PIEZOELECTRIC TACTILE INTERFACE
First Claim
1. An interface, comprising:
- a piezoelectric layer configured to overlay a display;
a plurality of sensors disposed in a pattern over the piezoelectric layer, the sensors configured to sense signals generated by the piezoelectric layer; and
a sensing circuit coupled to the piezoelectric layer and configured to determine a tactile input from signals sensed by the sensors.
1 Assignment
0 Petitions
Accused Products
Abstract
A piezoelectric tactile input device and method in a computing environment. An embodiment disclosed herein includes a touch screen having a piezoelectric material layer that may generate a voltage when deformed in a localized area. The piezoelectric layer may also include a pattern of sensors for detecting the voltage generated. The detected voltage signals may then be used to extrapolate the position of the localized area in which the piezoelectric layer was deformed (e.g., from a finger touch or a stylus). Further, because the piezoelectric layer generates a greater voltage in the presence of a greater pressure, the device may further decipher a relative level of force for the tactile input on the touch screen.
513 Citations
20 Claims
-
1. An interface, comprising:
-
a piezoelectric layer configured to overlay a display; a plurality of sensors disposed in a pattern over the piezoelectric layer, the sensors configured to sense signals generated by the piezoelectric layer; and a sensing circuit coupled to the piezoelectric layer and configured to determine a tactile input from signals sensed by the sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A computing device, comprising
a processor; -
a display coupled to the processor and configured to display graphics under the control of the processor; and a touch screen overlaying the display and coupled to the processor;
the touch screen including;a first piezoelectric layer having a first poling axis; a second piezoelectric layer adjacent to the first piezoelectric layer and having a second poling axis orthogonal to the first poling axis; and a sensing circuit coupled to the piezoelectric layer and configured to determine a tactile input from signals generated from the piezoelectric layer. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. A method of detecting tactile input, the method comprising:
-
deforming a location of a layer of piezoelectric material; detecting respective voltages at a plurality of locations of the layer with a plurality of sensors disposed over the piezoelectric layer; and determining the location of the deformation in response to the voltages. - View Dependent Claims (17, 18, 19, 20)
-
Specification