Display panel, display device and display panel preparation method

Abstract

The invention provides a display panel, a display device and a display panel preparation method, and relates to the technical field of display. The color conversion layers are arranged on the sides, away from the substrate, of the light-emitting devices at intervals, and each color conversion layer corresponds to one light-emitting device. The color film layer is arranged on the sides, away from the substrate, of the multiple color conversion layers, gaps exist between the color film layer and the multiple color conversion layers, a filling space is defined by the substrate, the multiple sub-pixels, the multiple color conversion layers and the color film layer, and the filling space is filled with a scattering layer. Exciting light emitted by the light-emitting device enters the color conversion layers, part of the exciting light is converted into excited light through the color conversion layers to be emitted, and part of the exciting light which is not converted by the color conversion layers is scattered by the scattering layers filled between the color film layer and the multiple color conversion layers and the scattering layers filled between the multiple color conversion layers to return to the color conversion layers and then is converted into excited light through the color conversion layers to be emitted. The thickness of the color conversion layer is small while the light extraction efficiency is guaranteed, and the color conversion layer is easy to prepare in the process.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a display panel, a display device, and a method for manufacturing a display panel. Background Art

[0002] With the development of display technologies, in some fields (such as the AR field and the VR field), the requirements for the resolution of display panels are getting higher and higher. The pixel size of a high-resolution display panel is very small (such as 4 μm), and the pitch between pixels is also very small (such as 2 μm). Generally, in order for the color conversion layer of a display panel to fully perform color conversion on the light emitted by the light-emitting devices, the thickness of the color conversion layer needs to exceed 10 μm. However, currently, it is difficult to achieve a color conversion layer with a thickness exceeding 10 μm in terms of technology. Thus, the currently manufactured display panel cannot fully perform color conversion on the light emitted by the light-emitting devices. Summary of the Invention

[0003] The present application provides a display panel, a display device, and a method for manufacturing a display panel, which are used to solve the problem in the prior art that the display panel cannot fully perform color conversion on the light emitted by the light-emitting devices.

[0004] In a first aspect, the present application provides a display panel, including:

[0005] A substrate;

[0006] A plurality of pixels arranged in an array on the substrate, each pixel including a plurality of sub-pixels arranged at intervals, and each sub-pixel including a light-emitting device disposed on one side of the substrate;

[0007] A plurality of color conversion layers, arranged at intervals on the side of the plurality of light-emitting devices away from the substrate, and each color conversion layer corresponding to one light-emitting device;

[0008] A color filter layer, disposed on the side of the plurality of color conversion layers away from the substrate, and there is a gap between the color filter layer and the plurality of color conversion layers. Among them, the substrate, the plurality of sub-pixels, the plurality of color conversion layers, and the color filter layer enclose a filling space, and a scattering layer is filled in the filling space.

[0009] In a possible implementation manner, the scattering layer includes a plurality of first scattering regions and a plurality of second scattering regions, where each first scattering region is located on the side of one color conversion layer away from the substrate; each second scattering region is located between the gaps of two color conversion layers.

[0010] In a possible implementation manner, each second scattering region includes a curing sub-region.

[0011] In a possible implementation, the color film layer includes a color filter unit for transmitting red light, a color filter unit for transmitting green light, and a color filter unit for transmitting blue light, which are respectively opposite to a plurality of color conversion layers. Among them, the thickness range of the first scattering region between the color filter unit for transmitting red light and the corresponding color conversion layer is 0.5 μm to 1 μm, the thickness range of the first scattering region between the color filter unit for transmitting green light and the corresponding color conversion layer is 0.2 μm to 0.3 μm, and the thickness range of the first scattering region between the color filter unit for transmitting blue light and the corresponding color conversion layer is 0.1 μm to 0.2 μm.

[0012] In a possible implementation, the scattering layer includes a light-transmitting layer and a plurality of scattering particles distributed in the light-transmitting layer.

[0013] In a possible implementation, the concentration range of the scattering particles in the scattering layer is 40% to 70%.

[0014] In a possible implementation, the height of each color conversion layer in the direction perpendicular to the substrate is greater than 3 μm and less than 6 μm.

[0015] In a possible implementation, the display panel further includes a plurality of metal isolation layers. The orthographic projection of each metal isolation layer on the substrate is an annular first projection region, and the orthographic projection of the light-emitting device of each sub-pixel on the substrate is a second projection region, and the second projection region is located within the first projection region.

[0016] In a possible implementation, the display panel further includes a dielectric film. The dielectric film is located between the plurality of light-emitting devices and the plurality of color conversion layers, and in the direction perpendicular to the substrate, the refractive index of the dielectric film increases from the side close to the substrate to the side far from the substrate.

[0017] In a possible implementation, the refractive index of the dielectric film changes from 1.4 to 2.5 from the side close to the substrate to the side far from the substrate.

