Patent ID: 12254149

DETAILED DESCRIPTION OF THE EMBODIMENTS

In the related art, one of commonly used touch schemes for display screens is to embed a touch screen between a color filter and a polarizer of the display screen, commonly known as an on cell touch scheme in the art.

FIG.1is a cross-sectional view of a structure of an on cell touch display module in the related art. As shown inFIG.1, the touch display module includes a display panel101, a light filter102, a touch screen103, a polarizer104, and a cover plate105sequentially stacked.

The touch screen103may be a self capacitive touch screen or a mutual capacitive touch screen. The mutual capacitive touch screen is widely used due to advantages including true multi-touch and fast speed.FIG.2is a top view of a structure of a mutual capacitive touch screen in the related art. As shown inFIG.2, the touch screen103includes a first touch electrode141and a second touch electrode142intersected with the first touch electrode141. The first touch electrode141and the second touch electrode142are insulated from each other at an intersection position.

Specifically, a cross-sectional line A1A2shown inFIG.2corresponds to the cross-sectional structure shown inFIG.1. As shown inFIG.1andFIG.2, the touch screen103includes a first metal layer M1, an insulation layer Ins, a second metal layer M2, and an insulation adhesive layer OC sequentially stacked. At the intersection position, a bridge portion of the second touch electrode142is located in the first metal layer M1, and the second touch electrode142except for the bridge portion and the first touch electrode141are located in the second metal layer M2. The insulation layer Ins is used for insulating the first touch electrode141from the second touch electrode142at the intersection position.

In a preparation process of the touch screen103, a manufacturing procedure of each of the four film layers included in the touch screen103, namely the first metal layer M1, insulation layer Ins, second metal layer M2, and insulation adhesive layer OC, requires a patterning process. In other words, the preparation process of the touch screen requires four masks, resulting in a high cost. Meanwhile, a thickness of the touch display module is increased as a result of integration of the touch screen103, which is not conducive to thinning of a product.

In view of this, embodiments according to the present disclosure provides a touch display panel and a manufacturing method therefor, and a display apparatus. The first touch electrode131and the second touch electrode132are disposed inside the display panel, and a film layer inside the display panel is utilized to function as the insulation layer Ins and the insulation adhesive layer OC, so that an in cell touch scheme is achieved. In this case, on the one hand, the four masks required for the touch screen are saved, thereby reducing costs; and on the other hand, a thickness of the display module is reduced.

Technical solutions in embodiments of the present disclosure will be clearly and completely described with reference to accompanying drawings corresponding to the embodiments of the present disclosure in the following description. Apparently, the described embodiments are only some, not all, embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present disclosure.

Furthermore, in order to better illustrate the present disclosure, numerous specific details are provided in the following specific embodiments. Those skilled in the art should understand that without certain specific details, the present disclosure may also be implemented. In some embodiments, methods and means familiar to those skilled in the art are not described in detail to highlight the main idea of the present disclosure.

It should be noted that similar labels and letters represent similar terms in the following figures. Therefore, once a term is defined in an accompanying drawing, it does not need to be further defined or explained in subsequent accompanying drawings. In addition, if terms such as “first” and “second” appear, the terms are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

FIG.3is a partial top view of a structure of a touch display panel according to an embodiment of the present disclosure.FIG.4is a partially enlarged view ofFIG.3.FIG.5ais a first cross-sectional view of a structure shown inFIG.4along line B1B2. As shown inFIG.3,FIG.4andFIG.5a, a touch display panel includes a substrate11, an isolation structure layer12, a plurality of light-emitting devices13, and a touch electrode14.

Therein, the substrate11may be a base substrate, or an array substrate. The array substrate includes a base substrate and a pixel circuit integrated on the base substrate. The base substrate may be a flexible substrate, such as a polyimide film, an ultra-thin glass; or a hard substrate, such as a glass substrate.

The isolation structure layer12is located on a side of the substrate11, and a plurality of isolation openings are formed in the isolation structure layer12. The isolation structure layer12is configured to isolate the plurality of light-emitting devices13, so that the light-emitting device13is independent from each other.

