Display module and display device

Abstract

Disclosed in embodiments of the present application are a display module and a display device. The display module comprises a display panel, a diffusion layer, and a cover plate, wherein the diffusion layer is arranged on an emergent light side of the display panel, and the diffusion layer is configured to diffuse emergent light of the display panel. The cover plate is provided on the side of the diffusion layer distant from the display panel, and the surface of the cover plate distant from the display panel is a textured surface.

Description

Display modules and display devices

[0001] This application claims priority to Chinese patent application No. 202411975114.8, filed on December 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, specifically to a display module and display device. Background Technology

[0003] Glare is caused by specular reflection from the module cover surface, which significantly reduces screen visibility and has long-term effects on eye health. To suppress glare, the surface of the cover is usually textured.

[0004] However, the inventors of this application discovered that the use of a textured cover plate in the display module would result in a flickering problem. A flickering is a phenomenon in which colored dots are unevenly distributed on the display screen as observed by the human eye.

[0005] The reason is that the texturing process causes irregular undulations on the cover surface, and the light emitted by the pixels is scattered unevenly on the textured surface, resulting in uneven distribution of light intensity and color, which causes the user to see flashing spots when viewing the screen. Invention Overview

[0006] This application provides a display module and display device that can improve flicker point.

[0007] On one hand, embodiments of this application provide a display module, which includes:

[0008] Display panel;

[0009] A diffusion layer is disposed on the light-emitting side of the display panel, and the diffusion layer is configured to diffuse the emitted light of the display panel;

[0010] A cover plate is disposed on the side of the diffusion layer away from the display panel, and the surface of the cover plate away from the display panel is a textured surface.

[0011] On the other hand, embodiments of this application also provide a display device, including a display module as described in any of the above embodiments. Attached Figure Description

[0012] Figure 1 is a schematic diagram of the structure of the display module provided in an embodiment of this application;

[0013] Figure 2 is a schematic diagram of the diffusion layer in the display module provided in the embodiment of this application;

[0014] Figure 3 is a light intensity ratio curve when the maximum diffusion angle of a non-diffusion point light source propagating in a straight line through the diffusion layer of this application is 5 degrees.

[0015] Figure 4 is a schematic diagram of the structure of the feature body of the diffusion layer in the display module provided in the embodiment of this application;

[0016] Figure 5 is a schematic diagram of another structure of the display module provided in an embodiment of this application;

[0017] Figure 6 is a schematic diagram of the structure of the display device provided in an embodiment of this application. Embodiments of the present invention

[0018] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific implementation methods described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, the embodiments can be combined with each other but will not be described in detail one by one. Unless otherwise stated, the directional terms such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device; the terms "first", "second", "third", etc. are only used as markings and do not impose numerical requirements or establish a sequence.

[0019] This application provides a display module and a display device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0020] This application provides a display module, which includes:

[0021] Display panel;

[0022] A diffusion layer is disposed on the light-emitting side of the display panel, and the diffusion layer is configured to diffuse the emitted light of the display panel;

[0023] A cover plate is disposed on the side of the diffusion layer away from the display panel, and the surface of the cover plate away from the display panel is a textured surface.

[0024] Optionally, in some embodiments of this application, the diffusion layer includes a light-transmitting layer and a plurality of features disposed within the light-transmitting layer;

[0025] Wherein, the feature body is a scattering particle, and / or, the refractive index of the feature body is greater than the refractive index of the light-transmitting layer.

[0026] Optionally, in some embodiments of this application, the transmittance of the diffusion layer at all angles is greater than or equal to 85%.

[0027] Optionally, in some embodiments of this application, the light intensity of a non-diffusing point light source propagating in a straight line through the diffusion layer at the maximum diffusion angle is I (max°), and the light intensity of a non-diffusing point light source propagating in a straight line through the diffusion layer at a 0-degree angle is I (0°).

[0028] Where I(max°) / I(0°)≥0.5.

[0029] Optionally, in some embodiments of this application, the maximum diffusion angle of a linearly propagating non-diffusing point light source through the diffusion layer is between 4 degrees and 16 degrees.

[0030] Optionally, in some embodiments of this application, the diffusion layer is an optical adhesive layer, and the diffusion layer connects the display panel and the cover plate.

[0031] Optionally, in some embodiments of this application, the display module further includes at least three light-transmitting functional layers located between the cover plate and the display panel, and one of the at least three light-transmitting functional layers is reused as the diffusion layer.

[0032] Optionally, in some embodiments of this application, the diffusion layer is reused as at least one of an ultraviolet light blocking layer and a blue light absorbing layer.

