Multiple point touch localization method

A technology of multi-touch and positioning method, which is applied in the direction of instruments, electrical digital data processing, and input/output process of data processing, etc. It can solve the problem of game response inconsistency, limit the application of touch screen, and fail to complete multiple simultaneous touch correct responses and other issues, to achieve the effect of a wide range of applications

Inactive Publication Date: 2008-01-16
GUANGDONG VTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although each person can use an independently predetermined portion of the touch screen while gaming, there will be many overlapping touches when each person operates their touch screen portion, which will cause the game response to be inconsistent with the wishes of one or more players
Although this situation could be improved by some methods, such as having individual dedi

Method used

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  • Multiple point touch localization method
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Examples

Experimental program
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Example Embodiment

[0039] According to the multi-touch positioning method of the present invention, for the touch screen system shown in Figure 1, when touch events 102 and 103 occur at the same time, the first touch event is recorded according to the difference in the occurrence time of touch events 102 and 103. The coordinates of the location are (x1, y1), register and save the touch point. When the second touch event is superimposed on the first touch event, the system will detect multiple sets of position coordinates (x1, x2, y1, y2) to determine that a new touch point has been added, by comparing the existing registration Point position coordinates (x1, y1), excluding the possibility of other coordinates (x1, y2), (x2, y1), and thus determine the newly added touch point coordinates as (x2, y2), so that two touches can be distinguished Points 102,103.

[0040] Similarly, for the touch screen system shown in FIG. 2, the two touch points 202 and 203 can be distinguished easily by applying the meth...

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Abstract

The invention provides a multi-point touch positioning method applied in touch screen systems, which contains the following steps: (a). Measure touch signals, judge signal changing situation, calculate touching location coordinates and/or shape and size of touch points; (b). judge signal-point or multi-point touch according to quantity change of location coordinates--if single-point touch, single point operations will be implemented by touch screen system, otherwise, turn to step (c); (c). determine whether there is any new touch points added or left or not by comparing quantity change of location coordinates and/or change of coordinate value. If there are new touch points added, register new touch points information and record location coordinates of new touch points. If there are touch points left, then clear those points information. The invention has wider application range but lower cost, and realizes multi-point touch positioning.

Description

technical field [0001] The invention relates to a touch positioning method used in an interactive display system, in particular to a multi-touch positioning method capable of distinguishing multiple touch points for simultaneous operation. Background technique [0002] At present, a touch screen has been widely used in many occasions and fields as an input device replacing or supplementing a common keyboard and mouse. In existing touch screens, the location detection technology for detecting the touch location can be based on different technologies, including infrared, camera, surface acoustic wave, etc. Users usually do not need to undergo special operation training, and only need to press the touch screen at the place marked by the relevant icon to implement a series of complex instructions. [0003] In order to calculate the position where the touch event occurs, the touch screen system generally determines the touch position by measuring the change of the output signal ...

Claims

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Application Information

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IPC IPC(8): G06F3/041G06F3/042
CPCG06F3/0416
Inventor 卢如西周春景李军明
Owner GUANGDONG VTRON TECH CO LTD
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