Touch screen software was initially used in kiosk systems,
POS terminals, ATM's and on PDA's. With raising popularity of smart phones,
modern PDA's, GPS's and portable game consoles, the demand for touch-screen
technologies slowly increased. Early touch-screen displays could only sense a
single point of input at a time and only a few of them were capable of
detecting the strength of the pressure.
This was changed with Apples ongoing commercialization of
the multi-touch technology with iPhone and iPod touch. Multi-touch allows the
user to interact with the screen with fingers, instead of a stylus. The
movement of fingers creates gestures, which are then sent to the touch screen
software. Popularity of iPhone, has brought touch-screen technology to many smart
phones and hand-held devices.
Many companies have upgraded their products, either by
adding a multi/touch support to the track-pad or by making their Tablet PC's
interact-able without the stylus. Some companies specialize in production of
large wall-mounted or table surfaces. Most notable are Microsoft's Surface and
Perceptive Pixel's Multi-Touch Collaboration Wall.
Both wall mounted and table mounted displays have had a few
ergonomic problems. "Gorilla arm" was a side effect that destroyed
wall mounted touch-screen as a mainstream. Developers of touch-screen systems,
failed to notice, that humans are not built to hold their arms high for a long
period of time, making small and precise motions at the same time. Table
mounted displays do not share this problem, however, users can develop neck
pain after using it for a period of time and their view is obstructed by their
arms.
Limited one-finger touch-screen capability has been
available before, but Windows 7 is the first to deliver multi-touch. You can zoom
in by placing your fingers on the screen and spread them apart.
This is how touch screen has come into limelight. And in
current days you can easily observe how people has gone crazy for touch screen
mobiles, tablets etc in their day to day accessories.
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