CN116471877A

CN116471877A - Display panel, manufacturing method thereof and display device

Info

Publication number: CN116471877A
Application number: CN202310565154.4A
Authority: CN
Inventors: 夏维; 刘斌; 杜宜德; 周鑫; 王云浩
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2023-07-21

Abstract

The embodiment of the application provides a display panel, a manufacturing method thereof and a display device, wherein the display panel comprises: the light-emitting device comprises a substrate, a plurality of light-emitting areas arranged on one side of the substrate in an array manner, and reflection reducing areas surrounding the light-emitting areas; the light emitting region includes: the cathode is positioned on one side of the light-emitting structure far away from the substrate; the reflection reducing region includes: the cathode is provided with a plurality of hollowed holes and cathode wires which are arranged between every two adjacent hollowed holes at intervals in the reflection reducing area; the cathode lead is connected with one side of the reflection reducing region close to the light emitting region and one side of the reflection reducing region far away from the light emitting region respectively. The display panel provided by the embodiment of the application sets up around the luminous region and falls the reflection district, carries out the fretwork to the negative pole, reduces the reflection to outside ambient light around the luminous region, and then reduces the reflection of display panel to outside ambient light.

Description

Display panel, manufacturing method thereof and display device

Technical Field

The embodiment of the application relates to the technical field of display devices, in particular to a display panel, a manufacturing method of the display panel and a display device.

Background

An Organic Light-Emitting Diode (OLED) display device has advantages of high luminous efficiency, high luminous brightness, and the like. The reflection of the display surface of the OLED display panel to external environment light is reduced, and the display effect of the display panel can be effectively improved. However, some components in the OLED display panel, such as a cathode made of metal, still reflect external ambient light, thereby adversely affecting the display quality of the display panel. Accordingly, a problem that needs to be solved by the current technicians is how to reduce the reflection of the external ambient light by the OLED display panel.

It should be noted that the information for distinguishing the invention in the above background art is only for enhancing the understanding of the background of the invention and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The embodiment of the application provides a display panel, a manufacturing method of the display panel and a display device, and aims to reduce reflection of the display panel to external ambient light.

In one aspect, an embodiment of the present application provides a display panel, including: the light-emitting device comprises a substrate, a plurality of light-emitting areas arranged on one side of the substrate in an array manner and reflection reducing areas surrounding the light-emitting areas;

the light emitting region includes: the light-emitting structure and the cathode are positioned on one side of the light-emitting structure far away from the substrate;

the reflection reducing region includes: the cathode is provided with a plurality of hollowed holes and cathode wires which are arranged between every two adjacent hollowed holes at intervals in the reflection reducing area;

the cathode lead is connected with one side of the reflection reducing region close to the light emitting region and one side of the reflection reducing region far away from the light emitting region respectively.

Optionally, the light emitting region further includes: the color filter unit is positioned at one side of the cathode far away from the light-emitting structure;

the color filter unit extends to the reflection reducing region and is positioned at one side of the plurality of hollowed-out holes and the cathode lead far away from the pixel definition structure.

Optionally, the method further comprises: light shielding areas arranged between adjacent reflection reducing areas at intervals;

the light shielding region includes: the pixel definition structure comprises an extended pixel definition structure, an extended cathode and a black matrix positioned on one side of the cathode away from the pixel definition structure.

Optionally, the plurality of hollowed holes and the cathode lead extend to the light shielding region and are located between the black matrix and the pixel defining structure.

Optionally, the hollowed-out holes are in a sector ring shape and are arranged around the light-emitting structure array;

the cathode lead includes: and the straight-line segment lead is respectively connected with one side of the reflection reducing region, which is close to the light-emitting region, and one side of the reflection reducing region, which is far away from the light-emitting region.

Optionally, the hollowed-out hole includes: a plurality of first fan ring apertures and a plurality of second fan ring apertures;

the plurality of first fan-ring holes are arranged around the light-emitting structure array, and the plurality of second fan-ring holes are arranged around the plurality of first fan-ring holes;

the cathode lead includes: the linear segment leads are respectively connected with one side of the reflection reducing region, which is close to the light emitting region, and one side of the reflection reducing region, which is far away from the light emitting region, and the annular segment leads are arranged between the plurality of first annular fan holes and the plurality of second annular fan holes at intervals.

