Display module and display device

Abstract

An embodiment of the present invention discloses a display module and a display device; the display module includes a display panel and an optical film located on the light-emitting side of the display panel, the optical film at least includes a first pattern layer and a second pattern layer located on the surface of the first pattern layer away from the display panel, the first pattern layer includes a plurality of first protrusions and a plurality of first depressions on the side away from the display panel, the second pattern layer includes a plurality of second protrusions and a plurality of second depressions on the side close to the first pattern layer, the refractive index of the first pattern layer is greater than that of the second pattern layer, one first protrusion corresponds to one second depression, and one first depression corresponds to one second protrusion; by providing a high and low refractive index film layer on the light-emitting side of the display panel, the present invention increases the complexity of the optical structure, increases the scattering of light, and improves the side-view display effect of the display module through the cooperation of the protrusions and depressions when the display light is emitted from the high refractive index film layer to the low refractive index film layer.

Description

Technical Field

[0001] The present invention relates to the field of displays, and particularly to a display module and a display device. Background Art

[0002] In recent years, consumers have paid increasing attention to the display effect of display modules. Due to the narrow viewing angle of the display light, which is mainly concentrated in the front view direction, as the viewing angle increases, the viewing effect on the side view angle of the display module deteriorates, reducing the display effect of the display module.

[0003] Therefore, there is an urgent need for a display module and a display device to solve the above technical problems. Summary of the Invention

[0004] The present invention provides a display module and a display device, which can solve the technical problem of the poor viewing effect of the current display side view angle.

[0005] The present invention provides a display module, including a display panel and an optical film located on the light-emitting side of the display panel; wherein, the optical film at least includes:

[0006] A first pattern layer, including a plurality of first protrusions and a plurality of first depressions on the side away from the display panel; and

[0007] A second pattern layer, located on the surface of the first pattern layer on the side away from the display panel, the second pattern layer including a plurality of second protrusions and a plurality of second depressions on the side close to the first pattern layer;

[0008] Wherein, the refractive index of the first pattern layer is greater than that of the second pattern layer, one of the first protrusions corresponds to one of the second depressions, and one of the first depressions corresponds to one of the second protrusions.

[0009] Preferably, the optical film further includes a plurality of scattering particles located in any film layer of the optical film.

[0010] Preferably, at least one of the scattering particles is a solid particle, and the refractive index of the scattering particle is different from that of the corresponding film layer where it is located.

[0011] Preferably, at least one of the scattering particles includes a particle main body and a cavity located in the particle main body, and the refractive index of the medium in the cavity is different from that of the particle main body.

[0012] Preferably, the cavity is filled with a first gas, and the refractive index of the first gas is different from that of the particle main body.

[0013] Preferably, in the light-emitting direction of the display module, the number density of the scattering particles including the first gas gradually increases.

[0014] Preferably, the cavity is filled with a first liquid, and the refractive index of the first liquid is different from that of the particle main body.

[0015] Preferably, in the light-emitting direction of the display module, the number density of the scattering particles including the first liquid gradually decreases.

[0016] Preferably, at least one of the scattering particles includes a particle main body and at least one through hole. The through hole penetrates the particle main body, and the corresponding film layer is filled in the through hole. The refractive index of the particle main body is different from that of the corresponding film layer.

[0017] Preferably, the refractive index of the film layer closest to the display panel side in the optical film is greater than the refractive index of the film layer farthest from the display panel side in the optical film; the difference between the refractive index of the film layer closest to the display panel side in the optical film and the refractive index of the film layer farthest from the display panel side in the optical film is greater than or equal to 0.2.

[0018] Preferably, the optical film further includes at least one transparent layer located on the side of the second pattern layer away from the first pattern layer; wherein, in the optical film, in the light-emitting direction of the display module, the refractive indices of adjacent two film layers gradually decrease.

