Introduction:
Communication Technology is rapidly increasing in this modern world. Computer, as every body knows, is the main communication machine used. Since the time computer has been invented scientists and engineers have been trying making it more and more compact. As a result we have been able to enjoy the numerous functionalities provided by the computers whether it is Home PCs or Laptops. Systems have still been reduced so that they are used in Mobiles I-pods and I-phones have replaced the laptops to an extent. It is in this context that Pen Computers come into spot light. These are computers in the shape of different pens each having a function of its own and when combined together give us the usage of a full-blown computer. It is a computer broken apart into pieces, each the size of a pen. The screen and keyboard are projected onto surfaces.
P-ISM:
"P-ISM “Pen-style Personal Networking Gadget Package”.
P-ISM is a gadget package including five functions:
Block diagram of P-ISM is shown below
CPU pen:
The functionality of the CPU is done by one of the pen. It is also known as computing engine.
Communication pen:
P-ISMs are connected with one another through short-range wireless technology. The whole set is also connected to the Internet through the cellular phone function. They are connected through Tri-wireless modes (Bluetooth, 802.11B/G, and Cellular) which are made small and kept in a small pen like device.
Connectivity 802.11B/G and Bluetooth:
In fact, no-one expects much activity on 802.11n installations until the middle of 2008. “Rolling out 802.11n would mean a big upgrade for customers who already have full Wi-Fi coverage, and would be a complex add-on to existing wired networks, for those who haven't. Bluetooth is widely used because we can able to transfer data or make connections without wires. This is very effective because we can able to connect whenever we need without having wires. They are used at the frequency band of 2.4 GHz ISM (although they use different access mechanisms). Bluetooth mechanism is used for exchanging signal status information between two devices. This techniques have been developed that do not require communication between the two devices (such as Bluetooth’s Adaptive Frequency Hopping), the most efficient and comprehensive solution for the most serious problems can be accomplished by silicon vendors. They can implement information exchange capabilities within the designs of the Bluetooth. The circuit diagram for the 802.11B/G is given below. It is nothing but also type of Bluetooth. Using this connectivity we can also connect it with the internet and can access it anywhere in the world.
LED Projector:
The role of monitor is taken by LED Projector which projects on the screen. The size of the projector is of A4 size. It has the approximate resolution capacity of 1024 X 768. Thus it is gives more clarity and good picture.
Virtual Keyboard:
The Virtual Laser Keyboard (VKB) is the ULTIMATE new gadget for PC users. The VKB emits laser on to the desk where it looks like the keyboard having QWERTY arrangement of keys i.e., it uses a laser beam to generate a full-size perfectly operating laser keyboard that smoothly connects to of PC and Most of the handheld devices (PDA's, tablet PC's). The I-Tech laser keyboard acts exactly like any other "ordinary" keyboard: A direction technology based on an optical recognition mechanism enables the user to tap on the projected key images, while producing real tapping sounds (we call it the WOW effect). It is more compatible and it did not require any practice to operate but you must have strong fingers to tap. The I-Tech Virtual Keyboard uses a light projection of a full-sized computer keyboard on almost any surface. Used with PDA's and Smart Phones, the Virtual Keyboard provides a practical way to do e-mail, word processing and spreadsheet tasks, enabling users to leave laptops and computers at home. VKB's adaptable technology studies the user's finger movements to interpret and record keystrokes. Because the virtual keyboard is an image projected by light, it disappears completely when not in use.
Features of virtual keyboards are:
Cellular Telephones, Space saving Computers, Laptops, Tablet PCs, Clean Rooms, Industrial Environments, Test Equipment, Sterile and Medical Environments, Transport (Air, Rail, Automotive).
VKB settings can be changed by Sound:
Controllable Virtual Keyboard sound effects (key clicks)
Connection: Connection to the appropriate Laptop/PC port
Intensity: Intensity of the projected Virtual Keyboard
Timeouts: coordinated timeouts to conserve the Virtual Keyboard's battery life
Sensitivity: adjustable sensitivity of the Virtual Keyboard
Auto-repeat: Allows the VKB to automatically repeat a key based on prescribed parameters.
Digital Camera:
We had digital camera in the shape of pen .It is useful in video recording, video conferencing, simply it is called as web cam. It is also connected with other devices through Bluetooth. The major advantage it is small which is easily portable. It is a 360-Degree Visual Communication Device. We have seen video phones hundreds of times in movies. However, why can't we act naturally in front of videophone cameras? Conventional visual communications at a distance have been limited due to the display devices and terminals. This terminal enables showing of the surrounding atmosphere and group-to-group communication with a round display and a central super-wide-angle camera.
Battery:
The most important part in the portable type of computer is its battery. Usually batteries must be small in size and work for longer time. It comes with a battery life of 6+. For normal use it can be used for 2 weeks.
Conclusion:
The communication devices are becoming smaller and compact. This is only an example for the start of this new technology. We can expect more such developments in the future.
