Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optical touch screen and touch positioning method thereof

An optical touch screen and touch positioning technology, applied in the field of human-computer interaction, can solve the problems of large dark spots and difficult to accurately locate the position of objects, and achieve the effects of simplifying the structure, saving costs, and saving production processes

Active Publication Date: 2011-08-17
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI +1
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because the traditional touch screen is positioned in such a way that the reflective strip is blocked by the object to form a dark spot in the image of the camera, the dark spot formed is larger and it is difficult to accurately locate the position of the object

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical touch screen and touch positioning method thereof
  • Optical touch screen and touch positioning method thereof
  • Optical touch screen and touch positioning method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] figure 1 The detailed structure of an optical touch screen in an embodiment is shown, and the optical touch screen includes a display device 10 , a base plate 30 , a transmitting device 50 , an image acquisition device 70 and a processor 90 .

[0051] The display device 10 is configured to respond through projection according to the click position of the sensing object in the touch detection area. In this embodiment, in order to construct the user operation interface, the display device 10 projects a touch detection area on the base plate 30, and the user performs a click operation in the touch detection area, and the display device 10 responds according to the click position, changing the displayed area in the touch detection area. content. The sensing object is the user's finger or other objects entering the touch detection area. The sensing object enters the touch detection area and clicks on the touch detection area. In a preferred embodiment, the display device ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an optical touch screen that comprises a display device, a bottom plate, an emitting device, an image collecting device, and a processor, wherein the display device is used for response by the projection according to the clicking position of a sensing object in a touch detection area; the bottom plate is used for exhibiting the touch detection area of the projection; the emitting device is used for emitting laser that is arranged in parallel with the touch detection area and covers the touch detection area; the image collecting device is used for receiving the laser that is reflected by the sensing object in the touch detection area and generating light spot images according to the reflected laser; and the processor is used for obtaining the clicking position of thesensing object in the touch detection area by calculation according to the position of the light spot in the light spot image and the coordinate converting matrix in the touch detection area. By adopting the optical touch screen and the touch screen positioning method thereof, the laser emitted by the emitting device covers the touch detection area; and as the laser has very good directivity, more irregular and uniform light spots can be formed as to the laser that is reflected by the sensing object, thus positioning the position of the sensing object more accurately, and obtaining higher positioning precision.

Description

【Technical field】 [0001] The invention relates to human-computer interaction technology, in particular to an optical touch screen and a touch positioning method for the optical touch screen. 【Background technique】 [0002] With the rapid development of multimedia information technology, people are increasingly using the touch screen, a human-computer interaction device. The touch screen based on optical technology has been widely used due to the advantages of simple structure and low price. [0003] A reflective strip is set in a traditional touch screen. During the working process, the LED (Light Emitting Diode, Light Emitting Diode) light source illuminates the reflective strip. When an object enters the touch detection area of ​​the touch screen, the reflective strip is blocked by the object and formed in the image of the camera. The dark spot, and then determine the position of the object in the touch detection area through the position of the dark spot. [0004] Howev...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042
Inventor 宋展许军陈曦卢桥江
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com