CN114843418A

CN114843418A - Display panel and display device

Info

Publication number: CN114843418A
Application number: CN202210406703.9A
Authority: CN
Inventors: 严峻; 郭林山; 柳家娴
Original assignee: Wuhan Tianma Microelectronics Co Ltd
Current assignee: Wuhan Tianma Microelectronics Co Ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-08-02

Abstract

The invention discloses a display panel and a display device, which belong to the technical field of display, wherein the display panel comprises a substrate, an anode layer, a pixel definition layer, a light emitting layer and a reversible color changing layer, wherein the anode layer comprises a plurality of anodes, the pixel definition layer comprises a plurality of openings, the orthographic projection of the openings on the substrate is overlapped with the orthographic projection of the anodes on the openings, at least part of the anodes are exposed out of the openings, the light emitting layer comprises a plurality of light emitting parts, the light emitting parts are positioned in the openings, the reversible color changing layer comprises a first state and a second state, the transmittance of the reversible color changing layer in the first state is different from that of the reversible color changing layer in the second state, and the transmittance of the reversible color changing layer in the first state is smaller than that of the pixel definition layer; the reversible color changing layer comprises a plurality of first parts, and the first parts are at least positioned between two adjacent openings along the direction parallel to the plane of the substrate. The display device comprises the display panel. The invention can reduce the reflectivity of the display panel when the display panel is not lighted.

Description

Display panel and display device

Technical Field

The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.

Background

The Organic Light Emitting display device is also called an Organic Light-Emitting Diode (OLED) Organic Light Emitting Diode (OLED) display device, and compared with a liquid crystal display device, the OLED display device has the advantages of self-luminescence, wide viewing angle, high contrast, low power consumption, extremely high response speed, ultra-Light and thin weight, flexible display, flexible screen curling, strong temperature adaptability, simple manufacturing process and the like, and has become a research hotspot in the technical field of photoelectric display.

In the prior art, because the OLED device structure usually employs a reflective electrode, such as a cathode or an anode, when the display screen is not lighted, and after external ambient light irradiates the reflective electrode, the reflective electrode reflects the light back, and particularly, the reflective electrode is mostly made of metal and has a high reflectivity, thereby reducing the use effect of the display device. The current practice in the industry is to add a polarizer structure above the light-emitting surface of the OLED device to improve the reflection, but the cost is high, and the problems of low transmittance during display, poor display effect, thick thickness, poor flexibility and the like exist.

Accordingly, it is an urgent need to provide a display panel and a display device that can reduce the reflectance in a dark state and avoid affecting the display effect in displaying.

Disclosure of Invention

In view of the above, the present invention provides a display panel and a display apparatus, so as to solve the problems of the prior art that the display device has high reflectivity in a dark state, low transmittance in a bright display, and influence on the display quality.

The invention discloses a display panel, comprising: a substrate; an anode layer on one side of the substrate, the anode layer including a plurality of anodes; the pixel defining layer is positioned on one side of the anode layer, which is far away from the substrate, and comprises a plurality of openings, the orthographic projections of the openings on the substrate are overlapped with the orthographic projections of the anodes on the openings, and at least part of the anodes are exposed out of the openings; the light-emitting layer is positioned on one side, away from the substrate, of the pixel defining layer and comprises a plurality of light-emitting parts, and the light-emitting parts are positioned in the openings; the reversible color changing layer is positioned on one side, away from the substrate, of the anode layer and comprises a first state and a second state, the transmittance of the reversible color changing layer in the first state is different from that in the second state, and the transmittance of the reversible color changing layer in the first state is smaller than that of the pixel defining layer; the reversible color changing layer comprises a plurality of first parts, and the first parts are at least positioned between two adjacent openings along the direction parallel to the plane of the substrate.

Based on the same inventive concept, the invention also discloses a display device, which comprises the display panel.

Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:

the display panel comprises a reversible color changing layer, the reversible color changing layer is positioned on one side, away from a substrate, of an anode layer, the reversible color changing layer comprises a first state and a second state, the transmittance of the reversible color changing layer in the first state is different from that in the second state, the reversible color changing layer is made of reversible and color-changeable materials, the reversible color changing layer forms different transmittances in different states, the reversible color changing layer can be used for shading due to low transmittance, and the reversible color changing layer can be used for transmitting light due to high transmittance. The transmittance of the reversible color changing layer in the first state is lower than that of the pixel defining layer, and the reversible color changing layer in the first state has lower transmittance than that of the pixel defining layer, so that the reversible color changing layer can play a role in shading. The reversible color-changing layer comprises a plurality of first parts, the first parts are at least positioned between two adjacent openings of the pixel defining layer along the direction parallel to the plane of the substrate, and the transmittance of the first parts in the first state is smaller than that of the pixel defining layer, so that the first parts in the first state can be at least shielded in an area where the anode and the light emitting part in the openings are not overlapped, and when external ambient light irradiates on the first parts, the external ambient light can be absorbed by the first parts with low transmittance instead of being reflected, so that the reflection phenomenon caused by the fact that the external ambient light irradiates on the anode in the area can be avoided, and the reduction of the reflectivity of the display panel when the display panel is not lightened is facilitated.

Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention;

FIG. 2 is a schematic sectional view taken along line A-A' of FIG. 1;

FIG. 3 is a schematic view of another cross-sectional structure taken along line A-A' of FIG. 1;

FIG. 4 is a schematic view of another cross-sectional structure taken along line A-A' of FIG. 1;

FIG. 5 is a schematic view of another cross-sectional structure taken along line A-A' of FIG. 1;

FIG. 6 is a schematic view of another cross-sectional structure taken along line A-A' of FIG. 1;

FIG. 7 is a schematic diagram of another planar structure of a display panel according to an embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view taken along line B-B' of FIG. 7;

FIG. 9 is an enlarged partial schematic view of the region M in FIG. 7;

FIG. 10 is a schematic view of an alternative cross-sectional configuration taken along line B-B' of FIG. 7;

FIG. 11 is another enlarged partial view of the region M in FIG. 7;

FIG. 12 is a schematic view of the reversible color shifting layer of FIG. 11;

FIG. 13 is another enlarged partial view of the region M in FIG. 7;

FIG. 14 is another enlarged partial view of the region M in FIG. 7;

FIG. 15 is an enlarged partial schematic view of region F of FIG. 7;

fig. 16 is a schematic plan view of a display device according to an embodiment of the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Referring to fig. 1 to fig. 3 in combination, fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention, fig. 2 is a schematic sectional view along a direction a-a 'in fig. 1, fig. 3 is a schematic sectional view along a direction a-a' in fig. 1, and a display panel 000 according to an embodiment of the present invention includes:

a substrate 10;

an anode layer 20, the anode layer 20 being positioned at one side of the substrate 10, the anode layer 20 including a plurality of anodes 201;

a pixel defining layer 30, the pixel defining layer 30 being located on a side of the anode layer 20 facing away from the substrate 10, the pixel defining layer 30 including a plurality of openings 30K, an orthographic projection of the openings 30K on the substrate 10 overlapping an orthographic projection of the anode 201 on the substrate 10, the openings 30K exposing at least a portion of the anode 201;

a light-emitting layer 40, the light-emitting layer 40 being located on a side of the pixel defining layer 30 away from the substrate 10, the light-emitting layer 40 including a plurality of light-emitting portions 401, the light-emitting portions 401 being located in the openings 30K;

a reversible color changing layer 50, the reversible color changing layer 50 being located on a side of the anode layer 20 facing away from the substrate 10, the reversible color changing layer 50 including a first state and a second state, a transmittance of the reversible color changing layer 50 in the first state being different from a transmittance of the reversible color changing layer 50 in the second state, the transmittance of the reversible color changing layer 50 in the first state being smaller than the transmittance of the pixel defining layer 30;

the reversible color-changing layer 50 includes a plurality of first portions 501, and the first portions 501 are located at least between two adjacent openings 30K in a direction X parallel to the plane of the substrate 10.