[0018] In a possible implementation, the display panel further includes a grating structure layer. The grating structure layer is located between the plurality of light-emitting devices and the plurality of color conversion layers, and the grating structure layer is used to transmit the excitation light emitted by the plurality of light-emitting devices and is used to reflect the excited light converted by the plurality of color conversion layers.

[0019] In a possible implementation, the display panel further includes a plurality of convex lenses, and one convex lens is disposed between each light-emitting device and the color conversion layer. Each convex lens is used to converge the excitation light emitted by the light-emitting device onto the color conversion layer.

[0020] In a second aspect, the present application further provides a display device, including the display panel provided in the first aspect of the present application.

[0021] In a third aspect, the present application further provides a method for manufacturing a display panel, the method including:

[0022] Forming a plurality of pixels arranged in an array on a substrate, wherein each pixel includes a plurality of sub-pixels arranged at intervals, and each sub-pixel includes a light-emitting device disposed on one side of the substrate;

[0023] Forming a plurality of color conversion layers arranged at intervals on the side of the plurality of light-emitting devices away from the substrate, wherein each color conversion layer corresponds to one light-emitting device;

[0024] Forming a scattering layer on the side of the plurality of color conversion layers away from the substrate and between the plurality of color conversion layers;

[0025] Forming a color filter layer on the side of the scattering layer away from the substrate.

[0026] In a third aspect, the present application further provides a method for manufacturing a display panel, including:

[0027] Forming a plurality of pixels arranged in an array on a substrate, wherein each pixel includes a plurality of sub-pixels, and each sub-pixel includes a light-emitting device disposed on one side of the substrate;

[0028] Forming a scattering layer on the side of the plurality of light-emitting devices away from the substrate and between the plurality of light-emitting devices;

[0029] Forming a plurality of cured sub-regions arranged at intervals in the scattering layer;

[0030] Printing a color conversion layer between every two cured sub-regions, wherein each color conversion layer corresponds to one light-emitting device;

[0031] Forming a color filter layer on the side of the scattering layer away from the substrate.

[0032] For a display panel, a display device, and a method for manufacturing a display panel provided by the present application, since a plurality of color conversion layers are arranged at intervals on the side of the plurality of light-emitting devices away from the substrate, and each color conversion layer corresponds to one light-emitting device; the color filter layer is arranged at intervals on the side of the plurality of color conversion layers away from the substrate. Among them, the substrate, the plurality of sub-pixels, the plurality of color conversion layers, and the color filter layer enclose a filling space, and the filling space is filled with a scattering layer. It can be understood that since there is a gap between the color filter layer and the plurality of color conversion layers; thus, the scattering layer is filled between the color filter layer and the plurality of color conversion layers, and since there are gaps between the plurality of color conversion layers, the scattering layer is also filled between the plurality of color conversion layers.

[0033] In this way, the excitation light emitted by the light-emitting device enters the color conversion layer. Part of it is converted into the excited light and emitted by the color conversion layer, and part of the excitation light that is not converted by the color conversion layer is scattered back to the color conversion layer by the scattering layer filled between the color filter layer and the multiple color conversion layers and the scattering layer filled between the multiple color conversion layers, and then is converted into the excited light and emitted by the color conversion layer. In this way, even when the thickness of the color conversion layer is small, the excitation light emitted by the light-emitting device can be fully color-converted, ensuring the light extraction efficiency. Moreover, the color conversion layer with a small thickness is easy to fabricate in the process, saving the manufacturing cost. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 One of the cross-sectional views of the display panel provided by the embodiment of the present application;

[0036] Figure 2 The specific structural schematic diagram of the scattering layer provided by the embodiment of the present application;

[0037] Figure 3 Another cross-sectional view of the display panel provided by the embodiment of the present application;

[0038] Figure 4 Another cross-sectional view of the display panel provided by the embodiment of the present application;

[0039] Figure 5 The schematic diagram of the light transmission in the dielectric film provided by the embodiment of the present application;

[0040] Figure 6 Another cross-sectional view of the display panel provided by the embodiment of the present application;

[0041] Figure 7 Another cross-sectional view of the display panel provided by the embodiment of the present application;

[0042] Figure 8 One of the flowcharts of the method for manufacturing the display panel provided by the embodiment of the present application;

[0043] Figure 9 Another flowchart of the method for manufacturing the display panel provided by the embodiment of the present application;

[0044] Figure 10 Another flowchart of the method for manufacturing the display panel provided by the embodiment of the present application;

[0045] Figure 11 This is the fourth flowchart of the display panel manufacturing method provided by the embodiments of the present application. Detailed implementation manners

[0046] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts of the present disclosure.

