Touch structure, test method thereof, touch panel and display apparatus
The present disclosure provides a touch structure, a test method thereof, a touch panel and a display apparatus. In the touch structure, by taking touch driving electrodes as an example, a plurality of third leads which are insulated from each other and are in one-to-one correspondence with various touch driving electrodes are additionally provided, wherein each of the third leads has one terminal electrically connected to a corresponding touch driving electrode and the other terminal serving as a test point for testing whether there is an open circuit on the corresponding touch driving electrode and the corresponding first lead. In this way, two probes may be placed at a test point in a third lead and a first wiring terminal in a binding area respectively when an open circuit test is conducted on each of the touch driving electrodes and a corresponding first lead.
1. A touch structure, comprising:
a plurality of touch driving electrodes;
a plurality of touch sensing electrodes provided to intersect with the plurality of touch driving electrodes in an insulating manner;
a plurality of first leads insulated from each other and electrically connected to the touch driving electrodes in one-to-one correspondence;
a plurality of second leads insulated from each other and electrically connected to the touch sensing electrodes in one-to-one correspondence;
a plurality of third leads insulated from each other and in one-to-one correspondence with the touch driving electrodes, wherein each third lead has one terminal electrically connected to a corresponding touch driving electrode and the other terminal serving as a test point for the touch driving electrode for testing whether there is an open circuit on the corresponding touch driving electrode and a corresponding first lead; and/or
a plurality of fourth leads insulated from each other and in one-to-one correspondence with the touch sensing electrodes, wherein each fourth lead has one terminal electrically connected to a corresponding touch sensing electrode and the other terminal serving as a test point for the touch sensing electrode for testing whether there is an open circuit on the corresponding touch sensing electrode and a corresponding second lead,
wherein:
each of the first leads comprises a first sub-lead and a second sub-lead, wherein each of the touch driving electrodes has a first terminal electrically connected to a first terminal of a first sub-lead of a corresponding first lead, and a second terminal electrically connected to a first terminal of a second sub-lead of the corresponding first lead, a second terminal of the first sub-lead is electrically connected to a second terminal of the second sub-lead, and both the second terminal of the first sub-lead and the second terminal of the second sub-lead are electrically connected to a first wiring terminal in a binding area, and
a resistance of a part of the touch driving electrode between a position where the touch driving electrode is electrically connected to the corresponding third lead and a position where the touch driving electrode is electrically connected to the first sub-lead is R 1 , a resistance of a part of the touch driving electrode between a position where the touch driving electrode is electrically connected to the corresponding third lead and a position where the touch driving electrode is electrically connected to the second sub-lead is R 2 , a resistance of the first sub-lead is R 3 , a resistance of the second sub-lead is R 4 , and R 1 , R 2 , R 3 and R 4 satisfy
2
≤
R
1
+
R
3
R
2
+
R
4
≤
9
or
2
≤
R
2
+
R
4
R
1
+
R
3
≤
9
;
and or
each of the second leads comprises a third sub-lead and a fourth sub-lead, wherein each of the touch sensing electrodes has a first terminal electrically connected to a first terminal of a third sub-lead of a corresponding second lead, and a second terminal electrically connected to a first terminal of a fourth sub-lead of the corresponding second lead, a second terminal of the third sub-lead is electrically connected to a second terminal of the fourth sub-lead, and both the second terminal of the third sub-lead and the second terminal of the fourth sub-lead are electrically connected to a second wiring terminal in the binding area, and
a resistance of a part of the touch sensing electrode between a position where the touch sensing electrode is electrically connected to the corresponding fourth lead and a position where the touch sensing electrode is electrically connected to the third sub-lead is R 5 , a resistance of a part of the touch sensing electrode between a position where the touch sensing electrode is electrically connected to the corresponding fourth lead and a position where the touch sensing electrode is electrically connected to the fourth sub-lead is R 6 , a resistance of the third sub-lead is R 7 , a resistance of the fourth sub-lead is R 8 , and R 5 , R 6 , R 7 and R 8 satisfy
2
≤
R
5
+
R
7
R
6
+
R
8
≤
9
or
2
≤
R
6
+
R
8
R
5
+
R
7
≤
9.