[0019] Preferably, the optical film further includes a third transparent layer located on the side of the second pattern layer away from the first pattern layer and a fourth transparent layer located on the side of the third transparent layer away from the first pattern layer; the second pattern layer further includes a plurality of third protrusions and a plurality of third depressions on the side close to the third transparent layer; the third transparent layer includes a plurality of fourth protrusions and a plurality of fourth depressions on the side close to the second pattern layer and a plurality of fifth protrusions and a plurality of fifth depressions on the side close to the fourth transparent layer; the fourth transparent layer includes a plurality of sixth protrusions and a plurality of sixth depressions on the side close to the third transparent layer; wherein, the refractive index of the second pattern layer is greater than that of the third transparent layer, the refractive index of the third transparent layer is greater than that of the fourth transparent layer, one of the third protrusions corresponds to one of the fourth depressions, one of the third depressions corresponds to one of the fourth protrusions, one of the fifth protrusions corresponds to one of the sixth depressions, and one of the fifth depressions corresponds to one of the sixth protrusions.

[0020] The present invention also provides a display device, including a display panel and a device main body as described in any one of the above, and the device main body and the display panel are combined into one body.

[0021] Advantages of the present invention: By providing a transparent layer with high and low refractive indices on the light-emitting side of the display panel, the display light is emitted from the high-refractive-index film layer to the low-refractive-index film layer and the cooperation of protrusions and depressions, which increases the complexity of the optical structure, increases the scattering of light, improves the side-viewing angle characteristics of the display light, and improves the display effect of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 FIG. 9 is a schematic structural diagram of the first structure of the display module provided by the embodiment of the present invention;

[0024] Figure 2 FIG. 13 is a schematic structural diagram of the second structure of the display module provided by the embodiment of the present invention;

[0025] Figure 3 FIG. 17 is a schematic enlarged view of the first structure of the scattering particles of the display module provided by the embodiment of the present invention;

[0026] Figure 4 FIG. 21 is a schematic enlarged view of the second structure of the scattering particles of the display module provided by the embodiment of the present invention;

[0027] Figure 5 FIG. 25 is a schematic enlarged view of the third structure of the scattering particles of the display module provided by the embodiment of the present invention;

[0028] Figure 6 FIG. 29 is a schematic structural diagram of the third structure of the display module provided by the embodiment of the present invention;

[0029] Figure 7 FIG. 33 is a schematic structural diagram of the fourth structure of the display module provided by the embodiment of the present invention;

[0030] Figure 8 FIG. 37 is a schematic structural diagram of the display device provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise stated, the orientation words 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; and "inner" and "outer" refer to the outline of the device.

[0032] In recent years, consumers have paid increasing attention to the display effect of the display module. As the viewing angle increases, the viewing effect on the side view angle of the display module becomes worse, reducing the display effect of the display module.

[0033] Please refer to Figures 1 to 7 , an embodiment of the present invention provides a display module 100, including a display panel 200 and an optical film 300 located on the light-emitting side of the display panel 200; wherein, the optical film 300 at least includes:

[0034] A first pattern layer 310, including a plurality of first protrusions 311 and a plurality of first depressions 312 on the side away from the display panel 200; and

[0035] A second pattern layer 320, located on the surface of the first pattern layer 310 on the side away from the display panel 200, the second pattern layer 320 including a plurality of second protrusions 321 and a plurality of second depressions 322 on the side close to the first pattern layer 310;

[0036] Wherein, the refractive index of the first pattern layer 310 is greater than the refractive index of the second pattern layer 320, one of the first protrusions 311 corresponds to one of the second depressions 322, and one of the first depressions 312 corresponds to one of the second protrusions 321.

[0037] In the present invention, by providing a transparent layer with high and low refractive indexes on the light-emitting side of the display panel, and the cooperation of the protrusions and depressions when the display light is emitted from the high-refractive-index film layer to the low-refractive-index film layer, the complexity of the optical structure is increased, the scattering of light is increased, the side-view angle characteristics of the display light are improved, and the display effect of the display module is improved.

