CN117915719A - Display panel, manufacturing method of display panel and electronic equipment - Google Patents

Abstract

The application provides a display panel, a manufacturing method of the display panel and electronic equipment, wherein the display panel comprises the following components: displaying a functional layer; the touch control layer comprises a plurality of touch control wires and at least one light filtering part, the touch control wires are interwoven into a net structure with a plurality of meshes, and the orthographic projection of the light filtering part on the display function layer coincides with the orthographic projection of the meshes on the display function layer. The light filtering part is arranged in the touch layer, and the touch wiring is used for replacing the black matrix to be matched with the light filtering part, so that the function of filtering light and reducing reflection is realized. Therefore, the filter part and the touch control layer are combined into a whole, so that the film occupation can be reduced, and the overall thickness of the display panel is reduced.

Description

Display panel, manufacturing method of display panel and electronic equipment

Technical Field

The application relates to the technical field of display, in particular to a display panel, a manufacturing method of the display panel and electronic equipment.

Background

In some display panels, in order to reduce the reflection of light from the display panel, polarizers are provided in the real panel or a filter layer (Color filter On Encapsulation, COE) technique is used in the encapsulation layer. However, in these display panels, the provision of a polarizer or a filter layer increases the thickness of the display panel.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, an object of the present application is to provide a display panel, which includes:

Displaying a functional layer;

the touch control layer comprises a plurality of touch control wires and at least one light filtering part, the touch control wires are interwoven into a net structure with a plurality of meshes, and the orthographic projection of the light filtering part on the display function layer coincides with the orthographic projection of the meshes on the display function layer.

In one possible implementation manner, the touch layer includes a first wiring layer, an insulating layer and a second wiring layer which are stacked, the second wiring layer includes touch wirings which are interwoven into a mesh structure with a plurality of meshes, the first wiring layer includes bridge wires, and at least part of the touch wirings are electrically connected with the bridge wires through holes penetrating through the insulating layer;

The light filtering part is positioned on the first wiring layer and/or the second wiring layer.

In one possible implementation manner, the light filtering portion is located in the second wiring layer, and the light filtering portion is located in a mesh formed by the touch control wiring.

In one possible implementation manner, the optical filtering portion is located in the first routing layer, and the orthographic projection of the interface of at least two adjacent optical filtering portions on the display functional layer is located in the orthographic projection of the touch routing on the display functional layer.

In one possible implementation manner, the display panel further includes an optical adhesive layer located on a side of the touch layer away from the display functional layer;

preferably, the display panel further comprises a cover plate layer located on one side of the optical adhesive layer away from the display function layer.

In one possible implementation manner, the display functional layer includes a plurality of light emitting sub-pixels, and the plurality of light filtering portions are respectively in one-to-one correspondence with the plurality of light emitting sub-pixels.

Another object of the present application is to provide a method of manufacturing a display panel, the method including:

providing a display function layer;

And forming a touch layer on one side of the display functional layer, wherein the touch layer comprises a plurality of touch wires and at least one light filtering part, the touch wires are interwoven into a net structure with a plurality of meshes, and the orthographic projection of the light filtering part on the display functional layer coincides with the orthographic projection of the meshes on the display functional layer.

In one possible implementation manner, the step of forming a touch layer on one side of the display function layer includes:

forming a first wiring layer on one side of the display function layer, wherein the first wiring layer comprises at least one bridging line;

forming an insulating layer on one side of the first wiring layer far away from the display function layer;

Forming a second wiring layer on one side of the insulating layer far away from the display function layer, wherein the second wiring layer comprises touch wiring which is interwoven into a net structure with a plurality of meshes, and at least part of the touch wiring is electrically connected with the bridging line through a through hole penetrating through the insulating layer;

and the filter part is moved in the mesh formed by interweaving the touch control wires.

In one possible implementation manner, the step of forming a touch layer on one side of the display function layer includes:

Forming a first wiring layer on one side of the display function layer, wherein the first wiring layer comprises at least one bridging line and a plurality of light filtering parts;

forming an insulating layer on one side of the first wiring layer far away from the display function layer;

And a second wiring layer is formed on one side of the insulating layer, which is far away from the display function layer, the second wiring layer comprises touch control wirings which are interwoven into a net structure with a plurality of meshes, at least part of the touch control wirings are electrically connected with the bridging wires through holes penetrating through the insulating layer, and the orthographic projection of the juncture of at least two adjacent light filtering parts on the display function layer is positioned in the orthographic projection of the touch control wirings on the display function layer.

Another object of the present application is to provide an electronic device including the display panel provided by the present application.

