Display panel, manufacturing method thereof and display device

Abstract

The invention discloses a display panel, a manufacturing method thereof and a display device, and belongs to the technical field of display. The display panel comprises a substrate, a plurality of light emitting devices and a plurality of dimming parts. After light emitted by the light-emitting device enters the substrate, the dimming part is in direct contact with the side, away from the light-emitting device, of the substrate, and the refractive index of the dimming part is larger than that of the substrate. Therefore, in the light entering the substrate, the light emitted to the interface where the substrate is in contact with the dimming part is not totally reflected on the interface, but is refracted into the dimming part, so that the transmission path of the light is changed, and the refracted light can be emitted from one side, deviating from the light-emitting device, of the substrate. Therefore, the light emitting efficiency of the display panel can be improved. The side, away from the substrate, of the dimming part is provided with an optical coupling-out structure. When light entering the dimming part is emitted from the side, away from the substrate, of the dimming part, diffraction and interference occur in the optical coupling-out structure, so that the viewing angle range of the light emitted from the dimming part is large, and the viewing angle of the display panel is wide.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) display panels are hailed as the next generation of display devices due to their advantages such as self-luminescence, high efficiency, bright colors, light weight, power saving and rollability, and have attracted increasing attention in recent years.

[0003] However, the current OLED display screen has a relatively low light output efficiency. In order to increase the brightness, the only way is to increase the current, which results in high power consumption and short life of the display device. Summary of the invention

[0004] The embodiments of the present application provide a display panel and a manufacturing method thereof, and a display device, which can solve the problem of low light extraction efficiency of the OLED display panel in the prior art. The technical solution is as follows:

[0005] In one aspect, a display panel is provided, comprising: a substrate, a plurality of light emitting devices and a plurality of dimming units;

[0006] The plurality of light emitting devices are located on one side of the substrate, and the plurality of light emitting devices are all used to emit light toward one side of the substrate;

[0007] The plurality of dimming parts are located on a side of the substrate away from the plurality of light-emitting devices, the plurality of dimming parts correspond to the plurality of light-emitting devices, the orthographic projections of the dimming parts on the substrate overlap with the orthographic projections of the corresponding light-emitting devices on the substrate, and the dimming parts are in direct contact with the side of the substrate away from the light-emitting devices;

[0008] The refractive index of the dimming part is greater than the refractive index of the substrate, and a side of the dimming part facing away from the substrate has a light outcoupling structure.

[0009] Optionally, the dimming unit includes: a first sub-dimming unit and a second sub-dimming unit which are stacked; the second sub-dimming unit covers a side of the first sub-dimming unit which is away from the substrate;

[0010] Wherein, a side of the second sub-dimming unit away from the first sub-dimming unit has the light out-coupling structure.

[0011] Optionally, the display panel further includes: an auxiliary dimming layer, the orthographic projection of the auxiliary dimming layer on the substrate does not overlap with the orthographic projection of the plurality of dimming parts on the substrate, and the auxiliary dimming layer is in direct contact with a side of the substrate away from the light-emitting device;

[0012] Among them, the refractive index of the auxiliary light-dimming layer is greater than that of the substrate.

[0013] Optionally, the auxiliary light-dimming layer has a plurality of openings, the plurality of openings correspond to the plurality of light-dimming parts, and the second sub-light-dimming part in the light-dimming part is connected to the auxiliary light-dimming layer at the corresponding opening position.

[0014] Optionally, the second sub-light-dimming part and the auxiliary light-dimming layer are arranged on the same layer and have the same material.

[0015] Optionally, the optical coupling out structure includes a plurality of linearly arranged grooves in parallel.

[0016] Optionally, the shape of the light-dimming part on the substrate is an ellipse, and the major axis direction of the ellipse is parallel to the extending direction of the linearly arranged grooves.

[0017] Optionally, the side of the light-dimming part facing away from the substrate is an arc convex surface.

[0018] Optionally, the plurality of light-emitting devices are used to emit white light, or the plurality of light-emitting devices include: a plurality of light-emitting devices for emitting red light, a plurality of light-emitting devices for emitting blue light, and a plurality of light-emitting devices for emitting green light.

[0019] On the other hand, a manufacturing method of a display panel is provided, and the method includes:

[0020] Forming the plurality of light-emitting devices on one side of the substrate; the plurality of light-emitting devices are all used to emit light toward one side of the substrate;

[0021] Forming a plurality of light-dimming parts on the side of the substrate facing away from the plurality of light-emitting devices; the plurality of light-dimming parts correspond to the plurality of light-emitting devices, the orthographic projection of the light-dimming part on the substrate intersects with the orthographic projection of the corresponding light-emitting device on the substrate, and the light-dimming part is in direct contact with the side of the substrate facing away from the light-emitting device;

[0022] Among them, the refractive index of the light-dimming part is greater than that of the substrate, and the side of the light-dimming part facing away from the substrate has an optical coupling out structure.

[0023] Optionally, forming the plurality of light-dimming parts includes:

[0024] Forming a plurality of first sub-light-dimming parts on the side of the substrate facing away from the light-emitting device;

[0025] Forming an organic material thin film on the side of the plurality of first sub-light-dimming parts facing away from the substrate, and the organic material thin film covers the plurality of first sub-light-dimming parts;

[0026] The portion of the organic material thin film covering the plurality of first sub-dimming portions is processed to form a plurality of second sub-dimming portions; the plurality of second sub-dimming portions correspond to the plurality of first sub-dimming portions, the second sub-dimming portion is located on the side of the corresponding first sub-dimming portion away from the substrate, and the side of the second sub-dimming portion away from the corresponding first sub-dimming portion has the light extraction structure;

[0027] Wherein, the portion of the organic material thin film other than covering the plurality of first sub-dimming portions is an auxiliary dimming layer, and the auxiliary dimming layer is in direct contact with the side of the substrate away from the light-emitting device.