2. The touch structure according to claim 1 , wherein
the third leads are provided in a same layer as the touch driving electrodes, a third lead corresponding to one of the touch driving electrodes different from two outermost touch driving electrodes is located in a gap between the corresponding touch driving electrode and an adjacent touch driving electrode, and a third lead corresponding to one of the two outermost touch driving electrodes is located in a gap between the corresponding touch driving electrode and an adjacent touch driving electrode or is located on one side of the corresponding touch driving electrode away from the adjacent touch driving electrode; and
the fourth leads are provided in a same layer as the touch sensing electrodes, a fourth lead corresponding to one of the touch sensing electrodes different from two outermost touch sensing electrodes is located in a gap between the corresponding touch sensing electrode and an adjacent touch sensing electrode, and a fourth lead corresponding to one of the two outermost touch sensing electrodes is located in a gap between the corresponding touch sensing electrode and an adjacent touch sensing electrode or is located on one side of the corresponding touch sensing electrode away from the adjacent touch sensing electrode.
3. The touch structure according to claim 1 , wherein
R 1 , R 2 , R 3 and R 4 satisfy
R
1
+
R
3
R
2
+
R
4
=
2
or
R
2
+
R
4
R
1
+
R
3
=
2
;
and
R 5 , R 6 , R 7 and R 8 satisfy
R
5
+
R
7
R
6
+
R
8
=
2
or
R
6
+
R
8
R
5
+
R
7
=
2.
4. The touch structure according to claim 1 , wherein
each first lead has one terminal electrically connected to a corresponding touch driving electrode, and the other terminal electrically connected to a first wiring terminal in a binding area; and/or
each second lead has one terminal electrically connected to a corresponding touch sensing electrode, and the other terminal electrically connected to a second wiring terminal in the binding area.
5. The touch structure according to claim 4 , wherein
each third lead is electrically connected to a terminal of a corresponding touch driving electrode which is not connected to the first lead; and
each fourth lead is electrically connected to a terminal of a corresponding touch sensing electrode which is not connected to the second lead.
6. The touch structure according to claim 1 , further comprising an insulating layer located over the touch driving electrodes and the touch sensing electrodes, wherein
the insulating layer has via holes penetrating therethrough at positions corresponding to test points for the touch driving electrodes and/or test points for the touch sensing electrodes.
7. A touch panel, comprising a touch structure, the touch structure comprising:
a plurality of touch driving electrodes;
a plurality of touch sensing electrodes provided to intersect with the plurality of touch driving electrodes in an insulating manner;
a plurality of first leads insulated from each other and electrically connected to the touch driving electrodes in one-to-one correspondence;
a plurality of second leads insulated from each other and in one-to-one correspondence with the touch driving electrodes, wherein each third lead has one terminal electrically connected to a corresponding touch driving electrode and the other terminal serving as a test point for the touch driving electrode for testing whether there is an open circuit on the corresponding touch driving electrode and a corresponding first lead; and/or
a plurality of fourth leads insulated from each other and in one-to-one correspondence with the touch sensing electrodes, wherein each fourth lead has one terminal electrically connected to a corresponding touch sensing electrode and the other terminal serving as a test point for the touch sensing electrode for testing whether there is an open circuit on the corresponding touch sensing electrode and a corresponding second lead,
wherein
each first lead comprises a first sub-lead and a second sub-lead, wherein each touch driving electrode has one terminal electrically connected to one terminal of a first sub-lead of a corresponding first lead, and the other terminal electrically connected to one terminal of a second sub-lead of the corresponding first lead, the other terminal of the first sub-lead is electrically connected to the other terminal of the second sub-lead, and both the other terminal of the first sub-lead and the other terminal of the second sub-lead are electrically connected to a first wiring terminal in a binding area,
