Display panel and display device

Abstract

The invention 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 retaining wall structure which are stacked. The retaining wall structure comprises a first separating wall which is arranged on the same layer as the light conversion layer; the second isolation wall is arranged on the side, close to the driving substrate, of the first isolation wall, and the second isolation wall and the first isolation wall are overlapped in the direction perpendicular to the driving substrate; and / or the third isolation wall is arranged on the side, away from the driving substrate, of the first isolation wall, and the third isolation wall and the first isolation wall are overlapped in the direction perpendicular to the driving substrate. The included angle between the top face, away from the driving substrate, of the first isolation wall and the side wall face of the first isolation wall is an acute angle, and a light arresting part is formed. Or, the second isolation wall covers the first isolation wall and extends out of the first isolation wall along the direction parallel to the light conversion layer to form a light arresting part. The display panel improves the cross color problem between adjacent light conversion layers.

Description

Technical Field

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

[0002] Quantum dot light emitting diodes (QLED) are a new generation of display technology. They have the advantages of adjustable light emitting size, ultra-high NTSC color gamut, good light source stability, and solution preparation, which have promoted the development of QLED displays in the field of high-performance displays.

[0003] At present, there is a quantum dot color conversion technology (QD Color Conversion, QDCC) that can achieve full color, that is, blue light emitting diodes (LED) are used as excitation light sources to excite red and green quantum dots, converting blue light into red light and filtering light, and realizing RGB primary colors without the use of colored green light film, thereby achieving full color display. As the requirements for display technology continue to increase with the development of science and technology, smaller size and higher resolution quantum dot display panels need to be matched with smaller sub-pixel sizes and more advanced quantum dot production technology.

[0004] However, the current equipment accuracy is difficult to meet the requirements, and it is very easy for quantum dots of different colors to overlap in the light-emitting areas due to the close distance and narrow barrier walls, resulting in cross-color phenomenon, which affects the overall display effect of the display panel. Summary of the invention

[0005] The present application provides a display panel and a display device, aiming to solve the problem in the prior art that the distance between quantum dots of different colors is too close and the blocking wall is narrow, resulting in overlapping light-emitting areas of light passing through quantum dots, and then the problem of cross-color phenomenon.

[0006] In order to solve the above technical problems, the first technical solution provided by the present application is to provide a display panel. The display panel includes:

[0007] Driver substrate;

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

[0009] The light conversion layer is arranged on a side of the light emitting unit away from the driving substrate, and corresponds to the light emitting unit one by one; along a direction perpendicular to the driving substrate, the orthographic projection of the light conversion layer on the driving substrate covers the light emitting unit;

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

[0011] The retaining wall structure includes:

[0012] A first isolation wall, which is disposed on the same layer as the light conversion layer;

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

[0014] a third isolation wall, arranged on a side of the first isolation wall away from the driving substrate, and overlapping with the first isolation wall in a direction perpendicular to the driving substrate;

[0015] Among them, 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 portion; 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 portion.

[0016] In some embodiments, the retaining wall structure includes a first isolation wall and a second isolation wall; the second isolation wall is arranged on a side of the first isolation wall close to the driving substrate and surrounds the light-emitting unit; the packaging part is filled in the space formed by the driving substrate, the retaining wall structure and the light conversion layer.

[0017] In some embodiments, 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 exceed the first isolation wall; adjacent light-emitting units share the same first isolation wall; and the side of the first isolation wall close to the driving substrate abuts and completely overlaps with the side of the second isolation wall away from the driving substrate.

[0018] In some embodiments, two second isolation walls are arranged between adjacent light-emitting units, and the two second isolation walls are in contact on the side close to 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 gap is covered on the side of the first isolation wall close to the driving substrate.

[0019] In some embodiments, the retaining wall structure includes a first isolation wall and a third isolation wall; the third isolation wall is arranged 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 collecting 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 exceed the first isolation wall.

[0020] In some embodiments, the retaining wall structure also includes a second isolation wall, which is arranged 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 at least partially overlaps with the orthographic projection of the third isolation wall on the driving substrate.

[0021] In some embodiments, a light shielding layer is further provided on a surface of the driving substrate close to the light conversion layer. The light shielding layer has multiple hollow portions to expose the light-emitting units. 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, which is disposed on a side of the driving substrate away from the light conversion layer; the material of the heat dissipation layer is graphene material.