[0047] Various schematic structural diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may actually deviate due to manufacturing tolerances or technical limitations. Those skilled in the art can additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0048] In the context of the present disclosure, when a layer / element is referred to as being "on" another layer / element, the layer / element can be directly on the other layer / element, or there can be an intermediate layer / element between them. Additionally, if a layer / element is "on" another layer / element in one orientation, then when the orientation is reversed, the layer / element can be "under" the other layer / element.

[0049] With the development of display technology, the requirements for the resolution of display panels are getting higher and higher. The pixel size of a high-resolution display panel is very small (such as 4 μm), and the pitch between pixels is also very small (such as 2 μm). Generally, in order for the color conversion layer of a display panel to sufficiently perform color conversion on the light emitted by the light-emitting device, the thickness of the color conversion layer needs to exceed 10 μm. However, currently, it is difficult to achieve a color conversion layer with a thickness exceeding 10 μm in terms of process. Thus, the currently manufactured display panel cannot sufficiently perform color conversion on the light emitted by the light-emitting device.

[0050] Based on the above technical problems, the inventive concept of the present application lies in: on the side of a plurality of light-emitting devices away from the substrate, a plurality of color conversion layers are arranged at intervals, and each color conversion layer corresponds to one light-emitting device. A color film layer is arranged on the side of the plurality of color conversion layers away from the substrate, and there is a gap between the color film layer and the plurality of color conversion layers. A filling space is formed by the substrate, a plurality of sub-pixels, a plurality of color conversion layers and the color film layer, and a scattering layer is filled in the filling space. Among them, the excitation light emitted by the light-emitting device enters the color conversion layer, and part of it is converted into excited light by the color conversion layer and exits, while part of the excitation light that is not converted by the color conversion layer can be scattered back to the color conversion layer by the scattering layer and then converted into excited light by the color conversion layer and exits. In this way, even when the thickness of the color conversion layer is small, the excitation light emitted by the light-emitting device can be fully color-converted, ensuring the light extraction efficiency, and the color conversion layer with a small thickness is easy to fabricate in the process, saving the manufacturing cost.

[0051] Next, specific embodiments will be used to detail the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0052] Please refer to Figure 1 , the embodiment of the present application provides a display panel with a relatively high resolution. For example, the resolution of the display panel is greater than 1000. Specifically, the display panel includes:

[0053] A substrate 101, the substrate 101 can be but is not limited to a flexible substrate, and the flexible substrate can include a silicon substrate, a polyethylene terephthalate (PET) substrate, a polyethylene naphthalate two formic acid glycol ester (PEN) substrate, or a colorless polyimide (CPI), etc. It can be understood that the substrate 101 is used to support and protect the entire display panel.

[0054] It should be noted that the substrate 101 can be a single-layer structure or a multi-layer structure. For example, the substrate 101 can include a glass substrate, or the substrate 101 can also include at least one flexible substrate and at least one buffer layer, and the flexible substrate and the buffer layer are alternately stacked. The embodiments of the present application do not limit this.

[0055] A plurality of pixels arranged in an array on a substrate 101, each pixel including a plurality of sub-pixels arranged at intervals, and each sub-pixel including a light-emitting device 102 disposed on one side of the substrate 101. Each sub-pixel can display a single color. For example, a red sub-pixel displays red, a green sub-pixel displays green, and a blue sub-pixel displays blue. The brightness (gray scale) of sub-pixels of different colors in each pixel can be adjusted, and a variety of colors can be displayed through color combination and superposition, thereby achieving full-color display.

[0056] The light-emitting device 102 is used to emit excitation light. For example, the light-emitting device 102 can be a micro LED that can emit blue light (i.e., excitation light). The length range of the micro LED can be, but is not limited to, 4μm to 10μm, the thickness range can be, but is not limited to, 0.8μm to 2μm, the display brightness range can be, but is not limited to, 1000 nit to 500 nit, the blue light peak position range can be, but is not limited to, 460nm to 480nm, and the full width at half maximum range can be, but is not limited to, 15nm to 30nm.

[0057] Optionally, the display panel further includes a plurality of metal isolation layers 112. Exemplarily, the thickness range of the metal isolation layer 112 can be, but is not limited to, 100nm to 500nm. The material of the metal isolation layer 112 can be MO, Al, Ag, etc., which is not limited herein.

[0058] The orthographic projection of each metal isolation layer 112 on the substrate 101 is a circular first projection area, and the orthographic projection of the light-emitting device 102 of each sub-pixel on the substrate 101 is a second projection area, and the second projection area is located within the first projection area. Since the second projection area corresponding to the light-emitting device 102 of the sub-pixel is located within the corresponding first projection area, the metal isolation layer 112 can effectively block the excitation light emitted by the corresponding light-emitting device 102 from being transmitted to the position where another light-emitting device 102 is located, so as to avoid interference between the excitation lights emitted by each light-emitting device 102, and enable the excitation light of each light-emitting device 102 to be output from the direction facing the corresponding color conversion layer 103.

[0059] A plurality of color conversion layers 103 are disposed at intervals on a side of a plurality of light-emitting devices 102 away from the substrate 101, and each color conversion layer 103 corresponds to one light-emitting device 102. Exemplarily, the color conversion layer may be a quantum dot QD layer or a phosphor layer, etc. For example, when the color conversion layer 103 is a QD layer, it can be prepared by exposure or printing. In the initial process of preparing the QD layer, the width of the QD layer is large and the thickness is very low. Furthermore, by means of thermal reflux, the width of the QD layer can be shrunk and the thickness can be increased, and the shape of the QD layer on the side away from the substrate 101 is arc-shaped, and the width range of the prepared QD layer is 3.5 μm to 9.5 μm. For example, the width of the QD layer can be 3.5 μm, 6 μm, or 9.5 μm, etc., which is not limited herein.

[0060] Among them, the height of the QD layer (i.e., the color conversion layer 103) in the direction perpendicular to the substrate 101 is greater than 3 μm and less than 6 μm. For example, the height of the QD layer in the direction perpendicular to the substrate 101 can be 3 μm, 5 μm, or 6 μm. It can be understood that in the process of preparing the above QD layer, the process is simple and the manufacturing cost is low.

[0061] Specifically, the plurality of color conversion layers 103 can convert the excitation light from the light-emitting devices 102 into excited light. For example, the plurality of color conversion layers 103 can include multiple groups of color conversion layers 103 that are periodically arranged in sequence to convert the excitation light into red light (i.e., the excited light), color conversion layers 103 that convert the excitation light into green light (i.e., the excited light), and color conversion layers 103 that convert the excitation light into blue light (i.e., the excited light).

[0062] Optionally, a planarization layer 113 may be further disposed between the light-emitting device 102 and the color conversion layer 103. Among them, the planarization layer 113 may be, but is not limited to, an epoxy resin layer, an acrylic resin layer, etc., and the thickness range of the planarization layer 113 may be, but is not limited to, 1.5 μm to 3 μm.

[0063] A color film layer 108 is disposed on a side of the plurality of color conversion layers 103 away from the substrate 101, and there is a gap between the color film layer 108 and the plurality of color conversion layers 103.

[0064] The display panel provided by the embodiment of the present application further includes: a color film layer 108 disposed on a side of the scattering layer 104 away from the substrate 101, wherein the color film layer 108 includes a color filter unit 106 facing the color conversion layer 103 and a black matrix 107 disposed between adjacent color filter units 106.

[0065] In the embodiments of the present application, the thickness range of the color film layer 108 can be, but is not limited to, 1.0 μm to 1.2 μm, and no limitation is made herein. Among them, the black matrix 107 can also reflect the excitation light from the scattering layer 104 to the color conversion layer, so that the excitation light that has not been converted by the color conversion layer enters the color conversion layer again for color conversion, which can improve the light extraction efficiency. In addition, the black matrix 107 can also be used to block the halos at the edges of the respective color filter units 106.

[0066] Further, a filling space is defined by the substrate 101, a plurality of sub-pixels, a plurality of color conversion layers 103, and the color film layer 109, and the scattering layer 104 is filled in the filling space.

[0067] It can be understood that there is a gap between the color film layer 109 and the plurality of color conversion layers 103; thus, the scattering layer 104 is filled between the color film layer 103 and the plurality of color conversion layers 103, and since there are gaps between the plurality of color conversion layers 103, the scattering layer 104 is also filled between the plurality of color conversion layers 103.

[0068] In this way, the excitation light emitted by the light-emitting device 102 enters the color conversion layer 103, part of which is converted into excited light by the color conversion layer 103 and exits, and part of the excitation light that has not been converted by the color conversion layer 103 is scattered back to the color conversion layer 103 by the scattering layer 104 filled between the color film layer 108 and the plurality of color conversion layers 103 and the scattering layer 104 filled between the plurality of color conversion layers 103, and then is converted into excited light by the color conversion layer 103 and exits.

[0069] Exemplarily, still as Figure 1 shown, the scattering layer 104 includes a plurality of first scattering regions and a plurality of second scattering regions. Among them, each first scattering region is located on the side of a color conversion layer 103 away from the substrate 101; each second scattering region is located between the gaps of two color conversion layers 103. It can be understood that the first scattering region can scatter the light output from the side of the color conversion layer 103 away from the substrate 101, and the second scattering region can scatter the light output from the direction between the gaps of two color conversion layers 103.

[0070] In addition, since the second scattering region is located between any two color conversion layers 103. It can be understood that the scattering particles 201 in the second scattering region can reflect the excited light output by the color conversion layer 103 to a certain extent, and can avoid crosstalk between the excited lights output by two adjacent color conversion layers 103.

