Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device. The display panel comprises a substrate, a plurality of pixel units, an encapsulation layer, a first refractive layer, a color film layer and a cover layer. The plurality of pixel units are located on one side of the substrate, the encapsulation layer covers the plurality of pixel units, and the first refractive layer is located on the side of the encapsulation layer away from the substrate. The color film layer is located on the side of the first refractive layer away from the substrate, and the color film layer comprises a plurality of color resistance blocks arranged at intervals, and the plurality of color resistance blocks are arranged correspondingly to the plurality of pixel units. The cover layer is located on the side of the first refractive layer away from the substrate, the cover layer covers the plurality of color resistance blocks and fills the gaps between the plurality of color resistance blocks, the refractive index of the cover layer and / or the color film layer is greater than the refractive index of the first refractive layer, the cover layer comprises a plurality of pixel areas arranged correspondingly to the plurality of color resistance blocks, a plurality of scattering particles are arranged in at least part of the pixel areas, and the plurality of scattering particles are used for changing the transmission direction of light.

Description

TECHNICAL FIELD

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

[0002] With the development of mobile phones and smart mobile terminal devices, users have more and more special-shaped requirements for the form of display devices, such as folding, sliding, and bending with different curvatures. In the related art, a polarizing plate is usually used to realize light filtering and reduce the reflectivity of the display panel. However, the display panel with the polarizing plate structure has poor bending performance and low transmittance (only about 40%), which cannot meet the user's demand for the form of the display device. To solve the above problems, a COE (Color Filter On Encapsulation Layer) structure is used to replace the polarizing plate. The display panel integrated with the COE structure has good bending performance, high transmittance (up to 70% to 80%), and low power consumption.

[0003] The COE structure is to prepare a color film layer and a black matrix layer above the encapsulation layer of the display panel. The black matrix layer is used to reduce the influence of ambient light on the display effect of the display panel and reduce the overall reflectivity of the display panel. However, since the black matrix layer has strong light absorption, part of the light emitted from the inside of the display panel will be absorbed by the black matrix layer, such as the light with a large angle to the normal line of the display panel. When the light is transmitted to the black matrix layer, it will be absorbed by the black matrix layer, resulting in rapid view angle luminance decay of the display panel and affecting the wide view angle display effect of the display panel. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a display panel and a display device to reduce the view angle luminance decay of the display panel, improve the wide view angle display effect of the display panel, and reduce the reflectivity of the display panel. The specific technical solutions are as follows:

[0005] Embodiments of the first aspect of the application provide a display panel, comprising a substrate, a plurality of pixel units, an encapsulation layer, a first refractive layer, a color film layer, and a cover layer; the plurality of pixel units are located on one side of the substrate; the encapsulation layer covers the plurality of pixel units; the first refractive layer is located on a side of the encapsulation layer away from the substrate; the color film layer is located on a side of the first refractive layer away from the substrate, and the color film layer comprises a plurality of color resistance blocks arranged at intervals, and the plurality of color resistance blocks are arranged correspondingly to the plurality of pixel units; the cover layer is located on a side of the first refractive layer away from the substrate, and the cover layer covers the plurality of color resistance blocks and fills gaps between the plurality of color resistance blocks; a refractive index of the cover layer and / or the color film layer is greater than a refractive index of the first refractive layer; the cover layer comprises a plurality of pixel areas arranged correspondingly to the plurality of color resistance blocks, and a plurality of scattering particles are arranged in at least part of the pixel areas, and the plurality of scattering particles are used to change a transmission direction of light.

[0006] In some embodiments, the cover layer further comprises a non-pixel area between adjacent pixel areas, and the non-pixel area comprises a plurality of scattering particles.

[0007] In some embodiments, the display panel further comprises a touch layer, the touch layer is a light-transmitting material, and the touch layer is located between the first refractive layer and the encapsulation layer, or the touch layer is located between the color film layer and the first refractive layer.

[0008] In some embodiments, the pixel unit comprises a transistor and a light-emitting unit electrically connected to the transistor; the display panel further comprises a pixel definition layer, the pixel definition layer comprises a plurality of pixel openings, and a plurality of light-emitting units included in the plurality of pixel units are arranged in the plurality of pixel openings; and the pixel definition layer is a light-blocking material.

[0009] In some embodiments, a refractive index of the first refractive layer is 0.6 to 0.9 times a refractive index of the color film layer, and / or a refractive index of the first refractive layer is 0.6 to 0.9 times a refractive index of the cover layer.

