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Touch point positioning device and method

A positioning device and positioning method technology, applied in the direction of instruments, electrical digital data processing, user/computer interaction input/output, etc., can solve the problem that the angle of infrared tube light is limited, multi-point scanning cannot be realized, and the cost of touch devices is increased. problem, to achieve the effect of multi-touch positioning, simple structure and low cost

Inactive Publication Date: 2013-01-09
GUANGDONG VTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this invention, the infrared scanning unit is an infrared tube. The shortcoming of this method is: (1) the angle of the infrared tube emitting light is limited, only one tilt scan can be added, and two or more tilt scans cannot be performed, so it is impossible to realize real In the sense of multi-point scanning; (2) the light energy of the infrared tube is concentrated in a small range, so that when scanning obliquely, the light energy is very low and the effect is not good; (3) if a large-angle infrared tube is used, the sensitivity of the touch device is improved. cost and higher power consumption

Method used

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  • Touch point positioning device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A touch point positioning device, such as figure 1 As shown, it includes a control unit 201, an infrared receiving tube array 202, an inline infrared laser light source 203 and an inline infrared laser light source 204, and the control unit 201 is connected with the infrared receiving tube array 202, the inline infrared laser light source respectively 203, the inline infrared laser light source 204 is connected and controlled respectively.

[0029] Wherein the infrared receiving tube array 202 is installed on the three frames of the touch screen (that is, the infrared receiving tubes a+1 to a+n installed on the left frame of the touch screen, the infrared receiving tube b installed on the lower frame of the touch screen +1 to b+n, the infrared receiving tubes c+1 to c+n installed on the right frame of the touch screen), the two ends of the upper frame of the touch screen are respectively equipped with a word line infrared laser light source 203 and a word line Type inf...

Embodiment 2

[0037] Present embodiment except following feature other structures are with embodiment 1:

[0038] Such as image 3 As shown, on the basis of the device diagram of Embodiment 1, a linear laser light source 205 is added, and the light source is placed between the linear laser light sources 203 and 204 to realize the identification and positioning of multiple touch points. Its location method is the same as embodiment 1.

[0039] Such as image 3 As shown, when there are obstructions D and B, the oblique lines L3, L4, L7, and L8 can be obtained by scanning the corresponding infrared receiving tubes through the inline laser light source 203 and the inline laser light source 204, The four intersection points B, C, D, and E can be obtained through calculation, but it is impossible to judge whether the occluders are some of them or all of them. The present embodiment is provided with an inline laser light source 205 more, then according to the corresponding infrared receiving tu...

Embodiment 3

[0041] Present embodiment except following feature other structures are with embodiment 1: as Figure 4 As shown, in the device diagram of Embodiment 1, a line-shaped laser light source 206 is added, which is placed on the touch screen at a corner different from the position of the line-line laser light sources 203 and 204, so as to realize multiple touches. point identification. Its location method is the same as embodiment 1.

[0042] Such as Figure 4 As shown, when there are obstructions F and H, the oblique lines L9, L10, L11, and L12 can be obtained by scanning the corresponding infrared receiving tubes through the inline laser light source 203 and the inline laser light source 204, The four intersection points of F, G, H, and J can be obtained through calculation, but it is impossible to judge whether the occluders are some of them or all of them. The present embodiment is provided with an inline laser light source 206 more, then according to the corresponding infrar...

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PUM

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Abstract

The invention discloses a touch point positioning device which comprises a control unit, an infrared receiving tube array and more than two straight infrared laser light sources, wherein the straight infrared laser light sources are arranged on different positions of a frame of a touch display screen, the infrared receiving tube array is arranged on the frame of the touch display screen, an infrared laser plane formed by infrared laser emitted by the straight infrared laser light sources covers the touch display screen, and the infrared laser is received by the infrared receiving tube array on the frame of the touch display screen; and the control unit is respectively connected with the infrared receiving tube array and the straight infrared laser light sources and used for controlling the infrared receiving tube array and the straight infrared laser light sources. The invention also discloses a touch point positioning method. The device has the advantages of accurate positioning, simple structure, wide application range, low realizing cost, capability of effectively realizing the multipoint touch positioning, and the like.

Description

technical field [0001] The invention relates to the technical field of electronic touch, in particular to a touch point positioning device and method. Background technique [0002] The existing infrared touch device is to form a transmitting and receiving pair of infrared emitting and infrared receiving elements in a one-to-one correspondence, and form a mutually perpendicular emitting and receiving array along the edge of the touch screen surface. By detecting the difference between each pair of infrared emitting and receiving elements, Whether the infrared light between them is blocked, and judge whether there is a touch event. A big disadvantage of this method is that only one touch point can be detected. If there are two or more touch points at the same time, the actual touch point cannot be distinguished. [0003] Chinese invention patent CN101493740A discloses a method for identifying multiple real touch points on an infrared touch screen. The method first performs in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/03G06F3/042
Inventor 徐响林钟杰婷刘小青
Owner GUANGDONG VTRON TECH CO LTD