CN112987978A

CN112987978A - Touch display panel and display device

Info

Publication number: CN112987978A
Application number: CN202110455602.6A
Authority: CN
Inventors: 项大林; 李园园; 薄赜文; 郑美珠; 刘丽娜; 王九镇
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-06-18
Anticipated expiration: 2041-04-26
Also published as: CN112987978B

Abstract

The application discloses touch display panel and display device relates to the technical field of touch. Because at least part of the first electrode wiring of the first touch electrode layer of the touch display panel is covered by the first filtering wiring in the first filtering layer, the light reflectivity of the first filtering layer is smaller, and the light transmissivity and the light absorptivity are larger, the first filtering layer can absorb more external ambient light and the light which is transmitted by the first filtering layer and then reflected by the first touch electrode layer, and the display effect of the touch display panel is ensured.

Description

Touch display panel and display device

Technical Field

The present disclosure relates to touch technologies, and particularly to a touch display panel and a display device.

Background

The touch display panel includes: the display device comprises a display substrate, a touch electrode layer and a detection circuit, wherein the touch electrode layer is positioned on one side of the display substrate, and the detection circuit is electrically connected with the touch electrode layer. The touch electrode layer is usually made of a metal material. When the finger of the user approaches the touch display panel, the detection circuit can detect that the induction quantity of the position of the finger of the user in the touch electrode layer changes, and can determine the position where the induction quantity changes as the touch position.

However, ambient light from the outside is easily reflected by the touch electrode layer, which affects the display effect of the touch display panel.

Disclosure of Invention

The application provides a touch display panel and a display device, which can solve the problem of poor display effect of the touch display panel in the related art. The technical scheme is as follows:

in one aspect, a touch display panel is provided, including:

a display substrate;

the first touch electrode layer is positioned on one side of the display substrate and comprises a plurality of first electrode wires;

the first insulating layer is positioned on one side, far away from the display substrate, of the first touch electrode layer;

and a first filter layer located on a side of the first insulating layer away from the display substrate, the first filter layer comprising: a plurality of first filter traces corresponding to the plurality of first electrode traces, an orthographic projection of the first filter trace on the display substrate covering at least a portion of an orthographic projection of the corresponding first electrode trace on the display substrate;

the light reflectivity of the first filter layer is smaller than that of the first touch electrode layer, the light transmissivity of the first filter layer is larger than that of the first touch electrode layer, and the light absorptivity of the first filter layer is larger than that of the first touch electrode layer.

Optionally, the thickness of the first filter layer is smaller than that of the first touch electrode layer, and/or the material of the first filter layer is different from that of the first touch electrode layer.

Optionally, the display substrate has a plurality of light emitting regions; the first filter layer further includes a plurality of filters corresponding to the plurality of light emitting regions;

the orthographic projection of the optical filter on the display substrate covers the corresponding light-emitting region.

Optionally, the first insulating layer has at least one first via hole, and the first filtering trace is electrically connected to the corresponding first electrode trace through the at least one first via hole.

Optionally, at least one of the first filter traces has a fracture, and an orthographic projection of the fracture on the display substrate is at least partially overlapped with an orthographic projection of the first electrode trace on the display substrate.

Optionally, the first filter trace in a unit area of the touch display panel has at least one fracture, and the unit area is 0.1 square millimeter.

Optionally, the material of the first filter layer includes a metal.

Optionally, the first touch electrode layer includes: the touch control circuit comprises a plurality of first touch control electrodes arranged along a first direction, a plurality of second touch control electrodes arranged along a second direction, a plurality of first signal sub-routing lines and a plurality of second signal sub-routing lines; the touch display panel further comprises a second insulating layer, and the second insulating layer is provided with a plurality of second through holes;

the first signal sub-line is electrically connected with one first touch electrode;

the second touch electrode comprises a plurality of touch sub-electrodes separated by the plurality of first touch electrodes and at least one connecting part; the plurality of touch sub-electrodes and the plurality of first touch electrodes are located on the same layer, the plurality of touch sub-electrodes and the at least one connecting portion are located on two sides of the second insulating layer respectively, the connecting portion is electrically connected with two adjacent touch sub-electrodes through at least two second via holes, and the second signal sub-routing is connected with one touch sub-electrode.

Optionally, the first touch electrode includes a plurality of first touch sub-traces, and the plurality of first touch sub-traces are arranged in a grid shape;

the touch sub-electrode comprises a plurality of second touch sub-wires which are arranged in a grid shape.

Optionally, the first filter routing line of the first filter layer includes: the first filter wirings, the second filter wirings, the third filter wirings and the fourth filter wirings are insulated from each other and located on the same layer;

the first optical filter wire is electrically connected with the first touch sub-wire, the second optical filter wire is electrically connected with the second touch sub-wire, the third optical filter wire is electrically connected with the first signal sub-wire, and the fourth optical filter wire is electrically connected with the second signal sub-wire.

Optionally, the line width of the first filter sub-line is greater than the line width of the first touch sub-line and is smaller than the width of a gap between two adjacent light emitting areas in the display substrate;

the line width of the second light filter sub-line is greater than the line width of the second touch sub-line, and the width of a gap between two adjacent light emitting areas in the display substrate is greater than the line width of the second touch sub-line;

the line width of the third filter sub-wiring is greater than the line width of the first signal sub-wiring;

the line width of the fourth filter sub-wiring is larger than the line width of the second signal sub-wiring.

Optionally, the first touch electrode layer includes: the touch control circuit comprises a plurality of touch control electrode patterns arranged at intervals and a plurality of signal sub-wires correspondingly and electrically connected with the touch control electrode patterns;

the touch electrode pattern comprises a first pattern and a second pattern, the signal sub-routing comprises a first sub-routing and a second sub-routing, the first pattern and the first sub-routing are electrically connected and are positioned on the same layer, and the second pattern and the second sub-routing are electrically connected and are positioned on the same layer;

the touch display panel further comprises a second insulating layer, the second insulating layer is provided with at least one third via hole and at least one fourth via hole, the first pattern and the second pattern are respectively located on two sides of the second insulating layer, the first pattern and the second pattern are electrically connected through the at least one third via hole, and the first sub-routing and the second sub-routing are electrically connected through the at least one fourth via hole.

Optionally, the first pattern includes a plurality of third touch sub-traces, and the plurality of third touch sub-traces are arranged in a grid;

the second pattern comprises a plurality of fourth touch sub-wires which are arranged in a grid shape.

Optionally, the touch display panel further includes: a second touch electrode layer, a third insulating layer and a second filter layer;

the second touch electrode layer is positioned on the other side of the display substrate, the third insulating layer is positioned on one side, away from the display substrate, of the second touch electrode layer, and the second filter layer is positioned on one side, away from the display substrate, of the third insulating layer;

wherein the second touch electrode layer includes a plurality of second electrode traces, and the second filter layer includes: the display substrate comprises a plurality of first electrode wirings, a plurality of second filter wirings corresponding to the plurality of second electrode wirings, wherein the orthographic projection of the second filter wirings on the display substrate covers at least part of the orthographic projection of the corresponding second electrode wirings on the display substrate, the light reflectivity of the second filter layer is smaller than that of the second touch electrode layer, the light transmissivity of the second filter layer is larger than that of the second touch electrode layer, and the light absorptivity of the second filter layer is larger than that of the second touch electrode layer.

In another aspect, there is provided a display device including: a power supply assembly and the touch display panel according to the above aspects;

the power supply assembly is used for supplying power to the touch display panel.

