Display panel and display device

Abstract

The present invention discloses a display panel and a display device, belonging to the field of display technology. The display panel includes a substrate, an anode layer, a pixel definition layer, a light-emitting layer, and a reversible color-changing layer. The anode layer includes a plurality of anodes, the pixel definition layer includes a plurality of openings, the orthographic projection of the opening on the substrate overlaps with the orthographic projection of the anode in the opening, and the opening exposes at least a part of the anode. The light-emitting layer includes a plurality of light-emitting parts, and the light-emitting parts are located in the openings. The reversible color-changing layer includes a first state and a second state, and the transmittance of the reversible color-changing layer in the first state is different from the transmittance of the reversible color-changing layer in the second state. The transmittance of the reversible color-changing layer in the first state is less than the transmittance of the pixel definition layer. The reversible color-changing layer includes a plurality of first parts, and along the direction parallel to the plane where the substrate is located, the first parts are at least located between two adjacent openings. The display device includes the above display panel. The present invention can reduce the reflectivity of the display panel when it is not lit.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more particularly, to a display panel and a display device. Background Art

[0002] Organic light-emitting diode (OLED) displays, also known as organic light-emitting diode (OLED) displays, offer advantages over liquid crystal displays (LCDs), such as self-luminescence, wide viewing angles, high contrast, lower power consumption, extremely fast response times, ultra-light weight, flexible displays, rollable screens, strong temperature adaptability, and simple manufacturing processes. They have become a research hotspot in the field of optoelectronic display technology.

[0003] In existing technology, OLED devices typically utilize reflective electrodes, such as cathodes or anodes, and when the display is unlit, ambient light hitting the reflective electrodes will reflect the light back. This is particularly true since most reflective electrodes are made of metal, resulting in high reflectivity, thus reducing the performance of the display device. The current industry practice is to add a polarizer above the light-emitting surface of the OLED device to improve this reflection, but this approach is costly and presents issues such as low transmittance, which affects the display quality, thickness, and poor flexibility.

[0004] Therefore, providing a display panel and a display device that can reduce the reflectivity in the dark state and avoid affecting the display effect during display is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a display panel and a display device to solve the problem in the prior art that display devices have high reflectivity in a dark state and low transmittance when lit, which affects display quality.

[0006] The present invention discloses a display panel, comprising: a substrate; an anode layer, the anode layer being located on one side of the substrate and comprising a plurality of anodes; a pixel definition layer, the pixel definition layer being located on a side of the anode layer facing away from the substrate and comprising a plurality of openings, the orthographic projections of the openings on the substrate overlapping with the orthographic projections of the anodes on the openings, and the openings exposing at least part of the anodes; a light-emitting layer, the light-emitting layer being located on a side of the pixel definition layer facing away from the substrate and comprising a plurality of light-emitting portions, the light-emitting portions being located within the openings; a reversible color-changing layer, the reversible color-changing layer being located on a side of the anode layer facing away from the substrate and comprising a first state and a second state, the transmittance of the reversible color-changing layer in the first state being different from the transmittance of the reversible color-changing layer in the second state, and the transmittance of the reversible color-changing layer in the first state being less than the transmittance of the pixel definition layer; the reversible color-changing layer comprising a plurality of first portions, and the first portions being located at least between two adjacent openings along a direction parallel to the plane where the substrate is located.

[0007] Based on the same inventive concept, the present invention also discloses a display device, which includes the above-mentioned display panel.

[0008] Compared with the prior art, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:

[0009] The present invention provides that the display panel includes a reversible color-changing layer, which is located on the side of the anode layer away from the substrate. The reversible color-changing layer includes a first state and a second state, and the transmittance of the reversible color-changing layer in the first state is different from that in the second state. The material of the reversible color-changing layer is a reversible and color-changing material, so that the reversible color-changing layer forms different transmittances in different states. The low transmittance can make the reversible color-changing layer used as a light-shielding layer, and the high transmittance can make the reversible color-changing layer used as a light-transmitting layer. The present invention provides that the transmittance of the reversible color-changing layer in the first state is less than that of the pixel definition layer. At this time, the transmittance of the reversible color-changing layer in the first state is relatively low compared with the pixel definition layer, and the reversible color-changing layer can play a light-shielding effect. The present invention provides that the reversible color-changing layer includes a plurality of first parts, and along the direction parallel to the plane where the substrate is located, the first parts are at least located between two adjacent openings of the pixel definition layer. Since the transmittance of the first part in the first state is less than that of the pixel definition layer, at least the first part in the first state can block the area where the anode does not overlap with the light-emitting part in the opening. When external ambient light irradiates on the first part, it will be absorbed by the first part with low transmittance instead of being reflected, so as to avoid the reflection phenomenon caused by the external ambient light irradiating on the anode in this area range, which is beneficial to reducing the reflectance of the display panel when it is not lit.

[0010] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned technical effects simultaneously.

[0011] Through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0013] Figure 1 is a schematic plan view of a display panel provided by an embodiment of the present invention;

[0014] Figure 2 is Figure 1 a schematic cross-sectional structure view taken along the line A-A' in

[0015] Figure 3 is Figure 1Another schematic cross-sectional structure diagram in the A-A' direction;

[0016] Figure 4 Is Figure 1 Another schematic cross-sectional structure diagram in the A-A' direction;

[0017] Figure 5 Is Figure 1 Another schematic cross-sectional structure diagram in the A-A' direction;

[0018] Figure 6 Is Figure 1 Another schematic cross-sectional structure diagram in the A-A' direction;

[0019] Figure 7 Is another schematic plan view of the display panel provided by the embodiment of the present invention;

[0020] Figure 8 Is Figure 7 Schematic cross-sectional structure diagram in the B-B' direction;

[0021] Figure 9 Is Figure 7 Partial enlarged schematic diagram of the M area;

[0022] Figure 10 Is Figure 7 Another schematic cross-sectional structure diagram in the B-B' direction;

[0023] Figure 11 Is Figure 7 Another partial enlarged schematic diagram of the M area;

[0024] Figure 12 Is Figure 11 Schematic diagram of the reversible color-changing layer;

[0025] Figure 13 Is Figure 7 Another partial enlarged schematic diagram of the M area;

[0026] Figure 14 Is Figure 7 Another partial enlarged schematic diagram of the M area;

[0027] Figure 15 Is Figure 7 Partial enlarged schematic diagram of the F area;

[0028] Figure 16 Is the schematic plan view of the display device provided by the embodiment of the present invention. Detailed implementation manners

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present invention or its application or use.

[0031] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification.

[0032] In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof in subsequent drawings is not necessary.

