TOUCH SENSING METHOD AND ELECTRONIC APPARATUS USING THE SAME

• US 20130093712A1
• Filed: 10/14/2011
• Published: 04/18/2013
• Est. Priority Date: 10/14/2011
• Status: Active Grant

• Current Assignee: Himax Technologies Ltd. (Himax Technologies Incorporated)
• Original Assignee: Himax Technologies Ltd. (Himax Technologies Incorporated)
• Inventors: Liu, Jui-Ming, Chang, Chung-Wen, Tai, Shen-Feng, Yang, Feng-Wei
• Granted Patent: US 8,659,566 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/041662 using alternate mutual and self-capacitive scanning
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04186 Touch location disambiguation
• CPC Class Codes: G06F 3/044 by capacitive means

Abstract

A touch sensing method adapted for an electronic apparatus including a touch panel is provided. The touch sensing method includes the following steps: driving the touch panel by a mutual capacitance mode and a self capacitance mode; sensing a gesture applied on the touch panel, wherein the gesture forms at least one touch area on the touch panel; determining at least one geometric center of the at least one touch area based on self-mode data obtained in the self capacitance mode; and determining at least one touch location associated with the gesture on the touch panel based on the at least one geometric center of the at least one touch area. Furthermore, an electronic apparatus to which the foregoing touch sensing method is applied is also provided.

Claims

1. A touch sensing method, adapted for an electronic apparatus comprising a touch panel, the touch sensing method comprising:

driving the touch panel by a mutual capacitance mode and a self capacitance mode;

sensing a gesture applied on the touch panel, wherein the gesture forms at least one touch area on the touch panel;

determining at least one geometric center of the at least one touch area based on a self-mode data obtained in the self capacitance mode; and

determining at least one touch location associated with the gesture on the touch panel based on the at least one geometric center of the at least one touch area.

2. The touch sensing method as claimed in claim 1, wherein the electronic apparatus is not connected with a power core.

3. The touch sensing method as claimed in claim 1, wherein the at least one touch geometric center is located inside the at least one touch area.

4. The touch sensing method as claimed in claim 1, wherein the gesture forms a plurality of touch areas on the touch panel, each of the plurality of touch areas has a geometric center.

5. The touch sensing method as claimed in claim 4, wherein the step of determining the at least one geometric center of the at least one touch area comprises:

determining the geometric centers of the plurality of touch areas based on the self-mode data obtained in the self capacitance mode or a mutual-mode data obtained in the mutual capacitance mode.

6. The touch sensing method as claimed in claim 5, wherein the step of determining the at least one touch location associated with the gesture comprises:

determining the touch locations associated with the gesture on the touch panel based on the geometric centers of the plurality of touch areas.

7. The touch sensing method as claimed in claim 4, wherein the plurality of touch areas separate from each other.

8. An electronic apparatus, comprising:

a touch panel sensing a gesture applied thereon, wherein the gesture forms at least one touch area on the touch panel;

a touch panel driving module connected to the touch panel and driving the touch panel by a mutual capacitance mode and a self capacitance mode; and

a touch sensing controller connected to the touch panel and the touch panel driving module, determining at least one geometric center of the at least one touch area based on a self-mode data obtained in the self capacitance mode, and determining at least one touch location associated with the gesture on the touch panel based on the at least one geometric center of the at least one touch area.

9. The electronic apparatus as claimed in claim 8, wherein the electronic apparatus is not connected with a power core.

10. The electronic apparatus as claimed in claim 8, wherein the at least one geometric center is located inside the at least one touch area.

11. The electronic apparatus as claimed in claim 8, wherein the gesture forms a plurality of touch areas on the touch panel, each of the plurality of touch areas has a second geometric center.

12. The electronic apparatus as claimed in claim 11, wherein the touch sensing controller determines the geometric centers of the plurality of touch areas based on the self-mode data obtained in the self capacitance mode or a mutual-mode data obtained in the mutual capacitance mode.

13. The electronic apparatus as claimed in claim 12, wherein the touch sensing controller determines the touch locations associated with the gesture on the touch panel based on the geometric centers of the plurality of touch areas.

14. The electronic apparatus as claimed in claim 11, wherein the plurality of touch areas separate from each other.