[0033] Optionally, in some embodiments of this application, the diffusion layer is reused as an ultraviolet light blocking layer, and the feature body includes a core and a shell enclosing the core, wherein the material of the core includes an ultraviolet shielding material.

[0034] Optionally, in some embodiments of this application, the diffusion layer is also reused as a blue light absorption layer, the feature body includes a core and a shell enclosing the core, the shell includes an inorganic blue light absorbing material, and the core is made of the ultraviolet shielding material.

[0035] Optionally, in some embodiments of this application, the at least three light-transmitting functional layers include a first optical adhesive layer, a protective layer, and a second optical adhesive layer, wherein the first optical adhesive layer is disposed between the protective layer and the display panel, and the second optical adhesive layer is disposed between the protective layer and the cover plate;

[0036] One of the first optical adhesive layer, the protective layer, and the second optical adhesive layer is reused as the diffusion layer.

[0037] Optionally, in some embodiments of this application, at least one of the first optical adhesive layer, the protective layer, and the second optical adhesive layer is reused as an ultraviolet light blocking layer, wherein an ultraviolet light shielding material is disposed within the ultraviolet light blocking layer.

[0038] Optionally, in some embodiments of this application, the ultraviolet light blocking layer has a set light transmittance Tr of 380 nanometers, where Tr ≤ 10%.

[0039] Optionally, in some embodiments of this application, the display panel includes an electroluminescent substrate and a color filter layer, the color filter layer being disposed on the light-emitting side of the electroluminescent substrate, and the first optical adhesive layer being disposed between the protective layer and the color filter layer.

[0040] Optionally, in some embodiments of this application, the electroluminescent substrate includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, wherein the area of ​​the blue sub-pixel is larger than the area of ​​the red sub-pixel and the area of ​​the green sub-pixel;

[0041] At least one of the first optical adhesive layer, the protective layer, and the second optical adhesive layer is reused as a blue light absorbing layer, wherein the blue light absorbing layer is doped with a blue light absorbing material.

[0042] Optionally, in some embodiments of this application, the blue light absorption layer has a transmittance yellow value YI, where YI ≥ 2.

[0043] Accordingly, this application also provides a display device, including a display module as described in any of the above embodiments.

[0044] The display module and display device of this application embodiment include a display panel, a diffusion layer, and a cover plate. The diffusion layer is disposed on the light-emitting side of the display panel and is configured to diffuse the emitted light from the display panel. The cover plate is disposed on the side of the diffusion layer away from the display panel, and the surface of the cover plate away from the display panel is a textured surface.

[0045] It should be noted that when the emitted light from the display panel passes through the diffusion layer, the emitted light is dispersed by the diffusion layer. When the dispersed light radiates onto the textured surface of the cover plate, it is relatively uniform, thereby reducing the degree of uneven scattering and achieving the effect of improving the flash point.

[0046] Referring to Figure 1, this application embodiment provides a display module 100, which includes a display panel 11, a diffusion layer 12, and a cover plate 13.

[0047] A diffusion layer 12 is disposed on the light-emitting side of the display panel 11, and the diffusion layer 12 is configured to diffuse the emitted light from the display panel 11. A cover plate 13 is disposed on the side of the diffusion layer 12 away from the display panel 11. The surface of the cover plate 13 away from the display panel 11 is a textured surface.

[0048] It should be noted that when the emitted light from the display panel 11 passes through the diffusion layer 12, the emitted light is dispersed by the diffusion layer 12. When the dispersed light radiates onto the textured surface of the cover plate 13, it is relatively uniform, thereby reducing the degree of uneven scattering and achieving the effect of improving the flash point.

[0049] It is important to understand that textured cover plates refer to the process of applying a texture to the surface of a cover plate. This process can be carried out by mechanical, chemical, or physical methods to create patterns, lines, or textures on the surface of the cover plate in order to increase its wear resistance and fingerprint resistance.

[0050] Optionally, the textured surface of the cover plate 13 is a rough surface, with a root mean square roughness between 0.1 micrometers and 0.5 micrometers, such as 0.1 micrometers, 0.2 micrometers, 0.3 micrometers, 0.4 micrometers, or 0.5 micrometers. It is understood that the greater the root mean square roughness of the textured surface, the stronger its irregular scattering. Therefore, setting the root mean square roughness of the textured surface below 0.5 micrometers reduces the degree of irregular scattering, thereby improving the flash point problem.