Compared with the prior art, the application has the following beneficial effects:

According to the display panel, the manufacturing method of the display panel and the electronic equipment, the light filtering part is arranged in the touch layer, and the touch wiring is used for replacing the black matrix to be matched with the light filtering part, so that the functions of filtering light and reducing reflection are realized. Therefore, the filter part and the touch control layer are combined into a whole, so that the film occupation can be reduced, and the overall thickness of the display panel is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a display panel in the prior art;

FIG. 2 is a schematic cross-sectional view of a display panel according to the present embodiment;

fig. 3 is a schematic diagram of a touch trace and a filter portion provided in the present embodiment;

Fig. 4 is a schematic diagram of a touch electrode according to the present embodiment;

FIG. 5 is a second schematic cross-sectional view of the display panel according to the present embodiment;

FIG. 6 is a third schematic cross-sectional view of the display panel according to the present embodiment;

FIG. 7 is a schematic diagram of a touch trace and a filter portion according to the second embodiment;

FIG. 8 is a schematic cross-sectional view of a display panel according to the present embodiment;

fig. 9 is a flowchart illustrating steps of a method for manufacturing a display panel according to the present embodiment.

Icon: 100-displaying a functional layer; 110-pixel gaps; 120-light emitting sub-pixels; 200-a touch layer; 210-touch wiring; 201-a first wiring layer; 202-an insulating layer; 203-a second wiring layer; 204-an optical cement layer; 211-a first touch electrode; 212-a second touch electrode; 213-bridge wire; 220-a filter; 300-polarizer/COE layer; 400-an optical adhesive layer; 500-cover plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

It should be noted that, in the case of no conflict, different features in the embodiments of the present application may be combined with each other.

The inventor has found that in the existing display panel, in order to reduce the reflection of the display panel, a polarizer or a filter layer is arranged in the panel.

For example, referring to fig. 1, fig. 1 is a schematic diagram of a display panel in the prior art, and such a display panel may include a display function layer 100', a touch layer 200', a polarizer/COE layer 300', an optical adhesive layer 400', and a cover plate 500'. The polarizer/COE layer 300' is used to block the light irradiated to the display function layer 100' from the outside or the light reflected by the display function layer 100' by blocking polarized light or filtering for a specific color, thereby reducing the reflection effect of the display panel.

The provision of a polarizer or a filter layer increases the overall thickness of the display panel. For example, the polarizer may have a thickness of approximately 100 microns and the COE layer may have a thickness of approximately 5 microns.

In view of this, the present embodiment provides a solution capable of further reducing the thickness of the display panel in the case of reducing the reflection of the display panel, and the solution provided in the present embodiment is described in detail below.

Referring to fig. 2, fig. 2 is a schematic cross-sectional view of a display panel according to the present embodiment, where the display panel may include a display function layer 100 and a touch control layer 200.

The display function layer 100 may include a light emitting pixel layer of the array substrate at one side of the array substrate.

In some possible implementations, the array substrate may include a plurality of film structures, such as a substrate, a buffer layer, an active layer, a plurality of metal layers, a plurality of insulating layers 202, a planarization layer, and the like. The multiple film structures of the array substrate can form multiple thin film transistors (Thin Film Transistor, TFT) at different positions of the array substrate, the thin film transistors can form multiple driving units in cooperation with each other, and the driving units are used for driving pixels in the luminous pixel layer to emit light.

The luminescent pixel layer may include a first pixel electrode (e.g., anode), a pixel defining layer having a pixel opening, a luminescent material layer within the pixel opening, and a second pixel electrode (e.g., cathode) entirely covered by the luminescent material layer. Wherein, each pixel opening corresponds to a light emitting sub-pixel 120, and the pixel defining layer between adjacent light emitting sub-pixels 120 corresponds to the pixel gap 110 between the light emitting sub-pixels 120. That is, each of the light emitting sub-pixels 120 has an independent first pixel electrode and light emitting material layer, and the second pixel electrodes of the plurality of light emitting sub-pixels 120 may be connected to each other.

The touch layer 200 is located on a side of the display function layer 100, for example, a layer of the display function layer 100 furthest from the substrate may be a thin film encapsulation layer, and the touch layer 200 may be formed on a side of the thin film encapsulation layer furthest from the substrate. The touch layer 200 includes a plurality of touch traces 210 and at least one filter portion 220, the touch traces 210 are interwoven into a mesh structure having a plurality of meshes, and the front projection of the filter portion 220 on the display function layer 100 coincides with the front projection of the meshes on the display function layer 100.

