Display panel, display device and method for manufacturing display panel

Abstract

The present invention discloses a display panel, a display device and a method for manufacturing a display panel, so as to improve the problem that when the display panel of the prior art improves the front light output efficiency of the display panel, the viewing angle brightness will drop suddenly, thereby reducing the viewing angle of the display panel, or even causing the problem of no display at a large viewing angle. The display panel comprises: a plurality of light-emitting elements; a light conversion structure, the light conversion structure is located on the side of the light-emitting element away from the base substrate, the light conversion structure comprises a stacked optical pattern layer and a color conversion layer, the optical pattern layer comprises a plurality of protrusions; a scattering layer comprises a plurality of scattering patterns spaced apart from each other, the scattering pattern comprises a matrix, and scattering particles distributed in the matrix; in the display area of ​​the display panel, the total area of ​​the orthographic projection of the scattering pattern on the base substrate is smaller than the total area of ​​the orthographic projection of the protrusion on the base substrate.

Description

Technical Field

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

[0002] At present, the organic light emitting diode (OLED) display technology is mainly used in small and medium-sized products, such as mobile phones and watches, with a resolution of about 300ppi to 600ppi. The current mainstream technology for OLED device production is fine metal mask (FMM) evaporation technology. Limited by the accuracy of FMM, the resolution of OLED display products cannot exceed 1000ppi, so the high-resolution requirements of large-size products such as TVs, computers, tablets, etc. cannot be met. In terms of color gamut, OLED products can currently meet the DCI-P3 standard (Rx: 0.680, Gx: 0.265, By: 0.060), and as customers' demand for product color saturation and color gamut continues to increase, the color gamut demand of future products will inevitably be based on BT2020 (Rx: 0.708, Gx: 0.170, By: 0.046). In order to meet this demand, the color saturation and color gamut of the product must be further improved.

[0003] QD technology uses nano-scale semiconductor particles to generate light of a specific frequency by applying a certain electric field or light pressure to them. The emission frequency is related to the particle size, so the frequency of the light, that is, the color of the light, can be adjusted by adjusting the particle size. The spectrum emitted by quantum dots is narrower than the R / G / B half-peak width of the OLED self-luminous spectrum, the spectrum is purer, and the color saturation is higher. A QD structure is set above the B-OLED device, and it is stimulated by blue light self-luminescence to obtain a white light spectrum with a purer R / G / B monochromatic spectrum, thereby achieving the purpose of improving color saturation and color gamut.

[0004] However, the display panel of the prior art has the problem that when the front light output efficiency of the display panel is improved, the viewing angle brightness will drop sharply, thereby reducing the viewing angle of the display panel, or even causing no display at a large viewing angle (60°→80°). Summary of the invention

[0005] The present invention provides a display panel, a display device and a method for manufacturing a display panel, so as to improve the problem that when the front light output efficiency of the display panel is improved, the viewing angle brightness will drop sharply, thereby reducing the viewing angle of the display panel, or even causing no display at a large viewing angle (60°→80°).

[0006] An embodiment of the present invention provides a display panel, including:

[0007] A plurality of light emitting elements located on one side of the substrate;

[0008] a light conversion structure, the light conversion structure being located on a side of the light emitting element away from the substrate, the light conversion structure comprising a stacked optical pattern layer and a color conversion layer, the optical pattern layer comprising a plurality of protrusions; the color conversion layer converts the wavelength of at least part of the light emitted by the light emitting element;

[0009] A scattering layer, the scattering layer is located on a side of the light conversion structure away from the light-emitting element, and includes a plurality of scattering patterns spaced apart from each other, the scattering patterns include a matrix and scattering particles distributed in the matrix; in a display area of ​​the display panel, a total area of ​​an orthographic projection of the scattering patterns on the base substrate is smaller than a total area of ​​an orthographic projection of the protrusions on the base substrate.

[0010] In a possible implementation, within the display area of ​​the display panel, an orthographic projection of at least one of the scattering patterns on the base substrate overlaps with an orthographic projection of at least one of the protrusions on the base substrate.

[0011] In a possible implementation manner, an orthographic projection of one of the scattering patterns on the substrate covers an orthographic projection of one of the protrusions on the substrate;

[0012] Alternatively, the sum of overlapping areas of the plurality of protrusions and the orthographic projection of one scattering pattern on the base substrate is greater than or equal to the area of ​​the orthographic projection of one protrusion on the base substrate.

[0013] In a possible implementation manner, a ratio of the maximum thickness of the protrusion to the thickness of the scattering pattern is greater than or equal to 0.8 and less than or equal to 1.2.

[0014] In a possible implementation manner, the orthographic projection of the at least one scattering pattern on the substrate covers the orthographic projection of one protrusion on the substrate, and covers at least part of the orthographic projection of an adjacent protrusion on the substrate.

