Transparent display panel and its preparation method, display device

Abstract

This application provides a transparent display panel, its fabrication method, and a display device. In the transparent display panel provided in this application, a reflective layer is disposed on the side of the pixel definition layer away from the substrate in the light-emitting region of the pixel unit structure. The first opening of the pixel definition layer is located at least partially within the orthographic projection of the substrate, and the second opening of the reflective layer is located within the orthographic projection of the substrate. This allows some light emitted from the organic light-emitting unit to be reflected by the reflective layer and emitted from one side of the substrate, i.e., from one side of the transparent display panel; a portion of the light emitted from the organic light-emitting unit passes through the second opening and is emitted from the other side of the transparent display panel. This enables the light from the organic light-emitting unit in each pixel unit structure to be emitted from both sides of the transparent display panel, thereby achieving double-sided display of the transparent display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a transparent display panel, its preparation method, and a display device. Background Technology

[0002] With the development of display technology, there are more and more types of display products. For example, transparent display products and double-sided display products are becoming increasingly popular with consumers.

[0003] Currently, there is a lack of transparent display products on the market that can achieve double-sided display, which cannot meet the needs of consumers. Summary of the Invention

[0004] This application addresses the shortcomings of existing methods by proposing a transparent display panel, its preparation method, and a display device to solve the technical problem that transparent display panels in the prior art cannot display on both sides.

[0005] In a first aspect, embodiments of this application provide a transparent display panel, including a substrate, comprising: a plurality of pixel unit structures arranged in an array, disposed on one side of the substrate, wherein the pixel unit structure includes: a light-emitting region and a transparent region;

[0006] The light-emitting area includes: a pixel definition layer and multiple organic light-emitting units; the pixel definition layer includes multiple first openings, and the first opening is the effective light-emitting area of ​​the corresponding organic light-emitting unit;

[0007] The transparent display panel further includes: a reflective layer disposed on the side of the pixel defining layer away from the substrate, wherein at least a portion of the first opening is projected onto the substrate and the second opening is located within the projected image of the substrate.

[0008] The reflective layer is used to reflect a portion of the light emitted from the organic light-emitting unit in a first direction, so that the reflected light passes through the area between the organic light-emitting units and is emitted in a second direction; the first direction is the direction away from the organic light-emitting unit and the second direction is the direction of the pixel defining layer toward the substrate.

[0009] Secondly, embodiments of this application provide a display device, including: the transparent display panel provided in the first aspect above.

[0010] Thirdly, embodiments of this application provide a method for preparing a transparent display panel, comprising:

[0011] Multiple pixel unit structures are fabricated in an array on one side of a substrate. Each pixel unit structure includes a light-emitting region and a transparent region. The light-emitting region includes a pixel defining layer and multiple organic light-emitting units. The pixel defining layer includes multiple first openings, each of which is the effective light-emitting area of ​​the corresponding organic light-emitting unit.

[0012] A reflective material layer is prepared on the side of the pixel definition layer away from the substrate.

[0013] The patterned reflective material layer is obtained to form a reflective layer including a second opening, such that at least a portion of the first opening in the orthographic projection of the substrate is located within the orthographic projection of the second opening in the substrate.

[0014] The beneficial technical effects of the technical solutions provided in this application include:

[0015] In the transparent display panel provided in this application embodiment, a reflective layer is provided on the side of the pixel definition layer away from the substrate in the light-emitting region of the pixel unit structure, and the first opening of the pixel definition layer is located at least part of the orthographic projection of the substrate, while the second opening of the reflective layer is located within the orthographic projection of the substrate. This allows some of the light emitted from the organic light-emitting unit to be reflected by the reflective layer and emitted from one side of the substrate, i.e., from one side of the transparent display panel; a portion of the light emitted from the organic light-emitting unit passes through the second opening and is emitted from the other side of the transparent display panel. This enables the light from the organic light-emitting unit in each pixel unit structure to be emitted from both sides of the transparent display panel, thereby achieving double-sided display of the transparent display panel.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0018] Figure 1 A cross-sectional structural diagram of a first type of transparent display panel provided in an embodiment of this application;

[0019] Figure 2 Provided for the embodiments of this application Figure 1 A schematic diagram of the propagation path of light emitted from the organic light-emitting unit in the transparent display panel shown.

[0020] Figure 3 This is a top view of the pixel unit structure in a second type of transparent display panel provided in this application embodiment;

[0021] Figure 4 Provided for the embodiments of this application Figure 3 A schematic diagram of the anode structure and reflective layer of the light-emitting area of ​​the pixel unit structure in the transparent display panel shown;

[0022] Figure 5 Provided for the embodiments of this application Figure 3A schematic diagram of the pixel definition layer and reflective layer of the light-emitting area in the transparent display panel shown;

[0023] Figure 6 Provided for the embodiments of this application Figure 3 A schematic diagram of the first type of DD-direction cross-sectional structure in the transparent display panel shown;

[0024] Figure 7 Provided for the embodiments of this application Figure 3 The diagram shows the second type of DD-direction cross-sectional structure in the transparent display panel.

[0025] Figure 8 Provided for the embodiments of this application Figure 3 The diagram shows a third type of DD-direction cross-sectional structure in the transparent display panel.

[0026] Figure 9 Provided for the embodiments of this application Figure 3 The diagram shows the fourth type of DD-direction cross-sectional structure in the transparent display panel.

[0027] Figure 10 Provided for the embodiments of this application Figure 3 The diagram shows the fifth type of DD-direction cross-sectional structure in the transparent display panel.

[0028] Figure 11 Provided for the embodiments of this application Figure 1 The image shows a comparison test of the light emission brightness of a transparent display panel and a transparent display panel in the prior art;

[0029] Figure 12 A schematic flowchart illustrating a method for fabricating a transparent display panel according to an embodiment of this application;

[0030] Figures 13a-13m The diagram shows, in sequence, the active layer, first sub-conductive line, second sub-conductive line, interlayer dielectric layer, third sub-conductive line, first planarization layer, passivation layer, fourth sub-conductive line, second planarization layer, anode structure, pixel definition layer, support structure, and cathode structure of a pixel unit structure of a transparent display panel provided in this application embodiment after fabrication.

[0031] Figure 13n A schematic diagram of the reflective layer located on one side of a pixel unit structure in a transparent display panel, provided as an embodiment of this application;

[0032] Figure 14a Provided for the embodiments of this application Figure 13a active layer, Figure 13b The first sub-conducting wire, Figure 13c The second sub-conducting wire, Figure 13d Interlayer dielectric layer Figure 13e The third sub-conducting wire, Figure 13f The first flat layer Figure 13g passivation layer and Figure 13h A schematic diagram of the film structure after the fourth sub-conductive wire has been fabricated;

[0033] Figure 14b For the purposes of this application's embodiments Figure 14a Based on the shown film structure, the following layers are prepared sequentially. Figure 13i The second flat layer and Figure 13j A schematic diagram of the film structure after the anode structure is completed.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100 - Substrate; 200 - Pixel unit structure; 201 - Light-emitting area; 202 - Transparent area;

[0036] 10 - Reflective layer; 11 - Second opening of reflective layer 10;

[0037] 21-Pixel definition layer; 211-First opening of pixel definition layer 21;

[0038] 22-Organic light-emitting unit; 221-Anode structure; 221a-Anode structure of the first organic light-emitting unit 22; 221b-Anode structure of the second organic light-emitting unit 22; 221c-Anode structure of the third organic light-emitting unit 22; 221d-Electrode structure; 222-Hole transport layer; 223-Light-emitting material layer; 224-Electron transport layer; 225-Cathode structure;

[0039] 231 - Active layer; 232 - Interlayer dielectric layer; 2321 - Fourth opening of interlayer dielectric layer 232; 233 - First planarization layer; 2331 - Fifth opening of first planarization layer 233; 234 - Passivation layer; 2341 - Sixth opening of passivation layer 234; 235 - Second planarization layer; 2351a - Seventh opening of second planarization layer 235; 2351b - Eighth opening of second planarization layer 235; 236 - Support structure;

[0040] 31-First sub-reversed structure; 32-Second sub-reversed structure;

[0041] 40 - Encapsulation layer; 41 - First inorganic encapsulation layer; 42 - Organic encapsulation layer; 43 - Second inorganic encapsulation layer;

[0042] 50 - Buffer layer; 60 - Protective layer; 70 - Touch layer;

[0043] 801 - First conductive trace; 8011 - First sub-conductive trace; 8012 - Second sub-conductive trace; 802 - Second conductive trace; 8021 - Third sub-conductive trace; 8022 - Fourth sub-conductive trace;

[0044] 301 - First mask opening; 302 - Second mask opening; 303 - Third mask opening. Detailed Implementation

[0045] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0046] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the word “comprising” as used in this application's specification means the presence of the stated features, integers, steps, and / or operations, but does not exclude implementation as supported by this art, other features, information, data, steps, operations, and / or combinations thereof. The term “and / or” as used herein refers to at least one of the items defined by the term; for example, “A and / or B” can be implemented as “A,” or as “B,” or as “A and B.”

