Identifying multiple users on a large scale projected capacitive touchscreen
System, method, and computer program products are provided that can support touch interaction from multiple users on a large scale projective capacitive (PCAP) display system, such as a gaming table. According to some embodiments, a system includes a touchscreen coupled to a controller. The controller adjusts performance of the touchscreen through dynamically setting a controller parameter to support altered touch reporting in a first area of the touchscreen compared to a second area of the touchscreen. The controller enables touch detection for the first area according to performance characteristics needed for an application operating in the second area. Some embodiments include the controller identifying a user associated with the first area, where the controller receives and analyzes a watermarked touch signal from the first area that includes a touch signal and a unique signal, detects an associated touch location, and detects the unique signal associated with the user.
1. A system, comprising:
a touchscreen; and
a controller coupled to the touchscreen, the controller configured to:
adjust performance of the touchscreen through dynamically setting a controller parameter to support altered touch reporting in at least one first area of the touchscreen relative to a second area of the touchscreen;
control enablement of touch detection for the at least one first area according to performance characteristics associated with an application operating in the second area; and
identify a user associated with the at least one first area, wherein the controller is configured to:
receive a watermarked touch signal from the at least one first area, wherein the watermarked touch signal comprises a touch signal and a unique signal;
analyze the watermarked touch signal;
detect a touch location associated with the touch signal; and
detect the unique signal, wherein the unique signal is associated with the user.
2. The system of claim 1 , wherein the unique signal is associated with one drive frequency of the controller and wherein a second unique signal is associated with a different drive frequency of the controller.
3. The system of claim 1 , wherein the unique signal is associated with a unique code.
4. The system of claim 3 , wherein the unique code is an orthogonal code.
5. The system of claim 1 , wherein the unique signal is associated with a unique combination of a drive frequency of the controller and a code.
6. The system of claim 5 , wherein the code is an orthogonal code.
7. The system of claim 1 , wherein to detect the unique signal, the controller is configured to:
receive the unique signal from a device that the user touches;
receive an identifier of the user from the device;
associate the identifier of the user with the device; and
position the at least one first area to be in proximity to the device.
8. The system of claim 7 , wherein the controller is further configured to:
receive a second unique signal from a second device that the user touches;
determine that the second unique signal is associated with the identifier of the user;
dis-associate the user with the device;
associate the user with the second device; and
position the at least one first area to be in proximity to the second device.
9. The system of claim 7 , wherein the identifier of the user is a hand image and the device is a touch pad.
10. The system of claim 9 , wherein the hand image is a capacitive image, and the controller is further configured to extract features from the capacitive image that uniquely identify the user.
11. The system of claim 7 , wherein the identifier of the user comprises electrical impedance measurements at differing frequencies.
12. The system of claim 7 , wherein the controller is further configured to:
receive a second unique signal from the device;
determine that the second unique signal is not associated with the user;
dis-associate the identifier of the user with the device;
associate a second identifier of a second user associated with the second unique signal with the device; and
position a third area associated with the second user to be in proximity to the device.
13. A method, comprising:
adjusting performance of a touchscreen through dynamically setting a controller parameter to support altered touch reporting in at least one first area of the touchscreen relative to a second area of the touchscreen;
controlling enablement of touch detection for the at least one first area according to performance characteristics associated with an application operating in the second area; and
identifying a user associated with the at least one first area, comprising:
receiving a watermarked touch signal from the at least one first area, wherein the watermarked touch signal comprises a touch signal and a unique signal;
analyzing the watermarked touch signal;
detecting a touch location associated with the touch signal; and
detecting the unique signal, wherein the unique signal is associated with the user.
14. The method of claim 13 , wherein the detecting the unique signal comprises:
receiving the unique signal from a device that the user touches;
receiving an identifier of the user from the device;
associating the identifier of the user with the device; and
positioning the at least one first area to be in proximity to the device.
15. The method of claim 14 , further comprising:
receiving a second unique signal from a second device that the user touches;
determining that the second unique signal is associated with the identifier of the user;
dis-associating the user with the device;
associating the user with the second device; and
positioning the at least one first area to be in proximity to the second device.
16. The method of claim 14 , further comprising:
receiving a second unique signal from the device;
determining that the second unique signal is not associated with the user;
dis-associating the identifier of the user with the device;
associating a second identifier of a second user associated with the second unique signal with the device; and
positioning a third area associated with the second user to be in proximity to the device.
17. A non-transitory computer readable medium having stored therein one or more instructions that, when executed by one or more processors, cause the one or more processors to perform operations, the operations comprising:
adjusting performance of a touchscreen through dynamically setting a controller parameter to support altered touch reporting in at least one first area of the touchscreen relative to a second area of the touchscreen;
controlling enablement of touch detection for the at least one first area according to performance characteristics associated with an application operating in the second area; and
identifying a user associated with the at least one first area comprising:
receiving a watermarked touch signal from the at least one first area, wherein the watermarked touch signal comprises a touch signal and a unique signal;
analyzing the watermarked touch signal;
detecting a touch location associated with the touch signal; and
detecting the unique signal, wherein the unique signal is associated with the user.
18. The non-transitory computer readable medium of claim 17 , wherein the detecting the unique signal, comprises:
receiving the unique signal from a device that the user touches;
receiving an identifier of the user from the device;
associating the identifier of the user with the device; and
positioning the at least one first area to be in proximity to the device.
19. The non-transitory computer readable medium of claim 18 , wherein the operations further comprise:
receiving a second unique signal from a second device that the user touches;
determining that the second unique signal is associated with the identifier of the user;
dis-associating the user with the device;
associating the user with the second device; and
positioning the at least one first area to be in proximity to the second device.
20. The non-transitory computer readable medium of claim 18 , wherein the operations further comprise:
receiving a second unique signal from the device;
determining that the second unique signal is not associated with the user;
dis-associating the identifier of the user with the device;
associating a second identifier of a second user associated with the second unique signal with the device; and
positioning a third area associated with the second user to be in proximity to the device.