Optionally, an included angle formed between a surface of the pixel defining structure, which is close to one side of the light emitting structure, and a surface of the light emitting structure, which is far away from the substrate, is greater than 90 ° and less than 180 °;

the display panel further includes: a buffer region arranged between the light-emitting region and the reflection reducing region at intervals; the pixel definition structure is close to one side of the light-emitting structure and the cathode extends to the buffer area and extends to the edge contact of the light-emitting area and one side of the light-emitting structure close to the substrate.

Optionally, a ratio between a width of an overlap of an orthographic projection of the light emitting region on the substrate and an orthographic projection of a side of the pixel defining structure close to the light emitting structure on the substrate and a width of an orthographic projection of a side of the pixel defining structure close to the light emitting structure on the substrate along a direction of the light emitting region toward the light emitting region is greater than 1/3 and less than 1/2.

Optionally, the surface reflectivity of the pixel defining structure is below a preset reflectivity threshold.

Optionally, the method further comprises: a thin film encapsulation layer between the cathode and the color filter unit;

wherein, the film packaging layer fills the plurality of hollowed-out holes.

Compared with the prior art, the display panel provided by the embodiment of the application has the following advantages:

according to the embodiment of the application, the hollow cathode is arranged in the reflection-reducing area around the light-emitting area of the display panel, the cathode reflection area of the reflection-reducing area is reduced, the reflectivity of the pixel definition structure is lower than that of the metal cathode, the reflection of the display panel to external ambient light is reduced, and the display effect of the display panel is improved.

In still another aspect, an embodiment of the present application further provides a method for manufacturing a display panel, including:

providing a substrate;

a pixel definition structure is manufactured in a reflection reducing area at one side of the substrate;

manufacturing a light-emitting structure in the light-emitting areas which are surrounded by the reflection reducing areas and are arranged in an array;

manufacturing a cathode on one side of the light-emitting structure and one side of the pixel definition structure, which are far away from the substrate; the cathode is provided with a plurality of hollowed holes in the reflection reducing region and cathode wires arranged between every two adjacent hollowed holes at intervals;

Optionally, the step of obtaining a cathode on a side of the light emitting structure and the pixel defining structure away from the substrate includes:

and obtaining the cathode on one side of the light emitting structure and the pixel definition structure, which is far away from the substrate, based on an FMM Mask process.

Compared with the prior art, the manufacturing method of the display panel provided by the embodiment of the application has the following advantages:

(1) The display panel obtained by the manufacturing method has all the advantages of the display panel in any one of the embodiments.

(2) Compared with the related art, the manufacturing method has the advantages that the patterning of the cathode can be realized only by utilizing the FMM mask process in the cathode manufacturing process, and the whole manufacturing process of the display panel is not required to be exchanged, so that the manufacturing popularization of the display panel is facilitated.

In still another aspect, an embodiment of the present application further provides a display device, including the display panel in the foregoing embodiment or a display panel manufactured by using the method in the foregoing embodiment.

The display device provided by the embodiment of the application, including the display panel in the above embodiment, also has all the advantages of the above display panel.

Drawings

The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present application. The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Fig. 1 is a schematic diagram showing a principle of reflection of external ambient light by a display panel according to the related art;

FIG. 2 is a schematic diagram showing the defective products of multi-turn halos of a display panel according to the related art;

FIG. 3 is a schematic cross-sectional view of a display panel according to one embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of a display panel according to another embodiment of the present disclosure;

FIG. 5 shows a schematic plan view of a cathode in one embodiment provided herein;

FIG. 6 shows a schematic plan view of a further cathode in one embodiment provided herein;

FIG. 7 is a schematic cross-sectional view of a display panel according to another embodiment of the present disclosure;

fig. 8 is a flowchart illustrating steps of a method for manufacturing a display panel according to an embodiment of the present application.

Reference numerals illustrate:

10-a substrate; 20-pixel definition structure; 30-a light emitting structure; 40-cathode; 41-hollowed holes; 42-cathode lead; 411-a first hollowed-out hole; 412-a second hollowed-out hole; 421-straight wire; 422-loop wire segment wire; 50-a color filter unit; a 60-black matrix; 70-anode; 101-a cover plate; 102-a touch electrode; 103-an overcoat layer; 104-a second insulating layer; 105-a touch graphic layer; 106-a first insulating layer; 107-a second inorganic layer; 108-inkjet printing a layer; 109-a first inorganic layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

