Mutual capacitive touch panel having double-layer electrode structure
The present invention provides a mutual capacitive touch panel including a first conductive layer and a second conductive layer. The first conductive layer includes a plurality of electrodes arranged in an array and a plurality of connecting line segments. In each column of the array, the electrodes in the ((N×M)-1) th row are electrically connected to one another through some of the connecting line segments to form a first electrode series, and the electrodes in the (N×M) th row are electrically connected to one another through some of the connecting line segments to form a second electrode series. The second conductive layer includes a plurality of electrode strips extending along a row direction of the array and respectively overlapping the electrodes located at the corresponding row. Each electrode strip includes a plurality of shielding portions, each of which overlaps one corresponding of the connecting line segments.
1. A mutual capacitive touch panel, having a touch region and a border region, the mutual capacitive touch panel comprising:
a first conductive layer, comprising:
a plurality of electrodes, arranged in an array, located in the touch region; wherein, in each column of the array, the electrodes located in an ((N×M)-1) th row are electrically connected to one another to form a first electrode series, and the electrodes located in an (N×M) th row are electrically connected to one another to form a second electrode series, where N is a positive integer greater than or equal to 2, and M is a positive integer greater than or equal to 1; and
a plurality of connecting line segments, comprising a plurality of first connecting line segments and a plurality of second line segments, each of the first connecting line segment connecting two adjacent of the electrodes in one corresponding of the first electrode series, each of the second connecting line segments connecting two adjacent of the electrodes in one corresponding of the second electrode series;
a second conductive layer, provided on the first conductive layer, comprising M electrode strip groups, the M electrode strip groups insulated from one another and sequentially arranged in the touch region along a column direction of the array, each of the electrode strip groups comprising N electrode strips, each of the electrode strips extending along a row direction of the array and overlapping, in a perpendicular projection direction, the electrodes of the corresponding row; wherein, each of the electrode strips comprises a plurality of first strip portions and a plurality of shielding portions, the first strip portions and the shielding portions are alternatingly connected in series along the row direction of the array, each of the first strip portion is provided correspondingly to one of the electrodes, each of the shielding portions overlaps, in the perpendicular projection direction, one corresponding of the connecting line segments, and a width of the shielding portions in the column direction of the array is greater than a width of the first strip portions in the column direction of the array; and
an insulation layer, provided between the first conductive layer and the second conductive layer.
2. The mutual capacitive touch panel according to claim 1 , further comprising a plurality of conductive lines, which are provided in the border region and electrically connect the electrode strips of the electrode strip groups, respectively.
3. The mutual capacitive touch panel according to claim 1 , wherein the electrodes comprise M first electrodes and M second electrodes, the first electrodes are located in the ((N×M)-1) th row and the second electrodes are located in the (N×M) th row, the electrode strips of each of the electrode strips comprise a first electrode strip and a second electrode strip, and one of the shielding portions of one of the first electrode strips overlaps one of the second connecting line segments.
4. The mutual capacitive touch panel according to claim 3 , wherein the one of the shielding portions of the one of the first electrode strips overlaps two adjacent first connecting line segments connected to one of the first electrodes.
5. The mutual capacitive touch panel according to claim 3 , wherein the one of the shielding portions of one of the second electrode strips overlaps one of the first connecting line segments.
6. The mutual capacitive touch panel according to claim 5 , wherein the one of the shielding portions of one of the second electrode strips overlaps two adjacent second line segments connected to one of the second electrodes.
7. The mutual capacitive touch panel according to claim 1 , wherein the width of the shielding portions in the column direction of the array is greater than or equal to 10% of a width of the electrodes in the column direction of the array.
8. The mutual capacitive touch panel according to claim 1 , wherein a width of the shielding portions in the column direction of the array is greater than or equal to 50% of a width of the electrodes in the column direction of the array.
9. The mutual capacitive touch panel according to claim 1 , wherein no floating electrode is present between two adjacent shielding portions between the electrodes located in two adjacent columns.
10. The mutual capacitive touch panel according to claim 1 , wherein in one of the electrode strip groups, two adjacent shielding portions between the electrodes located in two adjacent columns are separated from each other.
11. The mutual capacitive touch panel according to claim 1 , wherein in one of the electrode strip groups, two adjacent shielding portions between the electrodes located in two adjacent columns are connected to each other.
12. The mutual capacitive touch panel according to claim 1 , wherein each of the electrode strips further comprises a plurality of branch portions extending out from two sides of each first strip portion, such that each first strip portion and a part of the branch portions form a grating electrode.
13. The mutual capacitive touch panel according to claim 1 , wherein each of the electrode strips further comprises a plurality of second strip portions, a plurality of connecting portions and a plurality of branch portions, and one of the first strip portions, one of the second strip portions, two of the connecting portions and four of the branch portions form a grid electrode.
14. The mutual capacitive touch panel according to claim 1 , wherein each of the electrodes comprises a slit that overlaps one corresponding of the first strip portions.
15. The mutual capacitive touch panel according to claim 1 , wherein each of the first electrode series and the second electrode series is a driving electrode, and each of the electrode strip groups is a sensing electrode.
16. The mutual capacitive touch panel according to claim 1 , wherein each of the first electrode series and the second electrode series is a sensing electrode, and each of the electrode strip groups is a driving electrode.