A Brief Introduction to Virtual Laser Keyboard and it's Working Process

1. A Seminar on
VIRTUAL LASER KEYBOARD
Under the Supervision of
G. Guru Prasad
Assistant Prof.,
Department of ECE
Presented by
Pujari Ramesh
14121A04H1
IV YEAR ECE
1DEPARTMENT OF ECE

2. Contents
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• Introduction
• Inside Technology
• Need for Virtual Keyboard
• System Architecture
• Features
• Uses
• Pro’s and Con’s
• Future Scope and Implementations
• References
• Conclusion
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3. What is a Keyboard ?
• A Panel Of Keys that Operate a Computer or
Typewriter
How it Works..???
• When you press a key, the top and bottom
contact layers come together and the
keyboard sends a signal to the computer that
will be seen on the Display device
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4. Keyboard overview
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5. Inside keyboard
• The Processor in a keyboard has to understand
several things that are important to the utility
of the keyboard, such as....
– Position of the key in the matrix
– The Speed at which to transmit the Typematics
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6. Inside the Keyboard...
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7. What is Virtual ?
• Virtual
– Virtual means something that’s NOT REAL. Its only
the image (projection) of the real thing that one
can see.
– The Thing is that one can see the image like an
Orthogonal Object
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8. Introduction
• A Virtual Keyboard actually a Key-in Device,
roughly a size of fountain pen, which uses
highly advanced laser technology
• It is just another example of today’s Computer
trend of ‘smaller, smarter and Faster’.
• The New virtual Keyboard uses sensor
technology and artificial intelligence to let
user work on any surface as if it were a
keyboard.
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9. Introduction contd.,
• In virtual keyboard camera tracks the finger
movements of the typist to get the correct
keystroke
• The Software and Hardware part recognises
the typed character and pass it to the
computer
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10. Virtual keyboard Device
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11. VIRTUAL LASER KEYBOARD
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12. Need for Virtual Keyboard
• we can use it almost anywhere
Virtual Keyboard uses the infrared & laser technology
to project a full size keyboard onto any flat surface.
• Security of Passwords
Prevents our username or password from being stolen,
especially while using public computers, such as in internet
cafes . As the sequence of the keys can be changed every
time the page is refreshed. so they are useful from security
point of view in Banks, ATM’s
• It is not restricted to the QWERTY touch-typing paradigm
adjustments can be made to the software as such the
DVORAK keyboard
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13. Technology inside VLK...
The System Comprises of Three Modules
 Sensor Module
 IR-Light Source
 The Pattern Projector
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14. Overview of Device
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15. Sensor Module
• Serves as the Eye of
Keyboard perception
technology
• Operates by locating the
user’s fingers in 3-D
space and tracking the
intended keystrokes
• Keystroke information
processes and can then
be output to host 15
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16. IR-Light source
• Emits a beam of light
• Designed to Overlap the area on which the
keyboard pattern projector or printed image
resides
• Helps in Recognising the Hand Movements
and the pressing of keys
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17. Pattern Projector
• Projects the image of the keyboard
• Image can be projected on a flat surface
• The Projected image is that of a standard
QWERTY keyboard, with all the keys and
control functions as in the keyboard
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18. System Architecture
• 3-D Range Camera's is placed several cms over the
input surface, with a well-defined angle facing the
working area
• Size of the working area , limited by spatial resolution
of the camera i.e., 15 cm X 25 cm ,which is comparable
to a full-size laptop computer keyboard.
• Display Projector is mounted on the camera, facing the
same area which would generate the visual feedback
for the keyboard and input information
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19. Virtual Laser Keyboard System Overview
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20. How it Works ?
• Two Projections on to the flat surface in front
of the projector.
– One is laser projection ., Holographic , and a few
millimetre above that an invisible IR projection.
• When a key is pressed on the projection ,
IR Projection above the key is bounced back into
the projector that interprets from the angle which
key was actually computer either Bluetooth or
through a standard USB connector
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21. 21
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22. Process of Key Detection
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23. Features
• Can do work in darkness
• Wireless
• Compact size keyboard
• Rechargeable battery
• Allow the convenience full-size typing in tiny
factor
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24. Uses
• For those People who travel a lot, it is useful
to carry being small in size and lighter in
weight, even you can put in shirt’s pocket.
• Useful in hospitals where low noise is essential
• Gaming control and TV Remote controls
• To make note during smart classes, business
meeting and in library as no one will hear your
keying sound
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25. Pro’s and Con’s
• Pro’s
 Can be used in no
light areas
 Flexibility
 Speed
 Water proof
 High security
 Plug and use
• Con’s
 High cost
 Visible light may
distract laser light
 Hard to use for
beginners
 Flat surface
necessary
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26. Future Scope & Implementation
• Laser Keyboards Can be Embedded in ATM’s
• Can be used into space crafts as they are very
lighter and smaller
• Can be embedded into digital lockers into
banks, hostels for entering passwords and
digital door lockers based on passwords.
• Used in 6th Sense Technology device in which
it is not depends on the surface.
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27. 27
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28. References
1. http://www.smarttech.com
2. http://www.technologyreview.com/articles
3. http://www.laser-keyboard.com
4. http://www.innovationworks.org/portfolio/vi
rtuakeyboard
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29. Conclusion
• A Virtual Keyboard claim to provide the
CONVENIENCE AND COMPACTNESS with the
advantages of a QWERTY keyboard.
• It is purely based on the true-3D optical range
camera.
• Thus Virtual Keyboard will make typing Easier,
Faster and almost a pleasure.
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30. THANK YOU
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