The document discusses virtual keyboards, which project a keyboard onto any surface that can be typed on. It describes the components of a virtual keyboard system, including a pattern projector, IR light source, and sensor module. Virtual keyboards allow users to type on small devices like phones or wearable computers. While costly and requiring practice, virtual keyboards are portable and can benefit injured users. They are used in industrial, smartphone, computer and gaming applications.

1. VIRTUAL KEYBOARD

2. Presented by:
G. Jaya Krishna
(10091a0535)

3. Introduction
Qwerty keyboard
Virtual keyboard
Modules of Virtual keyboard
System Architecture
Advantages
Drawbacks
Applications
Conclusion

4. Introduction
 A virtual keyboard is a projection keyboard that is projected and touched on
any surface.
 In a virtual keyboard, camera tracks the finger movements of the typist to get
the correct keystroke.
 The software and hardware part recognizes the typed characters and pass it
to the computer.

5. Qwerty keyboard
 QWERTY is the most common keyboard layout on English-language
computer.
 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 key matrix.
 The amount of bounce and how to filter it.
Key matrix

6. Virtual keyboard
 Virtual Keyboard is just another example of today’s computer trend of
"smaller and faster“.
 Virtual Keyboard uses sensor technology to let users work on any surface
as if it were a keyboard.
 The keyboard is projected optically on a flat surface and, as the user
touches the image of a key, the optical device detects the stroke and sends
it to the computer.

7.  A virtual keyboard makes it possible for the user of a very small smart phone or a
wearable computer to have full keyboard capability.
Virtual keyboard
Continue…

8. Modules of Virtual Keyboard
The Virtual Keyboard system comprises of three modules:-
 The pattern projector
 IR-light source
 The sensor module

9. Technologies used:
 In one technology, the keyboard is projected optically on a flat surface and,
as the user touches the image of a key, the optical device detects the stroke
and sends it to the computer.
 In another technology, the keyboard is projected on an area and selected
keys are transmitted as wireless signals using the short-range Bluetooth
technology.

10. System Architecture
Virtual-keyboard demonstration-system
setup

11. Advantages
 Portability
 Injured people can also use.
 If the keyboard on your device is smaller than you care for then the Virtual
Keyboard is a good choice
 No driver software necessary, It can be used as a plug and play device.
 Takes less desk space then a conventional keyboard.

12. Drawbacks
 It is very costly.
 The room in which the virtual keyboard is used should not be very bright so
that the keyboard is properly visible.
 Virtual keyboard is hard to get used to. Since it involves typing in thin air, it
requires a little practice. Only people who are good at typing can use virtual
keyboard efficiently.

13. Applications
 High-tech and industrial Sectors.
 Used with Smart phones.
 As computer/PDA input.
 Gaming control.

14. Conclusion
 Virtual keyboard uses sensor technology and artificial intelligence to let
users work on any surface as if it were a keyboard.
 Projection keyboards or virtual keyboard claim to provide the convenience
of compactness with the advantages of a QWERTY keyboard.