Polarizers were first used in the display field for liquid crystal display panels (Liquid Crystal Display, LCDs) to form polarized light to achieve color and contrast. The polaroid is applied to the OLED panel, and can play a role in adjusting the filtering effect of light entering from the outside, so that a user can clearly see a screen picture in sunlight. However, after the polarizer is assembled, the thickness of the OLED panel is increased by 50 to 100 micrometers, and the light-emitting brightness is greatly lost. The related art proposes a polarization-free technology (POL-Less) to replace the function of the original polarizer in the OLED display panel, wherein the color film packaging technology (Color filter on encapsulation, COE) is used for photoetching a layer of color filter film after the display device is packaged to replace the function of the polarizer, so that the reflection of the display panel can be reduced to improve the display effect, the transmittance can be improved, the power consumption and the thickness of the display panel can be reduced, and the polarization-free technology is widely applied to the current OLED display panel, so that the OLED display panel has the advantages of low power consumption, high color gamut, strong manufacturing controllability and the like.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a principle of reflection of external ambient light by a display panel according to the related art. As shown in fig. 1, the transmittance of the color filter film is higher than that of the polarizer, so that external ambient light more easily passes through the color filter unit 50 in the color filter film to reach the rest of the components in the display panel, and the surfaces of the rest of the components may reflect the external ambient light and then pass through the color filter unit 50 to reflect to the outside of the display panel, so that the reflection of the display panel to the external ambient light is higher than that of the display panel using the polarizer technology.

Referring to fig. 2, fig. 2 shows a defective product schematic of a multi-turn halo of a display panel in the related art. As shown in fig. 2, the inventor has found that, in order to ensure a viewing angle, the openings of the black matrix 60 in the same layer as the color filter unit 50 in the color filter film need to be set larger than the pixel defining structure 20, so that the cathode 40 with a larger area reflects external ambient light, and the display panel may exhibit multi-turn halation in the display area due to the reflection of the external ambient light by the cathode 40 around the light emitting area, thereby reducing the display quality of the display panel.

The inventors have also found that by reducing the pixel aperture ratio, i.e., reducing the aperture of the pixel defining structure 20 and the aperture of the black matrix 60 at the same time, or reducing the aperture size difference between the aperture of the pixel defining structure 20 and the black matrix 60, it is possible to reduce the reflection of external ambient light by the cathode 40 around the light emitting region, thereby reducing the reflection of external ambient light by the display panel, and improving the problem that the display panel has multiple halos due to the color separation phenomenon in the display region, but reducing the pixel aperture ratio reduces the lifetime of the display panel, and reducing the aperture size difference between the aperture of the pixel defining structure 20 and the black matrix 60 reduces the viewing angle of the display panel.

Therefore, the embodiment of the application provides a display panel, a manufacturing method thereof and a display device, wherein the reflection of the cathode 40 to external ambient light is considered, the hollow holes 41 are arranged on the cathode 40 around the light-emitting area, and the reflection area of the cathode 40 is reduced on the premise of not affecting the function of the cathode 40, so that the reflection of the whole display panel to external ambient light is reduced, and the display effect of the display panel is improved.

Embodiments of the present application are described below with reference to the accompanying drawings.

Referring to fig. 3, fig. 3 is a schematic cross-sectional structure of a display panel according to an embodiment of the present application. As shown in fig. 3, an embodiment of the present application provides a display panel, including: the light-emitting device comprises a substrate 10, a plurality of light-emitting areas arranged on one side of the substrate 10 in an array manner and a reflection reducing area surrounding each light-emitting area.

The display panel may be an OLED display panel, or may further be a display panel adopting a COE technology.

The substrate 10 may be an array driving back plate provided with a circuit, and the light emitting structure 30 is connected with the circuit, so that the electroluminescent material in the light emitting structure 30 can realize self-luminescence under the condition of power on.

The light emitting region may be matched to the shape of the sub-pixel. Specifically, the light emitting region may be defined as a corresponding circle, rectangle, ellipse, or diamond shape of a plurality of array arrangements according to a sub-pixel shape design of the display panel.

Accordingly, the reflection reducing region may be correspondingly circular, rectangular, elliptical, or rhombic around a circle of the rectangle.

The light emitting region includes: a light emitting structure 30, a cathode 40 located on a side of the light emitting structure 30 remote from the substrate 10.

The light emitting structure 30 may include an Electroluminescent (EL) material.

