Touch structure and touch display panel

1. A touch structure comprising a first touch electrode and a second touch electrode,

wherein the first touch electrode extends along a first direction, the second touch electrode extends along a second direction, and the first direction intersects with the second direction;

the first touch electrode comprises a plurality of first touch electrode portions connected in series, each of the first touch electrode portions comprises a first main body portion and a plurality of first finger portions, and the plurality of first finger portions protrude from the first main body portion;

at least one of the plurality of first touch electrode portions comprises a dummy electrode, and at least a part of the dummy electrode is in at least one first finger portion of the at least one of the plurality of first touch electrode portions;

the at least one first finger portion of the at least one of the plurality of first touch electrode portions comprises a first finger effective electrode, the dummy electrode is insulated from the first finger effective electrode, and the first finger effective electrode is connected with the first main body portion of the at least one first touch electrode portion;

the at least a part of the dummy electrode in the at least one first finger portion is a first finger dummy electrode, and the first finger dummy electrode is inside the first finger effective electrode;

the dummy electrode further comprises a first main dummy electrode in the first main body portion of the at least one of the plurality first touch electrode portions, the first main body portion of the at least one of the plurality first touch electrode portions comprises a first main effective electrode, and the first main dummy electrode is insulated from the first main effective electrode; in the at least one of the plurality first touch electrode portions, the first main effective electrode is electrically connected with the first finger effective electrode;

the first main dummy electrode comprises a dummy main body portion and a plurality of dummy finger portions, the plurality of dummy finger portions protrude from the dummy main body portion, the plurality of dummy finger portions are in a same layer as the first main effective electrode, and are interdigitated with and insulated from the first main effective electrode;

the dummy main body portion is in a shape of rectangle, and the plurality of dummy finger portions protrude from four sides of the rectangle;

the first main dummy electrode further comprises four complementary portions,

the four complementary portions are at positions respectively corresponding to four vertices of the dummy main body portion, so that an outer contour of the first main dummy electrode is rectangular.

2. The touch structure according to claim 1 , wherein

the second main body portion of at least one of the plurality of second touch electrode portions comprises a second main effective electrode and a second main dummy electrode,

the second main dummy electrode is inside the second main effective electrode and is insulated from the second main effective electrode.

3. The touch structure according to claim 2 , wherein the first touch electrode and the second touch electrode constitute a touch unit at an intersection of the first touch electrode and the second touch electrode, the touch unit comprises halves, facing to each other, of two first touch electrode portions that are connected at the intersection, halves, facing to each other, of two second touch electrode portions that are connected at the intersection, a first connection portion connecting the two first touch electrode portions and a second connection portion connecting the two second touch electrode portions, and

an effective area of the touch unit accounts for 36%-48% of a total area of the touch unit.

4. The touch structure according to claim 1 ,

wherein each of the plurality of first touch electrode portions comprises a plurality of metal meshes constituted by a plurality of metal wires that are connected with each other; and

a portion of the first finger effective electrode on any side of the first finger dummy electrode comprises at least two first signal channels,

each of the at least two first signal channels is constituted by a plurality of metal wires that are connected in sequence.

5. The touch structure according to claim 4 , wherein

an outer contour of the first finger dummy electrode is an irregular polygon,

a portion of the first finger effective electrode, between each edge of the first finger dummy electrode and an edge of the first finger portion where the first finger dummy electrode is located, comprises at least two first signal channels.

6. The touch structure according to claim 1 , wherein the second touch electrode comprises a plurality of second touch electrode portions connected in series, each of the plurality of second touch electrode portions comprises a second main body portion and a plurality of second finger portions, and the plurality of second finger portions protrude from the second main body portion.

7. The touch structure according to claim 6 , wherein at least one second finger portion of at least one of the plurality of second touch electrode portions comprises a second finger effective electrode and a second finger dummy electrode, the second finger dummy electrode is insulated from the second effective electrode, and the second finger effective electrode is connected with the second main body portion.

8. The touch structure according to claim 6 , wherein the first finger portions are in a same layer as the second finger portions, and insulated from and interdigitated with the second finger portions.

9. The touch structure according to claim 1 , wherein the first main effective electrode comprises at least one strip-shaped electrode, and the first main dummy electrode comprises a plurality of dummy sub-electrodes, and the at least one strip-shaped electrode separates the plurality of dummy sub-electrodes from each other.

10. The touch structure according to claim 9 , wherein each of the at least one strip-shaped electrode comprises at least two second signal channels, and each of the at least two second signal channels is constituted by a plurality of metal wires that are connected in sequence.

11. The touch structure according to claim 9 , wherein one of the plurality of dummy sub-electrodes is connected with the first finger dummy electrode.

12. A touch structure comprising a first touch electrode and a second touch electrode,

wherein the first touch electrode extends along a first direction, the second touch electrode extends along a second direction, and the first direction intersects with the second direction;

the first touch electrode comprises a plurality of first touch electrode portions, each of the first touch electrode portions comprises a first main body portion and a plurality of first finger portions, and the plurality of first finger portions protrude from the first main body portion;

the first main body portion comprises a first main effective electrode and a first main dummy electrode which are insulated from each other;

the first main dummy electrode of at least one of the plurality of first touch electrode portions comprises a dummy main body portion and a plurality of dummy finger portions, the dummy main body portion is a rectangle and the plurality of dummy finger portions protrude from four sides of the rectangle;

the first main dummy electrode further comprises four complementary portions that are at positions respectively corresponding to four vertices of the dummy main body portion, so that an outer contour of the first main dummy electrode is in a shape of rectangle.

13. The touch structure according to claim 12 , wherein

each of the complementary portions and the dummy finger portion adjacent to the each of the complementary portions are provided side by side along a third direction, and maximum sizes of the complementary portions along a fourth direction are same, and the third direction is different from the fourth direction; and

each of the four complementary portions is spaced apart from or connected with the dummy main body portion.

14. A touch display panel, comprising:

a base substrate,

a display structure, and

the touch structure according to claim 12 ,

wherein the display structure and the touch structure are sequentially stacked on the base substrate.