[0010] In some embodiments, a diameter of the scattering particle is less than or equal to 300 nm.

[0011] In some embodiments, a doping concentration of the scattering particle in the cover layer is less than or equal to 2%.

[0012] In some embodiments, a material of the scattering particle comprises TiO2.

[0013] In some embodiments, a thickness of the pixel area of the cover layer is less than or equal to 1 μm.

[0014] The embodiment of the second aspect of the present application provides a display device, which comprises the display panel according to any one of the above.

[0015] The embodiment of the present application has the following beneficial effects:

[0016] In the display panel provided by the embodiment of the present application, the cover layer is used to cover the color resistance blocks and fill the gaps between the color resistance blocks, and the black matrix layer in the display panel is removed, so that the probability of light emitted from the inside of the display panel being absorbed by the black matrix layer is reduced, light at a large angle with respect to the normal line of the display panel can be smoothly emitted through the cover layer and the color film layer, the viewing angle luminance decay of the display panel is reduced, and the wide viewing angle display effect of the display panel is improved. Moreover, since there are a plurality of scattering particles in at least part of the pixel area, when ambient light enters the cover layer, the scattering particles in the cover layer can change the transmission direction of the ambient light, so that the ambient light is transmitted to the color film layer and the first refractive layer below at a plurality of angles. For example, when the ambient light is collimated light, the plurality of scattering particles can change the collimated light into Lambertian distributed light entering the color film layer below the cover layer, so that the light is transmitted to the first refractive layer at a plurality of angles. The light scattered by the scattering particles reaches the first refractive layer after being filtered by the color resistance blocks, and since the refractive index of the cover layer and / or the color film layer is greater than the refractive index of the first refractive layer, part of the light filtered at a large angle with respect to the normal line of the first refractive layer will be totally reflected and re-enter the color film layer. The color resistance blocks can absorb light of different colors from their own color, and since part of the light is totally reflected before and after passing through color resistance blocks of different colors, part of the light is totally reflected and re-enters the color film layer and is then absorbed by the color resistance blocks, so that the emission rate of the reflected light after the ambient light is reflected inside the display panel is reduced, thereby reducing the reflectivity of the display panel. Therefore, the display panel provided by the embodiment of the present application can reduce the viewing angle luminance decay of the display panel, improve the wide viewing angle display effect of the display panel, and reduce the reflectivity of the display panel.

[0017] Of course, implementing any product or method of the present application does not necessarily require all the advantages described above to be achieved at the same time. The above description is only a summary of the technical solutions of the present application, and in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other embodiments can also be obtained from these drawings without creative labor.

[0019] Figure 1 A structural schematic diagram of a display panel in some embodiments of the present application;

[0020] Figure 2 A structural schematic diagram of a display panel in some embodiments of the present application; Figure 1 A sectional view along the direction A-A in some embodiments of the present application;

[0021] Figure 3 A structural schematic diagram of a display panel in some embodiments of the present application; Figure 1 Another sectional view along the direction A-A in some embodiments of the present application;

[0022] Figure 4 A structural schematic diagram of a display panel in some embodiments of the present application; Figure 1 Another sectional view along the direction A-A in some embodiments of the present application;

[0023] Figure 5 A structural schematic diagram of a display panel in some embodiments of the present application; Figure 1 Another sectional view along the direction A-A in some embodiments of the present application;

[0024] Figure 6 A structural schematic diagram of a display panel in some embodiments of the present application; Figure 1 Another sectional view along the direction A-A in some embodiments of the present application;

[0025] 100 - display panel, 1 - substrate, 2 - pixel unit, 20 - transistor, 201 - active layer, 202 - first gate insulating layer, 203 - gate metal layer, 2031 - gate, 204 - second gate insulating layer, 205 - interlayer dielectric layer, 206 - source-drain metal layer, 2061 - source, 2062 - drain, 207 - passivation layer, 208 - planarization layer, 3 - light-emitting unit, 301 - anode layer, 302 - organic light-emitting layer, 303 - cathode layer, 4 - pixel definition layer, 5 - encapsulation layer, 501 - first inorganic encapsulation layer, 502 - second inorganic encapsulation layer, 503 - organic encapsulation layer, 6 - touch layer, 7 - first refractive layer, 8 - color film layer, 80 - color resist block, 80a - red color resist block, 80b - green color resist block, 80c - blue color resist block, 9 - cover layer, 901 - pixel area, 902 - non-pixel area. DETAILED DESCRIPTION

[0026] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," "having" and "with" in the specification and claims hereof, along with their variants, are intended to be equivalent to "including," "comprising," "consisting of," and "with," respectively, and are intended to be inclusive, unless otherwise noted.