[0034] Please refer to Figures 1-3 , Figure 1 which is a schematic plan view of a display panel provided by an embodiment of the present invention, Figure 2 is Figure 1 a schematic cross-sectional structure view taken along the line A-A' in Figure 3 is Figure 1 another schematic cross-sectional structure view taken along the line A-A' in

[0035] a substrate 10;

[0036] an anode layer 20, the anode layer 20 is located on one side of the substrate 10, and the anode layer 20 includes a plurality of anodes 201;

[0037] a pixel definition layer 30, the pixel definition layer 30 is located on the side of the anode layer 20 away from the substrate 10, the pixel definition layer 30 includes a plurality of openings 30K, the orthographic projection of the opening 30K on the substrate 10 overlaps with the orthographic projection of the anode 201 on the substrate 10, and the opening 30K exposes at least a part of the anode 201;

[0038] a light-emitting layer 40, the light-emitting layer 40 is located on the side of the pixel definition layer 30 away from the substrate 10, the light-emitting layer 40 includes a plurality of light-emitting portions 401, and the light-emitting portions 401 are located within the opening 30K;

[0039] The reversible color-changing layer 50 is located on the side of the anode layer 20 facing away from the substrate 10. The reversible color-changing layer 50 includes a first state and a second state. The transmittance of the reversible color-changing layer 50 in the first state is different from the transmittance of the reversible color-changing layer 50 in the second state, and the transmittance of the reversible color-changing layer 50 in the first state is less than the transmittance of the pixel definition layer 30.

[0040] The reversible color-changing layer 50 includes a plurality of first parts 501. Along the direction X parallel to the plane where the substrate 10 is located, the first parts 501 are at least located between two adjacent openings 30K.

[0041] Specifically, the display panel 000 provided in this embodiment may be an Organic Light Emitting Diode (OLED) display panel. The display panel 000 includes a substrate 10 (not filled in the figure). The substrate 10 is used as a carrier substrate for setting other film layer structures of the display panel 000. Optionally, the substrate 10 may be made of hard materials such as glass and ceramics, or may be a flexible material, such as polymers formed by polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc. The substrate 10 may be any one of a transparent substrate, a semi-transparent substrate, or an opaque substrate, which is not limited in this embodiment. Optionally, a driving circuit layer 60 may be provided on one side of the substrate 10. The driving circuit layer 60 may be provided with a plurality of thin film transistors 601. The plurality of thin film transistors 601 are used to form a driving circuit for providing a driving signal to the display panel 000, such as a pixel circuit. An anode layer 20 is provided on the side of the driving circuit layer 60 away from the substrate 10. The anode layer 20 may form a plurality of anodes 201 through a patterning process. The anodes 201 may be electrically connected to the thin film transistors 601 and are used to transmit the driving signal of the pixel circuit to the anodes 201. Optionally, the anode layer 20 may be formed of various conductive materials. For example, the anode layer 20 may be formed as a transparent anode or a reflective anode according to its own 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), etc. When the anode 201 is formed as a reflective anode, the material of the anode layer 20 may include silver, magnesium, aluminum, etc. or other metal mixtures, which are not specifically limited in this embodiment. A pixel definition layer 30 and a light emitting layer 40 are sequentially provided on the side of the anode layer 20 away from the substrate 10. The pixel definition layer 30 includes a plurality of openings 30K, and the light emitting layer 40 includes a plurality of light emitting portions 401. The orthographic projection of the opening 30K on the substrate 10 overlaps with the orthographic projection of the anode 201 on the substrate 10. The opening 30K exposes at least a part of the anode 201 of the anode layer 20. The light emitting portion 401 is formed in the opening 30K. The pixel definition layer 30 is used to prevent color bleeding and color mixing between two adjacent light emitting portions 401, that is, the opening 30K of the pixel definition layer 30 is used to define the light emitting portions 401 of adjacent organic light emitting materials, so as to separate the light emitting portions 401 of various different colors into relatively independent structures. Optionally, the display panel 000 may include a plurality of sub-pixels 00. One sub-pixel 00 may be correspondingly provided with one light emitting portion 401. The plurality of sub-pixels 00 may include a variety of different colors ( Figure 1are represented by different filling patterns, such as at least including red sub-pixels, green sub-pixels, blue sub-pixels, and may also include white sub-pixels, etc.; the multiple sub-pixels 00 can be arranged in an array on the display panel 000, or may also be in other arrangement manners. In this embodiment, Figure 1 only taking the array arrangement of multiple sub-pixels 00 as an example for illustration. It can be understood that in this embodiment, Figure 1 taking the shape of the positive projection of one sub-pixel 00 onto the light-emitting surface of the display panel 000 as a strip as an example for illustration. In specific implementation, the shape of the sub-pixel 00 includes but is not limited to this shape and can be designed according to actual requirements.

[0042] It can be understood that the display panel 000 in this embodiment includes but is not limited to the above-mentioned film layer structures, and may also include other film layer structures, such as each metal conductive film layer used to fabricate the thin-film transistor 601 in the driving circuit layer 60, such as the cathode layer 70 on the light-emitting layer 40, which can enable the light-emitting part 401 to form a stacked arrangement with the anode 201 and the cathode layer 70. By applying a voltage between the anode 201 and the cathode layer 70, the light-emitting part 401 emits visible light, thereby realizing an image that can be recognized by the user. A thin-film encapsulation layer 80 can also be provided on the side of the cathode layer 70 away from the substrate 10. The thin-film encapsulation layer 80 can be used to isolate water and oxygen, preventing water vapor and oxygen in the air from entering the light-emitting layer 40 and the driving circuit layer 60, thereby damaging the components therein. It may also include other film layer structures, such as a planarization layer, etc. This embodiment will not elaborate here, and specific reference can be made to the structure of an organic light-emitting display panel in related technologies for understanding. Optionally, the thin-film encapsulation layer 80 in this embodiment can 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, preventing water vapor, oxygen, or other impurities in the organic layer 802 from permeating into the light-emitting part 401 of the organic light-emitting material and reacting to damage the organic light-emitting material, resulting in the failure of the display panel. The organic layer 802 is used to relieve stress and avoid the inorganic layer from being broken by stress, allowing water vapor and oxygen to invade. The second inorganic layer 803 is used to prevent water vapor and oxygen in the external environment from invading the display panel 000. Moreover, the first inorganic layer 801 and the second inorganic layer 803 form a double protection, further reducing the probability of being invaded.

[0043] In the related art, when the display panel is a front-facing top-emitting 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 a relatively high reflectivity. Since the opening of the pixel definition layer exposes at least a part of the anode of the anode layer, and the remaining part of the anode does not overlap with the light-emitting part in the opening, the anode in this part of the range is exposed within the range of the pixel definition layer (where the anode in this part of the range refers to the part in contact with the pixel definition layer). Generally, the material of the pixel definition layer is an insulating material with a high transmittance. Therefore, when the display panel is in use and not lit, after the ambient light in the external environment passes through the pixel definition layer and irradiates the anode in this area, the light is easily reflected back, resulting in a relatively high reflectivity of the display panel in this range, thereby affecting the use effect of the display panel.