Patents including No. PCT/CN2023/134518, No. 202310759370.2, No. 202310740412.8, No. 202310707209.0, and No. 202311346196.5 describe related technical solutions of the isolation structure layer, and the contents thereof are incorporated herein by reference for reference purposes.

The plurality of light-emitting devices13are located in the plurality of isolation openings. The light-emitting device13includes a first electrode131facing the substrate11. Exemplarily, the first electrode131includes an anode. The light-emitting device13further includes a second electrode133facing away from the substrate11, and a light-emitting layer132located between the second electrode133and the first electrode131. The second electrode133is located on a side, facing away from the substrate11, of the first electrode131. In other words, in a direction gradually away from the substrate11, the first electrode131, the light-emitting layer132, and the second electrode133are sequentially stacked.

It should be noted thatFIG.3only exemplarily shows some of the light-emitting devices13in the touch display panel, and in an actual product, the light-emitting devices13are distributed fully in a coverage area of the touch electrode14.

An orthographic projection of the touch electrode14on the substrate11is located in an interval area between orthographic projections of the plurality of light-emitting devices13on the substrate11. Specifically, the touch electrode14includes a first touch electrode141and a second touch electrode142, and the second touch electrode142includes a plurality of main body portions1421and a bridge portion1422(exemplarily, a wire segment AB as shown inFIG.4). The first touch electrode141extends in a second direction y parallel to the substrate11. The plurality of main body portions1421are sequentially arranged in a first direction x parallel to the substrate11, and the first direction x intersects with the second direction y. Exemplarily, the first direction x is perpendicular to the second direction y. The main body portion1421and the bridge portion1422are disposed in different layers. Main body portions1421adjacent in the first direction are in contact with the bridge portion1422by a through hole. An orthographic projection of the bridge portion1422on the substrate11intersects with an orthographic projection of the first touch electrode141on the substrate11.

Specifically, as shown inFIG.5a, a shape of an orthographic projection of the touch electrode14(including the first touch electrode141and the second touch electrode142) on the substrate11is a mesh defined with a plurality of grids. Shapes of the grids may be the same or different. Each grid surrounds an orthographic projection of at least one light-emitting device13on the substrate11. Quantities of the light-emitting devices13surrounded by different grids are equal or unequal.

In a case where each grid surrounds orthographic projections of a plurality of light-emitting devices13on the substrate11, as shown inFIG.5a, an orthographic projection of a part of the isolation structure layer12on the substrate11covers the orthographic projection of the touch electrode14on the substrate11, and an orthographic projection of a remaining part of the isolation structure layer12on the substrate11falls to cover the orthographic projection of the touch electrode14on the substrate11.

FIG.5bis a partially enlarged view of a touch display panel according to another embodiment of the present disclosure.FIG.5cis a cross-sectional view of a structure shown inFIG.5balong line D1D2. As shown inFIG.5bandFIG.5c, in a case where each grid surrounds an orthographic projection of a light-emitting device13on the substrate11, the orthographic projection of the isolation structure layer12at any position on the substrate11covers the orthographic projection of the touch electrode14on the substrate11.

In an embodiment, as shown inFIG.3andFIG.4, each grid of the touch electrode14surrounds orthographic projections of a plurality of light-emitting devices13on the substrate11, and the plurality of light-emitting devices13surrounded by the same grid constitute a repeat unit of pixel arrangement. The repeat unit of pixel arrangement refers to a minimum repeat unit in a pixel array layout. The pixel mentioned here is equivalent to the light-emitting device13, that is, the light-emitting device13may also be referred to as a pixel. Exemplarily, as shown inFIG.5b, the repeat unit of pixel arrangement includes a red light-emitting device R, a green light-emitting device G, and a blue light-emitting device B.

The bridge portion1422includes at least one wire, and the wire extends in the first direction x. In a case where the bridge portion1422includes a plurality of wires, the plurality of wires are sequentially arranged in the second direction y. The plurality of wires are used to form the bridge portion1422, so that the bridge portion1422is more reliable than a single wire.

FIG.6is a top view of a conductive layer where a first electrode is located in the structure shown inFIG.5a. As shown inFIG.5aandFIG.6, in the embodiment, the first touch electrode141and the main body portion1421are disposed in a same layer as the first electrode131. The bridge portion1422is disposed in a same layer as the isolation structure layer12.