[0028] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0029] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0031] In the description of the embodiments of the present application, the term "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection", "fixed", and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] It should be noted that in the drawings, the size of the layers and regions can be exaggerated for clarity. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer, or intervening layers can also be present. In addition, it will also be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or layer, or one or more intervening layers or elements can also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer or element between the two layers or elements, or one or more intervening layers or elements can also be present. Similar reference numerals refer to similar elements throughout.

[0035] In the related art, in order to solve the problem of too fast viewing angle luminance decay of the display panel with the COE structure, and improve the display effect of the display panel, the opening of the black matrix layer is generally made larger. However, due to the limitation of resolution and the gap between pixels, the maximum value of the opening of the black matrix layer is about 6 μm, and it cannot be increased any more. However, when the opening of the black matrix layer is 6 μm, the viewing angle luminance decay of the display panel with the COE structure is still fast, which affects the wide viewing angle display effect of the display panel. The viewing angle luminance decay of the display panel refers to the luminance decay of the display panel during the process that the human eye changes from the normal viewing angle to the side viewing angle relative to the display panel. The wide viewing angle of the display panel refers to the range of viewing angles that can be observed by the human eye on the display panel is large, for example, the display content of the display panel can be clearly observed by the human eye at the normal viewing angle and the side viewing angle.

[0036] To reduce the viewing angle luminance decay of the display panel, improve the wide viewing angle display effect of the display panel, and reduce the reflectivity of the display panel, embodiments of the present application provide a display panel and a display device, which will be described in detail below in combination with the drawings. The display panel can be an electroluminescent display panel or a photoluminescent display panel. In the case of the display panel being an electroluminescent display panel, the electroluminescent display panel can be an OLED (Organic Light-Emitting Diode) or a QLED (Quantum Dot Light Emitting Diodes). In the case of the display panel being a photoluminescent display panel, the photoluminescent display panel can be a quantum dot photoluminescent display panel.

[0037] Embodiments of the first aspect of the present application provide a display panel 100, as shown in Figure 1 and Figure 2 The display panel 100 includes a substrate 1, a plurality of pixel units 2, an encapsulation layer 5, a first refractive layer 7, a color film layer 8, and a cover layer 9. The plurality of pixel units 2 are located on one side of the substrate 1. The encapsulation layer 5 covers the plurality of pixel units 2. The first refractive layer 7 is located on the side of the encapsulation layer 5 away from the substrate 1. The color film layer 8 is located on the side of the first refractive layer 7 away from the substrate 1, and includes a plurality of color resistance blocks 80 arranged at intervals. The plurality of color resistance blocks 80 are arranged correspondingly to the plurality of pixel units 2. The cover layer 9 is located on the side of the first refractive layer 7 away from the substrate 1, and covers the plurality of color resistance blocks 80 and fills the gaps between the plurality of color resistance blocks 80. The refractive index of the cover layer 9 and / or the color film layer 8 is greater than the refractive index of the first refractive layer 7. The cover layer 9 includes a plurality of pixel areas 901 arranged correspondingly to the plurality of color resistance blocks 80. A plurality of scattering particles are arranged in at least part of the pixel areas 901. The plurality of scattering particles are used to change the transmission direction of light.

[0038] In embodiments of the present application, as shown in Figure 2 The encapsulation layer 5 is located on the side of the pixel units 2 away from the substrate 1 and covers the plurality of pixel units 2. The first refractive layer 7, the color film layer 8, and the cover layer 9 are arranged on the encapsulation layer 5. The encapsulation layer 5 can be a thin film encapsulation layer. The encapsulation layer 5 is used to encapsulate the pixel units 2, thereby reducing the probability of failure of the pixel units 2 and the underlying layer structure caused by impurities such as water and oxygen entering the pixel units 2. Optionally, as shown in Figure 2As shown, the encapsulation layer 5 can include a first inorganic encapsulation layer 501, an organic encapsulation layer 503 and a second inorganic encapsulation layer 502 arranged in sequence. The multi-layer structure of the encapsulation layer 5 can increase the airtightness of the encapsulation layer 5, so as to further improve the encapsulation effect of the encapsulation layer 5. Optionally, the materials of the first inorganic encapsulation layer 501 and the second inorganic encapsulation layer 502 are silicon oxide, silicon oxynitride or silicon nitride, etc. The material of the organic encapsulation layer 503 is a fiber material, a resin material or a material for laminated multi-layer board, etc. The material can be set according to actual requirements, which is not limited in the application.

