Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises a driving substrate, a light-emitting unit, a light conversion layer and a barrier wall structure which are stacked. The barrier wall structure comprises: a first isolation wall which is arranged in the same layer as the light conversion layer; a second isolation wall which is arranged on the side of the first isolation wall close to the driving substrate and is arranged in overlapping relation with the first isolation wall in the direction perpendicular to the driving substrate; and / or a third isolation wall which is arranged on the side of the first isolation wall away from the driving substrate and is arranged in overlapping relation with the first isolation wall in the direction perpendicular to the driving substrate. An included angle between the top surface of the first isolation wall away from the driving substrate and the side wall surface of the first isolation wall is an acute angle, forming a light converging part; or the second isolation wall covers the first isolation wall and extends out of the first isolation wall in the direction parallel to the light conversion layer, forming a light converging part. The display panel improves the cross-color problem between adjacent light conversion layers.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0002] Quantum dot light-emitting diodes (QLEDs), as a new generation of display technology, have promoted the development of QLED displays in the field of high-performance displays due to their advantages such as adjustable light-emitting size, ultra-high NTSC color gamut, good light source stability, and solution-based fabrication.

[0003] Currently, quantum dot color conversion technology (QD Color Conversion, QDCC) is available that enables full-color display. This technology uses a blue light-emitting diode (LED) as the excitation source to excite red and green quantum dots, converting blue light into red light and filtering the light. This achieves the RGB primary colors without the need for a colored green light film, thus enabling full-color display. As technological advancements place increasing demands on display technology, smaller, higher-resolution quantum dot display panels require even smaller sub-pixel sizes and more advanced quantum dot manufacturing techniques.

[0004] However, the current equipment is difficult to achieve the required precision, which can easily cause different colored quantum dots to overlap due to their close proximity and narrow barrier, resulting in color mixing and affecting the overall display effect of the display panel. Summary of the Invention

[0005] This application provides a display panel and display device, which aims to solve the problem in the prior art where the light emitted by quantum dots of different colors overlaps due to the close distance between them and the narrow barrier, resulting in color crosstalk.

[0006] To address the aforementioned technical problems, the first technical solution provided in this application is: to provide a display panel. The display panel includes:

[0007] Drive substrate;

[0008] The light-emitting unit is disposed on the driving substrate and electrically connected to the driving substrate;

[0009] A light conversion layer is disposed on the side of the light-emitting unit away from the driving substrate, corresponding to each light-emitting unit; along the direction perpendicular to the driving substrate, the orthogonal projection of the light conversion layer on the driving substrate covers the light-emitting unit;

[0010] A retaining wall structure is installed between adjacent light conversion layers;

[0011] The retaining wall structure includes:

[0012] The first isolation wall is installed on the same layer as the light conversion layer.

[0013] A second isolation wall is disposed on the side of the first isolation wall near the driving substrate, and overlaps the first isolation wall in a direction perpendicular to the driving substrate; and / or,

[0014] The third isolation wall is disposed on the side of the first isolation wall away from the driving substrate, and overlaps with the first isolation wall in a direction perpendicular to the driving substrate.

[0015] Wherein, the angle between the top surface of the first isolation wall away from the driving substrate and the side wall surface of the first isolation wall is an acute angle, forming a light-gathering part; or, the second isolation wall covers the first isolation wall and extends out of the first isolation wall in a direction parallel to the light conversion layer, forming a light-gathering part.

[0016] In some embodiments, the barrier structure includes a first isolation wall and a second isolation wall; the second isolation wall is disposed on the side of the first isolation wall near the driving substrate and surrounds the light-emitting unit; the space formed by the driving substrate, the barrier structure and the light conversion layer is filled with an encapsulation portion.

[0017] In some embodiments, the thickness of the light conversion layer is less than the thickness of the first isolation wall in the thickness direction of the light conversion layer, and the light conversion layer does not extend beyond the first isolation wall in the direction away from the driving substrate; adjacent light-emitting units share the same first isolation wall; the side of the first isolation wall near the driving substrate abuts against and completely overlaps the side of the second isolation wall away from the driving substrate.

[0018] In some embodiments, two second isolation walls are provided between adjacent light-emitting units, and the two second isolation walls are in contact on the side near the driving substrate; along the direction away from the driving substrate, the cross-sectional area of ​​the second isolation walls gradually decreases, so that there is a gap between adjacent second isolation walls, and the side of the first isolation wall near the driving substrate covers the gap.

[0019] In some embodiments, the barrier structure includes a first isolation wall and a third isolation wall; the third isolation wall is disposed on the side of the first isolation wall away from the driving substrate; the side of the third isolation wall close to the first isolation wall covers the top surface of the first isolation wall away from the driving substrate, and extends out of the first isolation wall in a direction parallel to the light conversion layer to form a light-gathering portion; in the thickness direction of the light conversion layer, the thickness of the light conversion layer is less than the thickness of the first isolation wall, and in the direction away from the driving substrate, the light conversion layer does not extend beyond the first isolation wall.