[0071] Exemplarily, as Figure 2As shown, the scattering layer 104 includes a light-transmitting layer 202 and a plurality of scattering particles 201 distributed within the scattering layer 104. The scattering particles 201 can be a TiO2 layer or the like. Among them, the light-transmitting layer 202 can be an acrylic resin material layer or an epoxy resin material layer, which is not limited herein. It can be understood that when the excitation light or the excited light irradiates on the scattering layer 104, the scattering particles 201 in the scattering layer 104 have a reflection effect on the excitation light or the excited light, and the light-transmitting layer 202 in the scattering layer 104 has a transmission effect on the excitation light or the excited light. Also, since the excitation light or the excited light irradiates on each scattering particle 201 in different directions, the scattering layer 104 has the ability to scatter the excitation light or the excited light in all directions.

[0072] In some embodiments, the concentration range of the scattering particles 201 in the scattering layer 104 is 40% - 70%. In this way, the ratio of the light transmitted by the scattering layer 104 and the light reflected by it can be made more reasonable. For example, the concentration of the scattering particles 201 can be 40%, 60% or 70%, which is not limited herein.

[0073] In summary, for a display panel provided by an embodiment of the present application, due to a plurality of color conversion layers 103, which are arranged at intervals on the side of a plurality of light-emitting devices 102 away from the substrate 101, and each color conversion layer 103 corresponds to one light-emitting device 102; a color filter layer 108 is arranged at intervals on the side of the plurality of color conversion layers 103 away from the substrate 101. Among them, the substrate 101, a plurality of sub-pixels, a plurality of color conversion layers 103, and the color filter layer 108 enclose a filling space, and the filling space is filled with a scattering layer 104. Among them, the excitation light emitted by the light-emitting device 102 enters the color conversion layer 103, and part of it is converted into excited light and emitted by the color conversion layer 103, while part of the excitation light that is not converted by the color conversion layer 103 can be scattered by the scattering layer 104 and returned to the color conversion layer 103, and then converted into excited light and emitted by the color conversion layer 103. In this way, even when the thickness of the color conversion layer 103 is small (for example, the height range of the color conversion layer 103 is 3μm - 6μm), the excitation light emitted by the light-emitting device 102 can be fully color-converted, ensuring the light extraction efficiency, and the color conversion layer 103 with a small thickness is easy to fabricate in the process, saving the manufacturing cost.

[0074] In some other embodiments, as Figure 3 shown, each second scattering region includes a curing sub-region 301. At this time, the process steps of forming the scattering layer 104 can be before the process steps of forming the color conversion layer 103.

[0075] Exemplarily, a scattering layer 104 may be coated on a side of the light emitting device 102 away from the base substrate 101, and then ultraviolet light may be used to irradiate the scattering layer 104 at a preset distance, so that the scattering layer 104 forms spaced solidified sub-regions 301. Next, the color transfer layer 103 may be prepared by printing ink between two spaced solidified sub-regions 301, and each adjacent two solidified sub-regions 301 limit the position of the ink that can be printed. Moreover, as the depth of the scattering layer 104 increases, the intensity of ultraviolet light decreases, and the scattering region of the scattering layer 104 closer to the light emitting device 102 has better fluidity. In this way, when the printed color transfer layer 103 moves toward the side close to the light emitting device 102, the scattering region of the scattering layer 104 close to the light emitting device 102 may be squeezed to both sides of the light emitting device 102, forming a color transfer layer 103 with a fixed morphology.

[0076] like Figure 4 As shown, in Figure 2 On the basis of the corresponding embodiment, the display panel further includes a dielectric film 109, which is located between the plurality of light-emitting devices 102 and the plurality of color conversion layers 103, and in the direction perpendicular to the base substrate 101, the refractive index of the dielectric film 109 changes from low to high from the side close to the base substrate 101 to the side far from the base substrate 101. As the light is transmitted from the optically dense medium with a large refractive index to the optically sparse medium with a small refractive index, the refraction angle becomes larger. In this way, the refraction angle of the excitation light or the excited light scattered by the scattering layer 104 to the dielectric film 109 gradually increases until it is totally reflected back to the scattering layer 104, and is scattered by the scattering layer 104 again to the color filter layer 108 for output, thereby improving the light output efficiency.

