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Device for detecting touch of infrared touch screen

An infrared touch screen and detection device technology, applied in computer multimedia applications, converting mechanical vibration signals into electrical signals and used in microcontroller systems, sensing measurement and signal processing fields, can solve problems such as misoperation and inability to distinguish interference from environmental objects

Inactive Publication Date: 2007-07-18
BEIJING UNITOP NEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, in practical applications, the existing infrared touch screens have a shortcoming: that is, they cannot distinguish the interference of environmental objects.
For example, a flying insect falling on the screen, or a large floating object, and other occasional obstructions, etc., may be considered by the touch screen as a human finger touching, causing misoperation

Method used

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  • Device for detecting touch of infrared touch screen
  • Device for detecting touch of infrared touch screen
  • Device for detecting touch of infrared touch screen

Examples

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Embodiment Construction

[0014] specific implementation plan

[0015] The present invention is capable of many specific embodiments.

[0016] FIG. 1 shows an implementation of using strain gauges to realize touch force (or called impact force) as a mechanical force detection sensor. Generally, in order to protect the screen of the display, especially in the case of a large number of liquid crystal displays, the surface of the screen is relatively fragile, and a (toughened) glass plate 101 is installed inside the frame 102 (indicated by a dotted line) of the touch screen. Thus, strain gauges (also referred to as resistance strain gauges) 103 are mounted on the surface of the edge portion of the glass plate. As shown in the figure, since the edge of the glass plate 101 goes deep into the frame 102 used to protect the infrared emitting and receiving tube array 104 , the frame of the touch screen also protects the strain gauge at the same time. Shown in FIG. 1 is the situation that four strain gauges 10...

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Abstract

A device used for detecting touch of infrared touch screen uses foil gauge set at edge region of protective glass on touch screen as mechanical transducer to realize said detection. It is featured as connecting detected electromechanical signal to I / O interface of micro-controller after said signal is processed by signal processing circuit and applying said signal as necessary condition for judging occurrence of touch event in order to raise touch screen judgment accuracy on touch event.

Description

technical field [0001] The invention belongs to the technical field of sensing measurement and signal processing, especially the technical field of converting mechanical vibration signals into electrical signals and using them in microcontroller systems. In the present invention, it is applied in the technical field of touch signal detection of an infrared touch screen, and belongs to the technical field of computer multimedia application. technical background [0002] Infrared touch screen is already a very mature technology, widely used. Patent applications with numbers 00121462.4, 00250806.0, 00200147.6, 00262072.3, 01202252.7, 200420093591.3, 2004201 17952.3, etc. have provided many technologies of infrared touch screens, including various improved technical solutions. However, in practical applications, the existing infrared touch screens all have a shortcoming: that is, they cannot distinguish the interference of environmental objects. For example, a flying insect fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G01L1/00
CPCG06F3/0421G06F3/0414G06F2203/04106G06F3/04142G06F3/04162
Inventor 叶新林刘建军刘新坤
Owner BEIJING UNITOP NEW TECH CO LTD
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