CN117641993A - Display substrate, display panel and display device - Google Patents

Abstract

The application provides a display substrate, a display panel and a display device, and solves the problem that residual substances exist in a light-emitting area corresponding to a first electrode. The display substrate comprises an array substrate and a display functional layer, the display functional layer comprises a plurality of light emitting devices and a first pixel definition layer, the light emitting devices are positioned on the array substrate, the light emitting devices comprise first electrodes, the light emitting functional layer and second electrodes, the first electrodes are stacked on the array substrate, and the first pixel definition layer is positioned on one side, away from the array substrate, of the first electrodes; the second pixel definition layer at least partially covers the first pixel definition layer, the light-emitting function layer is positioned in a pixel opening formed in the second pixel definition layer, the second pixel definition layer separates the first pixel definition layer from the light-emitting function layer, and the extinction coefficient of the second pixel definition layer is smaller than that of the first pixel definition layer. Therefore, the phenomenon that the corresponding light-emitting area on the first electrode has residual substances is improved, the reflectivity of the surface of the first electrode is improved, and the light-emitting efficiency is improved.

Description

Display substrate, display panel and display device

Technical Field

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

Background

An Organic Light-Emitting Diode (OLED) technology is currently used as a main technology in the field of high-end display products (such as mobile phone screens, television and computer screens, flat panel screens, vehicle-mounted displays and the like) in the market, so that the high-end display products have a series of advantages of flexibility, foldability, thinness, wide color gamut and the like. The preparation process of the light-emitting layer of the OLED is high-vacuum evaporation, namely, the organic micromolecular material is heated in a high-vacuum environment to be deposited on the backboard.

At present, when an Organic Electro-Luminescence (OEL) device is manufactured, a pixel defining layer having light absorption properties is formed on a pixel surface, and the pixel defining layer having light absorption properties is easily left on a first electrode, which affects light extraction efficiency.

Disclosure of Invention

In view of this, the embodiments of the present application provide a display substrate, a display panel and a display device, so as to solve the problem that the corresponding light-emitting area on the first electrode has residual substances in the prior art, and improve the light-emitting efficiency.

The first aspect of the present application provides a display substrate, including an array substrate, a display function layer, and a second pixel definition layer. The display function layer comprises a plurality of light emitting devices and a first pixel definition layer, wherein the light emitting devices are arranged on the array substrate, the light emitting devices comprise a first electrode, a light emitting function layer and a second electrode, the first electrode, the light emitting function layer and the second electrode are stacked on the array substrate, and the first pixel definition layer is arranged on one side, away from the array substrate, of the first electrode. In addition, at least part of the second pixel definition layer is covered on the first pixel definition layer, the light emitting function layer is positioned in a pixel opening formed in the second pixel definition layer, the second pixel definition layer separates the first pixel definition layer from the light emitting function layer, and the extinction coefficient of the second pixel definition layer is smaller than that of the first pixel definition layer.

Optionally, in an embodiment of the application, the extinction coefficient of the second pixel defining layer is smaller than a preset coefficient, preferably the extinction coefficient of the second pixel defining layer is larger than 0 and smaller than 0.0001.

Optionally, in an embodiment of the application, the display substrate further includes: the reflection structure is positioned on one side of the second pixel definition layer, which is away from the array substrate, and at least part of light rays are close to the positive viewing angle direction through the reflection structure.

Optionally, in an embodiment of the application, the display substrate further includes: the packaging structure is overlapped on the second electrode and used for packaging the first pixel definition layer and the second pixel definition layer; and the focusing filter structure is covered on the packaging structure and focuses at least part of light rays emitted from the packaging structure so as to make at least part of light rays emitted from the packaging structure approach to the positive viewing angle direction.

Optionally, in an embodiment of the application, the focusing filter structure includes: the focusing structure covers a partial area of the packaging structure, and orthographic projection of the focusing structure on the packaging structure is not overlapped with orthographic projection of the light-emitting functional layer on the packaging structure; and a wavelength filter layer covering at least the focusing structure and having a coverage consistent with that of the encapsulation structure, the wavelength of the light allowed to pass through the wavelength filter layer being consistent with that corresponding to the light-emitting functional layer, wherein the refractive index of the wavelength filter layer is greater than that of the focusing structure.