[0028] Optionally, processing the portion of the organic material thin film covering the plurality of first sub-dimming portions to form a plurality of second sub-dimming portions includes:

[0029] Providing a light extraction template; the light extraction template has a plurality of arc-shaped grooves corresponding to the plurality of first sub-dimming portions, and there are a plurality of auxiliary grooves arranged in parallel in the arc-shaped grooves;

[0030] The light extraction template is buckled on the substrate formed with the organic material thin film to press the organic material thin film; the first sub-dimming portion and the second sub-dimming portion of the organic material thin film covering the first sub-dimming portion are both located in the corresponding arc-shaped grooves, so that the plurality of auxiliary grooves in the arc-shaped grooves can press the side of the second dimming portion away from the first dimming portion;

[0031] The light extraction template is removed from the substrate to obtain the plurality of second sub-dimming portions and the auxiliary dimming layer, and the light extraction structure on the side of the obtained second sub-dimming portion away from the first sub-dimming portion; the light extraction structure includes a plurality of linear grooves arranged in parallel and matching the plurality of auxiliary grooves.

[0032] Optionally, the method further includes:

[0033] After forming the plurality of first sub-dimming portions, an organic solution is poured on the side of the plurality of first sub-dimming portions away from the substrate and cured to form a concave array template; the concave array template has the plurality of arc-shaped grooves;

[0034] The concave array template is peeled off from the substrate, and a tensile force is applied to the concave array template;

[0035] The side of the concave array template having the plurality of arc-shaped grooves is etched;

[0036] canceling the tensile force applied to the concave array template to form a plurality of auxiliary grooves in the arc-shaped groove to obtain the optical coupling template;

[0037] Wherein, the direction of stretching the concave array template is parallel to the extending direction of the auxiliary grooves.

[0038] Optionally, forming the plurality of first sub-dimming units includes:

[0039] A dimming film is formed on a side of the substrate facing away from the light emitting device.

[0040] Performing patterning on the dimming film to form a plurality of dimming columns;

[0041] The plurality of dimming columns are subjected to a heating process to form the plurality of first dimming sub-units.

[0042] On the other hand, a display device includes: a power supply component and a display panel, wherein the display panel is the display panel as described in any one of the above claims, and the power supply component is used to supply power to the display panel.

[0043] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0044] In the display panel provided by the embodiment of the present application, when the light emitted by the light-emitting device enters the substrate, the dimming part is in direct contact with the side of the substrate facing away from the light-emitting device, and the refractive index of the dimming part is greater than the refractive index of the substrate. Therefore, the light entering the substrate and emitting toward the interface where the substrate and the dimming part contact will not be totally reflected at the interface, but will be refracted into the dimming part, thereby changing the transmission path of the light, so that the refracted light can be emitted from the side of the substrate facing away from the light-emitting device. In this way, the light extraction efficiency of the display panel can be improved, and then the brightness of the display panel can be increased without increasing the current, thereby reducing the power consumption of the display panel and increasing the service life of the display panel. In addition, the side of the dimming part facing away from the substrate also has an optical coupling structure. When the light entering the dimming part is emitted from the side of the dimming part facing away from the substrate, diffraction and interference can occur in the optical coupling structure, so that the viewing angle range of the light emitted from the dimming part is larger, thereby making the viewing angle of the display panel wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] 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 creative work.

[0046] Figure 1It is a schematic diagram of the film layer structure of a display panel provided by an embodiment of the present application;

[0047] Figure 2 It is a bottom view of a display panel provided by an embodiment of the present application;

[0048] Figure 3 is Figure 2 A schematic diagram of the film layer structure of the display panel shown at A-A';

[0049] Figure 4 It is an enlarged view of a dimming unit 300 provided by an embodiment of the present application;

[0050] Figure 5 It is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present application;

[0051] Figure 6 It is a manufacturing flow chart of a manufacturing method of a display panel provided by an embodiment of the present application;

[0052] Figure 7 It is a schematic diagram of the film layer structure for forming a plurality of pixel circuits, a plurality of light-emitting devices and a packaging layer provided by an embodiment of the present application;

[0053] Figure 8 It is a schematic diagram of the film layer structure for forming a dimming thin film on a substrate provided by an embodiment of the present application;

[0054] Figure 9 It is a schematic diagram of the film layer structure for forming a light guide column provided by an embodiment of the present application;

[0055] Figure 10 It is a schematic diagram of the film layer structure for forming a first sub-dimming unit provided by an embodiment of the present application;

[0056] Figure 11 It is a schematic diagram of the film layer structure for forming a concave array template on the first sub-dimming unit provided by an embodiment of the present application;

[0057] Figure 12 It is a top view of an optical coupling template provided by an embodiment of the present application;

[0058] Figure 13 It is a schematic diagram of the film layer structure for forming an organic material thin film provided by an embodiment of the present application;

[0059] Figure 14 It is a schematic diagram for forming a second sub-dimming unit provided by an embodiment of the present application. Detailed implementation manners

[0060] To make the objectives, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0061] Please refer to Figure 1 , Figure 1 which is a schematic diagram of the film layer structure of a display panel provided by an embodiment of the present application. The display panel 000 includes: a substrate 100, a plurality of light-emitting devices 200, and a plurality of light-dimming parts 300.