[0015] In a possible implementation manner, a ratio of the thickness of the scattering pattern to the maximum thickness of the protrusion is greater than or equal to 0.1 and less than or equal to 0.5.

[0016] In a possible implementation manner, the thickness of the scattering pattern is less than or equal to 5 micrometers.

[0017] In a possible implementation, the scattering pattern includes a plurality of scattering pattern bars extending along the first direction and arranged sequentially along the second direction, and transparent bars located between adjacent scattering pattern bars, and the scattering pattern bars and the transparent bars are alternately arranged in the second direction;

[0018] In a display area of ​​the display panel, an orthographic projection of at least one of the protrusions on the base substrate intersects with an orthographic projection of a plurality of scattering pattern strips on the base substrate.

[0019] In a possible implementation, in the display area of ​​the display panel, an orthographic projection of each of the protrusions on the base substrate intersects with an orthographic projection of a plurality of scattering pattern strips on the base substrate.

[0020] In a possible implementation manner, the width of the scattering pattern strip in the second direction is the same as the width of the transparent strip in the second direction.

[0021] In a possible embodiment, within the display area of ​​the display panel, the protrusions are distributed in an array, and the orthographic projection of the scattering pattern on the substrate substrate covers part of the orthographic projection of the protrusions on the substrate substrate; and, within at least a portion of the display area of ​​the display panel, the protrusions covered by the scattering pattern are uniformly distributed relative to all protrusions in the at least a portion of the area.

[0022] In a possible implementation manner, within each of the scattering patterns, the scattering particles are uniformly distributed in the matrix.

[0023] In a possible implementation manner, in the display area of ​​the display panel, the distribution area of ​​the scattering particles accounts for 10% to 30% of the total area of ​​the scattering layer.

[0024] In a possible implementation, the display panel includes a plurality of sub-pixels, the plurality of sub-pixels include red pixels, green pixels and blue pixels; the sub-pixels include a color conversion layer;

[0025] The color conversion layer includes a red quantum dot pattern corresponding to the red pixel and emitting red light, a green quantum dot pattern corresponding to the green pixel and emitting green light, and a blue quantum dot pattern or a transparent color resist corresponding to the blue pixel;

[0026] The light emitting element includes an organic light emitting element that emits blue light.

[0027] In a possible embodiment, the scattering pattern is arranged in at least one of the sub-pixels; when the scattering pattern is arranged in a red sub-pixel, the particle size range of the scattering particles is 625nm to 740nm; when the scattering pattern is arranged in a green sub-pixel, the particle size range of the scattering particles is 490nm to 570nm; when the scattering pattern is arranged in a blue sub-pixel, the particle size range of the scattering particles is 440nm to 470nm.

[0028] An embodiment of the present invention further provides a display device, comprising the display panel provided by the embodiment of the present invention.

[0029] The embodiment of the present invention further provides a method for manufacturing the display panel provided in the embodiment of the present invention, comprising:

[0030] forming a plurality of light emitting elements on one side of the base substrate;

[0031] A light conversion structure is formed on a side of the light emitting element away from the substrate, wherein the light conversion structure comprises an optical pattern layer and a color conversion layer which are stacked, the optical pattern layer comprises a plurality of protrusions; and the color conversion layer converts at least part of the light emitted by the light emitting element;

[0032] A scattering layer including a plurality of mutually spaced scattering patterns is formed on a side of the light conversion structure facing away from the light emitting element, wherein the scattering pattern includes a matrix and scattering particles distributed in the matrix; and within a display area of ​​the display panel, a total area of ​​an orthographic projection of the scattering pattern on the base substrate is smaller than a total area of ​​an orthographic projection of the protrusion on the base substrate.

[0033] The beneficial effects of the embodiments of the present invention are as follows: In the embodiments of the present invention, the display panel includes a scattering layer located on the side of the light conversion structure away from the light-emitting element, the scattering layer has a plurality of scattering patterns spaced apart from each other, and the total area of ​​the orthographic projections of the scattering patterns on the substrate is smaller than the total area of ​​the orthographic projections of the protrusions on the substrate, so that part of the incident light from below can be scattered to compensate for the viewing angle brightness, thereby increasing the viewing angle of the display panel and the contrast at a large viewing angle, and increasing the viewing angle of the display panel while satisfying the front light output efficiency as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 One of the schematic diagrams of a display panel provided by an embodiment of the present invention;

[0035] Figure 2 Schematic diagram of brightness attenuation comparison of display panels with different structures;

[0036] Figure 3 One of the distribution diagrams of the scattering pattern provided in the embodiment of the present invention;

[0037] Figure 4 A second schematic diagram of the distribution of the scattering pattern provided in an embodiment of the present invention;

[0038] Figure 5A A third schematic diagram of the distribution of the scattering pattern provided in an embodiment of the present invention;

[0039] Figure 5B A cross-sectional view corresponding to the third distribution schematic diagram of the scattering pattern provided in an embodiment of the present invention;

[0040] Figure 6 A fourth distribution diagram of a scattering pattern provided in an embodiment of the present invention;

[0041] Figure 7 A second schematic diagram of a display panel provided by an embodiment of the present invention;

[0042] Figure 8 A schematic diagram of a display panel manufacturing process provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0044] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits detailed descriptions of well-known functions and well-known components.

