skip to main content
10.1145/2470654.2466188acmconferencesArticle/Chapter ViewAbstractPublication PageschiConference Proceedingsconference-collections
research-article

LongPad: a touchpad using the entire area below the keyboard of a laptop computer

Published: 27 April 2013 Publication History

Abstract

In this paper, we explore the possibility of a long touchpad that utilizes the entire area below the keyboard of a laptop computer. An essential prerequisite for such a touchpad is a robust palm rejection method, which we satisfy using a proximity-sensing touchpad. We developed LongPad, a proximity-sensing optical touchpad that is as wide as a laptop keyboard, and implemented a palm rejection algorithm that utilizes proximity images from LongPad. In a user study conducted, we observed that LongPad rejected palm touches almost perfectly while participants were repeating typing and pointing tasks. We also summarize the new design space enabled by LongPad and demonstrate a few of the interaction techniques it facilitates.

Supplementary Material

suppl.mov (chi2157-file3.mp4)
Supplemental video

References

[1]
Annett, M., Grossman, T., Wigdor, D., and Fitzmaurice G., Medusa: a Proximity-Aware Multi-Touch tabletop. In Proc. UIST'11, 337--346.
[2]
Apple, Magic TrackPad. http://www.apple.com/magictrackpad/
[3]
Batra, S., Dykstra, D., Hsu, P., Radle, K., and Wiedenbeck, S., Pointing Device Performance for Laptop Computers. In Proc. Human Factors and Ergonomics Society Annual Meeting Oct. 1998, 42. 536--540.
[4]
Benko, H., Saponas, S., Morris, D., and Tan, D., Enhancing Input on and above the Interactive Surface with Muscle Sensing. In Proc. ITS '09, 93--100.
[5]
Bier, E., Stone, M., Pier, K., Buxton, W., and DeRose, T., Toolglass and Magic Lenses: the See-Through Interface. In proc. SIGGRAPH '93, 73--80.
[6]
Block, F. and Gellersen, H., Two-Handed Input in a Standard Configuration of Notebook with External Mouse. In proc. NordiCHI '10, 62--71.
[7]
Butler, C. and Amant, R., HabilisDraw DT: a Bimanual Tool-Based Direct Manipulation Drawing Environment. In proc. CHI '04 Ext. Abstracts, 1301--1304.
[8]
Buxton, W. and Myers, B., A Study in Two-Handed Input, In proc. CHI '86, 321- 326.
[9]
Choi, S., Gu, J., Han, J., and Lee, G., Area Gestures for a Laptop Computer Enabled by a Hover-Tracking Touchpad. In Proc. APCHI'12, 119--124.
[10]
Choi, S., Han, J., Lee, G., Lee, N., and Lee, W., RemoteTouch: Touch-Screen-like Interaction in the TV Viewing Environment. In proc. CHI '11, 393--402.
[11]
Davidson, P. L. and Han, J. Y., Extending 2D Object Arrangement with Pressure-Sensitive Layering Cues, in proc. UIST '08, 87--90.
[12]
Epps, B. W., Comparison of Six Cursor Control Devices Based on Fitts' Law Models. In Proc. Human Factors and Ergonomics Society Annual Meeting Sept. 1986, 30, 327--331.
[13]
Guiard, Y., Asymmetric Division of Labor in Human Skilled Bimanual Action: The Kinematic Chain as a Model. Journal of Motor Behavior, 1987, 19, 486--517.
[14]
Hill, J., US Patent US 2011/0069021, 06.14.2010
[15]
Hilliges, O., Kim, D., and Izadi, S., Creating Malleable Interactive Surfaces Using Liquid Displacement Sensing. In proc. TABLETOP 2008, 157--160.
[16]
Hilliges, O., Izadi, S., Wilson, A. D., Hodges, S., Garcia-Mendoza, A., and Butz, A., Interactions in the Air: Adding Further Depth to Interactive Tabletops. In proc. UIST '09, 139--148.
[17]
Hodges, S., Izadi, S., Butler, A., Rrustemi, A., and Buxton, W., ThinSight: Versatile Multi-Touch Sensing for Thin Form-Factor Displays. In proc. UIST '07, 259268.
[18]
Hotelling, S., US Patent US 7561146 B1, 08.25.2004
[19]
Izadi, S., Hodges, S., Butler, A., West, D., Rrustemi, A., Molloy, M., and Buxton, W., ThinSight: a Thin FormFactor Interactive Surface Technology. Communications of ACM Dec. 2009, 52(12), 90--98.
[20]
Kelaher, D., Nay, T., Lawrence, B., Lamar, S., and Sommerich, C., An Investigation of the Effects of Touchpad Location within a Notebook Computer, Applied Ergonomics 2001, 32, 101--110.
[21]
Kremin, V., Ogirko, R., Pirogov, R., Ryshtun, A., and Vallis, D., US Patent US 2012/0105361 A1, 08.19.2011
[22]
Kurtenback, G., Fitzmaurice, G., Baudel, T., and Buxton, B., The Design of a GUI Paradigm Based on Tablets, Two-Hands, and Transparency. In proc. CHI '97, 35--42.
[23]
Lee, S., Buxton, W., and Smith, K., A Multi-Touch Three Dimensional Touch-Sensitive Tablet. In proc. CHI '85, 21--25.
[24]
Liu, S. and Guimbretière, F., FlexAura: a Flexible NearSurface Range Sensor. In proc. UIST '12, 327--330.
[25]
Malik, S. and Laszlo, J., Visual Touchpad: A TwoHanded Gestural Input Device. In proc. ICMI '04, 289296.
[26]
Marquardt, N., Jota, R., Greenberg, S., and Jorge, J., The Continuous Interaction Space: Interaction Techniques Unifying Touch and Gesture on and above a Digital Surface. In proc. INTERACT 2011, 461--476.
[27]
Moeller, J. and Kerne, A., ZeroTouch: an Optical MultiTouch and free-air interaction architecture. In proc. CHI '12, 2165--2174.
[28]
Rekimoto, J., SmartSkin: an Infrastructure for Freehand Manipulation on Interactive Surfaces. In proc. CHI '02, 113--120.
[29]
Rosenberg, I. and Perlin, K., The UnMousePad: an Interpolating Multi-Touch Force-Sensing Input Pad. In proc. SIGGRAPH '09, 65.
[30]
Sugiura, A. and Koseki, Y., A User Interface Using Fingerprint Recognition: Holding Commands and Data Objects on Fingers. In proc. UIST '98, 71--79.
[31]
Sutter, C. and M. Ziefle., How to Handle Notebook Input Devices: An Insight in Button Use Strategy. Contemporary Ergonomics 2003, 241--246.
[32]
Sutter, C. and M. Ziefle., Interacting with Notebook Input Devices: An Analysis of Motor Performance and Users' Expertise, Human Factors: The Journal of the Human Factors and Ergonomics Society Spring 2005, 47, 169--187.
[33]
Sutter, C., and M. Ziefle., Psychomotor Efficiency in Users of Notebook Input Devices: Confirmation and Restrictions of Fitts' Law as an Evaluative Tool for User-friendly Design. In proc. Human Factors and Ergonomics Society Annual Meeting, Sep. 2004, 48, 773--777.
[34]
Sutter, C., M. Ziefle, H. Luczak, and K. J. Zink. Health Hazard from Input Devices: The Diagnostics of Muscular Load and Motor Performance Revisited. Human Factors in Organizational Design and Management 2003, 525--530.
[35]
TactaPad, http://www.tactiva.com/tactapad.html
[36]
Westerman, W. Hand Tracking, Finger Identification, and Chordic Manipulation on a Multi-Touch Surface. PhD thesis University of Delaware 1999.
[37]
Yee, K., Two-handed Interaction on a Tablet Display. In proc. CHI'04 Ext. Abstracts, 1493--1496.