The cathode 40 is used to inject electrons into the light emitting structure 30, causing the light emitting structure 30 to emit light. The cathode 40 may employ a metal conductive material, and in particular, which material is used may be determined according to the OLED type of the display panel. Illustratively, the cathode 40 may employ a magnesium (Mg) silver (Ag) alloy material or a zinc (Zn) alloy material.

In order to realize the light emitting function of the light emitting structure 30, an anode 70 (not shown in fig. 3) may be further included between the light emitting structure 30 and the substrate 10, and form a loop with the cathode 40, so that the light emitting structure 30 is electrically powered to emit light.

The reflection reducing region includes: the pixel defining structure 20, a cathode 40 extending to a side of the pixel defining structure 20 away from the substrate 10, wherein the cathode 40 has a plurality of hollow holes 41 in the reflection reducing region and cathode wires 42 disposed between every two adjacent hollow holes 41 at intervals.

Wherein the reflectivity of the surface of the pixel defining structure 20 remote from the side of the substrate 10 is lower than the reflectivity of the cathode 40 remote from the side of the pixel defining structure 20.

Specifically, the pixel defining structure 20 may be a gray black material with low transmittance and low reflectivity, and the hollowed-out hole 41 on the cathode 40 makes the external ambient light irradiate on the pixel defining structure 20 in the reflection reducing region, so as to reduce the reflection to the outside.

Specifically, the pixel defining structure 20 may form openings in one-to-one correspondence with the positions and shapes of the light emitting regions for disposing the light emitting structures 30.

To ensure the effect of the reflection reducing, optionally, in the case where the black matrix 60 is disposed on the side of the pixel defining structure 20 away from the substrate 10 for shielding light, the edge of the side of the reflection reducing region away from the light emitting region coincides with the edge of the side of the black matrix 60 close to the light emitting region, or the edge of the reflection reducing region away from the light emitting region is located on the side of the edge of the side of the black matrix 60 close to the light emitting region away from the light emitting region.

The cathode lead 42 is connected to a side of the anti-reflection region close to the light emitting region and a side of the anti-reflection region far from the light emitting region, respectively.

The cathode lead 42 can connect the cathode 40 of the light emitting region with the cathode 40 of the light shielding region to complete the circuit function of the whole cathode 40, so that each light emitting structure 30 can realize circuit conduction.

Through the above embodiment, the hollowed-out patterning design is performed on the cathode 40 of the reflection-reducing region around the light-emitting region, so that the reflection surface of the cathode 40 is reduced, the reflection of external ambient light is reduced, the problem that the display panel presents multiple rings of halations due to the color separation phenomenon in the display region can be effectively improved, and the display effect of the display panel is further improved. Moreover, by adopting the design of the embodiment of the present application, even if the opening of the black matrix 60 on the same layer as the color filter unit 50 is set larger than the pixel defining structure 20, the viewing angle of the display panel can be kept at a higher level, and the embodiment of the present application can also improve the problem that the display panel has multiple halos in the display area due to the color separation phenomenon by reducing the reflection of the cathode 40 around the light emitting area to the external ambient light, thereby further improving the display effect of the display panel.

Referring to fig. 4, fig. 4 is a schematic cross-sectional structure of still another display panel according to an embodiment of the present application. As shown in fig. 4, in the display panel of the COE technology, a portion of the black matrix 60 having an opening larger than the opening of the pixel defining structure 20 may be purposefully reduced in reflection, considering that the reflection of external ambient light is more serious than that of the display panel of the conventional polarizer technology. To this end, in an alternative embodiment, the present application further provides a display panel, wherein the light emitting region further includes: a color filter unit 50 located at a side of the cathode 40 remote from the light emitting structure 30.

Specifically, the color filter unit 50 may be disposed in the same layer as the black matrix 60, constituting a color filter film, and the opening of the black matrix 60 may be used to dispose the color filter unit 50.

The color filter units 50 may be arranged in a one-to-one correspondence with the light emitting areas. Specifically, the color filter unit 50 may include a red color filter unit 50, a green color filter unit 50, and a blue color filter unit 50.

The color filter unit 50 extends to the reflection reducing region and is located at a side of the plurality of hollow holes 41 and the cathode wire 42 away from the pixel defining structure 20.

