Floating Touch
What Is Floating Touch??
 Floating touch™, that lets you interact with the
phone without even touching it. This unique us...
 This makes it possible to detect not only the screen
coordinates that you are pointing at, but also your
finger’s distan...
What Actually The Floating Touch Is?
 Current smartphones use capacitive touchscreens.
Manufacturers can use two types of sensors for such
– mutual and self c...
 There are two types of capacitive sensors used for
touch screens, mutual capacitance and self-
capacitance. Mutual capac...
Mutual capacitance Self capacitance
 With mutual capacitance, each
intersection of a line in the
illustration above forms...
Combining self and mutual capacitance
to allow floating touch™
 Floating touch™ is solved by running both mutual
capacita...
 Do you think floating touch is a must-have
feature for future smartphones?
Thank You

 Made By
 Sanchit Malhotra
 10 ITU 063
floating touch
floating touch
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floating touch

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Floating touch™, that lets you interact with the phone without even touching it. This unique user experience lets you control parts of the user interface (UI) by simply letting your finger hover above the screen.
Floating touch™ enables the phone to register your finger up to 20mm above the screen.

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floating touch

  1. 1. Floating Touch
  2. 2. What Is Floating Touch??  Floating touch™, that lets you interact with the phone without even touching it. This unique user experience lets you control parts of the user interface (UI) by simply letting your finger hover above the screen.  Floating touch™ enables the phone to register your finger up to 20mm above the screen.
  3. 3.  This makes it possible to detect not only the screen coordinates that you are pointing at, but also your finger’s distance from the screen.
  4. 4. What Actually The Floating Touch Is?
  5. 5.  Current smartphones use capacitive touchscreens. Manufacturers can use two types of sensors for such – mutual and self capacitance. The former allows multi-touch, while self capacitance sensors do not.  Sony uses both sensors simultaneously to create this hovering effect. Mutual capacitance is used for regular touch actions, and self capacitive sensors are activated when the Floating Touch feature is in use. This is what creates the “shadowing” effect (or highlighting).
  6. 6.  There are two types of capacitive sensors used for touch screens, mutual capacitance and self- capacitance. Mutual capacitance makes multi-touch detection possible. Self-capacitance generates a stronger signal than mutual capacitance, which allows accurate detection of the finger further away from the sensors. However, with self-capacitance it is not possible to perform multi-touch detection due to an effect called “ghosting”.
  7. 7. Mutual capacitance Self capacitance  With mutual capacitance, each intersection of a line in the illustration above forms a parallel plate capacitor. This means that each intersection is a sensor, which allows for true multi- touch since the position of each finger can be exactly measured. However, because the area of the intersection between two lines is very small, the electrical field of the sensor is also small. Since the field of the sensor is so small, the signal from it has a low strength. This makes it poor for sensing very small signals, like when the user’s finger hovers above the screen.  Self capacitance and the ghosting effect Looking at the graphs above, each X or Y line as whole is a capacitive sensor, in the case of self capacitance. This means that the sensors are larger compared to the mutual capacitance described above. The large sensors create strong signals, which make it possible to detect the user’s finger up to 20 mm above the screen. When a finger is on or just above the screen, the nearest sensor lines are activated (X1, Y0). If two fingers are detected, ghosting positions occurs since four lines activated. As you can see in the graph above, this gives four possible touch positions (all four activated intersections of
  8. 8. Combining self and mutual capacitance to allow floating touch™  Floating touch™ is solved by running both mutual capacitance and self capacitance, on the same touch screen, at the same time. Mutual capacitance is used for the normal touch sensing, including multi- touch. By running self-capacitance at the same time, we can detect a finger above the surface of the screen. However, since the floating touch™ technology depends on self capacitance, it is not possible to perform multi-touch gestures with the fingers hovering above the screen. However, multi- touch will work fine for the normal touch gestures on the screen.
  9. 9.  Do you think floating touch is a must-have feature for future smartphones?
  10. 10. Thank You   Made By  Sanchit Malhotra  10 ITU 063

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