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22-02-2009, 02:02 AM
Post: #1
Brick Virtual keyboard (Download Full Report And Abstract)
INTRODUCTION

Virtual Keyboard is just another example of todayâ„¢s computer trend of Ëœsmaller and fasterâ„¢. Computing is now not limited to desktops and laptops, it has found its way into mobile devices like palm tops and even cell phones. But what has not changed for the last 50 or so odd years is the input device, the good old QWERTY keyboard and the virtual keyboard technology is latest development.

The new virtual keyboard technology uses sensor technology and artificial intelligence to let users work on any surface as if it were a keyboard. Virtual Keyboards lets you easily create multilingual text content on almost any existing platform and output it directly to PDAs or even web pages. Virtual Keyboard, being a small, handy, well-designed and easy to use application, turns into a perfect solution for cross platform multilingual text input.

The main features are: platform-independent multilingual support for keyboard text input, built-in language layouts and settings, copy/paste etc. operations support just as in a regular text editor, already existing system language settings remain intact, easy and user-friendly interface and design, and small file size.



QWERTY KEYBOARDS

Inside the 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 amount of bounce and how to filter it.
¢ The speed at which to transmit the typematics.

The microprocessor and controller circuitry of a keyboard.

The key matrix is the grid of circuits underneath the keys. In all keyboards except for capacitive ones, each circuit is broken at the point below a specific key. Pressing the key, bridges the gap in the circuit, allowing a tiny amount of current to flow through. The processor monitors the key matrix for signs of continuity at any point on the grid. When it finds a circuit that is closed, it compares the location of that circuit on the key matrix to the character map in its ROM. The character map is basically a comparison chart for the processor that tells it what the key at x,y coordinates in the key matrix represents. If more than one key is pressed at the same time, the processor checks to see if that combination of keys has a designation in the character map. For example, pressing the Ëœaâ„¢ key by itself would result in a small letter "a" being sent to the computer. If you press and hold down the Shift key while pressing the Ëœaâ„¢ key, the processor compares that combination with the character map and produces a capital letter "A."

A different character map provided by the computer can supersede the character map in the keyboard. This is done quite often in languages whose characters do not have English equivalents. Also, there are utilities for changing the character map from the traditional QWERTY to DVORAK or another custom version.


A look at the key matrix.

Keyboards rely on switches that cause a change in the current flowing through the circuits in the keyboard. When the key presses the keyswitch against the circuit, there is usually a small amount of vibration between the surfaces, known as bounce. The processor in a keyboard recognizes that you pressing the key repeatedly do not cause this very rapid switching on and off. Therefore, it filters all of the tiny fluctuations out of the signal and treats it as a single keypress.



If you continue to hold down a key, the processor determines that you wish to send that character repeatedly to the computer. This is known as typematics. In this process, the delay between each instance of a character can normally be set in software, typically ranging from 30 characters per second (cps) to as few as two cps.


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18-05-2010, 10:32 PM
Post: #2
RE: Virtual keyboard (Download Full Report And Abstract)

.doc  Virtual keyboard.doc (Size: 23 KB / Downloads: 919)

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Virtual keyboard


Definition
A virtual keyboard is actually a key-in device, roughly a size of a fountain pen, which uses highly advanced laser technology, to project a full sized keyboard on to a flat surface. Since the invention of computers they had undergone rapid miniaturization. Disks and components grew smaller in size, but only component remained same for decades -its keyboard. Since miniaturization of a traditional keyboard is very difficult we go for virtual keyboard. Here, a camera tracks the finger movements of the typist to get the correct keystroke. A virtual keyboard is a keyboard that a user operates by typing on or within a wireless or optical -dectable surface or area rather than by depressing physical keys.

Since their invention, computers have undergone rapid miniaturization from being a 'space saver' to 'as tiny as your palm'. Disks and components grew smaller in size, but one component still remained the same for decades - it's the keyboard. Miniaturization of keyboard had proved nightmare for users. Users of PDAs and smart phones are annoyed by the tiny size of the keys. The new innovation Virtual Keyboard uses advanced technologies to project a full-sized computing key-board to any surface. This device has become the solution for mobile computer users who prefer to do touch-typing than cramping over tiny keys. Typing information into mobile devices usually feels about as natural as a linebacker riding a Big Wheel. Virtual Keyboard is a way to eliminate finger cramping. All that's needed to use the keyboard is a flat surface. Using laser technology, a bright red image of a keyboard is projected from a device such as a handheld. Detection technology based on optical recognition allows users to tap the images of the keys so the virtual keyboard behaves like a real one. It's designed to support any typing speed.

Keyboard

The part of the computer (also that of PDAs, smart phones etc.) that we come into most contact with is probably the piece that we think about the least. But the keyboard is an amazing piece of technology. For instance, did you know that the keyboard on a typical computer system is actually a computer itself?

Virtual Keyboard

A virtual keyboard is a keyboard that a user operates by typing (moving fingers) on or within a wireless or optical-detectable surface or area rather than by depressing physical keys. 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. With either approach, a virtual keyboard makes it possible for the user of a very small smart phone or a wearable computer to have full keyboard capability.