[0051] Optionally, the display panel 11 can be an organic light-emitting diode (OLED) panel, a quantum dot OLED panel, a micro OLED panel, a sub-millimeter-level OLED panel, a liquid crystal display panel, or an electrophoretic display panel, etc. The following explanation uses an organic light-emitting diode (OLED) panel as an example.

[0052] Optionally, in some embodiments of this application, please refer to FIG2, which shows a schematic diagram of the structure of the diffusion layer 12 of the display module 100 according to an embodiment of this application. The diffusion layer 12 includes a light-transmitting layer 121 and a plurality of features 122 disposed within the light-transmitting layer 121.

[0053] In some embodiments, feature 122 is a scattering particle. Optionally, the material of feature 122 may be one or more of titanium dioxide, silicon dioxide, polystyrene, and acrylic resin.

[0054] Optionally, the light-transmitting layer 121 can be a photocurable material, a thermocurable material, or other materials with light-transmitting properties, such as polymethyl methacrylate (PMMA), polycarbonate (PC), polystyrene (PS), styrene-methyl methacrylate copolymer (MS), polyethylene terephthalate (PET), acrylic epoxy resin, epoxy resin, polyurethane acrylate resin, polyester acrylate, epoxy acrylate, modified epoxy acrylate, or aliphatic polyurethane hexaacrylate, etc.

[0055] Optionally, in some embodiments, the refractive index of the scattering particles is greater than that of the light-transmitting layer 121. It is understood that the refractive index of the scattering particles is greater than that of the light-transmitting layer 121, so that the contact interface between the scattering particles and the light-transmitting layer 121 forms a total internal reflection interface, thereby improving the scattering effect of the diffusion layer 12.

[0056] Optionally, in some embodiments, the refractive index of the feature 122 is greater than that of the light-transmitting layer 121. That is, the scattering particles are replaced by the feature 122 with a high refractive index. It is understood that the contact interface between the feature with a high refractive index and the light-transmitting layer 121 with a low refractive index is a total internal reflection interface. Therefore, when light radiates to the total internal reflection interface, light rays with an incident angle greater than a certain angle will undergo total internal reflection at the total internal reflection interface, and the direction of light propagation will be greatly changed to achieve the effect of diffused and uniform light.

[0057] Optionally, both the feature 122 and the light-transmitting layer 121 can be photocurable materials, with the photocuring wavelength for forming the feature 122 differing from that for forming the light-transmitting layer 121. During the preparation of the diffusion layer 12, a high-refractive-index material and a low-refractive-index material are first mixed. Then, the high-refractive-index material is cured using a first light wavelength to form the feature 122, and the low-refractive-index material is cured using a second light wavelength to form the light-transmitting layer 121. Alternatively, both light wavelengths can be used simultaneously to cure the low-refractive-index material and the high-refractive-index material.

[0058] Alternatively, a mixture of pre-cured high-refractive-index material and uncured low-refractive-index material can be used to control the distribution of the high-refractive-index material, and then the two materials can be cured separately to form feature 122 and light-transmitting layer 121. Of course, two different optical wavelengths can also be used to cure the low-refractive-index material and the high-refractive-index material simultaneously.

[0059] Understandably, the way the feature body 122 and the light-transmitting layer 121 are integrally connected improves the stability of the diffusion layer 12.

[0060] Optionally, in some embodiments of this application, the transmittance of the diffusion layer 12 at all angles is greater than or equal to 85% to ensure the light output brightness of the display module 100.

[0061] Optionally, in some embodiments of this application, the light intensity of a non-diffusing point light source propagating in a straight line through the diffusion layer 12 at the maximum diffusion angle is I (max°), and the light intensity of a non-diffusing point light source propagating in a straight line through the diffusion layer 12 at a 0-degree angle is I (0°).

[0062] Where I(max°) / I(0°)≥0.5.

[0063] It is understandable that the maximum diffusion angle is the diffusion angle on one side. For example, if the maximum diffusion angle is 5 degrees, it means that the horizontal viewing angle can be expanded by 5 degrees to the left and right at the same time, that is, the total viewing angle is 10 degrees.

[0064] Secondly, the larger the light intensity ratio I(max°) / I(0°), the more uniform the intensity distribution of the diffused light. Therefore, I(max°) / I(0°) ≥ 0.5 to avoid excessively low light intensity for large-angle light rays, thereby reducing the degree of non-uniform scattering.

[0065] Optionally, in some embodiments of this application, the maximum diffusion angle of the non-diffusive point light source propagating in a straight line through the diffusion layer 12 is between 4 degrees and 16 degrees, for example, it can be 4 degrees, 5 degrees, 6 degrees, 7 degrees, 8 degrees, 9 degrees, 10 degrees, 11 degrees, 12 degrees, 13 degrees, 14 degrees, 15 degrees or 16 degrees.