[0038] Now, the technical solutions of the present invention will be described in combination with specific embodiments.

[0039] In this embodiment, please refer to Figure 1, the display module 100 includes a display panel 200 and an optical film 300 located on the light-emitting side of the display panel 200.

[0040] In some embodiments, refer to Figure 1 , the optical film 300 at least includes a first pattern layer 310 and a second pattern layer 320 located on the surface of the first pattern layer 310 away from the display panel 200. The first pattern layer 310 includes a plurality of first protrusions 311 and a plurality of first depressions 312 on the side away from the display panel 200; the second pattern layer 320 includes a plurality of second protrusions 321 and a plurality of second depressions 322 on the side close to the first pattern layer 310; wherein, the refractive index of the first pattern layer 310 is greater than that of the second pattern layer 320, one of the first protrusions 311 corresponds to one of the second depressions 322, and one of the first depressions 312 corresponds to one of the second protrusions 321.

[0041] The first pattern layer 310 is closer to the display light side, and the second pattern layer 320 is closer to the human eye side. The display light emitted by the display panel 200 passes through the first pattern layer 310 and the second pattern layer 320. Since the refractive index of the second pattern layer 320 is less than that of the first pattern layer 310, more light of the display light will be emitted in the side viewing angle direction. Due to the cooperation between the first protrusions 311 and the second depressions 322, and between the first depressions 312 and the second protrusions 321, light will be scattered at the interfaces between the first protrusions 311 and the second depressions 322, and between the first depressions 312 and the second protrusions 321, increasing the complexity of the optical structure of the optical film 300. Combining with the refractive index difference, the scattering of light is increased to improve the side viewing angle characteristics of the display light and improve the display effect of the display module 100.

[0042] In some embodiments, refer to Figure 2 , the optical film 300 further includes a plurality of scattering particles 400 located in any film layer of the optical film 300.

[0043] By filling a plurality of the scattering particles 400 in any film layer of the optical film 300, the complexity of the optical structure of the optical film 300 is further increased to increase the scattering of light, improve the side viewing angle characteristics of the display light, and improve the display effect of the display module 100.

[0044] In some embodiments, refer to Figure 3 , at least one of the scattering particles 400 is a solid particle, and the refractive index of the scattering particle 400 is different from that of the corresponding film layer where it is located.

[0045] If the scattering particle 400 is a solid particle, the refractive index of the scattering particle 400 is different from that of the corresponding film layer where it is located, increasing the complexity of the optical structure of the optical film 300. By utilizing the refractive index difference, the scattering effect of the display light when it hits the scattering particle 400 is enhanced, and the ambient reflected light is diffusely reflected in all directions, which can blur the ambient light and lamp shadows, reduce the influence of the external ambient light, increase the scattering of light, improve the side viewing angle characteristics of the display light, and enhance the display effect of the display module 100.

[0046] In some embodiments, refer to Figure 4 , at least one of the scattering particles 400 includes a particle main body 410 and a cavity 420 located inside the particle main body 410, and the refractive index of the medium inside the cavity 420 is different from that of the particle main body 410.

[0047] The particle main body 410 wraps the cavity 420, which is a hollow structure when there is no filler. By filling a medium with a refractive index different from that of the particle main body 410 inside the particle main body 410, the complexity of the optical structure of the optical film 300 is increased. By utilizing the refractive index difference, the scattering effect of the display light when it hits the scattering particle 400 is enhanced, and the ambient reflected light is diffusely reflected in all directions, which can blur the ambient light and lamp shadows, reduce the influence of the external ambient light, increase the scattering of light, improve the side viewing angle characteristics of the display light, and enhance the display effect of the display module 100.

[0048] In some embodiments, the cavity 420 is filled with a first gas, and the refractive index of the first gas is different from that of the particle main body 410.

