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Infrared touch panel and multi-point touch locating method

A positioning method and multi-touch technology, applied in the direction of instruments, electrical digital data processing, data processing input/output process, etc., can solve the problems of difficult recognition of touch points and affect the use effect, so as to improve the recognition rate and be easy to realize , The effect of eliminating blind spots

Inactive Publication Date: 2008-07-23
GUANGDONG VTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there are multiple touch points in these areas, it will be difficult to recognize the touch points
These problems will affect the actual use effect when they appear on the small size touch screen

Method used

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  • Infrared touch panel and multi-point touch locating method
  • Infrared touch panel and multi-point touch locating method
  • Infrared touch panel and multi-point touch locating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Fig. 2 is a schematic diagram of the first embodiment of the present invention. In the figure, 201, 201, 203, 204 are infrared emitting elements installed on the transmitting circuit board, and 205, 206, 207, 208 are infrared receiving elements installed on the receiving circuit board. It can be seen from the figure that in the detection direction of 201, 205, the infrared emitting element and the infrared receiving element are vertically facing each other, and in the detection direction of 203, 208, the infrared emitting element 203, 204 faces the touch screen. The center is deflected by a certain angle, and the direction of the deflection angle of 203 is opposite to that of 204. Correspondingly, the infrared receiving elements 207, 208 are also deflected by a certain angle to the center of the screen. In this way, 203 is not only perpendicular to 208, but also obliquely opposite to 207, while 204 is vertically opposite to 207, obliquely opposite to 208, and 203, 204, ...

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PUM

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Abstract

The invention relates to an infrared touch screen, wherein on at least on detection direction, an infrared emitter and two infrared receivers are deflected toward the center of a touch screen to inverse the directions of the infrared emitter and the infrared receivers to form crossed relation. The invention further provides a multipoint touch positioning method of the infrared touch screen, which comprises (a), respectively initializing the infrared receiver vertical with the infrared emitter and the infrared receiver inclined and opposite with the infrared emitter, (b), vertically scanning and detecting, comparing with vertical initialized value, (c), calculating the possible position coordinate of each touch point, (d), processing inclined scanning detection to be compared with inclined initialized value, (e), determining the relation expression between the real coordinates X, Y of the touch point, checking the possible coordinates calculated in the step (c) in the relation expression, and determining the position coordinate of each touch point. The invention has simple structure and low cost, which can realize accuracy multipoint touch positioning.

Description

【Technical field】 [0001] The invention relates to an infrared touch screen, in particular to an infrared touch screen capable of distinguishing multiple touch points for simultaneous operation and a multi-touch positioning method. 【Background technique】 [0002] At present, a touch screen has been widely used in many occasions and fields as an input device replacing or supplementing a common keyboard and mouse. In existing touch screens, the location detection technology for detecting the touch location can be based on different technologies, including infrared, camera, surface acoustic wave, etc. Users usually do not need to undergo special operation training, and only need to press the touch screen at the place marked by the relevant icon to implement a series of complex instructions. [0003] With the development of science and technology, especially the development of computer software and hardware technology, computers have powerful functions and can be used in almost ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042
Inventor 卢如西
Owner GUANGDONG VTRON TECH CO LTD
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