[0039] In the embodiment of the application, the color film layer 8 includes a plurality of color resistance blocks 80 distributed at intervals. Each color resistance block 80 is arranged corresponding to a pixel unit 2, that is, the orthographic projection of each color resistance block 80 on the substrate 1 covers the orthographic projection of the pixel unit 2 corresponding to the color resistance block 80 on the substrate 1, so that the light emitted by the pixel unit 2 can pass through the color resistance block 80 more to be emitted, and the transmittance of the display panel 100 is improved. The color resistance block 80 can be a red color resistance block 80a, a green color resistance block 80b or a blue color resistance block 80c. The color resistance block 80 is used to absorb light of different colors from itself and emit light of the same color as itself to achieve light filtering.

[0040] In the display panel 100 provided in this embodiment, a cover layer 9 is used to cover the color resist blocks 80 and fill the gaps between the multiple color resist blocks 80. Removing the black matrix layer in the display panel 100 reduces the probability of light emitted from inside the display panel 100 being absorbed by the black matrix layer. This allows light rays at a large angle to the normal of the display panel 100 to pass smoothly through the cover layer 9 and the color filter layer 8, reducing the viewing angle brightness attenuation of the display panel 100 and improving the wide viewing angle display effect of the display panel 100. Furthermore, since at least some pixel areas 901 contain multiple scattering particles, when ambient light enters the cover layer 9, the scattering particles in the cover layer 9 can change the transmission direction of the ambient light, causing the ambient light to be transmitted to the lower color filter layer 8 and the first refractive layer 7 at multiple angles. For example, when the ambient light is collimated, the multiple scattering particles can transform the collimated light into a Lambau distribution light that enters the color filter layer 8 below the cover layer 9, thereby causing the light to be transmitted to the first refractive layer 7 at multiple angles. The light scattered by the scattering particles passes through the color resist block 80 and reaches the first refractive layer 7. Since the refractive index of the cover layer 9 and / or the color filter layer 8 is greater than that of the first refractive layer 7, some of the filtered light that forms a large angle with the normal to the first refractive layer 7 undergoes total internal reflection upon entering the first refractive layer 7 and re-enters the color filter layer 8. The color resist block 80 can absorb light of a different color than itself. Because some light undergoes total internal reflection before and after passing through different colored color resist blocks 80, and is absorbed by the color resist block 80 after re-entering the color filter layer 8, the emissivity of reflected light after ambient light is reflected within the display panel 100 is reduced, thereby reducing the reflectivity of the display panel 100. Therefore, the display panel 100 provided in this embodiment can reduce the viewing angle brightness attenuation of the display panel 100, improve the wide viewing angle display effect of the display panel 100, and simultaneously reduce the reflectivity of the display panel 100.

[0041] like Figure 4 As shown, taking 80a as a red color resist, 80b as a green color resist, and 80c as a blue color resist as an example, after the light enters the cover layer 9, it is scattered by the scattering particles in the cover layer 9, causing the light to travel at multiple angles. Some of the light enters the green color resist 80b. After being filtered by the green color resist 80b, the light of other colors is almost absorbed by the green color resist 80b. The green light passes through the green color resist 80b and reaches the first refractive layer 7 below. Total internal reflection occurs on the surface of the first refractive layer 7. After total internal reflection, the green light enters the red color resist 80a adjacent to the green color resist 80b. Since the green light is different in color from the red color resist 80a, the green light is absorbed by the red color resist 80a, thereby reducing the emissivity of the reflected light generated after the ambient light is reflected inside the display panel 100 and reducing the reflectivity of the display panel 100.

[0042] In addition, part of the scattered light that does not undergo total reflection will continue to transmit to the inside of the display panel 100 through the first refractive layer 7, is reflected by part of the film layers in the inside of the display panel 100, is transmitted to the cover layer 9 above again, and is scattered again by the scattering particles in the cover layer 9, thereby further reducing the reflectivity of the display panel 100.

