Method and device for analyzing two-dimension sensing information

• US 20110084928A1
• Filed: 10/08/2010
• Published: 04/14/2011
• Est. Priority Date: 10/09/2009
• Status: Active Grant

• Current Assignee: eGalax_eMPIA Technology Inc.
• Original Assignee: eGalax_eMPIA Technology Inc.
• Inventors: Lee, Cheng-Han, Ho, Shun-Lung, Tang, Chi-Hao, Chang, Chin-Fu
• Granted Patent: US 8,941,597 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G01R 27/2605 Measuring capacitance capacitive sensors G01D5/24
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04104 Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04162 for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
• CPC Class Codes: G06F 3/04182 Filtering of noise external to the device and not generated by digitiser components
• CPC Class Codes: G06F 3/0441 using active external devices, e.g. active pens, for receiving changes in electrical potential transmitted by the digitiser, e.g. tablet driving signals
• CPC Class Codes: G06F 3/0442 using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

The method and device for analyzing two-dimension sensing information are disclosed. The two-dimension (2-D) sensing information is analyzed for determining touch related sensing information. The touch related sensing information may include touch related sensing information with inner lower values within outer high values and with inner higher values within outer low values.

Claims

1. A method for analyzing 2-D sensing information, comprising:

analyzing a first 2-D sensing information to determine each touch related sensing information with inner lower values within outer high values in the first 2-D sensing information.

2. The method of claim 1, further comprising:

converting each touch related sensing information with inner lower values within outer high values into touch related sensing information with inner higher values within outer low values.

3. The method of claim 1, further comprising:

obtaining a second 2-D sensing information; and

performing a conversion on positive or negative values of the second 2-D sensing information to generate the first 2-D sensing information, the conversion selected from one of the group consisting of;

converting negative to positive values, converting positive to negative values, converting positive to zero values, and converting negative to zero values.

4. The method of claim 1, further comprising:

converting each touch related sensing information with inner lower values within outer high values into touch related sensing information with inner higher values within outer low values based on a corresponding portion in the second 2-D sensing information.

5. The method of claim 3, further comprising:

converting each touch related sensing information with a plurality of peaks into touch related sensing information with inner higher values within outer low values based on a corresponding portion in the second 2-D sensing information.

6. The method of claim 1, wherein the analyzing further includes:

analyzing the first 2-D sensing information to determine each touch related sensing information with inner higher values within lower high values in the first 2-D sensing information.

7. The method of claim 6, further comprising:

analyzing the contour of each touch related sensing information; and

outputting geometric information based on each contour, wherein representation of the geometric information is selected from one or a combination of the following representations;

circle, oval, rectangle and polygon.

8. The method of claim 6, further comprising:

calculating a centroid location or a geometric center of each touch related sensing information as a touch location.

9. The method of claim 6, further comprising:

converting touch related sensing information with two peaks into touch related sensing information with one peak.

10. The method of claim 1, wherein the 2-D sensing information includes:

a plurality of dual differences;

a plurality of positive and negative values generated from the plurality of dual differences, wherein all the negative values of these dual differences are converted into zero values or all the positive values of these dual differences are converted into zero values;

or

a plurality of positive and negative values generated from a plurality of differences, wherein all the negative values of these differences are converted into positive values or all the positive values of these differences are converted into negative values.

11. A device for analyzing 2-D sensing information, comprising a controller and a host for performing an analysis, comprising:

analyzing a first 2-D sensing information to determine each touch related sensing information with inner lower values within outer high values in the first 2-D sensing information.

12. The device of claim 11, wherein the analysis further includes:

a sensing device including a plurality of sensors;

wherein the controller provides a 1-D sensing information each time it senses with the sensors, the controller further including the following operations;

constituting a second 2-D sensing information from a plurality of 1-D sensing information; and

performing a conversion on positive or negative values of the second 2-D sensing information to generate the first 2-D sensing information, the conversion selected from one of the group consisting of;

converting negative to positive values, converting positive to negative values, converting positive to zero values, and converting negative to zero values.

13. The device of claim 11, further comprising:

a sensing device including a plurality of sensors;

wherein the controller provides a 1-D sensing information each time it senses with the sensors, the first 2-D sensing information constituted by a plurality of the 1-D sensing information.

14. The device of claim 13, wherein the analysis further includes:

converting each touch related sensing information with inner lower values within outer high values into touch related sensing information with inner higher values within outer low values.

15. The device of claim 13, wherein the analysis further includes:

converting each touch related sensing information with a plurality of peaks into touch related sensing information with inner higher values within outer low values based on a corresponding portion in the second 2-D sensing information.

16. The device of claim 11, wherein the analysis further includes:

analyzing the first 2-D sensing information to determine each touch related sensing information with inner higher values within lower high values in the first 2-D sensing information.

17. The device of claim 16, wherein the analysis further includes:

analyzing the contour of each touch related sensing information; and

outputting geometric information based on each contour, wherein representation of the geometric information is selected from one or a combination of the following representations;

circle, oval, rectangle and polygon.

18. The device of claim 16, wherein the analysis further includes:

calculating a centroid location or a geometric center of each touch related sensing information as a touch location.

19. The device of claim 16, further comprising:

converting touch related sensing information with two peaks into touch related sensing information with one peak.

20. The device of claim 11, wherein the 2-D sensing information includes:

a plurality of dual differences;

a plurality of positive and negative values generated from the plurality of dual differences, wherein all the negative values of these dual differences are converted into zero values or all the positive values of these dual differences are converted into zero values;

or

a plurality of positive and negative values generated from a plurality of differences, wherein all the negative values of these differences are converted into positive values or all the positive values of these differences are converted into negative values.

21. The device of claim 11, wherein each dual difference is based on signals of three sensors, wherein the three sensors are adjacent or non-adjacent.

22. The device of claim 11, further comprising:

a sensing device including a plurality of sensors,

wherein the controller provides a 1-D sensing information each time it senses with the sensors, and the host generating the 2-D sensing information from the 1-D sensing information provided a plurality of times by the controller.

23. The device of claim 11, further comprising:

a sensing device including a plurality of sensors,

wherein the controller provides a 1-D sensing information each time it senses with the sensors, and the host performing the analysis, and the controller performing the sensing with the sensors a plurality of times to provide the first 2-D sensing information.