Touch control substrate, touch display, and electronic device

Patent metadata

Field	Value
Publication number	US-2025021185-A1
Application number	US-202418901901-A
Country	US
Kind code	A1
Filing date	Sep 30, 2024
Priority date	Apr 7, 2022
Publication date	Jan 16, 2025
Grant date	—

Abstract

A touch control substrate or assembly, a touch display, and an electronic device are disclosed. The touch control assembly includes a substrate and a touch control layer, and the touch control layer is disposed on a surface of the substrate. The touch control layer includes a plurality of touch control units that are arranged in an array, and each touch control unit includes two first electrode parts and two second electrode parts. The two first electrode parts are electrically connected, and the two second electrode parts are also electrically connected. The first electrode part extends in a first direction, the second electrode part extends in a second direction, and the first direction intersects with the second direction. The first electrode part includes a first structure part and a second structure part that are connected, and a length a of the second structure part in the first direction. Other embodiments are disclosed.

First claim

1 . A touch control assembly, comprising:
a substrate; and a touch control layer disposed on a surface of the substrate comprising a plurality of touch control units that are arranged in an array, wherein each touch control unit of the plurality of touch control units comprises: two first electrode parts that are electrically connected to each other and two second electrode parts that are electrically connected to each other, each of the first electrode parts extending in a first direction and each of the second electrode parts extending in a second direction, the first direction intersecting with the second direction; and each of the first electrode parts comprises a first structure part and a second structure part connected to the first structure part, wherein:
the second structure part has a length a in the first direction,
the first structure part has a maximum length Lmax in a third direction and a minimum length Lmin in the third direction, the lengths a, Lmax, and Lmin meeting: a≤Lmax≤5Lmin, and
the third direction is perpendicular to the first direction.

2 . The touch control assembly according to claim 1 , wherein at least one of the first electrode parts further comprises at least one first branch part electrically connected to its first structure part.

3 . The touch control assembly according to claim 2 , wherein the first branch part is located in an edge area of its respective touch control unit.

4 . The touch control assembly according to claim 2 , further comprising at least one second branch part electrically connected to one of the at least one first branch part.

5 . The touch control assembly according to claim 4 , wherein the at least one of the first structure part, at least one of the second structure part, the at least one first branch part, and the at least one second branch part comprise an integrated structure.

6 . The touch control assembly according to claim 4 , wherein the at least one second branch part is located in an edge area of its respective touch control unit.

7 . The touch control assembly according to claim 1 , wherein at least one of the first electrode parts is of a symmetric structure, and a symmetry axis of the at least one of the first electrode parts extends in the first direction.

8 . The touch control assembly according to claim 1 , wherein the two first electrode parts in the touch control unit are connected through a bridge.

9 . The touch control assembly according to claim 1 , wherein at least one of the plurality of touch control units further comprises an electrically conductive additional part electrically connected to each of the two first electrode parts through bridges.

10 . The touch control assembly according to claim 1 , wherein an edge of at least one of the first structure parts that extends in the first direction is a straight line, a serrated line, a wavy line, or a line having a groove.

11 . The touch control assembly according to claim 1 , wherein the maximum length Lmax and the minimum length Lmin meet: Lmax≤3Lmin.

12 . The touch control assembly according to claim 1 , wherein each of the second electrode parts comprises a third structure part and a fourth structure part connected to the third structure part, wherein:
the fourth structure part has a length a′ in the second direction, the third structure part has a maximum length Lmax′ in a fourth direction and a minimum length Lmin′ in the fourth direction, the lengths a′, Lmax′, and Lmin′ meeting: a′≤Lmax′≤5Lmin′, and the fourth direction is perpendicular to the second direction.

13 . The touch control assembly according to claim 12 , wherein at least one of the second electrode parts further comprises at least one third branch part electrically connected to its third structure part.

14 . The touch control assembly according to claim 12 , wherein at least one of the second electrode parts is of a symmetric structure, and a symmetry axis of the at least one of the second electrode parts extends in the second direction.

15 . The touch control assembly according to claim 12 , wherein an edge of at least one of the third structure parts that extends in the second direction is a straight line, a serrated line, a wavy line, or a line having a groove.

16 . The touch control assembly according to claim 12 , wherein the maximum length Lmax′ and the minimum length Lmin′ meet: Lmax′≤3Lmin′.

17 . A touch display, comprising:
a light emitting layer; an encapsulation layer; and a touch control comprising: a substrate; and a touch control layer disposed on a surface of the substrate comprising a plurality of touch control units that are arranged in an array, wherein each touch control unit of the plurality of touch control units comprises:
two first electrode parts that are electrically connected to each other and two second electrode parts that are electrically connected to each other, each of the first electrode parts extending in a first direction and each of the second electrode parts extending in a second direction, the first direction intersecting with the second direction; and
each of the first electrode parts comprises a first structure part and a second structure part connected to the first structure part, wherein:
the second structure part has a length a in the first direction,
the first structure part has a maximum length Lmax in a third direction and a minimum length Lmin in the third direction, the lengths a, Lmax, and Lmin meeting: a≤Lmax≤5Lmin, and
the third direction is perpendicular to the first direction, and

wherein the encapsulation layer is disposed upon the light emitting layer, and the touch control is disposed upon the encapsulation layer.

18 . The touch display according to claim 17 , wherein at least one of the first electrode parts further comprises at least one first branch part electrically connected to its first structure part.

19 . The touch display according to claim 18 , further comprising at least one second branch part electrically connected to one of the at least one first branch part.

20 . An electronic device, comprising:
a circuit board; and a touch display, comprising: a light emitting layer; an encapsulation layer; and a touch control comprising:
a substrate; and
a touch control layer disposed on a surface of the substrate comprising a plurality of touch control units that are arranged in an array,
wherein each touch control unit of the plurality of touch control units comprises:
two first electrode parts that are electrically connected to each other and two second electrode parts that are electrically connected to each other, each of the first electrode parts extending in a first direction and each of the second electrode parts extending in a second direction, the first direction intersecting with the second direction; and
each of the first electrode parts comprises a first structure part and a second structure part connected to the first structure part, wherein:
the second structure part has a length a in the first direction,
the first structure part has a maximum length Lmax in a third direction and a minimum length Lmin in the third direction, the lengths a, Lmax, and Lmin meeting: a≤Lmax≤5Lmin, and

the third direction is perpendicular to the first direction, and

wherein the encapsulation layer is disposed upon the light emitting layer, and the touch control is disposed upon the encapsulation layer; and
wherein the circuit board is electrically connected to the touch display.

Assignees

• Huawei Tech Co Ltd

Inventors

• Chen Zesheng
• Zhang Junyong

Classifications

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title