For example, referring to fig. 3, the touch traces 210 are interwoven into a mesh structure having a plurality of meshes to form touch electrodes for performing touch detection. The front projection of the mesh structure on the display function layer 100 corresponds to the position of the light emitting sub-pixel 120 in the display function layer 100, and the front projection of the touch trace 210 on the display function layer 100 corresponds to the pixel gap 110.

The touch trace 210 is made of a light-tight material, for example, a light-tight metal. The filter part 220 is made of a material that transmits light of a specific color, for example, a red, green or blue light-transmitting material.

Alternatively, in the present embodiment, the display function layer 100 includes a plurality of light emitting sub-pixels 120, and the plurality of light filtering portions 220 are respectively in one-to-one correspondence with the plurality of light emitting sub-pixels 120. The front projection of each filter 220 on the display function layer 100 coincides with the front projection of one mesh on the display function layer 100, i.e. the front projection of each filter 220 on the display function layer 100 corresponds to one light emitting sub-pixel 120.

Specifically, in the present embodiment, the color of the filter portion 220 corresponding to one light emitting sub-pixel 120 is the same as that of the light emitting sub-pixel 120, for example, the color of the filter portion 220 corresponding to the red light emitting sub-pixel 120 is red, the color of the filter portion 220 corresponding to the green light emitting sub-pixel 120 is green, and the color of the filter portion 220 corresponding to the blue light emitting sub-pixel 120 is blue.

Based on the above design, in the display panel provided by the present embodiment, the light filtering portion 220 is disposed in the touch layer 200, and the touch wiring 210 is used to replace the black matrix in the original COE scheme to cooperate with the light filtering portion 220, so as to realize the function of light filtering and reflection reduction. Thus, the filter 220 and the touch layer 200 are combined into one, so that the film occupation can be reduced, and the overall thickness of the display panel can be reduced.

In some possible implementations, referring to fig. 4, the touch trace 210 may form a plurality of first touch electrodes 211 extending along a first direction and a plurality of second touch electrodes 212 extending along a second direction, one of the first touch electrodes 211 and the second touch electrodes 212 may be used as an electrode for transmitting a touch excitation signal, and the other may be used as an electrode for receiving a touch sensing signal. The first touch electrode 211 and the second touch electrode 212 may be formed by connecting a plurality of electrode blocks, and the electrode blocks include a mesh structure formed by the touch wires 210.

Further, referring to fig. 4 again, the non-intersecting portions of the first touch electrode 211 and the second touch electrode 212 may be located on the same film layer, and at the intersecting position of the first touch electrode 211 and the second touch electrode 212, the second touch electrode 212 may be disconnected, and the disconnected portion may be connected by a bridging line 213 of another film layer.

Specifically, referring to fig. 5, fig. 5 is a schematic cross-sectional view of the A-A position in fig. 4, the touch layer 200 includes a first trace layer 201, an insulating layer 202 and a second trace layer 203 stacked together, the touch trace 210 is located on the second trace layer 203, the touch trace 210 is interwoven to form a first touch electrode 211 and a second touch electrode 212 having a mesh structure with a plurality of meshes, the second touch electrode 212 is disconnected at a position crossing the first touch electrode 211, and the disconnected position is electrically connected with a bridging line 213 located on the first trace layer 201 through a through hole penetrating through the insulating layer 202.

In this case, the filter 220 is located on the first trace layer 201 and/or the second trace layer 203. For example, after the bridge wire 213 or the touch trace 210 is formed, the filter 220 having the same layer as the bridge wire 213 or the touch trace 210 is formed by vapor deposition.

Further, in one possible implementation, please refer to fig. 6, fig. 6 is a schematic cross-sectional view of the B-B position shown in fig. 2, wherein the filter portion 220 is located in the second trace layer 203, and the filter portion 220 is located in a mesh formed by the touch trace 210. For example, after forming the touch traces 210 interwoven into a mesh structure in the second trace layer 203 by etching, the filter portions 220 are formed in each mesh by evaporation using a mask.

In this way, the light filtering portion 220 and the touch trace 210 that replaces the black matrix are arranged on the same layer, so that a light leakage gap between the light filtering portion 220 and the touch trace 210 can be avoided, and a light filtering effect is ensured. Meanwhile, the filter 220 is disposed in the mesh formed by interweaving the touch traces 210, and the filter 220 can be better aligned with the light emitting sub-pixels 120 by restricting the forming position of the filter 220 by the mesh formed by the touch traces 210, so as to improve the alignment accuracy.