a resistance of a part of the touch driving electrode between a position where the touch driving electrode is electrically connected to the corresponding third lead and a position where the touch driving electrode is electrically connected to the first sub-lead is R 1 , a resistance of a part of the touch driving electrode between a position where the touch driving electrode is electrically connected to the corresponding third lead and a position where the touch driving electrode is electrically connected to the second sub-lead is R 2 , a resistance of the first sub-lead is R 3 , a resistance of the second sub-lead is R 4 and R 1 , R 2 , R 3 and R 4 satisfy
2
≤
R
1
+
R
3
R
2
+
R
4
≤
9
or
2
≤
R
2
+
R
4
R
1
+
R
3
≤
9
;
and/or
each second lead comprises a third sub-lead and a fourth sub-lead, wherein each touch sensing electrode has one terminal electrically connected to one terminal of a third sub-lead of a corresponding second lead, and the other terminal electrically connected to one terminal of a fourth sub-lead of the corresponding second lead, the other terminal of the third sub-lead is electrically connected to the other terminal of the fourth sub-lead, and both the other terminal of the third sub-lead and the other terminal of the fourth sub-lead are electrically connected to a second wiring terminal in the binding area,
a resistance of a part of the touch sensing electrode between a position where the touch sensing electrode is electrically connected to the corresponding fourth lead and a position where the touch sensing electrode is electrically connected to the third sub-lead is R 5 , a resistance of a part of the touch sensing electrode between a position where the touch sensing electrode is electrically connected to the corresponding fourth lead and a position where the touch sensing electrode is electrically connected to the fourth sub-lead is, a resistance of the third sub-lead is, a resistance of the fourth sub-lead is R 7 and R 5 , R 6 , R 7 , and R 8 satisfy
2
≤
R
5
+
R
7
R
6
+
R
8
≤
9
or
2
≤
R
6
+
R
8
R
5
+
R
7
≤
9.
8. A display apparatus, comprising a touch panel that includes a touch structure, the touch structure comprising:
a plurality of touch driving electrodes;
a plurality of touch sensing electrodes provided to intersect with the plurality of touch driving electrodes in an insulating manner;
a plurality of first leads insulated from each other and electrically connected to the touch driving electrodes in one-to-one correspondence;
a plurality of second leads insulated from each other and electrically connected to the touch sensing electrodes in one-to-one correspondence;
a plurality of third leads insulated from each other and in one-to-one correspondence with the touch driving electrodes, wherein each third lead has one terminal electrically connected to a corresponding touch driving electrode and the other terminal serving as a test point for the touch driving electrode for testing whether there is an open circuit on the corresponding touch driving electrode and a corresponding first lead; and/or
a plurality of fourth leads insulated from each other and in one-to-one correspondence with the touch sensing electrodes, wherein each fourth lead has one terminal electrically connected to a corresponding touch sensing electrode and the other terminal serving as a test point for the touch sensing electrode for testing whether there is an open circuit on the corresponding touch sensing electrode and a corresponding second lead,
wherein
each first lead comprises a first sub-lead and a second sub-lead, wherein each touch driving electrode has one terminal electrically connected to one terminal of a first sub-lead of a corresponding first lead, and the other terminal electrically connected to one terminal of a second sub-lead of the corresponding first lead, the other terminal of the first sub-lead is electrically connected to the other terminal of the second sub-lead, and both the other terminal of the first sub-lead and the other terminal of the second sub-lead are electrically connected to a first wiring terminal in a binding area,
a resistance of a part of the touch driving electrode between a position where the touch driving electrode is electrically connected to the corresponding third lead and a position where the touch driving electrode is electrically connected to the first sub-lead is R 1 , a resistance of a part of the touch driving electrode between a position where the touch driving electrode is electrically connected to the corresponding third lead and a position where the touch driving electrode is electrically connected to the second sub-lead is R 2 , a resistance of the first sub-lead is R 3 , a resistance of the second sub-lead is R 4 , and R 1 , R 2 , R 3 and R 4 satisfy
2
≤
R
1
+
R
3
R
2
+
R
4
≤
9
or
2
≤
R
2
+
R
4
R
1
+
R
3
≤
9
;
and/or
