CN112987978B

CN112987978B - Touch display panel and display device

Info

Publication number: CN112987978B
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: 2023-12-22
Anticipated expiration: 2041-04-26
Also published as: CN112987978A

Abstract

The application discloses a touch display panel and a display device, and relates to the technical field of touch. Because the first electrode wiring of the first touch electrode layer of the touch display panel is at least partially covered by the first light filtering wiring in the first light filtering layer, and the light reflectivity of the first light filtering layer is smaller, and the light transmittance and the light absorptivity are larger, the first light filtering layer can absorb more external environment light and light reflected by the first touch electrode layer after being transmitted by the first light filtering layer, so that 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 technology, and more particularly, to a touch display panel and a display device.

Background

The touch display panel includes: the touch display comprises a display substrate, a touch electrode layer positioned on one side of the display substrate and a detection circuit electrically connected with the touch electrode layer. The touch electrode layer is generally made of a metal material. When the finger of the user approaches the touch display panel, the detection circuit can detect that the sensing amount of the position of the finger of the user in the touch electrode layer changes, and the position where the sensing amount changes can be determined as the touch position.

However, the external ambient light 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 technology. The technical scheme is as follows:

in one aspect, a touch display panel is provided, the touch display panel 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 of the first touch electrode layer away from the display substrate;

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

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

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

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

Optionally, the first insulating layer has at least one first via hole, and the first filter wire and the corresponding first electrode wire are electrically connected through the at least one first via hole.

Optionally, at least one of the first filter wires 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 wire 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: a plurality of first touch electrodes arranged along a first direction, a plurality of second touch electrodes arranged along a second direction, a plurality of first signal sub-wires and a plurality of second signal sub-wires; 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-wiring is electrically connected with one first touch electrode;

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

Optionally, the first touch electrode includes a plurality of first touch sub-wires, and the plurality of first touch sub-wires 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 trace of the first filter layer includes: a plurality of first filter sub-traces, a plurality of second filter sub-traces, a plurality of third filter sub-traces and a plurality of fourth filter sub-traces insulated from each other and located on the same layer;

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

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

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

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

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

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

the touch electrode pattern comprises a first pattern and a second pattern, the signal sub-wiring comprises a first sub-wiring and a second sub-wiring, the first pattern and the first sub-wiring are electrically connected and positioned on the same layer, and the second pattern and the second sub-wiring are electrically connected and 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-wiring and the second sub-wiring are electrically connected through the at least one fourth via hole.

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

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

Optionally, the touch display panel further includes: the second touch electrode layer, the third insulating layer and the 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 of the second touch electrode layer away from the display substrate, and the second filter layer is positioned on one side of the third insulating layer away from the display substrate;

the second touch electrode layer includes a plurality of second electrode wires, and the second filter layer includes: and the second light filtering wires correspond to the second electrode wires, 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, the light reflectivity of the second light filtering layer is smaller than that of the second touch electrode layer, the light transmittance of the second light filtering layer is larger than that of the second touch electrode layer, and the light absorptivity of the second light filtering 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 a touch display panel as described in the above aspects;

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

The beneficial effects that this application provided technical scheme brought include at least:

the embodiment of the application provides a touch display panel and a display device, wherein a first filter layer is arranged on one side, far away from a display substrate, of a first touch electrode layer of the touch display panel. Because the first electrode wiring of the first touch electrode layer of the touch display panel is at least partially covered by the first light filtering wiring in the first light filtering layer, and the light reflectivity of the first light filtering layer is smaller, and the light transmittance and the light absorptivity are larger, the first light filtering layer can absorb more external environment light and light reflected by the first touch electrode layer after being transmitted by the first light filtering layer, so that the display effect of the touch display panel is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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 according to an embodiment of the present disclosure;

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

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

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

fig. 6 is a schematic partial view of another touch display panel according to an embodiment of the disclosure;

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

fig. 8 is a schematic partial view of another touch display panel according to an embodiment of the disclosure;

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 according to an embodiment of the disclosure;

FIG. 11 is a schematic diagram illustrating a portion of a touch display panel according to another embodiment of the disclosure;

fig. 12 is a schematic structural diagram of another touch display panel according to an embodiment of the disclosure;