The beneficial effect that technical scheme that this application provided brought includes at least:

the embodiment of the application provides a touch display panel and a display device. Because at least part of the first electrode wiring of the first touch electrode layer of the touch display panel is covered by the first filtering wiring in the first filtering layer, the light reflectivity of the first filtering layer is smaller, and the light transmissivity and the light absorptivity are larger, the first filtering layer can absorb more external ambient light and the light which is transmitted by the first filtering layer and then reflected by the first touch electrode layer, and the display effect of the touch display panel is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of another touch display panel provided in the embodiment of the present application;

fig. 3 is a partial schematic view of a first touch electrode layer and a first filter layer according to an embodiment of the disclosure;

fig. 4 is a schematic structural diagram of a display substrate according to an embodiment of the present disclosure;

fig. 5 is a partial schematic view of a touch display panel according to an embodiment of the present disclosure;

fig. 6 is a partial schematic view of another touch display panel provided in the embodiment of the present application;

FIG. 7 is a schematic diagram of a cathode layer of a sub-pixel provided in an embodiment of the present application;

fig. 8 is a partial schematic view of another touch display panel provided in the embodiment of the present application;

FIG. 9 is a schematic view of FIG. 6 at area A;

fig. 10 is a schematic diagram of a portion of a first filter layer provided in an embodiment of the present application;

fig. 11 is a partial schematic view of another touch display panel provided in the embodiment of the present application;

fig. 12 is a schematic structural diagram of another touch display panel provided in the embodiment of the present application;

FIG. 13 is a schematic view of region B of FIG. 11;

fig. 14 is a partial schematic view of another first filter layer provided in this embodiment of the present application;

FIG. 15 is a cross-sectional view of FIG. 9 taken along direction CC;

FIG. 16 is a cross-sectional view taken along direction DD of FIG. 11;

FIG. 17 is a cross-sectional view of FIG. 11 taken along direction EE;

fig. 18 is a partial schematic view of another touch display panel according to an embodiment of the present disclosure;

FIG. 19 is a cross-sectional view of FIG. 18 in the direction FF;

FIG. 20 is a schematic view of a first pattern provided by an embodiment of the present application;

fig. 21 is a partial schematic view of a further first filter layer provided in an embodiment of the present application;

FIG. 22 is a cross-sectional view taken along GG of FIG. 20;

fig. 23 is a schematic structural diagram of another touch display panel according to an embodiment of the present disclosure;

fig. 24 is a flowchart of a method for manufacturing a touch display panel according to an embodiment of the present disclosure;

fig. 25 is a flowchart of another method for manufacturing a touch display panel according to an embodiment of the present disclosure;

fig. 26 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present disclosure. As can be seen with reference to fig. 1, the touch display panel 10 may include: the display device includes a display substrate 101, a first touch electrode layer 102, a first insulating layer 103, and a first filter layer 104.

Referring to fig. 1, the first touch electrode layer 102 may be located on one side of the display substrate 101, the first insulating layer 103 may be located on one side of the first touch electrode layer 102 away from the display substrate 101, and the first filter layer 104 may be located on one side of the first insulating layer 103 away from the display substrate 101. That is, the first touch electrode layer 102, the first insulating layer 103 and the first filter layer 104 are sequentially stacked along a side away from the display substrate 101.

Referring to fig. 1, the first touch electrode layer 102 includes a plurality of first electrode traces 1021 (one first electrode trace 1021 is shown in fig. 1), and the first filter layer 104 includes a plurality of first filter traces 1041 (one first filter trace 1041 is shown in fig. 1) corresponding to the plurality of first electrode traces 1021. The orthographic projection of the first filter trace 1041 on the display substrate 101 covers at least a portion of the orthographic projection of the corresponding first electrode trace 1021 on the display substrate 101.

For example, the plurality of first electrode traces 1021 and the plurality of first filter traces 1041 correspond to each other one by one, and an orthographic projection of each first filter trace 1041 on the display substrate 101 covers at least a portion of an orthographic projection of the corresponding first electrode trace 1021 on the display substrate 101.

In the embodiment of the present application, the light reflectivity of the first filter layer 104 is smaller than the light reflectivity of the first touch electrode layer 102, the light transmissivity of the first filter layer 104 is greater than the light transmissivity of the first touch electrode layer 102, and the light absorptivity of the first filter layer 104 is greater than the light absorptivity of the first touch electrode layer 102.

After the external ambient light irradiates the first filter layer 104, a first portion of light is reflected by the first filter layer 104, a second portion of light is transmitted by the first filter layer 104, and a third portion of light is absorbed by the first filter layer 104. The second portion of the light transmitted by the first filter layer 104 may irradiate the first touch electrode layer 102 and be reflected by the first touch electrode layer 102. The light reflected by the first touch electrode layer 102 can be irradiated to the first filter layer 104 again, and absorbed, transmitted or reflected by the first filter layer 104.

Since the light reflectivity of the first filter layer 104 is smaller than the light reflectivity of the first touch electrode layer 102, when the external ambient light irradiates the first filter layer 104, the first portion of light reflected by the first filter layer 104 is less. Moreover, the first filter layer 104 has a high light transmittance and a high light absorption, so that when the first filter layer 104 is irradiated by ambient light, less light is transmitted from the first filter layer 104 to the first touch electrode layer 102. Further, less light transmitted to the first touch electrode layer 102 may be reflected by the first touch electrode layer 102, and then may irradiate the first filter layer 104 again, and a part of the light is absorbed by the first filter layer 104. That is, the ambient light from the outside is transmitted from the first filter layer 104 to the first touch electrode layer 102, and is reflected by the first touch electrode layer 102, and the light re-transmitted from the first filter layer 104 is less. That is, the light reflected by the touch display panel 10 from the external ambient light may be less.

The light reflected by the touch display panel 10 may include: when the external ambient light irradiates the first filter layer 104, a first portion of light directly reflected by the first filter layer 104 and light transmitted from the first filter layer 104 to the first touch electrode layer 102 are reflected by the first touch electrode layer 102 and then transmitted from the first filter layer 104.

In the embodiment of the application, at least a portion of the first electrode trace 1021 of the first touch electrode layer 102 is covered by the first filter trace 1041 in the first filter layer 104, so that the first filter layer 104 can absorb external ambient light and light transmitted by the first filter layer 104 and then reflected by the first touch electrode layer, the first touch electrode layer 102 is prevented from being perceived by human eyes, and the display effect of the touch display panel 10 is ensured.

In summary, the embodiment of the present application provides a touch display panel, in which a first filter layer is disposed on a side of a first touch electrode layer of the touch display panel, the side being away from a display substrate. Because at least part of the first electrode wiring of the first touch electrode layer of the touch display panel is covered by the first filtering wiring in the first filtering layer, the light reflectivity of the first filtering layer is smaller, and the light transmissivity and the light absorptivity are larger, the first filtering layer can absorb more external ambient light and the light which is transmitted by the first filtering layer and then reflected by the first touch electrode layer, and the display effect of the touch display panel is ensured.

For example, assuming that the light transmittance of the first filter layer 104 is 40% and the light reflectance of the first touch electrode layer 102 is 100%, the light transmitted from the first filter layer 104 to the first touch electrode layer 102 is 40% of the external ambient light. Then, the target light (40% of the external ambient light) irradiated to the first touch electrode layer 102 is reflected by the first touch electrode layer 102 and the light re-transmitted from the first filter layer 104 may be 40% of the target light. That is, the ambient light from the outside is transmitted from the first filter layer 104 to the first touch electrode layer 102, and is reflected by the first touch electrode layer 102, and the light re-transmitted from the first filter layer 104 is 16% (40% × 40%) of the ambient light from the outside. That is, by disposing the first filter layer 104 on the side of the first touch electrode layer 102 away from the display substrate 101, light reflected by the touch display panel 10 from the external ambient light can be reduced.

