Method for driving infrared multi-point touch screen

A technology of multi-touch screen and driving method, applied in the input/output process of data processing, instruments, electrical digital data processing, etc. The effect of response rate

Inactive Publication Date: 2012-10-10
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a driving method for an infrared multi-point touch screen to solve the problems of long scanning time and slow response speed in the prior art large-size infrared touch screen

Method used

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  • Method for driving infrared multi-point touch screen
  • Method for driving infrared multi-point touch screen
  • Method for driving infrared multi-point touch screen

Examples

Experimental program
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Embodiment Construction

[0017] Such as figure 1 shown. The surroundings of the upper touch panel and the lower touch panel are respectively covered with infrared tubes, wherein the adjacent two edges of the lower touch panel are covered with infrared emitting tubes 12, and the remaining two adjacent edges are covered with infrared receiving tubes 13. The outgoing light of the infrared emitting tubes 12 is directed to the opposite infrared receiving tubes 13 in one-to-one correspondence, forming a vertically orthogonal pair of infrared tubes. Infrared emitting tubes 14 inclined at a certain angle are placed on two adjacent edges of the upper touch panel, and infrared receiving tubes 15 inclined at a certain angle are placed on the other two adjacent edges. figure 1 (a), (b) two structures, where figure 1 In (a), the outgoing light of each infrared emitting tube on the upper touch panel corresponds to the infrared receiving tube on the adjacent edge along the oblique direction, forming an obliquely i...

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Abstract

The invention discloses a method for driving an infrared multi-point touch screen. A touch panel has a double-layer structure; vertically orthogonal infrared paired tubes are distributed on the periphery of a lower touch panel layer; slantly intersectant infrared paired tubes are distributed on the periphery of an upper touch panel layer; the infrared paired tubes on the periphery of the lower touch panel layer are divided into multiple groups and are driven at the same time and detect luminous flux of a receiving tube at the same time; after the infrared touch screen is started, the infrared paired tubes on the lower touch panel layer are driven first; if there is only one touch point, a direct response is made to the touch screen and scanning is ended; and if more than one touch point is detected, according to inclination angles of the inclined infrared paired tubes on the touch panel layer, positions of the inclined infrared paired tubes are computed, the infrared paired tubes are selectively driven, fake touch points are eliminated and multi-point touch is realized. By the method for driving the infrared multi-point touch screen, the scanning time of the infrared tubes is effectively shortened and the responding speed of the touch screen is improved.

Description

technical field [0001] The invention relates to the field of multi-point touch screens, in particular to a driving method for an infrared multi-point touch screen. Background technique [0002] At present, the sensor-based touch screens used in various occasions mainly include resistive touch screens, capacitive touch screens, surface acoustic wave touch screens and infrared touch screens. Compared with other touch screens, infrared touch screens have better visual effects and positioning principles, and are not afraid of electromagnetic interference. Especially on the large-size touch screen, the application is more extensive. The infrared touch screen is covered with infrared tubes around the touch screen, in which the infrared emitting tubes and infrared receiving tubes correspond one by one to form an orthogonal infrared network. Infrared light can determine the position of the touch point. However, in large-scale applications, the number of infrared pairing tubes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042
Inventor 胡跃辉吕国强李小哲吴娟尹静施承佩
Owner HEFEI UNIV OF TECH
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