[0044] To solve the above problems, in this embodiment, the display panel 000 is further provided with a reversible color-changing layer 50. The reversible color-changing layer 50 is located on the 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. The transmittance of the reversible color-changing layer 50 in the first state is different from the transmittance of the reversible color-changing layer 50 in the second state. As Figure 2 and Figure 3 shown, Figure 2 Figure 9 schematically shows a cross-sectional view of the reversible color-changing layer 50 in the first state. Figure 3Schematically shown is a cross-sectional view when the reversible color-changing layer 50 is in the second state. The reversible color-changing layer 50 uses different filling patterns to distinguish different transmittances, that is, the material of the reversible color-changing layer 50 is a reversible and color-changing material. In the first state (such as within a certain temperature range), the transmittance of the reversible color-changing layer 50 is relatively small, while in the second state (such as within another certain temperature range), the transmittance of the reversible color-changing layer 50 is relatively high. Thus, the reversible color-changing layer 50 forms different transmittance sizes in different states. The low transmittance allows the reversible color-changing layer 50 to be used as a light blocker, and the high transmittance allows the reversible color-changing layer 50 to be used as a light transmitter. In this embodiment, it is set that the transmittance of the reversible color-changing layer 50 in the first state is less than the transmittance of the pixel definition layer 30, that is, the transmittance of the reversible color-changing layer 50 in the first state is less than the high transmittance of the pixel definition layer 30. At this time, the transmittance of the reversible color-changing layer 50 in the first state is relatively low compared to the pixel definition layer 30, and the reversible color-changing layer 50 can achieve a light-blocking effect. In this embodiment, it is set that the reversible color-changing layer 50 includes a plurality of first parts 501. Along the direction X parallel to the plane where the substrate 10 is located, the first parts 501 are at least located between two adjacent openings 30K, that is, at least one first part 501 is provided between two adjacent openings 30K of the pixel definition layer 30. Thus, the first parts 501 with a transmittance smaller than that of the pixel definition layer 30 in the first state can be arranged between two adjacent openings 30K. Since the transmittance of the first parts 501 in the first state is less than the transmittance of the pixel definition layer 30, the first parts 501 in the first state can at least block the area where the anode 201 does not overlap with the light-emitting part 401 in the opening 30K (such as Figure 2 the area Q circled by the dotted line in). When external ambient light irradiates on the first parts 501, it will be absorbed by the first parts 501 with a low transmittance instead of being reflected. Thus, the reflection phenomenon caused by external ambient light irradiating on the anode 201 within the range of the area Q can be avoided, which is beneficial to reducing the reflectance of the display panel 000 when it is not lit.

[0045] It can be understood that the reversible color-changing layer 50 of this embodiment can be arranged at any film layer position on the side of the anode layer 20 away from the substrate 10, such as Figure 2 for example, the reversible color-changing layer 50 is located between the pixel definition layer 30 and the anode layer 20, or the reversible color-changing layer 50 can also be arranged on the side of the pixel definition layer 30 away from the anode layer 20 (not shown in the figure), or the reversible color-changing layer 50 can also be arranged at other positions. This embodiment does not make specific limitations, and only needs to satisfy that the reversible color-changing layer 50 is located on the side of the anode layer 20 away from the substrate 10, and the reflectance can be reduced by the first parts 501 with a low transmittance in the first state of the reversible color-changing layer 50.

[0046] It should be noted that the shape of the first part 501 in this embodiment is not specifically limited, and it can be a block shape, a hollow shape, or other shapes. It only needs to satisfy that in the direction X parallel to the plane where the substrate 10 is located, the first part 501 is at least located between two adjacent openings 30K. It should be further noted that the manufacturing material of the reversible color-changing layer 50 in this embodiment is not limited. The manufacturing material of the reversible color-changing layer 50 can be one or more of electrochromic reversible color-changing materials, thermochromic reversible color-changing materials, or photochromic reversible color-changing materials, etc. This embodiment does not make specific limitations, and it only needs 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 less than the transmittance of the pixel definition layer 30, so that the transmittance of the reversible color-changing layer 50 in the first state is relatively low, and the reflection effect of ambient light can be reduced.

[0047] In some alternative embodiments, please continue to refer to Figures 1-3 , in this embodiment, in the direction Z perpendicular to the plane where the substrate 10 is located, the reversible color-changing layer 50 is located between the anode layer 20 and the pixel definition layer 30, and the first part 501 is at least in direct contact with a part of the anode 201.

[0048] This embodiment explains that the reversible color-changing layer 50 can be disposed between the anode layer 20 and the pixel defining layer 30. That is, when manufacturing the display panel 000, after manufacturing the plurality of anodes 201 of the anode layer 20, the reversible color-changing layer 50 can be manufactured to form a plurality of first portions 501, such that the first portions 501 are in direct contact with at least some of the anodes 201. When the display panel 000 is not lit, that is, when the display panel 000 is in the dark state or black state, the reversible color-changing layer 50 does not change color, that is, the reversible color-changing layer 50 is its original color. At this time, the first portions 501 maintain a transmittance smaller than that of the pixel defining layer 30 in the first state. Since the transmittance of the first portions 501 is less than that of the pixel defining layer 30 at this time, even if external ambient light passes through the pixel defining layer 30 with a high transmittance, it can be absorbed by the first portions 501 with a low transmittance, thereby avoiding the reflection phenomenon caused by the external ambient light passing through the pixel defining layer 30 and irradiating the anode 201, which is beneficial to reducing the reflectance of the display panel 000 in the black state or dark state. In this embodiment, the first portions 501 are set to be in direct contact with at least some of the anodes 201, and the manufacturing material of the reversible color-changing layer 50 can be a thermochromic material. After the display panel 000 is lit, that is, when the display panel 000 is displaying an image, a driving signal is transmitted to the anode 201. During the process of the anode 201 transmitting an electrical signal after the display panel 000 is lit, a certain amount of heat will be generated. The first portions 501 are in direct contact with the anode 201, and thus the first portions 501 in direct contact with the anode 201 can undergo a thermochromic effect and change color, and then enter the second state of the first portions 501, that is, the transmittance of the first portions 501 changes. Optionally, the transmittance of the first portions 501 in the second state can be greater than the transmittance of the first portions 501 in the first state, that is, the transmittance of the first portions 501 after thermochromic color change becomes larger, thereby avoiding the influence on the light output effect of the display panel 000 when displaying an image due to the first portions 501 still being in the first state with a low transmittance, which is beneficial to improving the display quality.

[0049] It can be understood that this embodiment only takes the manufacturing material of the reversible color-changing layer 50 as a reversible thermochromic material as an example for illustration. In specific implementation, the manufacturing material of the reversible color-changing layer 50 can also be other reversible color-changing materials. For example, when the reversible color-changing layer 50 is an electrochromic material, since the first portions 501 are in direct contact with the anode 201, after the anode 201 is connected to an electrical signal, the first portions 501 are also correspondingly connected to this electrical signal. At this time, the color (or transmittance) of the first portions 501 will also change. This embodiment does not make a limitation on this. In specific implementation, the reversible color-changing layer 50 can be manufactured according to actual requirements, and only needs to satisfy that the reversible color-changing layer 50 has at least two color states with different transmittances.

[0050] Optionally, the display panel 000 of this embodiment includes a black mode and a bright mode. In the black mode, the reversibly color-changing layer 50 is in a first state; in the bright mode, the reversibly color-changing layer 50 is in a second state. The transmittance of the reversibly color-changing layer 50 in the first state is less than the transmittance of the reversibly color-changing layer 50 in the second state. This embodiment illustrates that the reversibly color-changing layer 50 can have at least two different transmittance states, and when the display panel 000 is in the black mode, i.e., when the display panel 000 is not illuminated and not displaying an image, the reversibly color-changing layer 50 is in the first state, which can also be understood as the original state with no color change. When the display panel 000 is in the bright mode, that is, the display panel 000 is lit to display the 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 the transmittance of the reversible color-changing layer 50 in the first state. That is, after the display panel 000 is lit and generates a certain amount of heat, the first part 501 heats up due to the heat, and its transmittance increases. This can avoid the display panel 000 displaying the picture because the first part 501 is still in the first state with low transmittance, which affects the light-emitting effect of the display panel 000 when displaying the picture, which is beneficial to improving the display quality.

[0051] In some optional embodiments, please refer to Figure 1 , Figure 4 and Figure 5 , Figure 4 yes Figure 1 Another cross-sectional structure diagram along the A-A' direction, Figure 5 yes Figure 1 Another cross-sectional structural diagram along the line AA' is shown. In this embodiment, the display panel 000 further includes a cathode layer. In the direction Z perpendicular to the plane of the substrate 10, the cathode layer 70 is located on the side of the light-emitting layer 40 facing away from the substrate 10.

[0052] The reversible color-changing layer 50 is located on the side of the cathode layer 70 facing away from the substrate 10; or, the reversible color-changing layer 50 is located between the cathode layer 70 and the pixel definition layer 30;

[0053] The first portion 501 is in direct contact with the cathode layer 70 .

[0054] This embodiment explains that the display panel 000 may further include a cathode layer 70 covering the light-emitting portion 401. In the direction Z perpendicular to the plane of the substrate 10, the cathode layer 70 is located on the side of the light-emitting layer 40 away from 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 in the figure) 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. The light-emitting principle of the display panel 000 is that under the driving of a certain electric field force formed between the anode layer 20 and the cathode layer 70, electrons and holes are respectively injected from the cathode layer 70 and the anode 201 into the electron transport layer and the hole transport layer, then migrate to the light-emitting portion 401 of the light-emitting layer 40, and meet in the light-emitting portion 401 to form excitons and excite the light-emitting molecules, and the latter emits visible light through radiative relaxation. As Figure 1 and Figure 4 shown, in this embodiment, the reversible color-changing layer 50 may be disposed on the side of the cathode layer 70 away from the substrate 10, that is, when manufacturing the display panel 000, after manufacturing the cathode layer 70, the reversible color-changing layer 50 can be manufactured to form a plurality of first portions 501, so that the first portions 501 are in direct contact with the cathode layer 70. Or, as Figure 1 and Figure 5 shown, the reversible color-changing layer 50 in this embodiment may also be disposed between the pixel definition layer 30 and the cathode layer 70, that is, when manufacturing the display panel 000, after manufacturing the light-emitting layer 40, the reversible color-changing layer 50 can be manufactured, and then the cathode layer 70 covering the light-emitting portion 401 is manufactured, so that at least the first portions 501 of the reversible color-changing layer 50 are located between the pixel definition layer 30 and the cathode layer 70 outside the opening 30K. At this time, the first portions 501 are 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 the dark state or the black state, the reversible color-changing layer 50 does not change color, that is, the reversible color-changing layer 50 is its original color. At this time, the first portions 501 maintain a transmittance smaller than that of the pixel definition layer 30 in the first state. Therefore, after the external ambient light passes through the high-transmittance thin film encapsulation layer 80 or the cathode layer 70, it can be absorbed by the low-transmittance first portions 501, thereby avoiding the reflection phenomenon caused by the external ambient light irradiating the anode 201, which is beneficial to reducing the reflectance of the display panel 000 in the black state or the dark state.

[0055] In this embodiment, the first part 501 is arranged to be in direct contact with the cathode layer 70. The material for making the reversible color-changing layer 50 can be a thermochromic material. After the display panel 000 is lit, that is, when the display panel 000 is displaying an image, the driving signal is transmitted to the cathode layer 70. During the process of the cathode layer 70 transmitting an electrical signal after the display panel 000 is lit, a certain amount of heat will be generated. The first part 501 is in direct contact with the cathode layer 70, so that the first part 501 in direct contact with the cathode layer 70 undergoes a thermochromic effect and changes color, and then enters the second state of the first part 501, that is, the transmittance of the first part 501 changes. Optionally, the transmittance of the first part 501 in the second state can be greater than the transmittance of the first part 501 in the first state, that is, the transmittance of the first part 501 after thermochromism becomes larger. Thus, when the display panel 000 is displaying an image, it can be avoided that the light output effect of the display panel 000 is affected because the first part 501 is still in the first state with a low transmittance, which is beneficial to improving the display quality.

[0056] It can be understood that this embodiment is only an example to illustrate the possible film layer positions when the reversible color-changing layer 50 is located on the side of the anode layer 20 away from the substrate 10. In actual implementation, the position of the reversible color-changing layer 50 in the display panel 000 includes but is not limited to the above positions. Since the reversible color-changing layer 50 does not need to play an electrical role, it can also be set in other positions, as long as 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 the film layer that generates a certain amount of heat due to the transmission of electrical signals when the display panel 000 is displaying an image), so that the color of the first part 501 can be changed by sensing heat, and then the transmittance of the first part 501 can be changed.

[0057] In some alternative embodiments, please continue to refer to Figures 1-5 , in this embodiment, the color of the reversible color-changing layer 50 in the first state includes one of black or gray.

[0058] This embodiment explains that the original color of the reversible color-changing layer 50 before changing color, that is, its own original color, can include one of black or gray. The transmittance of the black or gray reversible color-changing layer 50 is relatively low, so that the transmittance of the reversible color-changing layer 50 in the first state can be less than the high transmittance of the pixel definition layer 30, and when the display panel 000 is in the dark state or black state, the external ambient light can be absorbed by the first part 501 with a low transmittance of black or gray, thus avoiding the reflection phenomenon caused by the external ambient light irradiating on the anode 201, which is beneficial to reducing the reflectivity of the display panel 000 in the black state or dark state.

[0059] It should be noted that this embodiment is only an example of the colors that the reversible color-changing layer 50 in the first state can include. In actual implementation, the original color of the reversible color-changing layer 50 includes but is not limited to this, and can include other colors, as long as the transmittance of the reversible color-changing layer 50 with the original color in the first state is less than that of the pixel definition layer 30, and it can absorb the external ambient light when the display panel 000 is in the dark state or black state, and avoid the reflection of the external ambient light on the anode 201. This embodiment will not be elaborated here.

