The easiest way to turn an ordinary touch-screen




The easiest way to turn an ordinary touch-screen

touch screen

Electromagnetic interference can disrupt cell phones and degrade the quality of signal reception. But they can be the key to the transformation of traditional LCDs touch screens with gesture control.

A group of researchers from the computer lab at Washington University has developed a method of converting a conventional liquid crystal display (LCD) touch screen method to electromagnetic interference. UTouch technology involves the use of a simple sensor and software. At the heart of this technology is the weak electromagnetic radiation, the source of which is consumer electronics.

“Devices around us are the source of these signals. But people do not attach importance to them, as they perceive as interference, “- said the researcher and co-author Siddhantham Gupta.

If for tablet computers and smartphones touchscreens already become the norm, then in television panels and computer monitors are just beginning to be spread.

Existing methods of turning passive into sensitive display screens tend to rely on cameras or other sensors. However, this solution is not always practical. The latter study will be presented as part of the May conference in Paris, where he will focus on human-computer interaction.

The study authors noted that the measured and analyzed the nature of the signals from the LCD displays for presentation to the screen arm. These signals are recorded as electromagnetic interference, and their measurement can be performed with a 5-dollar sensor connected to a home outlet.

The sensor was collecting information on electromagnetic interference and sent it to a connected computer system with special software. The program used a machine learning method for prediction signal that is recognized as noise, or as one of the five established gestures. After registering a touch screen or a gesture performed by a team.

“We are trying to better understand the behavior of the signal, its intensity” – says Gupta.

Each display creates its own electromagnetic interference. The sensor is able to see the difference between them. This makes it possible to teach the conventional liquid crystal displays to recognize touch and gestures.

But uTouch technology has its limitations. With this method, you can not turn an ordinary display into an interactive screen of the iPhone or Android-smartphone. The device responds to simple gestures that play video, start and stop the application. More complex movement of fingers on the screen it is not yet clear.

The researchers do not plan to commercialize the technology, but, according to Gupta, the necessary components are commercially available, and all of the algorithms discussed in the report. So if you want the system can be assembled by yourself.

The team will continue to work on improving the technology uTouch.

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Tags: LCD , Video , Sensor technology , Gesture control .

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