CN111857445B - Touch layer structure and display panel - Google Patents
Touch layer structure and display panel Download PDFInfo
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- CN111857445B CN111857445B CN202010641760.6A CN202010641760A CN111857445B CN 111857445 B CN111857445 B CN 111857445B CN 202010641760 A CN202010641760 A CN 202010641760A CN 111857445 B CN111857445 B CN 111857445B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- 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
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- Position Input By Displaying (AREA)
Abstract
The invention provides a touch layer structure and a display panel. The display panel comprises a touch layer structure; the touch layer structure is provided with a camera area under the screen, comprises a plurality of rows of first electrodes and a plurality of rows of second electrodes, and is connected with the electrodes in a bridge-crossing structure through mutual insulation. The first electrode comprises a plurality of first sub-electrode grids and a plurality of first sub-connecting lines, and/or the second electrode comprises a plurality of second sub-electrode grids and a plurality of second sub-connecting lines. According to the invention, the sub-connecting lines are added at the junction of the first electrode and the second electrode to enhance the fringe field capacitance when the metal grid occupation ratio is reduced, so that the touch sensitivity at the opening area of the front camera is effectively improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a touch layer structure and a display panel.
Background
With the rapid development of smart phones towards full-screen, the screen occupation ratio requirement is higher and higher, and currently, a design scheme such as Liu Haibing (Notch) of iPhone X appears, a space is reserved for a front-facing camera only on the forehead of the mobile phone, and the rest places are display touch areas.
To further increase screen ratio without compromising display and packaging integrity; therefore, the design of Liu Haibing or the design of an opening in the active area of the display screen is not allowed; therefore, people think that the camera is arranged below the screen, touch control can still be normally displayed above the camera, and meanwhile photographing can be carried out. When the touch sensor is arranged on the opening position of the camera position right below, the opening position has high transmittance, and the basic touch function is required to be reserved in the area, so that the Metal grid in the opening area needs to be designed differently, for example, the Metal grid of the touch layer in the opening area is removed, or the Metal grid occupation ratio of the opening area is reduced.
As shown in fig. 1, if the metal mesh 91 of the touch layer in the opening region 90 is completely removed, although the light blocking in the opening region can be maximally reduced, thereby improving the transmittance thereof, the metal mesh is completely removed, which may cause the touch performance in the region to be deteriorated.
As shown in fig. 2, if the metal mesh 91 of the touch layer in the opening region 90 is reduced in area, the original metal mesh 91 is divided into a plurality of sub-metal meshes 92 arranged at intervals in fig. 2 and electrically connected to reduce the area, which results in a significant difference in capacitance value in the region compared with other regions, and thus the touch accuracy in the region is reduced. Because the touch screen detects the specific position touched by the finger by detecting the capacitance change at the position touched by the finger, when the capacitance change caused by the touch is small, the touch screen may not accurately detect whether there is a touch input, so that the touch accuracy of the area is reduced.
Disclosure of Invention
The invention aims to provide a touch layer structure and a display panel, which can effectively solve the problems that the touch performance of a front camera opening area fails due to the fact that a metal grid of a touch layer of the area is cut off, and the touch cannot be accurately detected due to the fact that the capacitance is reduced due to the fact that the metal grid of the touch layer is reduced.
To achieve the above object, the present invention provides a touch layer structure provided with an under-screen camera area, comprising: the first electrodes in the same row are sequentially and electrically connected through a first bridge wire; the second electrodes in the same row are sequentially and electrically connected through a second bridge wire; the first direction is different from the second direction, and the first bridge spanning line and the second bridge spanning line form an electrode bridge spanning structure which is insulated from each other.
The first electrode comprises a plurality of first sub-electrode grids and a plurality of first sub-connecting lines, and/or the second electrode comprises a plurality of second sub-electrode grids and a plurality of second sub-connecting lines.
Specifically, in the first electrode, the plurality of first sub-electrode grids are arranged in an array along the first direction and the second direction, and a first spacer is arranged between any adjacent first sub-electrode grids; the first sub-electrode grids arranged along the first direction are electrically connected with each other, and the first sub-electrode grids arranged along the second direction are electrically connected with each other; the plurality of first sub-connecting lines are arranged at the junction of the first electrode and the second electrode and used for connecting the first sub-electrode grids positioned at two sides of the first spacing area at the junction so as to increase the fringe field capacitance of the first electrode and the second electrode.