[0043] Optionally, the cover layer 9 is a light-transmitting material, and the cover layer 9 will not shield the light emitted by the plurality of pixel units 2 in the inside of the display panel 100. In addition, the scattering particles in the cover layer 9 are also used to scatter the light when the light is transmitted to the cover layer 9 through the color filter layer 8 from the plurality of pixel units 2, so that the light emitted by the display panel 100 is more uniform. In addition, the cover layer 9 can also be used to fill the gaps between the color resistance blocks 80, thereby improving the flatness of the display panel 100 and facilitating the manufacture of other subsequent film layers of the display panel 100. Optionally, the material of the cover layer 9 includes transparent resin. Optionally, the cover layer 9 and the scattering particles can be prepared by spin coating or the like, for example, the scattering particles can be doped in the coating material before the cover layer 9 is coated, and then the material doped with the scattering particles is coated on the top of the color filter layer 8 to realize the manufacture of the cover layer 9.

[0044] Optionally, the substrate 1 can be a rigid substrate such as a glass substrate, and the like. The substrate 1 can also be a flexible substrate such as a polyimide substrate, and the like, which is not limited in the present application.

[0045] In some embodiments, as shown in FIG. 9, the cover layer 9 also includes a non-pixel area 902 between adjacent pixel areas 901, and the non-pixel area 902 has a plurality of scattering particles. Figure 2

[0046] In the embodiments of the present application, the plurality of scattering particles are arranged in the non-pixel area 902 of the cover layer 9, that is, the plurality of scattering particles are arranged in the entire film layer of the cover layer 9, which can scatter the ambient light through the pixel area 901 and the ambient light through the non-pixel area 902, thereby improving the scattering rate of the ambient light transmitted to the display panel 100 as a whole, further reducing the reflectivity of the display panel 100, and improving the display effect of the display panel 100. Further, arranging the plurality of scattering particles in the non-pixel area 902 can also reduce the manufacturing process of the cover layer 9, simplify the manufacturing process of the display panel 100, and reduce the production cost.

[0047] In some embodiments, as shown in FIG. 9, the non-pixel area 902 does not have a plurality of scattering particles. Figure 3

[0048] In the embodiments of the present application, as shown in FIG. 9, the non-pixel area 902 does not have a plurality of scattering particles. Figure 3 ​​As shown, since the pixel area 901 occupies a large area, setting the scattering particles in the pixel area 901 can achieve the effect of reducing the reflectivity. No scattering particles are set in the non-pixel area 902, so that the light generated inside the display panel 100 can be better emitted, the interference and shielding of the scattering particles on the light generated inside the display panel 100 are reduced, the transmittance of the display panel 100 is improved, and the display effect of the display panel 100 is improved.

[0049] In some embodiments, the refractive index of the first refractive layer 7 is 0.6 to 0.9 times the refractive index of the color film layer 8, and / or the refractive index of the first refractive layer 7 is 0.6 to 0.9 times the refractive index of the cover layer 9.

[0050] In the embodiments of the present application, the refractive index of the first refractive layer 7 is 0.6 to 0.9 times the refractive index of the color film layer 8 and / or the cover layer 9. For example, the refractive index of the first refractive layer 7 can be 0.71 times the refractive index of the color film layer 8 and / or the cover layer 9, which can be set according to actual needs, and the present application does not make any limitation thereon. The refractive index of the first refractive layer 7 is less than the refractive index of the color film layer 8 and / or the cover layer 9, so that when the light enters the first refractive layer 7 through the color film layer 8 and / or the cover layer 9, part of the light can be totally reflected, thereby reducing the probability of the refracted light entering the display panel 100 through the film layers such as the touch layer 6 or the encapsulation layer 5 below the first refractive layer 7 to generate reflected light in the display panel 100, further reducing the reflectivity of the display panel 100, and improving the display effect. Optionally, the refractive index of the first refractive layer 7 can be 1.2 to 1.4, and the refractive index of the color film layer 8 and / or the cover layer 9 can be 1.6 to 1.8.

[0051] In some embodiments, the diameter of the scattering particles is less than or equal to 300 nm.

[0052] In some embodiments, the doping concentration of the scattering particles in the cover layer 9 is less than or equal to 2%.

[0053] In the embodiments of the present application, the diameter of the scattering particles is less than or equal to 300 nm, and the doping concentration of the scattering particles in the cover layer 9 is less than or equal to 2%, so that the scattering particles can scatter the ambient light entering the display panel 100, reduce the reflectivity of the display panel 100, and also reduce the probability of the scattering particles interfering with the light emitted from the inside of the display panel 100 due to the excessive size or excessive number of the scattering particles, thereby reducing the influence of the scattering particles on the transmittance of the display panel 100 and improving the display effect of the display panel 100. In addition, the doping mass percentage of the scattering particles is less than or equal to 2%, so that when the light passes through the cover layer 9, Mie scattering can be formed, the emission rate of the reflected light after the ambient light is reflected inside the display panel 100 is reduced, and the reflectivity of the display panel 100 is reduced.

[0054] In some embodiments, the material of the scattering particles includes TiO2.

[0055] In the embodiments of the present application, the titanium dioxide is an inorganic component, which has excellent chemical stability, thermal stability, non-migration property and good dispersibility, can make the scattering particles more uniformly distributed in the cover layer 9, make the scattering particles have better scattering effect, thereby further reduce the reflectivity of the display panel 100 and improve the display effect of the display panel 100. Alternatively, the scattering particles can also be other materials, which can be set according to actual needs, can scatter and change the transmission direction of the ambient light entering the cover layer 9, and the present application does not make any limitation.

[0056] In some embodiments, the thickness of the pixel area 901 of the cover layer 9 is less than or equal to 1 μm.

[0057] In the embodiments of the present application, the thickness of the pixel area 901 of the cover layer 9 is less than or equal to 1 μm, which not only can make the display panel 100 have higher transmittance and better optical performance, but also can reduce the film thickness of the display panel 100, which is conducive to the thinning of the display panel 100 and reduces the cost.

[0058] In some embodiments, as shown in Figure 4 and Figure 5 The display panel 100 further includes a touch layer 6, the touch layer 6 is a light-transmitting material, and the touch layer 6 is located between the first refractive layer 7 and the encapsulation layer 5, or the touch layer 6 is located between the color film layer 8 and the first refractive layer 7.

[0059] In the embodiments of the present application, as shown in Figure 4 Since the touch layer 6 is a light-transmitting material, the light rays that do not occur total reflection on the surface of the first refractive layer 7, such as the light rays with an incident angle less than 45 degrees entering the first refractive layer 7, can pass through the touch layer 6 and reach the pixel definition layer 4 and other layer structures below the touch layer 6. As shown in Figure 4 After the light rays pass through the touch layer 6 and reach below the touch layer 6, part of the light rays are absorbed by the pixel definition layer 4 and other layer structures below the touch layer 6, only a small part of the light rays are reflected by the anode layer 301 and the cathode layer 303 and other structures, and then exit after being filtered by the color film layer 8 again, which can further reduce the exit rate of the reflected light after the ambient light is reflected inside the display panel 100, and reduce the reflectivity of the display panel 100.

[0060] Alternatively, the material of the touch layer 6 can be transparent metal oxide, such as indium tin oxide, indium zinc oxide, etc.

[0061] In some embodiments, the touch layer 6 can be a lightproof film layer. After the light filtered by the color film layer 8 passes through the first refractive layer 7, the light is reflected on the surface of the touch layer 6, so that part of the light enters the color resist block 80 with a different color from itself and is absorbed by the color resist block 80. This can further reduce the reflectivity of the reflected light in the display panel 100 after the ambient light is reflected inside the display panel 100, and reduce the reflectivity of the display panel 100. Optionally, when the touch layer 6 is a lightproof film layer, the material of the touch layer 6 can be copper, aluminum or an alloy containing copper or aluminum.

[0062] Optionally, the position of the first refractive layer 7 is related to the light transmission performance of the touch layer 6. Specifically, as shown in Figure 4 and Figure 5 When the touch layer 6 is a light-transmitting material, the first refractive layer 7 can be arranged between the touch layer 6 and the encapsulation layer 5, or between the color film layer 8 and the touch layer 6. When the touch layer 6 is a lightproof material, as shown in Figure 4 , the first refractive layer 7 is arranged between the color film layer 8 and the touch layer 6.

[0063] In some embodiments, as shown in Figure 2 and Figure 6 , the pixel unit 2 includes a transistor 20 and a light emitting unit 3 electrically connected to the transistor 20; the display panel 100 further includes a pixel defining layer 4, the pixel defining layer 4 includes a plurality of pixel openings, and the plurality of light emitting units 3 included in the plurality of pixel units 2 are arranged in the plurality of pixel openings. The pixel defining layer 4 is a lightproof material.

[0064] In the embodiments of the present application, as shown in Figure 2 and Figure 6 , the pixel defining layer 4 forms a plurality of pixel openings through its recessed structure, and each light emitting unit 3 is located in a pixel opening to separate adjacent light emitting units 3 and reduce optical crosstalk between adjacent light emitting units 3. The pixel defining layer 4 is a lightproof material, which can improve the light absorption of the pixel defining layer 4, reduce the reflectivity of the display panel 100, further reduce the optical crosstalk between adjacent light emitting units 3, and improve the display effect of the display panel 100.