[0020] In some embodiments, the barrier structure further includes a second isolation wall, which is disposed between adjacent light-emitting units and surrounds the light-emitting units; the second isolation wall is located between the first isolation wall and the driving substrate and abuts against the first isolation wall, and the orthographic projection of the first isolation wall on the driving substrate and the orthographic projection of the third isolation wall on the driving substrate at least partially overlap.

[0021] In some embodiments, a light-shielding layer is further provided on the side surface of the driving substrate near the light conversion layer. The light-shielding layer has multiple cutouts to expose the light-emitting unit. The material of the light-shielding layer can be a light-absorbing insulating material or an insulating material with reflective properties.

[0022] In some embodiments, the display panel further includes a heat dissipation layer disposed on the side of the driving substrate away from the light conversion layer; the heat dissipation layer is made of graphene.

[0023] In some embodiments, the heat dissipation layer includes a plurality of heat dissipation sections, each corresponding to a light-emitting unit, and the orthogonal projection of the heat dissipation section onto the driving substrate covers the light-emitting unit.

[0024] To address the aforementioned technical problems, the second technical solution provided in this application is: to provide a display device. The display device includes:

[0025] The display panel is the display panel provided by the above technical solution;

[0026] The control circuit board is connected to the display panel and is used to control the display panel to display images.

[0027] The beneficial effects of this application are as follows: Unlike the prior art, this application provides a display panel and a display device. The display panel includes a driving substrate, a light-emitting unit, and a light conversion layer stacked together. A barrier structure is provided between adjacent light conversion layers to separate them. Specifically, the barrier structure includes a first isolation wall, a second isolation wall, and / or a second isolation wall stacked together. The first isolation wall is disposed on the same layer as the light conversion layer, and the second isolation wall is disposed on the side of the first isolation wall closer to the driving substrate. The orthographic projection of the first isolation wall on the driving substrate at least partially overlaps with the orthographic projection of the second isolation wall on the driving substrate. This increases the height of the barrier structure in the direction perpendicular to the driving substrate, allowing more space for the light-emitting area and the width of the first isolation wall to a certain extent, reducing the precision requirements of the device, and thus preventing color bleeding caused by overlapping of adjacent light conversion layers on their adjacent sides. Furthermore, by placing the second isolation wall on the side of the first isolation wall closer to the driving substrate, and setting the angle between the top surface of the first isolation wall away from the driving substrate and the sidewall of the first isolation wall to an acute angle, a light-converging portion is formed to block the edge region of the light conversion layer. This results in a convergence effect on the light emission angle of the light conversion layer, reducing the light emission angle and preventing the overlap of emission areas between adjacent light conversion layers, thereby further improving the color crosstalk problem between adjacent light conversion layers. By placing the third isolation wall on the side of the first isolation wall away from the driving substrate, covering the first isolation wall and extending outward from it in a direction parallel to the light conversion layer, a light-converging portion is formed to block the edge region of the light conversion layer. This also results in a convergence effect on the light emission angle of the light conversion layer, reducing the light emission angle and preventing the overlap of emission areas between adjacent light conversion layers, thereby further improving the color crosstalk problem between adjacent light conversion layers. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the display panel provided in the first embodiment of this application;

[0030] Figure 2 yes Figure 1 A schematic diagram of the structure of the first isolation wall and the light conversion layer provided in the embodiment;

[0031] Figure 3 This is a schematic diagram of the structure of the display panel provided in the second embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the structure of the display panel provided in the third embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the structure of the display panel provided in the fourth embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the structure of the display panel provided in the fifth embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the structure of the display panel provided in the sixth embodiment of this application;

[0036] Figure 8 yes Figure 7 A top view of the light-shielding layer provided in the embodiment;

[0037] Figure 9 This is a schematic diagram of the structure of the display panel provided in the seventh embodiment of this application;

[0038] Figure 10 This is a schematic diagram of the structure of the display panel provided in the eighth embodiment of this application;

[0039] Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0040] Figure label:

[0041] 100-Display panel; 10-Driver substrate; 11-Substrate; 12-Driver circuit layer; 13-Connection part; 20-Light-emitting unit; 21-Semiconductor layer; 22-Anode; 23-Cathode; 30-Light conversion layer; 31-First light conversion unit; 32-Second light conversion unit; 33-Third light conversion unit; 40-Barrier structure; 401-Light-gathering part; 41-First isolation wall; 411-Top surface; 412-Side wall surface; 413-Light conversion opening; 42-Second isolation wall; 421-Pixel opening; 43-Third isolation wall; 50-Encapsulation part; 51-First encapsulation layer; 52-Second encapsulation layer; 53-Third encapsulation layer; 60-Encapsulation substrate; 70-Light-shielding layer; 71-Knockout part; 80-Heat dissipation layer; 81-Heat dissipation part; 200-Control circuit board. Detailed Implementation

[0042] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0043] In the following description, specific details such as particular system architectures, interfaces, and technologies are presented for illustrative purposes rather than for limiting purposes, in order to provide a thorough understanding of this application.