Specifically, a shape of the first touch electrode141and a shape of the main body portions1421are mesh defined with a plurality of grids, and each grid surrounds at least one of the first electrodes131.

The isolation structure layer12includes a first surface S1facing the substrate11and a second surface S2facing away from the substrate1. An orthographic projection of the first surface S1on the substrate11is within an orthographic projection range of the second surface S2on the substrate11. Exemplarily, a cross-sectional shape of the isolation structure layer12may be an inverted trapezoid or similar to an I-shape.

The isolation structure layer12includes a conductive portion121and a brim portion122stacked in sequence, and the conductive portion121is located on a side, close to the substrate11, of the brim portion122. The light-emitting device13further includes a second electrode133facing away from the substrate11. The second electrode133is connected to the conductive portion121by means of lap joint. The light-emitting device13further includes a light-emitting layer132located between the first electrode131and the second electrode133. Exemplarily, the conductive portion121may be designed as an independent film layer, that is, no physical interface exists inside the conductive portion121, and a material of each part of the conductive portion121is the same. Alternatively, the conductive portion121may be designed to include at least two film layers stacked together. Exemplarily, the conductive portion121is formed by stacked two conductive film layers. Materials of the two conductive film layers may be molybdenum and aluminum, respectively, and a conductive film layer including molybdenum is located between the substrate11and a conductive film layer including aluminum. An orthographic projection of the brim portion122on the substrate11covers an orthographic projection of the conductive portion121on the substrate11. A material of the brim portion122may be an organic material, an inorganic material or a metal material. In a case where the material of the brim portion122is a metal material, the material of the brim portion122may be titanium.

A part of the isolation structure layer12may include at least one through hole M. Exemplarily, the through hole M may be a strip-shaped through hole. The bridge portion1422is located in the through hole M and spaced apart from the isolation structure layer12. In an embodiment, the touch display panel may further include an insulating portion (not shown in the figures), and the insulating portion is filled in an interval area between the isolation structure layer12and the bridge portion1422, so as to avoid short circuit between the bridge portion1422and the conductive portion121.

In an embodiment, the touch display panel may further include a pixel defining layer17located on a side, facing the substrate11, of the isolation structure layer12. An orthographic projection of the isolation structure layer12on the substrate11is within an orthographic projection of the pixel defining layer17on the substrate11. A plurality of pixel openings are formed in the pixel defining layer17. The light-emitting device13is further located in the pixel opening, and the bridge portion1422is in contact with the main body portion1421by a through hole T penetrating through the pixel defining layer17.

According to the touch display panel provided by the embodiment, the first touch electrode141and the main body portion1421of the second touch electrode142are disposed in the same layer as the first electrode131of the light-emitting device13, and the bridge portion1422is disposed in the isolation structure layer12, so that an in-cell touch scheme is achieved. In this case, on the one hand, there is no need to additionally prepare a touch screen, thereby saving four masks required by the touch screen, and reducing costs; and on the other hand, a thickness of the touch display module may be reduced.

In an embodiment, as shown inFIG.5a, the touch display panel may further include a plurality of inorganic encapsulation units151. The plurality of inorganic encapsulation units151and the plurality of isolation openings are in one-to-one correspondence, and orthographic projections of the plurality of inorganic encapsulation units151on the substrate11cover orthographic projections of the plurality of isolation openings on the substrate11.

In an embodiment, the touch display panel may further include an organic encapsulation layer and an inorganic encapsulation layer (not shown in the figure) sequentially stacked on a side, facing away from the substrate11, of the inorganic encapsulation unit151. An orthographic projection of the organic encapsulation layer on the substrate11covers the orthographic projection of the inorganic encapsulation unit151on the substrate11, and the organic encapsulation layer fills an interval area between the bridge portion1422and the isolation structure layer12. An orthographic projection of the inorganic encapsulation layer on the substrate11covers the orthographic projection of the organic encapsulation layer on the substrate11. Thus, the inorganic film layer and the organic film layer are alternatively stacked to form a thin film encapsulation structure with a good encapsulation effect.

FIG.7a second cross-sectional view of a structure shown inFIG.4along line B1B2. As shown inFIG.7, a difference between a touch display panel provided by the present embodiment and the touch display panel shown inFIG.5alies in that a position of the bridge portion1422is different.