In the embodiment of the present application, the display panel adopts the COE technology, and the color filter unit 50 may be obtained by photolithography. Through the above embodiment, the color filter units 50 extend to the reflection reducing region, the area of the color filter units 50 is larger than the area of the light emitting structures 30 corresponding to the color filter units one by one, and the front projection of the color filter units 50 on the substrate 10 covers the front projection of the light emitting structures 30 on the substrate 10. That is, the opening of the black matrix 60 is larger than the opening of the pixel defining structure 20, so that the light emitted from the light emitting structure 30 may obliquely pass through the color filter unit 50 at a larger angle, thereby realizing a larger-angle light emitting display, and thus, the viewing angle of the display panel may be effectively ensured.

Through the above embodiment, the pixel defining structure 20 may be a gray black material with low transmittance and low reflectivity, the color filter unit 50 extends to make the opening of the black matrix 60 larger than the opening of the pixel defining structure 20, so as to meet the requirement of the visual angle of the display panel, and the reflection reducing area around the light emitting structure 30 is opposite to the extending color filter unit 50, and the hollow hole 41 is provided on the cathode 40, so that the external ambient light irradiates on the pixel defining structure 20 in the reflection reducing area, and the reflection to the outside is reduced, so that the visual angle of the display panel can be ensured, and the reflection to the external ambient light can be reduced.

To this end, in an alternative embodiment, the present application further provides a display panel, further including: and the shading areas are arranged between adjacent reflection reducing areas at intervals.

The light shielding region includes: the pixel defining structure 20 is extended, the cathode 40 is extended, and the black matrix 60 is located on a side of the cathode 40 remote from the pixel defining structure 20.

Through the above-described embodiments, the black matrix 60 may block a portion of the external ambient light, and the remaining portion of the external ambient light may pass through the color filter unit 50 to reach the reflection reducing region to reduce reflection of the external ambient light.

In view of the limitation of the processing precision, for the convenience of manufacturing, the plurality of hollowed holes 41 and the cathode wires 42 spaced between every two adjacent hollowed holes 41 may also extend below the black matrix 60. For this purpose, in an alternative embodiment, the plurality of hollowed-out holes 41 and the cathode wires 42 extend to the light shielding area and are located between the black matrix 60 and the pixel defining structure 20.

Considering that the length of the cathode lead 42 needs to be controlled, the resistance of the cathode 40 is increased. To this end, in a further alternative embodiment, the orthographic projection of the edge of the light-emitting region on the side facing away from the light-emitting region on the substrate 10 may coincide with the orthographic projection of the edge of the light-shielding region on the side facing toward the light-emitting region on the substrate 10. Therefore, the length of the cathode wire 42 can be reduced without increasing the area of the hollowed-out hole 41 on the cathode 40 as much as possible, so as to reduce the resistance of the cathode 40, thereby ensuring the function of the cathode 40 to the greatest extent, and enabling the external ambient light to irradiate on the anti-reflection area as much as possible after passing through the color filter unit 50.

In order to make the light emitted from the light emitting structure 30 be emitted at a larger angle, the viewing angle of the display panel is increased. In an alternative embodiment, the present application also provides a display panel, wherein the color filter unit 50 further extends to a side of the black matrix 60 remote from the cathode 40.

Referring to fig. 5, fig. 5 shows a schematic plan view of a cathode 40 in one embodiment provided herein. As shown in fig. 5, in the case where the light emitting region or the light emitting structure 30 is circular, the light-falling reflection region may be circular. In order to uniformly distribute the hollowed holes 41 or the cathode wires 42, improve the conductivity and uniformity of reflection of external ambient light, in an alternative embodiment, the application further provides a display panel, where the hollowed holes 41 are in a fan-shape and are arrayed around the light emitting structure 30.

The cathode lead 42 includes: and a straight line segment wire 421 connected to a side of the reflection reducing region close to the light emitting region and a side of the reflection reducing region far from the light emitting region, respectively.

The number of the hollowed-out holes 41 can be determined according to the machining process precision or the conductivity requirement of the cathode lead 42. Correspondingly, the number of cathode wires 42 between every two adjacent hollow holes 41 is equal to that of the hollow holes 41, and the cathode wires are uniformly distributed around the light-emitting area and fully spread the reflection-reducing area.

Referring to fig. 6, fig. 6 shows a schematic plan view of a further cathode 40 in one embodiment provided herein. As shown in fig. 6, the present application further contemplates adding loop wire segment wires 422 in the anti-reflection region to achieve parallel connection of straight wire segment wires 421, thereby further reducing the resistance of the cathode 40 in the anti-reflection region. To this end, in an alternative embodiment, the present application further provides a display panel, wherein the hollowed-out hole 41 includes: a plurality of first sector ring apertures and a plurality of second sector ring apertures.