[0049] The particle main body 410 wraps the cavity 420, which is a hollow structure when there is no filler. By filling the cavity 420 with a first gas, and the refractive index of the first gas is different from that of the particle main body 410, the complexity of the optical structure of the optical film 300 is increased. By utilizing the refractive index difference, the scattering effect of the display light when it hits the scattering particle 400 is enhanced, and the ambient reflected light is diffusely reflected in all directions, which can blur the ambient light and lamp shadows, reduce the influence of the external ambient light, increase the scattering of light, improve the side viewing angle characteristics of the display light, and enhance the display effect of the display module 100.

[0050] In some embodiments, in the light emitting direction of the display module 100, the number density of the scattering particles 400 including the first gas gradually increases.

[0051] On the side close to the human eye for viewing, the number density of the scattering particles 400 including the first gas gradually increases, which can reduce the refractive index difference from the outside air, so that the display light can be more smoothly projected onto the human eye and the refractive loss of the display light can be reduced. By increasing the complexity of the optical structure of the optical film 300 and using the refractive index difference, the scattering effect of the display light when it hits the scattering particles 400 is enhanced, and the ambient reflected light is diffusely reflected in all directions, which can blur the ambient light and lamp shadows, reduce the influence of the external ambient light, increase the scattering of light, improve the side viewing angle characteristics of the display light, and improve the display effect of the display module 100.

[0052] In some embodiments, the first gas may be an inert gas, such as helium, nitrogen, etc. This is only for example and not for specific limitation. The most abundant component in air is nitrogen, and at the same time, the refractive indices of the gases are similar. Under the same conditions, the refractive index of the first gas is similar to that of the outside air of the display module 100 and can be ignored.

[0053] In some embodiments, the cavity 420 is filled with a first liquid, and the refractive index of the first liquid is different from that of the particle main body 410.

[0054] The particle main body 410 wraps the cavity 420, and the cavity 420 is filled with a first liquid. The refractive index of the first liquid or the first gas is different from that of the particle main body 410. By increasing the complexity of the optical structure of the optical film 300 and using the refractive index difference, the scattering effect of the display light when it hits the scattering particles 400 is enhanced, and the ambient reflected light is diffusely reflected in all directions, which can blur the ambient light and lamp shadows, reduce the influence of the external ambient light, increase the scattering of light, improve the side viewing angle characteristics of the display light, and improve the display effect of the display module 100.

[0055] In some embodiments, in the light-emitting direction of the display module 100, the number density of the scattering particles 400 including the first liquid gradually decreases.

[0056] In the light-emitting direction of the display module 100, the number density of the scattering particles 400 including the first liquid gradually decreases, increasing the refractive index between the scattering particles 400 including the first liquid and the scattering particles 400 including the air. By increasing the complexity of the optical structure of the optical film 300 and using the refractive index difference, the scattering effect of the display light when it hits the scattering particles 400 is enhanced, and the ambient reflected light is diffusely reflected in all directions, which can blur the ambient light and lamp shadows, reduce the influence of the external ambient light, increase the scattering of light, improve the side viewing angle characteristics of the display light, and improve the display effect of the display module 100.

[0057] In some embodiments, refer to Figure 5 , at least one of the scattering particles 400 includes a particle main body 410 and at least one through hole 430. The through hole 430 penetrates through the particle main body 410, and the corresponding film layer is filled in the through hole 430. The refractive index of the particle main body 410 is different from that of the corresponding film layer where it is located.

[0058] It only needs to penetrate the particle main body 410 by using the through hole 430 and form it together with the optical film 300. The manufacturing process is simple. By using the fact that the refractive index of the through hole 430 and the particle main body 410 is different from that of the corresponding film layer where they are located, the complexity of the optical structure of the optical film 300 is increased. By using the refractive index difference, the scattering effect of the display light when it hits the scattering particle 400 is enhanced, and the ambient reflected light is diffusely reflected in all directions, so that the ambient light and lamp shadows can be blurred, the influence of the external ambient light is reduced, the scattering of light is increased, the side view angle characteristic of the display light is improved, and the display effect of the display module 100 is improved.

