CAPACITIVE TOUCH PANEL SENSOR FOR MITIGATING EFFECTS OF A FLOATING CONDITION

• US 20140104221A1
• Filed: 10/11/2012
• Published: 04/17/2014
• Est. Priority Date: 10/11/2012
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Maxim Integrated Products, Inc. (Analog Devices, Inc.)
• Inventors: Shen, Guozhong, Li, Hongyu, Lee, Ronald, Mei, Xiaodan
• Application Number:
  US13/650,059
• Publication Number:
  US 20140104221A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
• CPC Class Codes: Y10T 29/49105 Switch making

Abstract

A capacitive touch panel includes elongated drive electrodes arranged next to one another and elongated sense electrodes arranged next to one another across the elongated drive electrodes. One or more of the elongated drive electrodes defines a notch along an edge of a drive electrode, where the notch is positioned between adjacent sense electrodes. In some embodiments, the drive electrode also defines a generally opposing notch on an opposing edge of the drive electrode. Additionally, one or more of the elongated sense electrodes can define an elongated aperture, and a second notch can be defined along the edge of the drive electrode proximate to the elongated aperture.

Claims

1. A mutual capacitance projected capacitive touch panel comprising:

a plurality of elongated drive electrodes arranged next to one another and defining a notch along an edge of a drive electrode of the plurality of elongated drive electrodes; and

a plurality of elongated sense electrodes arranged next to one another across the plurality of elongated drive electrodes, the notch defined in the edge of the drive electrode of the plurality of elongated drive electrodes positioned between adjacent sense electrodes of the plurality of elongated sense electrodes.

2. The mutual capacitance projected capacitive touch panel as recited in claim 1, wherein the drive electrode of the plurality of elongated drive electrodes defines a generally opposing notch on an opposing edge of the drive electrode.

3. The mutual capacitance projected capacitive touch panel as recited in claim 1, wherein a sense electrode of the plurality of elongated sense electrodes defines an elongated aperture.

4. The mutual capacitance projected capacitive touch panel as recited in claim 3, wherein a second notch is defined along the edge of the drive electrode of the plurality of elongated drive electrodes proximate to the elongated aperture defined by the sense electrode.

5. The mutual capacitance projected capacitive touch panel as recited in claim 3, wherein a sense electrode of the plurality of elongated sense electrodes defines a second elongated aperture.

6. The mutual capacitance projected capacitive touch panel as recited in claim 5, wherein a second notch is defined along the edge of the drive electrode of the plurality of elongated drive electrodes proximate to at least one of the elongated aperture or the second elongated aperture defined by the sense electrode.

7. The mutual capacitance projected capacitive touch panel as recited in claim 1, wherein the plurality of elongated drive electrodes and the plurality of elongated sense electrodes are disposed on a single layer, and a plurality of jumpers is used to connect at least one of the plurality of drive electrodes or the plurality of sense electrodes.

8. A method of forming a mutual capacitance projected capacitive touch panel comprising:

forming a plurality of elongated drive electrodes arranged next to one another and defining a notch along an edge of a drive electrode of the plurality of elongated drive electrodes; and

forming a plurality of elongated sense electrodes arranged next to one another across the plurality of elongated drive electrodes, the notch defined in the edge of the drive electrode of the plurality of elongated drive electrodes positioned between adjacent sense electrodes of the plurality of elongated sense electrodes.

9. The method as recited in claim 8, wherein the drive electrode of the plurality of elongated drive electrodes defines a generally opposing notch on an opposing edge of the drive electrode.

10. The method as recited in claim 8, wherein a sense electrode of the plurality of elongated sense electrodes defines an elongated aperture.

11. The method as recited in claim 10, wherein a second notch is defined along the edge of the drive electrode of the plurality of elongated drive electrodes proximate to the elongated aperture defined by the sense electrode.

12. The method as recited in claim 10, wherein a sense electrode of the plurality of elongated sense electrodes defines a second elongated aperture.

13. The method as recited in claim 12, wherein a second notch is defined along the edge of the drive electrode of the plurality of elongated drive electrodes proximate to at least one of the elongated aperture or the second elongated aperture defined by the sense electrode.

14. The method as recited in claim 8, wherein the plurality of elongated drive electrodes and the plurality of elongated sense electrodes are disposed on a single layer, and the method further comprises connecting a plurality of jumpers to at least one of the plurality of drive electrodes or the plurality of sense electrodes.

15. A mutual capacitance projected capacitive touch panel comprising:

a plurality of elongated drive electrodes arranged next to one another and defining a notch along an edge of a drive electrode of the plurality of elongated drive electrodes and a generally opposing notch on an opposing edge of the drive electrode; and

a plurality of elongated sense electrodes arranged next to one another across the plurality of elongated drive electrodes, the notch defined in the edge of the drive electrode of the plurality of elongated drive electrodes positioned between adjacent sense electrodes of the plurality of elongated sense electrodes.

16. The mutual capacitance projected capacitive touch panel as recited in claim 15, wherein a sense electrode of the plurality of elongated sense electrodes defines an elongated aperture.

17. The mutual capacitance projected capacitive touch panel as recited in claim 16, wherein a second notch is defined along the edge of the drive electrode of the plurality of elongated drive electrodes proximate to the elongated aperture defined by the sense electrode.

18. The mutual capacitance projected capacitive touch panel as recited in claim 16, wherein a sense electrode of the plurality of elongated sense electrodes defines a second elongated aperture.

19. The mutual capacitance projected capacitive touch panel as recited in claim 18, wherein a second notch is defined along the edge of the drive electrode of the plurality of elongated drive electrodes proximate to at least one of the elongated aperture or the second elongated aperture defined by the sense electrode.

20. The mutual capacitance projected capacitive touch panel as recited in claim 15, wherein the plurality of elongated drive electrodes and the plurality of elongated sense electrodes are disposed on a single layer, and a plurality of jumpers is used to connect at least one of the plurality of drive electrodes or the plurality of sense electrodes.