Specifically, as shown inFIG.7, in the embodiment, the substrate11includes at least one conductive layer, and the bridge portion1422is located in one conductive layer. Exemplarily, the at least one conductive layer includes an adjacent conductive layer16closest to the isolation structure layer12, and the bridge portion1422is located in the adjacent conductive layer16. With the bridge portion1422being located in the adjacent conductive layer16, a distance between the adjacent conductive layer16and the bridge portion1422is closer than that when the bridge portion1422is located in the other conductive layers in the substrate11, thereby facilitating electrical connection.

It should be noted that other conductive structures in the adjacent conductive layer16are not shown. Exemplarily, the adjacent conductive layer16is located on a side, away from the isolation structure layer12, of the main body portion1421. The adjacent conductive layer16may further include a data signal wire, a scan signal wire, an initialization signal wire, a power signal wire, and the like. Meanwhile, the bridge portion1422may also be disposed in a conductive layer other than the adjacent conductive layer16, and is located on a same conductive layer as at least one of the data signal wire, the scan signal wire, the initialization signal wire, and the power signal wire.

FIG.8is a third cross-sectional view of a structure shown inFIG.4along line B1B2.FIG.9is a top view of a conductive layer where a first electrode is located in the structure shown inFIG.8. A difference between the touch display panel shown inFIG.8andFIG.9and the touch display panel shown inFIG.5aandFIG.6lies in that in combination withFIG.3,FIG.8andFIG.9, in the embodiment, the first touch electrode141and the main body portion1421are disposed in a same layer as the isolation structure layer12, and the bridge portion1422and the first electrode131are disposed in a same layer.

Specifically, the bridge portion1422is located between adjacent first electrodes131. Exemplarily, the bridge portion1422includes at least one wire, and the wire is disposed between the adjacent first electrodes131. The wire extends in the first direction x. In a case where the bridge portion1422includes a plurality of wires, the plurality of wires are sequentially arranged in the second direction y.

The isolation structure layer12includes a conductive portion121and an insulating portion. A part of the isolation structure layer12includes a plurality of grid-shaped grooves, and the plurality of grid-shaped grooves penetrate through at least a part of the conductive portion121in a thickness direction. The insulating portion is located between the conductive portion121and the first touch electrode141, and between the conductive portion121and the main body portion1421.

Specifically, the isolation structure layer12includes a first surface S1facing the substrate11and a second surface S2facing away from the substrate11. An orthographic projection of the first surface S1on the substrate11is within an orthographic projection of the second surface S2on the substrate11.

The isolation structure layer12includes a conductive portion121and a brim portion122stacked is sequence, and the brim portion122is located on a side, facing away from to the substrate11, of the conductive portion121. The light-emitting device13further includes a second electrode133facing away from the substrate11, and the second electrode133is connected to the conductive portion121by means of lap joint. Exemplarily, the conductive portion121may be designed as an independent film layer, that is, no physical interface exists inside the conductive portion121, and a material of each part of the conductive portion121is the same. Alternatively, the conductive portion121may be designed to include at least two film layers stacked together. Exemplarily, the conductive portion121is formed by stacked two conductive film layers. Materials of the two conductive film layers may be molybdenum and aluminum, respectively, and a conductive film layer including molybdenum is located between the substrate11and a conductive film layer including aluminum. An orthographic projection of the brim portion122on the substrate11covers an orthographic projection of the conductive portion121on the substrate11. A material of the brim portion122may be an organic material, an inorganic material or a metal material. In a case where the material of the brim portion122is a metal material, the material of the brim portion122may be titanium.

A part of the isolation structure layer12may include at least one through hole M. Exemplarily, the through hole M may be a grid-shaped through hole. The first touch electrode141and the main body portion1421are located in the through hole M and spaced apart from the isolation structure layer12. In an embodiment, the touch display panel may further include an insulating portion (not shown in the figures), and the insulating portion is filled in an interval area between the isolation structure layer12and the first touch electrode141, and an interval area between the isolation structure layer12and the main body portion1421.