[0077] Specifically, the refractive index of the dielectric film 109 from the side close to the substrate 101 to the side away from the substrate 101 can vary from 1.4 to 2.5. Figure 5As shown, the dielectric film 109 may include a plurality of dielectric layers, and the refractive index of the plurality of dielectric layers increases from the side close to the substrate 101 to the side far from the substrate 101. For example, the plurality of dielectric layers from the side close to the substrate 101 to the side far from the substrate 101 may be, in sequence, an SiNx layer 501, a first SiCNx layer 502, an SiO2 layer 503, a TiO2 layer 504, an ALO2 layer 505, and a second SiCNx layer 506. Among them, the refractive index of the SiNx layer 501 may be 1.4, the refractive index of the first SiCNx layer 502 may be 1.7, the refractive index of the TiO2 layer 503 may be 2.0, the refractive index of the ALO2 layer 504 may be 2.3, and the second SiCNx layer 505 may be 2.5. Alternatively, the dielectric film 109 may also be a single material layer with a refractive index changing from 1.4 to 2.5 from the side close to the substrate 101 to the side far from the substrate 101, which is not limited herein.

[0078] As Figure 6 shown, the display panel further includes a grating structure layer 110. The grating structure layer 110 is located between the plurality of light-emitting devices 102 and the plurality of color conversion layers 103, and the grating structure layer 110 is configured to transmit the excitation light emitted by the plurality of light-emitting devices 102 and to reflect the excited light converted by the plurality of color conversion layers 103. It can be understood that the region of the grating structure layer 110 corresponding to the color conversion layer that converts red light can block red light (i.e., the excited light), the region of the grating structure layer 110 corresponding to the color conversion layer that converts green light can block green light (i.e., the excited light), and the region of the grating structure layer 110 corresponding to the color conversion layer that converts blue light can block the blue light excited by the color conversion layer (i.e., the excited light). In this way, the excited light can be reflected back to the scattering layer 104 by the grating structure and be scattered again by the scattering layer 104 to the color filter layer 108 for output, improving the light extraction efficiency.

[0079] As Figure 7 shown, the display panel further includes a plurality of convex lenses 111, and a convex lens 111 is disposed between each light-emitting device 102 and the color conversion layer 103. Each convex lens 111 is configured to converge the excitation light emitted by the light-emitting device 102 onto the color conversion layer 103. In this way, the color conversion layer 103 can more efficiently convert the excitation light into the excited light, thereby further improving the light extraction efficiency of the display panel.

[0080] In addition, in some embodiments, the color filter units 106 facing the color conversion layer 103 include color filter units 106 that transmit red light, color filter units 106 that transmit green light, and color filter units 106 that transmit blue light. Since the transmittance of light with different wavelengths in the same medium is different, the longer the wavelength, the higher the transmittance, and the greater the thickness of the scattering layer 104, the smaller the transmittance. The wavelength of red light is greater than that of green light, and the wavelength of green light is greater than that of blue light. Therefore, the thickness range of the scattering region where the scattering layer 104 is located between the color filter unit 106 that transmits red light and the corresponding color conversion layer 103 can be 0.5 μm to 1 μm. In this way, the transmittance of the scattering region where the scattering layer 104 is located between the color filter unit 106 that transmits red light and the corresponding color conversion layer 103 to red light (i.e., the excited light) can be high, and the blue light (i.e., the excitation light) emitted by the emitting device is reflected to the color conversion layer 103 for multiplexing, which can improve the light extraction efficiency. The thickness range of the scattering region where the scattering layer 104 is located between the color filter unit 106 that transmits green light and the corresponding color conversion layer 103 can be 0.2 μm to 0.3 μm. In this way, the transmittance of the scattering region where the scattering layer 104 is located between the color filter unit 106 that transmits red light and the corresponding color conversion layer 103 to green light (i.e., the excited light) can be high, and the blue light (i.e., the excitation light) emitted by the light-emitting device 102 is reflected to the color conversion layer 103 for multiplexing, which can improve the light extraction efficiency. The thickness range of the scattering region where the scattering layer 104 is located between the color filter unit 106 that transmits blue light and the corresponding color conversion layer 103 can be 0.1 μm to 0.2 μm. In this way, the transmittance of the scattering region where the scattering layer 104 is located between the color filter unit 106 that transmits red light and the corresponding color conversion layer 103 to the blue light (i.e., the excited light) converted by the color conversion layer 103 can be high, and the blue light (i.e., the excitation light) emitted by the light-emitting device 102 is reflected to the color conversion layer 103 for multiplexing, which can improve the light extraction efficiency.

[0081] In addition, the embodiment of the present application also provides a display device, including the display panel provided in the first aspect of the present application. Among them, the display device can be, but is not limited to, a mobile phone, a tablet, an AR device, or a VR device, etc., which is not limited herein.

[0082] In addition, as Figure 8 shown, the embodiment of the present application also provides a method for manufacturing a display panel. It should be noted that the basic principle and the technical effects generated by the method for manufacturing a display panel provided in the embodiment of the present application are the same as those of the above embodiments. For a brief description, for the parts not mentioned in the embodiment of the present application, reference can be made to the corresponding content in the above embodiments. Specifically, the method for manufacturing a display panel provided in the embodiment of the present application includes:

[0083] S801: As Figure 9As shown in (a) and (b) therein, a plurality of pixels arranged in an array are formed on a substrate 101, wherein each pixel includes a plurality of sub-pixels arranged at intervals, and each sub-pixel includes a light-emitting device 102 disposed on one side of the substrate 101.