Wherein the plurality of first fan-ring holes are arranged in an array around the light emitting structure 30, and the plurality of second fan-ring holes are arranged in an array around the plurality of first fan-ring holes;

the cathode lead 42 includes: straight-line segment wires 421 respectively connected with one side of the reflection reducing region close to the light emitting region and one side of the reflection reducing region far away from the light emitting region, and loop-line segment wires 422 arranged between the plurality of first loop holes and the plurality of second loop holes at intervals.

In order to achieve convergence and integration of light emitted by the light emitting structure 30 and to achieve a viewing angle of the display panel, the side wall surface of the opening of the pixel defining structure 20 has a slope, but the slope of the opening of the pixel defining structure 20 also facilitates the escape of external ambient light from the display panel, and enhances the reflection of the external ambient light, thereby forming multiple halos and adversely affecting the display effect. The embodiment of the present application considers that if the slope angle of the opening of the pixel defining structure 20 is increased, although the reflected light of the external ambient light can not easily escape from the display panel, the thickness of the encapsulation layer needs to be correspondingly increased, and the viewing angle of the display panel is reduced. Accordingly, in order to reduce the reflection of the display panel to the external ambient light and further improve or even eliminate the formation of multi-turn halation caused by color separation and improve the display effect of the display panel under the condition of reducing the influence on the viewing angle of the display panel, in an alternative embodiment, the application further provides a display panel, wherein an included angle formed between the surface of the pixel defining structure 20 on the side close to the light emitting structure 30 and the surface of the light emitting structure 30 on the side far from the substrate 10 is greater than 90 ° and less than 180 °.

The display panel further includes: and the buffer area is arranged between the light-emitting area and the reflection reducing area at intervals. The pixel defining structure 20 extends to the buffer region near one side of the light emitting structure 30 and the cathode 40, and extends to the light emitting region to contact with one side edge of the light emitting structure 30 near the substrate 10.

That is, the opening of the pixel defining structure 20 is used to place the light emitting structure 30, and the light emitting material in the light emitting structure 30 may be obtained by deposition. Thus, the open bottom of the pixel defining structure 20 overlaps the bottom of the light emitting structure 30,

along the vertical plane of the reflection light path of the external ambient light, the reflection reducing region may partially overlap with the surface of the pixel defining structure 20 near the light emitting region, so that the reflection of the external ambient light by the surface of the pixel defining structure 20 near the light emitting region may be reduced as much as possible within a specific overlapping range, thereby reducing the reflection of the external ambient light in the opening of the pixel defining structure 20, or the cathode 40 may be fully electrically connected with the light emitting structure 30 by extending the cathode 40 to the buffer region with a reasonable buffer region width, so as to further ensure the light emitting function of the light emitting structure 30. To this end, in an alternative embodiment, the present application further provides a display panel, wherein the ratio between the width of the overlap of the orthographic projection of the light emitting region onto the substrate 10 and the orthographic projection of the side of the pixel defining structure 20 close to the light emitting structure 30 onto the substrate 10 along the direction of the light emitting region towards the light reflecting region, and the width of the orthographic projection of the side of the pixel defining structure 20 close to the light emitting structure 30 onto the substrate 10 is greater than 1/3 and less than 1/2.

By the above embodiment, the overlapping width range of the optimal reflection reducing region and the side surface of the pixel defining structure 20 close to the light emitting region is set, so that the reflection of the side surface of the pixel defining structure 20 close to the light emitting region to the external ambient light can be reduced to the greatest extent, and then the reflection of the external ambient light in the opening of the pixel defining structure 20 can be reduced, and the cathode 40 can be extended to the buffer region, so that the cathode 40 and the light emitting structure 30 can be fully and electrically connected with a reasonable buffer region width, and the light emitting function of the light emitting structure 30 can be ensured.

The reflective properties of the pixel defining structure 20 may also be defined or optimized in order to substantially reduce the reflection of external ambient light by the reduced reflection region. To this end, in an alternative embodiment, the present application further provides a display panel, wherein the surface reflectivity of the pixel defining structure 20 is below a preset reflectivity threshold.

Wherein the preset reflectivity threshold may be any one of 10% to 30%.