[0062] The plurality of light-emitting devices 200 in the display panel 000 are located on one side of the substrate 100, and the plurality of light-emitting devices 200 are all used to emit light towards one side of the substrate 100. That is to say, the light-emitting device 200 can be a bottom-emitting type light-emitting device.

[0063] The plurality of light-dimming parts 300 in the display panel 000 are located on the side of the substrate 100 facing away from the plurality of light-emitting devices 200. The plurality of light-dimming parts 300 correspond to the plurality of light-emitting devices 200. The orthographic projection of the light-dimming part 300 on the substrate 100 overlaps with the orthographic projection of the corresponding light-emitting device 200 on the substrate 100. And the light-dimming part 300 is in direct contact with the side of the substrate 100 facing away from the light-emitting device 200, and the refractive index of the light-dimming part 300 is greater than the refractive index of the substrate 100.

[0064] In this case, after the light emitted by the light-emitting device 200 enters the substrate 100, since the light-dimming part 300 is in direct contact with the side of the substrate 100 facing away from the light-emitting device 200, and the refractive index of the light-dimming part 300 is greater than the refractive index of the substrate 100. Therefore, the light (for example, light a) in the light entering the substrate 100 that is incident on the interface between the substrate 100 and the light-dimming part 300 will not undergo total internal reflection at this interface, but will be refracted into the light-dimming part 300, thereby changing the transmission path of the light a, so that the refracted light can be emitted from the side of the substrate 100 facing away from the light-emitting device 200. In this way, the light extraction efficiency of the display panel 000 can be improved, and further, the brightness of the display panel 000 can be increased without increasing the current, so that the power consumption of the display panel 000 can be reduced and the service life of the display panel 000 can be improved.

[0065] In addition, the side of the light-dimming part 300 facing away from the substrate 100 further has a light coupling and extraction structure 301. When the light entering the light-dimming part 300 is emitted from the side of the light-dimming part 300 facing away from the substrate 100, diffraction and interference can occur in the light coupling and extraction structure 301, so that the viewing angle range of the light emitted from the light-dimming part 300 is larger, and further the viewing angle of the display panel 000 is wider.

[0066] In summary, for the display panel provided in the embodiments of the present application, when the light emitted by the light-emitting device enters the substrate, since the light-dimming part is in direct contact with the side of the substrate facing away from the light-emitting device, and the refractive index of the light-dimming part is greater than that of the substrate. Therefore, the light rays in the substrate that are incident on the interface between the substrate and the light-dimming part will not undergo total internal reflection at this interface, but will be refracted into the light-dimming part, thereby changing the transmission path of the light rays, so that the refracted light rays can exit from the side of the substrate facing away from the light-emitting device. In this way, the light extraction efficiency of the display panel can be improved, and further, the brightness of the display panel can be increased without increasing the current, thereby reducing the power consumption of the display panel and extending the service life of the display panel. In addition, the side of the light-dimming part facing away from the substrate also has a light coupling and extraction structure. When the light rays entering the light-dimming part exit from the side of the light-dimming part facing away from the substrate, diffraction and interference can occur in the light coupling and extraction structure, so that the viewing angle range of the light rays exiting from the light-dimming part is relatively large, and thus the viewing angle of the display panel is relatively wide.

[0067] In the embodiments of the present application, please refer to Figure 2 and Figure 3 , Figure 2 which is a bottom view of a display panel provided in the embodiments of the present application. Figure 3 is Figure 2 a schematic diagram of the film layer structure of the display panel shown at A-A'. The light coupling and extraction structure 301 in the light-dimming part 300 includes a plurality of linearly arranged grooves 301a arranged in parallel. It should be noted that the light coupling and extraction structure 301 in the light-dimming part 300 can be a grating. When light rays pass through the grating, diffraction and interference phenomena occur, so that the light rays originally concentrated in a relatively small viewing angle area will be dispersed to a larger viewing angle area.

[0068] It should be noted that the diameter and height of the light-dimming part 300 will affect the light extraction efficiency of the display panel 000. Therefore, by adjusting the ratio of the height to the diameter of the light-dimming part 300, the light extraction efficiency of the display panel 000 can be increased. Exemplarily, when the diameter of the light-dimming part 300 is 10 to 20 micrometers and the ratio of the height to the diameter is 0.3 to 0.4, the light extraction efficiency of the display panel 000 can be increased by about 50%. In addition, by adjusting the distance between the plurality of light-dimming parts 300, the uniformity of the light rays exiting from the display panel 000 can be made better. Exemplarily, the distance range between the plurality of light-dimming parts 300 is 10 to 15 micrometers.

[0069] It should also be noted that the light-dimming part 300 does not affect the spectrum of the light exiting from the display panel 000, ensuring the color range and color accuracy presented by the display panel 000, and making the display effect of the display panel 000 better.

[0070] In this application, the side of the light-dimming part 300 facing away from the substrate 100 is an arc convex surface, and the shape of the light-dimming part 300 on the substrate 100 can be an ellipse, and the long axis direction of the ellipse can be parallel to the extension direction of the plurality of linearly arranged grooves 301a.

[0071] It should be noted that in other embodiments, the shape of the light-dimming part 300 in the display panel 000 on the substrate 100 can be other shapes, such as circular or square, etc., and this application does not limit this.

[0072] In the embodiment of this application, a plurality of light-dimming parts 300 can correspond to at least one light-emitting unit 200, and the orthographic projection of at least one light-emitting unit 200 corresponding to the light-dimming part 300 on the substrate 100 is located within the orthographic projection of the light-dimming part 300 on the substrate 100. In this way, after the light emitted by each light-emitting device 200 passes through the light extraction structure 301 in the light-dimming part 300, the light-dimming part 300 can effectively increase the light-emitting viewing angle of each light-emitting device 200.