[0046] Conventional B-OLED excitation QD structure, although the viewing angle brightness attenuation is small and the display viewing angle is large, but because QD cannot absorb 100% of the energy of the excitation light source, and QD has self-absorption, as well as longitudinal luminescence loss, the vertical light output efficiency of the device is low and cannot meet the mass production efficiency requirements. Therefore, on the basis of the conventional device structure, an optical pattern layer is added. Its purpose is to change the light output direction and adjust the incident light to vertical light output as much as possible, thereby improving the front light output efficiency to achieve the mass production efficiency level. However, this structure has corresponding disadvantages. While the vertical light output of the device is improved, the viewing angle brightness drops sharply, thereby reducing the viewing angle of the device, and even no display phenomenon occurs at a large viewing angle (60°→80°).

[0047] In view of this, see Figure 1 and Figure 7 As shown, an embodiment of the present invention provides a display panel, including:

[0048] A light emitting assembly 2 located on one side of the base substrate 1, the light emitting assembly comprising a plurality of light emitting elements 20;

[0049] The light conversion structure 4 is located on the side of the light emitting element 20 away from the substrate 1. The light conversion structure 4 includes a stacked optical pattern layer 42 and a color conversion layer 41. The optical pattern layer 42 includes a plurality of protrusions 420. The color conversion layer 41 converts the light emitted by the light emitting element 20.

[0050] The scattering layer 5 is located on the side of the light conversion structure 4 away from the light emitting element 20, and includes a plurality of scattering patterns 50 spaced apart from each other. The scattering pattern 50 includes a matrix and scattering particles distributed in the matrix. In the display area of ​​the display panel, the total area of ​​the orthographic projection of the scattering pattern 50 on the base substrate 1 is smaller than the total area of ​​the orthographic projection of the protrusion 420 on the base substrate 1.

[0051] In an embodiment of the present invention, the display panel includes a scattering layer 5 located on the side of the light conversion structure 4 away from the light emitting element 20, the scattering layer 5 has a plurality of scattering patterns 50 spaced apart from each other, and the total area of ​​the orthographic projection of the scattering pattern 50 on the base substrate 1 is smaller than the total area of ​​the orthographic projection of the protrusion 420 on the base substrate 1, and can partially scatter the incident light from below to compensate for the viewing angle brightness, thereby increasing the viewing angle of the display panel and the contrast at a large viewing angle, while satisfying the front light extraction efficiency as much as possible, and increasing the viewing angle of the display panel.

[0052] In a specific implementation, the protrusion 420 may face the side away from the light-emitting element 20. Specifically, the optical pattern layer 42 includes a plurality of repeating units, each repeating unit includes a plurality of protrusions 420, and the plurality of protrusions 420 in the same repeating unit form a quadrilateral, or the plurality of protrusions 420 in the same repeating unit form a hexagon. Specifically, the shape of the protrusion 420 may include at least one of a hemispherical shape, a conical shape, a quadrangular pyramid, and a hexagonal pyramid. Specifically, the shape of the protrusion 420 may include a strip prism. Specifically, the material of the protrusion 420 may be a resin, and the refractive index may be greater than or equal to 1.5 and less than or equal to 1.7. Specifically, the material of the protrusion 420 may be a transparent material. Specifically, the refractive index of the protrusion 420 may be greater than or equal to 1.5 and less than or equal to 1.6.

[0053] Specific, combined Figure 2 As shown by Figure 2 It can be seen that compared with the OLED-excited QD structure (i.e., QD-OLED structure) without an additional optical pattern layer, the brightness attenuation drops sharply after the optical pattern layer is added. By setting a scattering layer on the basis of the added optical pattern layer, the viewing angle of the display panel can be increased while meeting the front light output efficiency, and the display has a higher brightness at a large viewing angle.

[0054] In some embodiments, the protrusion 420 may also be directed toward one side of the light emitting element 20 , which has the effect of improving the front light extraction efficiency.

[0055] In one possible implementation, combining Figure 1 As shown, the display panel further includes a flat portion 6 filling the gaps between adjacent scattering patterns 50. In the embodiment of the present invention, the display panel further includes a flat portion 6 filling the gaps between adjacent scattering patterns 50, which can flatten the scattering layer 5 and facilitate the production of subsequent film layers (e.g., color filter layers).

[0056] In one possible implementation, combining Figure 3 As shown, in the display area of ​​the display panel, the orthographic projection of at least one scattering pattern 50 on the base substrate 1 overlaps with the orthographic projection of at least one protrusion 420 on the base substrate 1 .