Optionally, in an embodiment of the application, the thickness of the wavelength filtering layer is greater than or equal to 2um and less than or equal to 3um.

Alternatively, in the embodiments of the application, the focusing structures are microlens structures.

Optionally, in an embodiment of the application, the wavelength filtering layer includes: and a plurality of scattering particles dispersed in the wavelength filter layer, the scattering particles gathering at least part of light irradiated into the wavelength filter layer toward the positive viewing angle direction, preferably the scattering particles include Zr element, and the plurality of scattering particles have the same size.

The second aspect of the present application also provides a display panel, the display panel comprising: the display substrate.

The third aspect of the present application also provides a display device, including: the display panel.

According to the technical scheme provided by the embodiment of the application, the extinction coefficient of the second pixel definition layer is smaller than that of the first pixel definition layer, the light absorption capacity of the second pixel definition layer is smaller than that of the first pixel definition layer, no or little residual substances exist on the first electrode, and no or little residual substances exist in a light-emitting area of the second pixel definition layer; the second pixel defining layer separates the first pixel defining layer from the light emitting area, i.e. separates the first pixel defining layer from the light emitting functional layer, so that the light emitting area is free of residual material of the first pixel defining layer. Therefore, the phenomenon that the corresponding light-emitting area on the first electrode has residual substances is improved, the reflectivity of the surface of the first electrode is improved, the microcavity is enhanced, and the light-emitting efficiency is improved.

Additional features and advantages of the present application will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate the application and, together with the description, do not limit the application. In the drawings:

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

fig. 2 is a schematic view of a display substrate according to a first embodiment of the present application;

FIG. 3 is a schematic view of a display substrate according to a second embodiment of the present disclosure;

fig. 4 is a schematic view of a display substrate according to a third embodiment of the present application;

fig. 5 is a schematic view of a display substrate according to a fourth embodiment of the present disclosure;

FIG. 6 is a schematic view of a display substrate according to a fifth embodiment of the present disclosure;

fig. 7 is a schematic view of a display substrate according to a sixth embodiment of the present application;

fig. 8 is a schematic view of a display substrate according to a seventh embodiment of the present application;

fig. 9 is a schematic view of a display substrate according to an eighth embodiment of the present disclosure;

fig. 10 is a schematic view of a display substrate provided in a ninth embodiment of the present application;

fig. 11 is a schematic view of a display substrate according to a tenth embodiment of the present application;

fig. 12 is a schematic view of a display substrate according to a tenth embodiment of the present application;

fig. 13 is a schematic view of a display substrate according to an eleventh embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described 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.

An OLED is a current-type organic light emitting device, which is a phenomenon of emitting light by injection and recombination of carriers, and the intensity of the light emission is proportional to the current injected. Under the action of an electric field, holes generated by the anode and electrons generated by the cathode of the OLED move, are respectively injected into the hole transport layer and the electron transport layer, and migrate to the light emitting layer. When an electron and a hole meet at the light emitting layer, an energy exciton is generated, thereby exciting a light emitting molecule to finally generate visible light.

The OLED includes parts of a substrate, a cathode, an anode, a Hole Injection Layer (HIL), an Electron Injection Layer (EIL), a Hole Transport Layer (HTL), an Electron Transport Layer (ETL), an Electron Blocking Layer (EBL), a Hole Blocking Layer (HBL), an emission layer (EML), and the like. Wherein the substrate is the basis of the whole device, and all functional layers need to be evaporated on the substrate of the device. Glass is typically used as the substrate for the device. However, if it is desired to make a flexible OLED that is bendable, it is desirable to use other materials such as plastics or the like as the substrate of the device.

The anode is connected with the positive electrode of the externally applied driving voltage of the device, holes in the anode can move towards the light-emitting layer in the device under the drive of the externally applied driving voltage, and the anode needs to have certain light transmittance when the device works, so that light emitted from the inside of the device can be observed by the outside. The most commonly used material for the anode is ITO.