Specifically, the display panel 000 provided in this embodiment may be an Organic Light Emitting Diode (OLED) display panel, where the display panel 000 includes a substrate 10 (not filled in the drawing), and the substrate 10 is used as a carrier substrate for providing other film structures of the display panel 000; optionally, the substrate 10 may be a hard material such as glass, ceramic, or a flexible material such as a polymer material such as Polyimide (PI), Polycarbonate (PC), Polyethersulfone (PES), polyethylene terephthalate (PET), or polyethylene naphthalate (PEN), and the substrate 10 may be any one of a transparent substrate, a translucent substrate, or an opaque substrate, which is not limited in this embodiment. Alternatively, one side of the substrate 10 may be provided with a driving circuit layer 60, and the driving circuit layer 60 may be provided with a plurality of thin film transistors 601, where the plurality of thin film transistors 601 are used to form a driving circuit, such as a pixel circuit, for providing a driving signal to the display panel 000. The anode layer 20 is disposed on a side of the driving circuit layer 60 facing away from the substrate 10, the anode layer 20 may form a plurality of anodes 201 through a patterning process, and the anodes 201 may be electrically connected to the thin film transistors 601 for transmitting driving signals of the pixel circuits to the anodes 201. Alternatively, anode layer 20 may be formed from a variety of conductive materials, such as anode layer 20 may be formed as a transparent anode or a reflective anode, depending on its intended use. When the anode 201 is formed as a transparent anode, the material of the anode layer 20 may include Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or the like; when the anode 201 is formed as a reflective anode, the material of the anode layer 20 may include silver, magnesium, aluminum, or the like, or other metal mixture, which is not particularly limited in this embodiment. The side of the anode layer 20, which is away from the substrate 10, is sequentially provided with a pixel defining layer 30 and a light emitting layer 40, the pixel defining layer 30 includes a plurality of openings 30K, the light emitting layer 40 includes a plurality of light emitting portions 401, the orthographic projection of the openings 30K on the substrate 10 is overlapped with the orthographic projection of the anode 201 on the substrate 10, at least a part of the anode 201 of the anode layer 20 is exposed by the openings 30K, the light emitting portions 401 are formed in the openings 30K, the pixel defining layer 30 is used for preventing the cross color and color mixing phenomenon between two adjacent light emitting portions 401, that is, the openings 30K of the pixel defining layer 30 are used for defining the light emitting portions 401 of adjacent organic light emitting materials, so as to correspondingly separate the light emitting portions 401 of different colors into relatively independent structures. Alternatively, the display panel 000 may include a plurality of sub-pixels 00, one sub-pixel 00 may be disposed corresponding to one light emitting portion 401, and the plurality of sub-pixels 00 may include a plurality of different colors (represented by different filling patterns in fig. 1), such as at least a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel; the plurality of sub-pixels 00 may be arranged in an array on the display panel 000, or may be arranged in other ways, fig. 1 of this embodiment only illustrates that the plurality of sub-pixels 00 are arranged in an array, it can be understood that fig. 1 of this embodiment only illustrates that the orthographic projection shape of one sub-pixel 00 to the light exit surface of the display panel 000 is a strip shape, and in specific implementation, the shape of the sub-pixel 00 includes but is not limited to this shape, and may be designed according to actual requirements.

It is understood that the display panel 000 of the present embodiment includes, but is not limited to, the above-mentioned film layer structure, and may also include other film layer structures, such as various metal conductive film layers used for making the thin film transistor 601 in the driving circuit layer 60, such as the cathode layer 70 on the light emitting layer 40, so that the light emitting portion 401 and the anode 201 and the cathode layer 70 form a stacked arrangement, and by applying a voltage between the anode 201 and the cathode layer 70, the light emitting portion 401 is made to emit visible light, thereby realizing an image that can be recognized by a user. The side of the cathode layer 70 away from the substrate 10 may also be provided with a thin film encapsulation layer 80, where the thin film encapsulation layer 80 may be used to isolate water and oxygen, so as to prevent water vapor and oxygen in the air from entering the light emitting layer 40 and the driving circuit layer 60, thereby damaging components therein, and may further include other film layer structures, such as a planarization layer, and the like. Alternatively, the thin film encapsulation layer 80 in this embodiment may include a first inorganic layer 801, an organic layer 802, and a second inorganic layer 803. The first inorganic layer 801 is used to block the organic layer 802, so as to prevent moisture, oxygen or other impurities in the organic layer 802 from permeating into the light emitting portion 401 of the organic light emitting material to react and damage the organic light emitting material, thereby preventing the display panel from failing. The organic layer 802 is used to relieve stress and prevent moisture and oxygen from entering the inorganic layer due to stress cracking. The second inorganic layer 803 is used to prevent moisture and oxygen in the external environment from invading the display panel 000. Also, the first inorganic layer 801 and the second inorganic layer 803 form a double protection, further reducing the probability of being invaded.

In the related art, when the display panel is a top emission display panel, the anode of the anode layer is formed as a reflective anode, that is, the material of the anode layer is a material with high reflectivity, because the opening of the pixel definition layer exposes at least a part of the anode layer, the rest part of the anode does not overlap with the light emitting part in the opening, the anode in the part of the anode is exposed in the range of the pixel definition layer (where the anode in the part of the anode refers to a part contacting with the pixel definition layer), and the material of the pixel definition layer is generally an insulating material with high transmissivity, when the display panel is not lit, external ambient light can easily reflect back after passing through the pixel definition layer and irradiating on the anode in the area, so that the reflectivity of the display panel in the range is high, thereby affecting the use effect of the display panel.