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0045] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0046] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a display panel provided in the first embodiment of this application. In this embodiment, a display panel 100 is provided for displaying images. The display panel 100 includes a driving substrate 10, a light-emitting unit 20, a light conversion layer 30, and a barrier structure 40.

[0049] The driving substrate 10 includes a substrate 11, a driving circuit layer 12, and a connecting portion 13. The substrate 11 can be a rigid substrate or a flexible substrate. A rigid substrate can be, for example, a glass substrate or a single-crystal silicon substrate, while a flexible substrate can be, for example, a polyimide (PI) substrate, depending on the specific requirements. The driving circuit layer 12 is disposed on the substrate 11 and includes multiple pixel driving circuits (not shown) for driving the corresponding light-emitting units 20 to display corresponding brightness. The connecting portion 13 is disposed on the side of the driving circuit layer 12 away from the substrate 11 and is electrically connected to the pixel driving circuit. It is used for alignment and connection with the light-emitting units 20, so that the driving signals of the pixel driving circuits are transmitted to the light-emitting units 20 through the connecting portion 13.

[0050] The light-emitting unit 20 is disposed on the driving substrate 10 and electrically connected to the driving substrate 10. The light-emitting unit 20 includes a semiconductor layer 21, an anode 22, and a cathode 23, wherein the anode 22 and the cathode 23 are respectively aligned and electrically connected to the corresponding connection portion 13, for example, by alignment bonding. This allows the driving signal of the driving circuit layer 12 to be transmitted to the light-emitting unit 20 through the connection portion 13, thereby driving the light-emitting unit 20 to emit light of a corresponding brightness. In some embodiments, the light-emitting unit 20 may be a current-driven light-emitting device, such as a light-emitting diode (LED), a mini light-emitting diode (Mini-LED), a micro light-emitting diode (Micro-LED), or an organic light-emitting diode (OLED). Specifically, in this embodiment, the light-emitting unit 20 is a blue light-emitting device, that is, a light-emitting device that emits blue light, to cooperate with the light conversion layer 30 to achieve full-color display.

[0051] A light conversion layer 30 is disposed on the side of the light-emitting unit 20 away from the driving substrate 10, corresponding one-to-one with the light-emitting unit 20. Along a direction perpendicular to the driving substrate 10, the orthogonal projection of the light conversion layer 30 onto the driving substrate 10 covers the light-emitting unit 20. The light conversion layer 30 is used to convert the light emitted by the light-emitting unit 20 into light of a corresponding color. Specifically, the light conversion layer 30 includes a first light conversion unit 31, a second light conversion unit 32, and a third light conversion unit 33. The first light conversion unit 31 converts the emitted light from the light-emitting unit 20 into red light, the second light conversion unit 32 converts the emitted light from the light-emitting unit 20 into green light, and the third light conversion unit 33 converts the emitted light from the light-emitting unit 20 into blue light. In some embodiments, since the light-emitting unit 20 is a blue light-emitting device and its emitted light is blue light, the third light conversion unit 33 can also be a transparent unit. In a specific embodiment, the light conversion layer 30 can be a quantum dot layer to excite light of the corresponding color after receiving blue light. For example, the first light conversion unit 31 can be a red quantum dot layer to convert blue light into red light, the second light conversion unit 32 can be a green quantum dot layer to convert blue light into green light, and the third light conversion unit 33 can be a transparent unit or a blue quantum dot layer to emit blue light, thereby achieving full-color display. In a specific embodiment, multiple light conversion layers 30 of different colors can be arranged in an array according to the sub-pixel arrangement design.

[0052] A barrier structure 40 is disposed between adjacent light conversion layers 30 and surrounds the light conversion layers 30 to separate adjacent light conversion layers 30 and prevent color mixing between adjacent light conversion layers. In this embodiment, the barrier structure 40 includes a first isolation wall 41, a second isolation wall 42, and / or a third isolation wall 43 stacked together (see...). Figure 4 ).

