VIRTUAL KEYBOARD

Under The Guidance of,P.Sreenivasa Murthy(Ph.D) By,

G.Rakesh Reddy, 09R01A0522.

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.

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.

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

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.

The microprocessor and controller circuitry of a keyboard

A look at the key matrix.

VIRTUAL KEYBOARDVirtual 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.

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.

VIRTUAL KEYBOARD TECHNOLOGY

This system comprises of three modules:

1. The sensor module

2. IR-light source and

3. The pattern projector

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

• The Infrared Light Source emits a beam of infrared light .

• This helps in recognizing the hand movements and the pressing of keys .

• 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.

APPLICATIONS OF VIRTUAL KEYBOARDForeign character sets.

Touch screens.

Bypass key loggers.

Mobility impairments.

Advantages

PortabilitySpeed of text accuracyAlternative keyboard layoutsFlexibilityLack of need for flat or large typing space

Disadvantages of virtual keyboard Tactile feel

Space

Dirty screens

CONCLUSIONVirtual 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.

Thank you