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0048] First, let me introduce and explain some of the terms involved in this application: OLED transparent display panel refers to a display area that has a light-transmitting area, so that objects or backgrounds behind the display panel are visible to the user in front of the display panel.

[0049] Due to material limitations, most organic light-emitting units in OLED transparent display panels are currently top-emitting or bottom-emitting types. This means that the light emitted by the organic light-emitting units can only be emitted towards one side of the display panel, resulting in OLED transparent display panels being able to display content only on one side.

[0050] Currently, most dual-sided display panels on the market use a combination of top-emitting and bottom-emitting pixels to achieve dual-sided display. However, this reduces the resolution of both displays, impacting the user experience. Furthermore, simultaneously incorporating both top-emitting and bottom-emitting organic light-emitting units into a transparent OLED display panel would require significant modifications to the existing manufacturing process, thereby substantially increasing the production cost.

[0051] Currently, double-sided display panels on the market also include those that combine two single-sided display panels together to achieve double-sided display. However, this significantly increases the weight and manufacturing cost of the double-sided display panel.

[0052] The transparent display panel, its preparation method, and the display device provided in this application are intended to solve the above-mentioned technical problems of the prior art.

[0053] The technical solution of this application and how it solves the above-mentioned technical problems are described in detail below with specific embodiments. It should be noted that the following embodiments can be referenced, borrowed, or combined with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be described again.

[0054] This application provides a transparent display panel, the structural schematic diagram of which is shown below. Figure 1 As shown, it includes: a substrate 100 and a plurality of pixel unit structures 200, the plurality of pixel unit structures 200 being arranged in an array on one side of the substrate 100.

[0055] The pixel unit structure 200 includes a light-emitting region 201 and a transparent region 202. The light-emitting region 201 includes a pixel definition layer 21 and a plurality of organic light-emitting units 22. The pixel definition layer 21 includes a plurality of first openings, and the first openings are the effective light-emitting areas of the corresponding organic light-emitting units 22.

[0056] The transparent display panel also includes a reflective layer 10 disposed on the side of the pixel defining layer 21 away from the substrate 100, with a first opening at least a portion of the orthographic projection of the substrate 100 located within the orthographic projection of the second opening 11 on the substrate 100.

[0057] The reflective layer 10 is used to reflect a portion of the light emitted from the organic light-emitting unit 22 in a first direction, so that the reflected light passes through the area between the organic light-emitting units 22 and is emitted in a second direction; the first direction is the direction in which the organic light-emitting unit 22 moves away from the substrate 100, and the second direction is the direction in which the pixel defining layer 21 faces the substrate 100.

[0058] In the transparent display panel provided in this application embodiment, a reflective layer 10 is provided on the side of the pixel definition layer 21 in the light-emitting region 201 of the pixel unit structure 200 away from the substrate 100, and the first opening of the pixel definition layer 21 is located at least part of the orthographic projection of the substrate 100, while the second opening 11 of the reflective layer 10 is located within the orthographic projection of the substrate 100. This allows some of the light emitted from the organic light-emitting unit 22 to be reflected by the reflective layer 10 and emitted from one side of the substrate 100, i.e., from one side of the transparent display panel; a portion of the light emitted from the organic light-emitting unit 22 passes through the second opening 11 and is emitted from the other side of the transparent display panel. This enables the light from the organic light-emitting unit 22 in each pixel unit structure 200 to be emitted from both sides of the transparent display panel, thereby achieving double-sided display of the transparent display panel.

[0059] In the embodiments of this application, such as Figure 1 As shown, the structure and working principle of the display panel provided in this application embodiment are illustrated by taking a pixel unit structure 200 disposed on one side of the substrate 100 as an example.

[0060] In this embodiment of the application, the pixel unit structure 200 includes a light-emitting region 201 and a transparent region 202, such as Figure 1 As shown, the light-emitting area 201 and the transparent area 202 are arranged adjacent to each other. Optionally, the light-transmitting area 202 can also be arranged to surround the light-emitting area 201. Those skilled in the art can set different arrangements of the light-emitting area 201 and the transparent area 202 according to actual needs.

[0061] In this embodiment, the light-emitting region 201 includes a pixel definition layer 21 and multiple organic light-emitting units 22, such as... Figure 1 As shown, the pixel definition layer 21 is provided with multiple first openings 211, each with a trapezoidal cross-sectional shape. Each first opening is the effective light-emitting area of ​​the corresponding organic light-emitting unit 22. It should be noted that the effective light-emitting area refers to the portion of the organic light-emitting unit 22 that is in contact with the corresponding anode and cathode structures and where charge is transported perpendicularly.

[0062] Optionally, in this embodiment of the application, all organic light-emitting units 22 in the transparent display panel are top-emitting type, that is, the emitted light of the organic light-emitting unit 22 can be emitted in the direction away from the substrate 100 along the direction of the organic light-emitting unit 22.

[0063] In the embodiments of this application, such as Figure 1 and Figure 2As shown, a reflective layer 10 is provided on the side of the pixel definition layer 21 away from the substrate 100. The reflective layer 10 is used to reflect a portion of the light emitted in the first direction from the effective light-emitting area of ​​the organic light-emitting unit 22. In particular, it is used to reflect the large-angle emitted light from the organic light-emitting unit 22, so that the reflected light passes through the area between the organic light-emitting units 22 and is emitted in the second direction. This portion of light then exits from one side of the transparent display panel (i.e., Figure 1 and Figure 2 The light is emitted from the lower side of the substrate, allowing the image to be displayed on that side. In this embodiment, the first direction is the direction in which the organic light-emitting unit 22 is away from the substrate 100, and the second direction is the direction in which the pixel defining layer 21 faces the substrate 100.

[0064] In the embodiments of this application, such as Figure 1 and Figure 2 As shown, at least a portion of the effective light-emitting area of ​​the corresponding organic light-emitting unit 22 in the orthographic projection of the substrate 100 is located within the orthographic projection of the second opening 11 of the reflective layer 10 onto the substrate 100. This allows a portion of the light emitted from the organic light-emitting unit 22 to directly pass through the second opening 11 of the reflective layer 10 and travel from the other side of the transparent display panel (i.e., Figure 1 and Figure 2 The light is emitted from the upper side of the transparent display panel, allowing the image to be displayed on that side as well. This enables the light from the organic light-emitting unit 22 in each pixel unit structure 200 to be emitted from both sides of the transparent display panel, thus achieving double-sided display of the transparent display panel.

[0065] Furthermore, in the light-transmitting display panel provided in this application embodiment, since the light emitted from the same organic light-emitting unit 22 can be emitted simultaneously from both sides, the resolution of both sides of the light-transmitting display panel can be guaranteed, thus ensuring a good user experience. No significant changes to the existing manufacturing process of OLED transparent display panels are required, avoiding a substantial increase in the manufacturing cost of OLED transparent display panels.