[0053] The first isolation wall 41 is disposed on the same layer as the light conversion layer 30, and the orthographic projection of the first isolation wall 41 on the driving substrate 10 at least partially overlaps with the orthographic projection of the second isolation wall 42 on the driving substrate 10. This arrangement increases the height of the barrier structure 40 in the direction perpendicular to the driving substrate 10, allowing more space for the light-emitting area and the width of the first isolation wall 41, reducing the precision requirements of the equipment, and thus preventing color bleeding caused by overlapping of adjacent light conversion layers 30 on their closest sides.

[0054] Please refer to the following: Figure 1 and Figure 2 , Figure 2 yes Figure 1A schematic diagram of the structure of the first isolation wall and the light conversion layer provided in the embodiment. In this embodiment, the barrier structure 40 includes a first isolation wall 41 and a second isolation wall 42. The second isolation wall 42 is disposed on the side of the first isolation wall 41 near the driving substrate 10, and overlaps with the first isolation wall 41 in a direction perpendicular to the driving substrate 10. The angle β between the top surface 411 of the first isolation wall 41 away from the driving substrate 10 and the side wall surface 412 of the first isolation wall 41 is an acute angle, forming a light-gathering part 401.

[0055] That is, the second isolation wall 42 is disposed on the side of the first isolation wall 41 near the driving substrate 10, and is used to block the light from the corresponding light-emitting unit 20 from entering the area where the adjacent light-emitting unit 20 is located. By making the angle β between the top surface 411 of the first isolation wall 41 away from the driving substrate 10 and the side wall surface 412 of the first isolation wall 41 an acute angle, a light-converging part 401 is formed on the side of the first isolation wall 41 near the light conversion layer 30, which can block the edge area of ​​the light conversion layer 30, so that the side wall surface 412 of the light conversion layer 30 gradually tilts inward in the direction away from the driving substrate 10, thereby converging the light emission angle of the light conversion layer 30, reducing the light emission angle of the light conversion layer 30, and avoiding the problem of overlapping light emission areas between adjacent light conversion layers 30 above the barrier structure 40, thereby further improving the color crosstalk problem between adjacent light conversion layers 30. In a specific embodiment, the angle β between the top surface 411 and the side wall surface 412 of the first isolation wall 41 can range from 45° to 75°, and can be set according to the required light-gathering degree. Generally, the smaller the angle, the greater the light-gathering degree, and the larger the angle, the smaller the light-gathering degree. In a specific embodiment, the angle β between the top surface 411 and the side wall surface 412 of the first isolation wall 41 can be, for example, 45°, 50°, 60°, 65°, 70°, or 75°, and can be set according to actual needs. It should be noted that in this embodiment, the top surface 411 of the first isolation wall 41 refers to the surface of the first isolation wall 41 away from the driving substrate 10, and the side wall surface 412 of the first isolation wall 41 refers to the surface of the first isolation wall 41 close to the light conversion layer 30.

[0056] In this embodiment, the second isolation wall 42 is disposed on the side of the first isolation wall 41 near the driving substrate 10 and surrounds the light-emitting unit 20 to isolate adjacent light-emitting units 20 and block the light from the light-emitting unit 20 from entering the area of ​​the adjacent light-emitting unit 20. Specifically, in the thickness direction of the light conversion layer 30, the thickness of the light conversion layer 30 is less than the thickness of the first isolation wall 41, and in the direction away from the driving substrate 10, the light conversion layer 30 does not extend beyond the first isolation wall 41; that is, the thickness of the light conversion layer 30 is less than the thickness of the first isolation wall 41 in the direction perpendicular to the light conversion layer, and the light conversion layer 30 does not extend beyond the first isolation wall 41 on the side of the emitted light direction, thereby avoiding overlap between adjacent light conversion layers 30. Further, in the direction near the driving substrate 10, the light conversion layer 30 also does not extend beyond the first isolation wall 41, thereby avoiding overlap between adjacent light conversion layers 30 on the side near the driving substrate 10.

[0057] Furthermore, the height of the surface of the second partition wall 42 away from the driving substrate 10 is greater than the height of the surface of the light-emitting unit 20 away from the driving substrate 10. This arrangement facilitates the top-down configuration of the first partition wall 41 and the second partition wall 42, meaning that the side of the first partition wall 41 closest to the driving substrate 10 and the side of the second partition wall 42 away from the driving substrate 10 abut and completely overlap, thereby preventing light leakage at the position between the first partition wall 41 and the second partition wall 42.

[0058] Furthermore, adjacent light-emitting units 20 share the same first isolation wall 41. That is, a first isolation wall 41 is set between adjacent light-emitting units 20 to simplify the barrier structure 40. In a specific embodiment, the first isolation wall 41 and the second isolation wall 42 are basically the same in shape and size. The first isolation wall 41 and the second isolation wall 42 can be made using the same photomask, which avoids the additional cost of the photomask. Specifically, the angle β between the top surface 411 and the side wall surface 412 of the first isolation wall 41 can be adjusted by adjusting the exposure dose to change the propagation path of the emitted light, reduce the overlap of light after passing through the light conversion layer 30, and thus improve the color crosstalk phenomenon.

