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Electrode for Distinguishing Capacitive Button Activation

IP.com Disclosure Number: IPCOM000171097D
Publication Date: 2008-May-28
Document File: 2 page(s) / 25K

Publishing Venue

The IP.com Prior Art Database

Related People

Tim Wang: INVENTOR

Abstract

This invention deals with implementing an electrode underneath a mechanical joystick to prevent accidental capacitive button activation. This “guard” electrode could also use proximity sensing to detect when a finger is approaching the mechanical joystick

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Two Region, Two Finger Touchpad Kipling Inscore

Electrode for Distinguishing Capacitive Button Activation

1. Inventor(s): Tim Wang
2. Synaptics Incorporated, Santa Clara, CA, USA

3. Short Summary

Figure 1. Sample case where invention can be implemented. Blue dots indicate locations of capacitive buttons while red dots indicate locations of a mechanical joystick

This invention deals with implementing an electrode underneath a mechanical joystick to prevent accidental capacitive button activation. This "guard" electrode could also use proximity sensing to detect when a finger is approaching the mechanical joystick

4. Some Problems Solved

Figure 1 shows a sample design. Since the mechanical portion is very close to the capacitive buttons, users can unintentionally activate the capacitive buttons. The proposed guard electrode will prevent this unintentional activation from occurring.

Copyright © 2008 Synaptics Incorporated, All Rights Reserved. Page: 1 of 2

Information contained in this publication is provided as-is, with no express or implied warranties, including any warranty of merchantability, fitness for any particular purpose, or non-infringement. Synaptics Incorporated assumes no liability whatsoever for any use of the information contained herein, including any liability for intellectual property infringement. This publication conveys no express or implied licenses to any intellectual property rights belonging to Synaptics or any other party. Synaptics may, from time to time and at its sole option, update the information contained herein without notice.

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Two Regio...