[0057] In a specific implementation, the thickness and width of the scattering pattern 50 can be designed to control the amount of longitudinal light output, thereby increasing the viewing angle of the device while satisfying the front light output efficiency as much as possible.

[0058] Preferably, the orthographic projection of a scattering pattern 50 on the base substrate 1 covers the orthographic projection of a protrusion 402 on the base substrate 1. It is understandable that, while the orthographic projection of a scattering pattern 50 on the base substrate 1 covers the orthographic projection of a protrusion 402 on the base substrate 1, it can also cover the orthographic projection of another protrusion 402 on the base substrate 1 or overlap with the orthographic projection of another protrusion 402 on the base substrate 1. In this way, the light modulated by the protrusion 402 can be effectively scattered by the scattering pattern 50 to achieve the purpose of increasing the viewing angle.

[0059] Preferably, the sum of the overlapping areas of the orthographic projections of the plurality of protrusions 402 and a scattering pattern 50 on the substrate is greater than or equal to the area of ​​the orthographic projection of the protrusion 402 on the substrate. In this way, the area of ​​the protrusion 402 covered by the scattering pattern is large enough, and the light modulated by the plurality of protrusions 402 can be effectively scattered by the scattering pattern 50, so as to achieve the purpose of increasing the viewing angle.

[0060] In a possible implementation, the ratio of the maximum thickness h2 of the protrusion 420 to the thickness h1 of the scattering pattern 50 is greater than or equal to 0.8 and less than or equal to 1.2. In a specific embodiment, the orthographic projection area of ​​the scattering pattern 50 on the base substrate 1 may be greater than the orthographic projection area of ​​the protrusion 420 on the base substrate 1, and the orthographic projection of the scattering pattern 50 on the base substrate 1 covers the orthographic projection of at least one protrusion 420 on the base substrate 1. In the embodiment of the present invention, the thickness of the scattering pattern 50 is substantially equal to the thickness of the protrusion 420, and the size of the scattering pattern 50 is greater than the size of the protrusion 420. By increasing the size of the scattering pattern 50 parallel to the base substrate 1, the large viewing angle light output of the display panel can be increased, thereby increasing the viewing angle of the display panel while satisfying the front light output efficiency as much as possible. Specifically, the thickness of the scattering pattern 50 can range from 15 microns to 25 microns.

[0061] Specifically, the maximum thickness h2 of the protrusion 420 can be understood as the thickness of the protrusion 420 at the position with the maximum thickness in the direction perpendicular to the base substrate 1, for example, Figure 3 As shown, when the protrusion 420 is hemispherical, the maximum thickness of the protrusion 420 can be understood as the distance from the top of the hemisphere to the bottom of the hemisphere, that is, the radius of the hemisphere. Specifically, the ratio of the maximum thickness h2 of the protrusion 420 to the thickness h1 of the scattering pattern 50 is greater than or equal to 0.9 and less than or equal to 1.1. Specifically, the ratio of the maximum thickness h2 of the protrusion 420 to the thickness h1 of the scattering pattern 50 is 1.

[0062] In a specific embodiment, the orthographic projection of the scattering pattern 50 on the substrate substrate 1 covers the orthographic projection of the protrusion 420 on the substrate substrate 1, and covers at least part of the orthographic projection of the adjacent protrusion 420 on the substrate substrate 1. Specifically, for example, the orthographic projection of the scattering pattern 50 on the substrate substrate 1 covers the orthographic projection of the protrusion 420 on the substrate substrate 1, and covers one-third of the orthographic projection of the adjacent protrusion 420 on the substrate substrate 1. Specifically, for another example, the orthographic projection of the scattering pattern 50 on the substrate substrate 1 covers the orthographic projection of the protrusion 420 on the substrate substrate 1, and covers two-thirds of the orthographic projection of the adjacent protrusion 420 on the substrate substrate 1. Specifically, for another example, the orthographic projection of the scattering pattern 50 on the substrate substrate 1 covers the orthographic projection of the protrusion 420 on the substrate substrate 1, and covers all of the orthographic projection of the adjacent protrusion 420 on the substrate substrate 1. Specifically, for another example, the orthographic projection of the scattering pattern 50 on the substrate substrate 1 covers the orthographic projection of the protrusion 420 on the substrate substrate 1, and covers the orthographic projections of 2-5 protrusions 420 on the substrate substrate 1 on the periphery.