[0059] In this embodiment, the display panel 100 may further include an encapsulation portion 50, which fills the space formed by the driving substrate 10, the barrier structure 40, and the light conversion layer 30. In one embodiment, the display panel 100 may further include an encapsulation substrate 60, which is disposed on the side of the light conversion layer 30 away from the driving substrate 10.

[0060] In fabricating the barrier structure 40 and the light conversion layer 30, the first barrier 41 is formed on the packaging substrate 60 through exposure, development, and etching using a mask. The first barrier 41 has multiple light conversion openings 413. Then, light conversion layers 30 of different colors are formed sequentially in the corresponding light conversion openings 413. The first packaging layer 51 is then filled into the light conversion openings 413 to encapsulate the light conversion layer 30, thereby blocking water and oxygen and preventing corrosion of the light conversion layer 30. This also makes the side of the packaging substrate 60 closest to the driving substrate 10 flatter. The second barrier... The second barrier wall 42 is formed on the driving substrate 10 through exposure, development, and etching using the same mask. The second barrier wall 42 also has multiple pixel openings 421 corresponding one-to-one with the light conversion openings 413. Each pixel opening 421 contains a light-emitting unit 20. A second encapsulation layer 52 is then filled into the pixel opening 421 to encapsulate the light-emitting unit 20, blocking water and oxygen and preventing corrosion. This also makes the side of the driving substrate 10 closest to the encapsulation substrate 60 flatter, which is beneficial for the assembly of the substrates on both sides and for light propagation. Simultaneously, the first encapsulation layer 51 and the second encapsulation layer 52 can also be fabricated using the same mask as the barrier structure 40. The difference is that the first encapsulation layer 51 and the second encapsulation layer 52 can be made using negative photoresist, while the first barrier wall 41 and the second barrier wall 42 can be made using positive photoresist, or vice versa. This arrangement allows for multiple exposures using the same mask to achieve different structural designs without increasing mask costs.

[0061] In another embodiment, a second isolation wall 42 and a second encapsulation layer 52 can be sequentially fabricated on the driving substrate 10 first; then a first isolation wall 41, a first encapsulation layer 51, and a light conversion layer 30 can be sequentially fabricated on the second encapsulation layer 52; finally, a third encapsulation layer 53 can be fabricated on the light conversion layer 30, or an encapsulation cover plate can be provided on the light conversion layer 30, depending on actual needs. Each encapsulation layer can be an organic encapsulation layer and / or an inorganic encapsulation layer, or multiple layers of stacked inorganic and organic encapsulation layers, depending on actual needs. In this embodiment, by directly fabricating the first isolation wall 41, the first encapsulation layer 51, and the light conversion layer 30 on the second encapsulation layer 52, the problem of misalignment during the packaging and assembly of the upper and lower substrates can also be avoided.

[0062] Please see Figure 3 , Figure 3This is a schematic diagram of the display panel structure provided in the second embodiment of this application. In this embodiment, the barrier structure 40 includes a first isolation wall 41 and a second isolation wall 42. The second isolation wall 42 is disposed on the side of the first isolation wall 41 near the driving substrate 10. Two second isolation walls 42 are disposed between adjacent light-emitting units 20, and the two second isolation walls 42 are in contact on the side near the driving substrate 10. Along the direction away from the driving substrate 10, the cross-sectional area of ​​the second isolation wall 42 gradually decreases, so that there is a gap between adjacent second isolation walls 42, and the side of the first isolation wall 41 near the driving substrate 10 covers the gap.

[0063] Specifically, the second isolation wall 42 is located between the driving substrate 10 and the first isolation wall 41, and two second isolation walls 42 are provided between adjacent light-emitting units 20, that is, there are two second isolation walls 42 between adjacent light-emitting units 20. This arrangement reduces the space size of the pixel opening 421, but does not change the opening area of ​​the light conversion opening 413. Without affecting the aperture ratio, it can reduce the diffuse reflection of the light-emitting unit 20 in the surrounding area and downward in the pixel opening 421, thereby reducing the light intensity of the adjacent light-emitting unit 20 area after the light from the light-emitting unit 20 is reflected by the bottom of the driving substrate 10. This improves the phenomenon of uneven color when displaying certain low gray pure color images, and improves color saturation and display contrast.

