Determining which hand is being used to operate a device using a fingerprint sensor

1. A method for using a fingerprint sensor of a mobile device to determine which hand is being used to operate the mobile device, comprising:

acquiring, by a processor, sensing data from the fingerprint sensor corresponding to a finger sensed by the fingerprint sensor;

acquiring touch data from a touch sensor of the mobile device corresponding to the finger;

determining, by the processor, an orientation of the finger based on the acquired sensing data from the fingerprint sensor and the acquired touch data from the touch sensor; and

generating, by the processor, a signal for indicating which hand is being used to operate the mobile device based on the determined orientation of the finger.

2. The method according to claim 1 , wherein determining the orientation of the finger further comprises:

comparing the acquired sensing data to enrollment data and determining a relative angle between the acquired sensing data and the enrollment data.

3. The method according to claim 2 , wherein the determined orientation of the finger is based on the determined relative angle in combination with an enrollment angle corresponding to the enrollment data.

4. The method according to claim 2 , wherein comparing the acquired sensing data to the enrollment data comprises comparing features of a sensed fingerprint image with features of an enrollment fingerprint image.

5. The method according to claim 1 , wherein the determined orientation of the finger is based on a local orientation field corresponding to ridges and/or valleys of the sensing data.

6. The method according to claim 1 , wherein a first range of angles for the determined orientation of the finger corresponds to generating a signal indicating that the mobile device is being operated using a left hand, and a second range of angles for the determined orientation of the finger corresponds to generating a signal indicating that the mobile device is being operated using a right hand.

7. The method according to claim 6 , wherein the first range of angles is a set of angles corresponding to a finger being placed off of a vertical axis on the fingerprint sensor from one side of the mobile device, and wherein the second range of angles is a set of angles corresponding to a finger being placed off of a vertical axis on the fingerprint sensor from an opposite side of the mobile device.

8. The method according to claim 7 , wherein the first range of angles includes an angle corresponding to a finger being placed horizontally on the fingerprint sensor from the one side of the mobile device, and wherein the second range of angles includes an angle corresponding to a finger being placed horizontally on the fingerprint sensor from the opposite side of the mobile device.

9. The method according to claim 7 , wherein a third range of angles for the determined orientation of the finger corresponds to generating a signal indicating that the mobile device being operated using an undetermined hand, wherein the third range of angles includes an angle corresponding to a finger being placed vertically on the fingerprint sensor.

10. The method according to claim 1 , wherein determining the orientation of the finger further comprises:

determining a shape parameter based on a detected shape from the acquired touch data;

wherein the determined orientation of the finger is based on an angle corresponding to the determined shape parameter.

11. The method according to claim 1 , wherein the determined orientation of the finger includes a direction of motion of the finger;

wherein a first direction of motion towards one side of the mobile device corresponds to generating a signal indicating that the mobile device is being operated using a left hand, and a second direction of motion towards an opposite side of the mobile device corresponds to generating a signal indicating that the mobile device is being operated using a right hand.

12. The method according to claim 11 , wherein determining the direction of motion of the finger comprises:

correlating multiple sequential fingerprint images corresponding to the finger being swiped over the fingerprint sensor.

13. The method according to claim 1 , further comprising:

determining, by the processor, whether the mobile device has changed hands based on data from another sensor of the mobile device.

14. The method according to claim 13 , wherein the another sensor of the mobile device is an accelerometer, and determining whether the mobile device has changed hands is based on data from the accelerometer indicating a movement pattern.

15. The method according to claim 13 , wherein the another sensor of the mobile device is the touch sensor, and determining that the mobile device has changed hands includes:

determining, based on data from the touch sensor, a release in grip on the side of the mobile device, and, after the release in grip, an establishment of a different grip.

16. The method according to claim 1 , further comprising:

modifying, by the mobile device, based on the generated signal, a graphical user interface (GUI) displayed by the mobile device.

17. A system for using a fingerprint sensor of a mobile device to determine which hand is being used to operate the mobile device, the system comprising:

the fingerprint sensor, configured to generate sensing data corresponding to a finger sensed by the fingerprint sensor;

a touch sensor, configured to generate touch data corresponding to the finger; and

a processing system, configured to acquire the sensing data from the fingerprint sensor, acquire the touch data from the touch sensor, determine an orientation of the finger based on the acquired sensing data and the acquired touch data and generate a signal for indicating which hand is being used to operate the mobile device based on the determined orientation of the finger.

18. The system according to claim 17 , wherein determining the orientation of the finger further comprises:

comparing the sensing data to enrollment data and determining a relative angle between the sensing data and the enrollment data.

19. The system according to claim 17 , wherein a first range of angles for the determined orientation of the finger corresponds to generating a signal indicating that the mobile device is being operated using a left hand, and a second range of angles for the determined orientation of the finger corresponds to generating a signal indicating that the mobile device is being operated using a right hand; and

wherein the first range of angles is a set of angles corresponding to a finger being placed off of a vertical axis on the fingerprint sensor from one side of the mobile device, and wherein the second range of angles is a set of angles corresponding to a finger being placed off of a vertical axis on the fingerprint sensor from an opposite side of the mobile device.

20. A mobile device, comprising:

a fingerprint sensor, configured to generate sensing data corresponding to a finger sensed by the fingerprint sensor;

a touch screen display, configured to display a graphical user interface (GUI) and generate touch data corresponding to the finger; and

a processing system, configured to acquire the sensing data from the fingerprint sensor, acquire the touch data from the touch screen display, determine an orientation of the finger based on the acquired sensing data and the acquired touch data, generate a signal for indicating which hand is being used to operate the mobile device based on the determined orientation of the finger, and modify the GUI based on the generated signal.

21. The mobile device according to claim 20 , wherein modifying the GUI further comprises:

orienting one or more interactive components of the GUI towards one side or another side of the touch screen display based on whether the mobile device is being operated using a left hand or a right hand, respectively.