During the day yesterday was announced which will be the fourth terminal of Sony Mobile, which will be called Xperia single and will be accompanied by a new technology applied to the tactile sensors screen.
This new technology, called Floating Touch, It allows to interact with device without even touching it, user experience which leads to forms of interaction that they surpass the finger and reach gestures. Erick Elmann, engineer and researcher at Sony Mobile, explains their operating principles, We bring you so that you can understand it better.
How Floating Touch?
Like many other smartphones, are Xperia or other brands, the display with capacitive multi-touch sensor It works as a listener on a mesh XY where electrodes, which are generated by the contact of a lively body like finger, generates a voltage that varies by capacity, which is then measured and compared to thus identifying the position of the finger.
There are, however, two types of capacitive sensors used for this type of touch screens, one of type “ Self Capacitance & #8221; and the other type “ Mutual Capacitance“. It is last makes it possible to detect multiple touches at various points, while the first generates a stronger signal that allows more accurate detection of finger even with little pressure or away from the sensor. The disadvantage of the “ Self Capacitance ” is a very annoying ghost effect that can be created during the detection of multiple points.
Mutual Capacitance makes possible the multitouch
The grid on the right in the figure represents the technology “ Mutual Capacitance ”, where each intersection within each line represents a capacitor in parallel. This means that each intersection is a sensor, allowing the execution multi-touch insofar as the position of each finger can be measured accurately. However, the area of intersection between two lines is very small, and the electric field sensor will be very low, so the detection is quite restrictive limits.
Self Capacitance and ghosting
On the left we have the other type of capacitive sensor, where each X line or and also leads to an intersection and a sensor, but unlike of the “ Mutual Capacitance & #8221; each of them is independent and has its own capacity to recreate high-intensity signals, thus making possible the detection to approximately 20 mm above the screen.
The ghosting occurs when the recognition of two lines of contact can overcome and create four (in the figure are the intersections in X 1, X 3, Y0, Y2) giving rise to a wrong combination that makes it impossible for the multitouch.
Combining the two technologies Gets the experience Floating Touch
Combining these two principles can be a new technology, which Sony has designated as Floating Touch, where the first sensor is used for accurately detect the majority of touches on the screen and the second for lead detection at a distance without direct contact.
In this way lose multi-touch detection when we don’t touch the screen, but instead we get the possibility of detect gestures without touching it. Once we played it, we have again a multi type sensor.
Applications of Floating Touch technology
All Android applications and the entire interface might be able to operate this type of technology, although natively the single Sony Xperia It is capable of using Floating Touch in your Internet browser Activating a kind of cursor that moves with your finger and is able to navigate through links with a small pressure.
With the next updates that come from the hand of Ice Cream Sandwich, developers can integrate this technology through the HTML5 standard or even within your own applications using the API that will be released In brief.
For the occasion, we have a video Sony has released where he explains the operation of Floating Touch, and where promise us many surprises in the future of the Xperia range with this new technology: