Pixel structure, display panel and preparation method thereof

Abstract

The application provides a pixel structure, a display panel and a preparation method thereof. The pixel structure comprises a plurality of sub-pixel units of different colors, the plurality of sub-pixel units are arranged to form a ring shape, and a transparent display area is formed in the inside of the ring shape. The sub-pixel unit comprises a main light-emitting sub-unit and a reflection sub-unit arranged along the circumferential direction of the ring shape; the main light-emitting sub-unit comprises a first reflection electrode, a light-emitting layer and a first transparent electrode which are sequentially stacked in a direction towards the transparent display area, and is used for emitting light towards the transparent display area; and the reflection sub-unit comprises a second transparent electrode, a light-emitting layer and a second reflection electrode which are sequentially stacked in a direction towards the transparent display area, and the second reflection electrode is used for reflecting light back into the transparent display area. The pixel structure can improve the display transparency and display brightness.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a pixel structure, a display panel and a preparation method thereof. BACKGROUND

[0002] With the development of transparent display technology, transparent display devices gradually appear in people's life. For example, in some areas, the scene of applying transparent window screens to trains has appeared to display real-time daily information such as weather forecast, news, train operation, train position and other traffic information. Not only transportation, but also transparent organic light emitting diode (OLED) display screens can be applied in buildings, commercial displays, offices and other scenes.

[0003] At present, the transparent display of the OLED panel is mainly realized by the transparent electrode, the self-luminous characteristic of the OLED and the design of increasing the transparent sub-pixel, which is regularly distributed in the whole display area. However, the light transmittance of the transparent sub-pixel is limited, which affects the improvement of the transparency. SUMMARY

[0004] The present application provides a pixel structure, a display panel and a preparation method thereof, aiming at solving the problem that the light transmittance of the transparent sub-pixel is limited in the prior art, which affects the improvement of the transparency.

[0005] In order to solve the above technical problems, the first technical solution provided by the present application is to provide a pixel structure. The pixel structure includes a plurality of sub-pixel units of different colors, and the plurality of sub-pixel units are arranged to form a ring shape, and a transparent display area is formed inside the ring shape.

[0006] Among them, the sub-pixel unit includes a main light emitting sub-unit and a reflection sub-unit arranged along the circumference of the ring shape; wherein the main light emitting sub-unit includes a first reflective electrode, a light emitting layer and a first transparent electrode which are sequentially stacked in the direction towards the transparent display area, for emitting light towards the transparent display area; the reflection sub-unit includes a second transparent electrode, a light emitting layer and a second reflective electrode which are sequentially stacked in the direction towards the transparent display area, and the second reflective electrode is used for reflecting light back into the transparent display area.

[0007] In some embodiments, in each sub-pixel unit, the main light emitting sub-unit and the reflection sub-unit are arranged adjacent to each other; and the main light emitting sub-unit of each sub-pixel unit is arranged adjacent to the reflection sub-unit of the adjacent sub-pixel unit.

[0008] In some embodiments, the pixel structure includes three sub-pixel units of different colors, and the three sub-pixel units are arranged to form a hexagonal ring shape.

[0009] In some embodiments, along the circumference of the transparent display area, the extension length of the main light-emitting sub-unit is greater than the extension length of the reflection sub-unit.

[0010] In some embodiments, the main light-emitting sub-unit of each sub-pixel unit is arranged in parallel with the reflection sub-unit of the adjacent sub-pixel unit.

[0011] In some embodiments, along the direction perpendicular to the pixel structure, the light-emitting layer comprises opposite first and second surfaces;

[0012] In the main light-emitting sub-unit, the first reflective electrode extends from the side surface of the light-emitting layer to the first surface, and the first reflective electrode covers the side surface of the light-emitting layer away from the transparent display area and the first surface; the main light-emitting sub-unit further comprises a first reflective sub-electrode arranged on the second surface, the first reflective sub-electrode is in contact with the first transparent electrode to form a first anode electrode, the first anode electrode covers the side surface of the light-emitting layer close to the transparent display area and the second surface; the first reflective electrode and the first anode electrode are arranged in isolation;

[0013] In the reflection sub-unit, the second reflective electrode extends from the side surface of the light-emitting layer to the first surface, and the second reflective electrode covers the side surface of the light-emitting layer close to the transparent display area and the first surface; the reflection sub-unit further comprises a second reflective sub-electrode arranged on the second surface, the second reflective sub-electrode is in contact with the second transparent electrode to form a second anode electrode, the second anode electrode covers the side surface of the light-emitting layer close to the transparent display area and the second surface; the second reflective electrode and the second anode electrode are arranged in isolation.

[0014] To solve the above technical problems, the second technical solution provided by the present application is to provide a display panel. The display panel comprises:

[0015] A driving substrate;

[0016] A plurality of pixel structures provided by the above technical solution are arranged on the driving substrate and electrically connected to the driving substrate.

[0017] In some embodiments, the pixel structure comprises three sub-pixel units of different colors, and the three sub-pixel units are arranged to form a hexagonal ring; and the plurality of pixel structures are spliced to form a honeycomb structure.

[0018] In some embodiments, the side of the two adjacent pixel structures close to each other shares a same pixel sub-unit; the shared pixel sub-unit serves as the main light-emitting sub-unit of one of the pixel structures and the reflection sub-unit of the other pixel structure; or,

[0019] The main light-emitting sub-unit of the pixel structure is arranged adjacent to the main light-emitting sub-unit of an adjacent pixel structure, six adjacent pixel structures are surrounded by the reflecting sub-units to form a hexagon, a transparent sub-display area is formed in the hexagon, and the reflecting sub-units emit light towards the transparent sub-display area.