[0023] In some embodiments, the heat dissipation layer includes a plurality of heat dissipation parts, the heat dissipation parts correspond to the light emitting units one by one, and the orthographic projections of the heat dissipation parts on the driving substrate cover the light emitting units.

[0024] In order to solve the above technical problem, the second technical solution provided by the present 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] Beneficial effects of the present application: Different from the prior art, the present application provides a display panel and a display device. The display panel includes a stacked driving substrate, a light-emitting unit and a light conversion layer. Among them, a retaining wall structure is also arranged between adjacent light conversion layers to separate adjacent light conversion layers. Specifically, the retaining wall structure includes a first isolation wall, a second isolation wall and / or a second isolation wall that are stacked. The first isolation wall is arranged on the same layer as the light conversion layer, the second isolation wall is arranged on the side of the first isolation wall close to the driving substrate, and the orthographic projection of the first isolation wall on the driving substrate overlaps with the orthographic projection of the second isolation wall on the driving substrate at least partially, thereby increasing the height of the retaining wall structure in the direction perpendicular to the driving substrate, and being able to leave more space for the light-emitting area and the width of the first isolation wall to a certain extent, reducing the requirements for equipment accuracy, thereby preventing adjacent light conversion layers from overlapping on the side close to each other to cause cross-color problems. Furthermore, by setting the second isolation wall on the side of the first isolation wall close to the driving substrate, and the angle between the top surface of the first isolation wall away from the driving substrate and the side wall of the first isolation wall is an acute angle, a light-gathering portion is formed to block the edge area of ​​the light conversion layer, thereby having a convergent effect on the light output angle of the light conversion layer, reducing the light output angle of the light conversion layer, avoiding the problem of overlapping light output areas between adjacent light conversion layers, and further improving the color crossover problem between adjacent light conversion layers. By setting the third isolation wall on the side of the first isolation wall away from the driving substrate, 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, a light-gathering portion is formed to block the edge area of ​​the light conversion layer, thereby having a convergent effect on the light output angle of the light conversion layer, reducing the light output angle of the light conversion layer, avoiding the problem of overlapping light output areas between adjacent light conversion layers, and further improving the color crossover problem between adjacent light conversion layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 is a schematic structural diagram of a display panel provided in the first embodiment of the present application;

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

[0031] Figure 3 is a schematic structural diagram of a display panel provided in a second embodiment of the present application;

[0032] Figure 4 is a schematic structural diagram of a display panel provided in a third embodiment of the present application;

[0033] Figure 5 is a schematic structural diagram of a display panel provided in a fourth embodiment of the present application;

[0034] Figure 6 is a schematic structural diagram of a display panel provided in a fifth embodiment of the present application;

[0035] Figure 7 is a schematic structural diagram of a display panel provided in a sixth embodiment of the present application;

[0036] Figure 8 yes Figure 7 A schematic diagram of a top view of the light shielding layer provided in an embodiment;

[0037] Fig. 9 is a schematic structural diagram of a display panel provided in a seventh embodiment of the present application;

[0038] Fig.10 is a schematic structural diagram of a display panel provided in an eighth embodiment of the present application;

[0039] Fig.11 It is a schematic diagram of the structure of a display device provided in one embodiment of the present application.

[0040] Reference numerals:

[0041] 100-display panel; 10-driving substrate; 11-substrate; 12-driving circuit layer; 13-connecting 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-blocking wall 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-packaging part; 51-first packaging layer; 52-second packaging layer; 53-third packaging layer; 60-packaging substrate; 70-light-shielding layer; 71-hollow part; 80-heat dissipation layer; 81-heat dissipation part; 200-control circuit board. DETAILED DESCRIPTION

[0042] The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0043] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0046] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0048] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of a display panel provided in the first embodiment of the present application. In this embodiment, a display panel 100 is provided for displaying an image. The display panel 100 includes a driving substrate 10, a light emitting unit 20, a light conversion layer 30 and a retaining wall structure 40.

