Infrared touch screen multi-point recognizing method

A multi-point recognition, touch screen technology, applied in the input/output process of instruments, electrical digital data processing, data processing, etc., can solve the problem of inability to recognize multi-point touches, save scanning time, shorten time, and improve accuracy Effect

Inactive Publication Date: 2009-03-18
贺伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the inability to quickly and effectively identify multi-point touches in the existing infrared touch technology, and at the same time

Method used

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  • Infrared touch screen multi-point recognizing method
  • Infrared touch screen multi-point recognizing method
  • Infrared touch screen multi-point recognizing method

Examples

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Embodiment Construction

[0041] The following is an embodiment proposed by the inventor, the purpose is to prove that it is feasible to realize the method described in the patent of the present invention, but the algorithm required to realize the described multi-point recognition method can be far from limited to this one, any As long as the purpose of the algorithm is to calculate the scanning angle, scanning position and range, the method should belong to the protection scope of this patent, including how to select and calculate the emission, the scanning pairing of the receiving tube, and the ability to detect the crossover area after it is turned on. The coordinates of the occluded object, etc., due to the limitation of the patent application time and text description, so the following simple examples can only be used to illustrate the feasibility of realizing this patent. Of course, there are better and more excellent algorithms that can be used. I will not make a statement here.

[0042] Infrare...

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Abstract

The invention discloses a multi-point recognition method of an infrared touch screen, which comprises steps as follows: a system performs vertical scanning to determine whether an object's coordinate is acquired or not, an identification number is created for the seized object while the coordinate value of the object is recorded so as to determine whether more than one object's coordinate is existed or not, serial-number ranges of receiving tubes on an X axis and a Y axis where signals are changed abnormally are taken to create overlap regions on the X axis and the Y axis for each object, coordinates of the overlap regions on the X axis and the Y axis are compared in groups of every two objects so as to conform crossed areas of the overlap regions on the X axis and/or the Y axis, then the crossed areas are progressively scanned out of the vertical, actual coordinate values of the objects are output according to the signal variation of the receiving tubes, and finally the overlap regions of all the objects are compared. The invention has the advantages that the invention can automatically select a target region to scan via multiple angles, thereby shortening the required time of multi-point scanning, increasing the accuracy of scanning, and realizing the quick recognition of multi-point moving objects.

Description

technical field [0001] The invention relates to an infrared touch screen coordinate detection technology, in particular to a technology for detecting coordinates of multiple touch points. Background technique [0002] In the existing infrared touch screen system, the vertical scanning method is usually used, and generally only single-point touch recognition can be achieved. When more than one touch object touches the surface of the screen, due to the mutual occlusion of the objects, some touch objects The X or Y coordinates of the X or Y coordinates completely or partially overlap, and touch detection and judgment cannot be realized. For example, the following are two very typical multi-point recognition situations: [0003] The first one, as shown in Figure 1, is the case of uniaxial overlap. The infrared emitting tube 1 and the infrared receiving tube 2 are respectively arranged opposite to each other. The coordinates on the axis are too close to each other, causing the Y...

Claims

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Application Information

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IPC IPC(8): G06F3/042
CPCG06F3/0421
Inventor 贺伟
Owner 贺伟
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