Cited By

View all

Index Terms

  1. LongPad: a touchpad using the entire area below the keyboard of a laptop computer

    Recommendations

    Comments

    Information & Contributors

    Information

    Published In

    cover image ACM Conferences
    CHI '13: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
    April 2013
    3550 pages
    ISBN:9781450318990
    DOI:10.1145/2470654
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

    Sponsors

    Publisher

    Association for Computing Machinery

    New York, NY, United States

    Publication History

    Published: 27 April 2013

    Permissions

    Request permissions for this article.

    Check for updates

    Author Tags

    1. bimanual interaction
    2. longpad
    3. palm rejection
    4. per-finger force sensing
    5. proximity-sensing

    Qualifiers

    • Research-article

    Conference

    CHI '13
    Sponsor:

    Acceptance Rates

    CHI '13 Paper Acceptance Rate 392 of 1,963 submissions, 20%;
    Overall Acceptance Rate 6,199 of 26,314 submissions, 24%

    Upcoming Conference

    CHI 2025
    ACM CHI Conference on Human Factors in Computing Systems
    April 26 - May 1, 2025
    Yokohama , Japan

    Contributors

    Other Metrics

    Bibliometrics & Citations

    Bibliometrics

    Article Metrics

    • Downloads (Last 12 months)42
    • Downloads (Last 6 weeks)4
    Reflects downloads up to 03 Jan 2025

    Other Metrics

    Citations

    Cited By

    View all

    View Options

    Login options

    View options

    PDF

    View or Download as a PDF file.

    PDF

    eReader

    View online with eReader.

    eReader

    Media

    Figures

    Other

    Tables

    Share

    Share

    Share this Publication link

    Share on social media