[0066] It is understandable that the larger the diffusion angle of the diffusion layer 12, the higher the proportion of feature bodies 122 required, and the greater the haze of the diffusion layer 12, which has a greater impact on the light intensity of light at a 0-degree angle. Therefore, in order to balance the output brightness at the positive viewing angle and the uniformity of light intensity after diffusion, the maximum diffusion angle of the diffusion layer 12 is set between 4 degrees and 16 degrees.

[0067] Optionally, based on the high-resolution architecture of the display module 100, the maximum diffusion angle of the non-diffuse point light source propagating in a straight line through the diffusion layer 12 is between 4 and 6 degrees, so as to balance display clarity and uniformity of light intensity after diffusion.

[0068] Please refer to Figure 3, which is a light intensity ratio curve when the maximum diffusion angle of a non-diffusing point light source propagating in a straight line through the diffusion layer 12 is 5 degrees. According to Figure 3, when the light angle is 5 degrees, the light intensity ratio I(5°) / I(0°) is the smallest, and when the light angle is 0 degrees, the light intensity ratio I(0°) / I(0°) is the largest.

[0069] Optionally, in some embodiments, the display module 100 may further include at least three light-transmitting functional layers located between the cover plate 13 and the display panel 11, one of the at least three light-transmitting functional layers being reused as the diffusion layer 12.

[0070] It is understandable that the light-transmitting functional layer is reused as the diffusion layer 12, so that there is no need to set an additional diffusion layer 12, thus achieving the effect of thinning the display module 100.

[0071] Alternatively, the light-transmitting functional layer may be at least one of an optical adhesive layer, a protective layer, an antireflective film, an anti-reflective film, and an insulating layer of a touch device film, but is not limited thereto.

[0072] Optionally, in some embodiments of this application, one of the at least three light-transmitting functional layers is simultaneously reused as at least one of an ultraviolet light blocking layer and a blue light absorbing layer, as well as a diffusion layer 12; that is, the diffusion layer 12 is reused as at least one of an ultraviolet light blocking layer and a blue light absorbing layer. The light-transmitting functional layer has different diffusion layer 12 structures to correspond to different functional requirements, which will be described in detail below.

[0073] Optionally, referring to Figure 4, in some embodiments of this application, the diffusion layer 12 is reused as an ultraviolet light blocking layer, and the feature body 122 includes a core 12a and a shell 12b enclosing the core 12a. The material of the core 12a includes an ultraviolet shielding material.

[0074] It should be noted that, in some embodiments, the feature body 122 has a double-layer transparent structure, which gives it a double scattering effect and improves the diffusion effect, while the ultraviolet light shielding material of the core 12a can block ultraviolet light. Therefore, the diffusion layer 12 not only blocks ultraviolet light but also further improves the light diffusion performance.

[0075] Secondly, in some embodiments, the refractive index of the core 12a is greater than that of the shell 12b, the refractive index of the shell 12b is greater than that of the light-transmitting layer 121, and the feature 122 has a double-layer light-transmitting structure, which enables the feature 122 to have a double total internal reflection effect, improving the diffusion effect. Meanwhile, the ultraviolet light shielding material of the core 12a can block ultraviolet light. Therefore, the diffusion layer 12 not only blocks ultraviolet light but also further improves the light diffusion performance.

[0076] Optionally, in some embodiments of this application, the diffusion layer 12 is also reused as a blue light absorbing layer, and the feature body 122 includes a core 12a and a shell 12b enclosing the core 12a. The shell 12b includes a blue light absorbing material, and the material of the core 12a includes an ultraviolet shielding material.

[0077] It should be noted that, in some embodiments, the feature body 122 has a double-layer light-transmitting structure formed by the shell 12b and the core 12a, which gives the feature body 122 a dual scattering effect, improving the diffusion effect. The blue light absorbing material of the shell 12b can absorb blue light, while the ultraviolet light shielding material of the core 12a can block ultraviolet light. Therefore, the diffusion layer 12 not only blocks ultraviolet light and absorbs blue light, but also further improves the light diffusion performance.

[0078] Secondly, in some embodiments, based on the fact that the refractive index of the core 12a is greater than that of the shell 12b, the refractive index of the shell 12b is greater than that of the light-transmitting layer 121, and the feature 122 has a double-layer light-transmitting structure formed by the shell 12b and the core 12a, the feature 122 has a double total internal reflection effect, which improves the diffusion effect. The blue light absorbing material of the shell 12b can absorb blue light, and the ultraviolet light shielding material of the core 12a can block ultraviolet light. Therefore, the diffusion layer 12 not only blocks ultraviolet light but also further improves the light diffusion performance.