[0060] Optionally, please refer to Figure 1 and Figure 6 , Figure 6 is Figure 1 Another schematic cross-sectional structure diagram in the A-A' direction in Figure 6 . The materials of the reversible color-changing layer 50 corresponding to different color sub-pixels 00 in this embodiment can be different ( Figure 6 represented by different filling patterns in), for example, the material of the reversible color-changing layer 50 corresponding to the red sub-pixel 01 (red light-emitting part 401R) can be a material whose color changes from black or gray with low transmittance to red or nearly red with high transmittance after heating, and the material of the reversible color-changing layer 50 corresponding to the green sub-pixel 02 (green light-emitting part 401G) can be a material whose color changes from black or gray with low transmittance to green or nearly green with high transmittance after heating, and the material of the reversible color-changing layer 50 corresponding to the blue sub-pixel 03 (blue light-emitting part 401B) can be a material whose color changes from black or gray with low transmittance to blue or nearly blue with high transmittance after heating. Thus, when the display panel 000 is lit to display an image, the transmittance of the first part 501 becomes smaller after changing color due to heating, avoiding affecting the light-emitting effect, and at the same time, the color of the first part 501 can become close to or the same as the color of its corresponding sub-pixel 00 after heating, thereby further improving the aperture ratio of the display panel 000 and being beneficial to improving the display quality.

[0061] In some alternative embodiments, please refer to Figure 7 and Figure 8 , Figure 7 which is another schematic plan view of the display panel provided by the embodiment of the present invention, Figure 8 is Figure 7 the schematic cross-sectional structure diagram in the B-B' direction in Figure 7 (for clearly showing the structure of this embodiment, Figure 7 transparency filling is performed), in this embodiment, the display panel 000 further includes a thin film encapsulation layer 80, a color filter layer 901, and a black matrix layer 902;

[0062] The thin film encapsulation layer 80 is located on the side of the light-emitting layer 40 away from the substrate 10, and the color filter layer 901 and the black matrix layer 902 are located on the side of the thin film encapsulation layer 80 away from the substrate 10;

[0063] The color filter layer 901 includes a plurality of color resistors 9010, and the orthographic projection of the color resistors 9010 on the substrate 10 overlaps with the orthographic projection of the opening 30K on the substrate 10;

[0064] The black matrix layer 902 includes a plurality of light-shielding bars 9021. Along the direction X parallel to the plane where the substrate 10 is located, the light-shielding bars 9021 are located between two adjacent openings 30K;

[0065] The first part 501 includes a first sub-part 5011, and the orthographic projection of the first sub-part 5011 on the substrate 10 does not overlap with the orthographic projection of the light-shielding bar 9021 on the substrate 10.

[0066] This embodiment explains that the display panel 000 may further include a color filter layer 901 and a black matrix layer 902. Optionally, the color filter layer 901 and the black matrix layer 902 may be disposed on the side of the thin film encapsulation layer 80 facing away from the substrate 10. The color filter layer 901 may include a plurality of color resistors 9010 of different colors. The orthographic projection of the color resistors 9010 on the substrate 10 overlaps with the orthographic projection of the opening 30K on the substrate 10, that is, a color resistor 9010 of one color corresponds to a sub-pixel 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. Along the direction X parallel to the plane where the substrate 10 is located, 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 cross to define the area where the color resistor 9010 is located.

[0067] In an organic light-emitting display panel, since the light-emitting layer 40 made of an organic light-emitting material emits light by itself, a polarizer is not originally required. However, due to the reflection of external light on the cathode layer 70, the contrast of the product is likely to be low. Therefore, in general, a circular polarizer is needed in the organic light-emitting display panel to reduce the reflection of external ambient light. The circular polarizer is generally composed of a common polarizer and a quarter-wave plate. The external ambient light first passes through the polarizer to become linearly polarized light, and then passes through the quarter-wave plate to become circularly polarized light. After reflection, when passing through the quarter-wave plate for the second time, the circularly polarized light becomes linearly polarized light, and the polarization direction is perpendicular to the polarization direction of the incident linearly polarized light, thereby reducing the emission of reflected light. Although the circular polarizer can reduce the reflection of external ambient light and improve the contrast of the organic light-emitting display panel when used outdoors. However, the circular polarizer has problems such as low transmittance, thick thickness, and poor foldability. Therefore, in this embodiment, a color film layer 901 and a black matrix layer 902 are provided on the side of the thin film encapsulation layer 80 facing away from the substrate 10 through a color film manufacturing process to replace the circular polarizer in the organic light-emitting display panel. Using the light filtering principle of the color film, the orthographic projection of the color resistor 9010 on the substrate 10 overlaps with the orthographic projection of the opening 30K on the substrate 10, that is, the color resistor 9010 covers the sub-pixel 00, which can not only play an anti-reflection role but also filter the spectrum of the sub-pixel 00, making the spectrum narrower and the color purity higher, which is beneficial to improving the display effect. The black matrix layer 902 can absorb ambient light, achieving the effect of blocking the reflection of external light and at the same time being beneficial to reducing costs, providing possibilities for the design of flexible products.

[0068] Since in order to ensure the aperture ratio of the display panel 000, the black matrix layer 902 cannot be entirely disposed in the display panel 000, the light-shielding bar 9021 between two adjacent openings 30K needs to be limited within a certain width. At this time, when the light-shielding bar 9021 is not sufficient to cover the anode 201, external ambient light is likely to irradiate and reflect on the anode 201 outside the light-shielding bar 9021. Therefore, the first part 501 of this embodiment includes a first sub-part 5011, and the orthographic projection of the first sub-part 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, along the direction X parallel to the plane where the substrate 10 is located, the light-shielding bar 9021 of the black matrix layer 902 can play a role in absorbing the external ambient light irradiated between two adjacent openings 30K. Setting the first part 501 to include the first sub-part 5011, the first sub-part 5011 can be understood as the region of the reversible color-changing layer 50 that effectively absorbs light, that is, within the range outside the light-shielding bar 9021 of the black matrix layer 902, the first sub-part 5011 of the reversible color-changing layer 50 can be used to reduce the reflectivity, which can avoid setting the light-shielding bar 9021 of the black matrix layer 902 too wide and affecting the aperture ratio of the display panel 000.

[0069] In some alternative embodiments, please continue to refer to Figure 7 and Figure 8 , in this embodiment, the orthographic projection of the anode 201 on the substrate 10 is the first projection N1, and the orthographic projection of the opening 30K on the substrate 10 is the 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;

[0070] The anode 201 includes a second part 2011, and the second part 2011 is the part where the first projection N1 exceeds the second projection N2;

[0071] The orthographic projection of the first sub - part 5011 on the substrate 10 overlaps with the orthographic projection of the second part 2011 on the substrate 10.