[0066] In the embodiments of this application, such as Figure 2 As shown, of the light reflected by the reflective layer 10, a portion of the light is emitted from the region between adjacent organic light-emitting units 22 in the light-emitting region 201 of the pixel unit structure 200; the other portion of the light is emitted from the transparent region 202 of the pixel unit structure 200. Since the light transmittance of the transparent region 202 is significantly higher than that of the region between adjacent organic light-emitting units 22, the light loss through the transparent region 202 is small, so that the display brightness on the other side of the transparent display panel meets the requirements.

[0067] It should be noted that, in the embodiments of this application, the first opening of the pixel definition layer 21 is at least a portion of the orthographic projection of the substrate 100, and the second opening 11 of the reflective layer 10 is within the orthographic projection of the substrate 100, specifically including the following three cases:

[0068] The first type is where the orthographic projection of the first opening onto the substrate 100 is entirely within the orthographic projection of the second opening 11 onto the substrate 100, and there is a certain distance between the edge of the orthographic projection of the first opening onto the substrate 100 and the edge of the orthographic projection of the second opening 11 onto the substrate 100. In this case, the area of ​​the effective light-emitting region of the organic light-emitting unit 22 is smaller than the area of ​​the corresponding second opening 11.

[0069] The second type is where the edge of the first opening projected onto the substrate 100 overlaps with the edge of the second opening 11 projected onto the substrate 100. In this case, the area of ​​the effective light-emitting region of the organic light-emitting unit 22 is equal to the area of ​​the corresponding second opening 11.

[0070] The third type is where the orthographic projection of the first opening onto the substrate 100 covers the orthographic projection of the second opening 11 onto the substrate 100, and there is a certain distance between the edge of the orthographic projection of the first opening onto the substrate 100 and the edge of the orthographic projection of the second opening 11 onto the substrate 100. In this case, the area of ​​the effective light-emitting region of the organic light-emitting unit 22 is larger than the area of ​​the corresponding second opening 11.

[0071] In one embodiment of this application, a transparent region 202 of a pixel unit structure 200 and transparent regions 202 of at least two adjacent pixel unit structures 200 surround a light-emitting region 201 of the pixel unit structure 200.

[0072] In the embodiments of this application, such as Figure 3 As shown, in this light-transmitting display panel, the top view shape of the pixel unit structure 200 is a quadrilateral, the top view shape of the light-emitting area 201 is also a quadrilateral, and it is located at one corner of the quadrilateral of the pixel unit structure 200. The remaining part is the transparent area 202. That is, in the pixel unit structure 200, the two adjacent boundary lines of the light-emitting area 201 are surrounded by the light-transmitting area 202.

[0073] In the embodiments of this application, such as Figure 3As shown, the light-transmitting display panel exemplarily illustrates four pixel unit structures 200. Optionally, the transparent area 202 of one pixel unit structure 200 and the transparent areas 202 of the three adjacent pixel unit structures 200 surround the light-emitting area 201 of the pixel unit structure 200. This allows the light emitted by the organic light-emitting unit 22 in the light-emitting area 201 of the pixel unit structure 200 to be reflected by the reflective layer 10 and then emitted from the light-transmitting area 202 of the adjacent pixel unit structures 200, thereby increasing the amount of light emitted from the other side of the transparent display panel and thus improving the display brightness on the other side of the transparent display panel.

[0074] It should be noted that, as Figure 3 As shown, solid line segments are used to mark the outlines of each pixel unit structure 200 and the light-emitting area 201 in each pixel unit structure 200, so as to intuitively understand the structure of the pixel unit structure 200 and the arrangement of the light-emitting area 201 and the transparent area 202. In actual light-transmitting display panel products, there are no solid line segments.

[0075] In one embodiment of this application, the edge of the reflective layer 10 projected onto the substrate 100 overlaps with the edge of the light-emitting region 201 projected onto the substrate 100.

[0076] In the embodiments of this application, such as Figure 1 and Figure 2 As shown, the edge of the reflective layer 10 projected onto the substrate 100 overlaps with the edge of the light-emitting region 201 projected onto the substrate 100. This avoids the reflective layer 10 on the side of the transparent region 202 away from the substrate 100, thus ensuring the light transmittance of the transparent region 202 and consequently ensuring the overall light transmittance of the transparent display panel.

[0077] At the same time, it can also make the portion of the light emitted by the organic light-emitting unit 22 that does not directly pass through the opening 11 of the reflective layer 10 be reflected by the reflective layer 10 as much as possible. In particular, it can improve the utilization rate of the large-angle light emitted by the organic light-emitting unit 22 being reflected by the reflective layer 10, thereby improving the display brightness on the other side of the transparent display panel and ensuring the display effect on the other side of the transparent display panel.

[0078] In one embodiment of this application, the organic light-emitting unit 22 includes: an anode structure 221 disposed on one side of the substrate 100; the orthographic projection of the anode structure 221 onto the reflective layer 10 covers the second opening 11, and at least one edge of the orthographic projection of the anode structure 221 onto the substrate 100 partially overlaps with at least one edge of the orthographic projection of the reflective layer 10 onto the substrate 100.

[0079] In the embodiments of this application, such as Figure 1 and Figure 2 As shown, each organic light-emitting unit 22 includes an anode structure 221, which is disposed on one side of the substrate 100. Figure 1 , Figure 2 and Figure 4 As shown, the orthographic projection of the anode structure 221 onto the reflective layer 10 covers the second opening 11, and at least one edge of the orthographic projection of the anode structure 221 onto the substrate 100 partially overlaps with at least one edge of the orthographic projection of the reflective layer 10 onto the substrate 100.

[0080] Optionally, such as Figure 4 As shown, the light-emitting area 201 of the pixel unit structure 200 is provided with three organic light-emitting units 22. The first organic light-emitting unit 22 includes an anode structure 221a, the second organic light-emitting unit 22 includes an anode structure 221b, and the third organic light-emitting unit 22 includes an anode structure 221c. Correspondingly, the reflective layer 10 is provided with three openings 11. Figure 4 As shown, the orthographic projections of anode structures 221a, 221b, and 221c onto the reflective layer 10 all cover the corresponding openings 11. Furthermore, the two edges of the orthographic projection of anode structure 221a onto the substrate 100 partially overlap with the two edges of the orthographic projection of the reflective layer 10 onto the substrate 100; the two edges of the orthographic projection of anode structure 221b onto the substrate 100 partially overlap with the two edges of the orthographic projection of the reflective layer 10 onto the substrate 100; and the two edges of the orthographic projection of anode structure 221c onto the substrate 100 partially overlap with the two edges of the orthographic projection of the reflective layer 10 onto the substrate 100.

[0081] It should be noted that, Figure 4 The anode structures 221a, 221b, and 221c are represented using a dot diagram. Furthermore, to facilitate illustrating the correspondence between the anode structures 221a, 221b, and 221c and the second opening 11, Figure 4 In this process, the reflective layer 10 was made transparent, therefore, Figure 4 The boundary lines of the intermediate anode structure 221a, anode structure 221b and anode structure 221c are represented by dashed lines. Figure 4 In the diagram, since part of the edge of the reflective layer 10 overlaps with two edges of the anode structures 221a, 221b and 221c, the overlapping edges are represented by solid lines.

[0082] In this embodiment of the application, in order to facilitate understanding of the positional relationship between the organic light-emitting unit 22 and the reflective layer 10, Figure 4In the diagram, dashed boxes are used to indicate the openings of the mask corresponding to the organic light-emitting unit 22. Specifically, the first organic light-emitting unit 22 corresponds to the first mask opening 301, the second organic light-emitting unit 22 corresponds to the second mask opening 302, and the third organic light-emitting unit 22 corresponds to the third mask opening 303.

[0083] In the embodiments of this application, such as Figure 1 and Figure 2 As shown, the organic light-emitting unit 22 further includes a hole transport layer 222, a light-emitting layer 223, an electron transport layer 224, and a cathode structure 225. The hole transport layer 222 is disposed on the side of the anode structure 221 away from the substrate 100. The light-emitting material layer 223 is disposed on the side of the hole transport layer 222 away from the substrate 100. The electron transport layer 224 is disposed on the side of the light-emitting layer 223 away from the substrate 100. The cathode structure 225 is disposed on the side of the electron transport layer 224 away from the substrate 100.

