Thread Rating:
  • 1 Vote(s) - 3 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Virtual Laser Keyboards (Download PPT,Abstract,Report)
Post: #1

[Image: virtual-laser-keyboard-1.jpg]Without your computer keyboard, whether it's part of a desktop or a laptop, it might've been fairly difficult to get to this article. Sure, maybe you've bookmarked the Web site and you used your mouse to click around between several links, but most of the time, you probably type the Web site address into your browser to get here. Most of us with personal computers use a keyboard almost every day to compose e-mails, type out word processing documents, visit Web sites and perform searches. And as easy as it may seem, typing is a skill we have to learn and practice in order to perform properly. Most students take typing classes as early as elementary school, and word processing is one of the most common skills listed on a job-seeker's resume.

Without keyboards, communicating between family, friends and businesses would be a much less streamlined affair. Today, even smartphones come equipped with smaller keyboards. Phones that are more focused on e-mail and text messaging, like the BlackBerry or several of the slider phones, offer these as a more straightforward way of typing out text. On a typical cell phone with a three-by-four numeric keypad, for instance, where at least three letters are assigned to a number, you often have to punch through each key several times to get one word on the screen. Some people are remarkably adept at this -- just watch some people on a train or at the airport rifle through several text messages in a matter of no time -- but for some, the act is cumbersome and takes far too long. Miniature keyboards, however, attempt to solve that problem by giving users a complete QWERTY setup to type e-mails, text messages and reminders.

­But there's another problem. People with bigger fingers may find the keyboards on smartphones and PDAs too small. To make up for this, some manufactures have developed special virtual laser keyboards to accompany handheld devices. Instead of having to poke lightly around your phone's keyboard, a virtual laser keyboard connects to the phone and projects a full-sized virtual keyboard onto any flat surface. So how do they work?
Mechanics of Virtual Laser Keyboards
[Image: virtual-laser-keyboard-2.jpg]
Although virtual laser keyboards perform the same function as traditional keyboards, how they analyze and send information to another device is a different process.
Although virtual laser keyboards perform the same function as traditional keyboards, how they analyze and send information to another device is a different process.

­At their most basic, all keyboards, whether they're physical or virtual, are input devices -- once you type in a certain series of keystrokes, you're telling the keyboard to deliver a command to your computer. This allows you to write in a word-processing document, close out a program or write out a Web site's URL in a browser. But apart from the science-fiction element, what sets a virtual laser keyboard apart from a regular keyboard?

A traditional keyboard, one that hooks up to a desktop computer or is part of a laptop, is very much like another smaller computer. If you take it apart, it has a processor and circuitry similar to the insides of your computer. Underneath each key is a grid of circuits, and once you press a key, the switch closes. This sends a small electrical current through the grid, which the processor recognizes and analyzes. The processor, in turn, sends the information regarding your keystrokes to your computer, and it can do this several ways. Most desktop users connect their keyboard using cables, although common wireless technologies like Bluetooth let you type from a distance, as long as the computer has the necessary receiver. Laptop keyboards, on the other hand, connect directly to the computer's hardware.

When you type on a virtual laser keyboard, there aren't any switches involved. In fact, there aren't any mechanical moving parts at all. The device projects the image of a QWERTY keyboard onto a flat, non-reflective surface using a red diode laser. The laser, similar to the kind you see on those cheap laser pointers people wave at rock concerts, shines through a Diffractive Optical Element (DOE), which is simply a tiny image of the keyboard. The DOE, along with special optical lenses, expands the image to a usable size and projects it onto a surface.

But a simple image of a keyboard won't get you anywhere -- something needs to analyze the information you type in. Situated near the bottom of the device is an infrared (IR) laser diode, which shoots out a thin plane of infrared light. The plane, which is invisible and runs parallel to the surface, rests only millimeters above the image of the keyboard. When you start typing, you pass your fingers through certain areas of the infrared light. A CMOS (complimentary metal-oxide semiconductor) images your finger's position within the area of the keyboard, and a special sensor chip called a Virtual Interface Processing Core analyzes the location of the intended keystroke. The device then sends this information to the computer receiving the commands.

So how do you use a virtual laser keyboard?
Using Virtual Laser Keyboards
[Image: virtual-laser-keyboard-3.jpg]
If it sounds like a gadget from the future, a virtual laser keyboard sort of looks like one, too, especially when it's on full working display. They're small and sleek, weigh about two ounces (56.7 grams) and comparable in size to a pack of gum, so they can fit easily into pockets or carrying bags.
Virtual laser keyboards are small and portable, about the size of a pack of gum, and can slip into your pocket for easy use. Most are built to work with a variety of smartphones, PDAs and desktop and laptop setups.
Virtual laser keyboards are about the size of a pack of gum, and can slip into your pocket. Most work with a variety of smartphones, PDAs and desktop and laptop setups.