In order to solve the above problem, the present embodiment provides that the display panel 000 further includes a reversible color changing layer 50, the reversible color changing layer 50 is located on a side of the anode layer 20 away from the substrate 10, the reversible color changing layer 50 includes a first state and a second state, a transmittance of the reversible color changing layer 50 in the first state is different from a transmittance of the reversible color changing layer 50 in the second state, as shown in fig. 2 and 3, fig. 2 is a schematic cross-sectional view of the reversible color changing layer 50 in the first state, fig. 3 is a schematic cross-sectional view of the reversible color changing layer 50 in the second state, the reversible color changing layer 50 uses different filling patterns to distinguish the difference of the transmittances, that is, the reversible color changing layer 50 is made of a reversible and color changing material, the transmittance of the reversible color changing layer 50 is smaller in the first state (e.g. under a certain range of temperature), and the transmittance of the reversible color changing layer 50 is higher in the second state (e.g. under another certain range of temperature), therefore, the reversible color-changing layer 50 has different transmittances in different states, the low transmittance enables the reversible color-changing layer 50 to be used for shading, and the high transmittance enables the reversible color-changing layer 50 to be used for transmitting light. The present embodiment provides that the transmittance of the reversible color-changing layer 50 in the first state is smaller than that of the pixel defining layer 30, that is, the transmittance of the reversible color-changing layer 50 in the first state is smaller than the high transmittance of the pixel defining layer 30, and when the transmittance of the reversible color-changing layer 50 in the first state is lower than that of the pixel defining layer 30, the reversible color-changing layer 50 can exert the light blocking effect. The reversible color changing layer 50 of the present embodiment includes a plurality of first portions 501, and in the direction X parallel to the plane of the substrate 10, the first portions 501 are at least located between two adjacent openings 30K, that is, at least the first portions 501 are located between two adjacent openings 30K of the pixel defining layer 30, so that the first portions 501 having a smaller transmittance than that of the pixel defining layer 30 in the first state can be located between two adjacent openings 30K, and since the transmittance of the first portions 501 in the first state is smaller than that of the pixel defining layer 30, the first portions 501 in the first state can at least block a region (e.g., a region Q circled by a dotted line in fig. 2) where the anode 201 and the light emitting portion 401 in the openings 30K do not overlap, and when the external ambient light is irradiated onto the first portions 501, the first portions 501 having a lower transmittance can be absorbed but not reflected, so that the reflection phenomenon caused by the external ambient light being irradiated onto the anode 201 in the region Q can be avoided, it is advantageous to reduce the reflectance of the display panel 000 when it is not lit.

It is understood that the reversible color-changing layer 50 of the present embodiment may be disposed at any film position on a side of the anode layer 20 away from the substrate 10, for example, the reversible color-changing layer 50 illustrated in fig. 2 is disposed between the pixel defining layer 30 and the anode layer 20, or the reversible color-changing layer 50 may also be disposed on a side of the pixel defining layer 30 away from the anode layer 20 (not illustrated), or the reversible color-changing layer 50 may also be disposed at other positions, and this embodiment is not particularly limited, and only needs to satisfy that the reversible color-changing layer 50 is disposed on a side of the anode layer 20 away from the substrate 10, and the reflectivity may be reduced by the first portion 501 with low transmittance in the first state of the reversible color-changing layer 50.

It should be noted that, in this embodiment, the shape of the first portion 501 is not specifically limited, and may be a block shape, a hollow shape, or other shapes, and it is only necessary that the first portion 501 is located at least between two adjacent openings 30K along the direction X parallel to the plane of the substrate 10. It should be further noted that, in this embodiment, a manufacturing material of the reversible color-changing layer 50 is not limited, the manufacturing material of the reversible color-changing layer 50 may be one or more of an electrochromic material, a thermoreversible color-changing material, or a photo-reversible color-changing material, and the present embodiment is not particularly limited, and it is only required to satisfy that the color change of the reversible color-changing layer 50 is reversible, and the transmittance of the reversible color-changing layer 50 in the first state is smaller than the transmittance of the pixel defining layer 30, so that the transmittance of the reversible color-changing layer 50 in the first state is lower, and the reflection effect of ambient light is reduced.

In some alternative embodiments, continuing with reference to fig. 1-3, in the present embodiment, the reversible color-changing layer 50 is located between the anode layer 20 and the pixel defining layer 30 in a direction Z perpendicular to the plane of the substrate 10, and the first portion 501 is in direct contact with at least a portion of the anode 201.

This embodiment illustrates that the reversible color-changing layer 50 may be disposed between the anode layer 20 and the pixel defining layer 30, that is, when the display panel 000 is manufactured, the reversible color-changing layer 50 may be manufactured after the plurality of anodes 201 of the anode layer 20 are manufactured to form the plurality of first portions 201, such that the first portions 501 are in direct contact with at least a portion of the anodes 201. When the display panel 000 is not lit, that is, when the display panel 000 is in a dark state or a black state, the reversible color-changing layer 40 does not change color, that is, the reversible color-changing layer 40 may change to its original color, and at this time, the first portion 501 maintains a transmittance lower than that of the pixel defining layer 30 in the first state, and since the transmittance of the first portion 501 is lower than that of the pixel defining layer 30 at this time, even though the external ambient light transmits through the pixel defining layer 30 with a high transmittance, the external ambient light may be absorbed through the first portion 501 with a low transmittance, so that a reflection phenomenon caused by the external ambient light passing through the pixel defining layer 30 and irradiating onto the anode 201 may be avoided, and the reflectance of the display panel 000 in the black state or the dark state may be reduced. In this embodiment, the first portion 501 is at least directly contacted with a portion of the anode 201, the reversible color-changing layer 50 may be made of a thermochromic material, and after the display panel 000 is turned on, that is, when the display panel 000 displays a picture, the driving signal is transmitted to the anode 201, a certain amount of heat is generated in the process that the anode 201 transmits an electrical signal after the display panel 000 is turned on, the first portion 501 is directly contacted with the anode 201, and the first portion 501 directly contacted with the anode 201 is subjected to a thermochromic effect to change the color, and then enters the second state of the first portion 501, that is, the transmittance of the first portion 501 changes, optionally, the transmittance of the first portion 501 in the second state may be greater than the transmittance of the first portion 501 in the first state, that is, the transmittance of the first portion 501 after thermochromic is increased, and thus, when the display panel 000 displays a picture, the light emitted by the display panel 000 is affected because the first portion 501 is still in the first state of low transmittance The effect is favorable for improving the display quality.

It can be understood that, in this embodiment, the manufacturing material of the reversible color changing layer 50 is merely taken as an example for illustration, and in a specific implementation, the manufacturing material of the reversible color changing layer 50 may also be another reversible color changing material, for example, when the reversible color changing layer 50 is an electrochromic material, because the first portion 501 directly contacts with the anode 201, after the anode 201 is connected with an electrical signal, the first portion 501 is also correspondingly connected with the electrical signal, and at this time, the color (or transmittance) of the first portion 501 may also change.