[0073] In this application, a plurality of light-emitting devices 200 can be used to emit white light. Or, as Figure 3 shown, a plurality of light-emitting devices 200 can include: a plurality of light-emitting devices 210 for emitting red light, a plurality of light-emitting devices 220 for emitting blue light, and a plurality of light-emitting devices 230 for emitting green light.

[0074] Among them, the light-emitting device 200 can include an anode layer, a hole transport layer, a light-emitting layer, an electron transport layer, and a cathode layer stacked in a direction away from the substrate 100. Exemplarily, the thickness of the hole transport layer is usually in the range of 5 nanometers to 150 nanometers, the film thickness of the light-emitting layer is usually in the range of 2 nanometers to 80 nanometers, and the film thickness of the electron transport layer is usually in the range of 5 nanometers to 100 nanometers. Here, in some other embodiments, the light-emitting device 200 can further include a hole injection layer located between the anode layer and the hole transport layer, and an electron injection layer located between the electron transport layer and the cathode layer, and the embodiment of this application does not limit this.

[0075] It should be noted that the display panel 000 further includes: a plurality of pixel driving circuits ( Figure 3 not shown in the figure) located between the plurality of light-emitting devices 200 and the substrate 100, and a packaging layer 400 located on the side of the light-emitting device 200 facing away from the substrate 100. The plurality of pixel driving circuits correspond to the plurality of light-emitting devices 200, and the plurality of pixel driving circuits are electrically connected to the plurality of light-emitting devices 200, so that the light-emitting devices 200 emit light under the drive of the corresponding pixel driving circuits. The packaging layer 400 can be used to package the light-emitting devices 200 to prevent water and oxygen in the external environment from eroding the light-emitting layer in the light-emitting devices 200 from the side facing away from the display side of the display panel 000.

[0076] It should also be noted that the light-emitting layer in the light-emitting device 200 can be a single light-emitting layer, or the light-emitting layer in the light-emitting device 200 can be composed of multiple stacked sub-light-emitting layers, and each sub-light-emitting layer is connected in series through a charge generation layer.

[0077] When multiple light-emitting devices 200 include multiple light-emitting devices 210 for emitting red light, multiple light-emitting devices 220 for emitting blue light, and multiple light-emitting devices 230 for emitting green light, and multiple dimming units 300 can correspond to the multiple light-emitting units 200 one by one, the structural parameters of the light coupling and output structure 301 in the dimming unit 300 corresponding to the light-emitting device 210, the dimming unit 300 corresponding to the light-emitting device 220, and the dimming unit 300 corresponding to the light-emitting device 230 can be different. In this way, the light coupling and output structure 301 can adjust its structural parameters for light of different wavelengths, so that the diffraction angles of light of different wavelengths are relatively large, further increasing the range of the light-emitting viewing angle of the display panel 000.

[0078] Here, please refer to Figure 4 , Figure 4 is an enlarged view of a dimming unit 300 provided by an embodiment of the present application. The structural parameters of the light coupling and output structure 301 can include at least one of the center distance Λ between two adjacent linear grooves 301a, the depth H of the linear groove 301a, and the width D of the linear groove 301a. It should be noted that by adjusting at least one of the structural parameters in the linear groove 301a, the light-emitting viewing angle of the display panel 000 can be increased.

[0079] Among them, the center distance Λ refers to the distance between the central axes of two adjacent linear grooves 301a. Exemplarily, the height H of the light coupling and output structure 301 ranges from 400 nanometers to 1000 nanometers, the width D ranges from 200 nanometers to 600 nanometers, and the center distance Λ ranges from 400 nanometers to 2000 nanometers.

[0080] In the embodiment of the present application, as Figure 3 shown, the dimming unit 300 in the display panel 000 can include a first sub-dimming unit 310 and a second sub-dimming unit 320 that are stacked. And the second sub-dimming unit 320 covers the side of the first sub-dimming unit 310 facing away from the substrate 100. Among them, the side of the second sub-dimming unit 320 facing away from the first sub-dimming unit 310 has a light coupling and output structure 301.

[0081] In this case, after the light emitted by the light-emitting device 200 enters the substrate 100, since the first sub-dimming portion 310 is in direct contact with the side of the substrate 100 facing away from the light-emitting device 200, and the refractive index of the first sub-dimming portion 310 is greater than that of the substrate 100. Therefore, among the light rays entering the substrate 100, the light rays incident on the interface between the substrate 100 and the first sub-dimming portion 310 will not undergo total internal reflection at this interface, but will be refracted into the first sub-dimming portion 310, thereby changing the light transmission path and enabling the refracted light rays to exit from the side of the substrate 100 facing away from the light-emitting device 200. In this way, the light extraction efficiency of the display panel 000 can be improved, and then the brightness of the display panel 000 can be increased without increasing the current, thereby reducing the power consumption of the display panel 000 and increasing the service life of the display panel 000.

[0082] In addition, when the light rays exit from the side of the first sub-dimming portion 310 facing away from the substrate 100 and enter the second sub-dimming portion 320, since the side of the second sub-dimming portion 320 facing away from the first sub-dimming portion 310 has a light coupling and extraction structure 301, when the light rays entering the second sub-dimming portion 320 exit from the side of the second sub-dimming portion 320 facing away from the substrate 100, diffraction and interference can occur in the light coupling and extraction structure 301, resulting in a larger viewing angle range of the light rays exiting from the second sub-dimming portion 320, and thus a wider viewing angle of the display panel 000.

