Reducing bending effects in touch sensor devices
First Claim
Patent Images
1. A capacitive image sensor for detecting an input object, comprising:
- a first substrate;
a second substrate displaced from the first substrate;
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, the transmitter electrode configured to transmit a transmitter signal;
a receiver electrode disposed on the first substrate and configured to receive a resulting signal comprising effects corresponding to the transmitter signal;
a bending effect electrode disposed on the first substrate and disposed between the transmitter electrode and the receiver electrode;
one or more floating electrodes, the floating electrodes configured to increase electrical coupling between the transmitter electrode and the receiver electrode; and
wherein when the first substrate is in the first position, a plurality of field lines associated with the resulting signal 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.
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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.
13 Citations
24 Claims
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1. A capacitive image sensor for detecting an input object, comprising:
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a first substrate; a second substrate displaced from the first substrate; 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, the transmitter electrode configured to transmit a transmitter signal; a receiver electrode disposed on the first substrate and configured to receive a resulting signal comprising effects corresponding to the transmitter signal; a bending effect electrode disposed on the first substrate and disposed between the transmitter electrode and the receiver electrode; one or more floating electrodes, the floating electrodes configured to increase electrical coupling between the transmitter electrode and the receiver electrode; and wherein when the first substrate is in the first position, a plurality of field lines associated with the resulting signal 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)
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11. An input device comprising:
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a first substrate; a second substrate displaced from the first substrate; 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, the transmitter electrode configured to transmit a transmitter signal, the receiver electrode configured to receive a resulting signal comprising effects corresponding to the transmitter signal, wherein each bending effect electrode is configured such that when the first substrate is in the first position, a plurality of field lines associated with the resulting signals 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; one or more floating electrodes, the floating electrodes configured to increase electrical coupling between the transmitter electrode and the receiver electrode; and a processing system communicatively coupled to the transmitter electrodes and to the receiver electrodes, and configured to receive the resulting signals received by the receiver electrodes when the transmitter electrodes are driven with the transmit signal for capacitive sensing. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A capacitive image sensor for detecting an input object, comprising:
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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, the transmitter electrode configured to transmit a transmitter signal; a receiver electrode disposed on the first substrate and configured to receive a resulting signal comprising effects corresponding to the transmitter signal; a bending effect electrode disposed on the first substrate and disposed between the transmitter electrode and the receiver electrode; one or more floating electrodes, the floating electrodes configured to increase electrical coupling between the transmitter electrode and the receiver electrode; and wherein the bending effect electrode is configured to reduce an amount of change in capacitive coupling associated with the resulting signal between the transmitter electrode and the receiver electrode that occurs when the first substrate is deflected from the first position to the second position. - View Dependent Claims (22, 23, 24)
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Specification