CN112802885A

CN112802885A - Display panel and display device

Info

Publication number: CN112802885A
Application number: CN202110204068.1A
Authority: CN
Inventors: 高昕伟; 臧丹丹; 陈琦鹤; 李朋
Original assignee: BOE Technology Group Co Ltd; Hefei BOE Zhuoyin Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Hefei BOE Joint Technology Co Ltd; Hefei BOE Zhuoyin Technology Co Ltd
Priority date: 2021-02-23
Filing date: 2021-02-23
Publication date: 2021-05-14

Abstract

The present disclosure relates to a display panel and a display device, wherein the display panel includes: driving the back plate; a light emitting device positioned at one side of the driving back plate and having a first device for emitting light to one side and a second device capable of displaying an image in a first display mode or a second display mode in which the second device is for emitting light to both sides; in the second display mode, the second device is switchable between a transparent state and a light-shielding state. Through the technical scheme provided by the disclosure, the display panel has the function of displaying on both sides simultaneously or the function of randomly adjusting the transparency of the display panel when the display panel displays.

Description

Display panel and display device

Technical Field

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

Background

Currently, in the field of display technology, double-sided image display and transparency-switched display are essential trends in display panel development. However, the conventional display panel can normally display an image only on one side of the display panel, and cannot realize a function of simultaneously displaying images on both sides of the display panel. Meanwhile, the conventional display panel does not have a function of arbitrarily adjusting the transparency of the display panel when the display panel displays.

Therefore, how to manufacture a display panel capable of displaying images on both sides simultaneously or arbitrarily adjusting transparency is a problem to be solved.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of the present disclosure is to overcome the above-mentioned disadvantages of the prior art, and to provide a display panel and a display device capable of having a function of simultaneous display on both sides or a function of arbitrarily adjusting transparency of the display panel when the display panel performs display.

A first aspect of the present disclosure provides a display panel, including:

driving the back plate;

a light emitting device positioned at one side of the driving back plate and having a first device for emitting light to one side and a second device capable of displaying an image in a first display mode or a second display mode in which the second device is for emitting light to both sides; in the second display mode, the second device is switchable between a transparent state and a light-shielding state.

In an exemplary embodiment of the present disclosure, the driving backplate has a transparent region and an opaque region, the first device includes:

a first anode layer, the first anode layer being an opaque anode layer, and a projection of the first anode layer on the driving backplane being located in the opaque region;

a first light emitting element located at one side of the first anode layer away from the driving back plate;

and the first cathode layer is positioned on one side of the first light-emitting element far away from the driving back plate.

In an exemplary embodiment of the present disclosure, the second device includes:

the second anode layer is a transparent anode layer, the projection of the second anode layer on the driving back plate is positioned in the transparent area, and the second anode layer and the first anode layer are arranged on the same side;

the second light-emitting element is positioned on one side, far away from the driving back plate, of the second anode layer;

and the second cathode layer is arranged on one side of the second light-emitting element far away from the driving back plate.

In one exemplary embodiment of the present disclosure, the second light emitting element includes:

a hole injection layer located on one side of the second anode layer away from the driving back plate;

the hole transport layer is positioned on one side of the hole injection layer, which is far away from the driving backboard;

the light-emitting layer is positioned on one side of the hole transport layer, which is far away from the driving backboard;

an electron transport layer covering the surface of the light emitting layer;

and the electron injection layer covers the surface of the electron transmission layer, and the second cathode layer is positioned on one side of the electron injection layer, which is far away from the driving back plate.

In one exemplary embodiment of the present disclosure, the structure of the first light emitting element and the structure of the second light emitting element are the same.

In an exemplary embodiment of the present disclosure, the reflectivity of the second cathode layer is at least 1.05 times the reflectivity of the second anode layer.

the third anode layer is a transparent anode layer, and the projection of the third anode layer on the driving back plate is positioned in the transparent area and is arranged at the same side as the first anode layer;

the transparency conversion layer is positioned on one side, away from the driving back plate, of the third anode layer, and can switch transparency between a transparent state and a shading state;

and the third cathode layer is arranged on one side of the transparency conversion layer, which is far away from the driving back plate.

In an exemplary embodiment of the present disclosure, the material of the transparency conversion layer is one or more of tungsten trioxide, molybdenum trioxide, titanium dioxide, viologen, and a polymer of 3, 4-ethylenedioxythiophene monomer.

In an exemplary embodiment of the present disclosure, the light emitting device further includes:

the pixel definition layer is arranged on one side of the driving back plate and is arranged on the same side as the first device and the second device; the pixel defining layer has a plurality of pixel defining parts, and one pixel defining part is disposed between each of the first and second devices to separate the first and second devices.

A second aspect of the present disclosure provides a display device including the display panel of any one of the above.

The technical scheme provided by the disclosure can achieve the following beneficial effects:

the display panel provided by the present disclosure includes a driving backplane and a light emitting device. Wherein the light emitting device has a first device which can be used to emit light to one side and a second device which can display an image in a first display mode or a second display mode.

First, in the first display mode, the second device can be used to emit light to both sides. Therefore, compared with the prior art, the display panel can have the function of emitting light simultaneously from two sides by arranging the second device.

Second, in the second display mode, the second device can be switched between a transparent state and a light-shielding state. Therefore, compared with the prior art, the second device is arranged, so that the transparency of the display panel can be adjusted at will in the display process, and transparent display and non-transparent display of the display panel can be realized.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 illustrates a schematic structural diagram of a display panel according to an exemplary embodiment of the present disclosure;

FIG. 2 shows a schematic structural diagram of a second device according to an exemplary embodiment of the present disclosure;

fig. 3 shows a schematic structural diagram of a second device according to another exemplary embodiment of the present disclosure.

Description of reference numerals:

1. a substrate; 2. a buffer layer; 3. a first active layer; 4. a first gate insulating layer; 5. a first gate layer; 6. an interlayer insulating layer; 7. a first source electrode; 8. a first drain electrode; 9. a second gate layer; 10. a second gate insulating layer; 11. a second active layer; 12. a passivation layer; 13. a second source electrode; 14. a second drain electrode; 15. a second planarizing layer; 16. a protective layer; 17. a first device; 18. a second device; 19. a cathode layer; 20. a pixel defining section; 21. a packaging layer; 171. a first anode layer; 172. a first light emitting element; 181. a second anode layer; 182. a second light emitting element; 183. a third anode layer; 184. a transparency conversion layer; 191. a second cathode layer; 192. a third cathode layer; 1821. a hole injection layer; 1822. a hole transport layer; 1823. a light emitting layer; 1824. an electron transport layer; 1825. an electron injection layer.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details.

It is noted that references herein to "on … …", "formed on … …" and "disposed on … …" can mean that one layer is formed or disposed directly on another layer or that one layer is formed or disposed indirectly on another layer, i.e., there is another layer between the two layers.

The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

It should be noted that, although the terms "first", "second", etc. may be used herein to describe various elements, components, elements, regions, layers and/or sections, these elements, components, elements, regions, layers and/or sections should not be limited by these terms. Rather, these terms are used to distinguish one element, component, element, region, layer or section from another.

In the present disclosure, unless otherwise specified, the term "disposed on the same layer" is used to mean that two layers, components, members, elements or portions can be formed by the same patterning process, and the two layers, components, members, elements or portions are generally formed of the same material.

A first aspect of the present disclosure provides a display panel having a function of simultaneous display on both sides or a function of arbitrarily adjusting transparency of the display panel when the display panel performs display.

Specifically, the display panel may include: driving the back plate and the light emitting device. As shown in fig. 1, the driving backplane may include a substrate 1, and a first active layer 3, a first gate insulating layer 4, a first gate layer 5, and a first source drain layer sequentially disposed on the substrate 1. The material of the substrate 1 may be one of glass, polyolefin, polyether ketone, polyimide, polyethylene terephthalate, polyacrylate, silicone, polyethylene, glass resin, polycarbonate, fluoropolymer, and polyester, or a copolymer, a mixture, and a laminate of the above materials, but is not limited thereto, and other materials of the substrate 1 may also be used, and all of them are within the protection scope of the present disclosure.

The first source drain layer may include: a first source 7, a first source 7 trace, a first drain 8 and a first drain 8 trace. The first source electrode 7 and the first drain electrode 8 may be respectively connected to the first active layer 3 through a via hole on the first gate insulating layer 4, the first source electrode 7 and the first source electrode 7 trace may be integrally formed, and the first drain electrode 8 trace may be integrally formed, but the invention is not limited thereto.

In one embodiment of the present disclosure, the driving back plate may further include a buffer layer 2, an interlayer insulating layer 6, and a first planarization layer. The buffer layer 2 can be arranged between the substrate 1 and the active layer to play a role of buffering; an interlayer insulating layer 6 may be disposed between the first gate layer 5 and the first source drain layer for insulating the first gate layer 5 and the first source drain layer; the first planarization layer is arranged on the surface of the source drain layer far away from the substrate 1 to play a role in planarization, so that the arrangement of pixels in the later period is facilitated. The thickness of the first planarizing layer may be 1000 nm to 3000 nm, but is not limited thereto, and the specific thickness of the first planarizing layer may be set according to actual needs. The material of the first planarizing layer may be a resin, but is not limited thereto, and may be another material.

Further, when the driving backplate has two source drain layers, the driving backplate may further include: a second gate layer 9, a second gate insulating layer 10, a second active layer 11, a passivation layer 12, and a second source drain layer. The second gate layer 9 may be disposed on the same layer as the first source/drain layer, or on a side of the first source/drain layer away from the substrate. The second gate insulating layer 10 covers the second gate layer 9 to insulate the second gate layer 9 from the first source drain layer and the second active layer 11; the second active layer 11 is disposed on a side of the second gate insulating layer 10 away from the substrate 1; the passivation layer 12 may cover the second active layer 11, and a via hole may be disposed on the passivation layer 12.

The second source drain layer may include: a second source 13, a second source 13 trace, a second drain 14 and a second drain 14 trace. The second source electrode 13 and the second drain electrode 14 may be respectively connected to the second active layer 11 through a via on the passivation layer 12, the second source electrode 13 and the second source electrode 13 trace may be integrally formed, and the second drain electrode 14 trace may be integrally formed, but are not limited thereto.

Furthermore, in order to further ensure the arrangement of the pixels in the later period, a second planarization layer 15 may be disposed on the side of the second source/drain layer away from the substrate 1, so as to planarize the whole driving backplane, and thus provide a planarized surface for the pixels in the later period. The thickness of the second planarizing layer 15 may be 1000 nm to 3000 nm, but is not limited thereto, and the specific thickness of the second planarizing layer 15 may be set according to actual needs. The material of the second planarizing layer 15 may be a resin, but is not limited thereto, and may be another material.

In addition, in order to protect the driving backplate from being damaged by external water and oxygen, a protective layer 16 may be provided on the second planarization layer 15. The thickness of the protection layer 16 may be between 100 nm and 400 nm, and the material of the protection layer 16 may be one or more of silicon oxide, silicon nitride, or silicon oxynitride, but is not limited thereto, and the material of the protection layer 16 may also be selected from other materials according to the actual situation, which is also within the protection scope of the present disclosure.

In one embodiment of the present disclosure, the driving backplate may have a transparent region and an opaque region. It should be noted that: the transparent region of the actuating backplane does not indicate that the region has one hundred percent light transmittance, but merely that no light-blocking elements are disposed in the region, and all light-blocking elements are disposed within the opaque region. Also, the opacity of an opaque region as described herein does not mean complete occlusion, since the opaque element is not capable of completely blocking light, but rather means that the opaque region has a low light transmission relative to the light transmission of the transparent region.

The first active layer 3, the first gate layer 5, the first source drain layer, the second gate layer 9, the second active layer 11 and the second source drain layer have the ability of shading light, so that light can be blocked. Therefore, in the driving backplane provided by the present disclosure, the first active layer 3, the first gate layer 5, the first source drain layer, the second gate layer 9, the second active layer 11, and the second source drain layer may be disposed in the opaque region, but are not limited thereto, and may also be disposed according to actual situations.

The above-described light emitting device may be located at one side of the driving back plate, and the light emitting device may have a first device 17 and a second device 18. Wherein the first device 17 may be used to emit light to one side and the second device 18 may be capable of displaying an image in the first display mode or the second display mode. In the first display mode, the second device 18 may be used to emit light to both sides; in the second display mode, the second device 18 can be switched between a transparent state and a light-shielding state. By providing the second device 18, the display panel can have a function of emitting light simultaneously on both sides in the first display mode, and can have a function of switching between transparent display and opaque display in real time in the second display mode.

The first device 17 may comprise a first anode layer 171, and a projection of the first anode layer 171 onto the driving backplane may be located in an opaque region of the driving backplane and may be connected to the first drain electrode 8. Meanwhile, the first anode layer 171 may be an opaque anode layer for blocking light, thereby making the first device 17 a bottom emission type, and thus making the first device 17 emit light only to one side. However, the first anode layer 171 may be a transparent anode, and when the first anode layer 171 is a transparent anode, the first device 17 may be configured to emit light to both sides. However, the low light transmittance of the opaque regions results in a weak intensity of light emitted by first devices 17 toward the driven backplane compared to light emitted by first devices 17 away from the driven backplane.

In one embodiment of the present disclosure, the first anode layer 171 may be formed on the driving back plate using one or more of sputtering, e-beam evaporation, spin coating, baking, and photolithography. The first anode layer 171 may be made of indium tin oxide, indium zinc oxide, nano silver electrode, conductive polymer material, carbon nanotube, graphene, electrospun nano copper wire, and printed metal mesh, but is not limited thereto, and other materials may also be used.

Further, the first device 17 may further include a first light emitting element 172 and a first cathode layer. The first light emitting element 172 may be formed by one or more of evaporation and inkjet printing, and may be located on a side of the first anode layer 171 away from the driving backplane, and the first light emitting element 172 may be an organic electroluminescent element.

The first cathode layer may be a transparent cathode layer, which may be fabricated by one or more of thermal evaporation, electron beam evaporation, and sputtering, and may be located on a side of the first light emitting element 172 away from the driving backplane, and may be connected to a cathode circuit in the display panel. The material of the first cathode layer may be one or more of magnesium silver alloy, silver, indium tin oxide, indium zinc oxide, and graphene, but is not limited thereto, and other materials may be selected according to actual needs, and the disclosure does not limit this.

In one embodiment of the present disclosure, as shown in fig. 2, the second device 18 may include: a second anode layer 181, a second light emitting element 182, and a second cathode layer 191. The second anode layer 181 is a transparent anode layer, and may be connected to the second drain electrode 14 in the opaque region through a via, which is not limited in this disclosure. By providing the second anode layer 181 as a transparent anode layer, light emitted from the second light-emitting element 182 can be prevented from being blocked by the second anode layer 181, and thus light emitted from the second light-emitting element 182 can pass through the second anode layer 181.

Further, the projection of the second anode layer 181 on the driving back plate may be located in the transparent region, and the second anode layer 181 and the first anode layer 171 may be disposed on the same side. By disposing the second anode layer 181 in the transparent region, the light emitted from the second light emitting element 182 can pass through the second anode layer 181 and then smoothly pass through the driving backplane, so that the other side of the display panel can emit light, and thus the function of emitting light on both sides of the display panel is achieved.

In addition, the second anode layer 181 may be formed on the driving back plate by one or more of sputtering, e-beam evaporation, spin coating, baking, and photolithography. In addition, the material of the second anode layer 181 may be indium tin oxide, indium zinc oxide, a nano silver electrode, a conductive polymer material, a carbon nanotube, graphene, an electrospun nano copper wire, and a printed metal grid, but is not limited thereto, and other materials may also be used.

The second light emitting element 182 may be formed by one or more of evaporation, inkjet printing, and the like, and may be located on a side of the second anode layer 181 away from the driving backplane, and the second light emitting element 182 may be an organic electroluminescent element.

Further, the second cathode layer 191 may be a transparent cathode layer, which may be formed by one or more of thermal evaporation, electron beam evaporation, and sputtering, and may be located on a side of the second light emitting element 182 away from the driving backplane, and may be connected to a cathode circuit in the display panel. The material of the second cathode layer 191 may be one or more of magnesium silver alloy, silver, indium tin oxide, indium zinc oxide, and graphene, but is not limited thereto, and other materials may be selected according to actual needs, and the disclosure does not limit this.

Further, the first cathode layer and the second cathode layer 191 may be a continuous same cathode layer 19, which may be manufactured by one process, but is not limited thereto, and the first cathode layer and the second cathode layer 191 may also be two different cathode layers 19, which may be set according to actual needs.

In one embodiment of the present disclosure, as shown in fig. 2, the second light emitting element 182 may include: hole injection layer 1821, hole transport layer 1822, light emitting layer 1823, electron transport layer 1824, and electron injection layer 1825. The hole injection layer 1821 may be located on a side of the second anode layer 181 away from the driving backplane; hole transport layer 1822 may be located on the side of hole injection layer 1821 away from the driving backplane; light emitting layer 1823 may be located on the side of hole transport layer 1822 away from the driving backplane; the electron transport layer 1824 may cover a surface of the light emitting layer 1823; an electron injection layer 1825 may cover a surface of the electron transport layer 1824, and the second cathode layer 191 may be located on a side of the electron injection layer 1825 facing away from the driving backplane.