[0083] In the embodiment of the present application, please refer to Figure 5 , Figure 5 FIG. is a schematic diagram of the film layer structure of another display panel provided by the embodiment of the present application. The display panel 000 may further include: an auxiliary dimming layer 500. The orthographic projection of the auxiliary dimming layer 500 on the substrate 100 does not overlap with the orthographic projection of the plurality of dimming portions 300 on the substrate 100, and the auxiliary dimming layer 500 is in direct contact with the side of the substrate 100 facing away from the light-emitting device 200. Among them, the refractive index of the auxiliary dimming layer 500 is greater than that of the substrate 100.

[0084] In this case, after the light emitted by the light emitting device 200 enters the substrate 100, since the auxiliary dimming layer 500 is in direct contact with the side of the substrate 100 facing away from the light emitting device 200, and the refractive index of the auxiliary dimming layer 500 is greater than the refractive index of the substrate 100, among the light rays entering the substrate 100, the light rays (for example, light rays b) that are emitted toward the interface where the substrate 100 and the auxiliary dimming layer 500 contact each other will not be totally reflected at the interface, but will be refracted into the auxiliary dimming layer 500, thereby changing the transmission path of the light rays, so that the refracted light rays can be emitted from the side of the substrate 100 facing away from the light emitting device 200, and then the light rays entering the auxiliary dimming layer 500 can be emitted from the side of the auxiliary dimming layer 500 facing away from the substrate 100, further improving the light extraction efficiency of the display panel 000, and then improving the brightness of the display panel 000 without increasing the current, thereby reducing the power consumption of the display panel 000 and improving the service life of the display panel 000.

[0085] It should be noted that the auxiliary dimming layer 500 has a plurality of openings K, and the plurality of openings K correspond to the plurality of dimming units 300. The second sub-dimming unit 320 in the dimming unit 300 is connected to the auxiliary dimming layer 300 at the position of the corresponding opening K. In this way, the light emitted from the side of the substrate 100 away from the light-emitting device 200 will not be totally reflected on the side of the substrate 100 away from the light-emitting device 200, and the light entering the substrate 100 can be emitted from the side of the substrate 100 away from the light-emitting device 200, which can effectively improve the light extraction efficiency of the display panel 000.

[0086] In this case, the second sub-dimming unit 320 and the auxiliary dimming layer 500 are disposed in the same layer and made of the same material.

[0087] It should also be noted that, in the present application, two structures are arranged in the same layer and made of the same material, which means that the film layer where the two structures are located is the same film layer and can be formed simultaneously through the same process. For example, the film layer where the second sub-dimming unit 320 and the auxiliary dimming layer 500 are located is the same organic material layer, and the second sub-dimming unit 320 and the auxiliary dimming layer 500 can be formed simultaneously through the same process.

[0088] In summary, for the display panel provided in the embodiment of the present application, when the light emitted by the light-emitting device enters the substrate, since the light-dimming portion is in direct contact with the side of the substrate facing away from the light-emitting device, and the refractive index of the light-dimming portion is greater than that of the substrate. Therefore, among the light rays entering the substrate, the light rays incident on the interface between the substrate and the light-dimming portion will not undergo total internal reflection at this interface, but will be refracted into the light-dimming portion, thereby changing the transmission path of the light rays, so that the refracted light rays can exit from the side of the substrate facing away from the light-emitting device. In this way, the light extraction efficiency of the display panel can be improved, and further, the brightness of the display panel can be increased without increasing the current, thereby reducing the power consumption of the display panel and increasing the service life of the display panel. In addition, the side of the light-dimming portion facing away from the substrate further has a light coupling and extraction structure. When the light rays entering the light-dimming portion exit from the side of the light-dimming portion facing away from the substrate, diffraction and interference can occur in the light coupling and extraction structure, so that the viewing angle range of the light rays exiting from the light-dimming portion is relatively large, and further the viewing angle of the display panel is relatively wide.

[0089] The embodiment of the present application further provides a manufacturing method of a display panel, and this manufacturing method of the display panel is used to manufacture Figure 1 the display panel shown. The manufacturing method of this display panel includes:

[0090] Step S1: Form a plurality of light-emitting devices on one side of the substrate, and all the plurality of light-emitting devices are used to emit light rays toward the side of the substrate.

[0091] Step S2: Form a plurality of light-dimming portions on the side of the substrate facing away from the plurality of light-emitting devices. The plurality of light-dimming portions correspond to the plurality of light-emitting devices. The orthographic projection of the light-dimming portion on the substrate overlaps with the orthographic projection of the corresponding light-emitting device on the substrate, and the light-dimming portion is in direct contact with the side of the substrate facing away from the light-emitting device.

[0092] Wherein, the refractive index of the light-dimming portion is greater than that of the substrate, and the side of the light-dimming portion facing away from the substrate has a light coupling and extraction structure.

[0093] In summary, for the display panel provided in the embodiment of the present application, when the light emitted by the light-emitting device enters the substrate, since the light-dimming part is in direct contact with the side of the substrate facing away from the light-emitting device, and the refractive index of the light-dimming part is greater than that of the substrate. Therefore, among the light rays entering the substrate, the light rays incident on the interface between the substrate and the light-dimming part will not undergo total internal reflection at this interface, but will be refracted into the light-dimming part, thereby changing the transmission path of the light rays, so that the refracted light rays can exit from the side of the substrate facing away from the light-emitting device. In this way, the light extraction efficiency of the display panel can be improved, and further, the brightness of the display panel can be increased without increasing the current, thereby reducing the power consumption of the display panel and increasing the service life of the display panel. In addition, the side of the light-dimming part facing away from the substrate also has a light coupling and extraction structure. When the light rays entering the light-dimming part exit from the side of the light-dimming part facing away from the substrate, diffraction and interference can occur in the light coupling and extraction structure, so that the viewing angle range of the light rays exiting from the light-dimming part is relatively large, and further, the viewing angle of the display panel is relatively wide.