Optionally, the thickness of the first filter layer 104 may be smaller than the thickness of the first touch electrode layer 102. In this case, the material of the first filter layer 104 and the material of the first touch electrode layer 102 may be the same or different. By designing the thickness of the first filter layer 104 to be small, the light reflectivity of the first filter layer 104 can be made small, and the light absorptivity and light transmissivity are made large, so that the first filter layer 104 can absorb the external ambient light.

For example, the thickness of the first filter layer 104 may range from 1 nm to 10 nm. The thickness of the first touch electrode layer 102 may range from 0.1 micrometers to 0.5 micrometers.

Alternatively, the material of the first filter layer 104 may be different from the material of the first touch electrode layer 102. In this case, the light reflectance of the material of the first filter layer 104 may be smaller than the light reflectance of the first touch electrode layer 102, the light absorptivity of the material of the first filter layer 104 may be greater than the light absorptivity of the first touch electrode layer 102, and the light transmittance of the material of the first filter layer 104 may be greater than the light transmittance of the first touch electrode layer 102.

Still alternatively, the thickness of the first filter layer 104 is smaller than the thickness of the first touch electrode layer 102, the light reflectance of the material of the first filter layer 104 is smaller than the light reflectance of the material of the first touch electrode layer 102, the light absorptivity of the material of the first filter layer 104 is greater than the light absorptivity of the first touch electrode layer 102, and the light transmittance of the material of the first filter layer 104 is greater than the light transmittance of the first touch electrode layer 102. Therefore, the absorption effect of the first filter layer 104 for absorbing the external ambient light can be further improved, and the display effect of the touch display panel 10 is further ensured.

In the embodiment of the present application, the material of the first filter layer 104 may include a metal. Alternatively, the material of the first filter layer 104 may include aluminum (Al), titanium (Ti), and silicon nitride (SiN). For example, the first filter layer 104 may include a silicon nitride material layer, a titanium material layer, an aluminum material layer, and a titanium material layer in sequence.

In addition, the material of the first touch electrode layer 102 may also include metal. Optionally, the material of the first touch electrode layer 102 may include Al and Ti. For example, the first touch electrode layer 102 may sequentially include a titanium material layer, an aluminum material layer, and a titanium material layer. Alternatively, the material of the first touch electrode layer 102 may include one of silver (Ag) and copper (Cu).

In the embodiment of the application, the light transmittance, the light absorption rate, and the light reflectance of the first filter layer 104 may be determined according to the transparent display requirement of the display substrate 10, so that the light reflectance of the area where the first electrode trace 1021 exists is consistent with the light reflectance of the other areas where the first electrode trace 1021 does not exist, and the display uniformity of the touch display panel 10 is ensured.

Fig. 2 is a schematic structural diagram of another touch display panel according to an embodiment of the present disclosure. Fig. 3 is a partial schematic view of the touch display panel shown in fig. 2. Referring to fig. 2 and 3, the first insulating layer 103 may have at least one first via hole 103 a. The first filter trace 1041 of the first filter layer 104 can be electrically connected to the first touch trace 1021 of the first touch electrode layer 102 through at least one first via hole 103 a.

Moreover, since the first filter layer 104 can be electrically connected to the first touch electrode layer 102, the first touch electrode layer 102 and the first filter layer 104 can simultaneously serve as touch electrodes of the touch display panel 10. Therefore, when the finger of the user approaches the touch display panel 10, the sensing variation of the touch display panel 10 may be large, and the touch performance of the touch display panel 10 can be ensured.

In the embodiment of the present application, referring to fig. 4, the display substrate 101 may include a substrate 1011, and a plurality of pixels 1012 located at one side of the substrate 1011. Only one pixel 1012 is shown in fig. 4. Each pixel 1012 includes a plurality of subpixels 10121 of different colors. Alternatively, referring to fig. 4, each pixel 1012 includes a sub-pixel of a first color, a sub-pixel of a second color, and a sub-pixel of a third color. The first, second and third colors may be three primary colors. For example, the first color is red (R), the second color is green (G), and the third color is blue (B).

The region where each sub-pixel can emit light may be a light emitting region. Referring to fig. 4, since the display substrate 101 includes a plurality of sub-pixels, the display substrate 101 may have a plurality of light emitting regions b. The number of the light-emitting regions b included in the display substrate 101 may be the same as the number of the sub-pixels included in the display substrate 101. For example, 3 sub-pixels 10121 are shown in fig. 4, and 3 light emitting regions b are shown.

Fig. 5 is a partial schematic view of another touch display panel according to an embodiment of the present disclosure. Referring to fig. 5, the first filter layer 104 may further include a plurality of filters 1042 corresponding to the plurality of light emitting regions b. The orthographic projection of the filter 1042 on the display substrate 101 covers the corresponding light-emitting region b. For example, the light emitting regions b correspond to the filters 1042 one to one, and the orthogonal projection of each filter 1042 on the display substrate 101 covers a corresponding light emitting region b.

Optionally, each of the filters 1042 may be in a floating state, where the floating state may mean that the filters 1042 are insulated from each other, and each of the filters 1042 is insulated from any of the first filter traces 1041. In fig. 5, three light-emitting regions b are shown, and correspondingly, three filters 1042 are shown.

Since the display substrate 101 may further include driving traces for driving the sub-pixels to emit light, and an orthographic projection of the driving traces on the substrate 1011 may be located on the light-emitting region b of the display substrate 101, the driving traces may also reflect external ambient light. Therefore, the filter 1042 covers the light emitting region b, so that external ambient light reflected by the driving wires of the light emitting region b can be reduced, and the influence of the driving wires on the display effect of the touch display panel 10 can be avoided. The driving trace can be a gate (gate) signal line or a data (data) signal line.

Moreover, the color of the light that can pass through the filter 1042 may correspond to the color of the sub-pixel to which the light emitting region covered by the filter 1042 belongs. For example, the color of light transmitted through the filter 1042 covering the light-emitting region of the red sub-pixel is red.

Alternatively, referring to fig. 4, each sub-pixel 10121 in the display substrate 101 may include a pixel circuit (not shown) and a light emitting unit a. The pixel circuit may be electrically connected to the light emitting unit a for providing a driving signal to the light emitting unit a. The light emitting unit a may include an anode layer (anode) a1, a light emitting layer (EM) a2, and a cathode layer (cathode) a3 along a direction away from the substrate base plate 101.

The cathode layer of all the sub-pixels in the display substrate 101 may be shared. Alternatively, referring to fig. 6 and 7, the cathode layer of all the sub-pixels in the display substrate 101 may include a plurality of cathode patterns disposed at intervals. Therefore, the cathode layer of the display substrate 101 can be prevented from having a large influence on the light transmittance of the touch display panel 10, and the transparent display of the touch display panel 10 can be conveniently realized. For example, the cathode patterns a3 of a plurality of sub-pixels (e.g., three sub-pixels) included in each pixel may be shared with a gap between the cathode patterns a3 of adjacent pixels.

In the embodiment of the present application, referring to fig. 4, the display substrate 101 may further include a pixel defining layer 1013, where the pixel defining layer 1013 is located on a side of the anode layer a1 of the sub-pixel away from the substrate 101. The pixel defining layer 1013 may have a plurality of openings, and each opening may be used to expose the anode layer a1 of one sub-pixel. The light emitting region b of each sub-pixel may be defined by an opening in the pixel defining layer 1013. The boundary line of the light emitting region b shown in fig. 5 may be the boundary line of the opening of the pixel defining layer 1013 in the display substrate 101.

