Display panel, display device, and display panel manufacturing method

Abstract

The application provides a display panel, a display device and a display panel preparation method, and relates to the technical field of display. Due to the multiple color conversion layers, the multiple light emitting devices are arranged at the side away from the substrate base plate, and each color conversion layer corresponds to one light emitting device. The color film layer is arranged at the side away from the substrate base plate of the multiple color conversion layers, and the color film layer and the multiple color conversion layers have a gap. The substrate base plate, the multiple sub-pixels, the multiple color conversion layers and the color film layer enclose a filling space, and the filling space is filled with a scattering layer. The excitation light emitted by the light emitting device enters the color conversion layer, part of which is converted into the excited light and is emitted, and part of the excitation light which is not converted by the color conversion layer is scattered by the scattering layer filled between the color film layer and the multiple color conversion layers and the scattering layer filled between the multiple color conversion layers and returns to the color conversion layer, and then is converted into the excited light and is emitted. The thickness of the color conversion layer is small, and the color conversion layer is easy to prepare in the process while ensuring the light emitting efficiency.

Description

TECHNICAL FIELD

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

[0002] With the development of display technology, the resolution of display panels is increasingly required in some fields (such as AR field and VR field). The pixel size of high-resolution display panels is very small (such as 4 μm), and the spacing between pixels is also very small (such as 2 μm). Generally, the color conversion layer of the display panel needs to be more than 10 μm in thickness in order to fully convert the light emitted by the light emitting device. However, it is difficult to realize the process of preparing a color conversion layer with a thickness of more than 10 μm at present. Therefore, the display panel prepared at present cannot fully convert the light emitted by the light emitting device. SUMMARY

[0003] The present application provides a display panel, a display device and a display panel preparation method, which are used to solve the problem that the display panel cannot fully convert the light emitted by the light emitting device in the prior art.

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

[0005] a substrate substrate;

[0006] a plurality of pixels arranged in an array on the substrate substrate, each pixel comprising a plurality of sub-pixels arranged at intervals, each sub-pixel comprising a light emitting device arranged on one side of the substrate 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 substrate, and each color conversion layer corresponding to one light emitting device;

[0008] a color film layer arranged on the side of the plurality of color conversion layers away from the substrate substrate, and the color film layer and the plurality of color conversion layers having a gap therebetween, wherein the substrate substrate, the plurality of sub-pixels, the plurality of color conversion layers and the color film layer enclose a filling space, and the filling space is filled with a scattering layer.

[0009] In a possible implementation, the scattering layer comprises 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 substrate; and each second scattering region is located between the gap between two color conversion layers.

[0010] In a possible implementation, each second scattering region comprises a solidified sub-region.

[0011] In a possible implementation, the color filter 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 the plurality of color conversion layers, wherein a thickness of the first scattering region between the color filter unit for transmitting red light and the corresponding color conversion layer ranges from 0.5 μm to 1 μm, a thickness of the first scattering region between the color filter unit for transmitting green light and the corresponding color conversion layer ranges from 0.2 μm to 0.3 μm, and a thickness of the first scattering region between the color filter unit for transmitting blue light and the corresponding color conversion layer ranges from 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, a concentration of the scattering particles in the scattering layer ranges from 40% to 70%.

[0014] In a possible implementation, a height of each color conversion layer in a 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, a footprint of each metal isolation layer on the substrate is a first projection region in a shape of a ring, a footprint of each light emitting device on the substrate is a second projection region, and the second projection region is located in the first projection region.

[0016] In a possible implementation, the display panel further includes a dielectric film between the plurality of light emitting devices and the plurality of color conversion layers, and a refractive index of the dielectric film changes from low to high from a side close to the substrate to a side away from the substrate in a direction perpendicular to 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 away from the substrate.

[0018] In a possible implementation, the display panel further includes a grating structure layer between the plurality of light emitting devices and the plurality of color conversion layers, and the grating structure layer is configured to transmit excitation light emitted by the plurality of light emitting devices and reflect converted excitation light of 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 arranged between each light emitting device and color conversion layer, and each convex lens is configured to converge excitation light emitted by the light emitting device to the color conversion layer.

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

[0021] In a third aspect, the present application also provides a display panel preparation method, comprising:

[0022] forming a plurality of pixels arranged in an array on a substrate, wherein each pixel comprises a plurality of sub-pixels arranged at intervals, and each sub-pixel comprises a light-emitting device arranged 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 film layer on the side of the scattering layer away from the substrate.