Optionally, the display panel 000 of the present embodiment includes a black mode and a bright mode; in the black mode, the reversible color-changing layer 50 is in a first state; in the bright state mode, the reversible color-changing layer 50 is in the second state; the transmittance of the reversible color changing layer 50 in the first state is less than the transmittance of the reversible color changing layer 50 in the second state. The present embodiment explains that the reversible discoloration layer 50 may include at least two different transmittance states, and when the display panel 000 is in the black state mode, that is, the display panel 000 is not lit and no picture is displayed, the reversible discoloration layer 50 is in the first state, which may also be understood as an original state in which no color change is made. When the display panel 000 is in the bright mode, that is, the display panel 000 is illuminated to display a picture, the reversible color-changing layer 50 is in the second state, and the transmittance of the reversible color-changing layer 50 in the second state is greater than that of the reversible color-changing layer 50 in the first state, that is, after the display panel 000 is illuminated to generate a certain amount of heat, the first portion 501 is heated to increase its transmittance, so that the problem that the first portion 501 is still in the first state with low transmittance to affect the light emitting effect of the display panel 000 when the display panel 000 displays a picture can be avoided, which is beneficial to improving the display quality.

In some alternative embodiments, please refer to fig. 1, fig. 4 and fig. 5 in combination, fig. 4 is a schematic cross-sectional view taken along a direction a-a 'in fig. 1, fig. 5 is a schematic cross-sectional view taken along a direction a-a' in fig. 1, in this embodiment, the display panel 000 further includes a cathode layer, and the cathode layer 70 is located on a side of the light emitting layer 40 facing away from the substrate 10 in a direction Z perpendicular to a plane of the substrate 10;

the reversible color change layer 50 is located on a side of the cathode layer 70 facing away from the substrate 10; alternatively, the reversible color changing layer 50 is located between the cathode layer 70 and the pixel defining layer 30;

the first portion 501 is in direct contact with the cathode layer 70.

This embodiment explains that the display panel 000 may further include a cathode layer 70 covering the light emitting portion 401, the cathode layer 70 is located on a side of the light emitting layer 40 facing away from the substrate 10 in a direction Z perpendicular to a plane of the substrate 10, optionally, the display panel 000 may further include a hole transport layer, a hole injection layer, an electron injection layer, and an electron transport layer (not shown) located between the anode layer 20 and the cathode layer 70, the hole transport layer, the hole injection layer, the electron injection layer, and the electron transport layer are respectively located on opposite sides of the light emitting layer 40, and the light emitting principle of the display panel 000 is that under a certain electric field force formed by the anode layer 20 and the cathode layer 70, electrons and holes are respectively injected from the cathode layer 70 and the anode 201 to the electron transport layer and the hole transport layer, and then migrate to the light emitting portion 401 of the light emitting layer 40, and meet in the light emitting portion 401, form excitons and excite light emitting molecules, the latter is radiation relaxed to emit visible light. As shown in fig. 1 and fig. 4, the reversible color-changing layer 50 in this embodiment may be disposed on a side of the cathode layer 70 away from the substrate 10, that is, when the display panel 000 is manufactured, the reversible color-changing layer 50 may be manufactured after the cathode layer 70 is manufactured, so as to form a plurality of first portions 201, such that the first portions 501 are in direct contact with the cathode layer 70. Alternatively, as shown in fig. 1 and 5, the reversible color change layer 50 in the present embodiment may be disposed between the pixel defining layer 30 and the cathode layer 70, that is, when the display panel 000 is manufactured, the reversible color change layer 50 may be manufactured after the light emitting layer 40 is manufactured, and then the cathode layer 70 covering the light emitting portion 401 may be manufactured, so that the first portion 501 of the reversible color change layer 50 is at least located between the pixel defining layer 30 and the cathode layer 70 outside the opening 30K, and at this time, the first portion 501 is still in direct contact with the cathode layer 70. When the display panel 000 is not lit, that is, when the display panel 000 is in a dark state or a black state, the reversible color-changing layer 40 does not change color, that is, the reversible color-changing layer 40 is in an original color, and at this time, the first portion 501 maintains a transmittance lower than that of the pixel defining layer 30 in the first state, so that after the external ambient light transmits through the thin film encapsulation layer 80 or the cathode layer 70 with a high transmittance, the external ambient light can be absorbed through the first portion 501 with a low transmittance, thereby preventing a reflection phenomenon caused by the external ambient light irradiating the anode 201, and being beneficial to reducing the reflectance of the display panel 000 in the dark state or the black state.

In this embodiment, the first portion 501 is directly contacted with the cathode layer 70, the reversible color changing layer 50 may be made of a thermochromic material, after the display panel 000 is turned on, that is, the display panel 000 displays a picture, the driving signal is transmitted to the cathode layer 70, the cathode layer 70 generates a certain amount of heat in the process of transmitting an electrical signal after the display panel 000 is turned on, the first portion 501 is directly contacted with the cathode layer 70, so that the first portion 501 directly contacted with the cathode layer 70 is subjected to a thermochemical effect to change color, and then the first portion 501 enters the second state, that is, the transmittance of the first portion 501 changes, optionally, the transmittance of the first portion 501 in the second state may be greater than the transmittance of the first portion 501 in the first state, that the transmittance of the first portion 501 after the thermochromism is increased, and thus, when the display panel 000 displays a picture, the picture is affected by the first portion 501 still in the first state with a low transmittance The light effect is beneficial to improving the display quality.

It can be understood that, in this embodiment, only the position of the film layer that can be set when the reversible color-changing layer 50 is located on the side of the anode layer 20 away from the substrate 10 is illustrated by way of example, and in specific implementation, the position where the reversible color-changing layer 50 is located in the display panel 000 includes, but is not limited to, the above position, and since the reversible color-changing layer 50 does not need to exert an electrical function, it may also be set at another position, and it only needs to satisfy that the reversible color-changing layer 50 is structurally located on the side of the anode layer 20 away from the substrate 10 and as close as possible to the heat generating layer in the display panel 000 (the heat generating layer refers to a film layer of the display panel 000 that generates a certain amount of heat due to transmission of an electrical signal when displaying a picture), so that the color of the first portion 501 can be changed by sensing heat, and further the transmittance of the first portion 501 can be changed.

In some alternative embodiments, continuing to refer to fig. 1-5, in this embodiment, the color of the reversible color-changing layer 50 in the first state comprises one of black or gray.

The embodiment explains that the reversible color changing layer 50 may include one of black or gray before the color is not changed, and the transmittance of the reversible color changing layer 50 of black or gray is low, so that the transmittance of the reversible color changing layer 50 in the first state may be smaller than the high transmittance of the pixel defining layer 30, and when the display panel 000 is in a dark state or a black state, the external ambient light may be absorbed by the first portion 501 with low transmittance of black or gray, so that the reflection phenomenon caused by the external ambient light irradiating the anode 201 may be avoided, and the reflectance of the display panel 000 in the dark state or the dark state may be reduced.

It should be noted that, this embodiment is only an example of colors that the reversible color-changing layer 50 in the first state may include, but not limited to, in specific implementation, the original color of the reversible color-changing layer 50 includes other colors, and it is only required that the transmittance of the reversible color-changing layer 50 in the original color in the first state is smaller than the transmittance of the pixel defining layer 30, so that the display panel 000 can absorb the external ambient light in a dark state or a black state, and the external ambient light is prevented from being irradiated to the anode 201 and reflected, which is not described herein again.