[0079] Optionally, in some embodiments of this application, the at least three light-transmitting functional layers include a first optical adhesive layer 10a, a protective layer 10c, and a second optical adhesive layer 10b. The first optical adhesive layer 10a is disposed between the protective layer 10c and the display panel 11, and the second optical adhesive layer 10b is disposed between the protective layer 10c and the cover plate 13.

[0080] One of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the diffusion layer 12.

[0081] It should be noted that one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the diffusion layer 12. That is, the first optical adhesive layer 10a can be the diffusion layer 12; or the protective layer 10c can be the diffusion layer 12, as shown in Figure 1; or the second optical adhesive layer 10b can be the diffusion layer 12.

[0082] In some embodiments, the first optical adhesive layer 10a or the second optical adhesive layer 10b is a diffusion layer 12, and the first optical adhesive layer 10a or the second optical adhesive layer 10b is a composite adhesive layer. The colloid in the first optical adhesive layer 10a or the second optical adhesive layer 10b is a light-transmitting layer 121, and the feature body 122 is mixed within the colloid.

[0083] In some embodiments, the protective layer 10c is a diffusion layer 12, and the protective layer 10c is a composite film layer. The protective layer 10c simultaneously possesses light diffusion function, good wear resistance, and impact resistance.

[0084] It is understandable that, since the protective layer 10c is formed as a separate film, reusing the protective layer 10c as the diffusion layer 12 can better control the diffusion degree of the diffusion layer 12. In addition, since the hardness of the feature body 122 is greater than that of the light-transmitting layer 121, the addition of the feature body 122 can improve the hardness of the film, thereby improving the wear resistance and impact resistance.

[0085] Optionally, in some embodiments of this application, at least one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as an ultraviolet light blocking layer, wherein an ultraviolet light shielding material is disposed within the ultraviolet light blocking layer.

[0086] It is understood that the ultraviolet light blocking layer can block ultraviolet light to reduce the risk of degradation of the display module 100.

[0087] Optionally, the ultraviolet shielding material includes organic ultraviolet absorbers, nano-inorganic ultraviolet reflectors, or a combination of both. The organic ultraviolet absorbers may be selected from phenyl salicylate, UV-O, UV-P, UV-9, UV-321, UV-531, RMB, or photosensitive color-changing MC powder; the nano-inorganic ultraviolet reflectors may be selected from nano-silica, nano-titanium dioxide, nano-zinc oxide, pearlescent powder, talc, or magnesium oxide.

[0088] It is understood that, based on the fact that one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the diffusion layer 12, and at least one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the ultraviolet light blocking layer, therefore, in some embodiments, one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b may combine light diffusion and ultraviolet light blocking functions. For example, the protective layer 10c may be reused as both the diffusion layer 12 and the ultraviolet light blocking layer. However, it is not limited to this; for example, either the first optical adhesive layer 10a or the second optical adhesive layer 10b may be reused as both the diffusion layer 12 and the ultraviolet light blocking layer.

[0089] Taking the protective layer 10c as both a diffusion layer 12 and an ultraviolet light blocking layer as an example, it can also be said that the diffusion layer 12 integrates both protective and ultraviolet light blocking functions. As shown in Figure 4, the feature body 122 includes a core 12a and a shell 12b enclosing the core 12a. The material of the core 12a includes the ultraviolet shielding material.

[0090] It should be noted that, in some embodiments, the feature 122 has a double-layer transparent structure, which gives it a double scattering effect and improves the diffusion effect, while the ultraviolet light shielding material of the core 12a can block ultraviolet light. Therefore, the protective layer 10c not only blocks ultraviolet light but also further improves the light diffusion performance.

[0091] Secondly, in some embodiments, the refractive index of the core 12a is greater than that of the shell 12b, the refractive index of the shell 12b is greater than that of the light-transmitting layer 121, and the feature 122 has a double-layer light-transmitting structure, which enables the feature 122 to have a double total internal reflection effect, improving the diffusion effect. Meanwhile, the ultraviolet light shielding material of the core 12a can block ultraviolet light. Therefore, the protective layer 10c not only blocks ultraviolet light but also further improves the light diffusion performance.

[0092] Furthermore, since one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the diffusion layer 12, and at least one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as an ultraviolet light blocking layer, in some embodiments, one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the diffusion layer 12, another is reused as an ultraviolet light blocking layer, and the remaining one retains its original functional requirements. However, this is not limited to this; for example, one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b may be reused as the diffusion layer 12, and the other two may be reused as ultraviolet light blocking layers; or one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b may be reused as the diffusion layer 12, and all three may be reused as ultraviolet light blocking layers.