[0049] The driving substrate 10 includes a substrate 11, a driving circuit layer 12 and a connecting portion 13. The substrate 11 may be a hard substrate or a flexible substrate. The hard substrate may be, for example, a glass substrate, a single crystal silicon substrate, etc. The flexible substrate may be, for example, a polyimide (PI) substrate, etc., which may be selected according to actual needs. The driving circuit layer 12 is disposed on the substrate 11, and includes a plurality of pixel driving circuits (not shown) for driving the corresponding light-emitting unit 20 to display corresponding brightness. The connecting portion 13 is disposed on a side of the driving circuit layer 12 away from the substrate 11, and is electrically connected to the pixel driving circuit, and is used to be aligned with the light-emitting unit 20 so that the driving signal of the pixel driving circuit is transmitted to the light-emitting unit 20 through the connecting portion 13.

[0050] The light-emitting unit 20 is disposed on the driving substrate 10 and is 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 arranged in alignment with the corresponding connecting portion 13 and electrically connected, for example, the electrical connection can be achieved by alignment bonding. Thus, the driving signal of the driving circuit layer 12 can be transmitted to the light-emitting unit 20 through the connecting portion 13, thereby driving the light-emitting unit 20 to emit light of corresponding brightness. In some embodiments, the light-emitting unit 20 can be a current-driven light-emitting device, such as a light-emitting diode (Light Emitting Diode, LED), a sub-millimeter light-emitting diode (Mini Light Emitting Diode, Mini-LED), a micro light-emitting diode (Micro Light Emitting Diode, Micro-LED), and an organic light-emitting diode (Organic Light Emitting Diode, OLED). Specifically, in the embodiment of the present application, the light-emitting unit 20 is a blue light-emitting device, that is, a light-emitting device that emits blue light, so as to cooperate with the light conversion layer 30 to achieve full-color display.

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

[0052] The retaining wall 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 crosstalk between adjacent light conversion layers. In the embodiment of the present application, the retaining wall structure 40 includes a first isolation wall 41, a second isolation wall 42 and / or a third isolation wall 43 (see FIG. Figure 4 ).

[0053] The first isolation wall 41 is arranged at the same layer as the light conversion layer 30, and the orthographic projection of the first isolation wall 41 on the driving substrate 10 overlaps at least partially with the orthographic projection of the second isolation wall 42 on the driving substrate 10. Through the above arrangement, the height of the retaining wall structure 40 in the direction perpendicular to the driving substrate 10 is increased, which can leave more space for the light-emitting area and the width of the first isolation wall 41 to a certain extent, and reduce the requirements for equipment accuracy, thereby preventing the overlap of adjacent light conversion layers 30 on the side close to each other to cause cross-color problems.

[0054] Please refer to 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 the present embodiment, the retaining wall structure 40 includes a first isolation wall 41 and a second isolation wall 42. The second isolation wall 42 is arranged on a side of the first isolation wall 41 close to the drive substrate 10, and overlaps with the first isolation wall 41 in a direction perpendicular to the drive substrate 10. The angle β between the top surface 411 of the first isolation wall 41 away from the drive substrate 10 and the side wall surface 412 of the first isolation wall 41 is an acute angle, forming a light-collecting portion 401.

[0055] That is, the second isolation wall 42 is arranged on the side of the first isolation wall 41 close to the driving substrate 10, and is used to block the light of 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 portion 401 is formed on the side of the first isolation wall 41 close to the light conversion layer 30, and the edge area of ​​the light conversion layer 30 can be shielded, so that the side wall surface 412 of the light conversion layer 30 gradually tilts inward along the direction away from the driving substrate 10, thereby having a convergence effect on the light output angle of the light conversion layer 30, reducing the light output angle of the light conversion layer 30, and avoiding the problem of overlapping light output areas between adjacent light conversion layers 30 above the retaining wall structure 40, thereby further improving the color crossover problem between adjacent light conversion layers 30. In a specific embodiment, the angle β between the top surface 411 of the first isolation wall 41 and its side wall surface 412 may range from 45° to 75°, and may be specifically set according to the required light convergence degree. Generally, the smaller the angle, the greater the light convergence degree, and the larger the angle, the smaller the light convergence degree. In a specific embodiment, the angle β between the top surface 411 of the first isolation wall 41 and its side wall surface 412 may be, for example, 45°, 50°, 60°, 65°, 70°, or 75°, and may be specifically set according to actual needs. It should be noted that in the embodiment of the present application, the top surface 411 of the first isolation wall 41 refers to the surface of the first isolation wall 41 on the side away from the drive substrate 10, and the side wall surface 412 of the first isolation wall 41 refers to the surface of the first isolation wall 41 on the side close to the light conversion layer 30.