[0072] This embodiment explains that generally, the orthographic projection (the first projection N1) of the anode 201 in the anode layer 20 on the substrate 10 is larger than the orthographic projection (the second projection N2) of the opening 30K on the substrate 10, and the first projection N1 covers the second projection N2. Thus, when the organic light - emitting material can be evaporated into the opening 30K, it can be ensured that the pixel - defining layer 30 cannot cover the anode 201 completely, and the organic light - emitting material overflows outside the anode 201, affecting the display quality. At this time, because the area where the anode 201 exceeds the opening 30K, that is, the second part 2011, has a high reflectivity. Therefore, in this embodiment, the orthographic projection of the first sub - part 5011 where the first part 501 does not overlap with the light - shielding strip 9021 on the substrate 10 overlaps at least with the orthographic projection of the second part 2011 of the anode 201 on the substrate 10, so as to better solve the problem of the external ambient light being reflected on the second part 2011 of the anode 201 due to the light transmission of the pixel - defining layer 30.

[0073] In some alternative embodiments, please refer to Figure 7 , Figure 9 and Figure 10 , Figure 9 is Figure 7 a partial enlarged schematic diagram of the M region in Figure 10 is Figure 7 another cross - sectional structure schematic diagram in the B - B' direction in (for clearly showing the structure of this embodiment, Figure 9 transparency filling is performed). In this embodiment, the display panel 000 includes a plurality of sub - pixels 00 of different colors, and the plurality of sub - pixels of different colors at least include blue sub - pixels 03, green sub - pixels 02, and red sub - pixels 01;

[0074] In the reversible color-changing layer 50, the orthographic projection area of the first sub-part 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is S1, the orthographic projection area of the first sub-part 5011G corresponding to the green sub-pixel 02 on the substrate 10 is S2, and the orthographic projection area of the first sub-part 5011R corresponding to the red sub-pixel 01 on the substrate 10 is S3; wherein, S1 < S2 and S1 < S3. Optionally, S2 < S3.

[0075] This embodiment explains that the display panel 000 includes a plurality of sub-pixels 00 of different colors. The plurality of sub-pixels of different colors at least include a blue sub-pixel 03, a green sub-pixel 02, and a red sub-pixel 01. The light-emitting part 401 corresponding to the blue sub-pixel 03 is a blue light-emitting part 401B, the light-emitting part 401 corresponding to the green sub-pixel 02 is a green light-emitting part 401G, and the light-emitting part 401 corresponding to the red sub-pixel 01 is a red light-emitting part 401R. Since there are different degrees of reflection when light irradiates the surfaces of the sub-pixels 00 of different colors, when the display panel 000 is not lit, the reflected light ratio a*b* after the reflection of the blue sub-pixel 03, the green sub-pixel 02, and the red sub-pixel 01 needs to be close to 0 (here 0 represents black. The Lab color space was developed by the International Commission on Illumination in 1976. The Lab color space uses three mutually perpendicular coordinate axes L*, a*, and b* to represent a color space. The L* axis represents lightness, with black at the bottom and white at the top, +a* represents magenta, -a* represents green, +b* represents yellow, -b* represents blue, the a* axis is the red-green axis, and the b* axis is the yellow-blue axis. The hue and characteristics of any color can be represented by the a* and b* values). That is, after reflection, it presents a black state (the reflected light ratio a*b* needs to be close to 0) rather than other color casts such as cyan or blue. Therefore, in this embodiment, in order to make the display panel 000 present 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 not lit, the areas of the first sub-parts 5011 corresponding to the sub-pixels 00 of different colors are set to be different. Specifically, in the reversible color-changing layer 50, the orthographic projection area S1 of the first sub-part 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is smaller than the orthographic projection area S2 of the first sub-part 5011G corresponding to the green sub-pixel 02 on the substrate 10, and the orthographic projection area S1 of the first sub-part 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is also smaller than the orthographic projection area S3 of the first sub-part 5011R corresponding to the red sub-pixel 01 on the substrate 10. Further optionally, the orthographic projection area S2 of the first sub-part 5011G corresponding to the green sub-pixel 02 on the substrate 10 is smaller than the orthographic projection area S3 of the first sub-part 5011R corresponding to the red sub-pixel 01 on the substrate 10, that is, the orthographic projection area S3 of the first sub-part 5011R corresponding to the red sub-pixel 01 on the substrate 10 is the largest, and the orthographic projection area S1 of the first sub-part 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is the smallest, so as to balance the hue and make the display panel 000 present a better black state effect after the light is reflected by the blue sub-pixel 03, the green sub-pixel 02, and the red sub-pixel 01 when not lit, and avoid color cast.

[0076] It should be noted that setting the areas of the first sub-parts 5011 corresponding to the sub-pixels 00 of different colors in this embodiment can include various methods, such as Figure 9As shown, the orthographic projection shapes of the first sub-parts 5011 corresponding to different color sub-pixels 00 on the substrate 10 are designed to be different, or alternatively, the widths of the light-shielding bars 9021 corresponding to different color sub-pixels 00 can be set to be different to expose different areas of the first sub-parts 5011. Specifically, during implementation, it can be selected and set according to actual requirements, and this embodiment does not make any limitations.

[0077] Optionally, please refer to Figure 7 、 Figure 11 and Figure 12 , Figure 11 is Figure 7 another partial enlarged schematic diagram of the M area in Figure 12 is Figure 11 the schematic diagram of the reversible color-changing layer in (for clearly showing the structure of this embodiment, Figure 11 transparency filling is performed). In this embodiment, in the reversible color-changing layer 50, the orthographic projection shape of the first sub-part 5011R corresponding to the red sub-pixel 01 on the substrate 10 is annular, and the orthographic projection shape of the first sub-part 5011G corresponding to the green sub-pixel 02 on the substrate 10 is semi-annular.

[0078] This embodiment explains that in order to make the display panel 000 present a better black state when not lit, after the light is reflected by the blue sub-pixel 03, the green sub-pixel 02, and the red sub-pixel 01, it can be achieved that the areas of the first sub-parts 5011 corresponding to different color sub-pixels 00 are different by designing the orthographic projection shapes of the first sub-parts 5011 corresponding to different color sub-pixels 00 to be different. Specifically, the orthographic projection shape of the first sub-part 5011R corresponding to the red sub-pixel 01 on the substrate 10 is annular, and the orthographic projection shape of the first sub-part 5011G corresponding to the green sub-pixel 02 on the substrate 10 is semi-annular. At this time, the width DR of the first sub-part 5011R corresponding to the red sub-pixel 01 and the width DG of the first sub-part 5011G corresponding to the green sub-pixel 02 can be the same, that is, in the reversible color-changing layer 50, the widths of the first parts 501 corresponding to different color sub-pixels 00 can be the same, and the widths of the light-shielding bars 9021 in the black matrix layer 902 located at adjacent openings 30K can also be the same. Only by setting the shapes of the first sub-parts 5011 to be annular or semi-annular to be different, the areas of the first sub-parts 5011 corresponding to different color sub-pixels 00 can be made different. Furthermore, it is beneficial to make the display panel 000 present a better black state when not lit, avoid color deviation, and at the same time, it can reduce the manufacturing process difficulty and improve the manufacturing process efficiency.