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

FIG. 14 is a schematic view of a portion of another first filter layer according to an embodiment of the present disclosure;

Fig. 15 is a sectional view of fig. 9 along the CC direction;

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

fig. 17 is a sectional view of fig. 11 taken along the EE direction;

FIG. 18 is a schematic diagram illustrating a portion of a touch display panel according to another embodiment of the disclosure;

fig. 19 is a sectional view of fig. 18 along FF;

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

FIG. 21 is a schematic view of a portion of another first filter layer according to an embodiment of the present disclosure;

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

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

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the 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 application. As can be seen with reference to fig. 1, the touch display panel 10 may include: the touch screen comprises 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 a side of the display substrate 101, the first insulating layer 103 may be located on a side of the first touch electrode layer 102 away from the display substrate 101, and the first filter layer 104 may be located on a 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 front projection of the first filter trace 1041 on the display substrate 101 covers at least a portion of the front 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 are in one-to-one correspondence, and the front projection of each first filter trace 1041 on the display substrate 101 covers at least a portion of the front projection of the corresponding first electrode trace 1021 on the display substrate 101.

In this 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 transmittance of the first filter layer 104 is greater than the light transmittance 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 the light is reflected by the first filter layer 104, a second portion of the light is transmitted by the first filter layer 104, and a third portion of the light is absorbed by the first filter layer 104. The second portion of the light transmitted by the first filter layer 104 may be irradiated to the first touch electrode layer 102 and 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 ambient light from the outside irradiates the first filter layer 104, the first portion of the light reflected by the first filter layer 104 is less. Since the first filter layer 104 has a large light transmittance and light absorptivity, when the first filter layer 104 is irradiated with ambient light, light transmitted from the first filter layer 104 to the first touch electrode layer 102 is small. Further, less light transmitted to the first touch electrode layer 102 may be reflected by the first touch electrode layer 102, then re-irradiated to the first filter layer 104, and absorbed by a part of the first filter layer 104. That is, the ambient light is transmitted from the first filter layer 104 to the first touch electrode layer 102, and less light is reflected by the first touch electrode layer 102 and is transmitted from the first filter layer 104. 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 the light directly reflected by the first filter layer 104 and the light transmitted from the first filter layer 104 to the first touch electrode layer 102 and reflected by the first touch electrode layer 102 and transmitted from the first filter layer 104 are irradiated.

In this embodiment of the present 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 reflected by the first touch electrode layer, thereby avoiding the first touch electrode layer 102 from being perceived by human eyes and ensuring the display effect of the touch display panel 10.

In summary, the embodiment of the 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 away from a display substrate. Because the first electrode wiring of the first touch electrode layer of the touch display panel is at least partially covered by the first light filtering wiring in the first light filtering layer, and the light reflectivity of the first light filtering layer is smaller, and the light transmittance and the light absorptivity are larger, the first light filtering layer can absorb more external environment light and light reflected by the first touch electrode layer after being transmitted by the first light filtering layer, so that 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 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 transmitted through the first filter layer 104 again may be 40% of the target light. That is, the external ambient light is transmitted from the first filter layer 104 to the first touch electrode layer 102, and the light reflected by the first touch electrode layer 102 and retransmitted from the first filter layer 104 is 16% (40% ×40%) of the external ambient light. 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, the 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 may be the same as or different from the material of the first touch electrode layer 102. By designing the thickness of the first filter layer 104 to be smaller, the light reflectivity of the first filter layer 104 can be made smaller, the light absorptivity and light transmittance can be made larger, and the first filter layer 104 can be made to 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 reflectivity of the material of the first filter layer 104 may be made smaller than the light reflectivity 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 transmissivity of the material of the first filter layer 104 is greater than the light transmissivity of the first touch electrode layer 102.

Alternatively, the thickness of the first filter layer 104 is smaller than the thickness of the first touch electrode layer 102, and the light reflectivity of the material of the first filter layer 104 is smaller than the light reflectivity of the material of the first touch electrode layer 102, the light absorptivity of the material of the first filter layer 104 is larger than the light absorptivity of the first touch electrode layer 102, and the light transmissivity of the material of the first filter layer 104 is larger than the light transmissivity 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 an 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). By way of 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 this order.

