Virtual Keyboards: 5 Fast Facts

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Fact #1. Virtual keyboards work using lasers. Specifically, red diode lasers. The light shines through a diffractive optical element. This is basically a tiny image of a keyboard. Special lenses expand the image. This creates a projection of a full-size keyboard. Infrared detection sensors keep track of the movement of your fingers.
Fact #2. Virtual keyboards can help you travel light. Small keyboards are difficult to type on. But larger ones are bulky and inconvenient to carry around. Virtual models have the best of both worlds. The physical device is small enough to fit in a pocket or purse. But the layout of the keys is big enough to type on comfortably.
Fact #3. There are many factors to keep in mind when choosing which model to buy. Battery life is important. A keyboard with lithium polymer batteries can run for 2-3 hours. Brightness control is a good feature too. Especially if you're typing throughout the day. Finally, there's speed. You need to make sure that your keyboard can keep up with your fingers.
Fact #4. Most virtual keyboards use the QWERTY layout. It can be traced back to the early 1870s. Christopher Sholes, a newspaper editor, created it. Over the years, it has changed slightly. But QWERTY is still the most common keyboard layout for Latin script.
Fact #5. The optical virtual keyboard was invented in 1992. IBM created and patented the technology. Canesta was the first to apply this technology in 2002. Since then, several companies have created their own versions. And this technology presents many possibilities that have yet to be explored.