[0084] It should be noted that the hole transport layers 222 of each organic light-emitting unit 22 are connected into a whole layer, the electron transport layers 224 of each organic light-emitting unit 22 are connected into a whole layer, and the cathode structures 225 of each organic light-emitting unit 22 are connected into a whole layer.

[0085] In one embodiment of this application, the edge of the anode structure 221 projected onto the reflective layer 10 has a first predetermined distance range d1 with the second opening 11, the first predetermined distance range d1 being 1-10 micrometers.

[0086] In the embodiments of this application, such as Figure 4 As shown, the edge of the orthographic projection of the anode structure 221c onto the reflective layer 10 has a first predetermined distance range d1 with the edge of the second opening 11 closest to that edge. Optionally, in this embodiment, the edge of the orthographic projection of each anode structure 221 onto the reflective layer 10 has the same first predetermined distance range d1 with the edge of the second opening 11 closest to that edge.

[0087] Those skilled in the art will understand that the hole transport layer 222, the light-emitting layer 223, the electron transport layer 224, and the cathode structure 225 of the organic light-emitting unit 22 are stacked sequentially on the anode structure 221. Since the peripheral wall of the first opening has a certain inclination and the hole transport layer 222, the light-emitting layer 223, the electron transport layer 224, and the cathode structure 225 have a certain thickness, the area of ​​the effective light-emitting area of ​​the organic light-emitting unit 22 will be smaller than the area of ​​the anode structure 221.

[0088] In this embodiment, the first set distance range d1 is 1-10 micrometers, including the extreme values ​​of 1 micrometer and 10 micrometers. By setting the edge of the anode structure 221 to extend beyond the edge of the second opening 11, it is possible to prevent the area of ​​the effective light-emitting region from being smaller than the area of ​​the second opening 11, ensuring that the effective light-emitting region of the organic light-emitting unit 22 is directly opposite the second opening 11. Optionally, the distance between the edge of each anode structure 221 projected onto the reflective layer 10 and the edge of the second opening 11 closest to that edge is 3 micrometers.

[0089] In one embodiment of this application, the light-emitting region 201 includes at least three organic light-emitting units 22 for emitting light of different colors; along a direction parallel to the substrate 100, there is a first set spacing S1 between the anode structures 221 of any two adjacent organic light-emitting units 22, the first set spacing S1 being not less than 455 nanometers and not greater than the size of the first opening 211.

[0090] In this embodiment of the application, the light-emitting region 201 includes at least three organic light-emitting units 22 for emitting different colors of light. Optionally, the light-emitting region 201 includes three organic light-emitting units 22, which can emit red, green and blue light respectively.

[0091] In the embodiments of this application, such as Figure 2 As shown, some of the light reflected by the reflective layer 10 will pass between the anode structures 221 of two adjacent organic light-emitting units 22. By setting a first predetermined spacing S1 between the anode structures 221 of any two adjacent organic light-emitting units 22, diffraction of light in the area between the two adjacent anode structures 221 can be avoided, thereby ensuring the display effect on the other side of the light-transmitting display panel.

[0092] Optionally, such as Figure 4 As shown, anode structure 221a corresponds to organic light-emitting unit 22 that emits red light, anode structure 221b corresponds to organic light-emitting unit 22 that emits green light, and anode structure 221c corresponds to organic light-emitting unit 22 that emits blue light.

[0093] In this embodiment, the first predetermined spacing S1 is not less than 455 nanometers and not greater than the size of the first opening 211. Specifically, since the wavelength range of red light is 780–622 nanometers, the wavelength range of green light is 577–492 nanometers, and the wavelength range of blue light is 492–455 nanometers, it is only necessary to ensure that the first predetermined spacing S1 between the anode structures 221a, 221b, and 221c is not less than 780 nanometers to avoid significant diffraction of red, green, and blue light. Optionally, the minimum value of the first predetermined spacing S1 between the anode structures 221b and 221c can be 577 nanometers.

[0094] The first set spacing S1 is not greater than the size of the first opening 211, that is, the first set spacing S1 is not greater than the size of the effective light-emitting area of ​​the organic light-emitting unit 22, so as to prevent the spacing between the effective light-emitting areas of two adjacent organic light-emitting units 22 from being too large, which would cause the display screen to be discontinuous, thereby ensuring the display effect.

[0095] In one embodiment of this application, the edge of the second opening 11 projected onto the substrate 100 overlaps with the edge of the first opening 211 projected onto the substrate 100.

[0096] In the embodiments of this application, such as Figure 5 As shown, the edge of the second opening 11 of the reflective layer 10 projected onto the substrate 100 overlaps with the edge of the first opening 211 of the pixel definition layer 21 projected onto the substrate 100. This allows the portion of the light emitted from the effective light-emitting area of ​​the organic light-emitting unit 22 along the direction perpendicular to the substrate 100 to be directly emitted from the second opening 11 of the reflective layer 10, thereby ensuring the display brightness on this side of the transparent display panel and ensuring the display effect.

[0097] In the embodiments of this application, Figure 5 The meanings of other reference numerals in the accompanying drawings and Figure 4 The same applies; for details, please refer to the section above. Figure 4 The explanation will not be repeated here.

[0098] In one embodiment of this application, the transparent display panel further includes a first anti-reflection structure 31, disposed on the side of the reflective layer 10 away from the substrate 100, and having an opening corresponding to the second opening 11.

[0099] In this embodiment, since the reflective layer 10 is mostly made of metal, the side of the reflective layer 10 away from the substrate 100 will also reflect a large amount of ambient light, thus affecting the display effect, especially in scenarios with complex ambient light. Therefore, it is necessary to set up a corresponding structure to reduce the reflectivity of the side of the reflective layer 10 away from the substrate 100.

[0100] In the embodiments of this application, such as Figure 6 As shown, a first anti-reflection structure 31 is provided on the side of the reflective layer 10 away from the substrate 100. Optionally, the first anti-reflection structure 31 is made of the same material as BM (Black Matrix). The first anti-reflection structure 31 can absorb a large amount of ambient light incident on it, thereby preventing ambient light from incident on the side of the reflective layer 10 away from the substrate 100, thus ensuring the display effect of the transparent display panel. Figure 6As shown, the first anti-reflection structure 31 is provided with a third opening corresponding to the second opening 11 of the reflective layer 10, so as to avoid blocking the emission of light emitted by the organic light-emitting unit 22.

[0101] In one embodiment of this application, the transparent display panel further includes a second anti-reflection structure 32 disposed within the second opening 11, the color of the second anti-reflection structure 32 being the same as the color of the light emitted by the organic light-emitting unit 22.

[0102] In this embodiment, the cathode structure 225 also reflects ambient light, affecting the display effect, such as... Figure 6 As shown, a second anti-reflection structure 32 is provided within the second opening 11 of the reflective layer 10. Optionally, the material of the second anti-reflection structure 32 is the same as the material of the color resist, and the color of the second anti-reflection structure 32 is the same as the color of the light emitted by the corresponding organic light-emitting unit 22. Optionally, Figure 6 In the middle, from left to right, the three organic light-emitting units 22 emit red, green and blue light respectively, and correspondingly, from left to right, the three second anti-reflection structures 32 are red, green and blue respectively.

[0103] In this embodiment, by setting a second anti-reflection structure 32, only light of the same color as the light emitted by the organic light-emitting unit 22 is emitted, and the remaining light cannot be emitted, thereby reducing the amount of light reflected by the cathode structure 225 and ensuring the display effect of the transparent display panel.

[0104] Optionally, in the embodiments of this application, after the reflective layer 10 is prepared, a COE (Color-filter On Encapsulation) layer may be prepared on the side of the reflective layer 10 away from the substrate 100. The COE layer includes a BM and a color resist disposed in the opening of the BM.

