Multi-frequency scanning infrared touch device

A multi-frequency scanning, infrared touch screen technology, applied in the direction of instrument, electrical digital data processing, data processing input/output process, etc., can solve problems such as increasing the design and manufacturing cost of infrared touch devices, increasing the complexity of software and hardware, and stalling. , to achieve the effect of simple software and hardware structure, easy debugging, and improved scanning speed
CN101788870BInactive Publication Date: 2013-04-24深圳新山鹰互动技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
深圳新山鹰互动技术有限公司
Publication Date
2013-04-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a multi-frequency scanning infrared touch device. Infrared emitters and receiving geminate transistors are divided into a plurality of groups, each emitter in each emitter group is simultaneously driven by a carrier frequency source and a drive module of the infrared emitter; and the number of the carrier frequency sources is the same with the number of the emitters in a emitter group, but the frequencies thereof are different. The electrooptical signal output end of each detector in each detector group is connected with the output ends of the receiving tube with the same number in other detector groups, and then is connected with an amplification processing unit comprising a filter which corresponds to the output frequency of each carrier frequency source, and theprocessed result is transmitted to a microcontroller controlling the touch device for realizing the coordinate detection of a touched object. The invention has the advantages of driving multiple pairs of emitters and the receiving tube in one group simultaneously and performing scanning detection without mutual interference, thus being capable of improving scanning speed by multiple times and being suitable for infrared touch devices with a larger size.
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Description

technical field

[0001] The invention relates to an infrared touch device, which belongs to the technical field of computer human-computer interaction, in particular to the technical field of touch point detection and scanning for an infrared touch device. Background technique

[0002] The main structure and principle of the existing infrared touch device (that is, the infrared touch screen in general sense) is to install several pairs of infrared emitting and receiving tubes on the frame, and then use the microcontroller system inside the touch device through the I / O port to Control the driving module for driving the infrared emitting tube and the gating module for gating the infrared receiving tube, drive and gating each pair of infrared emitting and receiving tubes in a certain order, and complete the vertical and horizontal scanning of the touch surface. Then by detecting which pair of emitting and receiving tubes is blocked, the position of the touch object on the displa...

Claims

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