Specifically, in the second electrode, the plurality of second sub-electrode grids are arranged in an array along the first direction and the second direction, and a second spacing region is arranged between any adjacent second sub-electrode grids; the second sub-electrode grids arranged along the first direction are electrically connected with each other, and the second sub-electrode grids arranged along the second direction are electrically connected with each other; the plurality of second sub-connecting lines are arranged at the junction of the first electrode and the second electrode and used for connecting second sub-electrode grids positioned at two sides of the second partition area at the junction so as to increase the fringe field capacitance of the first electrode and the second electrode.
Further, the first sub-electrode grids or the second sub-electrode grids are in a diamond shape.
Further, the first sub-electrode grids are arranged in parallel with the edges of the second sub-electrode grids.
Further, the first sub-connecting line and the second sub-connecting line are arranged in parallel.
Further, the first sub-electrode grids and the second sub-electrode grids have the same area.
Furthermore, the first sub-electrode grids, the second sub-electrode grids, the first sub-connecting lines and the second sub-connecting lines are arranged on the same layer.
Further, the first sub-connection line and the second sub-connection line have the same width.
Further, the first sub-connection line or the second sub-connection line is a straight line.
Further, the first sub-connecting line or the second sub-connecting line is a multi-segment broken line or curve.
In order to achieve the above object, the present invention further provides a display panel, which is provided with a sub-screen camera area, wherein the sub-screen camera area includes the touch layer structure described above.
The invention has the technical effects that the sub-connecting lines are added at the junction of the first electrode and the second electrode to enhance the fringe field capacitance when the metal grid occupation ratio is reduced, so that the touch sensitivity at the opening area of the front camera is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic plan view of a touch layer with a completely removed metal mesh in an opening area;
FIG. 2 is a schematic view of a planar structure of a touch layer with a reduced metal mesh ratio in an opening area;
fig. 3 is a partially enlarged view of a planar structure of the touch layer structure in the camera opening area in embodiment 1 of the present invention;
fig. 4 is a partially enlarged view of a planar structure of the touch layer structure in the camera opening area in embodiment 2 of the present invention;
fig. 5 is a partially enlarged plan view of the camera opening area of the touch layer structure in embodiment 3 of the present invention.
Some of the symbols in the drawings are as follows:
1. a first electrode, 2, a second electrode, 3, an electrode bridge structure,
10. a touch layer structure 11, a first sub-electrode grid 12, a first sub-connecting line,
13. a first spacer area, 20, an under-screen camera area, 21, a second sub-electrode grid,
22. a second sub-connection line, 23, a second spacer region, 31, a first bridge line,
32. a second bridge-crossing line 111, a first grid line 211 and a second grid line.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
As shown in fig. 3, in embodiment 1 of the present invention, a touch layer structure 10 is provided, where the touch layer structure 10 is provided with an off-screen camera area 20, the touch layer structure 10 includes a plurality of first electrodes 1 arranged along a first direction, and the first electrodes 1 in the same column are sequentially electrically connected through a first bridge line 31 to form a first touch line RX; the plurality of second electrodes 2 are arranged along a second direction, and the second electrodes 2 in the same row are electrically connected in sequence through a second bridge-spanning line 32 to form a second touch line TX; the first direction is different from the second direction, preferably, the first direction is longitudinal direction, the second direction is transverse direction, the first bridging line 31 and the second bridging line 32 form an electrode bridging structure 3 which is insulated from each other, and the first electrode 1 and the second electrode 2 are insulated from each other.
Fig. 3 is a partially enlarged plan view of the touch layer structure 10 in the camera opening area in this embodiment. Wherein the first electrode 1 comprises a plurality of first sub-electrode grids 11 and a plurality of first sub-connecting lines 12.
