Check patentability & draft patents in minutes with Patsnap Eureka AI!

Optical touch system and positioning method thereof

A technology of optical touch and positioning method, which can be used in instruments, electrical digital data processing, input/output process of data processing, etc., and can solve problems such as blind spots.

Inactive Publication Date: 2016-05-18
PIXART IMAGING INC
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention aims at the deficiencies of the above-mentioned prior art, and proposes an optical touch system using a light projection device that can select self-illumination and external light reflection and its positioning method, which can effectively solve the problem of blind spots in the prior art. question

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 system and positioning method thereof
  • Optical touch system and positioning method thereof
  • Optical touch system and positioning method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0091] Figure 4 A schematic diagram showing an optical touch system according to an embodiment of the present invention. When an object 45 (such as a finger or a stylus pen) touches the touch area 48 of the optical touch system 4 , the system calculates and locates the coordinates of the object 45 . The optical touch system 4 includes a reflective element 41 , first and second light emitting elements ( 421 , 422 ), a first light projection device 471 , an image sensor 43 and a processor 44 . The reflective element 41 is disposed on the first side 481 of the touch area 48, and the first light emitting element 421 and the second light emitting element 422 are respectively disposed on the second side 482 and the third side 483 adjacent to the touch area 48. , wherein the third side 483 is opposite to the first side 481 . The first reflective element 41 may be a plane mirror (plane mirror), but not limited thereto. The first to second light emitting elements (421, 422) may be ...

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 control system and a positioning method thereof. The optical touch control system is used for positioning an object in a touch control region and comprises a reflection element, two light emitting elements, a first light projection device, an image sensor and a processor, wherein the reflection element is arranged at a first side edge in the touch control region; the two light emitting elements are respectively arranged at a second side edge and a third side edge which are adjacent to each other in the touch control region; the third side edge is opposite to the first side edge; the first light projection device comprises a mirror plane and a light generator; the first light projection device is arranged at the first side edge and is adjacent to a fourth side edge in the touch control region; the image sensor is used for respectively capturing a first image and a second image when the light generator is shut down and started; and the processor is used for calculating coordinates of the object according to geometric data of an image and a mirror image of the object in the first image or the second image.

Description

technical field [0001] The present invention relates to an optical touch system and its positioning method, in particular to an optical touch system and its positioning method that uses a light projection device that can select self-illumination and reflective external light to solve the blind zone problem. Background technique [0002] A touchscreen device is a device that allows users to interact with applications directly on the screen. There are various types of touch screen devices, among which the optical touch screen is a common one. [0003] figure 1 A conventional optical touch screen system 1 is shown, which is disclosed in US Pat. No. 4,782,328. like figure 1 As shown, the optical touch screen system 1 includes two sensors 11 for capturing images of objects 13 on the touch area 12 . The processor 14 is coupled to the two sensors 11 , and determines a sensing path 15 connecting the object 13 and the two sensors 11 by analyzing images generated by the two sensor...

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 Patents(China)
IPC IPC(8): G06F3/042
Inventor 苏宗敏林志新高铭璨
Owner PIXART IMAGING INC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com