REDUCING BENDING EFFECTS IN TOUCH SENSOR DEVICES
First Claim
1. A capacitive image sensor for detecting an input object, comprising:
- a first substrate having a first side;
a second substrate displaced from the first substrate to define a compressible region between the first substrate and the second substrate, wherein the first substrate is deflectable relative to the second substrate between a first position in which the compressible region has a first thickness and a second position in which the compressible region has a second thickness that is less than the first thickness;
a transmitter electrode disposed on the first substrate;
a receiver electrode disposed on the first substrate; and
a bending effect electrode disposed on the first substrate and disposed between the transmitter electrode and the receiver electrode,wherein when the first substrate is in the first position, a plurality of field lines extends from the transmitter electrode through the compressible region and terminates on the bending effect electrode, and when the first substrate is in the second position, the plurality of field lines extends from the transmitter electrode through the compressible region and terminates on the second substrate.
4 Assignments
0 Petitions
Accused Products
Abstract
A capacitive image sensor for detecting an input object includes a first substrate and a second substrate. A compressible region is defined between the first substrate and the second substrate. The first substrate is deflectable towards the second substrate. A transmitter electrode, receiver electrode, and bending effect electrode are disposed on the first substrate. The bending effect electrode is disposed between the transmitter electrode and receiver electrode and is configured to reduce a change in resulting signals detected from the receiver electrode caused by deflection of the first substrate towards the second substrate.
-
Citations
24 Claims
-
1. A capacitive image sensor for detecting an input object, comprising:
-
a first substrate having a first side; a second substrate displaced from the first substrate to define a compressible region between the first substrate and the second substrate, wherein the first substrate is deflectable relative to the second substrate between a first position in which the compressible region has a first thickness and a second position in which the compressible region has a second thickness that is less than the first thickness; a transmitter electrode disposed on the first substrate; a receiver electrode disposed on the first substrate; and a bending effect electrode disposed on the first substrate and disposed between the transmitter electrode and the receiver electrode, wherein when the first substrate is in the first position, a plurality of field lines extends from the transmitter electrode through the compressible region and terminates on the bending effect electrode, and when the first substrate is in the second position, the plurality of field lines extends from the transmitter electrode through the compressible region and terminates on the second substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An input device comprising:
-
a first substrate having a first side; a second substrate displaced from the first substrate to define a compressible region between the first substrate and the second substrate, wherein the first substrate is deflectable between a first position in which the compressible region has a first thickness and a second position in which the compressible region has a second thickness that is less than the first thickness; a plurality of sensing elements, each sensing element comprising a transmitter electrode disposed on the first substrate, a receiver electrode disposed on the first substrate and spaced apart from the transmitter electrode, and a bending effect electrode disposed on the first substrate and disposed between the transmitter electrode and the receiver electrode, wherein each bending effect electrode is configured such that when the first substrate is in the first position, a plurality of field lines extend from the transmitter electrode through the compressible region and terminate on the bending effect electrode, and when the first substrate is in the second position, the plurality of field lines extend from the transmitter electrode through the compressible region and terminate on the second substrate; and a processing system communicatively coupled to the transmitter electrodes and to the receiver electrodes, and configured to receive resulting signals received by the receiver electrodes when the transmitter electrodes are driven for capacitive sensing. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A capacitive image sensor for detecting an input object, comprising:
-
a first substrate having a first side; a second substrate displaced from the first substrate to define a compressible region between the first substrate and the second substrate, wherein the first substrate is deflectable relative to the second substrate between a first position in which the compressible region has a first thickness and a second position in which the compressible region has a second thickness that is less than the first thickness; a transmitter electrode disposed on the first substrate; a receiver electrode disposed on the first substrate; and a bending effect electrode disposed on the first substrate and disposed between the transmitter electrode and the receiver electrode, wherein a first magnitude of change in capacitive coupling between the transmitter electrode and the receiver electrode when the first substrate is deflected from the first position to the second position is lower than a second magnitude of change in capacitive coupling between the transmitter electrode and the receiver electrode that would occur in a capacitive image sensor that does not include the bending effect electrode. - View Dependent Claims (22, 23, 24)
-
Specification