[0065] In the embodiments of the present application, as shown in Figure 4As shown, after scattering by the scattering particles, part of the light that does not undergo total reflection on the surface of the first refractive layer 7, such as light with an incident angle less than 45 degrees entering the first refractive layer 7, can pass through the touch layer 6 and the encapsulation layer 5 and reach the pixel defining layer 4 and the light emitting unit 3 and other structures below the touch layer 6. After the light passes through the touch layer 6 and reaches the structures below the touch layer 6, part of the light is absorbed by the pixel defining layer 4 below the touch layer 6, part of the light transmits through the cathode layer 303 to the organic light emitting layer 302 and is absorbed by the organic light emitting layer 302, and a small part of the light is reflected by the anode layer 301 and the cathode layer 303 and other structures, then exits after being filtered by the color filter layer 8 again, so that the emission rate of the reflected light after the ambient light is reflected inside the display panel 100 is further reduced, and the reflectivity of the display panel 100 is further reduced.

[0066] Further, when the transistor 20 does not drive the light emitting unit 3 to emit light, the light entering the display panel 100 from the non-pixel area 902 of the cover layer 9 is absorbed by the pixel defining layer 4 below the lower layer structure, so that reflection does not occur again, the reflected light does not exit the display panel 100, the reflectivity of the display panel 100 is further reduced, and the integrity of the display area and the non-display area of the display panel 100 is improved.

[0067] In the embodiment of the present application, as shown in Figure 6 When the display panel 100 is an OLED display panel 100 with a self-luminous function, the light emitting unit 3 includes the anode layer 301, the organic light emitting layer 302 and the cathode layer 303 arranged in turn from bottom to top, and the anode layer 301 and the organic light emitting layer 302 of each light emitting unit 3 can be separated by the pixel defining layer 4, and the cathode layer 303 of each light emitting unit 3 or the cathode layer 303 of some light emitting units 3 can be integrated to have the same potential. The plurality of light emitting units 3 can include a plurality of red light emitting units, a plurality of green light emitting units and a plurality of blue light emitting units. The plurality of red color blocks 80a are arranged corresponding to the plurality of red light emitting units, the plurality of green color blocks 80b are arranged corresponding to the plurality of green light emitting units, and the plurality of blue color blocks 80c are arranged corresponding to the plurality of blue light emitting units.

[0068] In the embodiment of the present application, the pixel unit 2 includes the transistor 20 and the light emitting unit 3 electrically connected to the transistor 20, and each transistor 20 and the light emitting unit 3 are arranged corresponding to each other and are electrically connected, and each transistor 20 is used to drive the light emitting unit 3 above the transistor 20 to emit light. The display panel 100 can be a top gate structure, and the display panel 100 can also be a bottom gate structure or a double gate structure, which is not limited in the present application. As shown in Figure 6As shown, taking the top-gate structure of the display panel 100 as an example, the transistor 20 includes, in sequence from the direction away from the substrate 1, an active layer 201, a first gate insulating layer 202, a gate metal layer 203, a second gate insulating layer 204, an interlayer dielectric layer 205, and a source-drain metal layer 206, the source-drain metal layer 206 including a source 2061 and a drain 2062. The anode layer 301 is connected to the source 2061 or the drain 2062 of the transistor 20 through a via, and the source 2061 or the drain 2062 is connected to the active layer 201 through a via. The anode layer 301 can be electrically connected to or used as a pixel electrode, and the cathode layer 303 can be electrically connected to or used as a common electrode. The materials of the anode layer 301 and the cathode layer 303 can include transparent metal oxides such as indium zinc oxide (IZO), indium tin oxide (ITO), etc., and can also include metal materials such as copper, aluminum, silver, or alloy materials containing the above metal materials, etc., which can be set according to actual needs, and the present application does not make any limitation in this regard.

[0069] In the embodiments of the present application, the materials of the gate metal layer 203 and the source-drain metal layer 206 can include metal materials such as copper, aluminum, silver, or alloy materials containing the above metal materials. The materials of the first gate insulating layer 202 and the second gate insulating layer 204 can include inorganic insulating materials such as silicon oxide, silicon nitride, silicon oxynitride, etc., or can include organic insulating materials such as polyimide, polyphthalimide, polyphthalamide, acrylic resin, benzocyclobutene, or phenolic resin, etc. Optionally, the gate 2031 can have a laminated structure of a copper layer and a molybdenum-niobium layer, and the molybdenum-niobium layer is used to protect the copper layer. In addition, the source 2061 and the drain 2062 can also each include a copper layer and a molybdenum-niobium layer for protecting the copper layer, and similarly, the molybdenum-niobium layer has a protective effect on the copper layer, which can reduce the probability of corrosion of the copper layer.