­But when it's time to use the virtual laser keyboard, the full science-fiction novelty comes into play. Most devices either stand up straight on a rectangular base or prop up with the help of a stand that flips out from the back. Once powered up, the keyboard can connect to a smartphone, PDA or laptop via USB cable or, more commonly, Bluetooth wireless technology. These two connection options allow the virtual laser keyboard to send keystroke information to a word processing document, e-mail or any other program in question.

Although they're small and convenient to carry around, you can't simply pull out the virtual laser keyboard and start typing away in any location. If you were sitting on the bus, for instance, and wanted to write a quick e-mail on your BlackBerry, you couldn't shine the device's red laser onto your lap and expect it to work properly. Virtual laser keyboards require flat, opaque and non-reflective surfaces for working projection and typing. Once you have the keyboard set up on the right type of surface, the device displays a full-size QWERTY keyboard, which typically contains 60 or more keys. Then you simply type just like you would on a normal keyboard, although the sensation you normally get when typing on a laptop or desktop -- the pops and clicks associated with the keystrokes punching up and down -- won't be there. In fact, it takes a little bit of practice for many users to become accustomed to pressing their fingers on a smooth surface.
Post: #2
thanks for the topic
Post: #3
can u pls send seminars report and ppt for virtual laser keyboard.please do the needful
Post: #4
plz send me abstract , ppt and docmumentation for this project.....
plz as fast as possible.....
Post: #5
can u please send the full document and ppt for virtual laser's very urgent please do the needful
Post: #6
good one and it is very useful for usHeart
Post: #7
Post: #8
hey...mail the virtual laser keyboard
Post: #9
hm hii dis is
virtual keyboard
Post: #10
please send me the documentation on above mentioned topic
Post: #11
send full report on vitual laser keyboard.
Post: #12
to get information about the topic Virtual Laser Keyboards full report ,ppt and related topic refer the link bellow
Post: #13
its realy goood seminars...
Post: #14
Thumbs Up 
i am satisfied frm ur report on virtual keybord
Post: #15
sir i want a ppt on this topic "virtual laser keyboard"..
plz send me abstract , ppt,pdf and docmumentation for this project.....
plz as fast as possible.....
Post: #16
how to download ppt's,abstract
Post: #17
Can U send me PPt , Report , Abstact about this topic Plz..
Post: #18
Post: #19
Post: #20
i want ppt on this topic
Post: #21
can u please send the full document and ppt for virtual laser keyboard.
Post: #22
ppt on virtual laser keyboard
Post: #23
i had seminars on 21st
i want to know about virtual laser keyboards
can u please send me the ppt and any related documents
thanking you
Post: #24
plz send me this ppt to my mail.tadimarriafsana[at]
Post: #25
thank u very much... pls i need seminars topics as soon as possible i need to submit ..

Important Note..!

If you are not satisfied with above reply ,..Please


So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page
Tagged Pages: nemadi garba song,
Popular Searches: deckblatt seminararbeit download, where is the abstract*, what abstract in, abstract expressionism spirituality, mp pmt pepar download, who is hera, abstract same as,

Quick Reply
Type your reply to this message here.

Image Verification
Image Verification
(case insensitive)
Please enter the text within the image on the left in to the text box below. This process is used to prevent automated posts.

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Optical Computer Full Seminar Report Download computer science crazy 43 34,284 29-04-2016 09:16 AM
Last Post: dhanyavp
  Digital Signature Full Seminar Report Download computer science crazy 20 14,047 16-09-2015 02:51 PM
Last Post: seminar report asees
  Steganography In Images (Download Seminar Report) Computer Science Clay 16 15,160 08-06-2015 03:26 PM
Last Post: seminar report asees
  Mobile Train Radio Communication ( Download Full Seminar Report ) computer science crazy 10 12,241 01-05-2015 03:36 PM
Last Post: seminar report asees
Heart wireless intelligent network(win) (Download Full Report And Abstract) computer science crazy 7 7,179 10-02-2015 05:52 PM
Last Post: seminar report asees
  VIRTUAL KEYBOARD A SEMINAR REPORT Computer Science Clay 17 22,424 25-01-2015 09:57 AM
Last Post: Beslanlox
  Image Processing & Compression Techniques (Download Full Seminar Report) Computer Science Clay 42 19,702 07-10-2014 07:57 PM
Last Post: seminar report asees
  Virtual keyboard computer science crazy 3 2,467 17-09-2014 10:23 PM
Last Post: seminar report asees
  IRIS SCANNING Full Seminar Report download Computer Science Clay 27 22,699 17-08-2014 05:49 PM
Last Post: ewpltnbbq
  Bluetooth Security Full Download Seminar Report and Paper Presentation computer science crazy 21 17,231 07-08-2014 11:32 PM
Last Post: [email protected]