[0026] In a third aspect, the present application also provides a display panel preparation method, comprising:

[0027] forming a plurality of pixels arranged in an array on a substrate, wherein each pixel comprises a plurality of sub-pixels, and each sub-pixel comprises a light-emitting device arranged 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 each two cured sub-regions, wherein each color conversion layer corresponds to one light-emitting device;

[0031] forming a color film layer on the side of the scattering layer away from the substrate.

[0032] The display panel, display device, and display panel preparation method provided by the present application have the following advantages: the 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 film layer is arranged at intervals on the side of the plurality of color conversion layers away from the substrate. The substrate, the plurality of sub-pixels, the plurality of color conversion layers, and the color film layer form a filling space, and the filling space is filled with the scattering layer. It can be understood that, because the color film layer and the plurality of color conversion layers have gaps, the scattering layer is filled between the color film layer and the plurality of color conversion layers, and because the plurality of color conversion layers have gaps, 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 which is converted into excited light by the color conversion layer, and part of the excitation light which is not converted by the color conversion layer is scattered back to the color conversion layer through the scattering layer filled between the color conversion layer and the color filter layer and the scattering layer filled between the color conversion layers, and then converted into excited light by the color conversion layer. In this way, in the case that the thickness of the color conversion layer is small, the excitation light emitted by the light-emitting device can be fully color converted, the light emission efficiency is ensured, and the color conversion layer with small thickness is easy to prepare in process, saving the manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0035] Figure 1 A cross-sectional view of a display panel provided by an embodiment of the present application;

[0036] Figure 2 A specific structure schematic diagram of a scattering layer provided by an embodiment of the present application;

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

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

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

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

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

[0042] Figure 8 A flowchart of a display panel preparation method provided by an embodiment of the present application;

[0043] Figure 9 A flowchart of a display panel preparation method provided by an embodiment of the present application;

[0044] Figure 10 A flowchart of a display panel preparation method provided by an embodiment of the present application;

[0045] Figure 11 FIG. 4 is a flowchart illustrating a method of manufacturing a display panel according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood, however, that the description which will be given hereinafter is only illustrative and is not intended to limit the scope of the present disclosure. In addition, in the following description, the description of known structures and techniques will be omitted to avoid unnecessarily obscuring the concept of the present disclosure.

[0047] In the drawings, various structural diagrams according to embodiments of the present disclosure are illustrated. These diagrams are not drawn to scale in which certain details are exaggerated for clarity of presentation and may omit certain details for the same reason. The shapes of various regions, layers, and their relative sizes and positional relationship shown in the drawings are merely exemplary, and in actuality, they can deviate due to manufacturing tolerances or technical limitations, and a person skilled in the art can additionally design regions / layers having 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, it can be directly on the other layer / element, or an intervening layer / element can be present therebetween. In addition, if a layer / element is "on" another layer / element in one orientation, it can be "under" the other layer / element when the orientation is reversed.

[0049] With the development of display technology, the resolution of display panels is increasingly required. The pixel size of high-resolution display panels is small (e.g., 4 μm), and the spacing between pixels is also small (e.g., 2 μm). Generally, the color conversion layer of a display panel needs to have a thickness of more than 10 μm in order to sufficiently convert the light emitted by the light emitting device. However, it is currently difficult to achieve a color conversion layer having a thickness of more than 10 μm in the process. Thus, the display panels currently manufactured cannot sufficiently convert the light emitted by the light emitting device.

[0050] Based on the above technical problems, the application concept is that a plurality of color conversion layers are arranged at the side away from the substrate of a plurality of light emitting devices, and each color conversion layer corresponds to a light emitting device. The color film layer is arranged at the side away from the substrate of the plurality of color conversion layers, and there is a gap between the color film layer and the plurality of color conversion layers. The substrate, the plurality of sub-pixels, the plurality of color conversion layers, and the color film layer form a filling space, and the filling space is filled with a scattering layer. Wherein, the excitation light emitted by the light emitting device enters the color conversion layer, part of the excitation light is converted by the color conversion layer to be emitted as excited light, and part of the excitation light that is not converted by the color conversion layer can be scattered by the scattering layer back to the color conversion layer, and then converted by the color conversion layer to be emitted as excited light. In this way, in the case that the thickness of the color conversion layer is small, the excitation light emitted by the light emitting device can also be fully color converted, the light emission efficiency is ensured, and the color conversion layer with small thickness is easy to prepare in process, saving the manufacturing cost.