each second lead comprises a third sub-lead and a fourth sub-lead, wherein each touch sensing electrode has one terminal electrically connected to one terminal of a third sub-lead of a corresponding second lead, and the other terminal electrically connected to one terminal of a fourth sub-lead of the corresponding second lead, the other terminal of the third sub-lead is electrically connected to the other terminal of the fourth sub-lead, and both the other terminal of the third sub-lead and the other terminal of the fourth sub-lead are electrically connected to a second wiring terminal in the binding area,
a resistance of a part of the touch sensing electrode between a position where the touch sensing electrode is electrically connected to the corresponding fourth lead and a position where the touch sensing electrode is electrically connected to the third sub-lead is R 5 , a resistance of a part of the touch sensing electrode between a position where the touch sensing electrode is electrically connected to the corresponding fourth lead and a position where the touch sensing electrode is electrically connected to the fourth sub-lead is R 6 , a resistance of the third sub-lead is R 7 , a resistance of the fourth sub-lead is R 8 , and R 5 , R 6 , R 7 and R 8 satisfy
2
≤
R
5
+
R
7
R
6
+
R
8
≤
9
or
2
≤
R
6
+
R
8
R
5
+
R
7
≤
9.
9. A test method for the touch structure according to claim 1 , comprising:
measuring, for each touch driving electrode, a resistance between a test point for the touch driving electrode and a first wiring terminal to determine whether there is an open circuit on the touch driving electrode and a corresponding first lead; and
measuring, for each touch sensing electrode, a resistance between a test point for the touch sensing electrode and a second wiring terminal to determine whether there is an open circuit on the touch sensing electrode and a corresponding second lead.
10. The test method according to claim 9 , wherein determining whether there is an open circuit on the touch sensing electrode and a corresponding first lead comprises:
when the measured resistance is R 2 +R 4 +R 9 , determining that there is an open circuit on a part of the touch driving electrode between a position where the touch driving electrode is electrically connected to the corresponding third lead and a position where the touch driving electrode is electrically connected to the first sub-lead and/or on the first sub-lead, wherein R 9 is a resistance of the third lead;
when the measured resistance is R 1 +R 3 +R 9 , determining that there is an open circuit on a part of the touch driving electrode between a position where the touch driving electrode is electrically connected to the corresponding third lead and a position where the touch driving electrode is electrically connected to the second sub-lead and/or on the second sub-lead, wherein R 9 is the resistance of the third lead;
when the measured resistance is abnormal, determining that there is an open circuit on the third lead corresponding to the touch driving electrode; and
when the measured resistance is
(
R
1
+
R
3
)
×
(
R
2
+
R
4
)
R
1
+
R
2
+
R
3
+
R
4
+
R
9
,
determining that there is no open circuit on the touch driving electrode and the corresponding first lead, wherein R 9 is the resistance of the third lead.
11. The test method according to claim 9 , wherein determining whether there is an open circuit on the touch sensing electrode and a corresponding second lead comprises:
when the measured resistance is R 6 +R 8 +R 10 , determining that there is an open circuit on a part of the touch sensing electrode between a position where the touch sensing electrode is electrically connected to the corresponding fourth lead and a position where the touch sensing electrode is electrically connected to the third sub-lead and/or on the third sub-lead, wherein R 10 is a resistance of the fourth lead;
when the measured resistance is R 5 +R 7 +R 10 , determining that there is an open circuit on a part of the touch sensing electrode between a position where the touch sensing electrode is electrically connected to the corresponding fourth lead and a position where the touch sensing electrode is electrically connected to the fourth sub-lead and/or on the fourth sub-lead, wherein R 10 is the resistance of the fourth lead;
when the measured resistance is abnormal, determining that there is an open circuit on the fourth lead corresponding to the touch sensing electrode; and
when the measured resistance is
(
R
5
+
R
7
)
×
(
R
6
+
R
8
)
R
5
+
R
6
+
R
7
+
R
8
+
R
10
,
determining that there is no open circuit on the touch sensing electrode and the corresponding second lead, wherein R 10 is the resistance of the fourth lead.