Fig. 8 is a partial schematic view of another touch display panel according to an embodiment of the present disclosure. Fig. 9 is a schematic view of fig. 6 at area a. Referring to fig. 8 and 9, the orthographic projection of the first electrode trace 1021 included in the first touch electrode layer 102 on the display substrate 101 may be located around the pixel 1012 or inside the pixel 1012. For example, the orthographic projection of the first electrode trace 1021 on the display substrate 101 can be located at the gap of the light-emitting area b of the adjacent sub-pixel 10121 in the pixel, and the orthographic projection of the first electrode trace 1021 on the display substrate 101 does not overlap with the light-emitting area b.

Correspondingly, fig. 10 is a partial schematic view of a first filter layer provided in an embodiment of the present application. Referring to fig. 8 and 10, a position of the first filter trace 1041 in the first filter layer 104 may correspond to a position of the first electrode trace 1021 in the first touch electrode layer 102. Thus, referring to fig. 9, an orthographic projection of the first filter trace 1041 in the first filter layer 104 on the display substrate 101 may be located inside the pixel 1012, in addition to the periphery of the pixel 1012. For example, the orthographic projection of the first filter trace 1041 on the display substrate 101 may be located at a gap between the light emitting areas b of the adjacent sub-pixels 10121 in the pixel, and the orthographic projection of the first filter trace 1041 on the display substrate 101 does not overlap with the light emitting areas b.

As an alternative implementation, referring to fig. 11, the first touch electrode layer 102 includes: the touch panel includes a plurality of first touch electrodes c1 arranged along a first direction X, a plurality of second touch electrodes c2 arranged along a second direction Y, a plurality of first signal sub-traces c3 and a plurality of second signal sub-traces c 4. Also, referring to fig. 12, the touch display panel 10 may further include a second insulating layer 105, and the second insulating layer 105 has a plurality of second via holes. The first direction X may be a pixel row direction of the display substrate, and the second direction Y may be a pixel column direction of the display substrate.

Referring to fig. 11, the first signal sub-trace c3 can be electrically connected to a first touch electrode c1 for providing a touch signal to the first touch electrode c 1. For example, each first signal sub-trace c3 is electrically connected to one first touch electrode c 1. The second touch electrode c2 may include a plurality of touch sub-electrodes c21 spaced apart by a plurality of first touch electrodes c1 and at least one connection portion c 22. For example, each of the second touch electrodes c2 includes a plurality of touch sub-electrodes c21 and at least one connection portion c 22.

Also referring to fig. 12, the plurality of touch sub-electrodes c21 and the plurality of first touch electrodes c1 are located at the same layer, and the plurality of touch sub-electrodes c21 and the at least one connection portion c22 are located at both sides of the second insulating layer 105, respectively. For example, the touch sub-electrodes c21 and the touch electrodes c1 are both located on the side of the second insulating layer 105 away from the display substrate 101, and the connecting portion c22 is located on the side of the second insulating layer 105 close to the display substrate 101.

Optionally, the fact that the plurality of touch sub-electrodes c21 and the plurality of first touch electrodes c1 are located on the same layer may mean that: the plurality of touch sub-electrodes c21 and the plurality of first touch electrodes c1 may be made of the same material and using the same patterning process.

Each connecting portion c22 is electrically connected to two adjacent touch sub-electrodes c21 through at least two second vias, so as to connect the two adjacent touch sub-electrodes c 21. Moreover, each second signal sub-trace c4 can be connected to one touch sub-electrode c21, so as to provide a touch signal to the second touch electrode c2 to which the one touch sub-electrode c21 belongs.

Alternatively, the first touch electrode c1 may be a driving (Tx) electrode, and the second touch electrode c2 may be a sensing (Rx) electrode. Alternatively, the first touch electrode c1 can be a sensing electrode, and the second touch electrode c2 can be a driving electrode. The embodiment of the present application does not limit this. The first touch electrode layer 102 may further include a floating electrode, and the floating electrode may be located at the same layer as the plurality of touch sub-electrodes c21 and the plurality of first touch electrodes c 1. The floating electrode may be insulated from both the touch sub-electrode c21 and the first touch electrode c 1.

As can also be seen from fig. 12, the display substrate 101 of the touch display panel 10 may further include: an encapsulation layer 1014, and a first planarization layer 1015. The encapsulation layer 1014 encapsulates the side of the substrate 1011 on which the sub-pixels 102 are disposed, and the first planarization layer 1015 serves to planarize the display substrate 101. The first planarization layer 1015 may also be a buffer layer (buffer).

Fig. 13 is a schematic view of the region B in fig. 11. As can be seen from fig. 13, the first touch electrode c1 may include a plurality of first touch sub-traces c11, and the plurality of first touch sub-traces c11 may be arranged in a grid. The touch sub-electrode c21 of the second touch electrode c2 includes a plurality of second touch sub-traces c211, and the plurality of second touch sub-traces c211 may be arranged in a grid. Here, the connection part c22 of the second touch electrode c2 is not shown in fig. 13.

In the embodiment of the present invention, the first touch sub-traces c11, the second touch sub-traces c211, the first signal sub-traces c3 and the second signal sub-traces c4 can form the first electrode traces 1021 of the first touch electrode layer 102. That is, in the implementation manner, the plurality of first electrode traces 1021 includes a plurality of first touch sub-traces c11, a plurality of second touch sub-traces c211, a plurality of first signal sub-traces c3 and a plurality of second signal sub-traces c4 located at the same layer. The first touch sub-traces c11 and the second touch sub-traces c211 are insulated from each other.

Optionally, the plurality of first filter traces 1041 of the first filter layer 104 may include: the first filter wires, the second filter wires, the third filter wires and the fourth filter wires are insulated from each other and located on the same layer. Among the plurality of first filter traces 1041, at least a portion of the first filter trace 1041 covering the first touch sub-trace c11 is a first filter trace, at least a portion of the first filter trace 1041 covering the second touch sub-trace c211 is a second filter trace, at least a portion of the first filter trace 1041 covering the first signal sub-trace c3 is a third filter trace, and at least a portion of the first filter trace 1041 covering the second signal sub-trace c4 is a fourth filter trace.

Fig. 14 is a partial schematic view of another first filter layer provided in an embodiment of the present application. The position of the first filter layer shown in fig. 14 may correspond to the position of the first touch electrode layer shown in fig. 13. Referring to fig. 13 and fig. 14, at a position where the first electrode trace 1021 in the first touch electrode layer 102 is disconnected, the first filter trace 1041 of the first filter layer 104 is also disconnected. The first filter trace 1041 has a fracture, and an orthographic projection of the fracture on the display substrate 101 may at least partially overlap with an orthographic projection of the first electrode trace 1021 on the display substrate. Therefore, the area occupied by the first filtering trace 1041 electrically connected with each other can be prevented from being large, accurate identification of the two contacts at a short distance by the touch display panel 10 is ensured, and the touch performance of the touch display panel 10 is ensured.

Optionally, the first filter trace 1041 in each unit area of the touch display panel 10 has at least one fracture 1041 a. And two portions of the first filter trace 1041 separated by the break 1041a are not connected. For example, the unit area may be 0.1 square millimeters (mm)²)。

Fig. 15 is a cross-sectional view of fig. 9 along direction CC. If the first electrode trace 1021 in fig. 9 is the first touch sub-trace c11, the first filter trace 1041 in fig. 15 can be the first filter sub-trace. Thus, referring to fig. 15, the first filter sub-trace may be electrically connected to the first touch sub-trace c11, that is, the signal transmitted in the first filter sub-trace may be the same as the signal transmitted in the first touch sub-trace c 11.