[0064] In this embodiment, the thickness of the light conversion layer 30 is substantially the same as, or slightly less than, the thickness of the first isolation wall 41 in the direction perpendicular to the light conversion layer 30, to avoid overlap between adjacent light conversion layers 30. Furthermore, the encapsulation portion 50 may only include the first encapsulation layer 51, which encapsulates the light-emitting unit 20 and the corresponding light conversion layer 30. Through the above-described configuration, this embodiment reduces the thickness of the display panel 100, facilitating a thinner and lighter design. It also further reduces diffuse reflection of the light-emitting unit 20 within the pixel opening 421, thereby mitigating the problem of light from the light-emitting unit 20 affecting the luminous intensity of adjacent light-emitting unit 20 areas after reflection from the bottom of the driving substrate 10. It should be noted that the thickness of the light conversion layer 30 in this embodiment refers to the thickness of the light conversion layer 30 in the direction perpendicular to the driving substrate 10.

[0065] Please see Figure 4 , Figure 4This is a schematic diagram of the display panel structure provided in the third embodiment of this application. In this embodiment, the barrier structure 40 includes a first isolation wall 41 and a third isolation wall 43. The third isolation wall 43 is disposed on the side of the first isolation wall 41 away from the driving substrate 10, and overlaps with the first isolation wall 41 in a direction perpendicular to the driving substrate 10. The third isolation wall 43 covers the first isolation wall 41 and extends out of the first isolation wall 41 in a direction parallel to the light conversion layer 30, forming a light-gathering portion 401.

[0066] Specifically, the side of the third isolation wall 42 close to the first isolation wall 41 covers the top surface 411 of the first isolation wall 41 away from the driving substrate 10, and extends out of the first isolation wall 41 in a direction parallel to the light conversion layer 30 to form a light-gathering portion 401; in the thickness direction of the light conversion layer 30, the thickness of the light conversion layer 30 is less than the thickness of the first isolation wall 41, and in the direction away from the driving substrate 10, the light conversion layer 30 does not extend beyond the first isolation wall 41.

[0067] Specifically, a first encapsulation layer 51 is also provided on the driving substrate 10. The first encapsulation layer 51 is used to encapsulate and planarize the light-emitting unit 20, preventing the light-emitting unit 20 from being corroded by water and oxygen, and making the side of the light-emitting unit 20 away from the driving substrate 10 planarized. A first isolation wall 41 is disposed on the first encapsulation layer 51, and after patterning, a plurality of the aforementioned light conversion openings 413 are formed. The light conversion layer 30 is disposed in the light conversion opening 413, and the thickness of the light conversion layer 30 does not exceed the depth of the light conversion opening 413 in the direction perpendicular to the driving substrate 10, that is, the light conversion layer 30 does not exceed the light conversion opening 413, thereby avoiding the problem of overlap between adjacent light conversion layers. Then, a third isolation wall 43 is stacked on the side of the first isolation wall 41 away from the driving substrate 10, so that the side of the third isolation wall 43 close to the first isolation wall 41 covers the top surface 411 of the first isolation wall 41, and extends out of the first isolation wall 41 in a direction parallel to the light conversion layer 30 to form a light-gathering part 401, thereby converging the emitted light of the light conversion layer 30 and improving the problem of color crosstalk caused by the overlap of emitted light from adjacent light conversion layers 30.

[0068] Specifically, in this embodiment, the cross-sections of the first isolation wall 41 and the third isolation wall 43 in the direction perpendicular to the driving substrate 10 can both be trapezoidal, so that the side of the third isolation wall 42 closest to the first isolation wall 41 covers the top surface 411 of the first isolation wall 41 and extends beyond the first isolation wall 41 to form the light-gathering part 401. The first isolation wall 41 and the third isolation wall 43 can be fabricated using the same photomask, and the sizes of the first isolation wall 41 and the third isolation wall 43 can be slightly different, which can be set according to actual needs. During fabrication, the sizes of the first isolation wall 41 and the third isolation wall 43 can be slightly different by changing the fabrication parameters such as exposure parameters.

[0069] Furthermore, a second encapsulation layer 52 is filled into the opening formed by the third isolation wall 43 to encapsulate and planarize the light conversion layer 30. An encapsulation substrate 60 or a third encapsulation layer 53 may also be disposed on the side of the second encapsulation layer 52 away from the driving substrate 10. Specifically, the materials and structures of the first encapsulation layer 51, the second encapsulation layer 52, and the third encapsulation layer 53 may be the same as those involved in the above embodiments.

[0070] Please see Figure 5 , Figure 5 This is a schematic diagram of the display panel structure provided in the fourth embodiment of this application. Further, in this embodiment, the barrier structure 40 includes a first isolation wall 41, a second isolation wall 42, and a third isolation wall 43. The second isolation wall 42 is disposed between adjacent light-emitting units 20 and surrounds the light-emitting units 20; the second isolation wall 42 is located between the first isolation wall 41 and the driving substrate 10 and abuts against the first isolation wall 41, and the orthographic projection of the first isolation wall 41 on the driving substrate 10 at least partially overlaps with the orthographic projection of the second isolation wall 42 on the driving substrate 10.