The light emission process of the OLED can be divided into: injection of electrons and holes, transport of electrons and holes, recombination of electrons and holes, and de-excitation light of excitons.

The hole injection layer can modify the anode of the device and can enable holes from the anode to be smoothly injected into the hole transport layer. The hole transport layer is responsible for transporting holes to the light emitting layer. The electron blocking layer blocks electrons from the cathode at the light emitting layer interface of the device, increasing the concentration of electrons at the light emitting layer interface of the device. The light emitting layer is where device electrons and holes recombine to form excitons, which then de-excite light. The hole blocking layer can block holes from the anode at the interface of the light-emitting layer of the device, so that the probability of recombination of electrons and holes at the interface of the light-emitting layer of the device is improved, and the light-emitting efficiency of the device is increased. The electron transport layer is responsible for transporting electrons from the cathode into the light emitting layer of the device. The electron injection layer serves to modify the cathode and transport electrons to the electron transport layer. Electrons in the cathode move toward the light-emitting layer of the device under the drive of an applied driving voltage of the device, and then recombine with holes from the anode at the light-emitting layer.

There are many kinds of materials for the respective functional layers. The electron transport layer is mainly composed of Alq3, and the electron injection layer 1025 is mainly composed of lithium fluoride (LiF) and aluminum oxide (Al ₂ O ₃ ) Etc.

At present, when an Organic Electro-Luminescence (OEL) device is manufactured, after an anode is formed on a substrate, a pixel defining layer having a light absorption property is formed on a pixel surface in order to reduce reflection of ambient light and improve diffraction spots. However, compared with the common pixel definition layer, the pixel definition layer with the light absorption property is easy to remain at the anode due to the material, and residual substances are positioned at the pixel luminous functional layer, so that the reflectivity of the anode surface is reduced, thereby weakening the microcavity and further affecting the light-emitting efficiency. In the prior art, after the anode covers the pixel definition layer, laser plasma is generally used for processing, the energy of the laser plasma is not easy to control, and the influence of process fluctuation is large.

FIG. 1 is a schematic diagram of a display substrate in the prior art. The display substrate includes an array substrate 10 and a display function layer 11. The display function layer 11 is located on the array substrate 10. The display function layer 11 includes a plurality of light emitting devices 111 and a first pixel defining layer 112 on the array substrate 10. The first pixel defining layer 112 is a pixel defining layer having light absorbing properties. The light emitting device 111 includes a first electrode 1111, a light emitting functional layer 1112, and a second electrode 1113 stacked on the array substrate 10. The light emitting function layer 1112 is located in the pixel opening formed in the first pixel defining layer 112. Since the first pixel defining layer 112 has a light absorbing property, there is a residual material on the first electrode 1111 as shown by black squares in fig. 1. The residual substances cause the reduction of the reflectivity of the surface of the first electrode, weaken the microcavity and influence the light-emitting efficiency.

The embodiments of the present application provide solutions to the problem of the first electrode having residual material.

In a first aspect, embodiments of the present application provide a display substrate.

Fig. 2 is a display substrate provided in the first embodiment of the present application. As shown in fig. 2, the display substrate includes an array substrate 10 and a display function layer 11. The display function layer 11 is located on the array substrate 10. The display function layer 11 includes a plurality of light emitting devices 111 and a first pixel defining layer 112 on the array substrate 10. The first pixel defining layer 112 is a pixel defining layer having light absorbing properties. The light emitting device 111 includes a first electrode 1111, a light emitting function layer 1112, and a second electrode 1113 sequentially stacked on the array substrate 10. Alternatively, in the present embodiment, the first electrode 1111 is an anode and the second electrode 1113 is a cathode.