[0063] In one possible implementation, see Figure 4 As shown, the ratio of the thickness h1 of the scattering pattern 50 to the maximum thickness h2 of the protrusion 420 is greater than or equal to 0.1, and less than or equal to 0.5. In a specific embodiment, in the display area of ​​the display panel, the orthographic projection of at least one scattering pattern 50 on the substrate 1 covers the orthographic projection of a protrusion 420 on the substrate 1. In a specific embodiment, the orthographic projection of the scattering pattern 50 on the substrate 1 coincides with the orthographic projection of the protrusion 420 on the substrate 1, that is, the scattering pattern 50 is only arranged above a portion of the protrusion 420, and the size of the arranged scattering pattern 50 on the plane parallel to the substrate 1 is equal to the maximum size of the corresponding protrusion 420 on the plane parallel to the substrate 1. Specifically, the thickness h1 of the scattering pattern 50 can be less than or equal to 5 microns. In the embodiment of the present invention, the ratio of the thickness h1 of the scattering pattern 50 to the maximum thickness h2 of the protrusion 420 is greater than or equal to 0.1 and less than or equal to 0.5; the orthographic projection of the scattering pattern 50 on the base substrate 1 coincides with the orthographic projection of the protrusion 420 on the base substrate 1, that is, when the size of the scattering pattern 50 is roughly the same as the size of the protrusion 420, the thickness of the scattering pattern 50 can be reduced to increase the large-viewing angle light output of the display panel, thereby increasing the viewing angle of the display panel while satisfying the front light output efficiency as much as possible.

[0064] Specifically, the ratio of the thickness h1 of the scattering pattern 50 to the maximum thickness h2 of the protrusion 420 may be greater than or equal to 0.1 and less than or equal to 0.4. Specifically, the ratio may be greater than or equal to 0.2 and less than or equal to 0.3.

[0065] In one possible implementation, see Figure 5AAs shown, the scattering pattern 50 includes a plurality of scattering pattern bars 501 extending along the first direction AB and arranged in sequence along the second direction CD, and transparent bars 502 located between adjacent scattering pattern bars 501, and the scattering pattern bars 501 and the transparent bars 502 are alternately arranged in the second direction CD; in the display area of ​​the display panel, the orthographic projection of at least one protrusion 42 on the base substrate 1 intersects with the orthographic projections of the plurality of scattering pattern bars 501 on the base substrate 1. In this way, for one protrusion, the distribution area of ​​the scattering particles is smaller than the distribution area of ​​the protrusion 420, so as to scatter part of the light emitted by the protrusion 420. Specifically, in combination with Figure 5A As shown, in this embodiment, a scattering pattern 50 may be provided on a side of each protrusion 420 facing away from the light emitting element 20 .

[0066] In one possible implementation, combining Figure 5A As shown, in the display area of ​​the display panel, the orthographic projection of at least one protrusion 420 on the base substrate 1 intersects with the orthographic projections of the plurality of scattering pattern strips 501 on the base substrate 1 .

[0067] Preferably, the area enclosed by the orthographic projections of the plurality of scattering pattern strips 501 on the substrate 1 surrounds the orthographic projection of at least one protrusion 420 on the substrate 1; and at least one protrusion 402 has two edge upper endpoints corresponding to the widest distance in the second direction CD (for example, Figure 5B The orthographic projections of the scattering pattern strip 501 on the substrate 1 are all located in the orthographic projection of the scattering pattern strip 501 on the substrate 1 (for example, points E and F are distributed in the orthographic projection of a scattering pattern strip on the substrate 1).

[0068] In a possible implementation manner, the width a1 of the scattering pattern strip 501 in the second direction CD is the same as the width a2 of the transparent strip 502 in the second direction CD.

[0069] Specifically, in each scattering pattern strip 501 , the scattering particles are evenly distributed in the matrix.

[0070] In one possible implementation, see Figure 6 As shown, Figure 6 The left picture in the figure is a schematic diagram of the distribution of convexities. Figure 6 The right figure is a schematic diagram of the protrusions after being covered by the scattering pattern. In the display area of ​​the display panel, the protrusions 420 are distributed in an array, and the orthographic projection of the scattering pattern 50 on the base substrate 1 covers the orthographic projection of part of the protrusions 420 on the base substrate 1; and, in at least part of the display area of ​​the display panel, the protrusions 420 covered by the scattering pattern 50 are uniformly distributed relative to all the protrusions 420 in at least part of the area.

[0071] The protrusions 420 covered by the scattering pattern 50 are uniformly distributed relative to all the protrusions 420 in at least a partial area, which can be understood as a periodic distribution pattern between different scattering patterns 50 in the target area (i.e., at least a partial area defined). For example, along a specific direction, the distances between different scattering patterns 50 are equal or approximately equal. The protrusions 420 covered by the scattering pattern 50 are uniformly distributed relative to all the protrusions 420 in at least a partial area, so that the light modulated by the scattering pattern 50 and the light not modulated by the scattering pattern 50 can be uniformly distributed and emitted from the light-emitting surface of the display panel, meeting the realistic effect requirements of the display panel.