[0059] In some embodiments, the refractive index of the film layer closest to the display panel 200 in the optical film 300 is greater than the refractive index of the film layer farthest from the display panel 200 in the optical film 300; the difference between the refractive index of the film layer closest to the display panel 200 in the optical film 300 and the refractive index of the film layer farthest from the display panel 200 in the optical film 300 is greater than or equal to 0.2.

[0060] The large refractive index difference between the film layer closest to the display panel 200 and the film layer farthest from the display panel 200 in the optical film 300 can make the display light have a scattering effect. The difference between the refractive index of the film layer closest to the display panel 200 and the refractive index of the film layer farthest from the display panel 200 in the optical film 300 being greater than or equal to 0.2 can ensure the display effect of the side view angle. If a multi-layer film structure is adopted, the refractive index difference between adjacent two film layers in the optical film 300 is less than 0.2. The smaller the refractive index difference between layers, the smaller the reflectivity of the display light, the smaller the light loss, and the higher the light transmittance.

[0061] For example, the optical film 300 only includes the first pattern layer 310 and the second pattern layer 320, and the difference between the refractive index of the first pattern layer 310 and the refractive index of the second pattern layer 320 is greater than or equal to 0.2. For example, the optical film 300 includes the first pattern layer 310, the second pattern layer 320, and a third transparent layer 330 located on the side of the second pattern layer 320 away from the first pattern layer 310. The refractive index of the first pattern layer 310 may be 0.3 greater than the refractive index of the third transparent layer 330. The refractive index of the first pattern layer 310 may be 0.15 greater than the refractive index of the second pattern layer 320. The refractive index of the second pattern layer 320 may be 0.15 greater than the refractive index of the third transparent layer 330, so as to reduce the display light loss and ensure the display effect of the side viewing angle. Here, only examples are given and no specific limitations are made.

[0062] In some embodiments, referring to Figure 6 , the optical film 300 further includes at least one transparent layer located on the side of the second pattern layer 320 away from the first pattern layer 310; wherein, in the optical film 300, in the light emitting direction of the display module 100, the refractive indices of adjacent two film layers gradually decrease.

[0063] In Figure 6 , taking the third transparent layer 330 as an example to represent at least one transparent layer located on the side of the second pattern layer 320 away from the first pattern layer 310, the refractive index differences of multiple film layers are adopted to enhance the scattering effect when the display light is incident on the scattering particles 400, diffuse the ambient reflected light in all directions, can blur the ambient light and lamp shadows, reduce the influence of the external ambient light, increase the scattering of light, improve the side viewing angle characteristics of the display light, and improve the display effect of the display module 100.

[0064] In some embodiments, referring to Figure 7, the optical film 300 further includes a third transparent layer 330 located on a side of the second pattern layer 320 away from the first pattern layer 310, and a fourth transparent layer 340 located on a side of the third transparent layer 330 away from the first pattern layer 310; the second pattern layer 320 further includes a plurality of third protrusions 331 and a plurality of third depressions 332 on a side close to the third transparent layer 330; the third transparent layer 330 includes a plurality of fourth protrusions 341 and a plurality of fourth depressions 342 on a side close to the second pattern layer 320, and a plurality of fifth protrusions 351 and a plurality of fifth depressions 352 on a side close to the fourth transparent layer 340; the fourth transparent layer 340 includes a plurality of sixth protrusions 361 and a plurality of sixth depressions 362 on a side close to the third transparent layer 330; wherein, the refractive index of the second pattern layer 320 is greater than the refractive index of the third transparent layer 330, the refractive index of the third transparent layer 330 is greater than the refractive index of the fourth transparent layer 340, one of the third protrusions 331 corresponds to one of the fourth depressions 342, one of the third depressions 332 corresponds to one of the fourth protrusions 341, one of the fifth protrusions 351 corresponds to one of the sixth depressions 362, and one of the fifth depressions 352 corresponds to one of the sixth protrusions 361.