[0071] By setting a second isolation wall 42 between the driving substrate 10 and the first isolation wall 41, and making the second isolation wall 42 surround the light-emitting unit 20, the adjacent light-emitting units 20 are separated to block the light of the light-emitting unit 20 and prevent the light of the light-emitting unit 20 from entering the area of ​​the adjacent light-emitting unit 20, thus affecting the brightness display.

[0072] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of the display panel provided in the fifth embodiment of this application. Figure 5 Unlike the previous embodiment, in this embodiment, a double second isolation wall 42 is provided between adjacent light-emitting units 20. Figure 3 Similarly, by setting up double second isolation walls 42 between adjacent light-emitting units 20, the spatial size of the pixel opening 421 is reduced, but the opening area of ​​the light conversion opening 413 is not changed. This reduces the diffuse reflection of the light-emitting unit 20 to the surroundings and downwards within the pixel opening 421 without affecting the aperture ratio. This reduces the impact of light reflected from the light-emitting unit 20 to the surroundings and downwards on the luminous intensity of the adjacent light-emitting unit 20 area after being reflected by the bottom of the driving substrate 10. This improves the uneven color display phenomenon when displaying certain low grayscale pure color images and enhances color saturation and display contrast.

[0073] Please see Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of the structure of the display panel provided in the sixth embodiment of this application. Figure 8 yes Figure 6A top view of the light-shielding layer provided in the embodiment. Further, in this embodiment, a light-shielding layer 70 is also provided on the side surface of the driving substrate 10 near the light conversion layer 30. The light-shielding layer 70 has a plurality of cutouts 71 to expose the light-emitting unit 20. The material of the light-shielding layer 70 can be a light-absorbing insulating material or an insulating material with reflective properties.

[0074] Specifically, the light-shielding layer 70 is disposed on the exposed surface of the driving substrate 10 near the light conversion layer 30, and has multiple cutouts 71 to provide space for the light-emitting unit 20. By providing the light-shielding layer 70 on the driving substrate 10, the light from the light-emitting unit 20 is blocked, preventing the light from the light emitting unit 20 from entering the bottom of the driving substrate 10 and being reflected into the area of ​​adjacent light-emitting units 20. This addresses the bottom reflection problem of the light-emitting unit 20, avoiding affecting the display brightness of adjacent light-emitting unit 20 areas and improving the color uniformity phenomenon when displaying certain low grayscale pure color images. In one embodiment, the material of the light-shielding layer 70 can be a light-absorbing insulating material, such as the same material as the isolation wall, to block light. In another embodiment, the material of the light-shielding layer 70 can also be an insulating material with reflective properties, which can reflect light while blocking it, thereby improving the luminous efficiency of the light-emitting unit 20 and increasing the display brightness.

[0075] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of the display panel provided in the seventh embodiment of this application. In this embodiment, the display panel 100 further includes a heat dissipation layer 80, which is disposed on the side of the driving substrate 10 away from the light conversion layer 30; the material of the heat dissipation layer 80 is graphene.

[0076] Specifically, a heat dissipation layer 80 can be coated on the side of the driving substrate 10 away from the driving substrate 10, so that the heat generated by the driving substrate 10, the light-emitting unit 20, and the light conversion layer 30 can be conducted and dissipated in a timely manner, thereby preventing heat accumulation that would reduce the lifespan of the light conversion layer 30 and the light-emitting unit 20. Furthermore, the heat dissipation layer 80 can also "blacken" the side of the driving substrate 10 away from the light-emitting unit 20, thereby further preventing light reflection from affecting the display brightness of adjacent light-emitting unit 20 areas. Furthermore, due to the insulating properties of graphene material, the heat dissipation layer 80 can also effectively prevent electrostatic breakdown caused by static electricity accumulation.

[0077] Please see Figure 10 , Figure 10 This is a schematic diagram of the structure of the display panel provided in the eighth embodiment of this application. Figure 9Unlike the previous embodiment, in this embodiment, the heat dissipation layer 80 includes a plurality of heat dissipation parts 81, each of which corresponds to a light-emitting unit 20, and the orthogonal projection of the heat dissipation part 81 on the driving substrate 10 covers the light-emitting unit 20.

[0078] Specifically, the shape and size of the heat dissipation portion 81 can be the same as the shape and size of the cutout portion 71 of the light-shielding layer 70. This allows the same photomask used to fabricate the light-shielding layer 70 to be used for vapor deposition, forming multiple heat dissipation portions 81 and saving on photomask costs. Furthermore, by including multiple cutout portions 71 in the heat dissipation layer 80 instead of coating the entire surface, the amount of graphene material used can be reduced, lowering manufacturing costs. Similarly, when fabricating the heat dissipation layer 80 using the same photomask, the photoresist polarity of the material in the heat dissipation layer 80 needs to be opposite to that of the material in the light-shielding layer 70.

