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Methods for detecting and tracking touch objects

A touch point and touch sensing technology, applied in the input/output of user/computer interaction, the input/output process of data processing, instruments, etc., can solve the problems of complicated equipment assembly and increased cost

Inactive Publication Date: 2012-11-14
RPO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hardware changes often require additional components, which add cost and complicate device assembly

Method used

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  • Methods for detecting and tracking touch objects
  • Methods for detecting and tracking touch objects
  • Methods for detecting and tracking touch objects

Examples

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Embodiment Construction

[0043] In this section, we will describe various "software" or "firmware" methods for enhancing the multi-touch capabilities of infrared touchscreens without requiring additional hardware components. For convenience, "dual-touch blurring" and "occlusion issues" will be described as separate aspects of multi-touch capability. By way of example only, reference will be made to Figure 4 An infrared touch screen of the kind shown describes the method of the present invention, where the sensed light is in the form of two layers of orthogonal light directed towards multiple rows of receiving waveguides. While many of these approaches are generally applicable to infrared touchscreens, optical touchscreens, SAW touchscreens, and projected capacitive touchscreens are also applicable, with possible minor modifications that would occur to those skilled in the art. These methods will be described with respect to the resolution of double touch events, however it will be understood that th...

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Abstract

In a touch sensitive user interface environment having a series of possible touch points on an activation surface, with the monitoring of the touch points being achieved by sensing activation values at a plurality of positions around the periphery of the activation surface, a method of determining where at least one touch point has been activated on the surface, the method including the steps of: (a) determining at least one intensity variation in the activation values; and (b) utilising a gradient measure of the sides of the at least one intensity variation to determine the location of at least one touch point on the activation surface.

Description

technical field [0001] The present invention relates to methods for detecting and tracking objects interacting with a touch screen. The present invention was developed mainly to improve the multi-touch capability of an infrared touch screen, and the present invention will be described below with respect to this application. It will be understood, however, that the invention is not limited to this particular field of use. [0002] related application [0003] This application claims priority to Australian Provisional Patent Application No. 2009905037, filed 16 October 2009, and U.S. Provisional Patent Application No. 61 / 286,525, filed 15 December 2009, the contents of which are incorporated by reference This article. Background technique [0004] In no way should any discussion of prior art throughout this specification be taken as an admission that such prior art is widely known or forms part of the common general concepts in the field. [0005] Touch-sensing based input...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F2203/04104G06F3/04817G06F3/0428G06F3/0487G06F3/0418G06F3/0421G06F3/03G06F3/042
Inventor 安德鲁·克莱纳特理查德·普拉德纳斯迈克尔·班特尔达克斯·库库利
Owner RPO