Specifically, in the first electrode 1, the plurality of first sub-electrode grids 11 are arranged in an array along the first direction and the second direction, and a first spacing area 13 is arranged between any adjacent first sub-electrode grids 11, that is, the plurality of first sub-electrode grids 11 are in an island structure; the first sub-electrode grids 11 arranged along the first direction are electrically connected to each other through first grid routing lines 111 along the first direction, and the first sub-electrode grids 11 arranged along the second direction are electrically connected to each other through first grid routing lines 111 along the second direction; the plurality of first sub-connecting lines 12 are disposed at the junction between the first electrode 1 and the second electrode 2, and are used for connecting the first sub-electrode grids 11 located at two sides of the first spacing area 13 at the junction, so as to increase the fringe field capacitance of the first electrode 1 and the second electrode 2.
In the first electrode 1 of this embodiment, the first sub-connection line 12 is added at the boundary between the first electrode 1 and the second electrode 2 to enhance the fringe field capacitance when the metal mesh occupancy is reduced, so that the touch sensitivity at the opening area of the front camera is effectively improved. This is because the mutual capacitance of the in-plane touch sensor based on the single-layer bridging structure disposed on the first sub-electrode grid 11 mainly lies in the fringe field capacitance at the interface between TX and RX, i.e. the fringe field capacitance at the interface between the first electrode 1 and the second electrode 2, and the mutual capacitance generated by the electrodes far away from the interface is usually smaller. Therefore, the touch layer structure 10 of the embodiment can reduce the metal mesh occupation ratio of the center of the camera area 20 under the screen, and can improve the transmittance of the camera area, and simultaneously can increase the edge field mutual capacitance value by properly increasing the arrangement density of the metal meshes at the edge intersections, thereby effectively making up the part of reduced mutual capacitance value of TX/RX caused by the reduction of the metal mesh occupation ratio of the camera area 20 under the screen, and effectively improving the touch sensitivity at the front camera opening area.
In this embodiment, the first sub-electrode grids 11 are diamond-shaped.
In this embodiment, the edges of the first sub-electrode grids 11 and the second electrode 2 are parallel to each other.
In this embodiment, the first sub-electrode grids 11, the second electrodes 2, and the first sub-connecting lines 12 are disposed on the same layer, and may be formed by patterning the same metal layer.
In this embodiment, the first sub-connecting lines 12 are straight lines.
In this embodiment, the first sub-connecting line 12 is a multi-segment broken line or curve.
Example 2
As shown in fig. 4, embodiment 2 includes most of the technical features of the first embodiment, but the second electrode 2 in embodiment 2 includes a plurality of second sub-electrode grids 21 and a plurality of second sub-connection lines 22, instead of the first electrode 1 in embodiment 1 including a plurality of first sub-electrode grids 11 and a plurality of first sub-connection lines 12.
Fig. 4 is a partially enlarged plan view of the touch layer structure 10 in the camera opening area in this embodiment. Specifically, in the second electrode 2, the plurality of second sub-electrode grids 21 are arranged in an array along the first direction and the second direction, and a second spacing region 23 is arranged between any adjacent second sub-electrode grids 21, that is, the plurality of second sub-electrode grids 21 are in an island structure; the second sub-electrode grids 21 arranged along the first direction are electrically connected to each other through the second grid routing 211 along the first direction, and the second sub-electrode grids 21 arranged along the second direction are electrically connected to each other through the second grid routing 211 along the second direction; the plurality of second sub-connection lines 22 are disposed at a junction between the first electrode 1 and the second electrode 2, and are used for connecting the second sub-electrode grids 21 located at two sides of the second isolation region 23 at the junction, so as to increase fringe field capacitance of the first electrode 1 and the second electrode 2.
In this embodiment, the second sub-electrode grids 21 are diamond-shaped.
In this embodiment, the edges of the first electrode 1 and the second sub-connecting line 22 are parallel to each other.
In this embodiment, the first electrode 1, the second sub-electrode grids 21 and the second sub-connecting lines 22 are disposed on the same layer, and may be formed by patterning the same metal layer.
In this embodiment, the second sub-connecting lines 22 are straight lines.
In this embodiment, the second sub-connecting lines 22 are multi-segment type broken lines or curves.