Alternatively, referring to fig. 1 and fig. 6 in combination, fig. 6 is another schematic sectional structure diagram from a-a' in fig. 1, in this embodiment, the materials of the reversible color-changing layer 50 corresponding to the sub-pixel 00 with different colors may be different (shown by different filling patterns in fig. 6), for example, the material of the reversible color-changing layer 50 corresponding to the red sub-pixel 01 (red light-emitting portion 401R) may be a material whose color changes from black or gray with low transmittance to red or near-red with high transmittance after temperature rise, the material of the reversible color-changing layer 50 corresponding to the green sub-pixel 02 (green light-emitting portion 401G) may be a material whose color changes from black or gray with low transmittance to green or near-green with high transmittance after temperature rise, the material of the reversible color-changing layer 50 corresponding to the blue sub-pixel 03 (blue light-emitting portion 401B) may be a material whose color changes from black or gray with low transmittance to blue or near-blue with high transmittance after temperature rise, therefore, when the display panel 000 is lighted up to display a picture, the transmittance of the first portion 501 becomes smaller after the first portion 501 changes color due to temperature rise, the light emitting effect is prevented from being influenced, and meanwhile, the color of the first portion 501 after temperature rise can be close to or the same as the color of the corresponding sub-pixel 00, so that the aperture opening ratio of the display panel 000 can be further improved, and the display quality can be improved.

In some alternative embodiments, please refer to fig. 7 and fig. 8 in combination, fig. 7 is another schematic plane structure diagram of the display panel according to the embodiment of the present invention, fig. 8 is a schematic cross-sectional structure diagram along the direction B-B' in fig. 7 (for clearly illustrating the structure of the present embodiment, fig. 7 is filled with transparency), in the present embodiment, the display panel 000 further includes a thin film encapsulation layer 80, a color film layer 901, and a black matrix layer 902;

the thin film encapsulation layer 80 is positioned on one side of the luminescent layer 40, which is far away from the substrate 10, and the color film layer 901 and the black matrix layer 902 are positioned on one side of the thin film encapsulation layer 80, which is far away from the substrate 10;

the color film layer 901 comprises a plurality of color resistors 9010, and the orthographic projection of the color resistors 9010 on the substrate 10 is overlapped with the orthographic projection of the opening 30K on the substrate 10;

the black matrix layer 902 includes a plurality of light-shielding strips 9021, and in a direction X parallel to the plane of the substrate 10, the light-shielding strips 9021 are located between two adjacent openings 30K;

the first portion 501 includes a first sub-portion 5011, and an orthographic projection of the first sub-portion 5011 on the substrate 10 does not overlap with an orthographic projection of the light-shielding bar 9021 on the substrate 10.

The embodiment explains that the display panel 000 may further include a color film layer 901 and a black matrix layer 902, optionally, the color film layer 901 and the black matrix layer 902 may be disposed on a side of the film encapsulation layer 80 away from the substrate 10, the color film layer 901 may include a plurality of color resistors 9010 of different colors, an orthogonal projection of the color resistor 9010 on the substrate 10 is overlapped with an orthogonal projection of the opening 30K on the substrate 10, that is, the color resistor 9010 of one color corresponds to the subpixel 00 of one color, optionally, the color resistor 9010 may be made of a material such as a filter. The black matrix layer 902 includes a plurality of light-shielding bars 9021, and in a direction X parallel to the plane of the substrate 10, the light-shielding bars 9021 are located between two adjacent openings 30K, that is, the plurality of light-shielding bars 9021 in the black matrix layer 902 may intersect to define a region where the color resistor 9010 is located.

In the organic light emitting display panel, since the light emitting layer 40 made of the organic light emitting material is self-luminous, a polarizer is not required to be disposed originally, but since the reflection of the external light at the cathode layer 70 is likely to cause a low contrast ratio of the product, the reflection of the external light in the general organic light emitting display panel needs to be reduced by a circular polarizer. The circular polarizer is generally formed by combining a common polarizer and 1/4 wave plates, external environment light is firstly changed into linearly polarized light through the polarizer, then changed into circularly polarized light through the 1/4 wave plate, and after reflection, the circularly polarized light is changed into linearly polarized light when passing through the 1/4 wave plate for the second time, and the polarization direction of the linearly polarized light is perpendicular to that of the incident linearly polarized light, so that the emission of reflected light is reduced. Although the circular polarizer can reduce the reflection of the external environment light, the contrast of the organic light-emitting display panel is improved when the organic light-emitting display panel is used outdoors. However, the circular polarizer has problems such as low transmittance, thick thickness, and poor folding property. Therefore, in this embodiment, the color film layer 901 and the black matrix layer 902 are disposed on the side of the thin film encapsulation layer 80 away from the substrate 10 by using a color film manufacturing process to replace a circular polarizer in the organic light emitting display panel, and by using a color film filtering principle, the orthographic projection of the color resistor 9010 on the substrate 10 is overlapped with the orthographic projection of the opening 30K on the substrate 10, that is, the color resistor 9010 covers the sub-pixel 00, which not only can play a role of antireflection, but also can filter the spectrum of the sub-pixel 00, so that the spectrum is narrowed, the color purity is higher, which is beneficial to improving the display effect, and the black matrix layer 902 can absorb ambient light, so as to block the external light reflection, and is also beneficial to reducing the cost, and provides possibility for the design of a flexible product.

Since the black matrix layer 902 may not be entirely disposed in the display panel 000 in order to ensure the aperture ratio of the display panel 000, the width of the light-shielding bars 9021 between two adjacent openings 30K needs to be limited to a certain width, and when the light-shielding bars 9021 do not sufficiently cover the anode 201, ambient light may easily irradiate the anode 201 except the light-shielding bars 9021 and be reflected. Therefore, the first portion 501 of the present embodiment includes the first sub-portion 5011, the orthographic projection of the first sub-portion 5011 on the substrate 10 does not overlap with the orthographic projection of the light-shielding bar 9021 on the substrate 10, when the display panel 000 is provided with the black matrix layer 902, the light-shielding bar 9021 is located between two adjacent openings 30K along the direction X parallel to the plane of the substrate 10, the light-shielding bar 9021 of the black matrix layer 902 can play a role in absorbing ambient light irradiated between the two adjacent openings 30K, the first portion 501 includes the first sub-portion 5011, and the first sub-portion 5011 can be understood as an area of the reversible color-changing layer 50 that effectively absorbs light, that is, the first 501sub-portion 1 of the reversible color-changing layer 50 can be used to reduce the reflectance in a range outside the light-shielding bar 9021 of the black matrix layer 902, and the aperture ratio of the display panel 000 can be prevented from being affected by the too wide arrangement of the light-shielding bar 9021 of the black matrix layer 902.