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

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

Fig. 2 is a schematic structural diagram of another touch display panel according to an embodiment of the present application. 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 103a. The first filter trace 1041 of the first filter layer 104 may be electrically connected to the first touch trace 1021 of the first touch electrode layer 102 through at least one first via 103a.

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 be simultaneously used as the 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 can be larger, and the touch performance of the touch display panel 10 can be ensured.

In an embodiment of the present application, referring to fig. 4, the display substrate 101 may include a substrate 1011, and a plurality of pixels 1012 positioned at one side of the substrate 1011. Only one pixel 1012 is shown in fig. 4. Each pixel 1012 includes a plurality of differently colored subpixels 10121. Alternatively, referring to fig. 4, each pixel 1012 includes a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel. The first color, the second color and the third color 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 area where each sub-pixel can emit light may be a light emitting area. 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 light emitting regions b included in the display substrate 101 may be the same as the number of 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 schematic partial view of another touch display panel according to an embodiment of the 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 front projection of the filter 1042 on the display substrate 101 covers the corresponding light emitting region b. For example, the light emitting areas b are in one-to-one correspondence with the light filters 1042, and the front projection of each light filter 1042 on the display substrate 101 covers a corresponding light emitting area b.

Alternatively, each of the optical filters 1042 may be in a floating state, where the floating state may mean that the optical filters 1042 are insulated from each other, and each of the optical filters 1042 is insulated from any of the first optical filter wirings 1041. In which three light emitting areas b are shown in fig. 5, three filters 1042 are correspondingly shown.

Since the display substrate 101 may further include driving wires for driving the sub-pixels to emit light, the front projection of the driving wires on the substrate 1011 may be located in the light emitting region b of the display substrate 101, and thus the driving wires may reflect the external ambient light. Therefore, the light-emitting region b is covered with the optical filter 1042, which can reduce the external ambient light reflected by the driving trace of the light-emitting region b, and avoid the influence of the driving trace on the display effect of the touch display panel 10. The driving wire may be a gate (gate) signal line or a data (data) signal line.

The color of the light that can be transmitted through the filter 1042 may correspond to the color of the subpixel to which the light-emitting region covered by the filter 1042 belongs. For example, the color of the light that can be transmitted by the filter 1042 covering the light emitting region of the red subpixel is red.

Alternatively, referring to fig. 4, each sub-pixel 10121 of 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, an emission layer (EM) a2, and a cathode layer (cathode) a3 along a distance from the substrate 101.

Wherein the cathode layer of all sub-pixels in the display substrate 101 may be common. 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. Thus, the cathode layer of the display substrate 101 can be prevented from greatly influencing the light transmittance of the touch display panel 10, and 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 common, 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 generally 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, each of which 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 on 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 schematic partial view of another touch display panel according to an embodiment of the disclosure. Fig. 9 is a schematic view of fig. 6 at a region a. Referring to fig. 8 and 9, the front 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 front projection of the first electrode trace 1021 on the display substrate 101 may be located at a gap of the light emitting region b of the adjacent sub-pixel 10121 in the pixel, and the front projection of the first electrode trace 1021 on the display substrate 101 does not overlap with the light emitting region b.

Accordingly, fig. 10 is a schematic partial view of a first optical filter according to an embodiment of the present application. Referring to fig. 8 and 10, the arrangement position of the first filter trace 1041 in the first filter layer 104 may correspond to the arrangement position of the first electrode trace 1021 in the first touch electrode layer 102. Thus, referring to fig. 9, the front projection of the first filter trace 1041 in the first filter layer 104 on the display substrate 101 may be located around the pixel 1012 or inside the pixel 1012. For example, the front projection of the first filter trace 1041 on the display substrate 101 may be located at a gap of the light emitting region b of the adjacent sub-pixel 10121 in the pixel, and the front projection of the first filter trace 1041 on the display substrate 101 does not overlap with the light emitting region b.