[0094] Please refer to Figure 6 , Figure 6 which is a manufacturing flowchart of a manufacturing method of a display panel provided in an embodiment of the present application.

[0095] Step 601: Form a plurality of pixel circuits, a plurality of light-emitting devices, and a packaging layer on one side of the substrate.

[0096] Please refer to Figure 7 , Figure 7 which is a schematic diagram of a film layer structure for forming a plurality of pixel circuits, a plurality of light-emitting devices, and a packaging layer provided in an embodiment of the present application. It should be noted that Figure 7 the plurality of pixel circuits are not drawn in . On one side of the substrate 100, a plurality of pixel driving circuits, a plurality of light-emitting devices 200, and a packaging layer 400 are sequentially formed in a direction away from the substrate. Among them, the plurality of pixel driving circuits correspond to the plurality of light-emitting devices 200, and the plurality of pixel driving circuits are electrically connected to the plurality of light-emitting devices 200 correspondingly. The packaging layer 400 is a film layer formed by evaporation in one layer, and the packaging layer 400 covers the plurality of light-emitting devices 200. Exemplarily, the substrate 100 can be made of glass.

[0097] Step 602: Form a plurality of first sub-light-dimming parts on the side of the substrate facing away from the light-emitting device.

[0098] In the embodiment of the present application, forming a plurality of first sub-light-dimming parts on the side of the substrate facing away from the light-emitting device may include the following steps:

[0099] Step 6021: Form a light-dimming thin film on the side of the substrate facing away from the light-emitting device.

[0100] Please refer to Figure 8 , Figure 8It is a schematic diagram of a film layer structure for forming a dimming film on a substrate provided by an embodiment of the present application. A dimming film 310a is formed as a whole layer on the side of the substrate 100 facing away from the light-emitting device 200. Exemplarily, the dimming film 310a can be made of photoresist. The photoresist is spin-coated (with a thickness of about 5 to 10 microns) on the substrate 100 and baked at 100 °C for 10 minutes to form the dimming film 310a.

[0101] It should be noted that before forming the dimming film 310a on the side of the substrate 100 facing away from the light-emitting device 200, the substrate 100 needs to be treated with acetone, alcohol, and deionized water in sequence for about 15 minutes, and then dried with nitrogen to keep the substrate 100 clean.

[0102] Step 6022: Pattern the dimming film to form a plurality of dimming columns.

[0103] Please refer to Figure 9 , Figure 9 It is a schematic diagram of a film layer structure for forming a dimming column provided by an embodiment of the present application. A patterning process is performed on the dimming film 310a to form a plurality of columnar dimming columns 310b.

[0104] Exemplarily, the patterning process includes: covering a mask on the dimming film 310a and exposing it to ultraviolet light for 40 seconds. The exposed dimming film 310a is developed with a solution for 4 minutes, and then dried with nitrogen after development to obtain a plurality of dimming columns 310b.

[0105] Step 6023: Heat the plurality of dimming columns to form a plurality of first sub-dimming parts.

[0106] Please refer to Figure 10 , Figure 10 It is a schematic diagram of a film layer structure for forming a first sub-dimming part provided by an embodiment of the present application. The plurality of dimming columns 310b are heated to 125 °C and kept warm for 6 minutes. In this way, under the influence of temperature, the plurality of dimming columns 310b will collapse to a certain extent to form oval first sub-dimming parts 310, and the side of the first sub-dimming part 310 facing away from the substrate 100 is an arc convex surface.

[0107] Step 603: Form an optical coupling output template.

[0108] In the embodiment of the present application, forming the optical coupling output template may include the following steps:

[0109] Step 6031: Form a concave array template.

[0110] Please refer to Figure 11 , Figure 11It is a schematic diagram of a film layer structure for forming a concave array template on a first sub-dimming part provided by an embodiment of the present application. An organic solution is poured on the side of a plurality of first sub-dimming parts 310 facing away from the substrate 100 and cured to form a concave array template 600. Among them, the concave array template 600 has a plurality of arc-shaped grooves O corresponding to the plurality of first sub-dimming parts 310, and the shape of the arc-shaped grooves O on the substrate 100 is oval. Exemplarily, the organic solution can be a polydimethylsiloxane (PDMS) prepolymer solution. The PDMS solution is poured on the substrate 100 with the first sub-dimming parts 310 and cured at 80 °C for 1 hour.

[0111] It should be noted that after forming a plurality of first sub-dimming parts 310, the substrate 100 with the first sub-dimming parts 310 formed thereon is placed in a trimethylchlorosilane (TMCS) atmosphere for 5 minutes to promote soft release during photolithography, so that the concave array template 600 is more easily peeled off from the substrate 100 with the first sub-dimming parts 310 formed thereon.

[0112] Step 6032: Peel the concave array template from the substrate and apply a tensile force to the concave array template.

[0113] Use a fixture to clamp and fix two opposite sides of the concave array template 600, and apply opposite pulling forces to the two clamped and fixed sides of the concave array template 600, that is, apply a tensile force to the concave array template 600, and the stretching amplitude of the concave array template 600 is 20%. Here, the direction of stretching the concave array template 600 is parallel to the long axis direction of the arc-shaped grooves O of the ellipse.

[0114] Step 6033: Etch the side of the concave array template with a plurality of arc-shaped grooves.

