Download Specifying Behavior and Semantic Meaning in

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
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)
SensAble PHANTOM
eccentric mass motor
grounded reflective-force
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Tactile Styli
Anoto Pen (by Logitech)
SensAble PHANTOM
eccentric mass motor
grounded reflective-force
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Tactile Styli
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Buzzing is sufficient for interaction
feedback.
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Impulse/High-Frequency forces
necessary to simulate clicks are
not possible.
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Lateral forces are unnatural.
Anoto Pen (by Logitech)
eccentric mass motor
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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
Haptic Behavior – a mapping of solenoid actions
to the states and transitions of an interaction.
Basic Click:
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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 Concepts
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Multi-function buttons
Input error feedback
Two-Click for mapping stylus single & double click
Stiff confirmation buttons
Toggle 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 Lee
[email protected]
Carnegie Mellon University
Mitsubishi Electric Research Labs
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Techno-mumbo-jumbo
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PIC16F876 with 10-bit A/D and 10-bit PWM
5mm force sensitive resistor (CUI SF-5)
16.1mm push-type solenoid (Guardian Electric)
Actuated mass: 26.7g
Supply Voltage: 20V
Min. Hold Continuous Current: < 1mA
Impulse Capacitor: 100F @ 20V
Min. Response Time: 5ms
Max. Energy: ~50mJ
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