As an alternative implementation, referring to fig. 11, the first touch electrode layer 102 includes: a plurality of first touch electrodes c1 arranged along the first direction X, a plurality of second touch electrodes c2 arranged along the second direction Y, a plurality of first signal sub-traces c3 and a plurality of second signal sub-traces c4. Also, referring to fig. 12, the touch display panel 10 may further include a second insulating layer 105, the second insulating layer 105 having a plurality of second vias. 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 may 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 c22. For example, each of the second touch electrodes c2 includes a plurality of touch sub-electrodes c21 and at least one connection portion c22.

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

Optionally, the positioning of the plurality of touch sub-electrodes c21 and the plurality of first touch electrodes c1 on the same layer may refer to: the plurality of touch sub-electrodes c21 and the plurality of first touch electrodes c1 may be prepared based on the same material and using the same patterning process.

Each connecting portion c22 is electrically connected with two adjacent touch sub-electrodes c21 through at least two second through holes, so as to realize connection of the two adjacent touch sub-electrodes c 21. In addition, each second signal sub-trace c4 may be connected to one touch sub-electrode c21, so as to provide a touch signal for 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 may be a sensing electrode, and the second touch electrode c2 may be a driving electrode. The embodiments of the present application are not limited in this regard. The first touch electrode layer 102 may further include a floating electrode, which 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.

Referring to fig. 12, it can be further seen that the display substrate 101 in the touch display panel 10 may further include: the encapsulation layer 1014 and the first planarization layer 1015. The encapsulation layer 1014 is used to encapsulate the side of the substrate 1011 on which the sub-pixels 102 are disposed, and the first planarization layer 1015 is used 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 region B in fig. 11. Referring to fig. 13, the first touch electrode c1 may include a plurality of first touch sub-wires c11, and the plurality of first touch sub-wires c11 may be arranged in a grid shape. The touch sub-electrode c21 of the second touch electrode c2 includes a plurality of second touch sub-wires c211, and the plurality of second touch sub-wires c211 may be arranged in a grid shape. In fig. 13, the connection portion c22 of the second touch electrode c2 is not shown.

In the embodiment of the present application, the plurality of first touch sub-traces c11, the plurality of second touch sub-traces c211, the plurality of first signal sub-traces c3 and the plurality of second signal sub-traces c4 may form a plurality of first electrode traces 1021 of the first touch electrode layer 102. That is, in this implementation, 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 that are located on the same layer. The first touch sub-wires c11 and the second touch sub-wires c211 are insulated from each other.

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

Fig. 14 is a schematic partial view of another first filter layer according to an embodiment of the disclosure. 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 14, in the position where the first electrode trace 1021 in the first touch electrode layer 102 is disconnected, the first filter trace 1041 in the first filter layer 104 is also disconnected. And the first filter trace 1041 has a break, and the orthographic projection of the break on the display substrate 101 may at least partially overlap with the orthographic projection of the first electrode trace 1021 on the display substrate. Therefore, the area occupied by the first filtering wires 1041 electrically connected with each other can be prevented from being larger, the accurate identification of the two contacts which are closer to each other 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 the touch display panel 10 has at least one break 1041a per unit area. And the two first filter wires 1041 separated by the break 1041a are not communicated. For example, the unit area may be 0.1 square millimeters (mm) ² )。

Fig. 15 is a sectional view of fig. 9 along the CC direction. If the first electrode trace 1021 shown in fig. 9 is the first touch sub-trace c11, the first filter trace 1041 shown in fig. 15 may be the first filter sub-trace. Thus, referring to fig. 15, the first filtered sub-trace may be electrically connected to the first touch sub-trace c11, i.e., the signal transmitted in the first filtered 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 portion 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 made larger 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 may be located at the gap of the light emitting region of the sub-pixel, the line width of the first filter sub-trace may be smaller than the width of the gap between two adjacent light emitting regions. By way of example, the linewidth of the first filtered sub-trace may range from 3 microns to 20 microns.

If the first electrode trace 1021 in fig. 15 is the second touch sub-trace c211, the first filter trace 1041 in fig. 15 may be the second filter sub-trace. Thus, referring to fig. 15, the second filtered sub-trace may be electrically connected to the second touch sub-trace c211, i.e., the signal transmitted in the second filtered 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 filtered 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 filtered sub-trace may be made larger 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 may be located at the gap of the light emitting region of the sub-pixel, the line width of the second filter sub-trace may be smaller than the width of the gap between the adjacent two light emitting regions. By way of example, the linewidth of the second filtered sub-trace may range from 3 microns to 20 microns.