In an embodiment, the touch display panel may further include a pixel defining layer17located on a side, facing the substrate11, of the isolation structure layer12. An orthographic projection of the isolation structure layer12on the substrate11is within an orthographic projection of the pixel defining layer17on the substrate11. A plurality of pixel openings are formed in the pixel defining layer17. The light-emitting device13is also located in the pixel opening. The main body portion1421is in contact with the bridge portion1422by a through hole T penetrating through the pixel defining layer17.

According to the touch display panel provided by the embodiment, the first touch electrode141and the main body portion1421of the second touch electrode142are disposed in the isolation structure layer12, and the bridge portion1422of the second touch electrode142and the first electrode131of the light-emitting device13are disposed in a same layer, so that an in-cell touch scheme is achieved. In this case, on the one hand, there is no need to additionally prepare a touch screen, thereby saving four masks required by the touch screen, and reducing costs; and on the other hand, a thickness of the touch display module may be reduced.

FIG.10is a fourth cross-sectional view of a structure shown inFIG.4along line B1B2. A difference between the touch display panel shown inFIG.10and the touch display panel shown inFIG.9andFIG.8lies in that a position of the bridge portion1422is different.

Specifically, as shown inFIG.10, in the embodiment, the substrate11includes at least one conductive layer, and the bridge portion1422is located in one conductive layer. Exemplarily, the at least one conductive layer includes an adjacent conductive layer16closest to the isolation structure layer12, and the bridge portion1422is located in the adjacent conductive layer16. With the bridge portion1422being located in the adjacent conductive layer16, a distance between the adjacent conductive layer16and the bridge portion1422is closer than that when the bridge portion1422is located in the other conductive layers in the substrate11, thereby facilitating electrical connection.

It should be noted that other conductive structures in the adjacent conductive layer16are not shown. Exemplarily, the adjacent conductive layer16may further include a data signal wire, a scan signal wire, an initialization signal wire, a power signal wire, and the like. Meanwhile, the bridge portion1422may also be disposed in a conductive layer other than the adjacent conductive layer16, and is located on a same conductive layer as at least one of the data signal wire, the scan signal wire, the initialization signal wire, and the power signal wire.

Embodiments of the present disclosure further provide a manufacturing method for a touch display panel.FIG.11is a flowchart of a manufacturing method for a touch display panel according to an embodiment of the present disclosure.FIGS.12ato12gare schematic diagrams of intermediate products obtained during a process of the manufacturing method shown inFIG.11. As shown inFIG.11, the manufacturing method for the touch display panel includes the following steps.

Step S1110: synchronously preparing a plurality of first electrodes, a first touch electrode and a plurality of main body portions on a substrate, where the first touch electrode and the main body portion are both located between adjacent first electrodes.

Specifically, a vacuum evaporation process is adopted, so that a conductive material layer is evaporated on the substrate11shown inFIG.12a. The plurality of first electrodes131, the first touch electrode141and the plurality of main body portions1421are obtained through a patterning process performed on the conductive material layer, as shown inFIG.12b.

Exemplarily, the first touch electrode141extends in a second direction y, and the plurality of main body portions1421are sequentially arranged in a first direction x. The first touch electrode141and the plurality of main body portions1421are grid structures, and each grid surrounds at least one first electrode131.

The substrate11may be a base substrate, or an array substrate. The array substrate includes a base substrate and a pixel circuit integrated on the base substrate. The base substrate may be a flexible substrate, such as a polyimide film, an ultra-thin glass; or a hard substrate, such as a glass substrate.

Step S1120: synchronously preparing an isolation structure layer and a bridge portion on the substrate, where an orthographic projection of the isolation structure layer on the substrate covers an orthographic projection of the first touch electrode and orthographic projections of the plurality of main body portions on the substrate respectively, a plurality of isolation openings are formed in the isolation structure layer, and the isolation opening exposes at least a part of the first electrode. With reference toFIG.12c,FIG.12d, andFIG.12e, whereFIG.12dis a partially enlarged view ofFIG.12candFIG.12eis a cross-sectional view of structure shown inFIG.12dalong line C1C2, a part of the isolation structure layer12includes a through hole M. Exemplarily, as shown inFIG.12d, the through hole M is disposed between a point A and a point B. The bridge portion1422is located in the through hole M and spaced apart from the isolation structure layer12. Two ends of the bridge portion1422are electrically connected to adjacent main body portions1421, respectively, and an orthographic projection of the bridge portion1422on the substrate11intersects with an orthographic projection of the first touch electrode141on the substrate11.