[0051] In the following, the technical solutions of the application and how the technical solutions of the application solve the above technical problems will be described in detail with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes can not be described again in some examples. The embodiments of the application will be described below with reference to the drawings.

[0052] Please refer to Figure 1 The display panel provided by the embodiments of the application has high resolution. For example, the resolution of the display panel is greater than 1000. Specifically, the display panel comprises:

[0053] The substrate 101 can be, but is not limited to, a flexible substrate, which 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 include at least one flexible substrate and at least one buffer layer, and the flexible substrate and the buffer layer are alternately stacked, which is not limited by the embodiments of the application.

[0055] The plurality of pixels arranged in an array on the substrate 101, each pixel comprising a plurality of sub-pixels arranged in intervals, each sub-pixel comprising a light emitting device 102 arranged on one side of the substrate 101. Each sub-pixel can display a single color, such as a red sub-pixel displaying red, a green sub-pixel displaying green, and a blue sub-pixel displaying blue. The brightness (gray scale) of the sub-pixels of different colors in each pixel can be adjusted, and a variety of colors can be displayed by color combination and superposition, thereby realizing full-color display.

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

[0057] Optionally, the display panel further comprises a plurality of metal isolation layers 112. For example, the thickness of the metal isolation layer 112 can range from but is not limited to 100 nm to 500 nm, and 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 first projection area in the shape of a ring, 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 of another light emitting device 102, so as to avoid mutual interference of the excitation light emitted by the light emitting devices 102, and enable the excitation light of each light emitting device 102 to be output from the direction towards the corresponding color conversion layer 103.

[0059] A plurality of color conversion layers 103 are arranged at intervals on the side of the 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 can adopt a quantum dot QD layer or a fluorescent powder 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. Then, the width of the QD layer can be shrunk and the thickness can be increased by means of thermal reflow, and the shape of the QD layer on the side away from the substrate 101 is arc-shaped, and the width of the prepared QD layer ranges from 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 here.

[0060] In the direction perpendicular to the substrate 101, the height of the QD layer (i.e. the color conversion layer 103) 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 the QD layer in the above preparation process is simple in process and low in manufacturing cost.

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

[0062] Optionally, a planar layer 113 can be arranged between the light emitting device 102 and the color conversion layer 103, wherein the planar layer 113 can adopt but is not limited to an epoxy resin layer, an acrylic resin layer, etc., and the thickness of the planar layer 113 can range from but is not limited to 1.5 μm to 3 μm.

[0063] A color filter layer 108 is arranged on the side of the plurality of color conversion layers 103 away from the substrate 101, and the color filter layer 108 has a gap with the plurality of color conversion layers 103.

[0064] The display panel provided by the embodiment of the present application further comprises a color filter layer 108 arranged on the side of the scattering layer 104 away from the substrate 101, wherein the color filter layer 108 comprises color filter units 106 opposite the color conversion layers 103 and black matrices 107 arranged between adjacent color filter units 106.

[0065] In the embodiments of the present application, the thickness of the color filter layer 108 can range from 1.0 μm to 1.2 μm, but is not limited thereto. 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 can enter the color conversion layer again for color conversion, thereby improving the light extraction efficiency. In addition, the black matrix 107 can also be used to block the light halo at the edges of each color filter unit 106.

[0066] Further, the substrate 101, the plurality of sub-pixels, the plurality of color conversion layers 103, and the color filter layer 108 enclose a filling space, and the filling space is filled with the scattering layer 104.

[0067] It can be understood that, since there is a gap between the color filter layer 108 and the plurality of color conversion layers 103, the scattering layer 104 is filled between the color filter layer 108 and the plurality of color conversion layers 103, and since there is a gap 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, and part of the excitation light is converted by the color conversion layer 103 to be emitted as excited light. Part of the excitation light that has not been converted by the color conversion layer 103 is scattered by the scattering layer 104 filled between the color filter layer 108 and the plurality of color conversion layers 103 and the scattering layer 104 filled between the plurality of color conversion layers 103 back to the color conversion layer 103, and then converted by the color conversion layer 103 to be emitted as excited light.