Fig. 16 is a cross-sectional view of fig. 11 along DD direction. Referring to fig. 16, the third filtered sub-trace 1041 may be electrically connected with the first signal sub-trace c3, i.e., the signal transmitted in the third filtered 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 filtered sub-trace 1041 may be electrically connected to the second signal sub-trace c4, i.e., the signal transmitted in the fourth filtered sub-trace 1041 may be the same as the signal transmitted in the second signal sub-trace c 4.

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

In an embodiment of the present application, referring to fig. 15 to 17, the first touch electrode layer 102 may further include: a plurality of first connection sub-wires d1, a plurality of second connection sub-wires d2, a plurality of third connection sub-wires d3, and a plurality of fourth connection sub-wires d4, which are insulated from each other and located at the same layer as the plurality of connection portions c 22.

The first connection sub-wires d1 may be in one-to-one correspondence with the first touch sub-wires c11, the second connection sub-wires d2 may be in one-to-one correspondence with the second touch sub-wires c211, the third connection sub-wires d3 may be in one-to-one correspondence with the first signal sub-wires c3, and the fourth connection sub-wires d4 may be in one-to-one correspondence with the second signal sub-wires c 4.

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

The line width of the first connection 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 connection sub-trace d1 may be different from the line width of the first touch sub-trace c 11. In addition, when the line width of the first connection sub-trace d1 is different from the line width of the first touch sub-trace c11, the line width of the first connection sub-trace d1 needs to be smaller than the line width of the first filter sub-trace, so as to ensure that at least part of the orthographic projection of the first connection sub-trace d1 on the display substrate 101 is covered by the orthographic projection of the first filter sub-trace on the display substrate 101, and avoid the influence of the first connection 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 connection sub-trace in fig. 15 may be the second connection sub-trace d2. Referring to fig. 15, the plurality of second connection sub-traces d2 and the plurality of second touch sub-traces c211 may be electrically connected through a plurality of sixth vias of the second insulating layer 105.

The line width of the second connection sub-trace d2 may be the same as the line width of the second touch sub-trace c211, or the line width of the second connection sub-trace d2 may be different from the line width of the second touch sub-trace c 211. In addition, when the line width of the second connection sub-trace d2 is different from the line width of the second touch sub-trace c211, the line width of the second connection sub-trace d2 needs to be smaller than the line width of the second filtered sub-trace, so as to ensure that at least part of the orthographic projection of the second connection sub-trace d2 on the display substrate 101 is covered by the orthographic projection of the second filtered sub-trace on the display substrate 101, and avoid the influence of the second connection 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 a plurality of seventh vias provided in the second insulating layer 105. The line width of the third connection 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 connection sub-trace d3 may be different from the line width of the first signal sub-trace c 3. In addition, when the line width of the third connection sub-trace d3 is different from the line width of the first signal sub-trace c3, the line width of the third connection sub-trace d3 needs to be smaller than the line width of the third filtered sub-trace, so as to ensure that at least part of the orthographic projection of the third connection sub-trace d3 on the display substrate 101 is covered by the orthographic projection of the third filtered sub-trace on the display substrate 101, and avoid the influence of the third connection 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 connection 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 connection sub-trace d4 may be different from the line width of the second signal sub-trace c 4. In addition, when the line width of the fourth connection sub-trace d4 is different from the line width of the second signal sub-trace c4, the line width of the fourth connection sub-trace d4 needs to be smaller than the line width of the fourth filtered sub-trace, so as to ensure that at least part of the orthographic projection of the fourth connection sub-trace d4 on the display substrate 101 is covered by the orthographic projection of the fourth filtered sub-trace on the display substrate 101, and avoid the influence of the fourth connection 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 detection circuit electrically connected to the second signal sub-trace c 4. The driving circuit is used for providing a signal for the first signal sub-wiring c3, and the detecting circuit is used for determining the touch position of the touch display panel 10 according to the change of the sensing amount of the signal received from the second signal sub-wiring c4 so as to realize the touch function of the touch display panel 10.