[0020] To solve the above technical problems, a third technical solution provided by the present application is to provide a preparation method of a display panel. The preparation method comprises:

[0021] Manufacturing a driving substrate;

[0022] Manufacturing a plurality of light-emitting layers of different colors on the driving substrate;

[0023] Manufacturing a reflecting electrode and a transparent electrode on each of the opposite sides of each light-emitting layer to form a main light-emitting sub-unit or a reflecting sub-unit;

[0024] Each main light-emitting unit and the corresponding reflecting sub-unit constitute a sub-pixel unit, a plurality of sub-pixel units of different colors are surrounded to form a ring shape, a transparent display area is formed in the ring shape, and the transparent display area and the surrounding sub-pixel units constitute a pixel structure; in each pixel structure, the transparent electrode of the main light-emitting unit is located on the side close to the transparent display area, so that the main light-emitting unit emits light towards the transparent display area; and the reflecting electrode of the reflecting sub-unit is located on the side close to the transparent display area, so as to reflect light back into the transparent display area.

[0025] The beneficial effects of the present application: Different from the prior art, the present application provides a pixel structure, a display panel and a preparation method thereof. The pixel structure is applied to a display panel and includes a plurality of sub-pixel units of different colors. The plurality of sub-pixel units are arranged to form a ring shape, and a transparent display area is formed inside the ring shape. The sub-pixel unit includes a main light-emitting sub-unit and a reflection sub-unit arranged along the circumferential direction of the ring shape. The main light-emitting sub-unit includes a first reflection electrode, a light-emitting layer and a first transparent electrode arranged in sequence in the direction towards the transparent display area. The light of the light-emitting layer is emitted to the transparent display area through the first transparent electrode, and the light of the light-emitting layer is also reflected to the transparent display area through the first reflection electrode, thereby reducing light loss and improving display brightness. At the same time, the reflection sub-unit includes a second transparent electrode, a light-emitting layer and a second reflection electrode arranged in sequence in the direction towards the transparent display area. The light of other main light-emitting sub-units is reflected back to the transparent display area by the second reflection electrode, so that more light enters the transparent display area. By arranging sub-pixel units of different colors, the emitted light of the sub-pixel units of different colors can be mixed in the transparent display area by using the reflection principle, and the mixed light is emitted from both sides of the transparent display area, thereby realizing transparent display in the transparent display area. That is, by making the light of the sub-pixel units of different colors display in the transparent display area, the display area of the pixel structure in the internal transparent area of the ring shape can improve the area of the transparent display area while ensuring the display brightness, thereby improving the transparency of the display. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0027] Figure 1 is a planar structure schematic diagram of a pixel structure provided by the first embodiment of the present application;

[0028] Figure 2 is Figure 1 is a cross-sectional structure schematic diagram of an embodiment of the pixel structure in the direction of A-A;

[0029] Figure 3 is Figure 1 is a cross-sectional structure schematic diagram of another embodiment of the pixel structure in the direction of A-A;

[0030] Figure 4 is a planar structure schematic diagram of a pixel structure provided by the second embodiment of the present application;

[0031] Figure 5is a schematic diagram of a planar structure of a display panel provided by a first embodiment of the present application;

[0032] Figure 6 is a schematic diagram of a planar structure of a display panel provided by a second embodiment of the present application;

[0033] Figure 7 is a schematic diagram of a preparation method of a display panel provided by an embodiment of the present application;

[0034] Figure 8 is a schematic diagram of a preparation method of a display panel provided by another embodiment of the present application.

[0035] Reference signs:

[0036] 100 - display panel; 10 - driving substrate; 20 - pixel structure; 21 - sub-pixel unit; 211 - main light-emitting sub-unit; 212 - reflecting sub-unit; 221 - first reflecting electrode; 222 - second reflecting electrode; 223 - first transparent electrode; 224 - second transparent electrode; 225 - first reflecting sub-electrode; 226 - second reflecting sub-electrode; 23 - light-emitting layer; 231 - red light-emitting layer; 232 - green light-emitting layer; 233 - blue light-emitting layer; 24 - transparent display area; 251 - first anode electrode; 252 - first cathode electrode; 253 - second anode electrode; 254 - second cathode electrode; 30 - encapsulating layer;

[0037] R - red sub-pixel; R1 - red main light-emitting sub-unit; R2 - red reflecting sub-unit; G - green sub-pixel; G1 - green main light-emitting sub-unit; G2 - green reflecting sub-unit; B - blue sub-pixel; B1 - blue main light-emitting sub-unit; B2 - blue reflecting sub-unit; BM - black matrix. DETAILED DESCRIPTION

[0038] The scheme of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0039] In the following description, specific details are set forth in order to provide a thorough understanding of the present application. The purpose of the specifics is to enable one of ordinary skill in the art to practice the application without unnecessary delays.

[0040] The technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by one of ordinary skill in the art without making creative labor, belong to the scope of protection of the present application.