[0069] For example, as shown in FIG. 1B, the scattering layer 104 includes a plurality of first scattering regions and a plurality of second scattering regions. Each first scattering region is located on the side of one color conversion layer 103 away from the substrate 101. Each second scattering region is located between the gaps of two color conversion layers 103. Figure 1 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, thereby avoiding crosstalk between the excited light output by the adjacent two color conversion layers 103.

[0071] For example, as shown in FIG. 1B, the scattering layer 104 includes a plurality of first scattering regions and a plurality of second scattering regions. Each first scattering region is located on the side of one color conversion layer 103 away from the substrate 101. Each second scattering region is located between the gaps of two color conversion layers 103. Figure 2As shown, the scattering layer 104 includes a light-transmitting layer 202 and multiple scattering particles 201 distributed within the scattering layer 104. The scattering particles 201 can be a TiO2 layer, etc. The light-transmitting layer 202 can be an acrylic resin material layer or an epoxy resin material layer, without limitation. Understandably, when excitation light or stimulated light irradiates the scattering layer 104, the scattering particles 201 in the scattering layer 104 reflect the excitation light or stimulated light, while the light-transmitting layer 202 transmits the excitation light or stimulated light. Furthermore, because the excitation light or stimulated light irradiates each scattering particle 201 in different directions, the scattering layer 104 has the ability to scatter the excitation light or stimulated light in all directions.

[0072] In some embodiments, the concentration of scattering particles 201 in the scattering layer 104 ranges from 40% to 70%. This allows for a more reasonable ratio of transmitted to reflected light by the scattering layer 104. For example, the concentration of scattering particles 201 can be 40%, 60%, or 70%, and is not limited thereto.

[0073] In summary, the display panel provided in this application embodiment includes multiple color transfer layers 103 spaced apart on the side of multiple light-emitting devices 102 away from the substrate 101, with each color transfer layer 103 corresponding to one light-emitting device 102; and color filter layers 108 spaced apart on the side of the multiple color transfer layers 103 away from the substrate 101. The substrate 101, multiple sub-pixels, multiple color transfer layers 103, and color filter layers 108 form a filling space, which is filled with a scattering layer 104. The excitation light emitted by the light-emitting devices 102 enters the color transfer layers 103, where a portion is converted into excitation light and emitted, while the portion of the excitation light not converted by the color transfer layers 103 can be scattered back to the color transfer layers 103 by the scattering layer 104, and then converted back into excitation light by the color transfer layers 103. In this way, even with a small thickness of the color transfer layer 103 (e.g., the height of the color transfer layer 103 is in the range of 3μm to 6μm), the excitation light emitted by the light-emitting device 102 can be fully converted to color, ensuring light extraction efficiency. Furthermore, the thin color transfer layer 103 is easy to fabricate, saving manufacturing costs.

[0074] In other embodiments, such as Figure 3 As shown, each second scattering region includes a cured sub-region 301. In this case, the process step of forming the scattering layer 104 can be performed before the process step of forming the color transfer layer 103.

[0075] For example, a 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 with ultraviolet light at predetermined intervals, forming spaced-apart cured sub-regions 301. Next, a color transfer layer 103 can be prepared by printing ink between two spaced-apart cured sub-regions 301, with each pair of adjacent cured sub-regions 301 restricting the position of the printable ink. Furthermore, as the depth of the scattering layer 104 increases, the intensity of the ultraviolet light decreases, and the scattering region of the scattering layer 104 closer to the light-emitting device 102 has better flowability. Thus, as the printed color transfer layer 103 moves towards the side closer to the light-emitting device 102, it can compress the scattering region of the scattering layer 104 near the light-emitting device 102 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 Based on the corresponding embodiment, the display panel further includes a dielectric film 109, which is located between multiple light-emitting devices 102 and multiple color conversion layers 103. In the direction perpendicular to the substrate 101, the refractive index of the dielectric film 109 increases from the side closer to the substrate 101 to the side farther from the substrate 101. Since the angle of refraction increases when light travels from a denser medium with a higher refractive index to a less dense medium with a lower refractive index, the angle of refraction of the excitation light or 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 rescattered by the scattering layer 104 to the color filter layer 108 for output, thus improving the light extraction efficiency.

