Infrared touch positioning device

Abstract

The invention discloses an infrared-touch positioning device. The device comprises a microprocessor, at least one set of an emission module and an receiving module which are oppositely distributed, and the emission module comprises a first driving circuit and a plurality of infrared emitting tubes; the receiving module comprises a second driving circuit, a plurality of infrared receiving tubes, a data reading module and a signal amplifying circuit; the microprocessor controls the gating of each infrared emitting tube and each infrared receiving tube in sequence by controlling the first driving circuit and the second driving circuit, and reads induction signals of the infrared emitting tube by controlling the data reading module; the induction signals are output to the microprocessor after being amplified by the signal amplifying circuit; the microprocessor converts the induction signals into digital signals, converts the digital signals into the corresponding coordinate information and outputs to a display module for being displayed through an interface module. The infrared-touch positioning device of the invention has the advantages that the cost of the whole infrared-touch positioning device is lowered because just one microprocessor is used, the cost of the whole infrared-touch positioning device is reduced, the circuit structure is simple and the anti-interference performance is strong.

Description

technical field [0001] The invention relates to electronic touch technology, in particular to an infrared touch positioning device. Background technique [0002] Electronic touch technology provides great convenience for human-computer interaction, and also provides a variety of technical solutions, and the performance and reliability are constantly improving. At present, there are two common electronic touch technologies in the market: one is the passive method, which uses resistance, capacitance, and infrared scanning technology, and is characterized by touch positioning without a specially made electronic pen; the other is the active method. , such as electromagnetic positioning and ultrasonic positioning, this method requires a specially made electronic pen to achieve touch positioning. Once the pen is lost or damaged, the entire positioning system will not work. With the continuous development of electronic touch technology, infrared scanning positioning technology has...

AI Technical Summary

Problems solved by technology

[0003] Although the infrared positioning technology has many advantages, but because the infrared emitting tube has a fixed emission angle, the infrared emitting tubes will interfere with each other. The infrared positioning touch device of the prior art adds a light guide hole on the edge of the screen to improve the interference. , the light guide hole is a shell integrated with the screen frame. Aligning the infrared emitting tube and the receiving tube with the light guide hole can suppress the interference between the infrared emitting tubes, but in the process, the infrared emitting tube and the receiving tube are connected to the light guide Hole alignment increases the difficulty of the production process

[0004] The Chinese invention patent with the publication number CN2927174Y discloses an anti-interference infrared touch device. In the invention patent, both the transmitting module and the receiving module are equipped with a slave microprocessor, and the slave microprocessor is connected to the main processor through a bus interface. , can improve the anti-interference ability, but it needs to use multiple microprocessors, the cost is relatively high, and the circuit structure is relatively complicated

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