SENSING ELECTRODE AND SENSING ELECTRODE UNIT

• US 20150193081A1
• Filed: 12/29/2014
• Published: 07/09/2015
• Est. Priority Date: 01/03/2014
• Status: Abandoned Application

• Current Assignee: MStar Semiconductor Incorporated (MediaTek, Inc.)
• Original Assignee: MStar Semiconductor Incorporated (MediaTek, Inc.)
• Inventors: Liu, Tzu-Wei
• Application Number:
  US14/583,998
• Publication Number:
  US 20150193081A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04108 Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04182 Filtering of noise external to the device and not generated by digitiser components
• CPC Class Codes: G06F 3/0443 using a single layer of sensing 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

Abstract

A sensing electrode unit is provided. The sensing electrode, repeatedly arranged to form a part of a sensing electrode, includes a first electrode, a second electrode having a planar contour corresponding to that of the first electrode, and a third electrode. At least one part of the third electrode is parallel to one side of the first electrode and one side of the second electrode.

Claims

1. A sensing electrode unit, repeatedly arranged to form a part of a touch panel, the sensing electrode unit comprising:

a first electrode;

a second electrode, having a planar contour corresponding to that of the first electrode; and

a third electrode, at least one part of the third electrode being parallel to one side of the first electrode and one side of the second electrode;

wherein the first electrode and the second electrode are used to sense a proximity event, and the third electrode is used to sense noise.

2. The sensing electrode unit according to claim 1, wherein each of the first electrode and second electrode comprises two perpendicular sides.

3. The sensing electrode unit according to claim 2, wherein a distance from the at least one part of the third electrode to the first electrode is equal to a distance from the at least one part of the third electrode to the second electrode.

4. The sensing electrode unit according to claim 1, wherein the remaining part of the third electrode is distributed along one other side of the second electrode.

5. The sensing electrode unit according to claim 1, wherein each of the first electrode and second electrode comprises two perpendicular sides, a boundary of the first electrode is parallel and corresponding to a boundary of the second electrode, and the third electrode is distributed along the boundary of the first electrode and the boundary of the second electrode.

6. The sensing electrode unit according to claim 5, wherein a distance from the third electrode to the first electrode is equal to a distance from the third electrode to the second electrode.

7. The sensing electrode unit according to claim 1, wherein the third electrode is distributed along two perpendicular sides of the sensing electrode unit.

8. The sensing electrode unit according to claim 1, wherein the noise is deducted from a sensing amount detected by the first electrode and the second electrode.

9. The sensing electrode unit according to claim 1, wherein each angle of a planar contour of the third electrode is greater than or equal to a right angle.

10. The sensing electrode unit according to claim 1, wherein the first electrode, the second electrode and the third electrode are connected to a first conducting wire, a second conducting wire and a third conducting wire along a same direction of the sensing electrode unit.

11. A touch panel, comprising:

a first sensing electrode unit, comprising;

a first electrode;

a second electrode, having a planar contour corresponding to that of the first electrode; and

a third electrode, at least one part of the third electrode being parallel to one side of the first electrode and one side of the second electrode; and

a second sensing electrode unit, comprising;

a fourth electrode, having a planar contour different from those of the first electrode and the second electrode;

a fifth electrode, having a planar contour corresponding to that of the fifth electrode; and

a sixth electrode, at least one part of the sixth electrode being parallel to one side of the fourth electrode and one side of the fifth electrode;

wherein the first electrode, the second electrode, the fourth electrode and the fifth electrode are used to sense a proximity event, and the third electrode and the sixth electrode are used to sense noise.

12. A touch panel, comprising:

a first sensing electrode group, comprising a plurality of first sensing electrode units; and

a second sensing electrode group, parallel to the first sensing electrode group, comprising a plurality of first sensing electrode units;

wherein, each of the first sensing electrode units comprises;

a first electrode;

a second electrode, having a planar contour corresponding to that of the first electrode; and

a third electrode, at least one part of the third electrode being parallel to one side of the first electrode and one side of the second electrode;

wherein the first electrode and the second electrode are used to sense a proximity event, and the third electrode is used to sense noise.

13. The sensing electrode according to claim 12, wherein the first sensing electrode group further comprises at least one second sensing electrode unit, the second sensing electrode group further comprises at least one of the second sensing electrode unit, each of the second sensing electrode units comprises:

a fourth electrode, having a planar contour different from those of the first electrode and the second electrode;

a fifth electrode, having a planar contour corresponding to that of the fifth electrode; and

a sixth electrode, at least one part of the sixth electrode being parallel to one side of the fourth electrode and one side of the fifth electrode;

wherein the fourth electrode and the fifth electrode are used to sense a proximity event, and the sixth electrode is used to sense noise.

14. The sensing electrode according to claim 12, wherein the electrodes of the first sensing electrode group are respectively connected to respective conducting wires via a first side of the sensing electrodes, and the electrodes of the second sensing electrode group are respectively connected to respective connecting wires via a second side of the sensing electrodes, and the first side is opposite the second side.

15. The sensing electrode according to claim 12, wherein the third electrode detects noise, and the noise is deducted from a plurality of sensing amounts detected by the first electrode and the second electrode.