[0056] In this embodiment, the second isolation wall 42 is disposed on a side of the first isolation wall 41 close to the driving substrate 10, and surrounds the light-emitting unit 20, so as to isolate adjacent light-emitting units 20 and block the light of the light-emitting unit 20 from entering the adjacent light-emitting unit 20 area. 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 the light conversion layer 30 does not exceed the first isolation wall 41 in the direction away from the driving substrate 10; 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 exceed the first isolation wall 41 on one side of the light emitting direction, thereby avoiding overlapping between adjacent light conversion layers 30. Further, in the direction close to the driving substrate 10, the light conversion layer 30 does not exceed the first isolation wall 41, thereby avoiding overlapping between adjacent light conversion layers 30 on the side close to the driving substrate 10.

[0057] Furthermore, the height from the side surface of the second isolation wall 42 away from the driving substrate 10 to the driving substrate 10 is greater than the height from the side surface of the light-emitting unit 20 away from the driving substrate 10 to the driving substrate 10. Such a configuration is conducive to the configuration of the top structure of the first isolation wall 41 and the second isolation wall 42, that is, the side of the first isolation wall 41 close to the driving substrate 10 and the side of the second isolation wall 42 away from the driving substrate 10 abut and completely overlap, thereby avoiding the problem of light leakage at the position between the first isolation wall 41 and the second isolation wall 42.

[0058] Furthermore, the adjacent light-emitting units 20 share the same first isolation wall 41. That is, a first isolation wall 41 is provided between the adjacent light-emitting units 20 to simplify the retaining wall structure 40. In a specific embodiment, the first isolation wall 41 and the second isolation wall 42 are substantially the same in shape and size, and the first isolation wall 41 and the second isolation wall 42 can be manufactured using the same mask, thereby avoiding the additional cost of the mask. 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 the light after passing through the light conversion layer 30, and thus improve the cross-color phenomenon.

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

[0060] When manufacturing the retaining wall structure 40 and the light conversion layer 30, the first isolation wall 41 is formed on the packaging substrate 60 by using a mask plate for exposure, development and etching. The first isolation wall 41 has a plurality of light conversion openings 413, and then light conversion layers 30 of different colors are formed in the corresponding light conversion openings 413 in turn, and then the first packaging layer 51 is filled in the light conversion openings 413 to encapsulate the light conversion layer 30 to block water and oxygen, prevent the light conversion layer 30 from being corroded by water and oxygen, and at the same time make the side of the packaging substrate 60 close to the driving substrate 10 more flat; the second isolation wall 41 has a plurality of light conversion openings 413, and then the light conversion layers 30 of different colors are formed in the corresponding light conversion openings 413 in turn, and then the first packaging layer 51 is filled in the light conversion openings 413 to encapsulate the light conversion layer 30 to block water and oxygen, and prevent the light conversion layer 30 from being corroded by water and oxygen, and at the same time make the side of the packaging substrate 60 close to the driving substrate 10 more flat; The separation wall 42 is formed on the driving substrate 10 by exposure, development and etching through the same mask. The second isolation wall 42 is also formed with a plurality of pixel openings 421 corresponding to the light conversion openings 413. Each pixel opening 421 is provided with a light-emitting unit 20. Then, the second encapsulation layer 52 is filled in the pixel opening 421 to encapsulate the light-emitting unit 20, so as to block water and oxygen and prevent the light-emitting unit 20 from being corroded by water and oxygen. At the same time, the side of the driving substrate 10 close to the encapsulation substrate 60 is made smoother, which is beneficial to the substrate encapsulation pair group and light propagation on both sides. At the same time, the first encapsulation layer 51 and the second encapsulation layer 52 can also be made with the retaining wall structure 40 using the same mask. The difference is that the first encapsulation layer 51 and the second encapsulation layer 52 can be made using negative photoresist, and the first isolation wall 41 and the second isolation wall 42 can be made using positive photoresist, or vice versa. With such a configuration, multiple exposures can be performed through the same mask without additionally increasing the cost of the mask to achieve different structural designs.