[0079] Further optionally, as Figure 7 、 Figure 11 and Figure 12As shown, the first part 501 is not provided at the position corresponding to the blue sub-pixel 03. That is, in order to achieve that the orthographic projection area S1 of the first sub-part 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is smaller than the orthographic projection area S2 of the first sub-part 5011G corresponding to the green sub-pixel 02 on the substrate 10, and the orthographic projection area S1 of the first sub-part 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is also smaller than the orthographic projection area S3 of the first sub-part 5011R corresponding to the red sub-pixel 01 on the substrate 10. And the orthographic projection area S3 of the first sub-part 5011R corresponding to the red sub-pixel 01 on the substrate 10 is the largest, and the orthographic projection area S1 of the first sub-part 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is the smallest. The first part 501 can also not be provided at the position corresponding to the blue sub-pixel 03, that is, the orthographic projection area S1 of the first sub-part 5011B corresponding to the blue sub-pixel 03 on the substrate 10 is 0. Thus, while saving the manufacturing materials of the reversible color-changing layer 50 and reducing the cost, the effect of reducing the reflectivity of the display panel 000 in the black state can also be achieved.

[0080] Optionally, please continue to refer to Figure 7 and Figure 10 , in this embodiment, along the direction X parallel to the plane where the substrate 10 is located, the width of the first sub-part 02 corresponding to the red sub-pixel 01 is D1;

[0081] Along the direction X parallel to the plane where the substrate 10 is located, the width of the first sub-part 5011G corresponding to the green sub-pixel is D2; where D1 > D2.

[0082] This embodiment explains that in order to make the light reflected by the blue sub-pixel 03, the green sub-pixel 02, and the red sub-pixel 01 present a better black state when the display panel 000 is not lit, the widths of the light-shielding bars 9021 corresponding to different color sub-pixels 00 can be set differently to expose different areas of the first sub-part 5011, so as to achieve different areas of the first sub-part 5011 corresponding to different color sub-pixels 00. Specifically, along the direction X parallel to the plane of the substrate 10, the width of the first sub-part 02 corresponding to the red sub-pixel 01 is D1; along the direction X parallel to the plane of the substrate 10, the width of the first sub-part 5011G corresponding to the green sub-pixel 02 is D2; where D1 > D2. Optionally, along the direction X parallel to the plane of the substrate 10, the width of the first sub-part 5011B corresponding to the blue sub-pixel 03 is D3, and D2 > D3. At this time, the orthographic projection shapes of the first sub-parts 5011 corresponding to different color sub-pixels 00 on the substrate 10 can all be annular (without attached planar structure diagram) or other shapes. Only by setting the widths of the light-shielding bars 9021 corresponding to different color sub-pixels 00 differently can the areas of the first sub-parts 5011 corresponding to different color sub-pixels 00 be made different, thereby making the light reflected by the blue sub-pixel 03, the green sub-pixel 02, and the red sub-pixel 01 present a better black state when the display panel 000 is not lit and avoiding color cast.

[0083] Optionally, please refer to Figure 7 and Figure 13 , Figure 13 is Figure 7 another partial enlarged schematic diagram of the M area in Figure 13 (in order to clearly show the structure of this embodiment,

[0084] Optionally, please refer to Figure 7 and Figure 14 , Figure 14 is Figure 7 another partial enlarged schematic diagram of the M area in Figure 14(with transparency filling), in this embodiment, the first part 501 includes a segmented ring structure. The first part 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 explains that the first part 501 where the reversible color-changing layer 50 is provided can be a segmented ring structure. The first part 501 of this segmented ring structure includes a plurality of first segments 5010, and the plurality of first segments 5010 can be evenly arranged around 30K to absorb the external ambient light irradiated on the area not covered by the light-shielding strip 9021, and reduce the reflectivity when the display panel 000 is not lit.

[0085] It can be understood that this embodiment is only an example to illustrate the shape that the first part 501 of the reversible color-changing layer 50 can be set. In specific implementation, it includes but is not limited to this. The first part 501 of the reversible color-changing layer 50 can also be other set shapes, which will not be elaborated in this embodiment.

[0086] In some alternative embodiments, please refer to Figure 7 and Figure 15 , Figure 15 is Figure 7 a partial enlarged schematic diagram of the F area in Figure 15 (for clearly showing the structure of this embodiment,

[0087] with transparency filling). In this embodiment, the display panel 000 includes a plurality of pixel units P, and the pixel unit P includes a plurality of sub-pixels 00 of different colors; the plurality of sub-pixels of different colors at least include a first sub-pixel 001;

[0088]

[0089] 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;

[0090] In the second pixel unit P2, the orthographic projection of the first part 501 corresponding to the first sub-pixel 001 on the substrate 10 is a second pattern;

[0091] The shape of the first pattern is different from the shape of the second pattern.This embodiment explains that in different pixel units P in the display panel 000, the shapes of the first portions 501 corresponding to the same-color sub-pixels 00 in the positive projection on the substrate 10 are different. Specifically, the display panel 000 includes a plurality of pixel units P, and each pixel unit P includes a plurality of sub-pixels 00 of different colors. Optionally, one pixel unit P may include at least three different-color sub-pixels 00. 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. If one pixel unit P includes at least a first sub-pixel 001, then the first sub-pixel 001 may be any one of the red sub-pixel 01, the green sub-pixel 02, or the blue sub-pixel 03. In this embodiment, a plurality of pixel units P are provided, including at least a first pixel unit P1 and a second pixel unit P2. Optionally, the first pixel unit P1 and the second pixel unit P2 may be two adjacent pixel units P in the display panel 000 (such as Figure 15 the two pixel units P in the F region shown). They may also be two non-adjacent pixel units P. In the first pixel unit P1, the positive projection of the first portion 501 corresponding to the first sub-pixel 001 on the substrate 10 is a first pattern. Then, in the second pixel unit P2, the positive projection of the first portion 501 corresponding to the same-color first sub-pixel 001 on the substrate 10 is a second pattern, and the shape of the first pattern is different from the shape of the second pattern. As Figure 15 shown, the shape of the first pattern is a closed ring, while the shape of the second pattern is a segmented ring; or the shape of the first pattern is a segmented ring, while the shape of the second pattern is a closed ring; or, the shapes of the first pattern and the second pattern are other different shapes (such as a ring with a curvature, a two-segment structure designed around the opening 30K). This embodiment does not make a limitation. Thus, by designing the shapes of the first portions 501 corresponding to the same-color sub-pixels 00 in different pixel units P to be different, diffraction phenomena can be avoided through the aperiodic shape arrangement of the first portions 501, and the display effect of the display panel 000 can be improved.