[0105] In one embodiment of this application, the transparent display panel further includes: a stacked encapsulation layer 40, a buffer layer 50, and a protective layer 60 disposed on the side of the pixel unit structure 200 away from the substrate 100, with the encapsulation layer 40 close to the pixel unit structure 200; and a reflective layer 10 disposed between the encapsulation layer 40 and the protective layer 60.

[0106] In the embodiments of this application, such as Figure 7 As shown, on the side of the pixel unit structure 200 away from the substrate 100, an encapsulation layer 40, a buffer layer 50, and a protective layer 60 are stacked in sequence. The reflective layer 10 is disposed on the side of the buffer layer 50 away from the substrate 100, and the protective layer 60 is disposed on the side of the reflective layer 10 and fills the second opening 11 of the reflective layer 10. By providing the protective layer 60, the reflective layer 10 can be prevented from being oxidized, thereby improving the service life of the transparent display panel.

[0107] It should be noted that, in the embodiments of this application, the reflective layer 10 can be disposed on any film layer between the encapsulation layer 40 and the protective layer 60. Those skilled in the art can dispose of the reflective layer 10 on a suitable film layer according to the actual production process, so as to simplify the production process of the transparent display panel.

[0108] In the embodiments of this application, such as Figure 7 As shown, the transparent area 202 of the pixel unit structure 200 does not have a pixel definition layer 21, organic light-emitting unit 22 and other film structures. Therefore, there is a height difference between the transparent area 202 and the light-emitting area 201. The encapsulation layer 40 can also compensate for the height difference between the transparent area 202 and the light-emitting area 201.

[0109] In one embodiment of this application, the encapsulation layer 40 includes: a first inorganic encapsulation layer 41, an organic encapsulation layer 42, and a second inorganic encapsulation layer 43 stacked together, wherein the first inorganic encapsulation layer 41 is close to the pixel unit structure 200; and the reflective layer 10 is disposed between the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 42.

[0110] In the embodiments of this application, such as Figure 8 As shown, on the side of the pixel unit structure 200 away from the substrate 100, a first inorganic encapsulation layer 41, an organic encapsulation layer 42, and a second inorganic encapsulation layer 43 of the encapsulation layer 40 are stacked in sequence, and a reflective layer 10 is disposed between the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43.

[0111] In this embodiment, the reflective layer 10 can be disposed on any film layer between the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43. Those skilled in the art can dispose of the reflective layer 10 on a suitable film layer according to the actual production process, thereby simplifying the production process of the transparent display panel. In this implementation, since the reflective layer 10 is made of Al (aluminum), to facilitate the removal of damage to the organic encapsulation layer 42 during the preparation of the reflective layer 10, such as... Figure 8 As shown, the reflective layer 10 is disposed on the side of the first inorganic encapsulation layer 41 away from the substrate 100.

[0112] In the embodiments of this application, such as Figure 8 As shown, the first inorganic encapsulation layer 41 can compensate for the height difference between the transparent area 202 and the light-emitting area 201.

[0113] In one embodiment of this application, the transparent display panel further includes: a stacked encapsulation layer 40, a buffer layer 50, a touch layer 70, and a protective layer 60 disposed on the side of the pixel unit structure 200 away from the substrate 100, with the encapsulation layer 40 close to the pixel unit structure 200; and the reflective layer 10 and the touch electrodes of the touch layer 70 disposed on the same layer.

[0114] In the embodiments of this application, such as Figure 9 As shown, an encapsulation layer 40, a buffer layer 50, a touch layer 70, and a protective layer 60 are sequentially stacked on the side of the pixel unit structure 200 away from the substrate 100. In this embodiment, the reflective layer 10 can be disposed on any film layer between the encapsulation layer 40 and the protective layer 60.

[0115] Optionally, in this embodiment, the touch layer 70 is an FMLOC (Flexible Multi-Layer On Cell) layer, which includes multiple touch electrodes, and the reflective layer 10 is disposed on the same layer as a certain touch electrode of the FMLOC layer.

[0116] It should be noted that, in the embodiments of this application, the first anti-reflection structure 31 and / or the second anti-reflection structure 32 can be disposed on one side of the reflective layer 10, or on one side of the touch layer 70 or the buffer layer 50.

[0117] In the embodiments of this application, Figures 6-9 In the diagram, the organic light-emitting unit 22 is represented by a dashed box. For details on the specific film structure of the organic light-emitting unit 22, please refer to the section above. Figure 1 Description of the organic light-emitting unit 22 film structure. It should be noted that, for ease of understanding... Figures 6-9 In the schematic diagram of the DD-direction cross-sectional structure, the DD-direction section line is located at the position of the light-emitting region 201 of the pixel unit structure 200. Figure 4 The DD-direction section is marked in the luminescent area 201 shown.

[0118] In one embodiment of this application, the transparent region 202 includes a support structure made of the same material as the encapsulation layer 40 and / or the pixel definition layer 21 of the light-emitting region 201.

[0119] In this embodiment, since the transparent region 202 does not have a film structure such as the organic light-emitting unit 22, there is a height difference between the transparent region 202 and the light-emitting region 201. The height difference between the transparent region 202 and the light-emitting region 201 can be compensated by providing a support structure.

[0120] Optionally, such as Figure 7 and Figure 8 As shown, the support structure includes a portion of the encapsulation layer 40, thus allowing both the encapsulation layer 40 and the support structure to be fabricated simultaneously during the manufacturing process of the transparent display panel. Figure 8 As shown, the support structure includes a portion of the first inorganic encapsulation layer 41, thus allowing both the first inorganic encapsulation layer 41 and the support structure to be fabricated simultaneously during the production of the transparent display panel. This simplifies the manufacturing process of the transparent display panel.

[0121] Alternatively, a material with high light transmittance can be used to prepare the pixel definition layer 21. In this way, while preparing the pixel definition layer 21 in the light-emitting region 201, the pixel definition layer 21 can also be grown in the transparent region 202, so that the support structure subsequently prepared includes the material of the pixel definition layer 21.

[0122] In one embodiment of this application, the pixel unit structure 200 further includes multiple first conductive lines 801, a portion of which has a self-emissive region 201 extending to a transparent region 202; the portions of the first conductive lines 801 located in the transparent region 202 are parallel to each other.

[0123] In the embodiments of this application, such as Figure 10 As shown, the pixel unit structure 200 includes multiple first conductive lines 801. The self-emissive region 201 extends into the first conductive lines 801 of the transparent region 202, and the portions of each first conductive line 801 in the transparent region 202 are parallel to each other. This reduces the area occupied by the first conductive lines 801 in the transparent region 202, ensuring the light-transmitting area and transmittance of the light-transmitting region 202.

[0124] Optionally, such as Figure 10 As shown, the first conductive trace 801 includes a first sub-conductive trace 8011 and a second sub-conductive trace 8012. The first sub-conductive trace 8011 is the first gate trace, and the second sub-conductive trace 8012 is the second gate trace.

[0125] In one embodiment of this application, the pixel unit structure 200 further includes multiple second conductive lines 802, and a portion of the second conductive lines 802 have a self-emissive region 201 extending to a transparent region 202; among these second conductive lines 802, at least two second conductive lines 802 are located in different film layers, and the second conductive lines 802 located in different film layers overlap in the orthographic projection portion of the substrate 100.

[0126] In the embodiments of this application, such as Figure 10 As shown, the pixel unit structure 200 also includes multiple second conductive lines 802. Among the second conductive lines 802 extending from the self-emissive region 201 to the transparent region 202, at least two second conductive lines 802 are located in different film layers, and the second conductive lines 802 located in different film layers overlap in the orthographic projection of the substrate 100. This reduces the area occupied by the second conductive lines 802 in the transparent region 202, ensuring the light-transmitting area of ​​the light-transmitting region 202 and its light transmittance.

[0127] It should be noted that, due to Figure 10 The viewpoint is from above, so the second conductive trace 802 located on the upper layer will block the second conductive trace 802 located on the lower layer.