In some alternative embodiments, please continue to refer to fig. 7 and 8 in combination, in this embodiment, the orthographic projection of the anode 201 on the substrate 10 is a first projection N1, the orthographic projection of the opening 30K on the substrate 10 is a second projection N2, the area of the first projection N1 is larger than the area of the second projection N2, and the first projection N1 covers the second projection N2;

the anode 201 comprises a second portion 2011, the second portion 2011 being the part of the first projection N1 beyond the second projection N2;

the orthographic projection of the first sub-portion 5011 on the substrate 10 overlaps with the orthographic projection of the second portion 2011 on the substrate 10.

This embodiment explains that the orthographic projection first projection N1 of the anode 201 in the anode layer 20 on the substrate 10 is generally larger than the orthographic projection second projection N2 of the opening 30K on the substrate 10, and the first projection N1 covers the second projection N2, so that when the organic light emitting material can be deposited in the opening 30K, it can be ensured that the pixel defining layer 30 cannot cover the anode 201, and the organic light emitting material overflows to the outside of the anode 201, thereby affecting the display quality. At this time, since the region of the anode 201 beyond the opening 30K, that is, the second portion 2011 has high reflection, the orthographic projection of the first sub-portion 5011, where the first portion 501 does not overlap the light shielding strip 9021, on the substrate 10 at least overlaps the orthographic projection of the second portion 2011 of the anode 201 on the substrate 10, so that the problem that the pixel defining layer 30 transmits light and ambient light is reflected on the second portion 2011 of the anode 201 can be solved well.

In some alternative embodiments, please refer to fig. 7, fig. 9 and fig. 10 in combination, fig. 9 is a partial enlarged schematic view of a region M in fig. 7, fig. 10 is a schematic view of another cross-sectional structure along the direction B-B' in fig. 7 (for clarity, the structure of the present embodiment is illustrated, and transparency filling is performed in fig. 9), in this embodiment, the display panel 000 includes a plurality of sub-pixels 00 with different colors, and the plurality of sub-pixels with different colors at least include a blue sub-pixel 03, a green sub-pixel 02 and a red sub-pixel 01;

in the reversible color changing layer 50, the area of the front projection of the first sub-section 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is S1, the area of the front projection of the first sub-section 5011G corresponding to the green sub-pixel 02 on the substrate 10 is S2, and the area of the front projection of the first sub-section 5011R corresponding to the red sub-pixel 01 on the substrate 10 is S3; wherein S1 is less than S2, and S1 is less than S3. Optionally, S2 < S3.

This embodiment explains that the display panel 000 includes a plurality of subpixels 00 of different colors, the plurality of subpixels 00 of different colors includes at least a blue subpixel 03, a green subpixel 02, and a red subpixel 01, the light emitting portion 401 corresponding to the blue subpixel 03 is a blue light emitting portion 401B, the light emitting portion 401 corresponding to the green subpixel 02 is a green light emitting portion 401G, the light emitting portion 401 corresponding to the red subpixel 01 is a red light emitting portion 401R, and since there are different degrees of reflection of light irradiated onto the surface of each of the subpixels 00 of different colors, when the display panel 000 is not lit, a reflected light ratio ab after the reflection of the blue subpixel 03, the green subpixel 02, and the red subpixel 01 needs to be close to 0 (here, 0 represents black, the Lab color space is established by the international commission on 1976, the Lab color space represents one color space by three coordinate axes L, a, B perpendicular to each other, the L axis indicates brightness, black at the bottom, white at the top, + a indicates magenta, -a indicates green, + b indicates yellow, -b indicates blue, a axis indicates red-green axis, b axis indicates yellow-blue axis, and the hue and characteristics of any color can be represented by a, b values), that is, the reflected light exhibits a black state (the reflected light ratio a b needs to be close to 0) instead of other color shifts such as bluish green. Therefore, in this embodiment, in order to make the display panel 000 show a better black state after the light is reflected by the blue subpixel 03, the green subpixel 02 and the red subpixel 01 when the display panel 000 is not lit, the areas of the first subsections 5011 corresponding to the subpixels 00 of different colors are different, specifically, in the reversible color-changing layer 50, the area S1 of the first subsection 5011B corresponding to the blue subpixel 03 on the substrate 10 is smaller than the area S2 of the first subsection 5011G corresponding to the green subpixel 02 on the substrate 10, the area S1 of the first subsection 5011B corresponding to the blue subpixel 03 on the substrate 10 is also smaller than the area S3 of the first subsection 5011R corresponding to the red subpixel 01 on the substrate 10, further optionally, the area S2 of the first subsection 5011G corresponding to the green subpixel 02 on the substrate 10 is smaller than the area S3 of the first subsection 5011R corresponding to the red subpixel 01 on the substrate 10, that is, the first sub-portion 5011R corresponding to the red sub-pixel 01 is largest on the front projection area S3 of the substrate 10, and the first sub-portion 5011B corresponding to the blue sub-pixel 03 is smallest on the front projection area S1 of the substrate 10, so as to balance the color phases, so that when the display panel 000 is not lit, the light is reflected by the blue sub-pixel 03, the green sub-pixel 02 and the red sub-pixel 01 to have a better black state effect, and avoid color cast.

It should be noted that, in this embodiment, the different areas of the first subsections 5011 corresponding to the sub-pixels 00 with different colors may be set in various manners, as shown in fig. 9, the orthographic projection shapes of the first subsections 5011 corresponding to the sub-pixels 00 with different colors on the substrate 10 may be designed to be different, or the widths of the shading strips 9021 corresponding to the sub-pixels 00 with different colors may be set to expose the first subsections 5011 with different areas, and in a specific implementation, the setting may be selected according to actual requirements, and this embodiment is not limited.

Alternatively, please refer to fig. 7, fig. 11 and fig. 12 in combination, fig. 11 is another partially enlarged schematic view of the region M in fig. 7, and fig. 12 is a schematic view of the reversible color changing layer in fig. 11 (fig. 11 is filled with transparency for clarity in order to illustrate the structure of the present embodiment), in the present embodiment, in the reversible color changing layer 50, the orthographic shape of the first sub-portion 5011R corresponding to the red sub-pixel 01 on the substrate 10 is a ring shape, and the orthographic shape of the first sub-portion 5011G corresponding to the green sub-pixel 02 on the substrate 10 is a half-ring shape.

This embodiment explains that in order to make the display panel 000 show a better black state after the light is reflected by the blue subpixel 03, the green subpixel 02 and the red subpixel 01 when the display panel is not lit, the area of the first subsections 5011 corresponding to the subpixels 00 of different colors can be different by designing the orthogonal projection shapes of the first subsections 5011 corresponding to the subpixels 00 of different colors to be different, specifically, the orthogonal projection shape of the first subsection 5011R corresponding to the red subpixel 01 on the substrate 10 is annular, the orthogonal projection shape of the first subsection 5011G corresponding to the green subpixel 02 on the substrate 10 is half-annular, in this case, the width DR of the first subsection 5011R corresponding to the red subpixel 01 and the width DG of the first subsection 5011G corresponding to the green subpixel 02 can be the same, i.e., in the inversion layer 50, the widths of the first sections 501 corresponding to the subpixels 00 of different colors can be the same, the widths of the shading strips 9021 of the black matrix layer 902 located in the adjacent openings 30K may also be the same, and only by setting the first sub-portions 5011 to be different in annular or semi-annular shapes, the areas of the first sub-portions 5011 corresponding to the sub-pixels 00 with different colors may be different, so that when the display panel 000 is not lit, light is reflected by the blue sub-pixel 03, the green sub-pixel 02 and the red sub-pixel 01 to present a better black state, color cast is avoided, meanwhile, the process difficulty may be reduced, and the process efficiency may be improved.