[0070] In the embodiments of the present application, as shown in Figure 5 and Figure 6 The display panel 100 further includes a planarization layer 208, which is used to improve the flatness of the pixel unit 2 away from the substrate 1, and facilitate the subsequent manufacturing of the film layer structure of the pixel definition layer 4, etc. Further, the display panel 100 further includes a passivation layer 207, which is arranged below the planarization layer 208, and is used to protect the underlying other layer structures and delay the corrosion rate of the source-drain metal layer 206, etc. The planarization layer 208 is provided with a via, the via penetrating through the passivation layer 207 and the planarization layer 208, and the anode layer 301 is arranged above the planarization layer 208, and the anode layer 301 can be electrically connected to the source 2061 or the drain 2062 of the source-drain metal layer 206 through the via on the planarization layer 208. Specifically, as shown in Figure 6 The anode layer 301 is connected to the drain 2062 through the via.

[0071] Embodiments of the second aspect of the present application provide a display device, the display device comprising the display panel 100 of any of the above.

[0072] In the embodiments of the present application, the display device comprises the display panel 100 in any of the above embodiments. The display device includes but is not limited to mobile phones, tablet computers, displays, televisions, picture screens, advertising screens, electronic paper, etc. Since the display device comprises the display panel 100 described above, the display device has all the advantages of the display panel 100 described above.

[0073] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel (100), characterized by The display panel (100) comprises: a substrate (1) and a plurality of pixel units (2) located on one side of the substrate (1); an encapsulation layer (5) covering the plurality of pixel units (2); a first refractive layer (7) located on a side of the encapsulation layer (5) away from the substrate (1); a color filter layer (8) located on a side of the first refractive layer (7) away from the substrate (1), the color filter layer (8) comprising a plurality of color resistance blocks (80) arranged at intervals, the plurality of color resistance blocks (80) being arranged correspondingly to the plurality of pixel units (2); a cover layer (9) located on a side of the first refractive layer (7) away from the substrate (1), the cover layer (9) covering the plurality of color resistance blocks (80) and filling the gaps between the plurality of color resistance blocks (80), the cover layer (9) and / or the color filter layer (8) having a refractive index greater than that of the first refractive layer (7), the cover layer (9) comprising a plurality of pixel areas (901) arranged correspondingly to the plurality of color resistance blocks (80), at least part of the pixel areas (901) having a plurality of scattering particles for changing the transmission direction of light.

2. The display panel (100) according to claim 1, characterized in that, The cover layer (9) further comprises non-pixel areas (902) between adjacent pixel areas (901), the non-pixel areas (902) having a plurality of scattering particles.

3. The display panel (100) according to claim 1, characterized in that, The display panel (100) further comprises a touch layer (6) made of a light-transmitting material, the touch layer (6) being located between the first refractive layer (7) and the encapsulation layer (5), or the touch layer (6) being located between the color filter layer (8) and the first refractive layer (7).

4. The display panel (100) according to claim 3, characterized in that, The pixel unit (2) comprises a transistor (20) and a light-emitting unit (3) electrically connected to the transistor (20); the display panel (100) further comprises a pixel definition layer (4) comprising a plurality of pixel openings, the plurality of light-emitting units (3) comprised by the plurality of pixel units (2) being arranged in the plurality of pixel openings, the pixel definition layer (4) being made of a light-blocking material.

5. The display panel (100) according to claim 1, characterized in that, The refractive index of the first refractive layer (7) is 0.6 to 0.9 times the refractive index of the color filter layer (8), and / or the refractive index of the first refractive layer (7) is 0.6 to 0.9 times the refractive index of the cover layer (9).

6. The display panel (100) according to claim 1, characterized in that, The diameter of the scattering particles is less than or equal to 300 nm.

7. The display panel (100) according to claim 1, characterized in that, The doping concentration of the scattering particles in the cover layer (9) is less than or equal to 2%.

8. The display panel (100) according to claim 1, characterized in that, The material of the scattering particles comprises TiO2.

9. The display panel (100) according to claim 1, characterized in that, The thickness of the pixel area (901) of the cover layer (9) is less than or equal to 1 µm.

10. A display device, characterized by comprising: The display device comprises the display panel (100) according to any one of claims 1 to 9.

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