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Optical multipoint touch screen and implementation method thereof

A technology of a multi-touch screen and a realization method, which is applied in the directions of instruments, electrical digital data processing, and input/output processes of data processing, etc., can solve the problems of inability to multi-touch function, inability to distinguish correctly, etc., so as to improve the accuracy of optical touch. , The effect of convenient production and maintenance, simple hardware structure and layout

Inactive Publication Date: 2011-04-20
CHENGDU JIZHOU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to overcome the defect that the current optical touch screen cannot correctly distinguish which are real points and which are ghost points, and thus cannot fully realize the multi-touch function, and provide a device that not only has a simple structure and high resolution accuracy, but also can Effectively remove ghost points and truly realize multi-touch optical multi-touch screen

Method used

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  • Optical multipoint touch screen and implementation method thereof
  • Optical multipoint touch screen and implementation method thereof
  • Optical multipoint touch screen and implementation method thereof

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Effect test

Embodiment

[0034] Such as figure 1 As shown, the frame 1 of the present invention is a rectangular frame, and light guide elements 5 are arranged inside the frame 1 along its four side walls. The light guide elements 5 are connected end to end inside the frame 1 to form a closed quadrilateral, thereby forming an optical touch area inside the closed quadrilateral.

[0035] At the same time, in order to better realize the present invention, a cavity is also formed between the four side walls of the frame 1 and the four sides of the light guide element 5, and inside the cavity, each The light-emitting elements 3 at any position on the side, and the number of the light-emitting elements 3 is determined by the actual situation, and each side can be one or more. In order to ensure the use effect, the light-emitting element 3 is preferably realized by using an LED light source or an infrared laser light source.

[0036] Since the light guide element 5 plays a very important role in the formed...

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PUM

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Abstract

The invention discloses an optical multipoint touch screen which comprises a frame (1), a main controller (2), infrared monitoring units (4), and light-emitting elements (3), wherein the infrared monitoring units (4) are arranged at the inner sides of corners of the frame (1) and are connected with the main controller (2), and the light-emitting elements (4) are arranged at any position in the frame (1). The invention is characterized in that all the inner walls of the frame (1) are also provided with light guide elements (5); the number of the infrared monitoring units (4) is more than three; and the light-emitting elements (3) are positioned between the frame (1) and the light guide elements (5). In the invention, ghost points formed in a touch area can be removed effectively, the position of a practical touch point is obtained correctly, and the defects of the multipoint touch which can not be realized by the traditional optical touch screen are overcome.

Description

technical field [0001] The invention relates to an optical touch screen, in particular to an optical multi-point touch screen and a realization method thereof. Background technique [0002] At present, it has been more than ten years since the Chinese touch screen market began to rise in the late 1990s. Its touch technology is also emerging in an endless stream, and the characteristics of various touch screens are also mixed. At present, the mainstream touch technologies in the domestic market are mainly infrared, surface acoustic wave, resistive screen and capacitive screen. Because of their different principles, each has its own advantages and disadvantages. The acoustic wave screen can only recognize soft touch and has a slow response speed. The resistive screen is cheap but not resistant to scratches. Can identify conductive objects. The emergence of optical touch screens has basically solved the problems of many touch screens, and has sufficient conditions to lead the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042
Inventor 赵丽娴
Owner CHENGDU JIZHOU TECH
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