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Keycap Redesign of Touch Sensitive Spacebar

IP.com Disclosure Number: IPCOM000248904D
Publication Date: 2017-Jan-20
Document File: 2 page(s) / 132K

Publishing Venue

The IP.com Prior Art Database

Related People

Justin Mockler: INVENTOR [+2]

Abstract

Users may contact a top-front edge of a keycap of a capacitive touch sensitive spacebar rather than directly the top of the keycap, which may have some effects on a touch sensor's performance of the spacebar. A keycap redesign is considered to mitigate such effects related to sensor recognition and also to improve the accuracy, speed, or comfort of the spacebar with a redesigned keycap.

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Keycap Redesign of Touch Sensitive Spacebar Justin Mockler

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.

Keycap Redesign of Touch Sensitive Spacebar

1. Inventor(s): Justin Mockler and Eric Faggin

2. Synaptics Incorporated, San Jose, CA, USA

3. Short Summary

Users may contact a top-front edge of a keycap of a capacitive touch sensitive spacebar rather than

directly the top of the keycap, which may have some effects on a touch sensor’s performance of the

spacebar. A keycap redesign is considered to mitigate such effects related to sensor recognition and also

to improve the accuracy, speed, or comfort of the spacebar with a redesigned keycap.

Overall, of the styles tested, a rounded keycap with a -8 degree slope would be the most preferred and

would provide the best recognition rate. Specifically, the recognition error rate would be reduced from

6.2% using the original keycap design to 0.6% using the best performing keycap design. Other styles

and amounts of adjustment to the front edge of keycaps may be preferable in certain situations.

Additionally, while this is described primarily for use with a space bar keycap, keycaps for any other

keycap may be modified in similar way to improve touch performance.

4. Technological advantages

This indicates that it would be possible to make the touch sensor perform better by only adjusting the

design of the keycap. Performance may be further increased by looking at how to adapt the sensor better

for the specific keycap design.

5. General Description

Figure 1. Variations of keycap designs

Five spacebars are considered here and were manufactured using 3d printing for testing. The geometries

of the spacebars are designed to match the back, front, and side edge slopes of the original spacebar

Keycap Redesign of Touch Sensitive Spacebar Justin Mockler

Copyright © 2017 Synaptics Incorporated, All Rights Reserved. Page: 2 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 b...