As another alternative implementation, referring to fig. 18, the first touch electrode layer 102 may include: the touch electrode patterns e1 are arranged at intervals, and the signal sub-wirings e2 are electrically connected with the 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 e22. Alternatively, the first pattern e11 may be electrically connected to the first sub-trace e21 and located at the same layer, and the second pattern e12 may be electrically connected to the second sub-trace e22 and located at the same layer.

In this embodiment, for each touch electrode pattern e1, the shape of the front 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 front projection of the second pattern e12 on the display substrate 101, and the front projection of the first pattern e11 on the display substrate 101 may overlap with the front 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. Also, 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 FF direction. 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 and second sub-wirings e21 and e22 may be located at both sides of the second insulating layer 105, respectively, and the first and second sub-wirings e21 and e22 may be electrically connected through at least one fourth via hole. In which 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 may be interchanged, which is not limited in the embodiment of the present application.

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 hole.

Since the first pattern e11 and the second pattern e12 are electrically connected, the first sub-trace e21 and the second sub-trace e22 are electrically connected, and the first pattern e11 and the first sub-trace e21 are electrically connected, and the second pattern e12 and the second sub-trace e22 are electrically connected, the first pattern e11, the second pattern e12, the first sub-trace e21 and the second sub-trace e22 can 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 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 larger, and the touch performance of the touch display panel 10 can be ensured.

Fig. 20 is a schematic view of a first pattern according to an embodiment of the present application. As can be seen with reference to fig. 20, the first pattern e11 may include a plurality of third touch sub-traces e111. Moreover, the plurality of third touch sub-traces e111 included in the first pattern e11 may be arranged in a grid shape.

In addition, the second pattern e12 may include a plurality of fourth touch sub-traces e112. Since the shape of the second pattern e12 may be the same as the shape 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 may be obtained, and in this embodiment of the present application, the second pattern e12 is not separately illustrated. The plurality of fourth touch sub-traces e112 included in the second pattern e12 may be arranged in a grid shape.

In the embodiment of the present application, the third touch sub-wires e111, the fourth touch sub-wires e112, and the signal sub-wires e2 may form the first electrode wires 1021 of the first touch electrode layer 102. That is, in this implementation, 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 e2.

Optionally, the plurality of first filter traces 1041 of the first filter layer 104 may include: a plurality of fifth filtered-light sub-traces and a plurality of sixth filtered-light sub-traces. Among the plurality of first filter wires 1041, at least a portion of the first filter wires 1041 covering the third touch sub-wire e111 (or the fourth touch sub-wire e 112) is a fifth filter sub-wire, and at least a portion of the first filter wires 1041 covering the signal sub-wire e2 is a sixth filter sub-wire.

Fig. 21 is a schematic partial view of another first filter layer according to an embodiment of the disclosure. 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. Referring to fig. 20 and 21, the first electrode trace 1021 in the first touch electrode layer 102 is not disconnected, the first filter trace 1041 has a break 1041a, and the front projection of the break 1041a on the display substrate 101 may at least partially overlap with the front projection of the first electrode trace 1021 on the display substrate 101. Therefore, the area occupied by the first filtering wires 1041 electrically connected with each other can be prevented from being larger, the accurate identification of the two contacts which are closer to each other by the touch display panel 10 is ensured, and the touch performance of the touch display panel 10 is ensured.

