Ultrasonic fingerprint sensor in display bezel
First Claim
1. An electronic device configured to identify a user, the electronic device comprising:
- a display;
a cover above the display;
a first array of ultrasonic transducers arranged along a first side of the display, the first array of ultrasonic transducers configured to produce a first bulk wave transverse to a plane of the cover;
a first mode converter formed as a convex contoured region that connects an outer surface of the cover and an adjacent side surface of the electronic device, the first mode converter configured to convert the first bulk wave into a surface wave in the cover, wherein a set of scattered waves comprising a scattered wave pattern are created by a user touch on the cover;
a second mode converter arranged along a second side of the display, the second mode converter configured to convert at least a portion of the set of scattered waves into a second bulk wave transverse to the plane of the cover;
a second array of ultrasonic transducers arranged along the second side of the display, the second array of ultrasonic transducers configured to receive the second bulk wave and produce an output associated with the scattered wave pattern that corresponds to fingerprint characteristics of the user; and
a processing unit configured to distinguish the user from other users based on the output.
1 Assignment
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Accused Products
Abstract
An electronic device that includes an enclosure having an external surface and a first array of ultrasonic transducers arranged along a first direction and a second array of ultrasonic transducers arranged along a second direction. The first array of ultrasonic transducers may be configured to produce a surface wave along the external surface. A set of scattered waves may be created by the touch on the external surface. The second array of ultrasonic transducers may be configured to receive a portion of the set of scattered waves and produce an output. The device may also include a processing unit that is configured to identify the touch using the output. The processing unit may be further configured to create a reconstruction of at least a portion of a fingerprint associated with the touch on the cover, and to identify the fingerprint using the reconstruction.
139 Citations
18 Claims
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1. An electronic device configured to identify a user, the electronic device comprising:
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a display; a cover above the display; a first array of ultrasonic transducers arranged along a first side of the display, the first array of ultrasonic transducers configured to produce a first bulk wave transverse to a plane of the cover; a first mode converter formed as a convex contoured region that connects an outer surface of the cover and an adjacent side surface of the electronic device, the first mode converter configured to convert the first bulk wave into a surface wave in the cover, wherein a set of scattered waves comprising a scattered wave pattern are created by a user touch on the cover; a second mode converter arranged along a second side of the display, the second mode converter configured to convert at least a portion of the set of scattered waves into a second bulk wave transverse to the plane of the cover; a second array of ultrasonic transducers arranged along the second side of the display, the second array of ultrasonic transducers configured to receive the second bulk wave and produce an output associated with the scattered wave pattern that corresponds to fingerprint characteristics of the user; and a processing unit configured to distinguish the user from other users based on the output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electronic device configured to identify a particular user, the electronic device comprising:
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an enclosure having an external surface; a first array of ultrasonic transducers arranged along a first direction, the first array of ultrasonic transducers configured to produce a surface wave along the external surface, the surface wave initiated upon reflection from a converter positioned on an edge of the external surface, wherein a set of scattered waves forming a wave pattern are created by a touch on the external surface; a second array of ultrasonic transducers arranged along a second direction, the second array of ultrasonic transducers configured to receive a portion of the set of scattered waves and produce an output derived from the wave pattern which corresponds to fingerprint characteristics of the particular user; and a processing unit configured to identify the particular user based on the output;
wherein;the converter is formed as a convex contoured region that connects the external surface of the cover and an adjacent side surface of the electronic device. - View Dependent Claims (11, 12, 13)
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14. A method for identifying a user based on a touch on a surface of a device, the method comprising:
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generating a surface wave from a converter formed as a convex contoured region connecting the surface of the device to an adjacent side surface of the device, the surface wave propagating across the surface along a first direction, receiving a reflected wave generated by the touch on the surface, the reflected wave propagating across the surface along a second direction and comprising a touch pattern; sensing the reflected wave and producing a characteristic output associated with a fingerprint of the user based on the touch pattern; and identifying the user based on at least the characteristic output. - View Dependent Claims (15, 16, 17, 18)
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Specification