[0128] Optionally, in this embodiment, the second conductive trace 802 includes a source trace and a drain trace, which are located in different film layers. The portions of the source trace and the drain trace located in the transparent region 202 overlap in the orthographic projection of the substrate 100, thereby reducing the area occupied by the third conductive trace 803 in the transparent region 202, ensuring the light-transmitting area of ​​the light-transmitting region 202, and ensuring the light transmittance of the light-transmitting region 202.

[0129] It should be noted that, Figure 10 The pixel unit structure 200 omits the film layer structure such as the pixel definition layer 21 and the organic light-emitting unit 22, so as to make it easier to understand the arrangement of each trace. At the same time, the traces set in the light-emitting area 201 are represented by dashed lines so as to distinguish the part of each trace in the light-emitting area 201 and the part in the transparent area 202.

[0130] In one embodiment of this application, such as Figure 11 The image shown is a comparison test diagram of the light emission brightness of the transparent display panel provided in the embodiment of this application and the transparent display panel in the prior art. Figure 11 The horizontal axis represents the angle between the viewing angle and the display surface of the transparent display panel, and the vertical axis represents the brightness; Curve A represents the trend of the light emitted from the front of the transparent display panel in this embodiment as a function of the viewing angle, Curve B represents the trend of the light emitted from the back of the transparent display panel provided in this embodiment as a function of the viewing angle, and Curve C represents the trend of the light emitted from the back of the existing transparent display panel as a function of the viewing angle.

[0131] like Figure 11 As shown, existing transparent display panels have virtually no light emission from their back side, while the transparent display panel provided in this application clearly emits light from its back side. Within a viewing angle range of 5° to 35°, the light emission brightness from the back side can reach 35%-80% of the light emission brightness from the front side. The range of back side light emission brightness includes 35% and 80% of the front side light emission brightness. At specific viewing angles, the light emission brightness from the back side is close to that from the front side. For example, at a viewing angle of 10°, the light emission brightness from the back side can reach approximately 80% of the front side light emission brightness.

[0132] Based on the same inventive concept, this application provides a display device, including any of the transparent display panels provided in the above embodiments.

[0133] In this embodiment, the display device uses any of the transparent display panels provided in the foregoing embodiments. The principle and technical effects are described in the foregoing embodiments and will not be repeated here.

[0134] Based on the same inventive concept, this application provides a method for manufacturing a transparent display panel, the process flow diagram of which is shown below. Figure 12 As shown, the process includes the following steps S1201-S1203:

[0135] S1201, a plurality of pixel unit structures arranged in an array are prepared on one side of a substrate. The pixel unit structure includes a light-emitting region and a transparent region. The light-emitting region includes a pixel defining layer and a plurality of organic light-emitting units. The pixel defining layer includes a plurality of first openings, and the first openings are the effective light-emitting areas of the corresponding organic light-emitting units.

[0136] In this embodiment, multiple pixel unit structures 200 are arranged in an array on one side of the substrate 100. Each pixel unit structure 200 includes a light-emitting region 201 and a transparent region 202. The light-emitting region 201 includes a pixel defining layer 21 and multiple organic light-emitting units 22. The pixel defining layer 21 includes multiple first openings, which are the effective light-emitting areas of the corresponding organic light-emitting units 22. See the specific structure for details. Figures 1-10 As shown.

[0137] S1202, a reflective material layer is prepared on the side of the pixel definition layer away from the substrate.

[0138] In this embodiment, a reflective material layer is prepared on the side of the pixel definition layer 21 away from the substrate 100. Optionally, an encapsulation layer 40 is prepared on the side of the pixel definition layer 21 away from the substrate 100, a buffer layer 50 is prepared on one side of the encapsulation layer 40, and aluminum is deposited on one side of the buffer layer 50 to obtain the reflective material layer.

[0139] S1203, the patterned reflective material layer is used to obtain a reflective layer including a second opening, such that at least a portion of the first opening in the orthographic projection of the substrate is located within the orthographic projection of the second opening in the substrate.

[0140] In this embodiment, a patterned reflective material layer is used to form an opening in a predetermined area of ​​the reflective material layer, resulting in a reflective layer 10 including the opening 11. This ensures that at least a portion of the first opening, i.e., the effective light-emitting area of ​​the organic light-emitting unit 22, is projected onto the substrate 100, while the second opening 11 of the reflective layer 10 is projected onto the substrate 100. Optionally, the predetermined area can be determined based on the organic light-emitting unit 22.

[0141] Optionally, after the reflective layer 10 is prepared, a protective layer 60 is prepared on the side of the reflective layer 10 away from the substrate 100.

[0142] In the method for fabricating a transparent display panel provided in this application embodiment, a pixel unit structure 200 arranged in an array is first fabricated on one side of a substrate 100, and then a reflective layer 10 is fabricated in any film layer between the encapsulation layer 40 and the protective layer 60. This eliminates the need to change the fabrication process of the pixel unit structure 200 in the existing transparent display panel fabrication process. In particular, it eliminates the need to change the fabrication process of the pixel definition layer 21, the organic light-emitting unit 22, etc., thereby simplifying the transparent display panel fabrication process and reducing the fabrication difficulty and cost of the transparent display panel.

[0143] In one embodiment of this application, for ease of description, the specific steps of fabricating an array of multiple pixel unit structures on one side of the substrate in step S1201 above are illustrated using the example of fabricating a light-emitting region 201 of a pixel unit structure 200. Specifically, the steps include:

[0144] First, an active layer 231 is fabricated on one side of the substrate 100. The structure of the active layer 231 is as follows: Figure 13a As shown; optionally, the active layer 231 can be a poly layer (polysilicon layer).

[0145] Then, a first sub-conductive line 8011 is fabricated on the side of the active layer 231 away from the substrate 100. The structure of the first sub-conductive line 8011 is as follows: Figure 13b As shown. The first sub-conducting wire 8011 includes various structural types, including strip structures and block structures, optionally, such as... Figure 13b As shown, the first sub-conducting line 8011 includes a first sub-conducting line 8011a, a second sub-conducting line 8011b, a third sub-conducting line 8011c, a fourth sub-conducting line 8011d, and a fifth sub-conducting line 8011e. Optionally, the first sub-conducting line 8011 is a gate1 (first gate) trace, and the portion of the first sub-conducting line 8011 opposite to the active layer 231 serves as the first gate of the subsequently fabricated thin-film transistor.

[0146] Next, a second sub-conducting line 8012 is fabricated in the region of the active layer 231 not covered by the first sub-conducting line 8011. The second sub-conducting line 8012 partially covers the first sub-conducting line 8011, and the structure of the second sub-conducting line 8012 is as follows. Figure 13c As shown. The second sub-conducting wire 8012 includes various structural types, including strip structures and block structures, optionally, such as... Figure 13cAs shown, the second sub-conducting line 8012 includes a first type of second sub-conducting line 8012a, a second type of second sub-conducting line 8012b, a third type of second sub-conducting line 8012c, and a fourth type of second sub-conducting line 8012d; the block-shaped second type of second sub-conducting line 8012b has an opening. Optionally, the second sub-conducting line 8012 is a gate 2 (second gate) trace, and the portion of the second sub-conducting line 8012 opposite to the active layer 231 serves as the second gate of the thin-film transistor subsequently fabricated.

[0147] Then, an interlayer dielectric layer 232 is formed on the side of the second sub-conducting line 8012 away from the substrate 100. The structure of the interlayer dielectric layer 232 is as follows: Figure 13d As shown. In this embodiment of the application, the interlayer dielectric layer 232 is a monolithic film layer, that is, the outer edge contour of the interlayer dielectric layer 232 is flush with the outer edge contour of the light-emitting region 201, and a plurality of fourth openings 2321 are provided in the interlayer dielectric layer 232. Optionally, the interlayer dielectric layer 232 is an ILD (Inter-Layer dielectric).

[0148] Next, a third sub-conductive line 8021 of the second conductive line 802 is fabricated on the side of the interlayer dielectric layer 232 away from the substrate 100. The structure of the third sub-conductive line 8021 is as follows: Figure 13e As shown. The third sub-conducting line 8021 is connected to the active layer 231 through the fourth opening 2321 of the interlayer dielectric layer 232.