Specifically, at least one isolation material layer is prepared on the substrate11, and the at least one isolation material layer is patterned to obtain the isolation structure layer12and the bridge portion1422. Exemplarily, the at least one isolation material layer includes a conductive material layer and an insulating material layer stacked in sequence, and the insulating material layer includes an organic material layer or an inorganic material layer.

In an embodiment, before Step S1120, the method may further include the following step. Step S1115: preparing a pixel defining layer on the substrate, and performing etching on the pixel defining layer to form a through hole. The pixel defining layer17covers the first touch electrode141and the main body portion1421. A plurality of pixel openings are formed in the pixel defining layer17, and the pixel opening exposes at least a part of the first electrode131. The through hole T exposes the main body portion1421. Foe example, the through holes T are provided at a point A and a point B in the pixel defining layer17.

The isolation structure layer12includes a conductive portion121and a brim portion122stacked in sequence, and the brim portion122is located on a side, facing away from to the substrate11, of the conductive portion121. The light-emitting device13further includes a second electrode133facing away from the substrate11. The second electrode133is connected to the conductive portion121by means of lap joint. Exemplarily, the conductive portion121may be designed as an independent film layer, that is, no physical interface exists inside the conductive portion121, and a material of each part of the conductive portion121is the same. Alternatively, the conductive portion121may be designed to include at least two film layers stacked together. For example, the conductive portion121is formed by stacked two conductive film layers. Materials of the two conductive film layers may be molybdenum and aluminum, respectively, and a conductive film layer including molybdenum is located between the substrate11and a conductive film layer including aluminum. An orthographic projection of the brim portion122on the substrate11covers an orthographic projection of the conductive portion121on the substrate11. A material of the brim portion122may be an organic material, an inorganic material or a metal material. In a case where the material of the brim portion122is a metal material, the material of the brim portion122may be titanium.

Referring toFIG.12f, Step S1130: sequentially preparing a light-emitting layer and a second electrode in the isolation opening to obtain the touch display panel.

In an embodiment, as shown inFIG.12g, after Step S1130, the method further includes: preparing a thin film encapsulation structure. Furthermore, the method further includes the following step.

Step S1140: preparing an organic encapsulation layer on a side, facing away from the substrate, of the second electrode, where the organic encapsulation layer fills an interval area between the isolation structure layer and the bridge portion, and an orthographic projection of the organic encapsulation layer on the substrate covers orthographic projections of the second electrode, the isolation structure layer, and the bridge portion on the substrate.

The thin film encapsulation structure includes a plurality of inorganic encapsulation units151, an organic encapsulation layer152, and an inorganic encapsulation layer153stacked in sequence. The plurality of inorganic encapsulation units151and the plurality of isolation openings are in one-to-one correspondence, and an orthographic projection of the inorganic encapsulation unit151on the substrate11covers an orthographic projection of the isolation opening on the substrate11. An orthographic projection of the organic encapsulation layer152on the substrate11covers the orthographic projections of the plurality of inorganic encapsulation units151on the substrate11. And the organic encapsulation layer152is filled in an interval area between the bridge portion1422and the isolation structure layer12. An orthographic projection of the inorganic encapsulation layer153on the substrate11covers the orthographic projection of the organic encapsulation layer152on the substrate11.

It should be noted that the thin film encapsulation structure provided herein is only exemplary, and a quantity and a stacking relationship of the organic encapsulation layer and the inorganic encapsulation layer in the thin film encapsulation structure may be reasonably adjusted according to an actual requirement.

According to the manufacturing method for the touch display panel provided in the embodiment, the first touch electrode141and the main body portion1421of the second touch electrode142are disposed in the same layer as the first electrode131of the light-emitting device13, and the bridge portion1422is disposed in the isolation structure layer12, so that an in-cell touch scheme is achieved. In this case, on the one hand, there is no need to additionally prepare a touch screen, thereby saving four masks required by the touch screen, and reducing costs; and on the other hand, a thickness of the touch display module may be reduced.

