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Survey of Current Braille Technologies. Team5 Steven Chao Kodai Ishikawa Daniel Olbrys Terry Pharaon Michael Wang. Current Braille Display technology . Various braille display technologies in the market: Non – Refreshable Printers Embossed paper braille 3D printing technology.

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survey of current braille technologies

Survey of Current Braille Technologies

Team5

Steven Chao

Kodai Ishikawa

Daniel Olbrys

Terry Pharaon

Michael Wang

current braille display technology
Current Braille Display technology

Various braille display technologies in the market:

Non – Refreshable

  • Printers
    • Embossed paper braille
    • 3D printing technology
current braille display technology1
Current Braille Display technology

Various braille display technologies in the market:

Refreshable

  • Piezoactuators
    • Electrical energy to linear motion
  • Wheel
    • Utilizes three electromagnets to adjust dot position
braille displays
Braille Displays
  • Braille Cells
  • Cursor Router Keys
  • Navigation Buttons
  • Perkins Style Keyboard
  • Scroll Wheel
braille displays1
Braille Displays
  • Perkins Style Keyboard
    • Dots 1:6
    • Enter, Backspace, Spacebar
  • Features (Standalone)
    • Word Processor
    • Book Reader
    • Web Browser and E-Mail

Apex BT 32 - $5495

braille display software
Braille Display Software
  • JAWS Screen Reading Software
    • Keyboard Shortcuts
    • Displays active window/menu
  • Braille Displays for iOS
    • Software Built-in
    • Bluetooth
    • VoiceOver
introduction to piezoelectricity
Introduction to Piezoelectricity
  • Mechanical Stress generates a voltage
  • Linear relationship
  • Inverse relationship
piezoelectric applications
Piezoelectric Applications
  • High voltage and power sources
  • Sensors
  • Motors
  • Actuators
piezo actuators
Piezo actuators
  • Applying voltage to piezoelectric causes deformation
  • High resolution, µm scale
  • Relatively short distance, not very effective for all uses
refreshable braille display
Refreshable Braille Display
  • A device that displays a line of Braille characters, generally 40-80 cells
  • Each dot is operated by a single piezo-crystal connected to a lever
  • Crystal expansion is small but powerful
  • This allows the display to output text files
analysis of piezo displays
Analysis of Piezo-Displays
  • High Cost ($1000 - $5000)
  • Individual pin cost is about $4
  • Virtually instantaneous refresh speed
  • Very high functionality
  • However, the high cost leaves a great deal of room for improvement
rotating wheel based refreshable braille display
Rotating-Wheel Based Refreshable Braille Display
  • Developed by National Institute of Standards and Technology (NIST)
  • Inverted method of operation
  • Utilizes three electromagnets to adjust dot position
  • Wheel is spun by small motor (adjustable speed)
  • Still in R&D phase, no commercial products yet (but patents exist)

http://academic.uprm.edu/pcaceres/Undergrad/PaperlessBraille/id18.htm

rotating wheel advantages
Rotating-Wheel Advantages
  • Expected to reduce cost by factor of more than 10x
  • Relatively small footprint (approx. CD player sized)
  • Mechanically very simple (robust)
  • Fast refresh rate (reset after completing one revolution)

http://www.google.it/patents/US20020045151

future display technology
Future Display technology

Non-available in the market:

  • Our Design
    • 3D Refreshable Tactile Display
  • Possible Improvements
    • Fast, more accurate, more durable and cheap.