairs to form a rectangular transmitting and receiving circuit. The X-axis emits infrared rays, and the infrared receiving tube on the opposite side receives infrared signals. The Y-axis emits infrared rays, and the infrared receiving tube on the opposite side receives infrared signals. , the design of the infrared whiteboard in this way requires high hardware costs, and the infrared detection program will be more complicated, and there is no control circuit that can control the signal emitted by a certain infrared transmitting tube and the signal received by a certain infrared receiving tube, resulting in the inability to be very accurate. The positioning to the touch point. [0003] It can also be seen that there is an infrared whiteboard that is only cove...

AI Technical Summary

Problems solved by technology

[0002] The traditional infrared whiteboard is composed of X-axis and Y-axis in pairs to form a rectangular transmitting and receiving circuit. The X-axis emits infrared rays, and the infrared receiving tube on the opposite side receives infrared signals. The Y-axis emits infrared rays, and the infrared receiving tube on the opposite side receives infrared signals. , the design of the infrared whiteboard in this way requires high hardware costs, and the infrared detection program will be more complicated, and there is no control circuit that can control the signal emitted by a certain infrared transmitting tube and the signal received by a certain infrared receiving tube, resulting in the inability to be very accurate. The positioning to the touch point

[0003] It can also be seen that there is an infrared whiteboard that is only covered with infrared emitting tubes on two opposite sides of an axis (X axis or Y axis), and the infrared receiving tubes are located at the four corners, which can reduce costs, but there are A stability problem, such as a corner of the infrared receiving tube is broken, the accuracy of judgment and detection will be reduced, and there is a lack of flexibility in detection, for example, if you want to detect the transmitting and infrared receiving tubes with a fixed slope, you must not easy to detect

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