Illustratively, the pixel defining structure 20 may be made of a gray black low transmittance and low reflectivity material, and thus the surface reflectivity of the pixel defining structure 20 may be lower than 20%.

The embodiment of the application also considers that the hollow holes 41 are filled by the film packaging layer, so that insulation protection between the cathode wires 42 is realized, and structural protection is provided for the hollow hole 41 structure of the cathode 40. To this end, in an alternative embodiment, the present application further provides a display panel, further including: a thin film encapsulation layer between the cathode 40 and the color filter unit 50.

The thin film encapsulation layer may include a first inorganic layer 109 on a side close to the cathode 40, a second inorganic layer 107 on a side far from the cathode 40, and an inkjet printing layer 108 between the first inorganic layer 109 and the second inorganic layer 107. Wherein the inkjet printed layer 108 may be an organic layer.

Wherein, the film encapsulation layer fills the plurality of hollowed-out holes 41.

Specifically, the plurality of hollowed-out holes 41 may be filled by the first inorganic layer 109 in the thin film encapsulation layer.

Referring to fig. 7, fig. 7 is a schematic cross-sectional structure of a further display panel according to an embodiment of the present application. As shown in fig. 7, in order to implement a display panel with complete functions such as touch control and protection, the embodiment of the present application further exemplarily provides a display panel example, which includes:

the touch control layer is positioned between the film packaging layer and the color filter unit 50 or the black matrix 60, the outer coating 103 is positioned on the side of the color filter unit 50 or the black matrix 60 away from the cathode 40, and the cover plate 101 is positioned on the side of the outer coating 103 away from the color filter unit 50 or the black matrix 60.

The touch layer is used for realizing a touch sensing function, and may include a first insulating layer 106 close to one side of the thin film encapsulation layer, a second insulating layer 104 far away from one side of the thin film encapsulation layer, a touch graphic layer 105 located between the first insulating layer 106 and the second insulating layer 104, and a touch electrode 102.

The cover plate 101 may be used to form a protection of a display Module (MDL), and may be made of glass.

Through the above embodiments, the display panel provided by the present application can realize the following advantages:

(1) By arranging the hollow cathode 40 in the reflection reducing region around the light emitting region of the display panel, and the reflection reducing region can be opposite to the color filter unit 50 of the display panel adopting the COE technology, the reflection area of the cathode 40 in the reflection reducing region is reduced, the reflection of the display panel to external ambient light is reduced by utilizing the characteristic that the reflectivity of the pixel definition structure 20 is lower than that of the metal cathode 40, and the display effect of the display panel is improved.

(2) The reflection reducing region can cover a part of the side surface of the pixel defining structure 20, which is close to the light emitting region, so that the reflection of the side surface of the pixel defining structure 20 to external ambient light is reduced, the problem that the display panel has multiple rings of halations due to the color separation phenomenon in the display region is solved, and the display effect of the display panel is further improved.

(3) The hollowed-out holes 41 of the reflection reducing region and the cathode lead 42 are uniformly distributed around the light emitting region, and the influence on the electrical function of the cathode 40 can be reduced as little as possible.

Referring to fig. 8, fig. 8 is a flowchart illustrating steps of a method for manufacturing a display panel according to an embodiment of the present application. As shown in fig. 8, based on the same inventive concept, the present application further provides a method for manufacturing a display panel, including:

in step S601, a substrate 10 is provided.

In step S602, a pixel defining structure 20 is fabricated in the reflection reducing region on one side of the substrate 10.

In step S603, the light emitting structure 30 is fabricated in the light emitting areas surrounded by the reflection reducing areas and arranged in an array.

In step S604, a cathode 40 is fabricated on the side of the light emitting structure 30 and the pixel defining structure 20 away from the substrate 10.

The cathode 40 has a plurality of hollow holes 41 in the reflection reducing region, and cathode wires 42 disposed between every two adjacent hollow holes 41 at intervals.

The embodiment of the application can consider that the FMM mask process is directly utilized to complete the patterning manufacturing of the cathode. To this end, in an alternative embodiment, the present application also provides a method of obtaining a cathode 40 comprising:

based on the FMM Mask process, a cathode is obtained at the side of the light emitting structure and the pixel defining structure remote from the substrate.

The FMM Mask process may be a conventional metal Mask manufacturing process, which is a well-known method in the art and will not be described herein.

Optionally, the present application further provides an example of a manufacturing method for implementing a display panel, including:

in step S701, a substrate 10 is provided, and an Array film layer is fabricated on the back plate.

