METHOD AND DEVICE FOR CONVERTING SENSING INFORMATION

• US 20120068954A1
• Filed: 11/30/2011
• Published: 03/22/2012
• 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
• Granted Patent: US 8,537,131 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 3/04182 Filtering of noise external to the device and not generated by digitiser components
• 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
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

The method and device for converting sensing information are disclosed. A dual-differential sensing information is obtained and then converted into a sensing information, wherein the touch related sensing information having two peaks in a pair of zero-crossings is converted into quasi signal values.

Claims

1. A method for converting sensing information, comprising:

obtaining a dual-differential sensing information;

detecting each touch related sensing information having two peaks in a pair of zero-crossings in the dual-differential sensing information; and

converting the dual-differential sensing information into a sensing information with quasi all signal values, including;

converting each touch related sensing information having two peaks in a pair of zero-crossings into signal values.

2. The method of claim 1, wherein converting the dual-differential sensing information into the sensing information with quasi all signal values further includes:

converting all negative values into zero values.

3. The method of claim 1, further comprising:

obtaining a differential sensing information which includes a plurality of differences; and

converting the differential sensing information into the dual-differential sensing information, where each value of the dual-differential sensing information is the difference or sum of a pair of differences.

4. The method of claim 3, where converting each touch related sensing information having two peaks in a pair of zero-crossings into signal values includes:

converting each touch related sensing information having two peaks in a pair of zero-crossings into signal values based on a corresponding portion in the differential sensing information.

5. The method of claim 4, wherein each signal value corresponds to a signal in a plurality of sensors, and each difference corresponds to a signal difference between a pair of sensors of a plurality of sensors.

6. The method of claim 1, further comprising:

obtaining a sensing information that includes a plurality of signal values; and

converting the sensing information into the dual-differential sensing information, where each value of the dual-differential sensing information is generated based on three signal values.

7. The method of claim 1, where converting each touch related sensing information having two peaks in a pair of zero-crossings into signal values includes replacing each touch related sensing information having two peaks in a pair of zero-crossings with on a corresponding portion in the sensing information.

8. The method of claim 1, further comprising:

providing a method for analyzing touches in a sensing information with all signal values to analyze the sensing information with quasi all signal values.

9. A device for converting sensing information, comprising a controller or a host for performing at least the following operations:

obtaining a dual-differential sensing information;

detecting each touch related sensing information having two peaks in a pair of zero-crossings in the dual-differential sensing information; and

converting the dual-differential sensing information into a sensing information with quasi all signal values, including;

converting each touch related sensing information having two peaks in a pair of zero-crossings into signal values.

10. The device of claim 9, wherein converting the dual-differential sensing information into the sensing information with quasi all signal values further includes:

converting all negative values into zero values.

11. The device of claim 9, further comprising:

obtaining a differential sensing information which includes a plurality of differences; and

converting the differential sensing information into the dual-differential sensing information, where each value of the dual-differential sensing information is the difference or sum of a pair of differences.

12. The device of claim 11, where converting each touch related sensing information having two peaks in a pair of zero-crossings into signal values includes:

converting each touch related sensing information having two peaks in a pair of zero-crossings into signal values based on a corresponding portion in the differential sensing information.

13. The device of claim 12, wherein each signal value corresponds to a signal in a plurality of sensors, and each difference corresponds to a signal difference between a pair of sensors of a plurality of sensors.

14. The device of claim 9, further comprising:

obtaining a sensing information that includes a plurality of signal values; and

converting the sensing information into the dual-differential sensing information, where each value of the dual-differential sensing information is generated based on three signal values.

15. The device of claim 9, where converting each touch related sensing information having two peaks in a pair of zero-crossings into signal values includes replacing each touch related sensing information having two peaks in a pair of zero-crossings with on a corresponding portion in the sensing information.

16. The device of claim 9, further comprising:

providing a device for analyzing touches in a sensing information with all signal values to analyze the sensing information with quasi all signal values.