Fig. 22 is a sectional view of fig. 20 along the GG direction. The first filter trace 1041 in fig. 22 may be a fifth filter sub-trace. The fifth filtered sub-trace may be electrically connected to the third and fourth touch sub-traces e111 and e112, i.e., the signals transmitted in the fifth filtered sub-trace may be the same as the signals transmitted in the third and fourth touch sub-traces e111 and e 112. And the first filter trace 1041 in fig. 19 is a sixth filter sub-trace. The sixth filter sub-trace may be electrically connected to the first sub-trace e21 and the second sub-trace e22, i.e. the signals transmitted in the sixth filter sub-trace may be identical to 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 filtered sub-trace on the display substrate 101 to cover at least a portion of the orthographic projection of the third touch sub-trace e111 on the display substrate 101 and to cover at least a portion of the orthographic projection of the fourth touch sub-trace e112 on the display substrate 101, the line width of the fifth filtered sub-trace may be made 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. Moreover, in order to enable the orthographic projection of the sixth filtered sub-trace on the display substrate 101 to cover at least a portion of the orthographic projection of the first sub-trace e21 on the display substrate 101 and to cover at least a portion of the orthographic projection of the second sub-trace e22 on the display substrate 101, the line width of the sixth filtered sub-trace may be made larger than the line width of the first sub-trace e21 and larger than the line width of the second sub-trace e 22.

In this embodiment, 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 all electrically connected, so that the first touch electrode layer 102 and the first filter layer 104 can be used as touch electrodes of the touch display panel 10 at the same time. Thus, the sensing variation of the touch display panel 10 can be large, and the touch performance of the touch display panel 10 is ensured.

Optionally, in this implementation, the touch display panel 10 may further include a driving circuit electrically connected to the signal sub-trace e2, and a detection circuit electrically connected to the touch electrode pattern e 1. The driving circuit is used for providing signals for the signal sub-wiring e2, and the detection circuit is used for determining the touch position of the touch display panel 10 according to the induction quantity change between the touch electrode pattern e1 and the obstacle so as to realize the 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, 15 to 17, 19 and 22, the touch display panel 10 may further include: a second flat 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 107 is located on a side of the second planarization layer 106 away from the display substrate 101.

Wherein the first cover 107 may be bonded to the second flat layer 106 by an optical adhesive. The second planarization layer 106 is used for planarizing a side of the touch display panel 10 where the display substrate 101 is provided with the first touch electrode layer 102, and the first cover 107 is used for packaging the touch display panel 10 to avoid film damage in the touch display panel 10.

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: the second touch electrode layer 108, the third insulating layer 109 and the second filter layer 110. The second touch electrode layer 108 may be located at the other side of the display substrate 101, the third insulating layer 109 may be located at a side of the second touch electrode layer 108 away from the display substrate 101, and the second filter layer 110 is located at a 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 wires are in one-to-one correspondence with the plurality of second filter wires. The orthographic projection of the 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. For example, the orthographic projection of each second filter trace on the display substrate covers at least a portion of the orthographic projection of the corresponding second electrode trace on the display substrate.

The light reflectivity of the second filter layer 110 is smaller than the light reflectivity of the second touch electrode layer 108, the light transmittance of the second filter layer 110 is larger than the light transmittance of the second touch electrode layer 108, and the light absorptivity of the second filter layer 110 is larger 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. The details of the second touch electrode layer 108, the third insulating layer 109 and the second filter layer 110 will not be described in detail, the specific content of the second touch electrode layer 108 may refer to the related content of the first touch electrode layer 102, the specific content of the third insulating layer 109 may refer to the related content of the first insulating layer 103, and the specific content of the second filter layer 110 may refer to the related content of the first filter layer 104.

The touch display panel 10 of the embodiment of the present application can make both sides of the touch display panel 10 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 at a side of the second filter layer 112 away from the second touch electrode layer 108, and the second cover 113 may be located at a side of the fourth flat layer 112 away from the second touch electrode layer 108. The second cover plate 113 may be adhered to the fourth flat layer 112 by an optical adhesive.

Fig. 24 is a flowchart of a method for manufacturing a touch display panel according to an embodiment of the present application. The method may be used to prepare the touch display panel 10 provided in 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 wires.

In step 203, a first insulating layer is formed on a side of the first touch electrode layer away from the display substrate.

Step 204, forming a first filter layer on a 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 application provides a method for manufacturing a touch display panel, where a first filter layer is disposed on a side of a first touch electrode layer of the touch display panel, which is far away from a display substrate. Because the first electrode wiring of the first touch electrode layer of the touch display panel is at least partially covered by the first light filtering wiring in the first light filtering layer, and the light reflectivity of the first light filtering layer is smaller, and the light transmittance and the light absorptivity are larger, the first light filtering layer can absorb more external environment light and light reflected by the first touch electrode layer after being transmitted by the first light filtering layer, so that 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 application. The method may be used to prepare 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 illustration. 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, for example, polyimide (PI).