[0065] By using a multi-film layer in combination with a plurality of protrusions and a plurality of depressions, and forming an interface by using the cooperation of three groups of protrusions and depressions, it is possible to further increase the complexity of the optical structure of the optical film 300 while not losing too much transmittance of the display light. By utilizing the refractive index difference, the scattering effect of the display light when hitting the scattering particles 400 is enhanced, and the ambient reflected light is diffusely reflected in all directions, so that the ambient light and lamp shadows can be blurred, the influence of the external ambient light is reduced, the scattering of light is increased, the side viewing angle characteristics of the display light are improved, and the display effect of the display module 100 is improved.

[0066] In some embodiments, please refer to Figure 7 , in a direction from the edge of the display module 100 to the center of the display module 100, the number density of the first depressions 312 and the first protrusions 311 increases, and the number density of the second depressions 322 and the second protrusions 321 increases. To emphasize the improvement of the side viewing angle at the center of the display module 100 and improve the side viewing display effect of the display panel 200.

[0067] In some embodiments, in the light-emitting direction of the display module 100, the refractive index of the first liquid in the cavity 420 gradually decreases.

[0068] On the side close to the human eye for viewing, the refractive index of the first liquid in the cavity 420 gradually decreases, which can reduce the refractive index difference from the external air, so that the display light can be more smoothly projected onto the human eye and the refractive loss of the display light can be reduced.

[0069] In some embodiments, the particle main body 410 may be an inorganic material, such as silica, titanium dioxide material, etc. Only examples are given here, and no specific limitations are made.

[0070] In some embodiments, the material of the optical film 300 may be a transparent material, such as acrylic polymer, urethane polymer, etc. Only examples are given here, and no specific limitations are made. By changing the material composition ratio, the refractive index of the corresponding film layer can be changed.

[0071] In some embodiments, the display panel 200 includes an array substrate. The array substrate includes an active layer on the substrate, a first insulating layer on the active layer, a gate layer on the first insulating layer, a second insulating layer on the gate layer, a source-drain layer on the second insulating layer, and a third insulating layer on the source-drain layer.

[0072] In some embodiments, the display panel 200 may further include a light-emitting device layer, and the display panel 200 is a self-emitting display panel 200.

[0073] In some embodiments, the light-emitting device layer includes an anode layer on the third insulating layer, a light-emitting material layer on the anode layer, and a cathode layer on the light-emitting material layer. The display panel 200 further includes a pixel defining layer disposed on the same layer as the light-emitting material layer, a polarizing layer on the light-emitting device layer, a flexible cover plate on the polarizing layer, and corresponding adhesive layers between the polarizing layer and the flexible cover plate, between the light-emitting device layer and the polarizing layer, and between the backplane and the substrate.

[0074] In some embodiments, the light-emitting device layer may include OLED (Organic Light-Emitting Diode) materials, or may include Micro LED or Mini LED. No specific limitations are made here.

[0075] In some embodiments, the display panel 200 may further include a liquid crystal layer and a color filter layer, and the display panel 200 is a liquid crystal display panel 200. The display module 100 further includes a backlight unit.

[0076] In the present invention, by providing a transparent layer with high and low refractive indices on the light-emitting side of the display panel, and the display light rays are emitted from the high-refractive-index film layer to the low-refractive-index film layer and the cooperation of the protrusions and depressions, the complexity of the optical structure is increased, the scattering of the light rays is increased, the side-view angle characteristics of the display light rays are improved, and the display effect of the display module is improved.

[0077] Please refer to Figure 8 , an embodiment of the present invention further provides a display device 10, including a display module 100 as described above and a device body 20, and the device body 20 and the display module 100 are combined into one body.