[0041] The terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply relative importance or a quantity of the indicated technical features. Thus, features with "first", "second", or "third" designation can implicitly or explicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise specifically defined. All directional references, such as up, down, left, right, front, back, etc., are in relation to the particular view being described and are used only for ease of description in the present application. If the particular view is changed, the directional references are also changed accordingly. Furthermore, the terms "comprise", "comprising", "have", "having", "include", "including", and "contains", "containing", or any other similar phrase are intended to cover a non-exclusive inclusion, such that a process, method, system, product, or device that comprises, has, includes, contains or contains one or more features, steps, units, or elements does not exclude the presence of one or more other features, steps, units, or elements not expressly listed or the possibility of double counting one or more features, steps, units, or elements.

[0042] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that the embodiments described herein are merely examples and are not a complete list of alternatives.

[0043] The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0044] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic plan view of a pixel structure provided by the first embodiment of the present application, Figure 2 is Figure 1FIG. 1 is a schematic diagram of a cross-sectional structure of an embodiment of a pixel structure in an A-A direction. In this embodiment, a pixel structure 20 is provided, which is applied to a display panel 100. The pixel structure 20 includes a plurality of sub-pixel units 21 of different colors, which are arranged in a ring shape, and a transparent display area 24 is formed in the inside of the ring. That is, the pixel structure 20 includes the transparent display area 24 and a plurality of sub-pixel units 21 arranged around the transparent display area 24, the plurality of sub-pixel units 21 are arranged in a ring shape, and the plurality of sub-pixel units 21 include sub-pixels of different colors, specifically, red sub-pixels R, green sub-pixels G, and blue sub-pixels B, and the number of sub-pixels of each color is at least one, so as to realize color display; in the following embodiments of the present application, red sub-pixels R, green sub-pixels G, and blue sub-pixels B are taken as examples for illustration. Of course, in other embodiments, the plurality of sub-pixel units 21 can also include sub-pixels of other colors, which can be set according to actual needs.

[0045] The sub-pixel unit 21 includes a main light-emitting sub-unit 211 and a reflection sub-unit 212 arranged along the circumferential direction of the ring shape. The main light-emitting sub-unit 211 includes a first reflection electrode 221, a light-emitting layer 23, and a first transparent electrode 223 arranged in sequence in the direction toward the transparent display area 24, so as to emit light toward the transparent display area 24.

[0046] That is, along the radial direction of the transparent display area 24, the main light-emitting sub-unit 211 includes the light-emitting layer 23 and the first reflection electrode 221 and the first transparent electrode 223 arranged on the opposite sides of the light-emitting layer 23, the first reflection electrode 221 is arranged on the side of the light-emitting layer 23 away from the transparent display area 24, and the first transparent electrode 223 is arranged on the side of the light-emitting layer 23 close to the transparent display area 24, so that the light-emitting surface of the main light-emitting sub-unit 211 faces the transparent display area 24, the light of the light-emitting layer 23 can be emitted to the transparent display area 24, the first reflection electrode 221 can be used to reflect the light of the light-emitting layer 23 to the transparent display area 24, so as to prevent the light of the main light-emitting sub-unit 211 from leaking to the adjacent pixel structure 20 and causing the problem of color bleeding, and also to improve the display brightness of the transparent display area 24. Specifically, the red light of the red main light-emitting sub-unit R1, the green light of the green main light-emitting sub-unit G1, and the blue light of the blue main light-emitting sub-unit B1 are all emitted to the transparent display area 24 and mixed, and then emitted from the upper and lower sides of the transparent display area 24, so as to realize the function of transparent display in the transparent display area 24.

[0047] The reflection sub-unit 212 includes a second transparent electrode 224, a light-emitting layer 23, and a second reflection electrode 222 arranged in sequence in the direction toward the transparent display area 24, and the second electrode can be used to reflect the light back to the transparent display area 24.

[0048] That is, along the radial direction of the transparent display area 24, the reflection sub-unit 212 comprises the light-emitting layer 23 and the second transparent electrode 224 and the second reflection electrode 222 arranged on the opposite sides of the light-emitting layer 23, the second transparent electrode 224 is arranged on the side of the light-emitting layer 23 away from the transparent display area 24, and the second reflection electrode 222 is arranged on the side of the light-emitting layer 23 close to the transparent display area 24, so that the reflection electrode layer of the reflection sub-unit 212 is arranged close to the transparent display area 24, and the light-emitting surface of the reflection sub-unit 212 is arranged in the direction away from the transparent display area 24, so that the second reflection electrode 222 can reflect the light back to the transparent display area 24 for further light mixing and display, thereby improving the display brightness.

[0049] Specifically, the first reflection electrode 221 of the plurality of main light-emitting sub-units 211 and the second reflection electrode 222 of the plurality of reflection sub-units 212 surround the periphery of the transparent display area 24 to form a light reflection cavity, so that the light emitted by the main light-emitting sub-unit 211 is uniformly mixed in the transparent display area 24 and emitted from both sides of the transparent display area 24, realizing the transparent display function, and also avoiding light leakage and color mixing, thereby improving the display brightness. It should be noted that the two sides of the transparent display area 24 mentioned herein refer to the opposite sides in the direction perpendicular to the transparent display. Through the arrangement of the pixel structure 20 as described above, the pixel structure 20 can effectively improve the transparency of the transparent display of the pixel structure 20, and also increase the area of the transparent display area 24, thereby further improving the transparency of the transparent display.

[0050] Moreover, by arranging the second transparent electrode 224 of the reflection sub-unit 212 on the side of the light-emitting layer 23 away from the transparent display area 24, the light of the reflection sub-unit 212 can be emitted to the outside of the transparent display area 24, so that when the pixel structure 20 is applied to the display panel 100, the light of the reflection sub-unit 212 can be emitted to the transparent display area 24 of the adjacent sub-pixel structure 20, that is, the reflection sub-unit 212 can act as a light-emitting sub-unit of the adjacent pixel structure 20, which is conducive to the close arrangement of the pixel structure 20, reduces the gap between adjacent pixel structures 20, and is conducive to the improvement of the pixel resolution.

[0051] Specifically, in the main light emitting sub-unit 211, the first reflective electrode 221 and the first transparent electrode 223 can be respectively as a cathode electrode and an anode electrode, or respectively as an anode electrode and a cathode electrode. In the reflective sub-unit 212, the second reflective electrode 222 and the second transparent electrode 224 can be respectively as a cathode electrode and an anode electrode, or respectively as an anode electrode and a cathode electrode. The material of the first reflective electrode 221 and the second reflective electrode 222 includes a high-reflectivity metal material, such as silver (Ag), aluminum (Al), zinc (Zn), copper (Cu), gold (Au), and the like, and silver can be used in the embodiment. Specifically, the first reflective electrode 221 and the second reflective electrode 222 can be a single-layer high-reflectivity metal electrode, or can also include a transparent conductive layer-metal layer-transparent conductive layer stacked structure, the material of the metal layer can include the high-reflectivity metal described above, such as Ag, and the material of the transparent conductive layer can include indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), and the like. The first transparent electrode 223 and the second transparent electrode 224 can be a transparent conductive layer, and the material of the transparent conductive layer can include the transparent conductive material described above.

[0052] In the embodiment, the pixel structure 20 includes three sub-pixel units 21 of different colors, specifically including a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, each of which includes the main light emitting sub-unit 211 and the reflective sub-unit 212 described above. That is, the pixel structure 20 includes three main light emitting sub-units 211 of different colors and corresponding three reflective sub-units 212 of different colors. The three main light emitting sub-units 211 of different colors and the corresponding three reflective sub-units 212 of different colors are arranged to form a hexagonal ring. The hexagonal design is conducive to the arrangement design of the pixel structure 20 on the display panel 100, and at the same time, the hexagonal design is also conducive to the symmetrical arrangement of the sub-pixel units 21, so as to improve the light mixing uniformity of the transparent display area 24.

[0053] The main light-emitting sub-unit 211 and the reflecting sub-unit 212 are arranged adjacent to each other in each sub-pixel unit 21. The main light-emitting sub-unit 211 of each sub-pixel unit 21 is arranged adjacent to the reflecting sub-unit 212 of the adjacent sub-pixel unit 21. It can be understood that, along the circumferential direction (clockwise or counterclockwise direction) of the transparent display area 24, the main light-emitting sub-unit 211 and the reflecting sub-unit 212 are arranged alternately. For example, along the counterclockwise direction, the arrangement mode of each sub-pixel unit 21 is: red reflecting sub-unit R2-red main light-emitting sub-unit R1-blue reflecting sub-unit B2-blue main light-emitting sub-unit B1-green reflecting sub-unit G2-green main light-emitting sub-unit G1. In this way, the main light-emitting sub-unit 211 is opposite to the reflecting sub-unit 212 on the opposite side along the light-emitting direction, which is beneficial to the reflection of light. Moreover, the main light-emitting sub-unit and the reflecting sub-unit 212 are arranged alternately and equally spaced along the circumferential direction of the transparent display area 24, which is beneficial to improve the light mixing uniformity of the transparent display area 24 and the light distribution uniformity of the transparent display area 24, thereby improving the display effect.

[0054] In the embodiment, the main light-emitting sub-unit 211 of each sub-pixel unit 21 is arranged parallel to the reflecting sub-unit 212 of the adjacent sub-pixel unit 21. That is, each main light-emitting sub-unit 211 is opposite to and parallel to the reflecting sub-unit 212 on the opposite side, which can make the reflection angle of light in each direction more balanced when the reflecting sub-unit 212 reflects light, thereby improving the light mixing uniformity and the light distribution uniformity. Moreover, the pixel structure 20 has a regular shape, for example, the pixel structure 20 is a regular hexagon in the embodiment, which is beneficial to the arrangement design of the pixel structure 20 on the real panel, thereby improving the pixel density.

[0055] Of course, in other embodiments, the pixel structure 20 can also have other shapes, for example, triangular, quadrilateral, hexagonal, other polygonal or circular, elliptical and the like, which can be arranged according to the number of sub-pixel units 21 and the pixel arrangement design scheme. In each sub-pixel unit 21, the main light-emitting sub-unit 211 and the reflecting sub-unit 212 can be arranged in line or at an angle, or the main light-emitting sub-unit 211 can also be arc-shaped, which can be arranged according to actual needs.

[0056] Please refer to Figure 3 , Figure 3 is Figure 1 is a schematic view of the cross-sectional structure of another embodiment of the pixel structure 20 in the A-A direction. In the embodiment, the light-emitting layer 23 includes opposite first and second surfaces along the direction perpendicular to the pixel structure 20.

[0057] In the main light-emitting sub-unit 211, the first reflective electrode 221 extends from the side of the light-emitting layer 23 to the first surface, and the first reflective electrode 221 covers the side of the light-emitting layer 23 away from the transparent display area 24 and the first surface; the main light-emitting sub-unit 211 further includes a first reflective sub-electrode 225 arranged on the second surface, the first reflective sub-electrode 225 is in contact with the first transparent electrode 223 and is electrically connected to form a first anode electrode 251, the first anode electrode 251 covers the side of the light-emitting layer 23 close to the transparent display area 24 and the second surface; the first reflective electrode 221 is arranged in insulation with the first anode electrode 251.

[0058] Wherein, the side wall surface of the light-emitting layer 23 away from the transparent display area 24 is defined as the outer side wall surface, the side wall surface of the light-emitting layer 23 close to the transparent display area 24 is defined as the inner side wall surface, the first surface of the light-emitting layer 23 is defined as the top surface, and the second surface of the light-emitting layer 23 is defined as the bottom surface. It can be understood that, in the main light-emitting sub-unit 211, the first reflective electrode 221 is in the shape of "L" and covers the outer side wall surface and the top surface of the light-emitting layer 23, the first anode electrode 251 includes the first transparent electrode 223 and the first reflective sub-electrode 225 which are in contact with each other and are electrically connected to form an "L"-shaped electrode, the first transparent electrode 223 is arranged on the inner side wall surface of the light-emitting layer 23, and the first reflective sub-electrode 225 is arranged on the bottom surface of the light-emitting layer 23, so that in the main light-emitting sub-unit 211, the top surface, the bottom surface and the outer side wall surface of the light-emitting layer 23 are all covered by electrodes with reflective properties, so that the light of the light-emitting layer 23 can only be emitted to the transparent display area 24 through the first transparent electrode 223 arranged on the inner side wall surface, the light loss of the light-emitting layer 23 is reduced, the display brightness of the transparent display area 24 is improved, the driving voltage of the sub-pixel unit 21 can be reduced, thereby improving the product life. Moreover, by making the first reflective electrode 221 cover the outer side wall surface and the top surface of the light-emitting layer 23, the contact area between the light-emitting layer 23 and the first reflective electrode 221 is increased, and by making the first anode electrode 251 cover the inner side wall surface and the bottom surface of the light-emitting layer 23, the contact area between the light-emitting layer 23 and the first anode electrode 251 is increased, thereby increasing the area of the light-emitting material in contact with the driving voltage, improving the light extraction efficiency, and further improving the light-emitting brightness of the main light-emitting sub-unit 211, thereby further improving the display brightness of the transparent display area 24. It should be noted that the first reflective electrode 221 and the first anode electrode 251 need to be arranged in insulation, and the problem of short circuit of the electrode signal. Specifically, the first reflective electrode 221 is the first cathode electrode 252 of the light-emitting layer 23, and the first transparent electrode 223 and the first reflective sub-electrode 225 are the first anode electrode 251 of the light-emitting layer 23. The material of the light-emitting layer 23 is an organic light-emitting material, which can be made by processes such as evaporation.

[0059] In the reflection sub-unit 212, the second reflection electrode 222 extends from the side of the light-emitting layer 23 to the first surface, and the second reflection electrode 222 covers the side of the light-emitting layer 23 close to the transparent display area 24 and the first surface; the reflection sub-unit 212 further comprises a second reflection sub-electrode 226 arranged on the second surface, the second reflection sub-electrode 226 is in contact and electrically connected with the second transparent electrode 224 to form a second anode electrode 253, the second anode electrode 253 covers the side of the light-emitting layer 23 close to the transparent display area 24 and the second surface; the second reflection electrode 222 is arranged in insulation with the second anode electrode 253.

[0060] It can be understood that, in the reflection sub-unit 212, the second reflection electrode 222 is in the shape of “L” and covers the inner side wall surface and the top surface of the light-emitting layer 23, the second anode electrode 253 comprises the second transparent electrode 224 and the second reflection sub-electrode 226 which are in contact and electrically connected with each other to form an “L”-shaped electrode, the second transparent electrode 224 is arranged on the outer side wall surface of the light-emitting layer 23, and the second reflection sub-electrode 226 is arranged on the bottom surface of the light-emitting layer 23, so that in the reflection sub-unit 212, the top surface, the bottom surface and the inner side wall surface of the light-emitting layer 23 are all covered by the electrodes with reflection performance, so that the light of the light-emitting layer 23 can only be emitted to the outside of the transparent display area 24 through the first transparent electrode 223 arranged on the outer side wall surface, for example, on the display panel 100, the light of the light-emitting layer 23 can be emitted to the transparent display area 24 of the adjacent pixel structure 20, which can prevent the reflection sub-unit 212 from leaking light and affecting the display of the transparent display area 24. Moreover, by making the second reflection electrode 222 cover the inner side wall surface and the top surface of the light-emitting layer 23, the contact area between the light-emitting layer 23 and the second reflection electrode 222 is increased, and by making the second anode electrode 253 cover the outer side wall surface and the bottom surface of the light-emitting layer 23, the contact area between the light-emitting layer 23 and the second anode electrode 253 is increased, so that the area of the light-emitting material contacting the driving voltage is increased, the light extraction efficiency is improved, the luminous brightness of the reflection sub-unit 212 is further improved, and thus when the reflection electrode is used as the light-emitting unit of the adjacent pixel structure 20, the display brightness of the adjacent transparent display area 24 can be further improved, so that the driving voltage of the product can be further reduced and the service life of the product can be improved. It should be noted that the second reflection electrode 222 and the second anode electrode 253 need to be arranged in insulation, and the problem of short circuit of the electrode signal. Specifically, the second reflection electrode 222 is used as the second cathode electrode 254 of the light-emitting layer 23, and the second anode electrode 253 is used as the anode electrode of the light-emitting layer 23. The material of the light-emitting layer 23 is an organic light-emitting material, which can be made by processes such as evaporation.

[0061] Please refer to Figure 4 , Figure 4is a planar structure schematic diagram of the pixel structure 20 provided in the second embodiment of the present application. In the embodiment, the specific structure of the pixel structure 20 is the same as that in the above embodiments, and the specific details can be referred to the above detailed description. The difference is that, in the pixel structure 20 provided in the embodiment, along the circumference of the transparent display area 24, the extension length of the main light-emitting sub-unit 211 is greater than that of the reflecting sub-unit 212.

[0062] Specifically, in each sub-pixel unit 21, the length of the main light-emitting sub-unit 211 is greater than the extension length of the reflecting sub-unit 212, so that the light-emitting area of the main light-emitting sub-unit 211 is larger, the light-emitting brightness of the main light-emitting sub-unit 211 is improved, and thus the display brightness of the pixel structure 20 in the transparent display area 24 is improved.

[0063] In the embodiment, the main light-emitting sub-unit 211 and the reflecting sub-unit 212 of each sub-pixel unit 21 are not collinear, and the pixel structure 20 has a hexagonal structure, i.e., the red sub-pixel R unit 21, the green sub-pixel G unit 21 and the blue sub-pixel B unit 21 are arranged to form a hexagon, and the transparent display area 24 is hexagonal. The lengths of the red main light-emitting sub-unit R1, the green main light-emitting sub-unit G1 and the blue main light-emitting sub-unit B1 are the same, and the lengths of the red reflecting sub-unit, the green reflecting sub-unit G2 and the blue reflecting sub-unit B2 are the same, so as to form a regular hexagon.

[0064] In other embodiments, the lengths of the red main light-emitting sub-unit R1, the green main light-emitting sub-unit G1 and the blue main light-emitting sub-unit B1 can be sequentially increased, so that the service life of the three is kept the same, and the different service lives and aging degrees of the main light-emitting sub-units 211 of different colors caused by different decay speeds of the light-emitting materials of different colors are avoided, so as to affect the display effect. In other embodiments, the main light-emitting sub-units 211 and the reflecting sub-units 212 of the same color can also be arranged not adjacent, for example, the main light-emitting sub-units 211 and the reflecting sub-units 212 of the same color can be arranged opposite to each other, so as to increase the design flexibility of the pixel structure 20, and be beneficial to the shape design and arrangement design of the pixel structure 20, so as to improve the pixel density and the display effect.

[0065] In the embodiment of the present application, the pixel structure 20 is arranged on one side of the driving substrate 10, and the pixel structure 20 further comprises an encapsulation layer 30, the encapsulation layer 30 covers each sub-pixel unit 21 and fills the transparent display area 24, and is planarized on the side of the sub-pixel unit 21 away from the driving substrate 10. The encapsulation layer 30 is specifically a transparent material, comprising a first inorganic encapsulation layer 30, an organic encapsulation layer 30 and a second inorganic encapsulation layer 30 arranged in layers, so as to seal the sub-pixel unit 21 and avoid external water and oxygen from invading the organic light-emitting layer 23, so as to avoid problems such as failure of the sub-pixel unit 21.

[0066] Further, in the pixel structure 20 provided in the embodiments of the present application, a black matrix BM is arranged between adjacent sub-pixel units 21 and between adjacent main light-emitting sub-units 211 and reflective sub-units 212, so as to isolate adjacent pixel sub-units and avoid color mixing between adjacent sub-units.

[0067] Please refer to Figure 5 , Figure 5 is a schematic diagram of a planar structure of a display panel provided in a first embodiment of the present application. In the embodiment, a display panel 100 is provided, which includes a driving substrate 10 and a plurality of pixel structures 20 as provided in the above embodiments. The plurality of pixel structures 20 are arranged on the driving substrate 10 in a preset arrangement manner and are electrically connected with the driving substrate 10, so as to drive the pixel units to display corresponding images through the driving substrate 10.

[0068] The pixel structure 20 includes three sub-pixel units 21 of different colors, and the three sub-pixel units 21 are arranged to form a hexagonal ring; and the plurality of pixel structures 20 are spliced with each other to form a honeycomb structure. The specific structure and functions of the pixel structure 20 are the same as or similar to those of the above embodiments, and the same technical effects can be achieved. For details, please refer to the above description, which will not be repeated here.

[0069] In the embodiment, the pixel structure 20 is hexagonal in shape, and two adjacent pixel structures 20 share a same pixel sub-unit on one side close to each other; the shared pixel sub-unit serves as a main light-emitting sub-unit 211 of one of the two pixel structures 20 and as a reflective sub-unit 212 of the other pixel structure 20. By sharing a same pixel sub-unit, the pixel sub-unit on each side of the hexagon can serve as a main light-emitting sub-unit 211 of one of the two pixel structures 20 for light emission, and also can serve as a reflective sub-unit 212 of the adjacent pixel structure 20 for light reflection, thereby improving the utilization rate of the pixel sub-unit, and further improving the opening area of the transparent display area 24, and further improving the pixel density and the display transparency.

[0070] Please refer to Figure 6 , Figure 6 is a schematic diagram of a planar structure of a display panel provided in a second embodiment of the present application. In the embodiment, the main light-emitting sub-units 211 of the pixel structures 20 are arranged adjacent to the main light-emitting sub-units 211 of adjacent pixel structures 20, the reflective sub-units 212 of every six adjacent pixel structures 20 form a hexagon, a transparent sub-display area 241 is formed inside the hexagon, and the reflective sub-units 212 emit light towards the transparent sub-display area 241.