As shown in fig. 2, the display substrate further includes a second pixel defining layer 113. The second pixel defining layer 113 is located on a side of the first pixel defining layer 112 facing away from the array substrate 10, and covers at least a partial area of the first pixel defining layer 112. The second pixel defining layer 113 separates the first pixel defining layer 112 from the light emitting functional layer 1112, and the light emitting functional layer 1112 is located in a pixel opening formed in the second pixel defining layer 113. The extinction coefficient of the second pixel defining layer 113 is smaller than that of the first pixel defining layer 112. The smaller the extinction coefficient of the second pixel defining layer 113 is, the better. For example, the extinction coefficient of the second pixel defining layer 113 may be infinitely close to 0, which has almost no light absorption characteristic, and does not remain at the first electrode when etching using laser plasma. Optionally, in an embodiment of the present application, the extinction coefficient of the second pixel defining layer is smaller than a preset coefficient. The preset coefficient may be a number infinitely close to 0, for example, the preset coefficient is 0.0002. Preferably, the extinction coefficient of the second pixel defining layer 113 is greater than 0 and less than 0.0001. Preferably, the extinction coefficient of the second pixel defining layer 113 is 0.00005. Alternatively, in the embodiment of the present application, the extinction coefficient of the first pixel defining layer 112 is greater than 0 and less than 0.2.

According to the technical solution provided in the embodiment of the present application, the extinction coefficient of the second pixel defining layer 113 is smaller than that of the first pixel defining layer 112, the light absorption capacity of the second pixel defining layer 113 is smaller than that of the first pixel defining layer 112, no or little residue exists in the first electrode 1111, and no or little residue exists in the light emitting region due to the second pixel defining layer 113; the second pixel defining layer 113 spaces the first pixel defining layer 112 from the light emitting functional layer 1112, that is, separates the first pixel defining layer 112 from the light emitting functional layer such that the light emitting region is free of residual materials of the first pixel defining layer 112. Thus, the phenomenon that the corresponding light emitting region on the first electrode 1111 has residual substances is improved, so that the reflectivity of the surface of the first electrode 1111 is increased, and the microcavity is enhanced, thereby improving the light emitting efficiency.

Alternatively, in the embodiment of the application, the refractive index of the second pixel defining layer 113 is smaller than the refractive index of the first pixel defining layer 112. Alternatively, in the present example, the refractive index n1 of the first pixel defining layer 112 is about 1.66, and the refractive index n2 of the second pixel defining layer 113 is about 1.60.

Fig. 3 is a schematic view of a display substrate according to a second embodiment of the present application. The display substrate shown in fig. 3 is different from the display substrate shown in fig. 2 in that in the present embodiment, the display substrate further includes: a reflective structure 12. The side of the second pixel defining layer 113 facing away from the array substrate 10 includes a first portion surrounding the pixel opening and a second portion outside the pixel opening. As shown in fig. 3, the reflective structure 12 is located in the second portion. The reflective structure 12 is regular triangular in cross-section. The reflecting structure 12 brings at least part of the light rays impinging on the reflecting structure 12 close to the normal viewing angle direction by primary reflection, as shown by the light path indicated by the arrow in fig. 3. The front view direction is a direction perpendicular to the array substrate 10.

Alternatively, in embodiments of the present application, the reflective structure 12 is located in the second portion and near the junction of the first and second portions. In this position, the reflective structure 12 can reflect light to the maximum extent, so that more light approaches toward the positive viewing angle.

Fig. 4 is a schematic view of a display substrate according to a third embodiment of the present application. The display substrate shown in fig. 4 differs from the display substrate shown in fig. 3 in that in the present embodiment the reflective structure 12 is located on a first portion of the second pixel defining layer 113. At least some of the light rays are brought together in the forward viewing direction by the reflecting structure 12, as indicated by the light path indicated by the arrow in fig. 4.

Fig. 5 is a schematic view of a display substrate according to a fourth embodiment of the present application. The display substrate shown in fig. 5 differs from the display substrate shown in fig. 3 in that in the present embodiment, the reflective structure 12 has a trapezoid cross section.

Fig. 6 is a schematic view of a display substrate according to a fifth embodiment of the present application. The display substrate shown in fig. 6 is different from the display substrate shown in fig. 3 in that in the present embodiment, the reflective structure 12 has a multi-step shape in cross section.

