Haptic display with simultaneous sensing and actuation
First Claim
Patent Images
1. A touch interface having simultaneous sensing and actuation comprising:
- an insulating substrate having a front surface and a rear surface;
a plurality of electrodes disposed on the rear surface arranged in a first pattern;
a plurality of electrodes disposed on the front surface arranged in a second pattern that mirrors the first pattern, wherein the electrodes on the front surface have a substantial mutual capacitance with corresponding mirrored electrodes on the rear surface,wherein when a transmitted signal is applied to at least one of the electrodes on the rear surface, the transmitted signal passes through the insulating substrate via the mutual capacitance to the at least one electrode on the front surface such that when a user'"'"'s finger is disposed contiguous with the front surface the finger modulates a strength of reception of the transmitted signal from the at least one electrode on the front surface to at least one other electrode on the front surface as a received signal;
wherein the received signal passes through the insulating substrate via the mutual capacitance to at least one electrode on the rear surface so that a location of the user'"'"'s finger is determined from the strength of reception of the received signal.
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Abstract
Touch interface devices having systems and methods for producing multi-point haptics utilizing simultaneous sensing and actuation are disclosed. In a first configuration, two layers of electrodes are used, including a top layer for haptics near a touch surface of an insulating substrate and a bottom layer for sensing at the bottom surface of the insulating substrate, with the two electrode sets have substantially the same pattern as one another. In a second configuration, a single array of electrodes is used near a touch surface of an insulating substrate and serves as both surface haptic devices and sensing devices.
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Citations
19 Claims
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1. A touch interface having simultaneous sensing and actuation comprising:
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an insulating substrate having a front surface and a rear surface; a plurality of electrodes disposed on the rear surface arranged in a first pattern; a plurality of electrodes disposed on the front surface arranged in a second pattern that mirrors the first pattern, wherein the electrodes on the front surface have a substantial mutual capacitance with corresponding mirrored electrodes on the rear surface, wherein when a transmitted signal is applied to at least one of the electrodes on the rear surface, the transmitted signal passes through the insulating substrate via the mutual capacitance to the at least one electrode on the front surface such that when a user'"'"'s finger is disposed contiguous with the front surface the finger modulates a strength of reception of the transmitted signal from the at least one electrode on the front surface to at least one other electrode on the front surface as a received signal; wherein the received signal passes through the insulating substrate via the mutual capacitance to at least one electrode on the rear surface so that a location of the user'"'"'s finger is determined from the strength of reception of the received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification