Double-sided display panel and display device

Abstract

The application relates to a double-sided display panel and a display device. The double-sided display panel comprises a first light-out surface and a second light-out surface opposite to each other. The double-sided display panel further comprises a substrate, an array layer and light-emitting elements. The array layer is located on one side of the substrate, and the array layer comprises a plurality of pixel driving units. The light-emitting elements are electrically connected with the pixel driving units, and the light-emitting elements comprise first light-emitting elements and second light-emitting elements. The first light-emitting elements are located on the side of the array layer away from the substrate, and the projection of the second light-emitting elements in a first direction is arranged to overlap the projection of the array layer in the first direction. The first direction intersects the thickness direction of the double-sided display panel. The application can improve the thinness of the display panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a double-sided display panel and a display device. BACKGROUND

[0002] With the development of display technology, the application range of display panel is also more and more wide, and the double-sided display as a novel display mode is also applied in many fields, such as billboards, vehicle windows and the like.

[0003] At present, the double-sided display is usually formed by splicing two displays, and the thickness of the overall device is thick after the two displays are spliced, which causes the cost of the double-sided display to be high and the thinness degree of the double-sided display to be low.

[0004] Therefore, there is an urgent need for a new display device. SUMMARY

[0005] The double-sided display panel and the display device provided by the embodiments of the present application can improve the thinness degree of the display panel.

[0006] In one aspect, the present application provides a double-sided display panel, comprising a first light-out surface and a second light-out surface opposite to each other, and the double-sided display panel further comprises a substrate, an array layer located on one side of the substrate, the array layer comprising a plurality of pixel driving units, a light-emitting element electrically connected with the pixel driving unit, the light-emitting element comprising a first light-emitting element and a second light-emitting element, wherein the first light-emitting element is located on the side of the array layer away from the substrate, and the projection of the second light-emitting element in a first direction is arranged to overlap with the projection of the array layer in the first direction, and the first direction intersects with the thickness direction of the double-sided display panel.

[0007] In another aspect, the present application further provides a display device comprising the double-sided display panel as described above.

[0008] In the double-sided display panel and the display device provided by the present application, the double-sided display panel comprises a first light-out surface and a second light-out surface opposite to each other. The double-sided display panel further comprises a substrate, an array layer and a light-emitting element. The light-emitting element comprises a first light-emitting element and a second light-emitting element, the first light-emitting element is located on the side of the array layer away from the substrate, and the projection of the second light-emitting element in a first direction is arranged to overlap with the projection of the array layer in the first direction, which reduces the arrangement space of the light-emitting element in the thickness direction of the display panel, thereby reducing the thickness of the display panel and improving the thinness degree of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0009] The features, advantages and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0010] Figure 1A cross-sectional structure schematic diagram of a display panel provided for some embodiments of the present application;

[0011] Figure 2 A top view structure schematic diagram of a display panel provided for some embodiments of the present application;

[0012] Figure 3 A cross-sectional structure schematic diagram of a display panel provided for some embodiments of the present application;

[0013] Figure 4 A cross-sectional structure schematic diagram of a display panel provided for some embodiments of the present application;

[0014] Figure 5 A cross-sectional structure schematic diagram of a display panel provided for some embodiments of the present application;

[0015] Figure 6 A cross-sectional structure schematic diagram of a display panel provided for some embodiments of the present application.

[0016] Marking description:

[0017] K1, first light-out surface; K11, first pixel area; K2, second light-out surface; K21, second pixel area; S1, light-transmitting area; Q1, first area; Q2, second area;

[0018] 10, substrate;

[0019] 20, array layer; 21, pixel driving unit; 22, gate metal layer; 23, source-drain metal layer; 24, active layer; 25, protective layer;

[0020] 30, light-emitting element; 31, first light-emitting element; 32, second light-emitting element;

[0021] 40, first light-shielding part;

[0022] 50, second light-shielding part;

[0023] 60, hollow part;

[0024] 70, electrode layer; 71, first electrode layer; 72, second electrode layer; 721, first conductive connection part; 722, second conductive connection part; 723, functional unit; 73, first conductive layer; 74, second conductive layer;

[0025] 80, reflecting part; 81, first sub-reflecting part;

[0026] X, first direction.

[0027] In the drawings, the same parts are designated by the same reference numerals. The drawings are not drawn according to the actual proportions. DETAILED DESCRIPTION

[0028] The features and exemplary embodiments of the various aspects of the present application will be described in detail below with reference to the drawings. For the purpose of clarity, technical terms may be defined herein before being consistently used throughout the specification. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. It will be apparent to those skilled in the art that various modifications and variations can be made to the specific embodiments without departing from the spirit or scope of the application. There is no intention to limit the application to the specific embodiments disclosed, but rather, the specific disclosure is intended to convey the principles of the present application, and thus, the application is to be afforded the full scope of the disclosure below.

[0029] It should be noted that the terms such as first and second, etc., are merely intended to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Moreover, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, so that a process, method, article, or apparatus that includes a list of elements does not include only those elements recited, but also other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by an "includes" statement does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0030] At present, a double-sided display is usually formed by splicing two display panels, and the spliced double-sided display panel can display pictures on both sides. Generally, in order to improve the thinness of the double-sided display, the front display panel and the back display panel share part of the structure. Taking an organic light emitting diode (OLED) display panel as an example, a common thin film transistor is usually used, and light emitting layers are arranged on both sides of the thin film transistor to realize double-sided display.

[0031] However, the method of arranging light emitting layers on both sides of the thin film transistor is complicated, and the entire screen body can only realize display function and cannot realize light transmission function, so the application field is less.

[0032] In order to better understand the present application, on the one hand, the following will be described in combination with Figures 1 to 6 The double-sided display panel and the display device according to the embodiments of the present application are described in detail.

[0033] Figure 1 A cross-sectional structure schematic diagram of a display panel provided for some embodiments of the present application. Figure 2 A top view structure schematic diagram of a display panel provided for some embodiments of the present application.

[0034] As Figure 1 and Figure 2 shown, the embodiment of the present application provides a double-sided display panel, the double-sided display panel includes a first light-emitting surface K1 and a second light-emitting surface K2 opposite to each other. The double-sided display panel further includes a substrate 10, an array layer 20 and a light-emitting element 30. The array layer 20 is located on one side of the substrate 10, and the array layer 20 includes a plurality of pixel driving units 21. The light-emitting element 30 is electrically connected with the pixel driving unit 21, and the light-emitting element 30 includes a first light-emitting element 31 and a second light-emitting element 32, wherein the first light-emitting element 31 is located on the side of the array layer 20 away from the substrate 10, and the projection of the second light-emitting element 32 in the first direction X is arranged to overlap the projection of the array layer 20 in the first direction X, and the first direction X intersects the thickness direction of the double-sided display panel.

[0035] In the embodiment of the present application, the double-sided display panel includes a first light-emitting surface K1 and a second light-emitting surface K2 opposite to each other, the first light-emitting element 31 emits light rays through the first light-emitting surface K1, and the light rays emitted by the plurality of first light-emitting elements 31 form an image displayed through the first light-emitting surface K1. The second light-emitting element 32 emits light rays through the second light-emitting surface K2, and the light rays emitted by the plurality of second light-emitting elements 32 form an image displayed through the second light-emitting surface K2.

[0036] Optionally, the material of the substrate 10 can include a high-transparency material, which is beneficial to improve the clarity of the image formed through the second light-emitting surface K2.

[0037] Optionally, the array layer 20 can include a gate metal layer 22, a source / drain metal layer 23, an active layer 24, and can further include an insulating layer between each conductive film layer. Optionally, the above-mentioned conductive film layer and the insulating layer form the pixel driving unit 21. In some examples, a planarization layer is further arranged between the array layer 20 and the light-emitting element 30, so as to adjust the light-emitting direction of the light-emitting element 30. It should be noted that the Figure 1 is only an exemplary drawing of the film layer structure of the double-sided display panel highlighting the key points of the embodiment of the present application, and the film layer structure of the double-sided display panel is not limited to this, and further includes, for example, an encapsulation structure layer, various insulating layers, a passivation layer, a buffer layer between the substrate 10 and the array layer 20, etc. Film layer structure, for details, please refer to the structure of Micro-LED display panel in related technology, which will not be repeated here.

[0038] Optionally, the first light emitting element 31 and the second light emitting element 32 can each include a micro-LED, i.e., Micro-LED, the structure and light emitting principle of which can refer to the light emitting technology of Micro-LED in the related art, and the present embodiment will not be described here. The present embodiment does not specially limit the size of the first light emitting element 31 and the second light emitting element 32, which can be adjusted according to design requirements. Optionally, the light emitting direction of the first light emitting element 31 and the second light emitting element 32 can each include a direction towards the substrate 10 and a direction away from the substrate 10.

[0039] In the present embodiment, the double-sided display panel can include a plurality of arrayed light emitting elements 30, each of which forms an independent sub-pixel, and each of which includes a first light emitting element 31 and a second light emitting element 32. The first light emitting element 31 is located on the side of the array layer 20 away from the substrate 10, and the distance between the first light emitting element 31 and the first light emitting surface K1 is reduced. Optionally, the first direction X is perpendicular to the thickness direction of the double-sided display panel, and the projection of the second light emitting element 32 on the first direction X is arranged to overlap the projection of the array layer 20 on the first direction X, so that at least part of the second light emitting element 32 is arranged in the same layer as the array layer 20. For example, the second light emitting element 32 can be arranged in the same layer as the pixel driving unit 21. Of course, in order to flatten the first light emitting surface K1 and reduce the possibility of the second light emitting element 32 being offset or touched, part of the film layer in the array layer 20 is arranged to cover the second light emitting element 32. For example, the second light emitting element 32 can be covered with a planarization layer. Optionally, the material of the planarization layer includes a material with high transparency.

[0040] According to the double-sided display panel provided in the present application, the double-sided display panel includes a first light emitting surface K1 and a second light emitting surface K2 opposite to each other. The double-sided display panel further includes a substrate 10, an array layer 20, and a light emitting element 30. The light emitting element 30 includes a first light emitting element 31 and a second light emitting element 32. The first light emitting element 31 is located on the side of the array layer 20 away from the substrate 10. The projection of the second light emitting element 32 on the first direction X is arranged to overlap the projection of the array layer 20 on the first direction X. The arrangement space of the light emitting element 30 in the thickness direction of the display panel is reduced, thereby reducing the thickness of the display panel and improving the thinness of the display panel.

[0041] As shown in FIG. 1, Figure 2 In some optional embodiments, the first light emitting surface K1 has a first pixel area K11, and the first light emitting element 31 is located in the first pixel area K11. The second light emitting surface K2 has a second pixel area K21, and the second light emitting element 32 is located in the second pixel area K21.

[0042] The embodiments of the present application arrange the pixel regions on the light-out surfaces, and each first light-emitting element 31 and each second light-emitting element 32 form an independent sub-pixel in the respective pixel region. For the convenience of understanding, Figure 2 part of the film layers are omitted.

[0043] Optionally, the first light-out surface K1 and the second light-out surface K2 further include a non-display region, the first pixel region K11 and the second pixel region K21 form a display region, and the non-display region is arranged around the display region.

[0044] As shown in Figure 1 in some optional embodiments, the first light-emitting element 31 and the second light-emitting element 32 are electrically connected with the same pixel driving unit 21.

[0045] The embodiments of the present application reduce the number of arrangements of the pixel driving unit 21 and the arrangement space of the pixel driving unit 21, which is beneficial to improve the PPI value (Pixels Per Inch, pixel density, which refers to the number of pixels per inch. The higher the PPI value, the higher the density of the display screen to display images, and the more details of the picture).

[0046] Optionally, the first light-emitting element 31 and the second light-emitting element 32 can also be electrically connected with different pixel driving units 21. It can be understood that when the first light-emitting element 31 and the second light-emitting element 32 are electrically connected with the same pixel driving unit 21, the pixel driving unit 21 needs to control the first light-emitting element 31 and the second light-emitting element 32 in a time-sharing manner. When the first light-emitting element 31 and the second light-emitting element 32 are electrically connected with different pixel driving units 21, each pixel driving unit 21 independently controls a light-emitting element 30.

[0047] As shown in Figure 1 in some optional embodiments, a first light-shielding portion 40 is further included, the first light-shielding portion 40 is located between the first light-emitting element 31 and the array layer 20, and the first light-shielding portion 40 is located on the side of the second light-emitting element 32 away from the substrate 10.

[0048] The embodiments of the present application reduce the possibility that the light emitted by the light-emitting element 30 irradiates the pixel driving unit 21, reduce the possibility that the pixel driving unit 21 is damaged after being irradiated by light, reduce the possibility that the display effect of the first light-out surface K1 is affected by the light emitted by the second light-emitting element 32, and improve the reliability of the double-sided display panel.

[0049] Alternatively, the first light shielding portion 40 may be made of a black light-absorbing material, or a combination of a black pigment or dye colorant and other materials. In some embodiments, the first light shielding portion 40 may be made of, for example, titanium black, lignin black, composite oxide pigments such as iron or manganese, and combinations thereof.

[0050] Optionally, the first light shielding portion 40 may be located on the side of the planarization layer facing away from the substrate 10, wherein the planarization layer is located on the side of the array layer 20 facing away from the substrate 10. Optionally, the first light shielding portion 40 may be laid as a whole layer between the first light emitting element 31 and the second light emitting element 32.

[0051] like Figure 1 As shown, in some optional embodiments, a second light shielding portion 50 is further included, and the orthographic projection of the second light shielding portion 50 on the substrate 10 is located between the orthographic projection of the first light-emitting element 31 on the substrate 10 and the orthographic projection of the second light-emitting element 32 on the substrate 10. And / or the double-sided display panel further includes a light-transmitting area S1, which is arranged at least side by side with the array layer 20, and the second light shielding portion 50 is located between the light-transmitting area S1 and the second light-emitting element 32.

[0052] In the embodiment of the present application, the second light shielding portion 50 is provided to reduce the possibility of the second light emitting element 32 irradiating the pixel driving unit 21 and damaging the pixel driving unit 21 , and to reduce the possibility of the light emitted by the second light emitting element 32 being emitted from the light transmitting area S1 and affecting the light transmission effect.

[0053] Optionally, the material of the second light shielding portion 50 may be the same as that of the first light shielding portion 40 .

[0054] Optionally, the second light shielding portion 50 is located between the second light emitting element 32 and the pixel driving unit 21 .

[0055] Optionally, the light-transmitting region S1 may be located around the array layer 20 , and the area of ​​the light-transmitting region S1 may be greater than or equal to the area of ​​the array layer 20 . Of course, the area of ​​the light-transmitting region S1 may also be smaller than the area of ​​the array layer 20 .

[0056] Figure 3 A schematic cross-sectional structure diagram of another display panel provided in some embodiments of the present application.

[0057] like Figure 1 and Figure 3 As shown, in some optional embodiments, the array layer 20 further includes a hollow portion 60, which is located between the second light-emitting element 32 and the pixel driving unit 21. And / or at least part of the hollow portion 60 forms a light-transmitting area S1. The second light-shielding portion 50 at least covers the sidewalls of the hollow portion 60.

[0058] The embodiment of the present application reduces the possibility of the pixel driving unit 21 being damaged by the second light emitting element 32 through the above arrangement, and reduces the area occupied by the second light shielding portion 50, and further reduces the size of the sub-pixel formed by the first light emitting element 31 and the second light emitting element 32.

[0059] Optionally, the hollow portion 60 can be located between the second light emitting element 32 and the pixel driving unit 21, and the hollow portion 60 can penetrate part of the film layer. For example, the hollow portion 60 can penetrate at least part of the conductive film layer and the insulating layer in the pixel driving unit 21.

[0060] Optionally, the hollow portion 60 includes a side wall and a bottom wall, and the side wall and the bottom wall form an accommodation space, as shown in Figure 3 As shown, the second light shielding portion 50 can cover the side wall. Of course, the second light shielding portion 50 can also cover the bottom wall. Optionally, as shown in Figure 1 When the hollow portion 60 is located between the second light emitting element 32 and the pixel driving unit 21, the second light shielding portion 50 can be filled in the hollow portion 60. Optionally, the hollow portion 60 and the array layer 20 can be filled flat by a planarization layer.

[0061] Optionally, the hollow portion 60 can be located on the side of the second light emitting element 32 away from the pixel driving unit 21, and the hollow portion 60 can form a light transmission area S1. Of course, the light transmission area S1 formed by the hollow portion 60 can also be located in other peripheral regions of the array layer 20.

[0062] As shown in Figure 1 and Figure 3 In some optional embodiments, the projection of the second light emitting element 32 in the first direction X and the projection of the second light shielding portion 50 in the first direction X are at least partially overlapped.

[0063] The embodiment of the present application improves the light shielding effect of the second light shielding portion 50 on the second light emitting element 32 in the first direction X, and reduces the possibility of light leakage of the second light emitting element 32 in the first direction X.

[0064] Optionally, the projection of the second light emitting element 32 in the first direction X and the projection of the second light shielding portion 50 in the first direction X can be fully overlapped. Of course, the projection of the second light emitting element 32 in the first direction X and the projection of the second light shielding portion 50 in the first direction X can be partially overlapped, which is not limited in the embodiment of the present application, as long as the light emitted by the second light emitting element 32 in the first direction X can be blocked.

[0065] Optionally, the side of the second light emitting element 32 facing away from the substrate 10 is shielded by the first light shielding portion 40, and the two sides of the second light emitting element 32 along the first direction X are shielded by the second light shielding portion 50, so that the light emitted by the second light emitting element 32 is emitted from the second light exit surface K2.

[0066] As shown in Figure 1 and Figure 3 In some optional embodiments, the first light shielding portion 40 and the second light shielding portion 50 are in an integrated structure, which improves the shielding effect of the light shielding portion on the first light emitting element 31 and the second light emitting element 32, simplifies the manufacturing process of the first light shielding portion 40 and the second light shielding portion 50, and reduces the manufacturing cost of the display panel.

[0067] As shown in Figure 1 and Figure 3 In some optional embodiments, the double-sided display panel further includes an electrode layer 70, the electrode layer 70 includes a first electrode layer 71 and a second electrode layer 72, the first electrode layer 71 is located on the side of the array layer 20 away from the substrate 10, and the second electrode layer 72 is located on the side of the second light emitting unit facing the substrate 10. Wherein, the first light emitting unit is electrically connected to the pixel driving unit 21 through the first electrode layer 71, and the second light emitting unit is electrically connected to the pixel driving unit 21 through the second electrode layer 72.

[0068] Optionally, the first electrode layer 71 can be located between the first light shielding portion 40 and the first light emitting element 31, and the first electrode layer 71 can be electrically connected to the pixel driving unit 21 through a via. Optionally, the first light emitting element 31 and the second light emitting element 32 each include an anode and a cathode, the anode of the first light emitting element 31 is electrically connected to the pixel driving unit 21 through the first electrode layer 71, and the anode of the second light emitting element 32 is electrically connected to the pixel driving unit 21 through the second electrode layer 72.

[0069] As shown in Figure 1 and Figure 3 In some optional embodiments, the second electrode layer 72 includes a first conductive connection portion 721, the array layer 20 includes a first region Q1 and a second region Q2, the first region Q1 is arranged apart from the second region Q2 through the hollow portion 60, the first region Q1 is provided with the pixel driving unit 21, and the orthographic projection of the first light emitting element 31 on the substrate 10 is located within the orthographic projection of the first region Q1 on the substrate 10, and the second region Q2 is provided with the second light emitting element 32. Wherein, the first conductive connection portion 721 is located between the first region Q1 and the second region Q2, and the second light emitting element 32 is electrically connected to the pixel driving unit 21 through the first conductive connection portion 721.

[0070] The embodiment of the present application reduces the possibility of the light leakage of the second light emitting element 32 irradiating to the pixel driving unit 21 under the premise of ensuring the normal use of the second light emitting element 32 by passing through the hollow part 60 via the first conductive connection part 721.

[0071] In the embodiment of the present application, the first area Q1, the hollow part 60 and the second area Q2 are distributed in sequence, and the first area Q1 and the second area Q2 are shaded by the second shading part 50 in the hollow part 60. The first light emitting element 31 is arranged on the side of the first area Q1 away from the substrate 10, thereby reducing the distance between the first light emitting element 31 and the pixel driving unit 21.

[0072] As shown in Figure 1 and Figure 3 In some optional embodiments, the second electrode layer 72 further includes a second conductive connection part 722, the second conductive connection part 722 is arranged spaced apart from the first conductive connection part 721, the second light emitting element 32 is electrically connected with the second conductive connection part 722, and at least part of the orthographic projection of the light emitting surface of the second light emitting element 32 on the substrate 10 is located between the orthographic projection of the first conductive connection part 721 on the substrate 10 and the orthographic projection of the second conductive connection part 722 on the substrate 10.

[0073] The embodiment of the present application reduces the shielding of the conductive connection part to the second light emitting element 32, and increases the light exit area of the second light emitting element 32.

[0074] Optionally, the second conductive connection part 722 can be electrically connected with the cathode of the second light emitting element 32. Optionally, the second conductive connection part 722 is arranged in the same layer as the first conductive connection part 721. Optionally, the material of the second conductive connection part 722 can be the same as or different from the material of the first conductive connection part 721.

[0075] In the embodiment of the present application, the first conductive connection part 721 and the second conductive connection part 722 are arranged spaced apart from each other, and the area between the two can be the area of the light emitted by the second light emitting element 32. Of course, the light emitting surface area of the second light emitting element 32 can be much larger than the area between the first conductive connection part 721 and the second conductive connection part 722, and the second light emitting element 32 can emit light from the side away from the first conductive connection part 721.

[0076] Figure 4 Another cross-sectional structure schematic diagram of a display panel is provided for some embodiments of the present application.

[0077] As shown in Figure 4As shown, in some optional embodiments, the second electrode layer 72 includes a first conductive layer 73 and a second conductive layer 74, the materials of the first conductive layer 73 and the second conductive layer 74 are different, and the transmittance of the second conductive layer 74 is greater than the transmittance of the first conductive layer 73, and the first conductive layer 73 is a light-shielding material.

[0078] Through the above configuration, the embodiment of the present application can select the material of the second electrode layer 72 according to design requirements, making the arrangement of the second light-emitting element 32 more flexible.

[0079] Alternatively, the first conductive layer 73 may include a metal material. The second conductive layer 74 may include indium tin oxide (ITO).

[0080] like Figure 4 As shown, in some optional embodiments, the first conductive connection portion 721 includes a first conductive layer 73 and a second conductive layer 74, the second conductive layer 74 is located at least on the side of the first conductive layer 73 facing away from the substrate 10, and the orthographic projection of the second light-shielding portion 50 on the substrate 10 is located within the orthographic projection of the first conductive layer 73 on the substrate 10, and the orthographic projection of the second conductive layer 74 on the substrate 10 is overlapped with the orthographic projection of the second light-emitting element 32 on the substrate 10.

[0081] Through the above configuration, the embodiment of the present application further reduces the possibility that the light emitted by the second light-emitting element 32 will irradiate the pixel driving unit 21 , thereby increasing the light emitting area of ​​the second light-emitting element 32 .

[0082] Optionally, the first conductive layer 73 and the second conductive layer 74 included in the first conductive connection portion 721 may be stacked, and optionally, part of the second conductive layer 74 covers the first conductive layer 73, thereby reducing the shielding area of ​​the first conductive portion on the side of the second light-emitting unit.

[0083] In the embodiment of the present application, the orthographic projection of the second light-shielding portion 50 on the substrate 10 is located within the orthographic projection of the first conductive layer 73 on the substrate 10, so that the second light-shielding portion 50 and the first conductive layer 73 jointly block the second light-emitting element 32. The orthographic projection of the second conductive layer 74 on the substrate 10 overlaps with the orthographic projection of the second light-emitting element 32 on the substrate 10, so that light emitted by the second light-emitting element 32 can be emitted from the second light-emitting surface K2 through the second conductive layer 74.

[0084] like Figure 4 As shown, in some optional embodiments, the second conductive connection portion 722 includes at least a second conductive layer 74 , thereby increasing the light emitting area of ​​the second light emitting element 32 .

[0085] Optionally, the second conductive connection 722 can be formed by the second conductive layer 74. Optionally, the second conductive layer 74 can be formed by the first conductive layer 73 and the second conductive layer 74.

[0086] As shown in FIG. 1, in some optional embodiments, the array layer 20 further includes a plurality of protective layers 25, each of the protective layers 25 is located between each of the first conductive connections 721 and the hollowed part 60, the orthographic projection of the hollowed part 60 on the substrate 10 is located within the orthographic projection of the protective layer 25 on the substrate 10, and the orthographic projection of the protective layer 25 on the substrate 10 is located within the orthographic projection of the first conductive connection 721 on the substrate 10. Figure 4

[0087] The embodiments of the present application reduce the possibility of damage to the first conductive connection 721 caused by the process of manufacturing part of the film layers in the pixel driving unit 21, and improve the reliability of the first conductive connection 721.

[0088] Optionally, the protective layer 25 between the first conductive connection 721 and the hollowed part 60 can be formed in the same layer as one or more of the insulating layer, the passivation layer, the planarization layer, and the buffer layer between the substrate 10 and the array layer 20. In other words, the protective layer 25 can be manufactured by the same process as one or more of the above-mentioned film layers.

[0089] Optionally, the protective layer 25 can cover the part of the first conductive connection 721 located in the first area Q1 and the part of the first conductive connection 721 located in the hollowed part 60. In some examples, the protective layer 25 can also cover the part of the first conductive connection 721 located in the second area Q2.

[0090] As shown in FIG. 1, in some optional embodiments, the substrate 10 and the first electrode layer 71 include a plurality of functional layers, and the second electrode layer 72 is formed in the same layer as at least one of the plurality of functional layers. Figure 4 The embodiments of the present application can simplify the manufacturing process of the second electrode layer 72 and reduce the manufacturing cost of the display panel by manufacturing the second electrode layer 72 together with the functional layer.

[0091] Optionally, the functional layer can include a conductive film layer. For example, the functional layer includes a first metal layer, a second metal layer, a third metal layer, and a fourth metal layer. For example, the functional layer includes a gate metal layer 22, a source / drain metal layer 23, an active layer 24, and a capacitor layer.

[0092]

[0093] ​​Optionally, the second electrode layer 72 can be arranged in the same layer as one or more layers of the multi-layer functional layer. For example, the first conductive connection part 721 and the second conductive connection part 722 in the second electrode layer 72 are arranged in the same layer and in the same layer as one layer of the functional layer. Alternatively, the first conductive connection part 721 and the second conductive connection part 722 in the second electrode layer 72 are arranged in different layers, and the first conductive connection part 721 and the second conductive connection part 722 are arranged in the functional layer respectively corresponding to at least two layers.

[0094] Optionally, the first conductive connection part 721 and the second conductive connection part 722 in the second electrode layer 72 are arranged in the second light-emitting element 32 one by one, and the second electrode layer 72 connected by different second light-emitting elements 32 can be different layers.

[0095] As shown in the Figure 4 some optional embodiments, the second electrode layer 72 is arranged on the side surface of the substrate 10 facing the array layer 20, and the second electrode layer 72 further includes a functional unit 723 arranged corresponding to the pixel driving unit 21.

[0096] The embodiment of the present application makes the second electrode layer 72 multiplexed as part of the film layer in the pixel driving unit 21, thereby reducing the process steps of the second electrode layer 72 and reducing the manufacturing cost of the display panel. Moreover, the second electrode layer 72 is arranged on the side surface of the substrate 10 facing the array layer 20, so that the functional unit 723 can shield at least part of the pixel driving unit 21, reducing the possibility of external light being irradiated to the active layer 24 in the pixel driving unit 21 from the second light-emitting surface K2.

[0097] Optionally, the functional unit 723 in the second electrode layer 72 is arranged in the array layer 20, thereby multiplexed as part of the film layer in the pixel driving unit 21.

[0098] Optionally, the material of the functional unit 723 can be the same as the material of the first conductive connection part 721, of course, it can also be different. Optionally, the material of the functional unit 723 includes light shielding material.

[0099] As shown in the Figure 4 some optional embodiments, the functional unit 723 is a bottom gate structure of the pixel driving unit 21 or a light shielding unit shielding the active layer 24. The orthographic projection of the active layer 24 on the substrate 10 is located in the orthographic projection of the functional unit 723 on the substrate 10.

[0100] The embodiment of the present application reduces the possibility of the active layer 24 being irradiated by light from the second light-emitting surface under the premise that the functional unit 723 is multiplexed as part of the film layer in the pixel driving unit 21, thereby improving the reliability of the pixel driving unit 21.

[0101] In some examples, the pixel driving unit 21 includes a top-gate thin film transistor, i.e., the gate electrode is located between the active layer 24 and the source / drain electrodes. The pixel driving unit 21 may also include a bottom-gate thin film transistor, i.e., the active layer 24 is located between the gate electrode and the source / drain electrodes. The pixel driving unit 21 may also include a dual-gate thin film transistor, i.e., the number of gate electrodes includes two, one of which is located between the active layer 24 and the source / drain electrodes, and the other is located on the side of the active layer 24 facing away from the source / drain electrodes.

[0102] In the embodiment of the present application, the functional unit 723 may be a bottom-gate electrode of the pixel driving unit 21. Alternatively, when the pixel driving unit 21 is a top-gate thin-film transistor, the functional unit 723 is located between the active layer 24 and the substrate 10 and may be a light shielding unit that shields the active layer 24. Optionally, the orthographic projection area of ​​the functional unit 723 on the substrate 10 may be greater than or equal to the orthographic projection area of ​​the active layer 24 on the substrate 10.

[0103] Figure 5 A schematic cross-sectional structure diagram of another display panel provided in some embodiments of the present application.

[0104] like Figure 5 As shown, in some optional embodiments, the second electrode layer 72 is arranged in the same layer as one of the multi-layer functional layers in the array layer 20, and the first conductive connection portion 721 in the second electrode layer 72 is provided with a second shading portion 50 on both the side facing the substrate 10 and the side facing away from the substrate 10.

[0105] Through the above configuration, the embodiment of the present application allows the second light emitting element 32 to adjust the distance between the second light emitting element 32 and the substrate 10 according to design requirements, and can flexibly adjust the intensity and angle of the light.

[0106] Optionally, the second electrode layer 72 is provided with a hollow portion 60 on the side facing the substrate 10 and the side facing away from the substrate 10, and a second light shielding portion 50 can be arranged in each hollow portion 60. Optionally, taking the second light shielding portion 50 on the side of the second electrode layer 72 facing the substrate 10 as a first part and the second light shielding portion 50 on the side of the second electrode layer 72 facing away from the substrate 10 as a second part as an example, the material of the first part can be the same as that of the second part, and of course, the material of the first part can also be different from that of the second part. Optionally, the orthographic projection of the first part on the substrate 10 and the orthographic projection of the second part on the substrate 10 are at least partially overlapped. For example, the orthographic projection of the first part on the substrate 10 is located within the orthographic projection of the second part on the substrate 10. Alternatively, the orthographic projection of the second part on the substrate 10 is located within the orthographic projection of the first part on the substrate 10. Alternatively, the orthographic projection of the first part on the substrate 10 and the orthographic projection of the second part on the substrate 10 are overlapped. It can be understood that in the process of manufacturing the second light shielding portion 50 and the second electrode layer 72, the first part in the second light shielding portion 50 can be manufactured first, then the first conductive connection portion 721 is manufactured, and then the second part in the second light shielding portion 50 is manufactured.

[0107] Optionally, in other optional embodiments of the present application, the second light shielding portion 50 located on the first part of the first conductive connection portion 721 facing the substrate can be removed, and the side of the first conductive connection portion 721 facing the substrate 10 can include an insulating layer in the array layer 20. That is, the insulating layer in the array layer on the side of the first conductive connection portion 721 facing the substrate is at least continuous, and a groove or a hollow is formed on the side of the first conductive connection portion 721 facing away from the substrate.

[0108] Figure 6 Another cross-sectional structure schematic diagram of a display panel is provided for some embodiments of the present application.

[0109] As shown in some optional embodiments, Figure 6 the double-sided display panel further includes a reflecting portion 80, the projection of the reflecting portion 80 along the first direction X is at least partially overlapped with the projection of the first light emitting element 31 along the first direction X, and / or the projection of the reflecting portion 80 along the first direction X is at least partially overlapped with the projection of the second light emitting element 32 along the first direction X.

[0110] Through the above arrangement, the embodiments of the present application can flexibly adjust the direction of the light emitted by the light emitting element 30, so that the light emitted by the light emitting element 30 is more concentrated, and the light emitting efficiency of the light emitting element 30 is improved.

[0111] Optionally, the reflective portion 80 may be located on a side of the first light-shielding portion 40 facing away from the substrate 10. Optionally, a first insulating layer may be provided between the reflective portion 80, the first light-emitting element 31, and the first electrode layer 71, and the first light-shielding portion 40. Optionally, the reflective layer may extend from the side of the first insulating layer facing away from the substrate 10 along the thickness direction of the double-sided display panel.

[0112] Optionally, the dimension of the reflective layer in the thickness direction may exceed the dimension of the first light emitting element 31 in the thickness direction. Optionally, the reflective layer may be located on the peripheral side of the first light emitting element 31 .

[0113] Optionally, the materials of the reflective layer disposed around the first light-emitting element 31 and the reflective layer disposed around the second light-emitting element 32 may be the same or different.

[0114] Optionally, the projection of the reflective layer along the first direction X may overlap with the projection of the second light emitting element 32 along the first direction X. Alternatively, the projection of the reflective layer along the first direction X may partially overlap with the projection of the second light emitting element 32 along the first direction X.

[0115] like Figure 6 As shown, in some optional embodiments, the reflecting portion 80 includes a first sub-reflecting portion 81, the first sub-reflecting portion 81 is located at least on the side of the second light-emitting element 32 facing away from the substrate 10, and the orthographic projection of the second light-emitting element 32 on the substrate 10 is located within the orthographic projection of the first sub-reflecting portion 81 on the substrate 10.

[0116] In the embodiment of the present application, the first sub-reflection portion 81 is arranged on the side of the second light-emitting element 32 facing away from the substrate 10 and on the peripheral side of the second light-emitting element 32 along the first direction X, so that the light emitted by the second light-emitting element 32 toward other directions can be reflected and emitted from the second light-emitting surface K2, thereby improving the luminous efficiency of the second light-emitting element 32.

[0117] Optionally, both sides of the second light emitting element 32 along the first direction X are provided with first sub-reflective portions 81 .

[0118] Optionally, a second insulating layer may be provided between the second light emitting element 32 and the first sub-reflecting portion 81. The second insulating layer may be made of a material having high transparency. Optionally, the second insulating layer may be manufactured together with the insulating layer in the array layer 20.

[0119] like Figure 6 As shown, in some optional embodiments, the first sub-reflection portion 81 is provided in the same layer as the functional layer in the pixel driving unit 21 .

[0120] Through the above configuration, the embodiment of the present application simplifies the process steps of the first sub-reflection portion 81 and reduces the manufacturing cost of the display panel.

[0121] Optionally, the first sub-reflection part 81 can also be arranged in the same layer as the functional layer in the pixel driving unit 21, and of course, can also be arranged in different layers. In the embodiments of the present application, the first sub-reflection part 81 is arranged in the same layer as the functional layer in the pixel driving unit 21 for the purpose of reducing the process steps of the display panel and reducing the cost. Optionally, the material of the first sub-reflection part 81 includes a metal material. Optionally, the first sub-reflection part 81 can be made by physical vapor deposition.

[0122] On the other hand, the embodiments of the present application also provide a display device including any one of the double-sided display panels as described above.

[0123] Since the display device provided by the embodiments of the present application includes the double-sided display panel of any one of the embodiments described above, the display device provided by the embodiments of the present application has the beneficial effects of the double-sided display panel of any one of the embodiments described above, which will not be described here again.

[0124] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A double-sided display panel, characterized in that: The double-sided display panel comprises a first light-emitting surface and a second light-emitting surface opposite to each other, and further comprises: substrate; an array layer, located on one side of the substrate, the array layer comprising a plurality of pixel driving units; a light-emitting element electrically connected to the pixel driving unit, the light-emitting element including a first light-emitting element and a second light-emitting element, wherein the first light-emitting element is located on a side of the array layer facing away from the substrate, and a projection of the second light-emitting element in a first direction overlaps with a projection of the array layer in the first direction, and the first direction intersects with a thickness direction of the double-sided display panel; The double-sided display panel further includes a second light shielding portion, wherein an orthographic projection of the second light shielding portion on the substrate is located between an orthographic projection of the first light emitting element on the substrate and an orthographic projection of the second light emitting element on the substrate; And / or, the double-sided display panel further includes a light-transmitting area, the light-transmitting area is at least arranged side by side with the array layer, and the second light-shielding portion is located between the light-transmitting area and the second light-emitting element; The array layer further includes a hollow portion, and the hollow portion is located between the second light-emitting element and the pixel driving unit; and / or, at least a portion of the hollow portion forms the light-transmitting area; Wherein, the second light shielding portion at least covers the side wall of the hollow portion.