In another possible implementation, please refer to fig. 7 and 8, fig. 7 is another schematic diagram of the touch trace 210 and the filter 220 provided in the present embodiment, and fig. 8 is a schematic cross-sectional view of the C-C position shown in fig. 7. The optical filter 220 is located in the first trace layer 201, and the front projection of the boundary of at least two adjacent optical filter 220 on the display function layer 100 is located in the front projection of the touch trace 210 on the display function layer 100. For example, after the bridge line 213 is formed in the first wiring layer 201 by etching, the plurality of filter portions 220 are formed by vapor deposition using a mask, so that the positions of the boundary between adjacent filter portions 220 correspond to the positions of the pixel gaps 110 between the pixels and the orthographic projection on the display function layer 100. Then, the insulating layer 202 and the second trace layer 203 are manufactured, so that the front projection of the boundary of the adjacent filter portions 220 on the display function layer 100 is located in the front projection of the touch trace 210 on the display function layer 100.

Therefore, the opaque touch trace 210 can cover the junction of the adjacent light filtering portions 220, so as to avoid light leakage gaps and ensure the light filtering effect.

In one possible implementation, referring again to fig. 6 or 8, the display panel further includes an optical adhesive layer 204 located on a side of the touch layer 200 away from the display function layer 100. That is, the optical adhesive layer 204 can be shared by the touch trace 210 and the optical filter 220, and the optical adhesive layer 204 can provide protection for the touch trace 210 and the optical filter 220 at the same time, so that the manufacturing process can be saved, and the manufacturing cost can be reduced.

Optionally, the display panel further includes a cover layer located on a side of the optical adhesive layer 204 away from the display function layer 100.

Referring to fig. 9, the present embodiment also provides a method for manufacturing a display panel, which may include the following steps.

In step S110, a display function layer 100 is provided.

In step S120, a touch layer 200 is formed on one side of the display function layer 100, the touch layer 200 includes a plurality of touch traces 210 and at least one filter portion 220, the touch traces 210 are interwoven into a mesh structure having a plurality of meshes, and the orthographic projection of the filter portion 220 on the display function layer 100 coincides with the orthographic projection of the meshes on the display function layer 100.

Optionally, in one possible implementation, the following sub-steps may be included in step S120.

In step S201, a first wiring layer 201 is formed on one side of the display function layer 100, and the first wiring layer 201 includes at least one bridging line 213.

In this embodiment, the bridge line 213 may be formed by first providing an entire covered first metal layer and then etching the first metal layer.

In step S202, an insulating layer 202 is formed on the side of the first wiring layer 201 away from the display function layer 100.

In this embodiment, the material of the insulating layer 202 may be silicon dioxide (SiO 2).

In step S203, a second trace layer 203 is formed on the side of the insulating layer 202 away from the display function layer 100, and the second trace layer 203 includes touch traces 210 interwoven into a mesh structure having a plurality of meshes, at least a portion of the touch traces 210 are electrically connected to the bridging lines 213 through vias penetrating through the insulating layer 202.

In this embodiment, a whole covered second metal layer may be first disposed, and then the second metal layer is etched, so as to form the touch trace 210 interwoven into a mesh structure.

In step S204, the in-mesh travel filter 220 is formed by interweaving the touch traces 210.

For example, after the touch traces 210 interwoven into the mesh structure in step S203 are formed, different masks may be used to vapor-deposit the light filtering portions 220 with different colors into the meshes of the mesh structure. In this process, the forming position of the filtering portion 220 is constrained by the mesh formed by the touch trace 210, so that the filtering portion 220 can be better aligned with the light emitting sub-pixel 120, and the alignment accuracy is improved.

Alternatively, in another possible implementation, the following sub-steps may be included in step S120.

In step S301, a first wiring layer 201 is formed on one side of the display function layer 100, and the first wiring layer 201 includes at least one bridging line 213 and a plurality of filtering portions 220.

In this embodiment, the bridge line 213 may be formed by first providing an entire covered first metal layer and then etching the first metal layer. And then, respectively adopting different masks to perform vapor deposition to form filter parts 220 with different colors, and enabling the orthographic projection of the boundary of the adjacent filter parts 220 on the display function layer 100 to correspond to the pixel gap 110 between the luminous sub-pixels 120.

In step S302, the insulating layer 202 is formed on the side of the first wiring layer 201 away from the display function layer 100.

In this embodiment, the material of the insulating layer 202 may be silicon dioxide (SiO 2).

In step S303, a second trace layer 203 is formed on the side of the insulating layer 202 away from the display function layer 100, the second trace layer 203 includes touch traces 210 interwoven into a mesh structure having a plurality of meshes, at least a portion of the touch traces 210 are electrically connected to the bridging lines 213 through vias penetrating through the insulating layer 202, and orthographic projections of the junctions of at least two adjacent filter portions 220 on the display function layer 100 are located in orthographic projections of the touch traces 210 on the display function layer 100.