Fig. 7 is a schematic view of a display substrate according to a sixth embodiment of the present application. The display substrate shown in fig. 7 is different from the display substrate shown in fig. 3 in that in the present embodiment, the cross section of the reflective structure 12 is in a shape having a plurality of oblique sides on one side and being concave. Wherein the plurality of oblique sides have different slopes, and the slopes of the plurality of oblique sides become gradually larger as they are away from the second pixel defining layer 113. The reflecting structure 12, which includes a plurality of hypotenuses in cross section, brings light rays closer to the forward viewing angle direction by one reflection or multiple reflections. The reflection paths of the light rays are increased by the multiple oblique sides, so that the light rays can be closer to the direction of the front viewing angle, and the light emitting efficiency is further improved.

In this embodiment of the present application, at least some light rays are drawn close to the forward viewing angle direction by the emission structure 12, so that the probability that the at least some light rays reach the forward viewing angle can be increased, thereby further improving the light extraction efficiency and reducing the power consumption. In addition, the number and location of the reflective structures 12 are not limited in the embodiments of the present application.

Fig. 8 is a schematic view of a display substrate according to a seventh embodiment of the present application. The display substrate shown in fig. 8 is different from the display substrate shown in fig. 2 in that in the present embodiment, the display substrate further includes: a package structure 13 and a focus filter structure 14. The package structure 13 is stacked on the second electrode 1113. The focusing filter structure 14 is overlaid on the encapsulation structure 13. The package structure 13 protects the light emitting function layer 1112 from light emission, which is not changed, from being corroded or affected by substances above the package structure 13. The focusing filter structure 14 focuses at least a portion of the light rays exiting the package structure such that at least a portion of the light rays exiting the package structure converge toward the positive viewing angle. The focusing filter structure 14 also allows only light rays having a wavelength corresponding to the wavelength of the light emitting functional layer 1112 to pass through.

By using the focusing filter structure 14, at least part of the light rays emitted from the packaging structure 13 are close to the normal direction of the positive viewing angle, so that the probability that the at least part of the light rays reach the positive viewing angle is increased, and the light extraction efficiency is further improved. By filtering the light using the focusing filter structure 14, it is ensured that only the light emitted by the light emitting functional layer 1112 can reach into the viewing angle.

Fig. 9 is a schematic view of a display substrate according to an eighth embodiment of the present application. The display substrate shown in fig. 9 differs from the display substrate shown in fig. 8 in that in the present embodiment, the focus filter structure 14 includes a focus structure 141 and a wavelength filter layer 142. The focusing structure 141 has a trapezoidal cross section.

The refractive index of the wavelength filtering layer 142 is greater than the refractive index of the focusing structure 141. By setting the refractive index of the wavelength filtering layer 142 to be larger than that of the focusing structure 141, the light rays emitted from the focusing structure 141 to the wavelength filtering layer 142 can be close to a positive viewing angle, the probability that the light rays emitted from the focusing structure 141 to the wavelength filtering layer 142 reach the positive viewing angle is increased, and the light emitting efficiency is improved; alternatively, a portion of the light directly irradiated onto the focusing structure 141 from the package structure 13 may be totally reflected, so as to increase the probability that the portion of the light reaches the front view angle direction, and improve the light extraction efficiency.

The focusing structure 141 covers a partial area of the encapsulation structure 13. But does not cover the area of the package structure 13 corresponding to the light emitting function layer 1112. The front projection of the focusing structure 141 onto the encapsulation structure 13 does not overlap with the front projection of the light emitting functional layer 1112 onto the encapsulation structure 13. The focusing structure 141 focuses light rays exiting from the package structure 13 and impinging on the focusing structure 141 by refraction or reflection. As shown by the light path indicated by the arrow in fig. 5, the focusing structure 141 focuses the light by reflection or refraction so that the light is drawn toward the front view. The microlens structure 141 focuses at least part of the light emitted from the package structure 13, so that the at least part of the light approaches toward the positive viewing angle direction, and the light extraction efficiency is further improved. Alternatively, in an embodiment of the present invention, the focusing structure 141 may be a microlens structure, for example.