[0061] In another embodiment, the second isolation wall 42 and the second encapsulation layer 52 may be first fabricated sequentially on the driving substrate 10; then the first isolation wall 41, the first encapsulation layer 51 and the light conversion layer 30 may be fabricated sequentially on the second encapsulation layer 52, and finally the third encapsulation layer 53 may be fabricated on the light conversion layer 30 or a packaging cover plate may be disposed on the light conversion layer 30, which may be specifically arranged according to actual needs. The specific encapsulation layers may be organic encapsulation layers and / or inorganic encapsulation layers, or multiple layers of inorganic encapsulation layers and organic encapsulation layers, which may be specifically arranged according to 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 when the upper and lower substrates are packaged together may also be avoided.

[0062] See also Figure 3 , Figure 3: is a schematic diagram of the structure of the display panel provided by the second embodiment of the present application. In this embodiment, the retaining wall structure 40 includes a first isolation wall 41 and a second isolation wall 42. The second isolation wall 42 is arranged on the side of the first isolation wall 41 close to the drive substrate 10, and two second isolation walls 42 are arranged between adjacent light-emitting units 20, and the two second isolation walls 42 are in contact on the side close to the drive substrate 10; along the direction away from the drive 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 close to the drive 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 arranged between adjacent light-emitting units 20, that is, there are double second isolation walls 42 between adjacent light-emitting units 20. Such an arrangement reduces the spatial size of the pixel opening 421, but does not change the opening area of ​​the light conversion opening 413. It can reduce the diffuse reflection of the light-emitting unit 20 to the surroundings and downwards in the pixel opening 421 without affecting the aperture ratio, thereby reducing the light of the light-emitting unit 20 to the surroundings and downwards after being reflected from the bottom of the driving substrate 10 and affecting the luminous intensity of the adjacent light-emitting unit 20 area, thereby improving the phenomenon of uneven chromaticity when displaying certain low-gray pure color images, and improving color saturation and display contrast.

[0064] In this embodiment, the thickness of the light conversion layer 30 is substantially the same as the thickness of the first isolation wall 41 in the direction perpendicular to the light conversion layer 30, or slightly less than the thickness of the first isolation wall 41 in the direction perpendicular to the light conversion layer 30, so as to avoid overlapping between adjacent light conversion layers 30, and the encapsulation part 50 may only include the first encapsulation layer 51, and the first encapsulation layer 51 encapsulates the light emitting unit 20 and the corresponding light conversion layer 30. Through the above arrangement, this embodiment can reduce the thickness of the display panel 100, which is conducive to the light and thin design of the display panel 100, and can further reduce the diffuse reflection of the light emitting unit 20 in the pixel opening 421, thereby improving the problem that the light of the light emitting unit 20 to the surroundings and downwards affects the luminous intensity of the adjacent light emitting unit 20 area after being reflected from the bottom of the driving substrate 10. It should be noted that the thickness of the light conversion layer 30 involved in the embodiment of the present application refers to the thickness of the light conversion layer 30 in the direction perpendicular to the driving substrate 10.

[0065] See also Figure 4 , Figure 4: is a schematic diagram of the structure of the display panel provided in the third embodiment of the present application. In this embodiment, the retaining wall structure 40 includes a first isolation wall 41 and a third isolation wall 43. The third isolation wall 43 is arranged on a side of the first isolation wall 41 away from the drive substrate 10, and overlaps with the first isolation wall 41 in a direction perpendicular to the drive 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 to form a light collecting 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 the first isolation wall 41 in a direction parallel to the light conversion layer 30 to form a light convergence 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 exceed the first isolation wall 41.

[0067] Specifically, a first encapsulation layer 51 is further provided on the driving substrate 10, and the first encapsulation layer 51 is used to encapsulate and flatten the light-emitting unit 20, so as to prevent the light-emitting unit 20 from being corroded by water and oxygen, and to flatten the side of the light-emitting unit 20 away from the driving substrate 10. The first isolation wall 41 is provided on the first encapsulation layer 51, and a plurality of the above-mentioned light conversion openings 413 are formed after patterning. The light conversion layer 30 is provided 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 overlap problem 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 from the first isolation wall 41 in a direction parallel to the light conversion layer 30 to form a light convergence portion 401, thereby converging the outgoing light of the light conversion layer 30 and improving the problem of overlapping of the outgoing light of adjacent light conversion layers 30 to cause cross-color.