[0149] Optionally, such as Figure 13e As shown, the third sub-conducting line 8021 includes a first type of third sub-conducting line 8021a, a second type of third sub-conducting line 8021b, a third type of third sub-conducting line 8021c, a fourth type of third sub-conducting line 8021d, a fifth type of third sub-conducting line 8021e, a sixth type of third sub-conducting line 8021f, and a seventh type of third sub-conducting line 8021g.

[0150] Optionally, the third sub-conducting line 8021 can serve as a metal signal line or a source / drain electrode. Optionally, a portion of the third sub-conducting line 8021 can serve as the source electrode of the subsequently fabricated thin-film transistor. Optionally, the third sub-conducting line 8021 can be electrically connected to the Vdata signal terminal and the reset signal Vinit terminal.

[0151] Then, a first planarization layer 233 is prepared on the side of the third sub-conducting line 8021 away from the substrate 100. The structure of the first planarization layer 233 is as follows: Figure 13f As shown. In this embodiment, the first planarization layer 233 is a monolithic film layer, that is, the outer edge contour of the first planarization layer 233 is flush with the outer edge contour of the light-emitting region 201, as shown. Figure 13fAs shown, the first planarization layer 233 is provided with a plurality of fifth openings 2331. Optionally, the first planarization layer 233 is a PLN (Planarization layer), which serves to provide planarization and insulation.

[0152] Next, a passivation layer 234 is formed on the side of the first planarization layer 233 away from the substrate 100. The passivation layer 234 serves as an insulator, and its structure is as follows: Figure 13g As shown. In this embodiment, the passivation layer 234 is a monolithic film, meaning that the outer edge contour of the passivation layer 234 is flush with the outer edge contour of the light-emitting region 201, as shown. Figure 13g The passivation layer 234 shown includes a plurality of sixth openings 2341. For example... Figure 13f and Figure 13g As shown, the position of the sixth opening 2341 in the passivation layer 234 is the same as the position of the fifth opening 2331 in the first planarization layer 233, so that the fifth opening 2331 of the first planarization layer 233 and the sixth opening 2341 of the passivation layer 234 are connected, so that the third sub-conductive line 8021 can be connected to the conductive film layer subsequently prepared.

[0153] Then, a fourth sub-conductive line 8022 of the second conductive line 802 is fabricated on the side of the passivation layer 234 away from the substrate 100. The structure of the fourth sub-conductive line 8022 is as follows: Figure 13h As shown. The fourth sub-conducting wire 8022 is connected to the third sub-conducting wire 8021 through the fifth opening 2331 and the sixth opening 2341.

[0154] Optionally, such as Figure 13e As shown, the fourth sub-conducting line 8022 includes a first type of fourth sub-conducting line 8022a, a second type of fourth sub-conducting line 8022b, a third type of fourth sub-conducting line 8022c, a fourth type of fourth sub-conducting line 8022d, a fifth type of fourth sub-conducting line 8022e, and a sixth type of fourth sub-conducting line 8022f.

[0155] Optionally, the fourth sub-conducting line 8022 can serve as a metal signal line, source / drain electrode, or power supply line. Optionally, a portion of the fourth sub-conducting line 8022 can serve as the drain electrode of the subsequently fabricated thin-film transistor. Optionally, the fourth sub-conducting line 8022 can be electrically connected to the VSS signal terminal and the VDD signal terminal.

[0156] Next, a second planarization layer 235 is fabricated on the side of the fourth sub-conducting line 8022 away from the substrate 100. The structure of the second planarization layer 235 is as follows: Figure 13i As shown. In this embodiment, the second planarization layer 235 is also a monolithic film layer, that is, the outer edge contour of the second planarization layer 235 is flush with the outer edge contour of the light-emitting region 201; as shown. Figure 13iAs shown, the second planarization layer 235 includes multiple openings, including two types: a seventh opening 2351a and an eighth opening 2351b. Optionally, the second planarization layer 235 is a PLN (Planarization layer), which serves to provide planarization and insulation.

[0157] Then, on the side of the second planarization layer 235 away from the substrate 100, the anode structure 221 of each organic light-emitting unit is prepared, such as... Figure 13j As shown, the anode structure 221 of the pixel unit structure 200 includes three anode structures 221a, 221b, and 221c, each corresponding to an organic light-emitting unit. The various anode structures 221 are connected to the fourth sub-conductive line 8022 through the seventh opening 2351a of the second planarization layer 235. Figure 13j As shown, the pixel unit structure 200 also includes an electrode structure 221d, which is connected to the fourth sub-conductive line 8022 through an eighth opening 2351b. Optionally, the electrode structure 221d is connected to the first type of fourth sub-conductive line 8022a of the fourth sub-conductive line 8022 through the eighth opening 2351b.

[0158] Next, a pixel definition layer 21 is fabricated on the side of the anode structure 221 away from the substrate 100. The structure of the pixel definition layer 21 is as follows: Figure 13k As shown. The pixel definition layer 21 includes multiple first openings 211. Specifically, the first opening 211a corresponds to the anode structure 221a, the second opening 211b corresponds to the anode structure 221b, the third opening 211c corresponds to the anode structure 221c, and the fourth opening 211d corresponds to the electrode structure 221d.

[0159] Then, an organic light-emitting unit is fabricated on one side of the pixel definition layer 21, with the first opening 211 serving as the effective light-emitting area of ​​the organic light-emitting unit. Next, a support structure 236 is fabricated on one side of the organic light-emitting unit, the structure of which is as follows: Figure 13l As shown.

[0160] Then, a cathode structure 225 is fabricated on one side of the support structure 236 and in the portion of the organic light-emitting unit not covered by the support structure 236. The structure of the cathode structure 225 is as follows: Figure 13m As shown. In this embodiment of the application, each cathode structure 225 is connected to form an integral film layer, and the outer edge contour of the integral film layer is flush with the outer edge contour of the light-emitting region 201.

[0161] To facilitate understanding of the correspondence between cathode structure 225 and anode structure 221, as follows: Figure 13mAs shown, each cathode structure 225 is represented by a dashed box. Specifically, cathode structure 225a corresponds to anode structure 221a, cathode structure 225b corresponds to anode structure 221b, cathode structure 225c corresponds to anode structure 221c, and cathode structure 225d corresponds to electrode structure 221d.

[0162] Next, an encapsulation layer 40, a buffer layer 50, and / or a touch layer 70 are fabricated on the side of the cathode structure 225 away from the substrate 100. Then, a reflective layer 10 is fabricated on the side of any one of the encapsulation layer 40, buffer layer 50, and touch layer 70 away from the substrate 100. The reflective layer 10 is also a single integral film layer, and the outer edge contour of the reflective layer 10 is flush with the outer edge contour of the light-emitting region 201. Figure 13n As shown, the reflective layer 10 includes a plurality of second openings 11, which correspond to the first openings 211 of the pixel definition layer 21.

[0163] In the embodiments of this application, Figure 13a Active layer 231 Figure 13b First sub-conducting wire 8011 Figure 13c The second sub-conducting wire 8012, Figure 13d Interlayer dielectric layer 232 Figure 13e The third sub-conducting wire 8021 Figure 13f First flat layer 233 Figure 13g passivation layer 234 and Figure 13h The film structure after the fourth sub-conducting wire 8022 is prepared is as follows: Figure 14a As shown.

[0164] It should be noted that, for easier visual understanding... Figure 14a The stacking relationship of each membrane layer structure in the middle, Figure 14a The interlayer dielectric layer 232, the first planarization layer 233, and the passivation layer 234 have been transparently processed. The fourth opening 2321 of the interlayer dielectric layer 232 is blocked by the third sub-conductive line 8021, and the fifth opening 2331 of the first planarization layer 233 and the sixth opening 2341 of the passivation layer 234 are blocked by the fourth sub-conductive line 8022. Therefore... Figure 14a The aforementioned opening is not shown in the image.