[0115] Since the thicknesses of the parts of the concave array template 600 with a plurality of arc-shaped grooves O are different, the deformation amounts of the positions with different thicknesses in the stretched concave array template 600 are different. The deformation amount of the thinner area is larger, and the deformation amount of the thicker position is smaller. Therefore, during the process of etching a plurality of arc-shaped grooves O by oxygen plasma reactive ion etching, the etching degrees of the parts with different thicknesses in the arc-shaped grooves O are different.

[0116] Step 6034: Cancel the tensile force applied to the concave array template to form a plurality of auxiliary grooves in the arc-shaped grooves and obtain an optical coupling output template.

[0117] Please refer to Figure 12 , Figure 12It is a top view of an optical coupling output template provided by an embodiment of the present application. After canceling the tensile force applied to the concave array template 600, since the etching degrees of different parts with different thicknesses in the arc-shaped groove O are different, after canceling the tensile force applied to the concave array template 600, multiple parallel auxiliary grooves O1 are formed in the arc-shaped groove O to obtain the optical coupling output template 700. Among them, the stretching direction of the concave array template 600 is parallel to the extending direction of the auxiliary groove O1.

[0118] Step 604: Form an organic material thin film on the side of the multiple first sub-dimming parts away from the substrate.

[0119] Please refer to Figure 13 , Figure 13 It is a schematic diagram of a film layer structure for forming an organic material thin film provided by an embodiment of the present application. Among them, the organic material thin film 320a covers multiple first sub-dimming parts 310. Exemplarily, the organic material can be a UV resin.

[0120] Step 605: Process the part of the organic material thin film covering the multiple first sub-dimming parts to form multiple second sub-dimming parts.

[0121] The process of processing the part of the organic material thin film 320a covering the multiple first sub-dimming parts 310 may include: buckling the optical coupling output template 700 on the substrate 100 formed with the organic material thin film 320a to press the organic material thin film 320a. In this case, please refer to Figure 14 , Figure 14 It is a schematic diagram for forming a second sub-dimming part provided by an embodiment of the present application. The first sub-dimming part 310 and the second sub-dimming part 320 covering the first sub-dimming part 310 in the organic material thin film 320a are both located in the corresponding arc-shaped groove O, so that the multiple auxiliary grooves O1 in the arc-shaped groove O can press the side of the second dimming part 320 away from the first dimming part 310.

[0122] Remove the optical coupling output template 700 from the substrate 100 to obtain multiple second sub-dimming parts 320 and an auxiliary dimming layer 500. The multiple second sub-dimming parts 320 correspond to the multiple first sub-dimming parts 310. The second sub-dimming part 320 is located on the side of the corresponding first sub-dimming part 310 away from the substrate 100, and an optical coupling output structure 301 on the side of the obtained second sub-dimming part 320 away from the first sub-dimming part 310. Among them, the optical coupling output structure 301 includes multiple parallel linear grooves 301a matching the multiple auxiliary grooves O1. The part of the organic material thin film 320a except for covering the multiple first sub-dimming parts 310 is the auxiliary dimming layer 500, and the auxiliary dimming layer 500 is in direct contact with the side of the substrate 100 away from the light-emitting device 200.

[0123] In summary, for the display panel provided in the embodiment of the present application, when the light emitted by the light-emitting device enters the substrate, since the light-dimming portion is in direct contact with the side of the substrate facing away from the light-emitting device, and the refractive index of the light-dimming portion is greater than that of the substrate. Therefore, the light rays in the light entering the substrate that are incident on the interface between the substrate and the light-dimming portion will not undergo total internal reflection at this interface, but will be refracted into the light-dimming portion, thereby changing the transmission path of the light rays, so that the refracted light rays can exit from the side of the substrate facing away from the light-emitting device. In this way, the light extraction efficiency of the display panel can be improved, and further, the brightness of the display panel can be increased without increasing the current, thereby reducing the power consumption of the display panel and increasing the service life of the display panel. In addition, the side of the light-dimming portion facing away from the substrate further has a light coupling and extraction structure. When the light rays entering the light-dimming portion exit from the side of the light-dimming portion facing away from the substrate, diffraction and interference can occur in the light coupling and extraction structure, so that the viewing angle range of the light rays exiting from the light-dimming portion is relatively large, and further the viewing angle of the display panel is relatively wide.

[0124] The embodiment of the present application further provides a display device, which may include: a power supply component and a display panel. The power supply component in the display device can be used to supply power to the display panel, and the display panel can be the above-mentioned display panel.

[0125] Exemplarily, the display device may be: an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, or any product or component with a display function.

[0126] It should be noted that in the drawings, the dimensions of layers and regions may be exaggerated for clarity of illustration. Moreover, it can be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be an intermediate layer. Additionally, it can be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element, or there may be more than one intermediate layer or element. Further, it can be understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Like reference numerals throughout indicate like elements.

[0127] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "plurality" means two or more, unless otherwise clearly defined.

[0128] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: A substrate, a plurality of light emitting devices and a plurality of dimming units; The plurality of light emitting devices are located on one side of the substrate, and the plurality of light emitting devices are all used to emit light toward one side of the substrate; The plurality of dimming parts are located on a side of the substrate away from the plurality of light-emitting devices, the plurality of dimming parts correspond to the plurality of light-emitting devices, the orthographic projections of the dimming parts on the substrate overlap with the orthographic projections of the corresponding light-emitting devices on the substrate, and the dimming parts are in direct contact with the side of the substrate away from the light-emitting devices; The refractive index of the dimming part is greater than the refractive index of the substrate, and a side of the dimming part away from the substrate has a light outcoupling structure.