[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 drive substrate 10 can both be regular trapezoids, so that 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 and exceeds the first isolation wall 41 to form a light collecting portion 401. The first isolation wall 41 and the third isolation wall 43 can be made using the same mask, 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 preparation, the sizes of the first isolation wall 41 and the third isolation wall 43 can be slightly different by changing preparation parameters such as exposure parameters.

[0069] Further, a second encapsulation layer 52 is filled in 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 drive 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 of the first encapsulation layer 51, the second encapsulation layer 52, and the third encapsulation layer 53 involved in the above embodiments.

[0070] See also Figure 5 , Figure 5 4 is a schematic diagram of the structure of the display panel provided in the fourth embodiment of the present application. Further, in the present embodiment, the retaining wall 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 and the orthographic projection of the second isolation wall 42 on the driving substrate 10 at least partially overlap.

[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, 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 adjacent light-emitting unit 20 area to affect the brightness display.

[0072] See also Figure 6 , Figure 6 is a schematic diagram of the structure of a display panel provided in the fifth embodiment of the present application. Figure 5 The difference from the embodiment is that in this embodiment, two second isolation walls 42 are provided between adjacent light emitting units 20. Figure 3 Similar to the embodiment, by setting a double second isolation wall 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. Without affecting the aperture ratio, the diffuse reflection of the light-emitting unit 20 to the surroundings and downwards in the pixel opening 421 can be reduced, thereby reducing the light intensity of the light-emitting unit 20 to the surroundings and downwards after being reflected by the bottom of the driving substrate 10 and affecting the adjacent light-emitting unit 20 area, thereby improving the phenomenon of uneven chromaticity when displaying certain low-gray pure color images, and improving color saturation and display contrast.

[0073] See also Figure 7 and Figure 8 , Figure 7 is a schematic diagram of the structure of a display panel provided in a sixth embodiment of the present application, Figure 8 yes Figure 6A schematic diagram of a top view of a light shielding layer provided in an embodiment. Further, in this embodiment, a light shielding layer 70 is provided on a surface of the driving substrate 10 close to the light conversion layer 30, and the light shielding layer 70 has a plurality of hollow portions 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 side of the driving substrate 10 close to the light conversion layer 30, and has a plurality of hollow portions 71 to leave a space for the light emitting unit 20. By arranging the light shielding layer 70 on the driving substrate 10, it is used to block the light of the light emitting unit 20, so as to avoid the problem that the light of the light emitting unit 20 is incident on the bottom of the driving substrate 10 and is reflected to the adjacent light emitting unit 20 area, that is, to block the bottom reflection problem of the light emitting unit 20, so as to avoid affecting the display brightness of the adjacent light emitting unit 20 area, and improve the phenomenon of uneven color when displaying certain low grayscale pure color pictures. In one embodiment, the material of the light shielding layer 70 can be a light-absorbing insulating material, for example, it can be the same as the material of the isolation wall, so as to block the light. In another embodiment, the material of the light shielding layer 70 can also be an insulating material with reflective properties, which can reflect the light while blocking the light, thereby improving the luminous efficiency of the light emitting unit 20 and improving the display brightness.

[0075] See also Fig. 9 , Fig. 9 1 is a schematic diagram of the structure of the display panel provided in the seventh embodiment of the present application. In this embodiment, the display panel 100 further includes a heat dissipation layer 80, which is disposed on a side of the drive substrate 10 away from the light conversion layer 30; the material of the heat dissipation layer 80 is graphene material.

[0076] Specifically, the heat dissipation layer 80 can be coated on the front 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 time, thereby avoiding heat accumulation and reducing the life of the light conversion layer 30 and the light-emitting unit 20. In addition, 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 the adjacent light-emitting unit 20 area. Furthermore, due to the insulating properties of the graphene material, the heat dissipation layer 80 can also effectively prevent the occurrence of problems such as electrostatic breakdown caused by static electricity accumulation.

[0077] See also Fig.10 , Fig.10 is a schematic diagram of the structure of a display panel provided in the eighth embodiment of the present application. Fig. 9The difference from the embodiment is that in this embodiment, the heat dissipation layer 80 includes a plurality of heat dissipation parts 81 , the heat dissipation parts 81 correspond to the light emitting units 20 one by one, and the orthographic projections of the heat dissipation parts 81 on the driving substrate 10 cover the light emitting units 20 .

