Method for discriminating multiple points on infrared touch screen

An infrared touch screen and touch point technology, which is applied in the touch point detection of computer touch screen and microprocessor control field, can solve the problems that infrared touch screen cannot be applied, and achieve the effect of extremely low application cost, easy detection and low application cost
CN101075168AActive Publication Date: 2007-11-21BEIJING IRTOUCH SYST CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING IRTOUCH SYST CO LTD
Publication Date
2007-11-21

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Abstract

A method for identifying multiple touch-point on infrared touch screen includes using light cut off by touch object between emitting and receiving tubes of co-axis and off-axis to confirm approximate coordinate value of touch point at one direction and preliminarily rejecting out pseudo-touch point and then using the same means to do the same thing on another direction for finally obtaining accurate coordinate value of all touch points and simultaneously rejecting out all pseudo-touch points.
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Description

technical field

[0001] The invention relates to a method for detecting touch points on an infrared touch screen, which belongs to the technical field of microprocessor control, in particular to the technical field of touch point detection for computer touch screens. Background technique

[0002] As a branch of computer touch screen, infrared touch screen is gradually widely used in various fields due to its advantages of convenient installation, maintenance-free, high explosion resistance, and high reliability. Although through more than 20 years of development, there are numerous technical improvements, such as the content announced by Chinese patents such as 95105303.5, 00121462.4, or applications. However, the current basic technical solutions of infrared touch screens are still limited to the technical contents disclosed in US Patent Nos. 3,764,813, 3,775,560, and 3,860,754. However, these technical contents are far from the technical level that the infrared touch scree...

Claims

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