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Tablet PC

Tablet PC . CSE 490 RA . Key features . Form factor Size Mobility Pen Input Natural Ink Stand Alone General Purpose . Tablet PC History . GRiDPad 1989 Go Pen point 1991 Pen Windows 1992 Newton 1993 Palm Pilot 1996 . Tablet PC Hardware Requirements . Digitizer

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Tablet PC

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  1. Tablet PC CSE 490 RA

  2. Key features • Form factor • Size • Mobility • Pen Input • Natural Ink • Stand Alone • General Purpose

  3. Tablet PC History • GRiDPad 1989 • Go Pen point 1991 • Pen Windows 1992 • Newton 1993 • Palm Pilot 1996

  4. Tablet PC Hardware Requirements • Digitizer • Detect Hovering Pen • Sample at least 100 times per second • Support resolution of 600 dpi • Two second resume from standby • Landscape to portrait without reboot • Ctrl-alt-del without keyboard

  5. Why might pen computing succeed? • Dramatic changes in hardware • Digitizers • CPU Speeds • Batteries • Digital Ink Recognition • This presentation was created without a keyboard on a turbulent airplane • Digital Ink treated as first class type

  6. TPC Software • Digital Ink Applications • Ink SDK • Tablet Input Panel • Computing without the keyboard • Extension of Windows XP • Must run windows apps

  7. Hardware landscape • Many vendors • Range of form factors • What about the keyboard? • Laptop plus vs. slate • Convertible • Acer, Toshiba • Detachable keyboard • HP/Compaq, motion computing

  8. Usability Studies • Pen UI vs. Conventional Widows UI • Ink as ink • User studies showed that often users do not convert to handwriting • Visual distinction for inkable regions • Input Modality • Do actions charge based on state • Many believe modeless UI’s are desirable

  9. Digitizer issues • Digitizer types • Resistive, single or double layer • Electro–static • Electro-magnetic • Digitizer distortion • Parallax

  10. Pen usability • Targeting • MS determined that .5cm is minimum • Many controls are smaller • Domains with much larger targeting range • Walking or talking • Bumpy airplane • Double click • Tap without drag • Hovering

  11. Pen Types • Magnetic or Battery powered • May have button • Some active at both ends • Supports natural eraser metaphor

  12. Handedness • Users hand blocks menu/cursor • Left vs. Right • Tablet PC controls take handedness into account • Control Panel /Tablet and Pen settings / settings

  13. Hover Tap Double Tap Press and Hold Hold through Drag Hold-Drag Lasso Gesture Pen Actions

  14. Gestures • Control actions associated with pen movements • InkCollector / InkOverlay provide gesture support • Recognized gestures fire event • Issues / risks • Hard to learn (as keyboard shortcuts) • Serious problem in accidental triggering

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