Optical LCDs: Touchless Touch-Screens Could Be On The Horizon
THE popularity of touch-screens on mobile phones means that a swipe, tap or a flick comes as naturally these days as the click of a mouse. But existing touch-screens have their limits. Those relying on changes in electrical resistance tend to have poorer resolution than is needed for modern applications, while those that rely on capacitance require an ungloved finger.
Consequently, a new generation of touch-screens, known as optical liquid crystal displays, is emerging.