[0077] Specifically, the refractive index of the dielectric film 109 can vary from 1.4 to 2.5 from the side closest to the substrate 101 to the side furthest from the substrate 101. For example, as... Figure 5As shown, the medium film 109 can include multiple medium layers, and the refractive index of the multiple medium layers changes from low to high from the side close to the substrate 101 to the side far from the substrate 101. For example, the multiple medium layers from the side close to the substrate 101 to the side far from the substrate 101 can be, in sequence, a SiNx layer 501, a first SiCNx layer 502, a 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 can be 1.4, the refractive index of the first SiCNx layer 502 can be 1.7, the refractive index of the TiO2 layer 504 can be 2.0, the refractive index of the ALO2 layer 505 can be 2.3, and the refractive index of the second SiCNx layer 506 can be 2.5. Alternatively, the medium film 109 can also be a layer of material whose refractive index changes 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 shown in FIG. 1, the display panel further includes a light scattering layer 104, and the light scattering layer 104 is located between the multiple light emitting devices 102 and the color conversion layer 103. Figure 6 As shown, the display panel further includes a grating structure layer 110, and the grating structure layer 110 is located between the multiple light emitting devices 102 and the multiple color conversion layers 103, and the grating structure layer 110 is used to transmit the excitation light emitted by the multiple light emitting devices 102 and is used to reflect the converted excitation light of the multiple color conversion layers 103. It can be understood that the grating structure layer 110 can block the red light (i.e., the excitation light) corresponding to the area of the color conversion layer which converts red light, block the green light (i.e., the excitation light) corresponding to the area of the color conversion layer which converts green light, and block the blue light (i.e., the excitation light) corresponding to the area of the color conversion layer which converts blue light. In this way, the excitation light can be reflected back to the light scattering layer 104 by the grating structure, and then scattered by the light scattering layer 104 to the color film layer 108 for output, thereby improving the light extraction efficiency.

[0079] As shown in FIG. 1, the display panel further includes a light scattering layer 104, and the light scattering layer 104 is located between the multiple light emitting devices 102 and the color conversion layer 103. Figure 7 As shown, the display panel further includes multiple convex lenses 111, and one convex lens 111 is arranged between each light emitting device 102 and the color conversion layer 103, and each convex lens 111 is used to converge the excitation light emitted by the light emitting device 102 to the color conversion layer 103. In this way, the color conversion layer 103 can more efficiently convert the excitation light into the converted excitation light, thereby further improving the light extraction efficiency of the display panel.

[0080] In addition, in some embodiments, the color filter unit 106 directly opposite the color conversion layer 103 includes a color filter unit 106 that transmits red light, a color filter unit 106 that transmits green light, and a color filter unit 106 that transmits blue light. Due to the different transmittances of light of different wavelengths in the same medium, the longer the wavelength, the higher the transmittance, and the greater the thickness of the scattering layer 104, the lower the transmittance. The wavelength of red light is greater than the wavelength of green light, and the wavelength of green light is greater than the wavelength of blue light. Therefore, the thickness of the scattering region of the scattering layer 104 between the color filter unit 106 that transmits red light and the corresponding color conversion layer 103 can range from 0.5 μm to 1 μm. In this way, the scattering region of the scattering layer 104 between the color filter unit 106 that transmits red light and the corresponding color conversion layer 103 can have a high transmittance for red light (i.e., the excitation light), and the blue light (i.e., the excitation light) emitted by the light-emitting device can be reflected to the color conversion layer 103 for multiplexing, thereby improving the light-emitting efficiency. The thickness of the scattering region of the scattering layer 104 between the color filter unit 106 that transmits green light and the corresponding color conversion layer 103 can range from 0.2 μm to 0.3 μm. In this way, the scattering region of the scattering layer 104 between the color filter unit 106 that transmits red light and the corresponding color conversion layer 103 can have a high transmittance for green light (i.e., the excitation light), and the blue light (i.e., the excitation light) emitted by the light-emitting device can be reflected to the color conversion layer 103 for multiplexing, thereby improving the light-emitting efficiency. The thickness of the scattering region of the scattering layer 104 between the color filter unit 106 that transmits blue light and the corresponding color conversion layer 103 can range from 0.1 μm to 0.2 μm. In this way, the scattering region of the scattering layer 104 between the color filter unit 106 that transmits red light and the corresponding color conversion layer 103 can have a high transmittance for blue light (i.e., the excitation light) converted by the color conversion layer 103, and the blue light (i.e., the excitation light) emitted by the light-emitting device can be reflected to the color conversion layer 103 for multiplexing, thereby improving the light-emitting efficiency.

[0081] In addition, the display device provided in the embodiments of the present application includes the display panel provided in the first aspect of the present application. The display device can be, but is not limited to, a mobile phone, a tablet computer, an AR device, or a VR device, and the like, and is not limited herein.