In order to enable the orthographic projection of the first filter sub-trace on the display substrate 101 to cover at least a part of the orthographic projection of the first touch sub-trace c11 on the display substrate 101, the line width of the first filter sub-trace may be greater than the line width of the first touch sub-trace c 11. And since the orthographic projection of the first filter sub-trace on the display substrate 101 can be located at the gap of the light emitting areas of the sub-pixels, the line width of the first filter sub-trace can be smaller than the width of the gap between two adjacent light emitting areas. For example, the line width of the first filter sub-trace may range from 3 micrometers to 20 micrometers.

If the first electrode trace 1021 shown in fig. 15 is the second touch sub-trace c211, the first filter trace 1041 shown in fig. 15 can be the second filter sub-trace. Thus, referring to fig. 15, the second filter sub-trace may be electrically connected to the second touch sub-trace c211, that is, the signal transmitted in the second filter sub-trace may be the same as the signal transmitted in the second touch sub-trace c 211.

In order to enable the orthographic projection of the second filter sub-trace on the display substrate 101 to cover at least a portion of the orthographic projection of the second touch sub-trace c211 on the display substrate 101, the line width of the second filter sub-trace may be greater than the line width of the second touch sub-trace c 211. And since the orthographic projection of the second filter sub-trace on the display substrate 101 can be located at the gap of the light emitting areas of the sub-pixels, the line width of the second filter sub-trace can be smaller than the width of the gap between two adjacent light emitting areas. For example, the line width of the second filter sub-trace may range from 3 micrometers to 20 micrometers.

Fig. 16 is a sectional view of fig. 11 taken along direction DD. Referring to fig. 16, the third filter sub-trace 1041 may be electrically connected to the first signal sub-trace c3, that is, the signal transmitted in the third filter sub-trace 1041 may be the same as the signal transmitted in the first signal sub-trace c 3. Fig. 17 is a sectional view of fig. 11 in the EE direction. Referring to fig. 17, the fourth filter sub-trace 1041 may be electrically connected to the second signal sub-trace c4, that is, the signal transmitted in the fourth filter sub-trace 1041 may be the same as the signal transmitted in the second signal sub-trace c 4.

In order to enable an orthographic projection of the third filter sub-wire on the display substrate 101 to cover at least a part of an orthographic projection of the first signal sub-wire c3 on the display substrate 101, a line width of the third filter sub-wire may be made larger than a line width of the first signal sub-wire c 3. Also, in order to enable an orthographic projection of the fourth filter sub-trace on the display substrate 101 to cover at least a portion of an orthographic projection of the second signal sub-trace c4 on the display substrate 101, a line width of the fourth filter sub-trace may be made larger than a line width of the second signal sub-trace c 4.

In this embodiment, with reference to fig. 15 to 17, the first touch electrode layer 102 may further include: the plurality of first connecting sub-traces d1, the plurality of second connecting sub-traces d2, the plurality of third connecting sub-traces d3, and the plurality of fourth connecting sub-traces d4 are insulated from each other and located on the same layer as the plurality of connecting portions c 22.

The plurality of first connecting sub-traces d1 can be in one-to-one correspondence with the plurality of first touch sub-traces c11, the plurality of second connecting sub-traces d2 can be in one-to-one correspondence with the plurality of second touch sub-traces c211, the plurality of third connecting sub-traces d3 can be in one-to-one correspondence with the plurality of first signal sub-traces c3, and the plurality of fourth connecting sub-traces d4 can be in one-to-one correspondence with the plurality of second signal sub-traces c 4.

If the first electrode trace 1021 shown in fig. 15 is the first touch sub-trace c11, the connecting sub-trace shown in fig. 15 can be the first connecting sub-trace d 1. Referring to fig. 15, the first connecting sub-traces d1 and the first touch sub-traces c11 can be electrically connected through a plurality of fifth vias formed in the second insulating layer 105.

The line width of the first connecting sub-trace d1 may be the same as the line width of the first touch sub-trace c11, or the line width of the first connecting sub-trace d1 may be different from the line width of the first touch sub-trace c 11. In addition, under the condition that the line width of the first connecting sub-trace d1 is different from the line width of the first touch sub-trace c11, the line width of the first connecting sub-trace d1 needs to be smaller than the line width of the first filter trace, so as to ensure that at least a part of the orthographic projection of the first connecting sub-trace d1 on the display substrate 101 is covered by the orthographic projection of the first filter trace on the display substrate 101, and avoid the influence of the first connecting sub-trace d1 on the display effect of the touch display panel 10.

If the first electrode trace 1021 in fig. 15 is the second touch sub-trace c211, the connecting sub-trace in fig. 15 can be the second connecting sub-trace d 2. Referring to fig. 15, the second connecting sub-traces d2 and the second touch sub-traces c211 can be electrically connected through a plurality of sixth vias of the second insulating layer 105.

The line width of the second connecting sub-trace d2 can be the same as the line width of the second touch sub-trace c211, or the line width of the second connecting sub-trace d2 can be different from the line width of the second touch sub-trace c 211. In addition, under the condition that the line width of the second connecting sub-trace d2 is different from the line width of the second touch sub-trace c211, the line width of the second connecting sub-trace d2 needs to be smaller than the line width of the second filter trace, so as to ensure that at least a part of the orthographic projection of the second connecting sub-trace d2 on the display substrate 101 is covered by the orthographic projection of the second filter trace on the display substrate 101, and avoid the influence of the second connecting sub-trace d2 on the display effect of the touch display panel 10.

Referring to fig. 16, the plurality of third connection sub-traces d3 may be electrically connected with the plurality of first signal sub-traces c3 through the plurality of seventh vias provided in the second insulating layer 105. The line width of the third connecting sub-trace d3 may be the same as the line width of the first signal sub-trace c3, or the line width of the third connecting sub-trace d3 may be different from the line width of the first signal sub-trace c 3. In addition, under the condition that the line width of the third connecting sub-trace d3 is different from the line width of the first signal sub-trace c3, the line width of the third connecting sub-trace d3 needs to be smaller than the line width of the third filter trace, so as to ensure that at least a part of the orthographic projection of the third connecting sub-trace d3 on the display substrate 101 is covered by the orthographic projection of the third filter trace on the display substrate 101, and avoid the influence of the third connecting sub-trace d3 on the display effect of the touch display panel 10.

Referring to fig. 17, the plurality of fourth connection sub-traces d4 may be electrically connected with the plurality of second signal sub-traces c4 through a plurality of eighth vias provided in the second insulating layer 105. The line width of the fourth connecting sub-trace d4 may be the same as the line width of the second signal sub-trace c4, or the line width of the fourth connecting sub-trace d4 may be different from the line width of the second signal sub-trace c 4. In addition, under the condition that the line width of the fourth connecting sub-trace d4 is different from the line width of the second signal sub-trace c4, the line width of the fourth connecting sub-trace d4 needs to be smaller than the line width of the fourth filter trace, so as to ensure that at least a part of the orthographic projection of the fourth connecting sub-trace d4 on the display substrate 101 is covered by the orthographic projection of the fourth filter trace on the display substrate 101, and avoid the influence of the fourth connecting sub-trace d4 on the display effect of the touch display panel 10.

Optionally, in this implementation manner, the touch display panel 10 may further include a driving circuit electrically connected to the first signal sub-trace c3, and a detecting circuit electrically connected to the second signal sub-trace c 4. The driving circuit is configured to provide a signal to the first signal sub-trace c3, and the detection circuit is configured to determine a touch position of the touch display panel 10 according to a change in an induction amount of the signal received from the second signal sub-trace c4, so as to implement a touch function of the touch display panel 10.