Theoretically, with either approach, the keyboard can be in space and the user can type by moving fingers through the air! The regular QWERTY keyboard layout is provided. All that's needed to use the keyboard is a flat surface. Using laser technology, a bright red image of a keyboard is projected from a device such as a handheld. Detection technology based on optical recognition allows users to tap the images of the keys so the virtual keyboard behaves like a real one. It's designed to support any typing speed. Several products have been developed that use virtual keyboard to mean a keyboard that has been put on a display screen as an image map. In some cases, the keyboard can be customized. Depending on the product, the user (who may be someone unable to use a regular keyboard) can use a touch screen or a mouse to select the keys.

Advantages Of Virtual Keyboard

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25-09-2010, 10:47 AM
Post: #3
RE: Virtual keyboard (Download Full Report And Abstract)

.xls  TQ-SPT.xls (Size: 142 KB / Downloads: 284)
More Info About Virtual keyboar

Astina M. Jones
President

6435 26th Street West
Bradenton, Florida 34207

abstract

No one cares about your business more than you do. But when you engage me and my Virtual Keyboard to take
on the tasks you don’t have time to do yourself, you engage someone who cares almost as much!
My goal is to help you care for your business by being a virtual extension of you in as many aspects as I can. Let me help
you take the load off, so you can spend time doing what you do best—running your business.
07-10-2010, 04:00 PM
Post: #4
RE: Virtual keyboard (Download Full Report And Abstract)

.ppt  virtualkeyboard.ppt (Size: 650.5 KB / Downloads: 605)
VIRTUAL KEYBOARD


Project By
T. Nageshwar Rao
MCA Final year
H.T.NO: 065-08-097
Guided by
SETU Software Systems Pvt. Ltd


Abstract


With the rapid spread of different languages content on the web, there is problem with input to local language search engines(ex:- http://www.setooz.com) .
By designing multi-language Virtual keyboard we are solving the problem of giving input to such local language search engines.
09-10-2010, 03:57 PM
Post: #5
RE: Virtual keyboard (Download Full Report And Abstract)
VIRTUAL KEYBOARD

abstract

A virtual keyboard is actually a key-in device, roughly a size of a fountain pen, which uses highly advanced laser technology, to project a full sized keyboard on to a flat surface. Since the invention of computers they had undergone rapid miniaturization. Disks and components grew smaller in size, but only component remained same for decades -its keyboard. Since miniaturization of a traditional keyboard is very difficult we go for virtual keyboard. Here, a camera tracks the finger movements of the typist to get the correct keystroke. A virtual keyboard is a keyboard that a user operates by typing on or within a wireless or optical -dectable surface or area rather than by depressing physical keys.

Since their invention, computers have undergone rapid miniaturization from being a 'space saver' to 'as tiny as your palm'. Disks and components grew smaller in size, but one component still remained the same for decades - it's the keyboard. Miniaturization of keyboard had proved nightmare for users. Users of PDAs and smart phones are annoyed by the tiny size of the keys. The new innovation Virtual Keyboard uses advanced technologies to project a full-sized computing key-board to any surface. This device has become the solution for mobile computer users who prefer to do touch-typing than cramping over tiny keys. Typing information into mobile devices usually feels about as natural as a linebacker riding a Big Wheel. Virtual Keyboard is a way to eliminate finger cramping. All that's needed to use the keyboard is a flat surface. Using laser technology, a bright red image of a keyboard is projected from a device such as a handheld. Detection technology based on optical recognition allows users to tap the images of the keys so the virtual keyboard behaves like a real one. It's designed to support any typing speed.


Keyboard
The part of the computer (also that of PDAs, smart phones etc.) that we come into most contact with is probably the piece that we think about the least. But the keyboard is an amazing piece of technology. For instance, did you know that the keyboard on a typical computer system is actually a computer itself?


Virtual Keyboard
A virtual keyboard is a keyboard that a user operates by typing (moving fingers) on or within a wireless or optical-detectable surface or area rather than by depressing physical keys. 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. With either approach, a virtual keyboard makes it possible for the user of a very small smart phone or a wearable computer to have full keyboard capability.

Theoretically, with either approach, the keyboard can be in space and the user can type by moving fingers through the air! The regular QWERTY keyboard layout is provided. All that's needed to use the keyboard is a flat surface. Using laser technology, a bright red image of a keyboard is projected from a device such as a handheld. Detection technology based on optical recognition allows users to tap the images of the keys so the virtual keyboard behaves like a real one. It's designed to support any typing speed. Several products have been developed that use virtual keyboard to mean a keyboard that has been put on a display screen as an image map. In some cases, the keyboard can be customized. Depending on the product, the user (who may be someone unable to use a regular keyboard) can use a touch screen or a mouse to select the keys.

Advantages Of Virtual Keyboard
• Portability
• Accuracy
• Speed of text entry
• Lack of need for flat or large typing surface
• Ability to minimize the risk for repetitive strain injuries
• Flexibility
• Keyboard layouts can be changed by software allowing for foreign or
• Alternative keyboard layouts.











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