In the second electrode 2 of this embodiment, when the metal mesh occupation ratio is reduced, the second sub-connection line 22 is added at the boundary between the first electrode 1 and the second electrode 2 to enhance the fringe field capacitance, so that the touch sensitivity at the opening area of the front camera is effectively improved. This is because the mutual capacitance of the in-plane touch sensor based on the single-layer bridging structure disposed on the second sub-electrode grid 21 mainly lies in the fringe field capacitance at the interface between TX and RX, i.e., the fringe field capacitance at the interface between the first electrode 1 and the second electrode 2, and the mutual capacitance generated by the electrodes far away from the interface is usually smaller. Therefore, the touch layer structure 10 of the embodiment can reduce the metal mesh occupation ratio of the center of the camera area 20 under the screen, and can improve the transmittance of the camera area, and simultaneously can increase the edge field mutual capacitance value by properly increasing the arrangement density of the metal meshes at the edge intersections, thereby effectively making up the part of reduced mutual capacitance value of TX/RX caused by the reduction of the metal mesh occupation ratio of the camera area 20 under the screen, and effectively improving the touch sensitivity at the front camera opening area.
Example 3
As shown in fig. 5, embodiment 3 includes all the technical features of embodiment 1, and the difference is that the second electrode 2 in embodiment 3 includes a plurality of second sub-electrode grids 21 and a plurality of second sub-connection lines 22, and further includes that the first electrode 1 in embodiment 1 includes a plurality of first sub-electrode grids 11 and a plurality of first sub-connection lines 12.
Fig. 5 is a partially enlarged plan view of the touch layer structure 10 in the camera opening area in this embodiment. In this embodiment, the edges of the first sub-connecting line 12 and the second sub-connecting line 22 are parallel to each other.
In this embodiment, the areas of the first sub-electrode grids 11 and the second sub-electrode grids 21 are the same.
In this embodiment, the first sub-electrode grids 11, the second sub-electrode grids 21, the first sub-connection lines 12 and the second sub-connection lines 22 are disposed on the same layer, and may be formed by patterning the same metal layer.
In this embodiment, the first sub-connecting lines 12 and the second sub-connecting lines 22 have the same width.
In the first electrode 1 and the second electrode 2 of this embodiment, when the metal mesh occupancy is reduced, the first sub-connection line 12 and the second sub-connection line 22 are simultaneously added at the boundary between the first electrode 1 and the second electrode 2 to enhance the fringe field capacitance, so that the touch sensitivity at the opening area of the front camera is effectively improved, and this embodiment has a better fringe field capacitance enhancing effect compared with embodiments 1 and 2. This is because the mutual capacitance of the in-plane touch sensor based on the single-layer bridging structure disposed on the first sub-electrode grid 11 and the second sub-electrode grid 21 mainly lies in the fringe field capacitance at the interface between TX and RX, i.e., the fringe field capacitance at the interface between the first electrode 1 and the second electrode 2, and the mutual capacitance generated by the electrodes far away from the interface is usually small. Therefore, the touch layer structure 10 of the embodiment can reduce the metal mesh occupation ratio of the center of the camera area 20 under the screen, and can improve the transmittance of the camera area, and simultaneously can increase the edge field mutual capacitance value by properly increasing the arrangement density of the metal meshes at the edge intersections, thereby effectively making up the part of reduced mutual capacitance value of TX/RX caused by the reduction of the metal mesh occupation ratio of the camera area 20 under the screen, and effectively improving the touch sensitivity at the front camera opening area.
In order to achieve the above object, the present invention further provides a display panel, which is provided with a sub-screen camera area 20, wherein the sub-screen camera area 20 includes the touch layer structure described above.