As another alternative implementation, referring to fig. 18, the first touch electrode layer 102 may include: a plurality of touch electrode patterns e1 arranged at intervals, and a plurality of signal sub-traces e2 electrically connected with the plurality of touch electrode patterns e1 in a one-to-one correspondence. Each touch electrode pattern e1 includes a first pattern e11 and a second pattern e12, and each signal sub-trace e2 includes a first sub-trace e21 and a second sub-trace e 22. Optionally, the first pattern e11 may be electrically connected to the first sub-trace e21 and located on the same layer, and the second pattern e12 may be electrically connected to the second sub-trace e22 and located on the same layer.

In the embodiment of the present application, for each touch electrode pattern e1, the shape of the orthographic projection of the first pattern e11 of the touch electrode pattern e1 on the display substrate 101 may be the same as the shape of the orthographic projection of the second pattern e12 on the display substrate 101, and the orthographic projection of the first pattern e11 on the display substrate 101 may overlap with the orthographic projection of the second pattern e12 on the display substrate 101, so each square in fig. 18 represents the first pattern e11 and the second pattern e12 in the touch electrode pattern e1, and is labeled with e11/e 12. Moreover, for each signal sub-trace e2, the shape of the orthographic projection of the first sub-trace e21 of the signal sub-trace e2 on the display substrate 101 may be the same as the shape of the orthographic projection of the second sub-trace e22 on the display substrate 101, and the orthographic projection of the first sub-trace e21 on the display substrate 101 may overlap with the orthographic projection of the second sub-trace e22 on the display substrate 101, so in fig. 18, each trace represents the first sub-trace e21 and the second sub-trace e22 in the signal sub-trace e2 and is labeled with e21/e 22.

Fig. 19 is a sectional view of fig. 18 in the direction FF. Referring to fig. 19, the touch display panel 10 may further include a second insulating layer 105. The second insulating layer 105 has at least one third via and at least one fourth via. The first sub-trace e21 and the second sub-trace e22 can be respectively located at two sides of the second insulating layer 105, and the first sub-trace e21 and the second sub-trace e22 can be electrically connected through at least one fourth via. Wherein two first sub-traces e21 and two second sub-traces e22 are shown in fig. 19, and one fourth via is shown.

For example, in fig. 19, the first sub-trace e21 is located on a side of the second insulating layer 105 close to the display substrate 101, and the second sub-trace e22 is located on a side of the second insulating layer 105 away from the display substrate 101. Of course, the positions of the first sub-trace e21 and the second sub-trace e22 can be interchanged, and this embodiment of the present application does not limit this.

In the embodiment of the present application, since the first pattern e11 and the first sub-trace e21 are located on the same layer, and the second pattern e12 and the second sub-trace e22 are located on the same layer, the first pattern e11 and the second pattern e12 are also located on two sides of the second insulating layer 105, respectively. For example, the first pattern e11 and the second pattern e12 may be electrically connected through at least one third via.

Since the first pattern e11 is electrically connected with the second pattern e12, the first sub-trace e21 is electrically connected with the second sub-trace e22, the first pattern e11 is electrically connected with the first sub-trace e21, and the second pattern e12 is electrically connected with the second sub-trace e22, the first pattern e11, the second pattern e12, the first sub-trace e21 and the second sub-trace e22 can all be electrically connected. That is, the signals transmitted in the first pattern e11, the second pattern e12, the first sub-trace e21 and the second sub-trace e22 are all the same, the touch electrode of the touch display panel 10 is formed by two layers of patterns, the sensing variation of the touch display panel 10 can be large, and the touch performance of the touch display panel 10 can be ensured.

Fig. 20 is a schematic diagram of a first pattern provided in an embodiment of the present application. As can be seen in fig. 20, the first pattern e11 may include a plurality of third touch sub-traces e 111. Moreover, the plurality of third touch sub-traces e111 included in the first pattern e11 may be arranged in a grid.

In addition, the second pattern e12 may include a plurality of fourth touch sub-traces e 112. Since the shape of the second pattern e12 can be the same as that of the first pattern e11, if the third touch sub-trace e111 in fig. 20 is replaced by the fourth touch sub-trace e112, a schematic diagram of the second pattern e12 can be obtained, and the second pattern e12 is not separately illustrated in the embodiment of the present application. The plurality of fourth touch sub-traces e112 included in the second pattern e12 may be arranged in a grid.

In the embodiment of the present invention, the plurality of third touch sub-traces e111, the plurality of fourth touch sub-traces e112, and the plurality of signal sub-traces e2 may form the plurality of first electrode traces 1021 of the first touch electrode layer 102. That is, in the implementation manner, the plurality of first electrode traces 1021 includes a plurality of third touch sub-traces e111, a plurality of fourth touch sub-traces e112 and a plurality of signal sub-traces e 2.

Optionally, the plurality of first filter traces 1041 of the first filter layer 104 may include: a plurality of fifth filter sub-traces and a plurality of sixth filter sub-traces. Among the plurality of first filter traces 1041, the first filter trace 1041 covering at least a part of the third touch sub-trace e111 (or the fourth touch sub-trace e112) is a fifth filter trace, and the first filter trace 1041 covering at least a part of the signal sub-trace e2 is a sixth filter trace.

Fig. 21 is a partial schematic view of another first filter layer provided in an embodiment of the present application. The position of the first filter layer shown in fig. 21 may correspond to the position of the first touch electrode layer shown in fig. 20. With reference to fig. 20 and fig. 21, the first electrode trace 1021 in the first touch electrode layer 102 is not disconnected, the first filter trace 1041 has a fracture 1041a, and an orthographic projection of the fracture 1041a on the display substrate 101 may at least partially overlap with an orthographic projection of the first electrode trace 1021 on the display substrate 101. Therefore, the area occupied by the first filtering trace 1041 electrically connected with each other can be prevented from being large, accurate identification of the two contacts at a short distance by the touch display panel 10 is ensured, and the touch performance of the touch display panel 10 is ensured.

FIG. 22 is a cross-sectional view of FIG. 20 taken along the direction GG. The first filter trace 1041 in fig. 22 may be a fifth filter sub-trace. The fifth filter trace may be electrically connected to the third touch sub-trace e111 and the fourth touch sub-trace e112, that is, the signal transmitted in the fifth filter trace may be the same as the signal transmitted in the third touch sub-trace e111 and the fourth touch sub-trace e 112. And the first filter trace 1041 in fig. 19 is a sixth filter trace. The sixth filter sub-trace may be electrically connected to the first sub-trace e21 and the second sub-trace e22, that is, the signals transmitted in the sixth filter sub-trace may be the same as the signals transmitted in the first sub-trace e21 and the second sub-trace e 22.

In order to enable the orthographic projection of the fifth filter trace on the display substrate 101 to cover at least a part of the orthographic projection of the third touch sub trace e111 on the display substrate 101 and at least a part of the orthographic projection of the fourth touch sub trace e112 on the display substrate 101, the line width of the fifth filter trace can be larger than the line width of the third touch sub trace e111 and larger than the line width of the fourth touch sub trace e 112. In addition, in order to enable the orthographic projection of the sixth filter sub-trace on the display substrate 101 to cover at least a part of the orthographic projection of the first sub-trace e21 on the display substrate 101 and at least a part of the orthographic projection of the second sub-trace e22 on the display substrate 101, the line width of the sixth filter sub-trace may be greater than the line width of the first sub-trace e21 and greater than the line width of the second sub-trace e 22.

In the embodiment of the present invention, the third touch sub-trace e111 and the fourth touch sub-trace e112 in the first touch electrode layer 102 and the fifth filter sub-trace in the first filter layer 104 are electrically connected, so that the first touch electrode layer 102 and the first filter layer 104 can be simultaneously used as touch electrodes of the touch display panel 10. Therefore, the sensing variation of the touch display panel 10 can be large, and the touch performance of the touch display panel 10 can be ensured.

