POSITION-SENSING PANEL

• US 20120062472A1
• Filed: 09/13/2010
• Published: 03/15/2012
• Est. Priority Date: 09/13/2010
• Status: Active Grant

• Current Assignee: Neodrón Limited (Atlantic IP Services Limited)
• Original Assignee: QRG Limited
• Inventors: YILMAZ, Esat
• Granted Patent: US 9,252,768 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• 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: H03K 17/9622 using a plurality of detectors, e.g. keyboard
• CPC Class Codes: H03K 2217/960775 Emitter-receiver or "fringe" type detection, i.e. one or more field emitting electrodes and corresponding one or more receiving electrodes

Abstract

A touch position sensing panel including first and second electrode layers shaped with repeating patterns. Each electrode pattern is interpolated with adjacent electrode patterns.

Claims

1. A touch position-sensing panel comprising:

a sensing area;

a plurality of first electrodes formed of a conductive material; and

a plurality of second electrodes formed of a conductive material, wherein;

the plurality of first electrodes are arranged in a first direction,

the plurality of second electrodes are arranged in a second direction different from the first direction such that the first and second electrodes overlap in the sensing area,

each of the plurality of first electrodes has an outer boundary shaped as a repeating pattern having a first repeat length and a first width, and

each of the plurality of second electrodes has an outer boundary shaped as a repeating pattern having a second repeat length and a second width, wherein;

the ratio of the first repeat length of the first electrodes to the second width of the second electrodes is a first rational number, and

the ratio of the second repeat length of the second electrode to the first width of the first electrode is a second rational number.

2. The touch position-sensing panel of claim 1, wherein the first repeat length and the first width are different.

3. The touch position-sensing panel of claim 1, wherein the second repeat length and the second width are different.

4. The touch position-sensing panel of claim 1, wherein the first and second directions are perpendicular to each other.

5. The touch position-sensing panel of claim 1, wherein the first repeat length is 1 and the second width is 3.

6. The touch position-sensing panel of claim 1, wherein the first repeat length is 7 and the second width is 8.

7. A touch position-sensing panel comprising:

a sensing area;

a plurality of first electrodes formed of a conductive material; and

a plurality of second electrodes formed of a conductive material, wherein;

the plurality of first electrodes are arranged in a first direction,

the plurality of second electrodes are arranged in a second direction different from the first direction such that the first and second electrodes overlap in the sensing area,

each first electrode has an outer boundary encompassing a first central region having a striped shape in the first direction, and over two corresponding first and second side regions on opposite sides of and parallel to, the first central region,

wherein the outer boundary of the first electrodes encompasses a portion of the first central region, and a portion of the corresponding first and second side regions, and

the outer boundary of each of the first electrodes has an interpolated pattern.

8. The touch position-sensing panel of claim 7, wherein:

the plurality of second electrodes have an outer boundary encompassing a second central region having a striped shape in the second direction, and two corresponding first and second side regions on opposite sides of, and parallel to, the second central region,

the outer boundary of each second electrode encompasses a portion of the second central region, and a portion of the corresponding first and second side regions, except for a gap that is formed between the adjacent electrodes, and

the outer boundary of each the second electrodes has an interpolated pattern.

9. The touch position-sensing panel of claim 7, wherein the first electrodes are arranged such that the outer boundary of each first electrode encompasses all of the first central region and the combined outer boundaries of two adjacent first electrodes encompass all of the first side region, except for a gap between the edges of the adjacent side regions.

10. The touch position-sensing panel of claim 8, wherein the second electrodes are arranged such that the outer boundary of each first electrode encompasses all of the first central region and the combined outer boundaries of the two adjacent second electrodes encompass all of the second side region, except for a gap between the edges of the adjacent side regions.

11. The touch position-sensing panel of claim 9, wherein an area of the first side region of the first electrode is equal to an area of the first center region of the first electrode.

12. The touch position-sensing panel of claim 7, wherein the first and second directions are perpendicular to each other.

13. The touch position-sensing panel of claim 7, wherein the first electrodes are drive electrodes comprised of ITO.

14. The touch position-sensing panel of claim 7, wherein the first electrodes are sense electrodes comprised of mesh patterns of a conductive metal.

15. The touch position-sensing panel of claim 7, wherein the second electrodes are sense electrodes comprised of mesh patterns of a conductive metal.

16. The touch position-sensing panel of claim 7, wherein each outer boundary of the plurality of first electrodes are shaped as a repeating pattern having a first repeat length and a first width, and

each of the plurality of second electrodes have an outer boundary shaped as a repeating pattern having a second repeat length and a second width, wherein:

the ratio of the first repeat length of the first electrodes to the second width of the second electrodes is a first rational number, and

the ratio of the second repeat length of the second electrode to the first width of the first electrode is a second rational number.

17. The touch position-sensing panel of claim 16, wherein the first repeat length is 1 and the second width is 3.

18. The touch position-sensing panel of claim 16, wherein the first repeat length is 7 and the second width is 8.

19. The touch position-sensing panel of claim 8, wherein the portion of the corresponding first and second side regions encompassed by the first electrode is equal to the portion of the corresponding first and second side regions encompassed by the second electrode.

20. The touch position-sensing panel of claim 16, wherein an end of an outer boundary of one of the first electrodes is aligned with a side edge of an outer boundary for one of the second electrodes, and an end of the outer boundary of the second electrode is aligned with a side edge of an outer boundary of the first electrode.