The wavelength filter layer 142 covers at least the focusing structure 141. The coverage of the wavelength filtering layer 142 is consistent with the coverage of the package structure 13, in other words, the orthographic projection of the wavelength filtering layer 142 on the array substrate 10 coincides with the orthographic projection of the package structure 13 on the array substrate 10. The wavelength filter layer 142 allows the wavelength of light passing therethrough to coincide with the wavelength corresponding to the light emitting function layer 1112. The wavelength filtering layer 142 may be any structure capable of filtering specific wavelengths. Specifically, the wavelength filtering layer 142 is a color glue, and realizes the functions of wavelength selection and filtering through different proportion ratios of the color elements.

The wavelength filter layer 142 filters light so that only light having a wavelength corresponding to the wavelength of the light-emitting functional layer 1112 passes therethrough. The wavelength corresponding to the light emitting function layer 1112 is the wavelength of the light emitted by the light emitting function layer 1112. In addition, a wavelength filter layer 142 is used, and the wavelength filter layer 142 is used instead of the polarizer. Compared with the polarizer, the overall thickness of the screen body can be reduced, and the folding performance is improved. Alternatively, the thickness of the wavelength filtering layer 142 may be greater than or equal to 2um and less than or equal to 3um. Preferably, the thickness of the wavelength filtering layer 142 is 2.7um.

The focusing filter structure 14 is implemented by the focusing structure 141 and the wavelength filtering layer 142, so that the focusing filter structure 14 is obtained by facilitating the process operation.

Fig. 10 is a schematic view of a display substrate according to a ninth embodiment of the present application. The display substrate shown in fig. 10 is different from the display substrate shown in fig. 9 in that in the present embodiment, the sectional shape of the focusing structure 141 is a regular triangle. As shown in fig. 10, the focusing structure 141 reflects or refracts the light emitted from the package structure 13 and irradiated on the focusing structure 141, so that the light approaches toward the positive viewing angle direction to focus the light.

Fig. 11 is a schematic view of a display substrate according to a tenth embodiment of the present application. The display substrate shown in fig. 11 is different from the display substrate shown in fig. 9 in that in the present embodiment, the sectional shape of the focusing structure 141 is stepped. As shown in fig. 11, the focusing structure 141 refracts or refracts and reflects the light emitted from the package structure 13 and irradiated on the focusing structure 141, so that the light approaches toward the positive viewing angle direction to focus the light. In addition, when the first slope of the focusing structure 141 is relatively inclined, light directly irradiated on the first slope may be totally reflected so that the light approaches toward the positive viewing angle.

Fig. 12 is a schematic view of a display substrate according to an eleventh embodiment of the present application. The display substrate shown in fig. 12 differs from the display substrate shown in fig. 9 in that in the present embodiment, the display substrate further includes a plurality of scattering particles 15. A plurality of scattering particles 15 are dispersed in the wavelength filtering layer 142. The scattering particles 15 gather at least part of the light rays that strike the wavelength filter layer 142 in the forward viewing direction, as shown by the light path indicated by the arrow in fig. 12. The scattering particles 15 may be any particles capable of scattering. For example, the scattering particles 15 include Zr element. Further, the plurality of scattering particles 15 are the same size.

By dispersing the scattering particles 15 in the wavelength filtering layer 142, the scattering particles 15 scatter at least part of the light irradiated into the wavelength filtering layer 142, so that at least part of the light irradiated into the wavelength filtering layer 142 approaches to the direction of the positive viewing angle, the probability that the at least part of the light reaches the positive viewing angle is increased, and the light extraction efficiency is further improved.

Fig. 13 is a schematic view of a display substrate according to a twelfth embodiment of the present application. The display substrate shown in fig. 13 is different from the display substrate shown in fig. 8 in that in the present embodiment, the display substrate further includes an organic gel 16. The organic gel 16 is located on the side of the focusing filter structure 14 facing away from the array substrate 10.