Optionally, in this implementation manner, the touch display panel 10 may further include a driving circuit electrically connected to the signal sub-trace e2, and a detecting circuit electrically connected to the touch electrode pattern e 1. The driving circuit is configured to provide a signal for the signal sub-trace e2, and the detection circuit is configured to determine a touch position of the touch display panel 10 according to a variation in an amount of induction between the touch electrode pattern e1 and an obstacle, so as to implement a touch function of the touch display panel 10.

In the embodiment of the present application, the display substrate 101 may be an organic light-emitting diode (OLED) display substrate. Referring to fig. 12, fig. 15 to 17, fig. 19 and fig. 22, it can be seen that the touch display panel 10 may further include: a second planar layer 106 and a first cover plate 107. The second planarization layer 106 is located on a side of the first filter layer 104 away from the display substrate 101, and the first cover plate 107 is located on a side of the second planarization layer 106 away from the display substrate 101.

Wherein the first cover plate 107 can be bonded to the second flat layer 106 by an optical glue. The second planarization layer 106 is used for planarizing one side of the touch display panel 10 where the first touch electrode layer 102 is disposed on the display substrate 101, and the first cover plate 107 is used for encapsulating the touch display panel 10, so as to prevent the film layer in the touch display panel 10 from being damaged.

Fig. 23 is a schematic structural diagram of another touch display panel according to an embodiment of the present disclosure. As can be seen with reference to fig. 23, the touch display panel 10 may further include: a second touch electrode layer 108, a third insulating layer 109, and a second filter layer 110. The second touch electrode layer 108 may be located on the other side of the display substrate 101, the third insulating layer 109 may be located on the side of the second touch electrode layer 108 away from the display substrate 101, and the second filter layer 110 is located on the side of the third insulating layer 109 away from the display substrate 101.

The second touch electrode layer 108 may include a plurality of second electrode traces, and the second filter layer 110 may include a plurality of second filter traces corresponding to the plurality of second electrode traces. For example, the plurality of second electrode traces correspond to the plurality of second filter traces one to one. The orthographic projection of the second light filtering wires on the display substrate covers at least part of the orthographic projection of the corresponding second electrode wires on the display substrate. For example, the orthographic projection of each second filter trace on the display substrate covers at least part of the orthographic projection of the corresponding second electrode trace on the display substrate.

The light reflectivity of the second filter layer 110 is less than the light reflectivity of the second touch electrode layer 108, the light transmittance of the second filter layer 110 is greater than the light transmittance of the second touch electrode layer 108, and the light absorptivity of the second filter layer 110 is greater than the light absorptivity of the second touch electrode layer 108.

Optionally, the structure of the second electrode trace in the second touch electrode layer 108 may be the same as the structure of the first electrode trace 1021 in the first touch electrode layer 102, the structure of the third insulating layer 109 may be the same as the structure of the first insulating layer 103, and the structure of the second filter trace in the second filter layer 110 may be the same as the structure of the first filter trace 1041 in the first filter layer 104. In the embodiment of the present application, details of the second touch electrode layer 108, the third insulating layer 109 and the second filter layer 110 are not described in detail, and details of the second touch electrode layer 108 may refer to the details described above with respect to the first touch electrode layer 102, details of the third insulating layer 109 may refer to the details described above with respect to the first insulating layer 103, and details of the second filter layer 110 may refer to the details described above with respect to the first filter layer 104.

The touch display panel 10 of the embodiment of the application can enable both sides of the touch display panel 10 to realize a touch function by respectively providing the touch electrode layers on both sides of the display substrate 101, that is, the touch display panel 10 can be a double-sided touch display panel 10.

Optionally, the touch display panel 10 may further include: a third flat layer 111, a fourth flat layer 112 and a second cover plate 113. The third flat layer 111 may be located between the display substrate 101 and the second touch electrode layer 108, the fourth flat layer 112 may be located on a side of the second filter layer 112 away from the second touch electrode layer 108, and the second cover plate 113 may be located on a side of the fourth flat layer 112 away from the second touch electrode layer 108. Wherein the second cover plate 113 may be bonded to the fourth flat layer 112 by an optical glue.

Fig. 24 is a flowchart of a method for manufacturing a touch display panel according to an embodiment of the present disclosure. The method can be used for preparing the touch display panel 10 provided by the above embodiment. Referring to fig. 24, the method may include:

step 201, a display substrate is provided.

In the embodiment of the present application, the display substrate may be an OLED display substrate.

Step 202, a first touch electrode layer is formed on one side of the display substrate.

The first touch electrode layer comprises a plurality of first electrode routing lines.

Step 203, forming a first insulating layer on a side of the first touch electrode layer away from the display substrate.

Step 204, forming a first filter layer on one side of the first insulating layer away from the display substrate.

The first filter layer 104 includes a plurality of first filter traces corresponding to the plurality of first electrode traces one to one. The orthographic projection of the first filter trace on the display substrate 101 may cover at least a portion of the orthographic projection of the corresponding first electrode trace on the display substrate 101.

In summary, the embodiment of the present application provides a method for manufacturing a touch display panel, where a first filter layer is disposed on a side, away from a display substrate, of a first touch electrode layer of the touch display panel manufactured by the method. Because at least part of the first electrode wiring of the first touch electrode layer of the touch display panel is covered by the first filtering wiring in the first filtering layer, the light reflectivity of the first filtering layer is smaller, and the light transmissivity and the light absorptivity are larger, the first filtering layer can absorb more external ambient light and the light which is transmitted by the first filtering layer and then reflected by the first touch electrode layer, and the display effect of the touch display panel is ensured.

Fig. 25 is a flowchart of another touch display panel according to an embodiment of the present disclosure. The method can be used for preparing the touch display panel provided in the above embodiment, for example, the touch display panel shown in fig. 12 is taken as an example for description. Referring to fig. 25, the method may include:

step 301, a substrate is provided.

The material of the substrate 1011 may be a flexible material, such as Polyimide (PI).

Step 302 forms an anode layer of a plurality of sub-pixels on one side of a substrate.

In the present embodiment, after the substrate base plate 1011 is obtained, an anode thin film may be formed on one side of the substrate base plate 1011. And then, processing the anode film by adopting a patterning processing technology to obtain anode layers of a plurality of sub-pixels, wherein gaps are formed between the anode layers of any two adjacent sub-pixels. The patterning process may include: photoresist coating, exposing, developing, etching, and removing the photoresist. This patterning process may also be referred to as a photolithography process.

Step 303, forming a pixel defining layer on a side of the anode layer of the plurality of sub-pixels away from the substrate.

In the embodiment of the present application, after the anode layer of the plurality of sub-pixels is formed, the pixel defining thin film may be formed on a side of the anode layer of the plurality of sub-pixels away from the substrate 101. And then, processing the pixel defining film by adopting a patterning processing technology to obtain a pixel defining layer. The pixel defining layer has a plurality of openings therein, each opening for exposing the anode layer of one of the sub-pixels.

Optionally, different masks are used when patterning processing is performed on different films. That is, the mask used when the patterning process is performed on the pixel defining film is different from the mask used when the patterning process is performed on the anode film.

Step 304, forming a plurality of light emitting layers of the sub-pixels on the side of the pixel defining layer away from the substrate.

In the embodiment of the present application, after the pixel defining layer is formed, a light emitting film may be formed on a side of the pixel defining layer away from the base substrate. And then, processing the light-emitting film by adopting a patterning processing technology to obtain light-emitting layers of a plurality of sub-pixels. The light emitting layer of each sub-pixel may be located in an opening of the pixel defining layer, and contact with the anode layer exposed by the opening.

Step 305, forming cathode layers of the plurality of sub-pixels on the side of the light emitting layers of the plurality of sub-pixels far away from the substrate.