[0092] In some alternative embodiments, please refer to Figure 16 , Figure 16 which is a schematic plan view of the display device provided by an embodiment of the present invention. The display device 111 provided in this embodiment includes the display panel 000 provided by the above embodiment of the present invention. Figure 16 This embodiment only takes a mobile phone as an example to illustrate the display device 111. It can be understood that the display device 111 provided by the embodiments of the present invention may be other display devices 111 with a display function, such as a computer, a television, a vehicle-mounted display device, etc. The present invention does not make a specific limitation in this regard. The display device 111 provided by the embodiments of the present invention has the beneficial effects of the display panel 000 provided by the embodiments of the present invention. For specific descriptions of the display panel 000, reference may be made to the above embodiments, and details are not repeated herein.

[0093] 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:

[0094] The present invention provides that the display panel includes a reversible color-changing layer, which is located on the side of the anode layer facing away from the substrate. The reversible color-changing layer includes 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 material of the reversible color-changing layer is a reversible and color-changing material, so that the reversible color-changing layer forms different transmittances in different states. A low transmittance can make the reversible color-changing layer be used as a light-shielding layer, and a high transmittance can make the reversible color-changing layer be used as a light-transmitting layer. The present invention provides that the transmittance of the reversible color-changing layer in the first state is less than that of the pixel definition layer. At this time, the transmittance of the reversible color-changing layer in the first state is relatively low compared with that of the pixel definition layer, and the reversible color-changing layer can play a light-shielding effect. The present invention provides that the reversible color-changing layer includes a plurality of first parts. Along the direction parallel to the plane of the substrate, the first parts are at least located between two adjacent openings of the pixel definition layer. Since the transmittance of the first part in the first state is less than that of the pixel definition layer, the first part in the first state can at least block the area where the anode does not overlap with the light-emitting part in the opening. When external ambient light irradiates on the first part, it will be absorbed by the first part with a low transmittance instead of being reflected, so as to avoid the reflection phenomenon caused by the external ambient light irradiating on the anode in this area range, which is beneficial to reducing the reflectivity of the display panel when it is not lit.

[0095] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A display panel, characterized in that, include: substrate; an anode layer, the anode layer being located on one side of the substrate and comprising a plurality of anodes; a pixel definition layer, the pixel definition layer being located on a side of the anode layer facing away from the substrate, the pixel definition layer comprising a plurality of openings, the orthographic projections of the openings on the substrate overlapping the orthographic projections of the anode on the substrate, and the openings exposing at least a portion of the anode; a light-emitting layer, the light-emitting layer being located on a side of the pixel definition layer facing away from the substrate, the light-emitting layer comprising a plurality of light-emitting portions, and the light-emitting portions being located within the opening; a reversible color-changing layer, the reversible color-changing layer being located between the anode layer and the pixel definition layer, the reversible color-changing layer including a first state and a second state, the transmittance of the reversible color-changing layer in the first state being different from the transmittance of the reversible color-changing layer in the second state, and the transmittance of the reversible color-changing layer in the first state being less than the transmittance of the pixel definition layer; The reversible color-changing layer includes a plurality of first portions. Along a direction parallel to the plane where the substrate is located, the first portion is located at least between two adjacent openings, and the first portion is in direct contact with at least a portion of the anode.

2. The display panel according to claim 1, wherein The color of the reversibly color-changing layer in the first state includes one of black and gray.

3. The display panel according to claim 1, characterized in that, The display panel includes a black state mode and a bright state mode; In the black state mode, the reversibly color-changing layer is in the first state; In the bright state mode, the reversibly color-changing layer is in the second state; The transmittance of the reversibly color-changing layer in the first state is smaller than the transmittance of the reversibly color-changing layer in the second state.

4. The display panel according to claim 1, wherein The display panel further includes a thin film encapsulation layer, a color filter layer, and a black matrix layer; The thin film encapsulation layer is located on a side of the light emitting layer away from the substrate, and the color filter layer and the black matrix layer are located on a side of the thin film encapsulation layer away from the substrate; The color filter layer includes a plurality of color resists, and the orthographic projection of the color resists on the substrate overlaps with the orthographic projection of the opening on the substrate; The black matrix layer includes a plurality of light shielding strips, and the light shielding strips are located between two adjacent openings along a direction parallel to the plane where the substrate is located; The first portion includes a first sub-portion, and an orthographic projection of the first sub-portion on the substrate does not overlap with an orthographic projection of the light-shielding strip on the substrate.

5. The display panel according to claim 4, wherein, The display panel includes a plurality of sub-pixels of different colors, wherein the plurality of sub-pixels of different colors include at least a blue sub-pixel, a green sub-pixel, and a red sub-pixel; In the reversible color-changing layer, the first sub-portion corresponding to the blue sub-pixel has an orthographic projection area on the substrate of S1, the first sub-portion corresponding to the green sub-pixel has an orthographic projection area on the substrate of S2, and the first sub-portion corresponding to the red sub-pixel has an orthographic projection area on the substrate of S3; wherein, S1<S2, S1<S3.

6. The display panel according to claim 5, wherein S2<S3.

7. The display panel according to claim 5, wherein In the reversible color-changing layer, the orthographic projection shape of the first sub-portion corresponding to the red sub-pixel on the substrate is a ring, and the orthographic projection shape of the first sub-portion corresponding to the green sub-pixel on the substrate is a semi-ring.

8. The display panel according to claim 5, wherein in a direction parallel to the plane of the substrate, the width of the first sub - portion corresponding to the red sub - pixel is D1; in a direction parallel to the plane of the substrate, the width of the first sub - portion corresponding to the green sub - pixel is D2; where D1 > D2.

9. The display panel according to claim 5, wherein In the reversible color - changing layer, the first portion is not provided at a position corresponding to the blue sub - pixel.

10. The display panel according to claim 4, wherein The positive projection of the anode on the substrate is a first projection, and the positive projection of the opening on the substrate is a second projection. The area of the first projection is larger than the area of the second projection, and the first projection covers the second projection; The anode includes a second portion, and the second portion is the part where the first projection exceeds the second projection; The positive projection of the first sub - portion on the substrate overlaps with the positive projection of the second portion on the substrate.

11. The display panel according to claim 1, wherein The first portion includes a closed - loop structure, and the first portion is arranged around the opening.

12. The display panel according to claim 1, wherein The first portion includes a segmented - loop structure, and the first portion includes a plurality of first segments, and the plurality of first segments are arranged at intervals around the opening.

13. The display panel according to claim 1, wherein The reversible color - changing layer includes one or more of electro - reversible color - changing materials, thermo - reversible color - changing materials, or photo - reversible color - changing materials.

14. The display panel according to claim 1, wherein The display panel includes a plurality of pixel units, and each pixel unit includes a plurality of sub - pixels of different colors; the plurality of sub - pixels of different colors at least include a first sub - pixel; The plurality of pixel units at least include a first pixel unit and a second pixel unit; In the first pixel unit, the positive projection of the first portion corresponding to the first sub - pixel on the substrate is a first pattern; In the second pixel unit, the positive projection of the first portion corresponding to the first sub - pixel on the substrate is a second pattern; The shape of the first pattern is different from the shape of the second pattern.

15. A display device, characterized in that, A display panel according to any one of claims 1 - 14 is included.

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