[0079] Please see Figure 11 , Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. In this embodiment, a display device is provided, comprising a display panel 100 and a control circuit board 200. The display panel 100 is the same as the one provided in the above embodiments. The control circuit board 200 is electrically connected to the display panel 100, specifically electrically connected to the driving substrate 10, and is used to control the display panel 100 so that the display panel 100 displays corresponding images according to a corresponding control method.

[0080] This display device can effectively improve the problem of overlapping light-emitting areas caused by the light being too close to the light conversion layers 30 of different colors and the narrow barrier, thereby improving the color mixing problem.

[0081] The above are merely embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A display panel, comprising: a driving substrate; a light emitting unit disposed on the driving substrate and electrically connected to the driving substrate; a light conversion layer disposed on a side of the light emitting unit away from the driving substrate and corresponding to the light emitting unit one by one; a normal projection of the light conversion layer on the driving substrate in a direction perpendicular to the driving substrate covers the light emitting unit; a barrier structure disposed between adjacent light conversion layers; characterized in that the barrier structure comprises: a first isolation wall disposed in the same layer as the light conversion layer; a second isolation wall disposed on a side of the first isolation wall close to the driving substrate and overlapping the first isolation wall in a direction perpendicular to the driving substrate; two second isolation walls are disposed between adjacent light emitting units, and the two second isolation walls contact on a side close to the driving substrate; the cross-sectional area of the second isolation wall gradually decreases in a direction away from the driving substrate, so that there is a gap between adjacent second isolation walls, and the gap is covered by the side of the first isolation wall close to the driving substrate; and / or a third isolation wall disposed on a side of the first isolation wall away from the driving substrate and overlapping the first isolation wall in a direction perpendicular to the driving substrate; wherein an included angle between a top surface of the first isolation wall away from the driving substrate and a side wall surface of the first isolation wall is an acute angle, forming a light converging portion; or the third isolation wall covers the first isolation wall and extends out of the first isolation wall in a direction parallel to the light conversion layer, forming a light converging portion.

2. The display panel of claim 1, wherein, The barrier structure comprises the first isolation wall and the second isolation wall; the second isolation wall is disposed on a side of the first isolation wall close to the driving substrate and surrounds the light emitting unit; the driving substrate, the barrier structure and the light conversion layer surround a space filled with an encapsulation portion.

3. The display panel of claim 2, wherein, In a thickness direction of the light conversion layer, the thickness of the light conversion layer is less than the thickness of the first isolation wall, and the light conversion layer does not exceed the first isolation wall in a direction away from the driving substrate; adjacent light emitting units share the same first isolation wall; the side of the first isolation wall close to the driving substrate abuts against and completely overlaps the side of the second isolation wall away from the driving substrate.

4. The display panel of claim 1, wherein, The barrier structure comprises the first isolation wall and the third isolation wall; the side of the third isolation wall close to the first isolation wall covers the top surface of the first isolation wall away from the driving substrate, and extends out of the first isolation wall in a direction parallel to the light conversion layer, forming the light converging portion; in the thickness direction of the light conversion layer, the thickness of the light conversion layer is less than the thickness of the first isolation wall, and the light conversion layer does not exceed the first isolation wall in a direction away from the driving substrate.

5. The display panel of claim 4, wherein, The retaining wall structure further comprises a second partition wall, which is arranged between adjacent light emitting units and surrounds the light emitting units; the second partition wall is located between the first partition wall and the driving substrate and abuts against the first partition wall, and a normal projection of the first partition wall on the driving substrate at least partially overlaps a normal projection of the third partition wall on the driving substrate.

6. The display panel of claim 1, wherein, The side surface of the driving substrate close to the light conversion layer is further provided with a light shielding layer, the light shielding layer has a plurality of hollow parts to expose the light emitting units; the material of the light shielding layer is light-absorbing insulating material or insulating material with reflection characteristics.

7. The display panel of claim 1, wherein, The display panel further comprises a heat dissipation layer, which is arranged on the side of the driving substrate away from the light conversion layer; the material of the heat dissipation layer is graphene material.

8. The display panel of claim 7, wherein, The heat dissipation layer comprises a plurality of heat dissipation parts, the heat dissipation parts correspond to the light emitting units one by one, and the normal projection of the heat dissipation part on the driving substrate covers the light emitting unit.

9. A display device comprising: Comprise: The display panel is the display panel as claimed in any one of claims 1-8; The control circuit board is connected with the display panel and is used for controlling the display panel to display images.

Images