[0078] Specifically, the shape and size of the heat dissipation portion 81 can be the same as the shape and size of the hollow portion 71 of the light shielding layer 70, so that when the heat dissipation layer 80 is manufactured, the mask plate used to manufacture the light shielding layer 70 can be used for evaporation to form multiple heat dissipation portions 81, thereby saving the cost of the mask plate. At the same time, by making the heat dissipation layer 80 include multiple hollow portions 71 instead of coating the entire surface, the amount of graphene material can be saved and the manufacturing cost can be reduced. Similarly, when the heat dissipation layer 80 is manufactured using the same mask plate, the photoresist polarity of the material of the heat dissipation layer 80 needs to be opposite to the photoresist polarity of the material of the light shielding layer 70.

[0079] See also Fig.11 , Fig.11 1 is a schematic diagram of the structure of a display device provided in an embodiment of the present application. In this embodiment, a display device is provided, and the display device includes a display panel 100 and a control circuit board 200. The display panel 100 is the display panel 100 provided in the above embodiment, and the control circuit board 200 is electrically connected to the display panel 100, specifically to the drive substrate 10, and is used to control the display panel 100 so that the display panel 100 displays a corresponding image in a corresponding control manner.

[0080] The display device can effectively improve the problem of light emitting areas overlapping after light passes through the light conversion layer 30 due to the distance between light conversion layers 30 of different colors being too close and the narrow baffle wall, thereby improving the cross-color problem.

[0081] The above are only implementation methods of the present application, and are not intended to limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, comprising: Driver 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, corresponding to the light emitting unit one by one; Along a direction perpendicular to the driving substrate, the orthographic projection of the light conversion layer on the driving substrate covers the light emitting unit; A retaining wall structure is arranged between adjacent light conversion layers; Characterized in that the retaining wall structure comprises: a first isolation wall, wherein the first isolation wall is disposed on the same layer as the light conversion layer; a second isolation wall, which is disposed on a side of the first isolation wall close to the driving substrate and overlaps with the first isolation wall in a direction perpendicular 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 with the first isolation wall in a direction perpendicular to the driving substrate; 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 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-gathering portion.

2. The display panel according to claim 1, characterized in that: The retaining wall structure includes the first isolation wall and the second isolation wall; the second isolation wall is arranged on a side of the first isolation wall close to the driving substrate and surrounds the light-emitting unit; the packaging part is filled in the space surrounded by the driving substrate, the retaining wall structure and the light conversion layer.

3. The display panel according to claim 2, characterized in that: 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 along the direction away from the driving substrate, the light conversion layer does not exceed the first isolation wall; the adjacent light-emitting units share the same first isolation wall; the side of the first isolation wall close to the driving substrate abuts and completely overlaps with the side of the second isolation wall away from the driving substrate.

4. The display panel according to claim 2, characterized in that: Two second isolation walls are arranged between adjacent light-emitting units, and the two second isolation walls are in contact at a side close to the driving substrate; Along the direction away from the driving substrate, the cross-sectional area of ​​the second isolation wall gradually decreases, so that there is a gap between adjacent second isolation walls, and the first isolation wall covers the gap on a side close to the driving substrate.

5. The display panel according to claim 1, characterized in that: The retaining wall structure includes 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 to form the light collecting 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 exceed the first isolation wall.

6. The display panel according to claim 5, characterized in that: The retaining wall structure also includes a second isolation wall, which is arranged 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 at least partially overlaps with the orthographic projection of the third isolation wall on the driving substrate.

7. The display panel according to claim 1, characterized in that: A light shielding layer is further provided on a surface of the driving substrate close to the light conversion layer. The light shielding layer has a plurality of hollow portions 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.

8. The display panel according to claim 1, characterized in that: The display panel further comprises a heat dissipation layer, which is arranged on a side of the driving substrate away from the light conversion layer; the material of the heat dissipation layer is graphene material.

9. The display panel according to claim 8, characterized in that: The heat dissipation layer includes a plurality of heat dissipation parts, each of the heat dissipation parts corresponds to the light emitting units one by one, and the orthographic projections of the heat dissipation parts on the driving substrate cover the light emitting units.

10. A display device, characterized in that: include: The display panel is a display panel as claimed in any one of claims 1 to 9; The control circuit board is connected to the display panel and is used to control the display panel to display images.

Images