The document discusses a virtual keyboard, which uses sensor technology and artificial intelligence to project a keyboard interface onto any surface. It can detect finger movements to register key presses without needing a physical keyboard. The virtual keyboard consists of a sensor module to track finger positions, an infrared light source, and a pattern projector to display the keyboard interface. It offers portability and flexibility compared to physical keyboards but lacks tactile feedback.

1. VIRTUAL KEYBOARD
Under The Guidance of,
P.Sreenivasa Murthy(Ph.D) By,
G.Rakesh Reddy,
09R01A0522.

2. INTRODUCTION
 A virtual keyboard is actually a key-in device, roughly a
size of a fountain pen, which uses highly advanced laser
technology.
 Virtual Keyboard is just another example of today’s
computer trend of ‘smaller and faster’.
 Many alternate forms like speech recognition, hand
writing recognition devices had come.
 The new virtual keyboard technology uses sensor
technology and artificial intelligence to let users work on
any surface as if it were a keyboard.

3.  The software and hardware part recognizes the
typed characters and pass it to the computer.
 Virtual Keyboard, being a small, handy, well-
designed and easy to use application, turns into a
perfect solution for cross platform multilingual text
input.

4. QWERTY KEYBOARD
QWERTY is the most common keyboard layout on
English-language computer and typewriter keyboards.
The most common keyboards are:
101-key Enhanced keyboard
104-key Windows keyboard
82-key Apple standard keyboard
108-key Apple Extended keyboard

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 key matrix.
The speed at which to transmit the typematics.

6. The microprocessor and controller circuitry of a keyboard
A look at the key matrix.

8. VIRTUAL KEYBOARD
Virtual keyboard is just another example of today's
computer trend of smaller and faster.
Virtual Keyboard uses sensor technology and artificial
intelligence to let users work on any surface as if it
were a keyboard.
Virtual Devices have developed a flashlight-size
gadget that projects an image of a keyboard on any
surface and let’s people input data by typing on the
image.

9. The Virtual Keyboard uses light to project a full-sized
computer keyboard onto almost any surface, and
disappears when not in use.
The device detects movement when fingers are
pressed down.

11. VIRTUAL KEYBOARD TECHNOLOGY
This system comprises of three modules:
1. The sensor module
2. IR-light source and
3. The pattern projector

12. • The Sensor Module operates by locating the user's
fingers in 3-D space and tracking the intended
keystrokes, or mouse movements.

13. • The Infrared Light Source emits a beam of infrared light .
• This helps in recognizing the hand movements and the
pressing of keys .

14. • This image can be projected on any flat surface.
• The projected image is that of a standard QWERTY keyboard,
with all the keys and control functions as in the keyboard.
• The Pattern Projector or optional printed image presents the
image of the keyboard or mouse zone of the system.

15. APPLICATIONS OF VIRTUAL KEYBOARD
Foreign character sets.
Touch screens.
Bypass key loggers.
Mobility impairments.

16. Advantages
Portability
Speed of text accuracy
Alternative keyboard layouts
Flexibility
Lack of need for flat or large typing space

17. Disadvantages of virtual keyboard
 Tactile feel
 Space
 Dirty screens

18. 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 full blown QWERTY keyboard.

19. Thank you