[0071] In the embodiment, the two main light emitting sub-units 211 on the side close to each other of each two adjacent pixel structures 20 are of the same color, which is conducive to the manufacture of the light emitting layer 23. Meanwhile, by surrounding the emission sub-units on the side close to each other of each six adjacent pixel structures 20 to form a hexagon, a transparent sub-display area 241 is formed inside the hexagon, so that the reflection sub-units 212 can emit light towards the transparent sub-display area 241. It can be understood that, each six adjacent pixel structures 20 are surrounded, and the side close to each other of the six pixel structures 20 is surrounded to form a hexagonal transparent area, i.e., the transparent sub-display area 241, and the transparent sub-display area 241 is surrounded by six reflection sub-units 212, which are used for emitting light to the transparent sub-display area 241 and mixing light, so as to perform transparent display. The transparent sub-display area 241 and the surrounding reflection sub-units 212 constitute a new pixel unit, which not only makes the arrangement of the pixel structures 20 more compact, but also the reflection sub-units 212 in each pixel structure 20 can also serve as a sub-light emitting unit of the new pixel unit, thereby improving the utilization rate of the reflection sub-units 212 and avoiding the waste of the light emitting element caused by using the reflection sub-units 212 only as reflection units.

[0072] In other embodiments, the arrangement structure of the plurality of pixel structures 20 can also be other forms, which are not limited to the above two embodiments, and can be set according to actual design needs and display requirements. The above two embodiments are only used as examples for description, and do not represent that the arrangement structure of the pixel structures 20 only includes the arrangement structures in the above two embodiments.

[0073] Please refer to Figure 7 , Figure 7 is a flowchart of a preparation method of a display panel provided in an embodiment of the present application. The embodiment provides a preparation method of a display panel 100, which is used to prepare the display panel 100 involved in the above embodiments. The preparation method includes:

[0074] S10: manufacturing a driving substrate 10;

[0075] S20: manufacturing a plurality of light emitting layers 23 of different colors on the driving substrate 10;

[0076] S30: manufacturing a reflection electrode and a transparent electrode on the opposite sides of each light emitting layer 23, respectively, to form a main light emitting sub-unit 211 or a reflection sub-unit 212.

[0077] Wherein, each main light emitting unit and the corresponding reflective sub-unit 212 form a sub-pixel unit 21, and multiple sub-pixel units 21 of different colors are arranged to form a ring shape, a transparent display area 24 is formed in the inside of the ring shape, and the transparent display area 24 and the multiple sub-pixel units 21 around the transparent display area 24 form a pixel structure 20; in each pixel structure 20, the transparent electrode of the main light emitting unit is located on the side close to the transparent display area 24, so that the main light emitting unit emits light towards the inside of the transparent display area 24; and the reflective electrode of the reflective sub-unit 212 is located on the side close to the transparent display area 24, so as to reflect light back into the transparent display area 24.

[0078] It should be noted that the order of manufacturing the light emitting layer 23 and the electrodes in steps S20 and S30 can be adjusted according to the shapes of the reflective electrodes and the transparent electrodes.

[0079] In this embodiment, the specific structures of the main light emitting sub-unit 211 and the reflective sub-unit 212 are the same as those of the main light emitting sub-unit 211 and the reflective sub-unit 212 in the embodiment. Figure 2 In the embodiment, the light emitting layer 23 can be manufactured by step S20 first, and then the first reflective electrode 221, the second reflective electrode 222, the first transparent electrode 223 and the second transparent electrode 224 can be manufactured by step S30.

[0080] The display panel 100 manufactured by the embodiment can effectively improve the display brightness and the display transparency, and the specific structure and function of the display panel 100 are the same as those of the display panel 100 in the above embodiment, and the same technical effects can be achieved. For specific structures and technical effects, please refer to the above description.

[0081] Please refer to Figure 8 , Figure 8 is a flowchart of a manufacturing method of a display panel provided by another embodiment of the present application. The manufacturing method provided by the embodiment can be used to manufacture a display panel 100 comprising a pixel structure 20 as described above. Figure 3 The manufacturing method comprises:

[0082] S10: manufacturing a driving substrate 10;

[0083] S31: manufacturing a first reflective sub-electrode 225 and a second reflective sub-electrode 226 on the driving substrate 10;

[0084] S21: manufacturing different color light emitting layers 23 on the first reflective sub-electrode 225 and the second reflective sub-electrode 226 respectively;

[0085] S32: manufacturing a first reflective electrode 221 or a second reflective electrode 222 on the side wall surface and the top surface of the light emitting layer 23 as a cathode electrode of the light emitting layer 23;

[0086] S33: A first transparent electrode 223 or a second transparent electrode 224 is made on the sidewall surface of the light-emitting layer 23, and the first transparent electrode 223 is connected to the first reflective sub-electrode 225, and the second transparent electrode 224 is connected to the second reflective sub-electrode 226;

[0087] S40: An encapsulation layer 30 is made on the side of the main light-emitting sub-unit 211 and the reflective sub-unit 212 away from the driving substrate 10, and the encapsulation layer 30 fills the transparent display area 24.