FIG.13is a flowchart of a manufacturing method for a touch display panel according to another embodiment of the present disclosure.FIGS.14ato14eare schematic diagrams of intermediate products obtained during a process of the manufacturing method shown in FIG.13. As shown inFIG.13, the manufacturing method for the touch display panel includes the following steps.

Step S1310: synchronously preparing a plurality of first electrodes and a bridge portion on a substrate, where the bridge portion is located between adjacent first electrodes.

Specifically, a vacuum evaporation process is adopted, so that a conductive material layer is evaporated on the substrate11shown inFIG.12a, the plurality of first electrodes131and the bridge portion1422are obtained through a patterning process performed on the conductive material layer, as shown inFIG.14a.

Exemplarily, the bridge portion1422includes at least one wire, and the wire is located between adjacent first electrodes131. The wire extends in a first direction x parallel to the substrate11. In a case that the bridge portion1422includes a plurality of wires, the plurality of wires are sequentially arranged in a second direction y parallel to the substrate11, and the second direction y intersects with the first direction x. For example, the second direction y is perpendicular to the first direction x. In the second direction y, the plurality of wires and the plurality of first electrodes131are alternately arranged.

The substrate11may be a base substrate, or an array substrate. The array substrate includes a base substrate and a pixel circuit integrated on the base substrate. The base substrate may be a flexible substrate, such as a polyimide film, an ultra-thin glass; or a hard substrate, such as a glass substrate.

Step S1320: synchronously preparing an isolation structure layer, a first touch electrode and a plurality of main body portions on the substrate, where an orthographic projection of the isolation structure layer on the substrate covers an orthographic projection of the bridge portion on the substrate, a plurality of isolation openings are formed in the isolation structure layer, and the isolation opening exposes at least a part of the first electrode. With reference toFIG.14bandFIG.14c, whereFIG.14bis a partially enlarged view ofFIG.14a,FIG.14cis a cross-sectional view of the structure shown inFIG.14balong line C1C2, the isolation structure layer12includes a through hole M. For example, the through hole M is a grid-shaped through hole, and the first touch electrode141and the main body portion1421are located in the through hole M and spaced apart from the isolation structure layer12. Adjacent main body portions1421are electrically connected to the bridge portion1422respectively, and an orthographic projection of the bridge portion1422on the substrate11intersects with an orthographic projection of the first touch electrode141on the substrate11.

Specifically, at least one isolation material layer is prepared on the substrate11, and the at least one isolation material layer is patterned to obtain the isolation structure layer12, the first touch electrode141and the plurality of main body portions1421. Exemplarily, the at least one isolation material layer includes a conductive material layer and an insulating material layer stacked in sequence, and the insulating material layer includes an organic material layer or an inorganic material layer.

Exemplarily, a plurality of grooves M include a first groove and other grooves other than the first groove. The first groove extends in the first direction x parallel to the substrate11, and the other grooves are sequentially arranged in the second direction y parallel to the substrate11. The second direction y intersects with the first direction x. The first groove is provided in interval area between adjacent grooves of the other grooves to avoid communication between the first groove and the other grooves.

In an embodiment, before Step S1320, the method further includes Step S1315: preparing a pixel defining layer on the substrate, and performing etching in the pixel defining layer to obtain a through hole. The pixel defining layer17covers the bridge portion1422. A plurality of pixel openings are formed in the pixel defining layer17, and the pixel opening exposes at least a part of the first electrode131. The through hole T exposes the bridge portion1422. For example, the through hole T is provided at a point A and a point B in the pixel defining layer17.

The isolation structure layer12includes a conductive portion121and a brim portion122stacked is sequence, and the brim portion122is located on a side, facing away from to the substrate11, of the conductive portion121. The light-emitting device13further includes a second electrode133facing away from the substrate11, and the second electrode133is connected to the conductive portion121by means of lap joint. Exemplarily, the conductive portion121may be designed as an independent film layer, that is, no physical interface exists inside the conductive portion121, and a material of each part of the conductive portion121is the same. Alternatively, the conductive portion121may be designed to include at least two film layers stacked together. Exemplarily, the conductive portion121is formed by stacked two conductive film layers. Materials of the two conductive film layers may be molybdenum and aluminum, respectively, and a conductive film layer including molybdenum is located between the substrate11and a conductive film layer including aluminum. An orthographic projection of the brim portion122on the substrate11covers an orthographic projection of the conductive portion121on the substrate11. A material of the brim portion122may be an organic material, an inorganic material or a metal material. In a case where the material of the brim portion122is a metal material, the material of the brim portion122may be titanium.

