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A method of improving touch precision of infrared touch screen

An infrared touch screen, precision technology, applied in the field of microprocessor control, touch point detection of infrared touch screen, can solve problems such as inability to obtain, and achieve the effect of improving touch accuracy

Inactive Publication Date: 2016-12-21
BEIJING IRTOUCH SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problem that in the prior art, when the two touch points in the touch detection area are very close, the boundary information of each touch point cannot be obtained to distinguish the two touch points, so as to provide an effective distinction Method for improving touch accuracy of infrared touch screen by obtaining boundary information of each touch point from two touch points

Method used

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  • A method of improving touch precision of infrared touch screen
  • A method of improving touch precision of infrared touch screen
  • A method of improving touch precision of infrared touch screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0044] This embodiment provides a method for improving the touch accuracy of an infrared touch screen, including the following steps:

[0045] S1: Select the first group of scan lines with the first inclination angle, and obtain the vertical starting boundary M of each touch point according to the occlusion range of each touch point on the first group of scan lines ia , the termination boundary M ib and the width W of each touch point i , and determine the number i of touch points according to the number of vertical start boundaries and end boundaries, where i≤2; select a second group of scan lines with a second inclination angle, according to each touch point to the second group The occlusion range of the scan line, get the starting boundary N of each touch point in the vertical direction ja , the termination boundary N jb and the width U of each touch point j , and determine the number j of touch points according to the number of vertical start boundaries and end boundar...

Embodiment

[0060] This embodiment serves as an optional implementation of Embodiment 1. In the step S1, the touch detection area can be scanned by the main axis light firstly through the main axis scanning method, and the vertical initial boundary M of each touch point can be obtained. ia , the termination boundary M ib and the width W of each touch point i ; Then use off-axis scanning to scan the touch detection area with off-axis light; obtain the vertical starting boundary N of each touch point ja , the termination boundary N jb and the width U of each touch point j . That is, the boundary and width information of the touch point in the horizontal and vertical directions are acquired through two scans of the main axis scanning and the off-axis scanning respectively. The quasi-touch point is obtained according to the boundary information in the horizontal and vertical directions, and then the position and size information of the real touch point can be obtained in combination with ...

Embodiment

[0063] In this embodiment, as an optional implementation of Embodiment 1, the step S1 can also scan the touch detection area in a one-to-many scanning manner, and select the main axis rays as the first group of scanning lines, A group of off-axis rays is selected as the second group of scanning lines. In this embodiment, a one-to-many scanning method is adopted, and only one scanning is required in a touch recognition process, which can reduce the scanning period and improve the operating efficiency of the system.

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Abstract

The invention relates to a method for improving the touch accuracy of an infrared touch screen. Two sets of scanning lines with different inclination angles are used, and the number of areas where each set of scanning lines is blocked by a touch point is determined according to the situation that each set of scanning lines is blocked by a touch point. The one with the larger number of occluded areas in the two groups of rays is selected as the actual number of touch points, so as to avoid the situation that two touch points are mistaken for one touch point. And after determining the start boundary and end boundary of each touch point according to the situation that the first group of scan lines is blocked, and then combining the width value of each touch point determined according to the situation that the second group of scan lines is blocked, determine two The initial border and termination border of each touch point separate the two touch points, solve the problem of merging two touch points due to insufficient scanning distance, and improve the touch accuracy of the infrared touch screen.

Description

technical field [0001] The invention relates to a method for improving the touch precision of an infrared touch screen, which belongs to the technical field of microprocessor control, and is especially used in the technical field of touch point detection of an infrared touch screen. Background technique [0002] In the infrared touch screen in the prior art, an infrared pair tube array is installed around the touch detection area. The infrared pair tube array includes an infrared emitting tube and an infrared receiving tube. It is controlled that only one infrared emitting tube emits infrared light at a certain moment, and the corresponding infrared receiving tube receives the infrared light. Therefore, at any moment, if it is detected that a certain infrared receiving tube does not receive infrared light, it can be determined that the infrared light corresponding to the emitting infrared emitting tube and the infrared receiving tube emitting light at this moment is blocked ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042
Inventor 王武军刘新斌
Owner BEIJING IRTOUCH SYST CO LTD
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