Virtual keyboard
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Transcript of Virtual keyboard
VIRTUAL KEYBOARD
A Virtual Keyboard is a form of computer input device whereby the image of a keyboard is projected onto a surface.
When a user touches the surface covered by an image of a key, the device records the corresponding keystroke.
VIRTUAL KEYBOARD
An optical virtual keyboard was invented and patented by IBM Engineers in 1992. It optically detects & analyses finger motions and interprets them. In 2002,CANESTA developed a virtual
keyboard using their proprietary "electronic perception technology". The company subsequently licensed the technology to Celluon of Korea.
VIRTUAL KEYBOARDVIRTUAL KEYBOARD
It takes up less desk space than a conventional keyboard.
Can be used with Smart phones, PDAs, Laptop, Palmtop.
When connected to your handheld computer it is more convenient to carry around than your laptop.
WHY VIRTUAL KEYBOARD…???
This System Comprises Of 3 Components
SensorPattern Projector IR Light
COMPONENTS
The working of virtual keyboard can be explained in 3 modules.
Projection ModuleMicro-Illumination ModuleSensor Module
HOW IT WORKS…??
HOW IT WORKS…??
A template is created of the desired interface and is projected onto the adjacent interface surface .
This template is produced by illuminating a specially designed highly efficient holographic optical element with a red diode laser
PROJECTION MODULE
An infra-red plane of light is generated just above, and parallel to the interface surface.
This light is invisible to the user and hovers a few millimeters above the surface.
When the user's finger makes a keystroke on the virtual keyboard, it breaks the infrared beam and reflects light back to the projector.
MICRO-ILLUMINATION MODULE
Reflected light from user interactions with the interface surface is passed through an infra-red filter and imaged onto a CMOS image sensor in the sensor module.
Simply, sensor in the projector picks up finger movements of the user
SENSOR MODULE
Virtual keyboards can be connected to the computer either through Bluetooth or USB.
Bluetooth technology also enables the virtual keyboard for point to multi-point connectivity with other Bluetooth devices, such as PCs, PDAs and Mobile Phones.
CONNECTIVITY
Portability Accuracy Speed of text entry Flexibility Keyboard layouts can be changed by
software Compatibility Occupies Less Space
ADVANTAGES
It is very costly ranging from 150$ to 200$. Requires little practice. The room in which the projected keyboard is
used should not be very bright so that the keyboard is properly visible.
Relatively poor Battery Life. The keyboard utility depends entirely on the
surface on which it is located.
DISADVANTAGES
High-Tech and Industrial Sectors. Used with PDAs, Smart Phones, Laptop,
Word Processing and Spreadsheets As Computer/PDA input Gaming Control
APPLICATIONS
In the near future all the input devices will be changed from conventional to virtual devices.
It can be also used in 6th Sense Technology Device and even with 3D Glasses.
CONCLUSION
THANK YOU