Browse Prior Art Database

Grip Based Side Touch Object Extraction

IP.com Disclosure Number: IPCOM000249404D
Publication Date: 2017-Feb-23
Document File: 2 page(s) / 82K

Publishing Venue

The IP.com Prior Art Database

Related People

Tetsuo Tanemura: INVENTOR

Abstract

Side touch signal response, due to its sensing surface significantly away from and not laid over electrodes, can be as small as few femtofarads in magnitude, and this results in increased probability of false positives/negatives in light of numerous interference. The invention attempts to reduce this probability on the premise where user can initiate side touch action only after the device is held in hand first. Specifically, grip is detected first, and depending on the type of grip being classified, acceptable side touch zone is restricted and signal thresholds are also adjusted, optimally for each grip type.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 52% of the total text.

Grip Based Side Touch Object Extraction Tetsuo Tanemura

Copyright © 2017 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.

Grip Based Side Touch Object Extraction

1. Inventor(s): Tetsuo Tanemura

2. Synaptics Incorporated, San Jose, CA, USA

3. Short Summary

Side touch signal response, due to its sensing surface significantly away from and not laid over

electrodes, can be as small as few femtofarads in magnitude, and this results in increased probability of

false positives/negatives in light of numerous interference.

The invention attempts to reduce this probability on the premise where user can initiateside touchaction

only after the device is held in hand first. Specifically, grip is detected first, and depending on the type

of grip being classified,acceptableside touch zone is restricted and signal thresholds are also adjusted,

optimally for each grip type.

4. Some Problems Solved

Examples of some of the problems addressed by the invention include:

In past implementations, there has been independent measures to mitigate false positives/negatives that

could be tuned manually. No distinction is made, however, from one grip type to another, and rather

grip in its entirety was treated simply as a source of intrinsic interference which must be rejected. As

grip response does not remain static and changes with a motion of intended side touch finger as well as

during transient state of gripping and un-gripping, it can cause false positives in the location where part

of this grip hand is in contact. Setting explicit exclusion zone within which side touch action is ignored

has been effective to some extent here but is prone to more false negatives if the zone is increased or,

conversely, more false positives if the zone is reduced, naturally because the optimal setting for each

grip type is different. Upper and lower signal thresholds within which response should be registered as

side touch object is also different from one grip type to another, which also is not considered previously.

5. General Description

In this invention, grip is not treated as another source of interference, but rather as a trigger to enable

and set criteria for side touch object anticipated in subsequent report frames. Flowchart shown in Figure

1 describes the bulk of this invention, where only after the grip is detected and classified, side touch

object determ...