Touch sensing display devices and related methods

• US 8,872,804 B2
• Filed: 07/21/2011
• Issued: 10/28/2014
• Est. Priority Date: 07/21/2011
• Status: Active Grant

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Qualcomm MEMS Technologies Incorporated (Qualcomm, Inc.)
• Inventors: Martin, Russel A., Cummings, William J.
• Primary Examiner(s): Bost, Dwayne
• Assistant Examiner(s): Azari, Sepehr
• Application Number:
  US13/187,803
• Publication Number:
  US 20130021303A1
• Time in Patent Office: 1,195 Days
• Field of Search: 178/18.01, 345/84, 345/173, 345/174, 345/691
• US Class Current: 345/178
• CPC Class Codes: G06F 1/3262 Power saving in digitizer or tablet
• CPC Class Codes: G06F 3/04166 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 Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

The present disclosure provides systems, methods, and apparatus relating to touch sensing display devices that include a sensing device and a display device. In one aspect, a touch sensing display device can include adaptive addressing architecture to adjust an addressing characteristic based at least in part in a sensing characteristic of a sensing device. In another aspect, a touch sensing display device can include adaptive sensing architecture to adjust a sensing characteristic of a sensing device based at least in part on an addressing characteristic of a display device and/or on an electrical interference characteristic altered by an addressing circuit of the display device.

Claims

1. A touch sensing display device comprising:

a touch sensor;

a display device disposed underneath at least a portion of the touch sensor;

an addressing circuit capable of addressing a plurality of display rows of the display device according to at least one addressing characteristic of the display device, wherein the addressing causes a change in an interference characteristic of the display device; and

a sensing circuit capable of adjusting at least one sensing characteristic of the touch sensor based at least in part on the change in the interference characteristic, wherein the at least one sensing characteristic includes a sampling rate or a sensitivity threshold.

2. The touch sensing display device of claim 1, wherein the sensing circuit is capable of sensing based on the at least one addressing characteristic or the interference characteristic.

3. The touch sensing display device of claim 1, wherein the addressing causes the interference characteristic to increase.

4. The touch sensing display device of claim 3, wherein the sensing circuit is configured to decrease the at least one sensing characteristic.

5. The touch sensing display device of claim 1, wherein the addressing causes the interference characteristic to decrease.

6. The touch sensing display device of claim 5, wherein the sensing circuit is configured to increase the at least one sensing characteristic.

7. The touch sensing display device of claim 1, wherein the at least one sensing characteristic includes a signal-to-noise ratio.

8. The touch sensing display device of claim 1, wherein the addressing characteristic includes information identifying an addressing region.

9. The touch sensing display device of claim 1, wherein the addressing characteristic includes an update speed.

10. The touch sensing display device of claim 1, wherein the display device includes an interferometric modulator.

11. The touch sensing display device of claim 1, further comprising a lookup table stored in one or more storage devices coupled to the sensing circuit, wherein the lookup table includes the at least one addressing characteristic and the at least one sensing characteristic.

12. The touch sensing display device of claim 1, further comprising:

a processor that is capable of communicating with the display device, the processor being capable of processing image data; and

a memory device that is capable of communicating with the processor.

13. The touch sensing display device of claim 12, further comprising:

a driver circuit configured to send at least one signal to the display device.

14. The touch sensing display device of claim 13, further comprising a controller capable of sending at least a portion of the image data to the driver circuit.

15. The touch sensing display device of claim 12, further comprising an input device capable of receiving input data and to communicate the input data to the processor.

16. The touch sensing display device of claim 15, wherein the input device comprises a touch sensor.

17. The touch sensing display device of claim 12, further comprising an image source module capable of sending the image data to the processor.

18. The touch sensing display device of claim 17, wherein the image source module comprises at least one of a receiver, transceiver, and transmitter.

19. A touch sensing display device comprising:

means for sensing a touch input;

means for displaying information disposed underneath at least a portion of the sensing means;

means for addressing the means for displaying information;

means for adjusting at least one addressing characteristic of the means for displaying information, wherein adjusting the at least one addressing characteristic alters an interference characteristic of the means for displaying information; and

means for adjusting at least one sensing characteristic of the sensing means based at least in part, on at least one of the addressing characteristic and the interference characteristic.

20. The device of claim 19, wherein the addressing means includes an addressing circuit.

21. The display device of claim 19, wherein the sensing means includes a sensing circuit.

22. The display device of claim 19, wherein the sensing means is capable of sensing based on the adjusted sensing characteristic.

23. The display device of claim 19, wherein the addressing means is capable of adjusting the at least one addressing characteristic such that the interference characteristic increases.

24. The display device of claim 23, wherein the sensing means is capable of decreasing the at least one sensing characteristic.

25. The display device of claim 19, wherein the addressing means is capable of adjusting the at least one addressing characteristic such that the interference characteristic decreases.

26. The display device of claim 25, wherein the sensing means is capable of increasing the at least one sensing characteristic.

27. A method comprising:

adjusting at least one addressing characteristic of a display, wherein the display is disposed underneath at least a portion of a touch sensor, wherein adjusting the at least one addressing characteristic alters an interference characteristic of the display;

adjusting at least one sensing characteristic of the touch sensor based, at least in part, on the addressing characteristic or the interference characteristic; and

sensing based on the adjusted sensing characteristic.

28. The method of claim 27, wherein adjusting the at least one addressing characteristic increases the interference characteristic.

29. The method of claim 28, wherein the at least one sensing characteristic is decreased.

30. The method of claim 27, wherein adjusting the at least one addressing characteristic decreases the interference characteristic.

31. The method of claim 30, wherein the at least one sensing characteristic is increased.