[0084] Optionally, as Figure 9 shown in (c) therein, a metal isolation layer 112 can also be formed around the light-emitting device 102 and a planarization layer 113 can be formed on the side of the light-emitting device 102 away from the substrate 101.

[0085] S802: As Figure 9 shown in (d) therein, on the side of the plurality of light-emitting devices 102 away from the substrate 101, a plurality of color conversion layers 103 arranged at intervals are formed, wherein each color conversion layer 103 corresponds to one light-emitting device 102.

[0086] S803: As Figure 9 shown in (e) therein, a scattering layer 104 is formed on the side of the plurality of color conversion layers 103 away from the substrate 101 and between the plurality of color conversion layers.

[0087] S804: As Figure 9 shown in (f) therein, a color film layer 108 is formed on the side of the scattering layer 104 away from the substrate 101, wherein the color film layer 108 includes a black matrix 107 and a color filter unit 106 facing the color conversion layer 103.

[0088] In addition, as Figure 10 shown, an embodiment of the present application also provides a method for manufacturing a display panel. It should be noted that the basic principle and the technical effects generated by the method for manufacturing a display panel provided by the embodiment of the present application are the same as those of the above embodiment. For the sake of brief description, for the parts not mentioned in the embodiment of the present application, reference can be made to the corresponding content in the above embodiment. Specifically, the method for manufacturing a display panel provided by the embodiment of the present application includes:

[0089] S1001: As Figure 11 shown in (a) and (b) therein, a plurality of pixels arranged in an array are formed on a substrate 101, wherein each pixel includes a plurality of sub-pixels, and each sub-pixel includes a light-emitting device 102 disposed on one side of the substrate 101.

[0090] As Figure 11 shown in (c) therein, a metal isolation layer 112 can also be formed around the light-emitting device 102 and a planarization layer 113 can be formed on the side of the light-emitting device 102 away from the substrate 101.

[0091] S1002: As Figure 11As shown in (d), a scattering layer 104 is formed on the side of the plurality of light-emitting devices 102 away from the substrate 101 and between the plurality of light-emitting devices 102.

[0092] S1003: As Figure 11 shown in (e), a plurality of curing sub-regions 301 are formed in the scattering layer 104 at intervals.

[0093] S1004: As Figure 11 shown in (f), a color conversion layer 103 is printed between every two curing sub-regions 301, where each color conversion layer 103 corresponds to one light-emitting device 102.

[0094] Exemplarily, the specific implementation manners of the above S1002 - S1004 can be as follows: The scattering layer 104 can be coated on the side of the light-emitting device 102 away from the substrate 101. Then, the scattering layer 104 can be irradiated at preset intervals by using ultraviolet light irradiation, so that the scattering layer 104 forms curing sub-regions 301 arranged at intervals. Next, the color conversion layer 103 can be printed in the form of ink between two curing sub-regions 301 arranged at intervals, and every two adjacent curing sub-regions 301 can limit the position where the ink can be printed. Moreover, as the depth of the scattering layer 104 increases, the light intensity of the ultraviolet light weakens, and the fluidity of the scattering region of the scattering layer 104 closer to the light-emitting device 102 is better. In this way, when the printed color conversion layer 103 moves toward the side closer to the light-emitting device 102, it can squeeze the scattering region of the scattering layer 104 closer to the light-emitting device 102 to both sides of the light-emitting device 102, forming a color conversion layer 103 with a fixed morphology.

[0095] S1005: As Figure 11 shown in (g), a color film layer 108 is formed on the side of the scattering layer 104 away from the substrate 101, where the color film layer 108 includes a black matrix 107 and color filter units 106 facing the color conversion layer 103.

[0096] It can be understood that Figure 10 the corresponding display panel preparation method is different from Figure 8 the corresponding display panel preparation method in that Figure 10 in the corresponding display panel preparation method, the process step of preparing the color conversion layer 103 is after the process step of preparing the scattering layer 104, while Figure 8 in the corresponding display panel preparation method, the process step of preparing the color conversion layer 103 is before the process step of preparing the scattering layer 104.

[0097] In the above description, technical details such as the composition of each layer are not elaborated in detail. However, those skilled in the art should understand that various technical means can be used to form layers, regions, etc. of the required shapes. Additionally, in order to form the same structure, those skilled in the art can also design methods that are not exactly the same as the methods described above. Moreover, although the embodiments are described separately above, this does not mean that the measures in each embodiment cannot be used in combination advantageously.