[0093] Optionally, in some embodiments of this application, the ultraviolet light blocking layer has a set light transmittance Tr of 380 nanometers, where Tr ≤ 10%, to reduce the risk of degradation of the display module 100.

[0094] Optionally, in some embodiments of this application, the display panel 11 includes an electroluminescent substrate 111 and a color filter layer 112, the color filter layer 112 being disposed on the light-emitting side of the electroluminescent substrate 111, and a first optical adhesive layer 10a being disposed between the protective layer 10c and the color filter layer 112.

[0095] The electroluminescent substrate 111 includes a red sub-pixel 11r, a green sub-pixel 11g, and a blue sub-pixel 11b, wherein the area of ​​the blue sub-pixel 11b is larger than the area of ​​the red sub-pixel 11r and the area of ​​the green sub-pixel 11g.

[0096] At least one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as a blue light absorbing layer, wherein the blue light absorbing layer is doped with a blue light absorbing material.

[0097] It is understandable that, given that the use of a color filter layer 112 to replace the polarizer increases light transmittance, and the larger area of ​​the blue sub-pixel 11b results in higher reflectivity of the blue sub-pixel 11b to external light, the display module may exhibit a bluish hue in its reflected light. Therefore, the display module 100 in this embodiment uses the aforementioned blue light absorption layer to absorb blue light, thereby reducing the risk of a bluish hue in the display module 100.

[0098] Optionally, the blue light absorbing material includes one or a combination of two of the following: metal complex dyes, yellow phosphors, and inorganic materials. The inorganic materials include at least one of aluminates and stannates.

[0099] Optionally, in some embodiments of this application, the blue light absorption layer has a transmittance yellow value YI, YI≥2, to reduce the risk of the display module 100 being biased towards blue.

[0100] It is understood that, based on the fact that one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the diffusion layer 12, and at least one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the blue light absorption layer, therefore, in some embodiments, one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b may combine light diffusion and blue light absorption functions. For example, the protective layer 10c may be reused as both the diffusion layer 12 and the blue light absorption layer. However, this is not limited to this; for example, either the first optical adhesive layer 10a or the second optical adhesive layer 10b may be reused as both the diffusion layer 12 and the blue light absorption layer.

[0101] Taking the protective layer 10c as both a diffusion layer 12 and a blue light absorption layer as an example, it can also be said that the diffusion layer 12 integrates both protective and blue light absorption functions. Based on Figure 4, the feature body 122 includes a core 12a and a shell 12b enclosing the core 12a. The material of the core 12a includes the aforementioned blue light absorbing material.

[0102] In some embodiments, the blue light absorbing material is selected from inorganic materials, such as aluminates, stannates, etc. Based on this, the feature 122 can be a nanoparticle formed from the blue light absorbing material to simultaneously achieve light diffusion and blue light absorption.

[0103] Furthermore, since one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the diffusion layer 12, and at least one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the blue light absorption layer, in some embodiments, one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the diffusion layer 12, another is reused as the blue light absorption layer, and the remaining one retains its original functional requirements. However, this is not limited to this; for example, one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b may be reused as the diffusion layer 12, and the other two may be reused as the blue light absorption layer; or one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b may be reused as the diffusion layer 12, and all three may be reused as the blue light absorption layer.

[0104] In some embodiments, one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the diffusion layer 12; at least one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as an ultraviolet light blocking layer; and at least one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as a blue light absorbing layer. Therefore, in some embodiments, one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b may combine light diffusion, ultraviolet light blocking, and blue light absorption functions. For example, the protective layer 10c may be reused as the diffusion layer 12, the ultraviolet light blocking layer, and the blue light absorbing layer simultaneously. However, this is not the only possibility; for example, either the first optical adhesive layer 10a or the second optical adhesive layer 10b may be reused as the diffusion layer 12, the ultraviolet light blocking layer, and the blue light absorbing layer simultaneously.

[0105] Taking the protective layer 10c as a multiplexed diffuser layer 12, the ultraviolet light blocking layer, and the blue light absorbing layer as an example, it can also be said that the diffuser layer 12 integrates protective functions, ultraviolet light blocking functions, and blue light absorption functions. Based on Figure 4, the feature body 122 includes a core 12a and a shell 12b enclosing the core 12a. The shell 12b includes the inorganic blue light absorbing material, and the core 12a is made of the ultraviolet light shielding material. For example, the shell 12b may be made of at least one of aluminate and stannate.

