Touch panel and electronic device

Patent metadata

Field	Value
Publication number	US-12236039-B2
Application number	US-202318329026-A
Country	US
Kind code	B2
Filing date	Jun 5, 2023
Priority date	Sep 22, 2022
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

Abstract

A touch panel and an electronic device are provided in the disclosure. The touch panel includes multiple touch units spaced apart from each other. Each touch unit includes a driving electrode and detection electrodes. The driving electrode includes a first driving branch and multiple second driving branches spaced apart from each other. The multiple second driving branches are connected with the first driving branch. Two adjacent second driving branches and the first driving branch define at least one receiving space. Each receiving space receives at least one of the detection electrodes. Each detection electrode is electrically connected with a touch-detection signal line, and different detection electrodes are electrically connected with different touch-detection signal lines, respectively.

First claim

What is claimed is:

1. A touch panel, comprising a plurality of touch units spaced apart from each other, each of the plurality of the touch units comprising:
a driving electrode comprising a first driving branch and a plurality of second driving branches spaced apart from each other, wherein the plurality of second driving branches are connected with the first driving branch, and each two adjacent second driving branches in the plurality of second driving branches and the first driving branch define at least one receiving space; and
detection electrodes, wherein each receiving space receives at least one of the detection electrodes, each of the detection electrodes is electrically connected with a touch-detection signal line, and different detection electrodes are electrically connected with different touch-detection signal lines, respectively,
wherein
each two adjacent second driving branches in the plurality of second driving branches and the first driving branch define two receiving spaces,
the two receiving spaces are arranged at two opposite sides of the first driving branch, respectively,
the two receiving spaces arranged at the two opposite sides of the first driving branch are different in size, and
the detection electrodes received in the two receiving spaces arranged at the two opposite sides of the first driving branch are different in size.

2. The touch panel of claim 1 , wherein each of the plurality of second driving branches comprises a first driving sub-branch and a second driving sub-branch, wherein
the first driving sub-branch and the second driving sub-branch are arranged at the two opposite sides of the first driving branch, respectively, first driving sub-branches of different second driving branches are arranged at one side of the first driving branch, and second driving sub-branches of different second driving branches are arranged at the other side of the first driving branch, each two adjacent first driving sub-branches and the first driving branch define a receiving space, and each two adjacent second driving sub-branches and the first driving branch define a receiving space.

3. The touch panel of claim 1 , wherein the first driving branch is arranged at a middle region of each of the plurality of second driving branches.

4. The touch panel of claim 1 , wherein
the driving electrode has a plurality of first protrusions at an edge facing the detection electrode, wherein the plurality of first protrusions are spaced apart from each other; and
each of the detection electrodes has a plurality of second protrusions at an edge facing the driving electrode, wherein the second protrusions are spaced apart from each other; wherein
each of at least part of the second protrusions of the detection electrode in the smaller of the two receiving spaces extends into a gap between two adjacent first protrusions of the driving electrode by a first depth, and each of at least part of the second protrusions of the detection electrode in the larger of the two receiving spaces extends into a gap between two adjacent first protrusions of the driving electrode by a second depth, where the first depth is greater than the second depth.

5. The touch panel of claim 1 , wherein
the driving electrode has a plurality of first protrusions at an edge facing the detection electrodes, wherein the plurality of first protrusions are spaced apart from each other; and
each of the detection electrodes has a plurality of second protrusions at an edge facing the driving electrode, wherein the second protrusions are spaced apart from each other; wherein
at least part of the second protrusions satisfies the following: each of the at least part of the second protrusions is arranged between two adjacent first protrusions and is spaced apart from the first protrusions, and at least part of the first protrusions satisfies the following: each of the at least part of the first protrusions is arranged between two adjacent second protrusions and is spaced apart from the second protrusions.

6. The touch panel of claim 1 , wherein each touch-detection signal line comprises a body portion and a connection portion that are connected in a bent manner, wherein the connection portion is electrically connected with the detection electrode, and the body portion is arranged at a side of the detection electrode away from the first driving branch.

7. The touch panel of claim 6 , wherein each of the plurality of touch units comprises an electrode layer, an insulation layer, a signal-line layer, and a protection layer arranged in sequence, wherein
the driving electrode and the detection electrodes are arranged at the electrode layer, and the body portion of the touch-detection signal line is arranged at the signal-line layer, and the connection portion of the touch-detection signal line is partially arranged at the signal-line layer, partially passes through the insulation layer, and is connected with the detection electrode.

8. The touch panel of claim 1 , wherein the driving electrode and the detection electrodes are arranged at a same layer, and the touch-detection signal line is arranged at a layer different from a layer where the driving electrode and the detection electrodes are arranged.

9. The touch panel of claim 1 , wherein at least one of the driving electrode or the detection electrode defines a hollow portion for arrangement of a camera of an electronic device comprising the touch panel.

10. An electronic device, comprising:
a display panel; and
a touch panel carried on the display panel and comprising a plurality of touch units spaced apart from each other, and each of the plurality of the touch units comprising:
a driving electrode comprising a first driving branch and a plurality of second driving branches spaced apart from each other, wherein the plurality of second driving branches are connected with the first driving branch, and each two adjacent second driving branches in the plurality of second driving branches and the first driving branch define at least one receiving space; and
detection electrodes, wherein each receiving space receives at least one of the detection electrodes, each of the detection electrodes is electrically connected with a touch-detection signal line, and different detection electrodes are electrically connected with different touch-detection signal lines, respectively,

wherein
each two adjacent second driving branches in the plurality of second driving branches and the first driving branch define two receiving spaces,
the two receiving spaces are arranged at two opposite sides of the first driving branch, respectively,
the two receiving spaces arranged at the two opposite sides of the first driving branch are different in size, and
the detection electrodes received in the two receiving spaces arranged at the two opposite sides of the first driving branch are different in size.

11. The electronic device of claim 10 , wherein
the display panel is a Liquid Crystal Display (LCD) panel, and the LCD panel comprises a Thin Film Transistor (TFT) substrate, wherein the TFT substrate comprises a carrier substrate, a TFT array layer, and a common electrode layer, wherein the TFT array layer and the common electrode layer are carried on the carrier substrate, and the common electrode layer is farther away from the carrier substrate than the TFT array layer, and the plurality of touch units are formed at the common electrode layer; or
the display panel is an Organic Light-Emitting Diode (OLED) display panel, wherein the OLED display panel comprises a light-emitting layer and an encapsulation layer, wherein the encapsulation layer is configured to encapsulate the light-emitting lay

Assignees

• Hkc Corp Ltd

Inventors

• Li Wang
• Yuan Haijiang

Classifications

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/0446

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

• G06F3/0448

  Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title