[0098] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications that fall within the scope of the present application.

[0099] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that, the display panel includes: a substrate; a plurality of pixels arranged in an array on the substrate, each pixel including a plurality of sub-pixels arranged at intervals, and each sub-pixel including a light-emitting device disposed on one side of the substrate; a plurality of color conversion layers, disposed at intervals on the side of the plurality of light-emitting devices away from the substrate, and each color conversion layer corresponding to one of the light-emitting devices; a color film layer, disposed on the side of the plurality of color conversion layers away from the substrate, and there is a gap between the color film layer and the plurality of color conversion layers. Wherein, the substrate, the plurality of sub-pixels, the plurality of color conversion layers, and the color film layer enclose a filling space, and a scattering layer is filled in the filling space.

2. The display panel according to claim 1, characterized in that, the scattering layer includes a plurality of first scattering regions and a plurality of second scattering regions. Wherein, each first scattering region is located on the side of one color conversion layer away from the substrate; each second scattering region is located between the gaps of two color conversion layers.

3. The display panel according to claim 2, characterized in that, each second scattering region includes a cured sub-region.

4. The display panel according to claim 2, characterized in that, the color film layer includes a color filter unit for transmitting red light, a color filter unit for transmitting green light, and a color filter unit for transmitting blue light respectively facing the plurality of color conversion layers. Wherein, the thickness range of the first scattering region located between the color filter unit for transmitting red light and the corresponding color conversion layer is 0.5 μm to 1 μm, the thickness range of the first scattering region located between the color filter unit for transmitting green light and the corresponding color conversion layer is 0.2 μm to 0.3 μm, and the thickness range of the first scattering region located between the color filter unit for transmitting blue light and the corresponding color conversion layer is 0.1 μm to 0.2 μm.

5. The display panel according to claim 1, characterized in that, the scattering layer includes a light-transmitting layer and a plurality of scattering particles distributed in the light-transmitting layer.

6. The display panel according to claim 5, characterized in that, the concentration range of the scattering particles in the scattering layer is 40% to 70%.

7. The display panel according to claim 1, characterized in that, the height of each color conversion layer in the direction perpendicular to the substrate is greater than 3 μm and less than 6 μm.

8. The display panel according to claim 1, characterized in that, the display panel further includes a plurality of metal isolation layers. The orthographic projection of each metal isolation layer on the substrate is a circular first projection region, and the orthographic projection of the light-emitting device of each sub-pixel on the substrate is a second projection region, and the second projection region is located within the first projection region.

9. The display panel according to claim 1, characterized in that, The display panel further includes a dielectric film, which is located between the plurality of light-emitting devices and the plurality of color conversion layers. In the direction perpendicular to the substrate, the refractive index of the dielectric film increases from the side close to the substrate to the side far from the substrate.

10. The display panel according to claim 9, wherein, the refractive index of the dielectric film varies from 1.4 to 2.5 from the side close to the substrate to the side far from the substrate.

11. The display panel according to claim 1, wherein, the display panel further includes a grating structure layer, which is located between the plurality of light-emitting devices and the plurality of color conversion layers. The grating structure layer is configured to transmit the excitation light emitted by the plurality of light-emitting devices and to reflect the excited light converted by the plurality of color conversion layers.

12. The display panel according to claim 1, wherein, the display panel further includes a plurality of convex lenses, and one convex lens is disposed between each light-emitting device and the color conversion layer. Each convex lens is configured to converge the excitation light emitted by the light-emitting device onto the color conversion layer.

13. A display device, wherein, it includes the display panel according to any one of claims 1-12.

14. A method for manufacturing a display panel, wherein, the method includes: forming a plurality of pixels arranged in an array on a substrate, wherein each pixel includes a plurality of sub-pixels arranged at intervals, and each sub-pixel includes a light-emitting device disposed on one side of the substrate; forming a plurality of color conversion layers arranged at intervals on the side of the plurality of light-emitting devices far from the substrate, wherein each color conversion layer corresponds to one of the light-emitting devices; forming a scattering layer on the side of the plurality of color conversion layers far from the substrate and between the plurality of color conversion layers; forming a color filter layer on the side of the scattering layer far from the substrate.

15. A method for manufacturing a display panel, wherein, the method includes: forming a plurality of pixels arranged in an array on a substrate, wherein each pixel includes a plurality of sub-pixels, and each sub-pixel includes a light-emitting device disposed on one side of the substrate; forming a scattering layer on the side of the plurality of light-emitting devices far from the substrate and between the plurality of light-emitting devices; forming a plurality of solidified sub-regions arranged at intervals in the scattering layer; printing a color conversion layer between every two of the solidified sub-regions, wherein each color conversion layer corresponds to one of the light-emitting devices; forming a color filter layer on the side of the scattering layer far from the substrate.

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