12. The test method according to claim 9 , wherein determining whether there is an open circuit on the touch driving electrode and the corresponding first lead comprises:
determining whether the measured resistance is abnormal;
if the measured resistance is abnormal, determining that there is an open circuit on the touch driving electrode and/or the corresponding first lead and/or the corresponding third lead; and
if the measured resistance is not abnormal, determining that there is no open circuit on the touch driving electrode and the corresponding first lead.
13. The test method according to claim 9 , wherein determining whether there is an open circuit on the touch sensing electrode and the corresponding second lead comprises:
determining whether the measured resistance is abnormal;
if the measured resistance is abnormal, determining that there is an open circuit on the touch sensing electrode and/or the corresponding second lead and/or the corresponding fourth lead; and
if the measured resistance is not abnormal, determining that there is no open circuit on the touch sensing electrode and the corresponding second lead.
14. The touch structure according to claim 3 , further comprising an insulating layer located over the touch driving electrodes and the touch sensing electrodes, wherein
the insulating layer has via holes penetrating therethrough at positions corresponding to test points for the touch driving electrodes and/or test points for the touch sensing electrodes.
15. The touch panel according to claim 7 , wherein
R 1 , R 2 , R 3 and R 4 satisfy
R
1
+
R
3
R
2
+
R
4
=
2
or
R
2
+
R
4
R
1
+
R
3
=
2
;
and
R 5 , R 6 , R 7 and R 8 satisfy
R
5
+
R
7
R
6
+
R
8
=
2
or
R
6
+
R
8
R
5
+
R
7
=
2.
16. The touch panel according to claim 7 , wherein the touch structure further comprises an insulating layer located over the touch driving electrodes and the touch sensing electrodes, wherein
the insulating layer has via holes penetrating therethrough at positions corresponding to test points for the touch driving electrodes and/or test points for the touch sensing electrodes.
17. The display apparatus according to claim 8 , wherein
R 1 , R 2 , R 3 and R 4 satisfy
R
1
+
R
3
R
2
+
R
4
=
2
or
R
2
+
R
4
R
1
+
R
3
=
2
;
and
R 5 , R 6 , R 7 and R 8 satisfy
R
5
+
R
7
R
6
+
R
8
=
2
or
R
6
+
R
8
R
5
+
R
7
=
2.
18. The display apparatus according to claim 8 , wherein the touch structure further comprises an insulating layer located over the touch driving electrodes and the touch sensing electrodes, wherein
the insulating layer has via holes penetrating therethrough at positions corresponding to test points for the touch driving electrodes and/or test points for the touch sensing electrodes.
19. A test method for the touch structure according to claim 3 , comprising:
measuring, for each touch driving electrode, a resistance between a test point for the touch driving electrode and a first wiring terminal to determine whether there is an open circuit on the touch driving electrode and a corresponding first lead; and
measuring, for each touch sensing electrode, a resistance between a test point for the touch sensing electrode and a second wiring terminal to determine whether there is an open circuit on the touch sensing electrode and a corresponding second lead.
20. A test method for the touch structure according to claim 6 , comprising:
measuring, for each touch driving electrode, a resistance between a test point for the touch driving electrode and a first wiring terminal to determine whether there is an open circuit on the touch driving electrode and a corresponding first lead; and
measuring, for each touch sensing electrode, a resistance between a test point for the touch sensing electrode and a second wiring terminal to determine whether there is an open circuit on the touch sensing electrode and a corresponding second lead.