[0072] The at least partial area may be the entire area of ​​the display panel display area, or may be a partial area of ​​the display panel display area. For example, the at least partial area may be an area defined by one or more of a red sub-pixel, a blue sub-pixel, and a green sub-pixel. For example, when the scattering pattern 50 is distributed only in the area defined by the blue sub-pixel, the scattering pattern 50 may increase the viewing angle of the blue sub-pixel while satisfying the front light extraction efficiency of the blue sub-pixel.

[0073] Specifically, for example, combining Figure 6 As shown, the protrusions 420 are arranged in sequence along the third direction EF to form a protrusion group 400, and a plurality of protrusion groups 400 are arranged in sequence along the fourth direction GH; the scattering patterns 50 are arranged in sequence along the third direction EF to form a scattering pattern group 500, and a plurality of scattering pattern groups 500 are arranged in sequence along the fourth direction GH; there is at least one protrusion group 400 between adjacent scattering pattern groups 500. In a column area where the protrusions 420 of the display area of ​​the display panel are distributed, the protrusions 420 covered by the scattering pattern 50 are uniformly distributed relative to all the protrusions 420 of the column. Or, for example, the scattering pattern 50 is only distributed at the positions of the odd-numbered rows in a column of protrusions, then in a column area where the protrusions 420 of the display area of ​​the display panel are distributed, the protrusions 420 covered by the scattering pattern 50 (that is, the protrusions at the odd-numbered rows) are uniformly distributed relative to all the protrusions 420 of the column of protrusions. Or, for another example, the scattering pattern 50 is only distributed in the even-numbered rows of a column of protrusions. Then, in a column of protrusions 420 in the display area of ​​the display panel, the protrusions 420 covered by the scattering pattern 50 (i.e., the protrusions in the even-numbered rows) are evenly distributed relative to all the protrusions 420 in the column of protrusions. Specifically, in each scattering pattern 50, the scattering particles are evenly distributed in the matrix. In this way, by only arranging the scattering pattern 50 above some of the protrusions 420, the total area of ​​the orthographic projection of the scattering pattern 50 on the base substrate 1 is smaller than the total area of ​​the orthographic projection of the protrusions 420 on the base substrate 1.

[0074] In a possible implementation, in the display area of ​​the display panel, the distribution area of ​​the scattering particles accounts for 10% to 30% of the total area of ​​the scattering layer 5 .

[0075] In a possible implementation, in at least a portion of the display area of ​​the display panel, the distribution area of ​​the scattering particles accounts for 10% to 30% of the total area of ​​the scattering layer 5 in the at least portion of the display area. For example, the at least portion of the display area may be an area defined by one or more of a red sub-pixel, a blue sub-pixel, and a green sub-pixel.

[0076] In one possible implementation, combining Figure 1 and Figure 7 As shown, the optical pattern layer 42 is located on the side of the color conversion layer 41 away from the light emitting element 20, and a low refractive index layer 43 is further provided between the color conversion layer 41 and the scattering layer 5, and the refractive index of the low refractive index layer 43 is less than that of the protrusion 420. The low refractive index layer 43 is at least partially arranged in the same layer as the optical pattern layer 42 to fill the gap of the optical pattern layer 42, and the low refractive index layer 43 cooperates with the protrusion 420 to obtain a focusing effect. Preferably, the refractive index of the refractive index layer 43 can be less than the refractive index of the quantum dot matrix of the color conversion layer 41, and the low refractive index layer 43 can fully reflect the large-angle backlight passing through the color conversion layer 41 back to the color conversion layer 41, and excite corresponding photons to improve the conversion rate of the color conversion layer 41. Specifically, the refractive index range of the refractive index layer 43 can be greater than or equal to 1.3 and less than or equal to 1.4. Specifically, the material of the quantum dot matrix can be a resin, and the refractive index range can be greater than or equal to 1.5 and less than or equal to 1.7.

[0077] In a preferred embodiment, the maximum distance between the low refractive index layer 43 and the base substrate 1 is greater than or equal to the maximum distance between the protrusion 420 and the base substrate 1, so the low refractive index layer 43 can have a flat effect. In a preferred embodiment, the low refractive index layer 43 can be made of the same material as the flat portion 6 and can be prepared using the same process, which has the effect of simplifying the process. In a possible implementation, combined with Figure 7 As shown, the display panel includes a plurality of sub-pixels P, and the plurality of sub-pixels P include a red pixel P1, a green pixel P2, and a blue pixel P3; the sub-pixels include a color conversion layer 41; the color conversion layer 41 includes a red quantum dot pattern 411 corresponding to the red pixel P1 and emitting red light, a green quantum dot pattern 412 corresponding to the green pixel P2 and emitting green light, and a blue pattern 413 corresponding to the blue pixel P3, wherein the blue pattern 413 can be a blue quantum dot pattern or a transparent color resist; the light-emitting element includes an organic light-emitting element emitting blue light.