In summary, the display substrate provided in the embodiments of the present application mainly includes the following two points. 1) Different pixel definition layer structures are matched and designed, and the pixel definition layer without light absorption characteristics is used for improving the residual problem of the pixel definition layer made of light absorption materials in the pixel light-emitting area of the first electrode, so that the light-emitting efficiency is improved. 2) The micro lens structure, the wavelength filter layer and the scattering particles are matched and designed, and the special structural design is utilized to improve the light emitting efficiency. The micro-lens structure and the wavelength filter layer are combined into the self-focusing lens, and the self-focusing lens is prepared on the packaging structure, so that more emergent light reaches the positive viewing angle, and the effects of enhancing the emergent light of the positive viewing angle and improving the optical directivity are achieved. The upstream product corresponding to the display substrate provided in the embodiment of the present application may be a mask or other materials. For downstream products corresponding to the display substrate provided by the embodiment of the application, the rainbow phenomenon can be improved, and visual enjoyment is improved.

In a second aspect, embodiments of the present application further provide a display panel, including: the display substrate described in the above embodiment.

In a third aspect, embodiments of the present application further provide a display device, including: the display panel described in the above embodiment.

The display device is a product with an image display function. For example, the display device may be used to display still images, such as pictures or photographs. The display device may also be used to display dynamic images, such as video.

The display device may be a notebook computer, mobile phone, hand-held or portable computer, camera, video camera, on-board intelligent central control screen, calculator, smart watch, GPS navigator, electronic photo, electronic billboard or sign, projector, etc.

In addition, the display device can also have the functions of photographing, video recording, fingerprint identification, face recognition and the like.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above 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 only represent a few embodiments of the present specification, which are described in more 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 present description, which is within the scope of the present description. Accordingly, the protection scope of the patent should be determined by the appended claims.

Claims (10)

1. A display substrate, comprising:

an array substrate;

the display function layer comprises a plurality of light emitting devices and a first pixel definition layer, wherein the light emitting devices are positioned on the array substrate, the light emitting devices comprise a first electrode, a light emitting function layer and a second electrode which are superposed on the array substrate, and the first pixel definition layer is positioned on one side of the first electrode, which is away from the array substrate; and

the second pixel definition layer at least partially covers the first pixel definition layer, the light-emitting function layer is located in a pixel opening formed in the second pixel definition layer, the second pixel definition layer separates the first pixel definition layer from the light-emitting function layer, and the extinction coefficient of the second pixel definition layer is smaller than that of the first pixel definition layer.

2. A display substrate according to claim 1, wherein the extinction coefficient of the second pixel defining layer is smaller than a preset coefficient, preferably the extinction coefficient of the second pixel defining layer is larger than 0 and smaller than 0.0001.

3. The display substrate of claim 1, wherein the display substrate further comprises:

and the reflection structure is positioned at one side of the second pixel definition layer, which is away from the array substrate, and at least part of light rays are close to the positive viewing angle direction through the reflection structure.

4. The display substrate of claim 1, wherein the display substrate further comprises:

a package structure stacked on the second electrode; and

the focusing filter structure is covered on the packaging structure and focuses at least part of light rays emitted from the packaging structure, so that at least part of light rays emitted from the packaging structure are close to a positive viewing angle direction.

5. The display substrate of claim 4, wherein the focus filter structure comprises:

a focusing structure, wherein the focusing structure covers a partial area of the packaging structure, and the orthographic projection of the focusing structure on the packaging structure is not overlapped with the orthographic projection of the luminous functional layer on the packaging structure; and

and the wavelength filter layer at least covers the focusing structure, the coverage area is consistent with that of the packaging structure, the wavelength of light allowed to pass through the wavelength filter layer is consistent with that corresponding to the light-emitting functional layer, and the refractive index of the wavelength filter layer is larger than that of the focusing structure.

6. The display substrate of claim 5, wherein the thickness of the wavelength filtering layer is greater than or equal to 2um and less than or equal to 3um.

7. The display substrate of claim 5, wherein the focusing structures are microlens structures.

8. The display substrate of claim 5, wherein the wavelength filtering layer comprises:

and a plurality of scattering particles dispersed in the wavelength filter layer, the scattering particles gathering at least part of light irradiated into the wavelength filter layer toward a positive viewing angle direction, preferably the scattering particles include Zr elements, and the plurality of scattering particles have the same size.

9. A display panel, the display panel comprising:

the display substrate of any one of claims 1-8.

10. A display device, characterized in that the display device comprises:

the display panel of claim 9.