Touch panel and touch display apparatus

Patent metadata

Field	Value
Publication number	US-12314522-B2
Application number	US-202418585315-A
Country	US
Kind code	B2
Filing date	Feb 23, 2024
Priority date	Oct 27, 2020
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A touch panel includes a base substrate having at least two mounting holes, and a touch function layer including first and second touch units. Each first touch unit includes first touch electrodes located in a same layer, and each second touch unit includes second touch electrodes located in a same layer and insulated from the first touch electrodes. The touch function layer is hollowed out at positions corresponding to the at least two mounting holes and has a gap region at a position corresponding to a region between two adjacent mounting holes. In a first touch unit, first touch electrodes located in the gap region serve as a first gap electrode and a second gap electrode. In a second touch unit, second touch electrodes located in the gap region serve as a third gap electrode located between the first and second gap electrodes and a fourth gap electrode.

First claim

What is claimed is:

1. A touch panel having a touch area, the touch panel comprising:
a base substrate; and
a touch function layer disposed on the base substrate, the touch function layer including a plurality of first touch units extending in a first direction and a plurality of second touch units extending in a second direction; each first touch unit including a plurality of first touch electrodes arranged in the first direction and connected in series, each second touch unit including a plurality of second touch electrodes arranged in the second direction and connected in series; the plurality of first touch electrodes and the plurality of second touch electrodes being insulated from each other; the plurality of first touch electrodes are located in a same layer, and the plurality of second touch electrodes are located in a same layer; the first direction intersecting the second direction; wherein:
the base substrate has at least two mounting holes located in the touch area, the touch function layer is hollowed out at positions corresponding to the at least two mounting holes and has a gap region at a position corresponding to a region between two adjacent mounting holes; in a first touch unit passing through the gap region, first touch electrodes located in the gap region serve as a first gap electrode and a second gap electrode that are arranged in the first direction and are electrically connected to each other; in a second touch unit passing through the gap region, second touch electrodes located in the gap region serve as a third gap electrode and a fourth gap electrode that are arranged in the second direction and are electrically connected to each other; the third gap electrode is located between the first gap electrode and the second gap electrode in the first direction; wherein:
shapes of portions, proximate to each other, of contours of the third gap electrode and the first gap electrode are complementary, and shapes of portions, proximate to each other, of contours of the third gap electrode and the second gap electrode are complementary.

2. The touch panel according to claim 1 , wherein a contour of the first gap electrode and/or a contour of the second gap electrode are at least partially different from a contour of a first touch electrode located in a non-gap region;
a contour of the third gap electrode and/or a contour of the fourth gap electrode are at least partially different from a contour of a second touch electrode located in the non-gap region; and
the third gap electrode is embedded in an integrated electrode formed by electrically connecting the first gap electrode and the second gap electrode.

3. The touch panel according to claim 1 , wherein a mutual capacitance value between a whole of the first gap electrode and the second gap electrode and a whole of the third gap electrode and the fourth gap electrode is C1;
a mutual capacitance value between a first touch electrode and a second touch electrode that are located in a non-gap region is C2; and
a ratio of C1 to C2 is in a range of 0.75 to 0.8.

4. The touch panel according to claim 1 , wherein a ratio of a sum of areas of the third gap electrode and the fourth gap electrode to a sum of areas of the first gap electrode and the second gap electrode is in a range of 1.2 to 1.4; or
a ratio of areas of a second touch electrode and a first touch electrode that are in a non-gap region is in a range of 0.9 to 1.

5. The touch panel according to claim 1 , wherein an edge of at least one of the third gap electrode or the fourth gap electrode has at least one branch, the edge is proximate to at least one of the first gap electrode or the second gap electrode, and the at least one branch extends into the at least one of the first gap electrode or the second gap electrode; or
an edge of at least one of the third gap electrode or the fourth gap electrode has at least one branch, the edge is proximate to at least one of the first gap electrode or the second gap electrode, the at least one branch extends into the at least one of the first gap electrode or the second gap electrode, and an edge of the branch is zigzag-shaped.

6. The touch panel according to claim 1 , wherein the contour of the third gap electrode has protrusions in various shapes, and the protrusions in various shapes include at least two types of wavy protrusions, rectangular protrusions, trapezoidal protrusions or triangular protrusions; the third gap electrode includes a first portion, a second portion, and a third portion that are connected as a whole, and the first portion, the second portion and the third portion are arranged in sequence in a direction from the third gap electrode to the fourth gap electrode; and average dimensions of the first portion and the third portion in the first direction are both less than an average dimension of the second portion in the first direction; or
the contour of the third gap electrode has protrusions in various shapes, and the protrusions in various shapes include wavy protrusions and at least one type of rectangular protrusions, trapezoidal protrusions or triangular protrusions; the third gap electrode includes: a first portion, a second portion, and a third portion that are connected as a whole, and the first portion, the second portion and the third portion are arranged in sequence in a direction from the third gap electrode to the fourth gap electrode; and average dimensions of the first portion and the third portion in the first direction are both less than an average dimension of the second portion in the first direction; and the wavy protrusions are on a portion, proximate to the first gap electrode, of a contour of the first portion and a portion, proximate to the second gap electrode, of a contour of the first portion.

7. The touch panel according to claim 1 , wherein each second touch unit further includes a plurality of bridge structures; in the second direction, any two adjacent second touch electrodes are electrically connected through a bridge structure; the third gap electrode is electrically connected to the fourth gap electrode through a bridge structure located in the gap region; in the second touch unit passing through the gap region, a line connecting a center of any bridge structure located in a non-gap region and a center of the bridge structure for connecting the third gap electrode and the fourth gap electrode intersects the second direction.

8. The touch panel according to claim 1 , wherein in a radial direction of each mounting hole, the touch function layer further includes: a light blocking portion, at least one connection line, a first signal shielding portion and an electrode line that extend along a contour of the mounting hole in sequence;
wherein the light blocking portion extends along an edge of the mounting hole to form a closed-loop structure, and the light blocking portion is configured to block light passing through the mounting hole from entering a region around the mounting hole;
the connection line is configured to electrically connect two adjacent first touch electrodes arranged in the first direction, or electrically connect two adjacent second touch electrodes arranged in the second direction;
the electrode line is configured to be electrically connected to an edge, proximate to the mounting hole, of a first touch electrode or a second touch electrode; and
the first signal shielding portion is disposed at least between the connection line and the electrode line that are adjacent.

9. A touch display apparatus, comprising the touch panel according to claim 1 .

10. A touch panel having a touch area, the touch panel comprising:
a base substrate; and
a touch function layer disposed on the base substrat

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Wang Lingran
• Yan Jun
• Gao Wenhui
• Song Gukhwan

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044 Primary

  by capacitive means · 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