[0078] In one possible implementation, combining Figure 7As shown, the scattering pattern 50 is set in at least one sub-pixel P; when the scattering pattern 50 is set in the red sub-pixel P1, the particle size range of the scattering particles is 625nm~740nm; when the scattering pattern 50 is set in the green sub-pixel P2, the particle size range of the scattering particles is 49nm~570nm; when the scattering pattern 50 is set in the blue sub-pixel P3, the particle size range of the scattering particles is 440nm~470nm. In this way, scattering patterns 50 of different particle sizes are matched with pixels of different light-emitting colors to achieve the best scattering effect.

[0079] It should be noted that Figure 7 It is a schematic illustration that each sub-pixel P is provided with a scattering pattern 50 . In a specific implementation, the size of the sub-pixel P may be larger than the size of the scattering pattern 50 . In a specific implementation, each sub-pixel P may be provided with a plurality of scattering patterns 50 .

[0080] In one possible implementation, combining Figure 1 or Figure 7 As shown, the display panel further includes a color filter layer 7 ; the scattering layer 5 is located between the optical pattern layer 42 and the color filter layer 7 .

[0081] In one possible implementation, combining Figure 7 As shown, the color filter layer includes a red resistor 71 corresponding to the red pixel P1, a green resistor 72 corresponding to the green pixel, and a blue resistor 73 corresponding to the blue pixel P3.

[0082] In one possible implementation, combining Figure 7 As shown, the display panel further includes a black matrix 8 having a plurality of first openings, and the red resistors 71, the green resistors 72 and the blue resistors 73 are respectively located in the first openings.

[0083] In one possible implementation, combining Figure 7 As shown, the display panel further includes a first pixel defining layer 21 having a plurality of second openings, and the light emitting elements 20 are located in the second openings.

[0084] In a possible implementation, the display panel may further include a second pixel defining layer 9 having a plurality of third openings, and the red quantum dot pattern 411 , the green quantum dot pattern 412 , and the blue quantum dot pattern 413 are respectively located in different third openings.

[0085] In a possible implementation, in the display area of ​​the display panel, an orthographic projection of the second opening on the base substrate 1 at least partially overlaps with an orthographic projection of the third opening on the base substrate 1 .

[0086] In a possible implementation, in the display area of ​​the display panel, when the display panel includes a color filter layer, the orthographic projections of the first opening, the second opening, and the third opening on the base substrate 1 at least partially overlap with each other.

[0087] In one possible implementation, combining Figure 1 and Figure 7 As shown, the display panel may further include an encapsulation layer 3 between the light emitting element 20 and the light conversion structure 4. Specifically, the encapsulation layer 3 may include a first inorganic encapsulation layer 301, an organic encapsulation layer 303, and a second inorganic encapsulation layer 302 which are stacked.

[0088] An embodiment of the present invention further provides a display device, including the display panel provided by the embodiment of the present invention.

[0089] See also Figure 8 As shown, the embodiment of the present invention further provides a method for manufacturing a display panel provided by the embodiment of the present invention, comprising:

[0090] Step S100, forming a plurality of light emitting elements on one side of a base substrate;

[0091] Step S200, forming a light conversion structure on a side of the light emitting element away from the substrate, wherein the light conversion structure includes an optical pattern layer and a color conversion layer that are stacked, the optical pattern layer having a plurality of protrusions on a side away from the light emitting element; and the color conversion layer converts at least part of the light emitted by the light emitting element;

[0092] Step S300, forming a scattering layer including a plurality of mutually spaced scattering patterns on a side of the light conversion structure away from the light emitting element, wherein the scattering pattern includes a matrix and scattering particles distributed in the matrix; in a display area of ​​the display panel, a total area of ​​an orthographic projection of the scattering pattern on the base substrate is smaller than a total area of ​​an orthographic projection of the protrusion on the base substrate.

[0093] The beneficial effects of the embodiments of the present invention are as follows: In the embodiments of the present invention, the display panel includes a scattering layer 5 located on the side of the light conversion structure 4 away from the light emitting element 20, the scattering layer 5 has a plurality of scattering patterns 50 spaced apart from each other, and the total area of ​​the orthographic projection of the scattering pattern 50 on the base substrate 1 is smaller than the total area of ​​the orthographic projection of the protrusion 420 on the base substrate 1, which can partially scatter the incident light from below to compensate for the viewing angle brightness, thereby increasing the viewing angle of the display panel and the contrast at a large viewing angle, while satisfying the front light output efficiency as much as possible, and increasing the viewing angle of the display panel.