Further alternatively, as shown in fig. 7, 11 and 12, in order to realize that the forward projection area S1 of the first sub-portion 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is smaller than the forward projection area S2 of the first sub-portion 5011G corresponding to the green sub-pixel 02 on the substrate 10, the forward projection area S1 of the first sub-portion 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is also smaller than the forward projection area S3 of the first sub-portion 5011R corresponding to the red sub-pixel 01 on the substrate 10, the forward projection area S3 of the first sub-portion 5011R corresponding to the red sub-pixel 01 on the substrate 10 is largest, the forward projection area S1 of the first sub-portion 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is smallest, the forward projection area S1 of the first sub-portion 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is not provided, that the first sub-portion 5011B corresponding to the blue sub-pixel 03 is not provided, and the forward projection area S1 of the first sub-pixel 501 corresponding to the blue sub-pixel 03 is not provided, therefore, the manufacturing material of the reversible color-changing layer 50 can be saved, the cost can be reduced, and the effect of reducing the reflectivity of the display panel in the 000 black state can be realized.

Optionally, with continuing reference to fig. 7 and 10, in the present embodiment, along the direction X parallel to the plane of the substrate 10, the width of the first sub-portion 02 corresponding to the red sub-pixel 01 is D1;

the first sub-section 5011G corresponding to the green sub-pixel has a width D2 in the direction X parallel to the plane of the substrate 10; wherein D1 > D2.

This embodiment explains that in order to make the display panel 000 show a better black state after the light is reflected by the blue sub-pixel 03, the green sub-pixel 02 and the red sub-pixel 01 when the display panel 000 is not lit, the widths of the light-shielding strips 9021 corresponding to the sub-pixels 00 of different colors may be set to be different so as to expose the first sub-portions 5011 of different areas, so as to realize that the areas of the first sub-portions 5011 corresponding to the sub-pixels 00 of different colors are different, specifically, along the direction X parallel to the plane of the substrate 10, the width of the first sub-portion 02 corresponding to the red sub-pixel 01 is D1; the first sub-section 5011G corresponding to the green sub-pixel 02 has a width D2 in the direction X parallel to the plane of the substrate 10; in the direction X parallel to the plane of the substrate 10, optionally, the width of the first sub-portion 5011B corresponding to the blue sub-pixel 03 is D3, and the width of the D2 is D3, at this time, the orthogonal projection shapes of the first sub-portion 5011 corresponding to the sub-pixel 00 with different colors on the substrate 10 may be all annular (not shown with a planar structure diagram) or all other shapes, and it is only necessary to set the widths of the shading strips 9021 corresponding to the sub-pixels 00 with different colors to be different, so as to realize that the areas of the first sub-portions 5011 corresponding to the sub-pixels 00 with different colors are different, and further, when the display panel 000 is not lit, light is reflected by the blue sub-pixel 03, the green sub-pixel 02, and the red sub-pixel 01 to present a better black state, thereby avoiding color cast.

Alternatively, referring to fig. 7 and 13 in combination, fig. 13 is another partially enlarged schematic view of the region M in fig. 7 (fig. 13 is filled with transparency for clarity), in this embodiment, the first portion 501 of the reversible color-changing layer 50 includes a closed ring-shaped structure, and the first portion 501 is disposed around the opening 30K. This embodiment explains that the first portion 501 of the reversible color-changing layer 50 may be a closed ring structure, and the first portion 501 of the closed ring structure may be disposed around 30K to absorb the external ambient light irradiated to the uncovered region of the light-shielding bar 9021, thereby reducing the reflectivity of the display panel 000 when it is not lit.

Optionally, referring to fig. 7 and 14 in combination, fig. 14 is another partial enlarged schematic view of the area M in fig. 7 (in order to clearly illustrate the structure of the present embodiment, the transparency is filled in fig. 14), in the present embodiment, the first portion 501 includes a segmented annular structure, the first portion 501 includes a plurality of first segments 5010, and the plurality of first segments 5010 are arranged at intervals around the opening 30K. This embodiment illustrates that the first portion 501 of the reversible color changing layer 50 may be a segmented ring structure, and the first portion 501 of the segmented ring structure includes a plurality of first segments 5010, and the plurality of first segments 5010 may be uniformly disposed around 30K to absorb the external ambient light irradiated to the uncovered area of the light-shielding bars 9021, so as to reduce the reflectivity of the display panel 000 when the display panel is not lit.

It should be understood that this embodiment is only an example of a shape that the first portion 501 of the reversible color changing layer 50 may be set, and when implemented specifically, the embodiment includes but is not limited to this, and the first portion 501 of the reversible color changing layer 50 may also be set in other shapes, which is not described in detail in this embodiment.

In some alternative embodiments, please refer to fig. 7 and fig. 15 in combination, fig. 15 is a partially enlarged schematic view of a region F in fig. 7 (fig. 15 is filled with transparency for clarity in order to illustrate the structure of the present embodiment), in the present embodiment, the display panel 000 includes a plurality of pixel units P, and each pixel unit P includes a plurality of sub-pixels 00 with different colors; the plurality of sub-pixels of different colors includes at least a first sub-pixel 001;

the plurality of pixel units P includes at least a first pixel unit P1 and a second pixel unit P2;

in the first pixel cell P1, the orthographic projection of the first portion 501 corresponding to the first sub-pixel 001 on the substrate 10 is a first pattern;

in the second pixel cell P2, the orthographic projection of the first portion 501 corresponding to the first sub-pixel 001 on the substrate 10 is a second pattern;

the first pattern has a shape different from a shape of the second pattern.