[0106] It should be noted that, in some embodiments, the feature body 122 has a double-layer light-transmitting structure formed by the shell 12b and the core 12a, which gives the feature body 122 a dual scattering effect, improving the diffusion effect. The blue light absorbing material of the shell 12b can absorb blue light, while the ultraviolet light shielding material of the core 12a can block ultraviolet light. Therefore, the protective layer 10c not only blocks ultraviolet light and absorbs blue light, but also further improves the light diffusion performance.

[0107] Secondly, in some embodiments, based on the fact that the refractive index of the core 12a is greater than that of the shell 12b, the refractive index of the shell 12b is greater than that of the light-transmitting layer 121, and the feature 122 has a double-layer light-transmitting structure formed by the shell 12b and the core 12a, the feature 122 has a double total internal reflection effect, which improves the diffusion effect. The blue light absorbing material of the shell 12b can absorb blue light, and the ultraviolet light shielding material of the core 12a can block ultraviolet light. Therefore, the protective layer 10c not only blocks ultraviolet light but also further improves the light diffusion performance.

[0108] Optionally, in some embodiments, one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as the diffusion layer 12; at least one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as an ultraviolet light blocking layer; and at least one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as a blue light absorbing layer. Alternatively, one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b may be reused as the diffusion layer 12, while the other may be reused as an ultraviolet light blocking layer. One of the layers is reused as a blue light absorbing layer; or, one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as a diffusion layer 12, the other is reused as an ultraviolet light blocking layer and a blue light absorbing layer, and the remaining one is reused as an ultraviolet light blocking layer or a blue light absorbing layer; or one of the first optical adhesive layer 10a, the protective layer 10c, and the second optical adhesive layer 10b is reused as either an ultraviolet light blocking layer or a blue light absorbing layer, as well as a diffusion layer 12, and the remaining two are both reused as an ultraviolet light blocking layer and a blue light absorbing layer, and so on.

[0109] Figure 5 shows another structural schematic diagram of the display module 100 according to an embodiment of this application. In Figure 6, the parts that differ from the above embodiments will be described to avoid redundancy.

[0110] Referring to Figure 5, in some embodiments of this application, the diffusion layer 12 is an optical adhesive layer, and the diffusion layer 12 connects the display panel 11 and the cover plate 13.

[0111] The diffusion layer 12 has the function of adhesive layer and at least one of ultraviolet light blocking layer and blue light absorbing layer.

[0112] It should be noted that the structure of the diffusion layer 12 is similar to or the same as the structure of the diffusion layer 12 of the display module 100 in the above embodiments. For details, please refer to the relevant descriptions in Figures 2 and 4, which will not be repeated here.

[0113] Please refer to Figure 6, which shows a schematic diagram of the structure of a display device 1000 according to an embodiment of this application. This application also provides a display device 1000, including a display module 100 as described in any of the above embodiments.

[0114] It should be noted that the structure of the display module 100 of the display device 1000 in this application embodiment is similar to or the same as the structure of the display module 100 in any of the above embodiments. For details, please refer to the relevant descriptions in Figures 1 to 5, which will not be repeated here.

[0115] The display device 1000 of this application embodiment includes a display panel 11, a diffusion layer 12, and a cover plate 13. The diffusion layer 12 is disposed on the light-emitting side of the display panel 11 and is configured to diffuse the emitted light from the display panel 11. The cover plate 13 is disposed on the side of the diffusion layer 12 away from the display panel 11, and the surface of the cover plate 13 away from the display panel 11 is a textured surface.

[0116] It should be noted that when the emitted light from the display panel 11 passes through the diffusion layer 12, the emitted light is dispersed by the diffusion layer 12. When the dispersed light radiates onto the textured surface of the cover plate, it is relatively uniform, thereby reducing the degree of uneven scattering and achieving the effect of improving the flash point.

[0117] Optionally, the display device 1000 may be a smartphone, but the display device 1000 according to this disclosure is not limited thereto. The display device 1000 can be applied to and used in a variety of products, including, for example, televisions, laptop computers, monitors, billboards, Internet of Things (IoT) devices, and portable electronic devices including mobile phones, smartphones, tablet computers, mobile communication terminals, electronic notebooks, e-books, portable multimedia players (PMPs), navigation devices, and ultra-mobile personal computers (UMPCs).