2. The double-sided display panel according to claim 1, wherein: The first light emitting surface has a first pixel area, and the first light emitting element is located in the first pixel area; the second light emitting surface has a second pixel area, and the second light emitting element is located in the second pixel area.

3. The double-sided display panel according to claim 2, wherein: The first light emitting element and the second light emitting element are both electrically connected to the same pixel driving unit.

4. The double-sided display panel according to claim 1, wherein: The device further includes a first light shielding portion, which is located between the first light emitting element and the array layer, and is located on a side of the second light emitting element that faces away from the substrate.

5. The double-sided display panel according to claim 1, wherein: The projection of the second light emitting element in the first direction and the projection of the second light shielding portion in the first direction are at least partially overlapped.

6. The double-sided display panel according to claim 4, wherein: The first light shielding portion and the second light shielding portion are an integrated structure.

7. The double-sided display panel according to claim 1, wherein: The device further includes an electrode layer, wherein the electrode layer includes a first electrode layer and a second electrode layer, wherein the first electrode layer is located on a side of the array layer away from the substrate, and the second electrode layer is located on a side of the second light-emitting element facing the substrate; The first light-emitting element is electrically connected to the pixel driving unit through the first electrode layer, and the second light-emitting element is electrically connected to the pixel driving unit through the second electrode layer.

8. The double-sided display panel according to claim 7, wherein: The second electrode layer includes a first conductive connection portion, the array layer includes a first area and a second area, the first area is separated from the second area by the hollow portion, the first area is provided with the pixel driving unit, and the orthographic projection of the first light-emitting element on the substrate is located within the orthographic projection of the first area on the substrate, and the second area is provided with the second light-emitting element; The first conductive connection portion is located between the first area and the second area, and the second light-emitting element is electrically connected to the pixel driving unit through the first conductive connection portion.

9. The double-sided display panel according to claim 8, wherein: The second electrode layer also includes a second conductive connection portion, which is spaced apart from the first conductive connection portion, the second light-emitting element is electrically connected to the second conductive connection portion, and at least part of the orthographic projection of the light-emitting surface of the second light-emitting element on the substrate is located between the orthographic projection of the first conductive connection portion on the substrate and the orthographic projection of the second conductive connection portion on the substrate.

10. The double-sided display panel according to claim 9, wherein: The second electrode layer includes a first conductive layer and a second conductive layer. The first conductive layer and the second conductive layer are made of different materials. The transmittance of the second conductive layer is greater than that of the first conductive layer. The first conductive layer is made of a light-shielding material.

11. The double-sided display panel according to claim 10, wherein: The first conductive connection portion includes the first conductive layer and the second conductive layer, the second conductive layer is located at least on the side of the first conductive layer facing away from the substrate, and the orthographic projection of the second light-shielding portion on the substrate is located within the orthographic projection of the first conductive layer on the substrate, and the orthographic projection of the second conductive layer on the substrate overlaps with the orthographic projection of the second light-emitting element on the substrate.

12. The double-sided display panel according to claim 10, wherein: The second conductive connection portion includes at least the second conductive layer.

13. The double-sided display panel according to claim 8, wherein: The array layer also includes multiple protective layers, each of the protective layers is located between each of the first conductive connecting parts and the hollow part, the orthographic projection of the hollow part on the substrate is located within the orthographic projection of the protective layer on the substrate, and the orthographic projection of the protective layer on the substrate is located within the orthographic projection of the first conductive connecting part on the substrate.

14. The double-sided display panel according to claim 7, wherein: A plurality of functional layers are included between the substrate and the first electrode layer, and the second electrode layer is disposed on the same layer as at least one of the plurality of functional layers.

15. The double-sided display panel according to claim 14, wherein: The second electrode layer is disposed on a surface of the substrate facing the array layer, and the second electrode layer further includes a functional unit corresponding to the pixel driving unit.

16. The double-sided display panel according to claim 15, wherein: The functional unit is a bottom gate structure of the pixel driving unit or a light shielding unit that shields the active layer; The orthographic projection of the active layer on the substrate is located within the orthographic projection of the functional unit on the substrate.

17. The double-sided display panel according to claim 15, wherein: The second electrode layer is provided on the same layer as one of the functional layers in the array layer. The second light shielding portion is provided on both the side of the first conductive connection portion in the second electrode layer facing the substrate and the side facing away from the substrate.

18. The double-sided display panel according to claim 1, wherein: The double-sided display panel further includes a reflective portion, wherein a projection of the reflective portion along the first direction overlaps at least a portion of a projection of the first light emitting element along the first direction; And / or, a projection of the reflective portion along the first direction and a projection of the second light-emitting element along the first direction are at least partially overlapped.

19. The double-sided display panel according to claim 18, wherein: The reflective portion includes a first sub-reflective portion, which is located at least on a side of the second light-emitting element facing away from the substrate, and an orthographic projection of the second light-emitting element on the substrate is located within an orthographic projection of the first sub-reflective portion on the substrate.

20. The double-sided display panel according to claim 19, wherein: The first sub-reflecting portion is disposed on the same layer as a functional layer in the pixel driving unit.

21. A display device, characterized in that: Comprising the double-sided display panel as described in any one of claims 1-20.

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