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Multitouch input to touchpad derived form positive slope detection data

A slope and negative slope technology, applied in the field of detecting and tracking multiple objects that are touching its surface, can solve the problem of not being able to determine the pointing object

Active Publication Date: 2012-05-16
CIRQUE CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the touchpad circuitry 20, controlled by some microcontrollers 28, cannot yet determine which side of the row electrodes the pointing object is located, nor can the touchpad circuitry 20 determine how far the pointing object is located from the electrodes.

Method used

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  • Multitouch input to touchpad derived form positive slope detection data
  • Multitouch input to touchpad derived form positive slope detection data
  • Multitouch input to touchpad derived form positive slope detection data

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Embodiment Construction

[0021] The present invention will now be discussed with reference to the drawings to which reference numerals have been given to various elements of the invention to enable those skilled in the art to practice the invention. It is to be understood that the following description is merely exemplary of the principles of the invention and should not be taken as narrowing the scope of the appended claims.

[0022] image 3 is a graph showing data points collected from a touchpad in operation using the first embodiment of the invention. The system requires removing one X electrode and one Y electrode from the set of electrodes used to collect data from the touchpad. These two electrodes are then connected to ground through a capacitor. The electrodes are then driven and balanced by means of these electrodes coupled to grounded capacitors. When a finger is placed on the touchpad, the finger's only sensing is on that single driven electrode. When a finger is placed on the touchpad...

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Abstract

A method for using existing touchpad hardware to detect and track multiple objects such as fingers that are in contact with a touchpad, wherein the method extracts information from data that is already being collected, wherein analysis of the data is simplified by identifying objects by only looking for a positive slopes and negative slopes to identify multiple objects in data from the touchpad.

Description

[0001] Cross References to Related Applications [0002] This document claims priority from Provisional Patent Application Serial No. 61 / 186,792, Serial No. 4621.CIRQ.PR, and is hereby incorporated by reference for all subject matter contained therein. technical field [0003] The present invention generally relates to touchpads. More specifically, the present invention relates to a method of using data from a touchpad to detect and track multiple objects that are touching its surface. The present invention uses data already provided by the touchpad without requiring modifications to the touchpad hardware. Background technique [0004] Several designs of capacitive sensing touchpads exist. One of the existing touchpad designs that can be modified to be effective for the present invention is the Company-made touchpads. Therefore, it is very beneficial to investigate the underlying technology to better understand how all capacitive sensing touchpads can be modified to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F3/0416G06F3/044G06F3/04166G06F3/0446
Inventor 贾里德·C·希尔理查德·D·伍莱
Owner CIRQUE CORPORATION