[0088] In the embodiment, the light-emitting layer 23 can be made by an evaporation process in step S21. The electrodes can be formed by deposition, exposure, development, and etching in steps S31, S32, and S33. The display panel 100 prepared in the embodiment has a pixel structure 20 on the display panel 100, in which the anode electrode and the cathode electrode are "L" shaped electrodes, and the light-emitting layer 23 is coated by the "L" shaped electrodes, which increases the contact area of the light-emitting layer 23 and the electrodes, improves the light extraction efficiency, and effectively improves the luminous brightness. At the same time, each light-emitting layer 23 has only one side as a transparent electrode and the other three sides as reflective electrodes, so that the light of the light-emitting layer 23 can only be emitted through the side where the transparent electrode is located, which reduces the light loss, further improves the display brightness, effectively reduces the driving voltage of the sub-pixel unit 21, and thus improves the brightness of the display panel 100.

[0089] In the embodiment, the display device also includes a main board and the display panel 100 as described above. The main board is electrically connected to the display panel 100, and is configured to provide a driving signal to the display panel 100 to drive the display panel 100 to display a corresponding image. The display panel 100 can realize the transparent display function, has high display transparency, and has high display brightness.

[0090] The above is only an embodiment of the present application, and does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process conversion using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A pixel structure, characterized in that, It includes multiple sub-pixel units of different colors, and the multiple sub-pixel units are arranged to form a ring, with a transparent display area formed inside the ring; The sub-pixel unit includes a main light-emitting sub-unit and a reflective sub-unit arranged circumferentially along the ring shape; wherein, the main light-emitting sub-unit includes a first reflective electrode, a light-emitting layer and a first transparent electrode stacked sequentially along the direction toward the transparent display area for emitting light toward the transparent display area; the reflective sub-unit includes a second transparent electrode, a light-emitting layer and a second reflective electrode stacked sequentially along the direction toward the transparent display area, wherein the second reflective electrode is used to reflect light back into the transparent display area of ​​the adjacent pixel structure.

2. The pixel structure according to claim 1, characterized in that, In each sub-pixel unit, the main light-emitting sub-unit and the reflective sub-unit are arranged adjacent to each other; the main light-emitting sub-unit of each sub-pixel unit is arranged adjacent to the reflective sub-unit of the adjacent sub-pixel unit.

3. The pixel structure according to claim 1, characterized in that, The pixel structure includes three sub-pixel units of different colors, which are arranged to form a hexagonal ring.

4. The pixel structure according to any one of claims 1-3, characterized in that, Along the circumference of the transparent display area, the extension length of the main light-emitting subunit is greater than the extension length of the reflective subunit.

5. The pixel structure according to claim 4, characterized in that, The main light-emitting subunit of each sub-pixel unit is arranged parallel to the reflective subunit of the adjacent sub-pixel unit.

6. The pixel structure according to claim 1, characterized in that, Along a direction perpendicular to the pixel structure, the light-emitting layer includes opposing first and second surfaces; In the main light-emitting subunit, the first reflective electrode extends from the side of the light-emitting layer to the first surface, and the first reflective electrode covers the side of the light-emitting layer away from the transparent display area and the first surface; the main light-emitting subunit also includes a first reflective sub-electrode disposed on the second surface, the first reflective sub-electrode being electrically connected to the first transparent electrode to form a first anode electrode, the first anode electrode covering the side of the light-emitting layer near the transparent display area and the second surface; the first reflective electrode is insulated from the first anode electrode; In the reflective sub-unit, the second reflective electrode extends from the side of the light-emitting layer to the first surface, and the second reflective electrode covers the side of the light-emitting layer near the transparent display area and the first surface; the reflective sub-unit also includes a second reflective sub-electrode disposed on the second surface, the second reflective sub-electrode being electrically connected to the second transparent electrode to form a second anode electrode, the second anode electrode covering the side of the light-emitting layer near the transparent display area and the second surface; the second reflective electrode is insulated from the second anode electrode.

7. A display panel, characterized in that, include: Drive substrate; Multiple pixel structures as described in any one of claims 1-6 are disposed on the driving substrate and electrically connected to the driving substrate.

8. The display panel according to claim 7, characterized in that, The pixel structure includes three sub-pixel units of different colors, which are arranged to form a hexagonal ring; multiple pixel structures are spliced ​​together to form a honeycomb structure.

9. The display panel according to claim 8, characterized in that, Two adjacent pixel structures share the same pixel subunit on their closest sides; the shared pixel subunit serves as the main light-emitting subunit of one pixel structure and as the reflective subunit of the other pixel structure; or... The main light-emitting sub-unit of the pixel structure is arranged adjacent to the main light-emitting sub-unit of the adjacent pixel structure. The six reflective sub-units of each adjacent pixel structure are arranged to form a hexagon. A transparent sub-display area is formed inside the hexagon, and the reflective sub-unit emits light toward the transparent sub-display area.

10. A method for manufacturing a display panel, characterized in that, include: Fabrication of the driver substrate; Multiple light-emitting layers of different colors are fabricated on the driving substrate; Reflective electrodes and transparent electrodes are fabricated on two opposite sides of each light-emitting layer to form a main light-emitting subunit and a reflective subunit; In this configuration, each main light-emitting subunit and its corresponding reflective subunit constitute a subpixel unit. Multiple subpixel units of different colors are arranged in a ring, and a transparent display area is formed inside the ring. The transparent display area and the surrounding multiple subpixel units constitute a pixel structure. In each pixel structure, the transparent electrode of the main light-emitting subunit is located on the side closer to the transparent display area, so that the main light-emitting subunit emits light towards the transparent display area. The reflective electrode of the reflective subunit is located on the side closer to the transparent display area, so as to reflect light back into the transparent display area of ​​the adjacent pixel structure.

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