Method and device for analyzing two-dimension sensing information

• US 9,081,441 B2
• Filed: 12/07/2011
• Issued: 07/14/2015
• Est. Priority Date: 10/09/2009
• Status: Active Grant

• Current Assignee: eGalax_eMPIA Technology Inc.
• Original Assignee: eGalax_eMPIA Technology Inc.
• Inventors: Chang, Chin-Fu, Lee, Cheng-Han, Tang, Chi-Hao, Ho, Shun-Lung
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): Figueroa-Gibson, Gloryvid
• Application Number:
  US13/313,538
• Publication Number:
  US 20120075250A1
• Time in Patent Office: 1,315 Days
• Field of Search: 345156-184, 178 1801- 1806, 324/658, 340/815.4, 702/150
• US Class Current: 1/1
• 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

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

Claims

1. A method for analyzing two-dimension (2D) differential sensing information, executed by a controller from a non-transitory computer-readable storage medium, comprising:

obtaining a 2D differential sensing information regarded as an image constructed by a plurality of 1D differential sensing information values, wherein the plurality of 1D differential sensing information values are arranged in parallel with each other and each of the plurality of 1D differential sensing information values has a plurality of differences;

converting all negative values of the 2D differential sensing information into positive values to become a 2D sensing information comprising at least one partial 2D sensing information representation with inner low values within outer high values; and

analyzing the 2D sensing information to determine each partial 2D sensing information representation with inner low values within outer high values corresponding to each touch of at least one external object in the 2D sensing information.

2. The method for analyzing 2D differential sensing information of claim 1, wherein the analyzing further comprises:

analyzing the 2D sensing information to determine a plurality of partial sensing information values with inner high values within outer low values in the 2D sensing information.

3. The method for analyzing 2D differential sensing information of claim 2, wherein the analyzing further comprises:

analyzing a profile of each touch related sensing information representation; and

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

circle, oval, rectangle or polygon.

4. The method for analyzing 2D differential sensing information of claim 2, wherein the analyzing further comprises:

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

5. The method for analyzing 2D differential sensing information of claim 1, further comprising:

converting each partial 2D sensing information representation with inner low values within outer high values into a partial 2D sensing information representation with inner high values within outer low values.

6. The method for analyzing 2D differential sensing information of claim 1, further comprising:

converting each touch related sensing information representation with two peaks into a touch related sensing information representation with a single peak.

7. The method for analyzing 2D differential sensing information of claim 1, wherein each difference of each 1D differential sensing information value is generated based on the difference between signals of a pair of sensors in a plurality of sensors.

8. The method for analyzing 2D differential sensing information of claim 1, further comprising:

obtaining a plurality of 1D sensing information values, wherein each 1D sensing information value is generated based on signals of a plurality of sensors; and

converting these 1D sensing information values into the 2D differential sensing information, wherein each value of the 2D differential sensing information is generated based on a pair of values of these 1D sensing information values.

9. The method for analyzing 2D differential sensing information of claim 8, wherein each 1D sensing information value includes a plurality of dual differences, and each dual difference is generated based on signals of three sensors of these sensors.

10. The method for analyzing 2D differential sensing information of claim 9, wherein each 1D sensing information value corresponds to a difference, each difference is an accumulation of a corresponding dual difference and all other dual differences preceding the corresponding dual difference in the 1D sensing information values.

11. A device for analyzing two-dimension (2D) differential sensing information, comprising one of a controller and a host for performing an analysis, comprising:

obtaining a 2D differential sensing information regarded as an image constructed by a plurality of 1D differential sensing information values, wherein the plurality of 1D differential sensing information values are arranged in parallel with each other and each of the plurality of 1D differential sensing information values has a plurality of differences;

converting all negative values of the 2D differential sensing information into positive values to become a 2D sensing information comprising at least one partial 2D sensing information representation with inner low values within outer high values; and

analyzing the 2D sensing information to determine each partial 2D sensing information representation with inner low values within outer high values corresponding to each touch of at least one external object in the 2D sensing information.

12. The device for analyzing 2D differential sensing information of claim 11, wherein the analyzing further comprises:

analyzing the 2D sensing information to determine a plurality of partial sensing information values with inner high values within outer low values in the 2D sensing information.

13. The device for analyzing 2D differential sensing information of claim 12, wherein the analyzing further comprises:

analyzing a profile of each touch related sensing information representation; and

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

circle, oval, rectangle or polygon.

14. The device for analyzing 2D differential sensing information of claim 12, wherein the analyzing further comprises:

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

15. The device for analyzing 2D differential sensing information of claim 11, wherein one of the controller and the host further comprises performing the following operation:

converting each partial sensing information representation with inner low values within outer high values into a partial sensing information representation with inner high values within outer low values.

16. The device for analyzing 2D differential sensing information of claim 11, wherein one of the controller and the host further comprises performing the following operation:

converting each touch related sensing information representation with two peaks into a touch related sensing information representation with a single peak.

17. The device for analyzing 2D differential sensing information of claim 11, further comprising:

a sensing device including a plurality of sensors;

wherein the controller provides a one-dimension (1D) dual-differential sensing information each time the controller senses the sensors, and the 2D differential sensing information is constituted by these 1D differential sensing information values, each difference of each 1D differential sensing information value is generated based on the difference between signals of a pair of sensors in these sensors.

18. The device for analyzing 2D differential sensing information of claim 11, further comprising:

a sensing device including a plurality of sensors;

wherein the controller provides a 1D dual-differential sensing information each time the controller senses the sensors.

19. The device for analyzing 2D differential sensing information of claim 11, wherein one of the controller and the host further comprises performing the following operation:

obtaining a plurality of 1D sensing information values, wherein each 1D sensing information value is generated based on signals of a plurality of sensors; and

converting these 1D sensing information values into the 2D differential sensing information, wherein each value of the 2D differential sensing information is generated based on a pair of values of these 1D sensing information values, and each 1D sensing information value includes a plurality of dual differences, and each dual difference is generated based on signals of three sensors of these sensors.

20. The device for analyzing 2D differential sensing information of claim 11, wherein one of the controller and the host further comprises performing the following operation:

obtaining a plurality of 1D sensing information values, wherein each 1D sensing information value is generated based on signals of a plurality of sensors; and

converting these 1D sensing information values into the 2D differential sensing information, wherein each 1D sensing information value corresponds to a difference, each difference is an accumulation of a corresponding dual difference and all other dual differences preceding the corresponding dual difference in the 1D sensing information values.