[0094] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that: include: A plurality of light emitting elements located on one side of the substrate; A light conversion structure, the light conversion structure is located on a side of the light emitting element away from the base substrate, the light conversion structure comprises an optical pattern layer and a color conversion layer arranged in layers, the optical pattern layer comprises a plurality of protrusions; The color conversion layer performs wavelength conversion on at least part of the light emitted by the light emitting element; A scattering layer, the scattering layer is located on a side of the light conversion structure away from the light emitting element, and includes a plurality of scattering patterns spaced apart from each other, the scattering patterns include a matrix and scattering particles distributed in the matrix; In the display area of ​​the display panel, the total area of ​​the orthographic projections of the scattering patterns on the base substrate is smaller than the total area of ​​the orthographic projections of the protrusions on the base substrate; The scattering layer is used to: scatter incident light to compensate for viewing angle brightness; The ratio of the thickness of the scattering pattern to the maximum thickness of the protrusion is greater than or equal to 0.1 and less than or equal to 0.

5.

2. The display panel according to claim 1, wherein: In a display area of ​​the display panel, an orthographic projection of at least one of the scattering patterns on the base substrate overlaps with an orthographic projection of at least one of the protrusions on the base substrate.

3. The display panel according to claim 2, wherein: An orthographic projection of one of the scattering patterns on the substrate covers an orthographic projection of one of the protrusions on the substrate; Alternatively, the sum of overlapping areas of the plurality of protrusions and the orthographic projection of one scattering pattern on the base substrate is greater than or equal to the area of ​​the orthographic projection of one protrusion on the base substrate.

4. The display panel according to claim 3, wherein: The orthographic projection of the at least one scattering pattern on the substrate covers the orthographic projection of one protrusion on the substrate, and covers at least a portion of the orthographic projection of an adjacent protrusion on the substrate.

5. The display panel according to claim 3, wherein: The scattering pattern has a thickness less than or equal to 5 micrometers.

6. The display panel according to claim 1, wherein: The scattering pattern includes a plurality of scattering pattern bars extending along the first direction and sequentially arranged along the second direction, and transparent bars located between adjacent scattering pattern bars, and the scattering pattern bars and the transparent bars are alternately arranged in the second direction; In a display area of ​​the display panel, an orthographic projection of at least one of the protrusions on the base substrate intersects with an orthographic projection of a plurality of scattering pattern strips on the base substrate.

7. The display panel according to claim 6, characterized in that: In the display area of ​​the display panel, the orthographic projection of each of the protrusions on the base substrate intersects with the orthographic projections of a plurality of scattering pattern strips on the base substrate.

8. The display panel according to claim 6, wherein: The width of the scattering pattern strip in the second direction is the same as the width of the transparent strip in the second direction.

9. The display panel according to claim 1, wherein: In the display area of ​​the display panel, the protrusions are distributed in an array, and the orthographic projection of the scattering pattern on the substrate covers part of the orthographic projection of the protrusions on the substrate; and, in at least part of the display area of ​​the display panel, the protrusions covered by the scattering pattern are uniformly distributed relative to all the protrusions in the at least part of the area.

10. The display panel according to any one of claims 1 to 5 and 9, characterized in that: In each of the scattering patterns, the scattering particles are uniformly distributed in the matrix.

11. The display panel according to any one of claims 1 to 9, characterized in that: In the display area of ​​the display panel, the distribution area of ​​the scattering particles accounts for 10% to 30% of the total area of ​​the scattering layer.

12. The display panel according to any one of claims 1 to 9, characterized in that: The display panel includes a plurality of sub-pixels, the plurality of sub-pixels include red pixels, green pixels and blue pixels; the sub-pixels include a color conversion layer; The color conversion layer includes a red quantum dot pattern corresponding to the red pixel and emitting red light, a green quantum dot pattern corresponding to the green pixel and emitting green light, and a blue quantum dot pattern or a transparent color resist corresponding to the blue pixel; The light emitting element includes an organic light emitting element that emits blue light.

13. The display panel according to claim 12, wherein: The scattering pattern is arranged in at least one of the sub-pixels; when the scattering pattern is arranged in a red sub-pixel, the particle size range of the scattering particles is 625nm to 740nm; when the scattering pattern is arranged in a green sub-pixel, the particle size range of the scattering particles is 490nm to 570nm; when the scattering pattern is arranged in a blue sub-pixel, the particle size range of the scattering particles is 440nm to 470nm.

14. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-13.

15. A method for manufacturing a display panel according to any one of claims 1 to 13, characterized in that: include: forming a plurality of light emitting elements on one side of the base substrate; A light conversion structure is formed on a side of the light emitting element away from the substrate, wherein the light conversion structure comprises an optical pattern layer and a color conversion layer which are stacked, the optical pattern layer comprises a plurality of protrusions; and the color conversion layer converts at least part of the light emitted by the light emitting element; A scattering layer including a plurality of mutually spaced scattering patterns is formed on a side of the light conversion structure facing away from the light emitting element, wherein the scattering pattern includes a matrix and scattering particles distributed in the matrix; and within a display area of ​​the display panel, a total area of ​​an orthographic projection of the scattering pattern on the base substrate is smaller than a total area of ​​an orthographic projection of the protrusion on the base substrate.

Images