The technical effect of the invention is to provide a touch layer structure and a display panel, and the sub-connecting lines are added at the junction of a first electrode and a second electrode to enhance the fringe field capacitance when the metal grid occupation ratio is reduced, so that the touch sensitivity at the opening area of the front camera is effectively improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a touch-control layer structure is equipped with camera area under the screen, its characterized in that includes:
the first electrodes in the same row are sequentially and electrically connected through a first bridge wire; and
multiple rows of second electrodes arranged along a second direction, wherein the second electrodes in the same row are electrically connected in sequence through a second bridge wire; the first direction is different from the second direction, and the first bridge spanning line and the second bridge spanning line form an electrode bridge spanning structure which is insulated from each other;
wherein at least one of the first electrodes in the under-screen camera area comprises:
the first sub-electrode grids are arranged in an array along the first direction and the second direction, and a first spacing area is arranged between any adjacent first sub-electrode grids; the first sub-electrode grids arranged along the first direction are electrically connected with each other, and the first sub-electrode grids arranged along the second direction are electrically connected with each other; and
the first sub-connecting lines are arranged at the junction of the first electrode and the second electrode and used for connecting the first sub-electrode grids positioned at two sides of the first spacing area at the junction so as to increase the fringe field capacitance of the first electrode and the second electrode; and/or
At least one of the second electrodes in the under-screen camera area includes:
the plurality of second sub-electrode grids are arranged in an array along the first direction and the second direction, and a second spacing region is arranged between any two adjacent second sub-electrode grids; the second sub-electrode grids arranged along the first direction are electrically connected with each other, and the second sub-electrode grids arranged along the second direction are electrically connected with each other; and
and the second sub-connecting lines are arranged at the junction of the first electrode and the second electrode and are used for connecting second sub-electrode grids positioned at two sides of the second interval region at the junction so as to increase the fringe field capacitance of the first electrode and the second electrode.
2. The touch layer structure of claim 1, wherein the first sub-electrode grid or the second sub-electrode grid is diamond-shaped.
3. The touch layer structure of claim 1, wherein the first sub-electrode grid and the second sub-electrode grid are disposed parallel to each other at their edges.
4. The touch layer structure of claim 1, wherein the first sub-connecting lines and the second sub-connecting lines are disposed parallel to each other.
5. The touch layer structure of claim 1, wherein the first sub-electrode grid and the second sub-electrode grid have the same area.
6. The touch layer structure of claim 1, wherein the first sub-electrode grids, the second sub-electrode grids, the first sub-connection lines and the second sub-connection lines are disposed on the same layer.
7. The touch layer structure of claim 1, wherein the first sub-connecting lines and the second sub-connecting lines have the same width.
8. The touch layer structure of claim 1, wherein the first sub-connecting line or the second sub-connecting line is a straight line.
9. The touch layer structure of claim 1, wherein the first sub-connecting line or the second sub-connecting line is a multi-segment type broken line or curved line.
10. A display panel provided with an off-screen camera area in which a touch layer structure according to any one of claims 1 to 9 is included.
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| CN202010641760.6A CN111857445B (en) | 2020-07-06 | 2020-07-06 | Touch layer structure and display panel |
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| CN112947784B (en) * | 2021-02-03 | 2023-02-28 | 武汉华星光电半导体显示技术有限公司 | Touch panel and display device |
| KR20220149871A (en) | 2021-04-30 | 2022-11-09 | 삼성디스플레이 주식회사 | Display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110658952A (en) * | 2019-09-29 | 2020-01-07 | 武汉天马微电子有限公司 | Touch display panel and display device |
| CN110750177A (en) * | 2019-10-29 | 2020-02-04 | 武汉天马微电子有限公司 | Touch display panel and touch display device |
| CN110837314A (en) * | 2019-10-11 | 2020-02-25 | 武汉华星光电半导体显示技术有限公司 | Touch sensing device and touch display panel |
| CN110989866A (en) * | 2019-12-03 | 2020-04-10 | 武汉天马微电子有限公司 | Display panel and display device |
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| CN107870492B (en) * | 2017-10-31 | 2020-06-05 | 上海天马微电子有限公司 | Array substrate, display panel and display device thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110658952A (en) * | 2019-09-29 | 2020-01-07 | 武汉天马微电子有限公司 | Touch display panel and display device |
| CN110837314A (en) * | 2019-10-11 | 2020-02-25 | 武汉华星光电半导体显示技术有限公司 | Touch sensing device and touch display panel |
| CN110750177A (en) * | 2019-10-29 | 2020-02-04 | 武汉天马微电子有限公司 | Touch display panel and touch display device |
| CN110989866A (en) * | 2019-12-03 | 2020-04-10 | 武汉天马微电子有限公司 | Display panel and display device |
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