haptic pen: a tactile feedback stylus for touch screens johnny c. lee 1,2 paul h. dietz 2 darren...
TRANSCRIPT
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Haptic Pen: A Tactile Feedback Stylus for Touch Screens
Johnny C. Lee1,2
Paul H. Dietz2
Darren Leigh2
William S. Yerazunis2
Scott E. Hudson1
1Carnegie Mellon University
2Mitsubishi Electric Research Labs
Santa Fe, NM UIST 2004
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Last Year…
[Poupyrev and Maruyama, UIST 2003]
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Our Goals:Support large touch-sensitive displays.Support multiple simultaneous users.
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Our Goals:Support large touch-sensitive displays.Support multiple simultaneous users.
Our Solution:Haptic Pen
- Feedback not tied to display- Individualized feedback- Pressure Sensitivity- Non-Contact Location data- Low-cost
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Prototype Implementation
External control board and power supply. RS-232 interface to PC. Components in prototype cost ~$10.
Diamond Touch Interface [Dietz, UIST’01]
- DT is a Multi-user front-projected touch table
- Haptic Pen is location technology agnostic
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Tactile Styli
Anoto Pen (by Logitech)
eccentric mass motor
SensAble PHANTOM
grounded reflective-force
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Tactile Styli
Anoto Pen (by Logitech)
eccentric mass motor
SensAble PHANTOM
grounded reflective-force
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Tactile Styli
Anoto Pen (by Logitech)
eccentric mass motor
• Buzzing is sufficient for interaction feedback.
• Impulse/High-Frequency forces necessary to simulate clicks are not possible.
• Lateral forces are unnatural.
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Force Vectors
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Force Vectors
Longitudinal
Lateral
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Longitudinal Force
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Longitudinal Force
along same force vector
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Lateral Force
lateral force is unnatural
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Accelerometer Comparison
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Solenoid Actions
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Haptic Behaviors
Basic Click:
Haptic Behavior – a mapping of solenoid actions to the states and transitions of an interaction.
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Haptic Behaviors for Buttons
No Click – No feedback, primarily for control comparison
Light Click – Light threshold, weak feedback (“ballpoint pen”)
Basic Click – Medium threshold, medium feedback
Hard Click – High threshold, strong feedback (“punch tool”)
Buzz – Fixed strength buzz when pressed (“error”)
Force Buzz – Proportional strength buzz (“dentist”)
Two-Click – Two level button (“camera shutter”)
Buzz-Click – Two level button (“test and confirm”)
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Interaction ConceptsMulti-function buttons Input error feedbackTwo-Click for mapping stylus single & double
clickStiff confirmation buttonsToggle switches – Light Click on, Hard Click off
Data Peeking – stiffness driven by hidden variable
Tactile Alerts – Continuous contact with user
Targeting – buzzing driven by proximity, region, or direction.
More in the paper…
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Off the Screen
Haptic Pen + Anoto Tracking =Drawable Tactile Interfaces
3D tracking allows tactile feedback on any registered surface.
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Future Directions
Develop more robust and compact prototypes and explore a wireless implementation
Explore tasks which have the greatest potential for improvement in performance and user satisfaction
Develop hardware and software technologies for multi-user tactile applications
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Thanks for coming to UIST 2004!
Johnny Chung [email protected] Mellon UniversityMitsubishi Electric Research Labs
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Techno-mumbo-jumbo
PIC16F876 with 10-bit A/D and 10-bit PWM5mm force sensitive resistor (CUI SF-5)
16.1mm push-type solenoid (Guardian Electric)
Actuated mass: 26.7gSupply Voltage: 20VMin. Hold Continuous Current: < 1mA Impulse Capacitor: 100F @ 20VMin. Response Time: 5msMax. Energy: ~50mJ