[0082] In addition, as Figure 8 shown, the embodiments of the present application also provide a display panel preparation method. It should be noted that the display panel preparation method provided in the embodiments of the present application has the same basic principles and technical effects as the above-mentioned embodiments. For brevity, the part not mentioned in the embodiments of the present application can refer to the corresponding content in the above-mentioned embodiments. Specifically, the display panel preparation method provided in the embodiments of the present application includes:

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

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

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

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

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

[0088] In addition, such as Figure 10 As shown in the embodiments of this application, a method for manufacturing a display panel is also provided. It should be noted that the basic principle and technical effects of the display panel manufacturing method provided in this application are the same as those in the above embodiments. For the sake of brevity, any parts not mentioned in the embodiments of this application can be referred to the corresponding content in the above embodiments. Specifically, the display panel manufacturing method provided in the embodiments of this application includes:

[0089] S1001: As Figure 11 As shown in (a) and (b), a plurality of pixels are formed in an array 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] like Figure 11 As shown in (c), a metal isolation layer 112 may also be formed around the light-emitting device 102 and a planarization layer 113 may 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 As shown in (e), a plurality of spaced-apart solidified sub-regions 301 are formed in the scattering layer 104.

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

[0094] For example, S1002-S1004 described above can be implemented as follows: a 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 with ultraviolet light at predetermined intervals, so that the scattering layer 104 forms spaced-apart cured sub-regions 301. Next, a color transfer layer 103 can be formed by printing ink between two spaced-apart cured sub-regions 301, with each pair of adjacent cured sub-regions 301 restricting the position of the printable ink. Moreover, as the depth of the scattering layer 104 increases, the intensity of the ultraviolet light decreases, and the scattering region of the scattering layer 104 closer to the light-emitting device 102 has better flowability. In this way, when the printed color transfer layer 103 moves towards the side closer to the light-emitting device 102, it can squeeze the scattering region of the scattering layer 104 near the light-emitting device 102 to both sides of the light-emitting device 102, forming a color transfer layer 103 with a fixed morphology.

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

[0096] Understandably, Figure 10 The corresponding display panel manufacturing method and Figure 8 The difference lies in the manufacturing method of the corresponding display panel. Figure 10 In the corresponding display panel manufacturing method, the process step of preparing the color transfer layer 103 follows the process step of preparing the scattering layer 104, while... Figure 8 In the corresponding display panel manufacturing method, the process step of preparing the color transfer layer 103 is before the process step of preparing the scattering layer 104.

[0097] In the above description, detailed description of the configuration of each layer and the like is not made. However, it should be understood by those skilled in the art that the layer, region, and the like having a desired shape can be formed by various techniques. In addition, a method different from the above-described method can be designed by those skilled in the art in order to form the same structure. In addition, although each embodiment is described above separately, this does not mean that the measures in each embodiment cannot be used advantageously in combination.

[0098] Although preferred embodiments of the application have been described herein, it will be apparent to those skilled in the art that various modifications and changes can be made to the embodiments without departing from the spirit and scope of the application. Accordingly, it is intended that all such modifications and changes be included within the scope of the application as set forth in the following claims and their equivalents.

[0099] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate substrate; a plurality of pixels arranged in an array on the substrate substrate, each pixel comprising a plurality of sub-pixels arranged at intervals, each sub-pixel comprising a light-emitting device arranged on one side of the substrate substrate; a plurality of color conversion layers arranged at intervals on the side of the plurality of light-emitting devices away from the substrate substrate, and each color conversion layer corresponding to one light-emitting device; a color film layer arranged on the side of the plurality of color conversion layers away from the substrate substrate, and the color film layer and the plurality of color conversion layers having a gap therebetween, wherein the substrate substrate, the plurality of sub-pixels, the plurality of color conversion layers and the color film layer enclose a filling space, and the filling space is filled with a scattering layer, wherein the scattering layer comprises 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 substrate; each second scattering region is located between the gap between two color conversion layers; the color film layer comprises 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 the plurality of color conversion layers, wherein the thickness of the first scattering region located between the color filter unit for transmitting red light and the corresponding color conversion layer ranges from 0.5 μm to 1 μm, the thickness of the first scattering region located between the color filter unit for transmitting green light and the corresponding color conversion layer ranges from 0.2 μm to 0.3 μm, and the thickness of the first scattering region located between the color filter unit for transmitting blue light and the corresponding color conversion layer ranges from 0.1 μm to 0.2 μm; The height of each color conversion layer in the direction perpendicular to the substrate substrate is greater than 3 μm and less than 6 μm.

