VIRTUAL KEYBOARD

Presented by: G. Jaya Krishna (10091a0535)

CONTENTS

Introduction

Qwerty keyboard

Virtual keyboard

Modules of Virtual keyboard

System Architecture

Advantages

Drawbacks

Applications

Conclusion

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.

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.

Qwerty keyboard

Key matrix

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.

Virtual keyboard

A virtual keyboard makes it possible for the user of a very small smart phone or a

wearable computer to have full keyboard capability.

Continue…

Modules of Virtual Keyboard

The Virtual Keyboard system comprises of three modules:-

The pattern projector

IR-light source

The sensor module

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.

System Architecture

Virtual-keyboard demonstration-system setup

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.

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.

Applications

High-tech and industrial Sectors.

Used with Smart phones.

As computer/PDA input.

Gaming control.

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.

THANK YOU……