In the embodiment of the present application, the cathode layers of all the sub-pixels may be shared. Alternatively, the cathode layers of all the sub-pixels may include a plurality of cathode patterns disposed at intervals, thereby facilitating transparent display of the touch display panel 10. For example, the cathode patterns a3 of a plurality of sub-pixels (e.g., three sub-pixels) included in each pixel may be shared with a gap between the cathode patterns a3 of adjacent pixels.

The cathode pattern may be obtained by processing the cathode thin film by a patterning process after the cathode thin film is formed.

And step 306, forming an encapsulation layer and a first flat layer on the side, away from the substrate base plate, of the cathode layers of the plurality of sub-pixels.

In the embodiment of the present application, the encapsulation layer and the first planarization layer may be prepared by at least one of a vapor deposition process and a spin coating process.

And 307, forming a connecting part on one side of the first flat layer far away from the substrate base plate.

In the embodiment of the application, a connection film may be formed on a side of the first planarization layer away from the substrate, and the connection film may be processed by a patterning process to obtain a connection portion.

And 308, forming a second insulating layer on one side of the connecting part far away from the substrate base plate.

In an embodiment of the present application, the second insulating layer may be prepared by at least one of a vapor deposition process and a spin-on process. The second insulating layer may have a plurality of second vias therein, each of which may be used to expose at least a portion of one of the connections.

Step 309, forming a plurality of first touch electrodes, a plurality of touch sub-electrodes, a plurality of first signal sub-traces and a plurality of second signal sub-traces on a side of the second insulating layer away from the substrate.

In this embodiment, a touch thin film may be formed on a side of the second insulating layer away from the substrate, and the touch thin film is processed by a patterning process to obtain a plurality of first touch electrodes, a plurality of touch sub-electrodes, a plurality of first signal sub-traces and a plurality of second signal sub-traces. That is, the plurality of first touch electrodes, the plurality of touch sub-electrodes, the plurality of first signal sub-traces and the plurality of second signal sub-traces may be fabricated by the same patterning process.

Each connecting part is electrically connected with two adjacent touch sub-electrodes through at least two second through holes, and the connecting part and the touch sub-electrodes which are mutually connected in series form a second touch electrode. For example, a plurality of second touch electrodes arranged in the second direction may be configured. In addition, the plurality of first touch electrodes are arranged along a first direction. Each first signal sub-trace can be electrically connected with one first touch electrode to provide signals for the first touch electrode. Each second signal sub-trace can be electrically connected with one touch sub-electrode to provide signals for the touch sub-electrode.

It should be noted that the plurality of first touch electrodes, the plurality of touch sub-electrodes, the plurality of first signal sub-traces, the plurality of second signal sub-traces and the connecting portion formed in step 307 may be collectively referred to as a first touch electrode layer.

In step 310, a first insulating layer is formed on a side of the plurality of first touch electrodes away from the substrate.

In an embodiment of the present application, the second insulating layer may be prepared by at least one of a vapor deposition process and a spin-on process. The second insulating layer may have a plurality of first vias therein, and each first via may be configured to expose at least a portion of one first touch electrode, or expose at least a portion of one touch sub-electrode, or expose at least a portion of a first signal sub-trace, or expose at least a portion of a second signal sub-trace.

Step 311, a first filter layer is formed on one side of the first insulating layer away from the substrate.

In this embodiment, after the first insulating layer is formed, a first filter film may be formed on a side of the first insulating layer away from the substrate, and the first filter film may be processed by a patterning process to obtain a first filter layer. The first filter layer includes a plurality of first filter traces.

And step 312, sequentially forming a second flat layer and a first cover plate on the side, away from the substrate, of the first filter layer.

In the embodiment of the present application, the second planarization layer may be prepared by at least one of a vapor deposition process and a spin coating process. The first cover plate may be bonded to the second planar layer by an optical glue.

In the embodiments of the present application, each of the planarization layers is also typically made of an insulating material, and thus each of the planarization layers may also be referred to as an insulating layer. Each of the insulating layers may be prepared using at least one of a vapor deposition process and a spin-on process.

Fig. 26 is a schematic structural diagram of a display device according to an embodiment of the present application. Referring to fig. 26, the display device may include: the power supply assembly 40 and the touch display panel 10 provided in the above embodiments. The power supply component 40 can be used to supply power to the touch display panel 10.

In the embodiment of the present application, the light transmittance of the touch display panel 10 in the display device is good, so that the display device can achieve not only the effect of transparency but also the effect of displaying images. Alternatively, the display device can be applied to a scene with transparent display. For example, a windshield (e.g., a side windshield) of a vehicle may be the display device in the embodiment of the present application, and in the case where the display device does not display an image, the windshield (display device) may be in a transparent state. Alternatively, the packaging glass of the department display window, the transparent refrigerator door and the packaging glass of the vending machine can be the display device in the embodiment of the application.

Optionally, the display device may be any product or component having a display function and a fingerprint identification function, such as an OLED touch display device, electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, or a navigator.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A touch display panel, comprising:

a display substrate;

2. The touch display panel according to claim 1, wherein a thickness of the first optical filter layer is smaller than a thickness of the first touch electrode layer, and/or wherein a material of the first optical filter layer is different from a material of the first touch electrode layer.

3. The touch display panel according to claim 1, wherein the display substrate has a plurality of light-emitting regions; the first filter layer further includes a plurality of filters corresponding to the plurality of light emitting regions;

4. The touch display panel according to any one of claims 1 to 3, wherein the first insulating layer has at least one first via hole, and the first filter trace is electrically connected to the corresponding first electrode trace through the at least one first via hole.

5. The touch display panel according to any one of claims 1 to 3, wherein at least one of the first filter traces has a break, and an orthographic projection of the break on the display substrate at least partially overlaps with an orthographic projection of the first electrode trace on the display substrate.

6. The touch display panel according to claim 5, wherein the first filter trace in a unit area of the touch display panel has at least one break, and the unit area is 0.1 mm square.

7. The touch display panel according to any one of claims 1 to 3, wherein the material of the first filter layer comprises a metal.

8. The touch display panel according to any one of claims 1 to 3, wherein the first touch electrode layer comprises: the touch control circuit comprises a plurality of first touch control electrodes arranged along a first direction, a plurality of second touch control electrodes arranged along a second direction, a plurality of first signal sub-routing lines and a plurality of second signal sub-routing lines; the touch display panel further comprises a second insulating layer, and the second insulating layer is provided with a plurality of second through holes;

9. The touch display panel according to claim 8, wherein the first touch electrode includes a plurality of first touch sub-traces, and the plurality of first touch sub-traces are arranged in a grid;

10. The touch display panel of claim 9, wherein the first filter trace of the first filter layer comprises: the first filter wirings, the second filter wirings, the third filter wirings and the fourth filter wirings are insulated from each other and located on the same layer;

11. The touch display panel of claim 10,

the line width of the first light filter sub-line is greater than the line width of the first touch sub-line and is less than the width of a gap between two adjacent light emitting areas in the display substrate;

12. The touch display panel according to any one of claims 1 to 3, wherein the first touch electrode layer comprises: the touch control circuit comprises a plurality of touch control electrode patterns arranged at intervals and a plurality of signal sub-wires correspondingly and electrically connected with the touch control electrode patterns;

13. The touch display panel according to claim 12, wherein the first pattern includes a plurality of third touch sub-traces, and the plurality of third touch sub-traces are arranged in a grid;

14. The touch display panel according to any one of claims 1 to 3, wherein the touch display panel further comprises: a second touch electrode layer, a third insulating layer and a second filter layer;

15. A display device, characterized in that the display device comprises: a power supply assembly and a touch display panel according to any one of claims 1 to 14;