The Array film layer may include Polyimide (PI), a TFT circuit, a black pixel definition structure 20 (black PDL, BPDL), and a black support ((black photo spacer, BPS).

Step S702, on the structure obtained in step S801, electroluminescent material is evaporated in the light-emitting area by an FMM Mask process to obtain the light-emitting structure 30.

In step S703, the cathode 40 with the hollowed-out hole 41 and the cathode wire 42 in the reflection reducing region is fabricated on the substrate 10 by an oi process or an FMM Mask process.

In step S704, a first inorganic layer 109 (CVD 1), an inkjet printed layer 108 (IJP), and a second inorganic layer 107 (CVD 2) are sequentially formed on the cathode 40, thereby realizing thin film encapsulation. The first inorganic layer, the inkjet printed layer 108, and the second inorganic layer may be collectively referred to as a thin film encapsulation layer (TFE).

Wherein the first inorganic layer fills the hollowed-out hole 41.

In step S705, a touch sensing layer (TSP) is fabricated on the thin film encapsulation layer.

In step S706, a color filter (COE) is formed on the touch sensing layer.

The color filter film includes a plurality of color filter units 50 and a black matrix 60 arranged in an array.

After the color filter film is manufactured, the manufacturing of the display panel can be completed, and the obtained display panel is further used for manufacturing a subsequent display Module (MDL).

Based on the same inventive concept, the embodiment of the present application also provides a display device, including the display panel in the above embodiment or a display panel manufactured by using the method in the above embodiment.

Specifically, in view of the fact that the display panel in the above embodiment may be used to achieve enhancement of display effects of various display products, the display device may include products such as a smart watch, a mobile phone, a tablet computer, a display screen of a VR device, or a computer display.

Based on the same inventive concept, the embodiment of the application also provides a display device, which comprises the display device in the embodiment.

Specifically, in view of the fact that the display panel in the above embodiment may be used to achieve enhancement of display effects of various display products, the display device may include products such as a smart watch, a mobile phone, a tablet computer, a display, or a VR device.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices 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," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or terminal device comprising the element.

Finally, it should be further noted that specific examples are used herein to illustrate the principles and embodiments of the present application, and the above examples are only for aiding in understanding the technical solutions and core ideas of the present application. While preferred embodiments of the present embodiments have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the present application.

Claims

1. A display panel, comprising: the light-emitting device comprises a substrate, a plurality of light-emitting areas arranged on one side of the substrate in an array manner and reflection reducing areas surrounding the light-emitting areas;

2. The display panel of claim 1, wherein the light emitting region further comprises: the color filter unit is positioned at one side of the cathode far away from the light-emitting structure;

3. The display panel of claim 2, further comprising: light shielding areas arranged between adjacent reflection reducing areas at intervals;

4. The display panel of claim 3, wherein the plurality of hollowed-out holes and the cathode lead extend to the light shielding region between the black matrix and the pixel defining structure.

5. The display panel of claim 1, wherein the hollowed-out holes are fan-shaped and arranged in an array around the light emitting structure;

6. The display panel of claim 5, wherein the hollowed-out hole comprises: a plurality of first fan ring apertures and a plurality of second fan ring apertures;

7. The display panel according to claim 1, wherein an angle formed between a surface of the pixel defining structure on a side close to the light emitting structure and a surface of the light emitting structure on a side far from the substrate is greater than 90 ° and less than 180 °;

8. The display panel of claim 7, wherein a ratio between a width of an overlap of an orthographic projection of the light emitting region onto the substrate and an orthographic projection of a side of the pixel defining structure adjacent to the light emitting structure onto the substrate along a direction of the light emitting region toward the light emitting region is greater than 1/3 and less than 1/2.

9. The display panel of claim 1, wherein a surface reflectivity of the pixel defining structure is below a preset reflectivity threshold.

10. The display panel of claim 1, further comprising: a thin film encapsulation layer between the cathode and the color filter unit;

wherein, the film packaging layer fills the plurality of hollowed-out holes.

11. A method for manufacturing a display panel, comprising:

providing a substrate;

12. The method of claim 11, wherein the step of obtaining a cathode on a side of the light emitting structure and the pixel defining structure away from the substrate comprises:

13. A display device, comprising: a display panel according to any one of claims 1 to 10 or a display panel produced by a method according to claim 11 or 12.