2. The display panel according to claim 1, characterized in that: The dimming unit comprises: a first sub-dimming unit and a second sub-dimming unit which are stacked; the second sub-dimming unit covers a side of the first sub-dimming unit which is away from the substrate; Wherein, a side of the second sub-dimming unit away from the first sub-dimming unit has the light out-coupling structure.

3. The display panel according to claim 2, characterized in that: The display panel further includes: an auxiliary dimming layer, the orthographic projection of the auxiliary dimming layer on the substrate does not overlap with the orthographic projections of the plurality of dimming parts on the substrate, and the auxiliary dimming layer is in direct contact with a side of the substrate away from the light-emitting device; Wherein, the refractive index of the auxiliary dimming layer is greater than the refractive index of the substrate.

4. The display panel according to claim 3, characterized in that: The auxiliary dimming layer has a plurality of openings, the plurality of openings correspond to the plurality of dimming units, and the second sub-dimming units in the dimming units are connected to the auxiliary dimming layer at positions corresponding to the openings.

5. The display panel according to claim 4, characterized in that: The second sub-dimming unit and the auxiliary dimming layer are arranged in the same layer and made of the same material.

6. The display panel according to any one of claims 1 to 5, characterized in that: The light outcoupling structure comprises a plurality of linear grooves arranged in parallel.

7. The display panel according to claim 6, characterized in that: The shape of the dimming portion on the substrate is an ellipse, and the major axis direction of the ellipse is parallel to the extending direction of the linear groove.

8. The display panel according to any one of claims 1 to 5 and 7, characterized in that: A surface of the dimming portion facing away from the substrate is an arc-shaped convex surface.

9. The display panel according to claim 8, characterized in that: The plurality of light emitting devices are used to emit white light, or the plurality of light emitting devices include: a plurality of light emitting devices for emitting red light, a plurality of light emitting devices for emitting blue light, and a plurality of light emitting devices for emitting green light.

10. A method for manufacturing a display panel, characterized in that: The method comprises: The plurality of light-emitting devices are formed on one side of the substrate; the plurality of light-emitting devices are all used to emit light toward one side of the substrate; A plurality of dimming parts are formed on a side of the substrate away from the plurality of light-emitting devices; the plurality of dimming parts correspond to the plurality of light-emitting devices, the orthographic projections of the dimming parts on the substrate overlap with the orthographic projections of the corresponding light-emitting devices on the substrate, and the dimming parts are in direct contact with the side of the substrate away from the light-emitting devices; The refractive index of the dimming part is greater than the refractive index of the substrate, and a side of the dimming part away from the substrate has a light outcoupling structure.

11. The manufacturing method according to claim 10, characterized in that: The plurality of dimming units are formed, comprising: forming a plurality of first sub-dimming units on a side of the substrate away from the light-emitting device; Forming an organic material film on a side of the plurality of first sub-dimming parts away from the substrate, wherein the organic material film covers the plurality of first sub-dimming parts; Processing the portion of the organic material film covering the plurality of first sub-dimming parts to form a plurality of second sub-dimming parts; the plurality of second sub-dimming parts correspond to the plurality of first sub-dimming parts, the second sub-dimming parts are located on a side of the corresponding first sub-dimming parts away from the substrate, and a side of the second sub-dimming parts away from the corresponding first sub-dimming parts has the light out-coupling structure; The portion of the organic material film other than that covering the plurality of first sub-dimming units is an auxiliary dimming layer, and the auxiliary dimming layer is in direct contact with a side of the substrate facing away from the light-emitting device.

12. The manufacturing method according to claim 11, characterized in that: Processing a portion of the organic material film covering the plurality of first sub-dimming units to form a plurality of second sub-dimming units, comprising: Providing an optical coupling template; the optical coupling template has a plurality of arc-shaped grooves corresponding to the plurality of first sub-dimming parts, and the arc-shaped grooves have a plurality of auxiliary grooves arranged in parallel; The optical coupling template is buckled onto the substrate formed with the organic material film to press the organic material film; the first sub-dimming portion and the second sub-dimming portion in the organic material film covering the first sub-dimming portion are both located in the corresponding arc-shaped groove, so that the plurality of auxiliary grooves in the arc-shaped groove can press the side of the second dimming portion away from the first dimming portion; The light-outcoupling template is removed from the substrate to obtain the plurality of second sub-dimming units and the auxiliary dimming layer, and the light-outcoupling structure of the second sub-dimming unit is obtained away from the side of the first sub-dimming unit; the light-outcoupling structure includes a plurality of parallel linear grooves that match the plurality of auxiliary grooves.

13. The manufacturing method according to claim 12, characterized in that: The method further comprises: After forming the plurality of first sub-dimming parts, pouring an organic solution on a side of the plurality of first sub-dimming parts away from the substrate and curing the solution to form a concave array template; the concave array template has the plurality of arc-shaped grooves; peeling the concave array template from the substrate and applying a tensile force to the concave array template; Performing etching on one side of the concave array template having the plurality of arc-shaped grooves; canceling the tensile force applied to the concave array template to form a plurality of auxiliary grooves in the arc-shaped groove to obtain the optical coupling template; Wherein, the direction of stretching the concave array template is parallel to the extending direction of the auxiliary grooves.

14. The manufacturing method according to any one of claims 11 to 13, characterized in that: The plurality of first sub-dimming units are formed, comprising: forming a dimming film on a side of the substrate away from the light-emitting device; Performing patterning on the dimming film to form a plurality of dimming columns; The plurality of dimming columns are subjected to a heating process to form the plurality of first dimming sub-units.

15. A display device, characterized in that: The display device comprises: a power supply component and a display panel, the display panel is the display panel according to any one of claims 1 to 9, and the power supply component is used to supply power to the display panel.

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