In this embodiment, a whole covered second metal layer may be first disposed, and then the second metal layer is etched, so as to form the touch trace 210 interwoven into a mesh structure. Since the front projection of the touch trace 210 on the display panel generally corresponds to the pixel gap 110 between the light emitting sub-pixels 120, after the touch trace 210 is formed, the front projection of the boundary of the adjacent light filtering portion 220 on the display function layer 100 may be located within the front projection of the touch trace 210 on the display function layer 100

The application also provides electronic equipment which comprises the display panel provided by the application, and the electronic equipment can comprise equipment with display and touch control functions such as a mobile phone, a tablet personal computer, intelligent wearing equipment, a television, a notebook computer, a display and the like.

In summary, according to the display panel, the manufacturing method of the display panel and the electronic device provided by the application, the light filtering part is arranged in the touch layer, and the touch wiring is used for replacing the black matrix to cooperate with the light filtering part, so that the functions of filtering light and reducing reflection are realized. Therefore, the filter part and the touch control layer are combined into a whole, so that the film occupation can be reduced, and the overall thickness of the display panel is reduced.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. A display panel, the display panel comprising:

Displaying a functional layer;

the touch control layer comprises a plurality of touch control wires and at least one light filtering part, the touch control wires are interwoven into a net structure with a plurality of meshes, and the orthographic projection of the light filtering part on the display function layer coincides with the orthographic projection of the meshes on the display function layer.

2. The display panel according to claim 1, wherein the touch layer includes a first wiring layer, an insulating layer, and a second wiring layer stacked and disposed, the second wiring layer includes touch wirings interleaved in a mesh structure having a plurality of meshes, the first wiring layer includes bridge wires, and at least a portion of the touch wirings are electrically connected to the bridge wires through vias penetrating the insulating layer;

The light filtering part is positioned on the first wiring layer and/or the second wiring layer.

3. The display panel according to claim 2, wherein the light filtering portion is located in the second wiring layer, and the light filtering portion is located in a mesh formed by the touch wiring.

4. The display panel according to claim 2, wherein the light filtering portion is located in the first wiring layer, and the orthographic projection of the interface of at least two adjacent light filtering portions on the display functional layer is located in the orthographic projection of the touch wiring on the display functional layer.

5. The display panel of claim 1, further comprising an optical adhesive layer on a side of the touch layer remote from the display function layer;

preferably, the display panel further comprises a cover plate layer located on one side of the optical adhesive layer away from the display function layer.

6. The display panel according to claim 1, wherein the display function layer includes a plurality of light emitting sub-pixels, and the plurality of light filtering portions are respectively in one-to-one correspondence with the plurality of light emitting sub-pixels.

7. A method of manufacturing a display panel, the method comprising:

providing a display function layer;

And forming a touch layer on one side of the display functional layer, wherein the touch layer comprises a plurality of touch wires and at least one light filtering part, the touch wires are interwoven into a net structure with a plurality of meshes, and the orthographic projection of the light filtering part on the display functional layer coincides with the orthographic projection of the meshes on the display functional layer.

8. The method of claim 7, wherein the step of forming a touch layer on one side of the display function layer comprises:

forming a first wiring layer on one side of the display function layer, wherein the first wiring layer comprises at least one bridging line;

forming an insulating layer on one side of the first wiring layer far away from the display function layer;

Forming a second wiring layer on one side of the insulating layer far away from the display function layer, wherein the second wiring layer comprises touch wiring which is interwoven into a net structure with a plurality of meshes, and at least part of the touch wiring is electrically connected with the bridging line through a through hole penetrating through the insulating layer;

and the filter part is moved in the mesh formed by interweaving the touch control wires.

9. The method of claim 7, wherein the step of forming a touch layer on one side of the display function layer comprises:

Forming a first wiring layer on one side of the display function layer, wherein the first wiring layer comprises at least one bridging line and a plurality of light filtering parts;

forming an insulating layer on one side of the first wiring layer far away from the display function layer;

And a second wiring layer is formed on one side of the insulating layer, which is far away from the display function layer, the second wiring layer comprises touch control wirings which are interwoven into a net structure with a plurality of meshes, at least part of the touch control wirings are electrically connected with the bridging wires through holes penetrating through the insulating layer, and the orthographic projection of the juncture of at least two adjacent light filtering parts on the display function layer is positioned in the orthographic projection of the touch control wirings on the display function layer.

10. An electronic device comprising the display panel of any one of claims 1-6.