Referring toFIG.14d, Step S1330: sequentially preparing a light-emitting layer and a second electrode in the isolation opening to obtain the touch display panel.

In an embodiment, as shown inFIG.14e, after Step S1330, the method further includes: preparing a thin film encapsulation structure. Furthermore, the method further includes the following step.

Step S1340: preparing an organic encapsulation layer on a side, facing away from the substrate, of the second electrode, where the organic encapsulation layer fills an interval area between the isolation structure layer and the main body portion, and an interval area between the isolation structure layer and the first touch electrode, and an orthographic projection of the organic encapsulation layer on the substrate covers orthographic projections of the second electrode, the isolation structure layer, the first touch electrode, and the plurality of the main body portions on the substrate.

The thin film encapsulation structure includes an inorganic encapsulation unit151, an organic encapsulation layer152, and an inorganic encapsulation layer153stacked in sequence. The plurality of inorganic encapsulation units151and the plurality of isolation openings are in one-to-one correspondence, and an orthographic projection of the inorganic encapsulation unit151on the substrate11covers an orthographic projection of the isolation opening on the substrate11. An orthographic projection of the organic encapsulation layer152on the substrate11covers the orthographic projections of the plurality of inorganic encapsulation units151on the substrate11. And the organic encapsulation layer152is filled in an interval area between the bridge portion1422and the isolation structure layer12. An orthographic projection of the inorganic encapsulation layer153on the substrate11covers the orthographic projection of the organic encapsulation layer152on the substrate11.

It should be noted that the thin film encapsulation structure provided herein is only exemplary, and a quantity and a stacking relationship of the organic encapsulation layer and the inorganic encapsulation layer in the thin film encapsulation structure may be reasonably adjusted according to an actual requirement.

According to the manufacturing method for the touch display panel provided in the embodiment, the first touch electrode141and the main body portion1421of the second touch electrode142are disposed in the isolation structure layer12, and the bridge portion1422of the second touch electrode142and the first electrode131of the light-emitting device13are disposed in a same layer, so that an in-cell touch scheme is achieved. In this case, on the one hand, there is no need to additionally prepare a touch screen, thereby saving four masks required by the touch screen, and reducing costs; and on the other hand, a thickness of the touch display module may be reduced.

The present disclosure further provides a display apparatus.FIG.15is a schematic structural diagram of a display apparatus according to an embodiment of the present disclosure. As shown inFIG.15, the display apparatus includes the touch display panel1500provided in any one of the above embodiments. The display apparatus is a product equipped with an image display function.

For example, the display apparatus may be configured to display a static image, such as a picture or a photo. The display apparatus may further be configured to display a dynamic image, such as a video. The display apparatus may be a laptop computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted intelligent central control screen, a calculator, a smart watch, a global positioning system (GPS) navigator, an electronic photo, an electronic billboard or indicator, a projector, and the like.

In addition, the display apparatus may further have functions such as photographing, video recording, fingerprint recognition, and face recognition. Correspondingly, the display apparatus may further include at least one functional module configured to implement the foregoing functions, such as an under-screen camera, and an under-screen fingerprint recognition sensor.

The above describes the basic principles of the present disclosure in conjunction with specific embodiments. However, it should be pointed out that the advantages, benefits, effects, and the like mentioned in the present disclosure are only examples and not limitations, and cannot be considered as essential for each embodiment of the present disclosure. In addition, the specific details disclosed above are only for the purpose of providing examples and facilitating understanding, and are not limited. The above details do not limit the necessity for this disclosure to use the above specific details for implementation.

For the purpose of illustration and description, the above description is provided. Furthermore, the description is not intended to limit the embodiments of the present disclosure to the form disclosed herein. Although multiple exemplary aspects and embodiments are discussed above, those skilled in the art recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.