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 KEYBOARDQWERTY 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 KEYBOARDThe processor in a keyboard has to understandseveral things that are important to the utility of thekeyboard, 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 todays 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-sizedcomputer keyboard onto almost any surface, anddisappears when not in use.The device detects movement when fingers arepressed 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 users 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.
AdvantagesPortabilitySpeed 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.