Supporting multiple users on a large scale projected capacitive touchscreen

Patent metadata

Field	Value
Publication number	US-9740352-B2
Application number	US-201514871496-A
Country	US
Kind code	B2
Filing date	Sep 30, 2015
Priority date	Sep 30, 2015
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

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 an embodiment, 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. An altered touch reporting area may be a fast scan area or a slow scan area. In addition, enrichment data areas may include at least one of a fast scan area, a slow scan area, or an area of a touchscreen during a full scan.

First claim

What is claimed is:

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, wherein the touchscreen comprises a plurality of driven lines, and the controller is further configured to:
determine in real time, at least one driven line of the plurality of driven lines to activate, wherein the controller parameter comprises a subset of driven lines of the plurality of driven lines associated with the at least one first area, and wherein the at least one first area is smaller than the second area;
activate the at least one driven line of the plurality of driven lines at a time;
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
receive dimensions of the at least one first area, dimensions of a no-scan area, a scan rate of the at least one first area, and enrichment data.

2. The system of claim 1 , wherein the at least one first area is static on the touchscreen.

3. The system of claim 1 , wherein the at least one first area is a fast scan area.

4. The system of claim 3 , wherein the at least one first area is dynamic on the touchscreen, and moves according to a detected touch location.

5. The system of claim 3 , wherein to further control enablement, the controller is further configured to: identify a user associated with the at least one first area.

6. The system of claim 5 , wherein to identify the user, the controller is further 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; and
detect the unique signal, wherein the unique signal is associated with the user.

7. The system of claim 6 , wherein the unique signal is associated with a drive frequency of the controller.

8. The system of claim 7 , wherein the unique signal includes a unique code modulated to the drive frequency, and wherein the unique signal is a low voltage signal.

9. The system of claim 8 , wherein the unique code is an orthogonal code.

10. The system of claim 6 , wherein the unique signal is associated with one drive frequency of the controller, wherein a second unique signal is associated with a different drive frequency of the controller.

11. The system of claim 10 , wherein each associated drive frequency is paired with a code, and a combination of each associated drive frequency and code is unique.

12. The system of claim 6 , further comprising:
a touch pad coupled to the touchscreen, wherein the touch pad is configured to:
capture an identifying image of a hand of the user; and
transfers the unique signal to the user when the user touches the touch pad, wherein the at least one first area is positioned in proximity with the touch pad.

13. The system of claim 12 , wherein when the user touches the second area, the controller is further configured to:
receive a second watermarked touch signal from the second area, wherein the second watermarked touch signal comprises a second touch signal and the unique signal; and
analyze the second watermarked touch signal to detect the unique signal.

14. The system of claim 5 , wherein to identify the user, the controller is further configured to:
receive touch signal from the at least one first area;
detect a touch location; and
detect a palm print, wherein the palm print is associated with the user.

15. The system of claim 5 , wherein the controller is further configured to: maintain user identification through signal communication to and from a device in contact with the user.

16. The system of claim 15 , wherein the controller is further configured to:
detect a user touch in the at least one first area;
receive a signal from the device, wherein the signal comprises: a unique serial number identifying the user, and a detected driver signal corresponding to the user touch; and
correlate the user touch detected with the user.

17. The system of claim 1 , wherein the at least one first area is a slow scan area.

18. The system of claim 17 , further comprising:
a sensor in contact with the at least one first area, wherein the sensor is configured to:
detect changes in at least one of: temperature, pressure, and weight; and
adjust an electric field of the sensor accordingly; and

the controller further configured to: detect the electric field adjustment.

19. The system of claim 18 , wherein the sensor comprises: a metal strip comprising at least two metals with different coefficients of expansion, wherein a shape of the metal strip alters according to a change in temperature.

20. The system of claim 18 , wherein the sensor comprises: a spring whose height changes with a change in pressure or mass.

21. A method, comprising:
adjusting performance of a touchscreen through dynamically setting a controller parameter to support an altered touch reporting in at least one first area of the touchscreen relative to a second area of the touchscreen, wherein the touchscreen comprises a plurality of driven lines:
determining in real time, at least one driven line of the plurality of driven lines to activate, wherein the controller parameter comprises a subset of driven lines of the plurality of driven lines associated with the at least one first area, and wherein the at least one first area is smaller than the second area;
activating the at least one driven line of the plurality of driven lines at a time;
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
receiving dimensions of the at least one first area, dimensions of a no-scan area, a scan rate of the at least one first area, and enrichment data.

22. A non-transitory computer readable medium carrying one or more sequences of one or more instructions for execution by 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, wherein the touchscreen comprises a plurality of driven lines:
determining in real time, at least one driven line of the plurality of driven lines to activate, wherein the controller parameter comprises a subset of driven lines of the plurality of driven lines associated with the at least one first area, and wherein the at least one first area is smaller than the second area;
activating the at least one driven line of the plurality of driven lines at a time;
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
receiving dimensions of the at least one first area, dimensions of a no-scan area, a scan rate of the at least one first area, and enrichment data.

Assignees

• Elo Touch Solutions Inc

Inventors

• Ahsan Agha
• Ali Gazi
• Azim Khalid
• Kent Joel C
• SON Kyu Tak
• Williams Robert
• Xu Yansun

Classifications

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/04166 Primary

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title

• G06F3/041661

  using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window · CPC title

• G06F3/0446 Primary

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title