[0118] Furthermore, the display device 1000 according to some embodiments can be applied to and used within wearable devices, including smartwatches, watch phones, glasses-type displays, and head-mounted displays (HMDs). Additionally, according to some embodiments, the display device 1000 can be applied to instrument panels for automobiles, displays in central dashboards or central information displays (CIDs) arranged on instrument panels, interior mirror displays replacing side mirrors, and displays for entertainment systems arranged on the back of the front seats for rear-seat passengers in automobiles.

[0119] The above provides a detailed description of a display module and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display module, comprising: Display panel; A diffusion layer is disposed on the light-emitting side of the display panel, and the diffusion layer is configured to diffuse the emitted light of the display panel; A cover plate is disposed on the side of the diffusion layer away from the display panel, and the surface of the cover plate away from the display panel is a textured surface.

2. The display module according to claim 1, wherein, The diffusion layer includes a light-transmitting layer and a plurality of features disposed within the light-transmitting layer; Wherein, the feature body is a scattering particle, and / or, the refractive index of the feature body is greater than the refractive index of the light-transmitting layer.

3. The display module according to claim 2, wherein, The diffuser layer has a transmittance of 85% or more across all angles.

4. The display module according to claim 3, wherein, The light intensity of a non-diffusing point light source propagating in a straight line through the diffusion layer at the maximum diffusion angle is I (max°), and the light intensity of a non-diffusing point light source propagating in a straight line through the diffusion layer at a 0-degree angle is I (0°). Where I(max°) / I(0°)≥0.

5.

5. The display module according to claim 4, wherein, The maximum diffusion angle of a non-diffusing point light source propagating in a straight line through the diffusion layer is between 4 and 16 degrees.

6. The display module according to any one of claims 1-5, wherein, The diffusion layer is an optical adhesive layer, which connects the display panel and the cover plate.

7. The display module according to any one of claims 2-5, wherein, The display module further includes at least three light-transmitting functional layers located between the cover plate and the display panel, and one of the at least three light-transmitting functional layers is reused as the diffusion layer.

8. The display module according to claim 7, wherein, The diffusion layer is reused as at least one of an ultraviolet light blocking layer and a blue light absorbing layer.

9. The display module according to claim 8, wherein, The diffusion layer is reused as an ultraviolet light blocking layer, and the feature body includes a core and a shell enclosing the core, wherein the core is made of an ultraviolet-shielding material.

10. The display module according to claim 9, wherein, The diffusion layer is also reused as a blue light absorption layer. The feature body includes a core and a shell enclosing the core. The shell includes a blue light absorbing material, and the core is made of an ultraviolet shielding material.

11. The display module according to claim 9, wherein, The refractive index of the core is greater than that of the shell, and the refractive index of the shell is greater than that of the light-transmitting layer.

12. The display module according to claim 8, wherein, The diffusion layer is reused as a blue light absorption layer, and the feature body includes a core and a shell enclosing the core, wherein the core is made of a blue light absorbing material.

13. The display module according to claim 7, wherein, The at least three light-transmitting functional layers include a first optical adhesive layer, a protective layer, and a second optical adhesive layer. The first optical adhesive layer is disposed between the protective layer and the display panel, and the second optical adhesive layer is disposed between the protective layer and the cover plate. One of the first optical adhesive layer, the protective layer, and the second optical adhesive layer is reused as the diffusion layer.

14. The display module according to claim 13, wherein, At least one of the first optical adhesive layer, the protective layer, and the second optical adhesive layer is reused as an ultraviolet light blocking layer, wherein an ultraviolet light shielding material is disposed within the ultraviolet light blocking layer.

15. The display module according to claim 14, wherein, The ultraviolet light blocking layer has a set light transmittance Tr of 380 nanometers, where Tr≤10%.

16. The display module according to claim 13, wherein, The display panel includes an electroluminescent substrate and a color filter layer. The color filter layer is disposed on the light-emitting side of the electroluminescent substrate, and the first optical adhesive layer is disposed between the protective layer and the color filter layer.

17. The display module according to claim 16, wherein, The electroluminescent substrate includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, wherein the area of ​​the blue sub-pixel is larger than the area of ​​the red sub-pixel and the area of ​​the green sub-pixel; At least one of the first optical adhesive layer, the protective layer, and the second optical adhesive layer is reused as a blue light absorbing layer, wherein the blue light absorbing layer is doped with a blue light absorbing material.

18. The display module according to claim 17, wherein, The blue light absorption layer has a transmittance yellow value YI, where YI ≥ 2.

19. The display module according to any one of claims 1-5, wherein, The textured surface of the cover plate is a rough surface, and the root mean square roughness of the textured surface is between 0.1 micrometers and 0.5 micrometers.

20. A display device comprising a display module as described in any one of claims 1-19.

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