Step 302, forming anode layers of a plurality of sub-pixels on one side of a substrate.

In the embodiment of the present application, after the substrate 1011 is obtained, an anode thin film may be formed on one side of the substrate 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 reserved between the anode layers of any two adjacent sub-pixels. The patterning process may include: photoresist coating, exposure, development, etching, and photoresist removal. The patterning process may also be referred to as a lithographic 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 forming the anode layers of the plurality of sub-pixels, the pixel defining thin film may be formed on a side of the anode layers of the plurality of sub-pixels remote from the substrate 101. And then, processing the pixel definition film by adopting a patterning processing technology to obtain a pixel definition layer. The pixel defining layer has a plurality of openings therein, each opening exposing the anode layer of one of the sub-pixels.

Optionally, different masks are used for patterning different films. That is, the mask used in the patterning process for the pixel defining film is different from the mask used in the patterning process for the anode film.

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

In the embodiment of the 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 substrate. And then, processing the luminescent film by adopting a patterning processing technology to obtain luminescent layers of a plurality of sub-pixels. Wherein the light emitting layer of each sub-pixel may be located within an opening of the pixel defining layer, in contact with the anode layer exposed by the opening.

In step 305, a cathode layer of the plurality of sub-pixels is formed on a side of the light emitting layer of the plurality of sub-pixels away from the substrate.

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

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

Step 306, forming a packaging layer and a first planarization layer on a side of the cathode layer of the plurality of sub-pixels away from the substrate.

In the embodiment of the 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.

Step 307, forming a connection portion on a side of the first planarization layer away from the substrate.

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

Step 308, forming a second insulating layer on a side of the connection portion away from the substrate.

In the embodiment of the application, the second insulating layer may be prepared by at least one of a vapor deposition process and a spin coating 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 connection portions.

In step 309, 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 are formed on a side of the second insulating layer away from the substrate.

In this embodiment of the present application, a touch film may be formed on a side of the second insulating layer away from the substrate, where the side is away from the substrate, and a patterning process is used to process the touch film, so as 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 prepared 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 parts 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 along the second direction may be configured. In addition, the plurality of first touch electrodes are arranged along the first direction. And each first signal sub-wire can be electrically connected with one first touch electrode to provide signals for the first touch electrode. Each second signal sub-wire can be electrically connected with one touch sub-electrode to provide signals for the touch sub-electrode.

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

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

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

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

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

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

In the embodiment of the application, the second flat 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 flat layer by an optical adhesive.

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 insulating layer 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 by the above embodiments. The power supply assembly 40 may be used to power the touch display panel 10.

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

Optionally, the display device may be any product or component with 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 foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention.

Claims

1. A touch display panel, the touch display panel comprising:

a display substrate;

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

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

4. A 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 and the corresponding first electrode trace are electrically connected through the at least one first via hole.

5. A touch display panel according to any one of claims 1 to 3, wherein at least one of the first filter tracks has a break, and the orthographic projection of the break on the display substrate at least partially overlaps the orthographic projection of the first electrode track on the display substrate.

6. The touch display panel of claim 5, wherein the first filter trace in a unit area of the touch display panel has at least one of the discontinuities, the unit area being 0.1 square millimeters.

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

8. A touch display panel according to any one of claims 1 to 3, wherein the first touch electrode layer comprises: a plurality of first touch electrodes arranged along a first direction, a plurality of second touch electrodes arranged along a second direction, a plurality of first signal sub-wires and a plurality of second signal sub-wires; 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 of claim 8, wherein the first touch electrode comprises a plurality of first touch sub-traces, and the plurality of first touch sub-traces are arranged in a grid shape;

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

11. The touch display panel of claim 10, wherein the touch display panel comprises,

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

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

13. The touch display panel of claim 12, wherein the first pattern comprises a plurality of third touch sub-traces, the plurality of third touch sub-traces being arranged in a grid;

14. A touch display panel according to any one of claims 1 to 3, further comprising: the second touch electrode layer, the third insulating layer and the 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;