Further, the structure of the first light emitting element 172 may be the same as that of the second light emitting element 182. It is to be understood that the first light emitting element 172 may also have a hole injection layer 1821, a hole transport layer 1822, a light emitting layer 1823, an electron transport layer 1824, and an electron injection layer 1825. The hole injection layer 1821 in the first light emitting element 172 can be located on the side of the first anode layer 171 away from the driving backplane; hole transport layer 1822 may be located on the side of hole injection layer 1821 away from the driving backplane; light emitting layer 1823 may be located on the side of hole transport layer 1822 away from the driving backplane; the electron transport layer 1824 may cover a surface of the light emitting layer 1823; an electron injection layer 1825 may cover a surface of the electron transport layer 1824, and a first cathode layer may be located on a side of the electron injection layer 1825 facing away from the driving backplate.

Furthermore, the material of the first light emitting element 172 can be the same as the material of the second light emitting element 182, so that the manufacturing process and the manufacturing difficulty can be reduced.

In one embodiment of the present disclosure, the reflectivity of the second cathode layer 191 may be at least 1.05 times the reflectivity of the second anode layer 181. Therefore, according to the present disclosure, a part of the light emitted from the second light emitting element 182 is reflected by the second cathode layer 191 and emitted from the second anode layer 181, so that the intensity of the light emitted from the second anode layer 181 is increased, and the double-sided display effect of the display panel is better.

It should be noted that, by providing the second device 18, the present disclosure can ensure that the overall light transmittance of the display panel corresponding to the transparent area is greater than or equal to 10%.

When the second device 18 does not emit light, the area where the second device 18 is located is a transparent body, and the display panel can realize transparent display. When the second device 18 emits light, the second device 18 emits light to both sides at the same time, so that the display panel can implement double-sided simultaneous display. Therefore, the present disclosure enables the display panel to realize a function of transparent display or double-sided simultaneous display by providing the second device 18.

In another embodiment of the present disclosure, as shown in fig. 3, the second device 18 may include: a third anode layer 183, a transparency conversion layer 184 and a third cathode layer 192. The third anode layer 183 is a transparent anode layer, and may be connected to the second drain electrode 14 in the opaque region by a via, which is not limited in the present disclosure. By providing the third anode layer 183 as a transparent anode layer, the third anode layer 183 does not affect the transparent display when the second device 18 is in a transparent state.

Further, the projection of the third anode layer 183 on the driving back plate may be located in the transparent area, and the third anode layer 183 and the first anode layer 171 may be disposed on the same side. By disposing the third anode layer 183 in the transparent region, light can smoothly pass through the driving back plate, thereby realizing transparent display.

In addition, the third anode layer 183 may be formed on the driving back plate using one or more of sputtering, e-beam evaporation, spin coating, baking, and photolithography. In addition, the third anode layer 183 may be made of indium tin oxide, indium zinc oxide, a nano silver electrode, a conductive polymer material, a carbon nanotube, graphene, an electrospun nano copper wire, and a printed metal grid, but is not limited thereto, and other materials may also be used.

The transparency conversion layer 184 may be manufactured by one or more methods such as vapor deposition and inkjet printing. It may be located on the side of the third anode layer 183 away from the driving backplane, and the transparency conversion layer 184 is capable of switching the transparency between a transparent state and a light-shielding state.

When a voltage signal is applied to the transparency conversion layer 184, the transparency conversion layer 184 can be switched from a transparent state to an opaque state. Meanwhile, when the voltage signal applied to the transparency conversion layer 184 is removed, the transparency conversion layer 184 may be switched to a transparent state again. Therefore, the present disclosure can freely control the display state of the transparency conversion layer 184 during the display process by providing the transparency conversion layer, so that the display panel can be switched between transparent display and opaque display.

Further, the transparency conversion layer 184 may be made of an electrochromic material, and the material of the electrochromic material may be one or more of tungsten trioxide, molybdenum trioxide, titanium dioxide, viologen and a polymer of 3, 4-ethylenedioxythiophene monomer, but is not limited thereto, and may be set according to actual needs.