The present embodiment explains that in different pixel units P in the display panel 000, the shapes of the orthographic projections of the first portions 501 corresponding to the same-color sub-pixels 00 on the substrate 10 are different, specifically, the display panel 000 includes a plurality of pixel units P, each pixel unit P includes a plurality of sub-pixels 00 of different colors, optionally, one pixel unit P may include at least three sub-pixels 00 of different colors, for example, one pixel unit P may include at least a red sub-pixel 01, a green sub-pixel 02, and a blue sub-pixel 03, and one pixel unit P includes at least a first sub-pixel 001, and then the first sub-pixel 001 may be any one of the red sub-pixel 01, the green sub-pixel 02, and the blue sub-pixel 03. In this embodiment, the plurality of pixel units P at least include the first pixel unit P1 and the second pixel unit P2, and optionally, the first pixel unit P1 and the second pixel unit P2 may be two adjacent pixel units P in the display panel 000 (for example, two pixel units P in the F region illustrated in fig. 15), or may be two non-adjacent pixel units P. In the first pixel unit P1, the orthographic projection of the first part 501 corresponding to the first sub-pixel 001 on the substrate 10 is a first pattern, and in the second pixel unit P2, the orthographic projection of the first part 501 corresponding to the first sub-pixel 001 with the same color on the substrate 10 is a second pattern, the shape of the first pattern is different from that of the second pattern, as shown in fig. 15, the shape of the first pattern is a closed ring shape, and the shape of the second pattern is a segmented ring shape; or the shape of the first graph is a sectional annular shape, and the shape of the second graph is a closed annular shape; or, the shape of the first pattern and the shape of the second pattern are different shapes (for example, a structure designed around the opening 30K in a circular shape with a radian and two-step shape), and this embodiment is not limited, so that the shape of the first portion 501 corresponding to the sub-pixel 00 with the same color in different pixel units P can be designed differently, so as to avoid the diffraction phenomenon through the first portions 501 arranged in a non-periodic shape, and improve the display effect of the display panel 000.

In some alternative embodiments, please refer to fig. 16, where fig. 16 is a schematic plane structure diagram of a display device according to an embodiment of the present invention, and the display device 111 according to this embodiment includes the display panel 000 according to the above embodiment of the present invention. The embodiment of fig. 16 is only an example of a mobile phone, and the display device 111 is described, it is understood that the display device 111 provided in the embodiment of the present invention may be another display device 111 having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the display panel 000 provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel 000 in the above embodiments, which is not described herein again.

As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display panel, comprising:

a substrate;

an anode layer on one side of the substrate, the anode layer comprising a plurality of anodes;

a pixel defining layer on a side of the anode layer facing away from the substrate, the pixel defining layer including a plurality of openings overlapping an orthographic projection of the anode on the substrate, the openings exposing at least a portion of the anode;

a light emitting layer located on a side of the pixel defining layer facing away from the substrate, the light emitting layer including a plurality of light emitting portions located within the openings;

a reversible color changing layer located on a side of the anode layer facing away from the substrate, the reversible color changing layer including a first state and a second state, a transmittance of the reversible color changing layer in the first state being different from a transmittance of the reversible color changing layer in the second state, the transmittance of the reversible color changing layer in the first state being less than the transmittance of the pixel defining layer;

the reversible color changing layer comprises a plurality of first parts, and the first parts are at least positioned between two adjacent openings along the direction parallel to the plane of the substrate.

2. The display panel of claim 1, wherein the reversible color shifting layer is between the anode layer and the pixel defining layer, and wherein the first portion is in direct contact with at least a portion of the anode.

3. The display panel according to claim 1, further comprising a cathode layer on a side of the light-emitting layer facing away from the substrate;

the reversible color changing layer is positioned on one side of the cathode layer, which is far away from the substrate; alternatively, the reversible color change layer is located between the cathode layer and the pixel defining layer;

the first portion is in direct contact with the cathode layer.

4. The display panel of claim 1, wherein the color of the reversible color shifting layer in the first state comprises one of black or gray.

5. The display panel according to claim 1, wherein the display panel comprises a black-state mode and a bright-state mode;

in the black state mode, the reversible color-changing layer is in the first state;

in the bright state mode, the reversible color changing layer is in the second state;

the transmittance of the reversible color changing layer in the first state is less than the transmittance of the reversible color changing layer in the second state.

6. The display panel according to claim 1, wherein the display panel further comprises a thin film encapsulation layer, a color film layer, and a black matrix layer;

the film packaging layer is positioned on one side of the light emitting layer, which is far away from the substrate, and the color film layer and the black matrix layer are positioned on one side of the film packaging layer, which is far away from the substrate;

the color film layer comprises a plurality of color resistors, and the orthographic projection of the color resistors on the substrate is overlapped with the orthographic projection of the opening on the substrate;

the black matrix layer comprises a plurality of light shielding strips, and the light shielding strips are positioned between two adjacent openings along a direction parallel to the plane of the substrate;

the first portion comprises a first sub-portion, and the orthographic projection of the first sub-portion on the substrate does not overlap with the orthographic projection of the shading strip on the substrate.

7. The display panel according to claim 6, wherein the display panel comprises a plurality of different color sub-pixels, the plurality of different color sub-pixels comprising at least a blue sub-pixel, a green sub-pixel, and a red sub-pixel;

in the reversible color changing layer, an area of an orthographic projection of the first sub-section corresponding to the blue sub-pixel on the substrate is S1, an area of an orthographic projection of the first sub-section corresponding to the green sub-pixel on the substrate is S2, and an area of an orthographic projection of the first sub-section corresponding to the red sub-pixel on the substrate is S3; wherein S1 is less than S2, and S1 is less than S3.

8. The display panel according to claim 7, wherein S2 < S3.

9. The display panel according to claim 7, wherein in the reversible color-changing layer, an orthogonal projection shape of the first sub-portion corresponding to the red sub-pixel on the substrate is a ring shape, and an orthogonal projection shape of the first sub-portion corresponding to the green sub-pixel on the substrate is a half ring shape.

10. The display panel according to claim 7,

the width of the first sub-part corresponding to the red sub-pixel along the direction parallel to the plane of the substrate is D1;

the width of the first sub-part corresponding to the green sub-pixel along the direction parallel to the plane of the substrate is D2; wherein D1 > D2.

11. The display panel according to claim 7, wherein the first portion is not provided in a position corresponding to the blue sub-pixel in the reversible color-changing layer.

12. The display panel of claim 6, wherein an orthogonal projection of the anode on the substrate is a first projection, an orthogonal projection of the opening on the substrate is a second projection, an area of the first projection is larger than an area of the second projection, and the first projection covers the second projection;

the anode comprises a second portion, the second portion being a portion of the first projection that exceeds the second projection;

an orthographic projection of the first sub-portion on the substrate overlaps an orthographic projection of the second portion on the substrate.

13. The display panel according to claim 1, wherein the first portion comprises a closed loop structure, the first portion being disposed around the opening.

14. The display panel of claim 1, wherein the first portion comprises a segmented ring structure comprising a plurality of first segments spaced around the opening.

15. The display panel of claim 1, wherein the reversible color changing layer comprises one or more of an electrochromic material, a thermoreversible color changing material, or a photo-reversible color changing material.

16. The display panel according to claim 1, wherein the display panel comprises a plurality of pixel units, the pixel units comprising a plurality of sub-pixels of different colors; the plurality of sub-pixels of different colors includes at least a first sub-pixel;

the plurality of pixel units at least comprise a first pixel unit and a second pixel unit;

in the first pixel unit, orthographic projection of the first part corresponding to the first sub-pixel on the substrate is a first graph;

in the second pixel unit, the orthographic projection of the first part corresponding to the first sub-pixel on the substrate is a second graph;

the shape of the first pattern is different from the shape of the second pattern.

17. A display device characterized by comprising the display panel according to any one of claims 1 to 16.