[0165] In this embodiment, the membrane structure shown in 14a is prepared sequentially. Figure 13i The second flat layer 235 and Figure 13j The film structure after the completion of the anode structure 221 is as follows Figure 14b As shown, to facilitate a visual understanding of the layering relationship of the membrane structure, Figure 14bIn the process, the second planarization layer 235 is made transparent, and the seventh opening 2351a and the eighth opening 2351b of the second planarization layer 235 are blocked by the corresponding anode structure 221a, anode structure 221b, anode structure 221c and electrode structure 221d.

[0166] By applying the embodiments of this application, at least the following beneficial effects can be achieved:

[0167] 1. In the transparent display panel provided in this application embodiment, a reflective layer 10 is provided on the side of the pixel definition layer 21 in the light-emitting area 201 of the pixel unit structure 200 away from the substrate 100, and the first opening is located at least part of the orthographic projection of the substrate 100, while the second opening 11 of the reflective layer 10 is located within the orthographic projection of the substrate 100. This allows some of the light emitted from the organic light-emitting unit 22 to be reflected by the reflective layer 10 and emitted from one side of the substrate 100, i.e., from one side of the transparent display panel; a portion of the light emitted from the organic light-emitting unit 22 passes through the second opening 11 of the reflective layer 10 and is emitted from the other side of the transparent display panel. This allows the light from the organic light-emitting unit 22 in each pixel unit structure 200 to be emitted from both sides of the transparent display panel, thereby achieving double-sided display of the transparent display panel.

[0168] 2. In the method for preparing a transparent display panel provided in this application embodiment, a pixel unit structure 200 arranged in an array is first prepared on one side of a substrate 100, and then a reflective layer 10 is prepared in any film layer between the encapsulation layer 40 and the protective layer 60. This does not require changing the preparation process of the pixel unit structure 200 in the existing transparent display panel preparation process. In particular, it does not require changing the preparation process of the pixel definition layer 21, the organic light-emitting unit 22, etc., thereby simplifying the transparent display panel preparation process and reducing the preparation difficulty and cost of the transparent display panel.

[0169] Those skilled in the art will understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and solutions in the prior art that are similar to those disclosed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0170] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate directions or positional relationships based on the exemplary directions or positional relationships shown in the accompanying drawings. They are used to facilitate the description or simplification of the embodiments of this application and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0171] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0172] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0173] It should be understood that although the steps in the flowcharts of the accompanying drawings are shown sequentially according to the arrows, the order in which these steps are implemented is not limited to the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of this application, the steps in each process can be executed in other orders as required. Moreover, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages based on the actual implementation scenario. Some or all of these sub-steps or stages may be executed at the same time or at different times. In scenarios where the execution times are different, the execution order of these sub-steps or stages can be flexibly configured according to requirements, and this application does not limit this.

[0174] The above description is only a partial implementation of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application, without departing from the technical concept of this application, also fall within the protection scope of the embodiments of this application.

Claims

1. A transparent display panel, comprising a substrate, characterized in that, include: Multiple pixel unit structures arranged in an array are disposed on one side of the substrate, and the pixel unit structure includes: a light-emitting region and a transparent region; The light-emitting region includes: a pixel-defining layer and multiple organic light-emitting units; the pixel-defining layer includes multiple first openings, and the first opening is the effective light-emitting region of the corresponding organic light-emitting unit. The transparent display panel further includes: a reflective layer disposed on the side of the pixel defining layer away from the substrate, wherein the first opening is at least a portion of the orthographic projection of the substrate, and a second opening formed between two adjacent reflective layers is within the orthographic projection of the substrate. The reflective layer is used to reflect a portion of the light emitted from the organic light-emitting unit in a first direction, so that the reflected light passes through the region between the organic light-emitting units and is emitted in a second direction; the first direction is the direction in which the organic light-emitting unit moves away from the substrate, and the second direction is the direction in which the pixel defining layer moves towards the substrate; wherein, of the light reflected by the reflective layer, a portion of the light is emitted from the region between adjacent organic light-emitting units in the light-emitting region of the pixel unit structure; and another portion of the light is emitted from the transparent region of the pixel unit structure. The transparent region of one pixel unit structure and the transparent regions of at least two adjacent pixel unit structures enclose the light-emitting region of the pixel unit structure; It also includes at least one of the following: The first anti-reflection structure is disposed on the side of the reflective layer away from the substrate, and has a third opening corresponding to the second opening; A second anti-reflection structure is disposed within the second opening, and the color of the second anti-reflection structure is the same as the color of the light emitted by the organic light-emitting unit.

2. The transparent display panel according to claim 1, characterized in that, The reflective layer overlaps with the edge of the orthographic projection of the substrate at the same edge as the light-emitting area at the same edge of the orthographic projection of the substrate.

3. The transparent display panel according to claim 1, characterized in that, The organic light-emitting unit includes: An anode structure is disposed on one side of the substrate; the orthogonal projection of the anode structure onto the reflective layer covers the second opening, and at least one edge of the orthogonal projection of the anode structure onto the substrate partially overlaps with at least one edge of the orthogonal projection of the reflective layer onto the substrate.

4. The transparent display panel according to claim 3, characterized in that, The edge of the anode structure projected onto the reflective layer has a first predetermined distance range from the second opening, the first predetermined distance range being 1-10 micrometers.

5. The transparent display panel according to claim 1, characterized in that, The light-emitting region includes at least three organic light-emitting units for emitting different colors of light; Along a direction parallel to the substrate, there is a first predetermined spacing between the anode structures of any two adjacent organic light-emitting units, the first predetermined spacing being not less than 455 nanometers and not greater than the size of the first opening.

6. The transparent display panel according to claim 1, characterized in that, The second opening overlaps with the first opening at the edge of the orthographic projection of the substrate.

7. The transparent display panel according to claim 1, characterized in that, Also includes: A stacked encapsulation layer, buffer layer, and protective layer are disposed on the side of the pixel unit structure away from the substrate, with the encapsulation layer close to the pixel unit structure; The reflective layer is disposed between the encapsulation layer and the protective layer.

8. The transparent display panel according to claim 7, characterized in that, The encapsulation layer includes: a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked together, wherein the first inorganic encapsulation layer is close to the pixel unit structure; The reflective layer is disposed between the first inorganic encapsulation layer and the second inorganic encapsulation layer.

9. The transparent display panel according to claim 1, characterized in that, Also includes: A stacked encapsulation layer, buffer layer, touch layer, and protective layer are disposed on the side of the pixel unit structure away from the substrate, with the encapsulation layer close to the pixel unit structure; The reflective layer and the touch electrodes of the touch layer are disposed in the same layer.

10. The transparent display panel according to any one of claims 7 to 9, characterized in that, The transparent area includes a support structure, the material of which is the same as the material of the encapsulation layer and / or the pixel delimiting layer of the light-emitting area.

11. The transparent display panel according to claim 1, characterized in that, The pixel unit structure also includes multiple first conductive lines, some of which extend from the light-emitting area to the transparent area; In this first conductive trace, the portions located in the transparent region are parallel to each other.

12. The transparent display panel according to claim 1, characterized in that, The pixel unit structure also includes multiple second conductive lines, some of which extend from the light-emitting area to the transparent area; In this portion of the second conductive trace, at least two second conductive traces are located in different film layers, and the second conductive traces located in different film layers overlap in the orthographic projection portion of the substrate.

13. A display device, characterized in that, include: The transparent display panel according to any one of claims 1-12.

14. A method for preparing a transparent display panel as described in any one of claims 1-12, characterized in that, include: Multiple pixel unit structures are fabricated in an array on one side of a substrate. Each pixel unit structure includes a light-emitting region and a transparent region. The light-emitting region includes a pixel defining layer and multiple organic light-emitting units. The pixel defining layer includes multiple first openings, each of which is an effective light-emitting area of ​​the corresponding organic light-emitting unit. A reflective material layer is prepared on the side of the pixel defining layer away from the substrate. The reflective material layer is patterned to obtain a reflective layer including a second opening, such that at least a portion of the first opening in the orthographic projection of the substrate is located within the orthographic projection of the second opening in the substrate.

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