When the material of the transparency conversion layer 184 is tungsten trioxide, the transparent state thereof may be colorless, and the light-shielding state thereof may be blue; when the material of the transparency conversion layer 184 is molybdenum trioxide, the transparent state thereof may be colorless, and the light-shielding state thereof may be blue; when the material of the transparency conversion layer 184 is titanium dioxide, the transparent state thereof may be colorless, and the light-shielding state thereof may be blue; when the material of the transparency conversion layer 184 is viologen, the transparent state thereof may be colorless, and the light-shielding state thereof may be purple; when the material of the transparency conversion layer 184 is a polymer of 3, 4-ethylenedioxythiophene monomer, the transparent state thereof may be light gray, and the light-shielding state thereof may be blue.

The third cathode layer 192 may be a transparent cathode layer, which may be fabricated by one or more of thermal evaporation, electron beam evaporation, and sputtering, and may be located on a side of the transparency conversion layer 184 away from the driving backplane, and may be connected to a cathode circuit in the display panel. The material of the third cathode layer 192 may be one or more of magnesium silver alloy, silver, indium tin oxide, indium zinc oxide, and graphene, but is not limited thereto, and other materials may be selected according to actual needs, and the disclosure does not limit this.

Further, the first cathode layer and the third cathode layer 192 may be a continuous same cathode layer 19, which may be manufactured by one process, but is not limited thereto, and the first cathode layer and the third cathode layer 192 may also be two different cathode layers 19, which may be set according to actual needs.

It should be noted that, by providing the second device 18, the present disclosure can ensure that the overall light transmittance of the display panel corresponding to the transparent area is greater than or equal to 20%.

In one embodiment of the present disclosure, the light emitting device may further include a pixel defining layer, which may be disposed at one side of the driving backplane and disposed at the same side as the first and second devices 17 and 18. Also, the pixel defining layer may have a plurality of pixel defining parts 20, and one pixel defining part 20 may be disposed between each of the first and second devices 17 and 18 to separate the first and second devices 17 and 18.

Further, the height of the pixel defining part 20 in the first direction may be greater than the heights of the first and second devices 17 and 18 in the first direction, and the first direction may be perpendicular to the driving backplane and extend in a direction away from the driving backplane. By making the height of the pixel defining section 20 in the first direction larger than the height of the first device 17 and the second device 18 in the first direction, the effect of separating the first device 17 and the second device 18 can be made better.

In addition, a fourth cathode layer may be further disposed on a side of the pixel defining part 20 away from the driving backplane. The fourth cathode layer may be a transparent cathode layer, which may be fabricated by one or more of thermal evaporation, electron beam evaporation, and sputtering. The material of the third cathode layer 192 may be one or more of magnesium silver alloy, silver, indium tin oxide, indium zinc oxide, and graphene, but is not limited thereto, and other materials may be selected according to actual needs, and the disclosure does not limit this.

Next, the first cathode layer, the second cathode layer 191 and the fourth cathode layer may be a continuous same cathode layer 19, and the first cathode layer, the third cathode layer 192 and the fourth cathode layer may also be a continuous same cathode layer 19, which may all be manufactured by one process. The first, second, and fourth cathode layers may be three

different cathode layers

19, 192, and 20, and may be provided as needed.

In one embodiment of the present disclosure, as shown in fig. 1, an encapsulation layer 21 may be further disposed on a side of the light emitting device away from the driving backplane. The encapsulation layer 21 may be in the form of glass cover plate encapsulation, adhesive encapsulation, film encapsulation, or the like, and may be provided according to actual needs.

A second aspect of the present disclosure provides a display device, which may include the display panel described above. The display device can realize the functions of transparent display and bilateral simultaneous display, and also can realize the function of randomly switching between transparent display and opaque display in the display process.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A display panel, comprising:

driving the back plate;

2. The display panel of claim 1, wherein the driving backplane has transparent regions and opaque regions, the first device comprising:

3. The display panel according to claim 2, wherein the second device comprises:

4. The display panel according to claim 3, wherein the second light-emitting element comprises:

an electron transport layer covering the surface of the light emitting layer;

5. The display panel according to claim 4, wherein a structure of the first light-emitting element and a structure of the second light-emitting element are the same.

6. The display panel of claim 3, wherein the second cathode layer has a reflectivity that is at least 1.05 times the reflectivity of the second anode layer.

7. The display panel according to claim 2, wherein the second device comprises:

8. The display panel according to claim 7, wherein a material of the transparency conversion layer is one or more of tungsten trioxide, molybdenum trioxide, titanium dioxide, viologen, and a polymer of a 3, 4-ethylenedioxythiophene monomer.

9. The display panel according to claim 1, wherein the light-emitting device further comprises:

10. A display device comprising the display panel according to any one of claims 1 to 9.