2. The display panel of claim 1, wherein, Each second scattering region comprises a cured sub-region.

3. The display panel of claim 1, wherein, The scattering layer comprises a light-transmitting layer and a plurality of scattering particles distributed in the light-transmitting layer.

4. The display panel of claim 3, wherein, The concentration of the scattering particles in the scattering layer ranges from 40% to 70%.

5. The display panel of claim 1, wherein, The display panel further comprises a plurality of metal isolation layers, the orthographic projection of each metal isolation layer on the substrate substrate is a first projection region in the shape of a ring, the orthographic projection of the light-emitting device of each sub-pixel on the substrate substrate is a second projection region, and the second projection region is located in the first projection region.

6. The display panel of claim 1, wherein, The display panel further comprises a dielectric film between the plurality of light-emitting devices and the plurality of color conversion layers, and in the direction perpendicular to the substrate substrate, the refractive index of the dielectric film increases from the side close to the substrate substrate to the side away from the substrate substrate.

7. The display panel of claim 6, wherein, The refractive index of the dielectric film changes from 1.4 to 2.5 from the side close to the substrate substrate to the side away from the substrate substrate.

8. The display panel of claim 1, wherein, The display panel further comprises a grating structure layer between the plurality of light-emitting devices and the plurality of color conversion layers, and the grating structure layer is used for transmitting the excitation light emitted by the plurality of light-emitting devices and reflecting the converted excitation light of the plurality of color conversion layers.

9. The display panel of claim 1, wherein, The display panel further comprises a plurality of convex lenses, and each convex lens is arranged between the light emitting device and the color conversion layer, and each convex lens is used for converging the excitation light emitted by the light emitting device to the color conversion layer.

10. A display device, characterized by comprising: The display panel of any one of claims 1-9.

11. A method for manufacturing a display panel, characterized in that, The method comprises: forming a plurality of pixels arranged in an array on a substrate, wherein each pixel comprises a plurality of sub-pixels arranged at intervals, and each sub-pixel comprises a light emitting device arranged 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 away from the substrate, wherein each color conversion layer corresponds to one light emitting device; 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; forming a color filter layer on the side of the scattering layer away from the substrate; and wherein the scattering layer comprises 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, and each second scattering region is located between the gap of two color conversion layers; the color filter layer comprises 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 the plurality of color conversion layers; the thickness of the first scattering region located between the color filter unit for transmitting red light and the corresponding color conversion layer ranges from 0.5 μm to 1 μm, the thickness of the first scattering region located between the color filter unit for transmitting green light and the corresponding color conversion layer ranges from 0.2 μm to 0.3 μm, the thickness of the first scattering region located between the color filter unit for transmitting blue light and the corresponding color conversion layer ranges from 0.1 μm to 0.2 μm, and the height of each color conversion layer in the direction perpendicular to the substrate is greater than 3 μm and less than 6 μm.

12. A method for manufacturing a display panel, characterized in that, The method comprises: forming a plurality of pixels arranged in an array on a substrate, wherein each pixel comprises a plurality of sub-pixels, and each sub-pixel comprises a light emitting device arranged on one side of the substrate; 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; forming a plurality of cured sub-regions arranged at intervals in the scattering layer; printing a color conversion layer between each two cured sub-regions, wherein each color conversion layer corresponds to one light emitting device; forming a color filter layer on the side of the scattering layer away from the substrate; and 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 a side of one color conversion layer away from the substrate, and each second scattering region is located between the gaps of two color conversion layers; the color filter layer includes color filter units for transmitting red light, green light and blue light respectively opposite to the plurality of color conversion layers, wherein the thickness of the first scattering region between the color filter unit for transmitting red light and the corresponding color conversion layer ranges from 0.5 μm to 1 μm, the thickness of the first scattering region between the color filter unit for transmitting green light and the corresponding color conversion layer ranges from 0.2 μm to 0.3 μm, and the thickness of the first scattering region between the color filter unit for transmitting blue light and the corresponding color conversion layer ranges from 0.1 μm to 0.2 μm; and the height of each color conversion layer in the direction perpendicular to the substrate is greater than 3 μm and less than 6 μm.

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