[0078] For the specific structure of the display module 100, please refer to the embodiments and drawings of any of the above display modules 100, which will not be elaborated here.

[0079] In this embodiment, the device body 20 may include a middle frame, frame glue, etc. The display device 10 may be a mobile display terminal such as a mobile phone or a tablet, which is not limited here.

[0080] An embodiment of the present invention discloses a display module; the display module includes a display panel and an optical film located on the light-emitting side of the display panel. The optical film at least includes a first pattern layer and a second pattern layer located on the surface of the first pattern layer away from the display panel. The first pattern layer includes a plurality of first protrusions and a plurality of first depressions on the side away from the display panel. The second pattern layer includes a plurality of second protrusions and a plurality of second depressions on the side close to the first pattern layer. The refractive index of the first pattern layer is greater than that of the second pattern layer. One first protrusion corresponds to one second depression, and one first depression corresponds to one second protrusion; in the present invention, by providing a film layer with high and low refractive indices on the light-emitting side of the display panel, and the display light rays are emitted from the high-refractive-index film layer to the low-refractive-index film layer and the cooperation of the protrusions and depressions, the complexity of the optical structure is increased, the scattering of the light rays is increased, and the side-view display effect of the display module is improved.

[0081] The above has introduced in detail a display module provided by an embodiment of the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A display module, characterized in that, It includes a display panel and an optical film located on the light-emitting side of the display panel; The optical film at least includes: A first pattern layer, including a plurality of first protrusions and a plurality of first depressions on the side away from the display panel; A second pattern layer, located on the surface of the first pattern layer on the side away from the display panel, the second pattern layer includes a plurality of second protrusions and a plurality of second depressions on the side close to the first pattern layer; the refractive index of the first pattern layer is greater than that of the second pattern layer, one of the first protrusions corresponds to one of the second depressions, and one of the first depressions corresponds to one of the second protrusions; and At least one transparent layer, located on the side of the second pattern layer away from the first pattern layer; Wherein, in the optical film, in the light-emitting direction of the display module, the refractive indices of adjacent two film layers gradually decrease, and a plurality of scattering particles are provided in each film layer of the optical film; in the direction from the edge of the display module to the center of the display module, the number density of the first depressions and the first protrusions increases, and the number density of the second depressions and the second protrusions increases.

2. The display module according to claim 1, wherein At least one of the scattering particles is a solid particle, and the refractive index of the scattering particle is different from that of the corresponding film layer where it is located.

3. The display module according to claim 1, wherein At least one of the scattering particles includes a particle main body and a cavity located inside the particle main body, and the refractive index of the medium in the cavity is different from that of the particle main body.

4. The display module according to claim 3, wherein The cavity is filled with a first gas, and the refractive index of the first gas is different from that of the particle main body.

5. The display module according to claim 4, wherein In the light-emitting direction of the display module, the number density of the scattering particles including the first gas gradually increases.

6. The display module according to claim 3, wherein The cavity is filled with a first liquid, and the refractive index of the first liquid is different from that of the particle main body.

7. The display module according to claim 6, wherein In the light-emitting direction of the display module, the number density of the scattering particles including the first liquid gradually decreases.

8. The display module according to claim 1, wherein At least one of the scattering particles includes a particle main body and at least one through hole, the through hole penetrates through the particle main body, and the through hole is filled with the corresponding film layer where it is located, and the refractive index of the particle main body is different from that of the corresponding film layer where it is located.

9. The display module according to claim 1, wherein The refractive index of the film layer closest to the display panel side in the optical film is greater than the refractive index of the film layer farthest from the display panel side in the optical film; The difference between the refractive index of the film layer closest to the display panel side in the optical film and the refractive index of the film layer farthest from the display panel side in the optical film is greater than or equal to 0.

2.

10. The display module according to claim 1, characterized in that, The optical film further includes a third transparent layer located on the side of the second pattern layer away from the first pattern layer, and a fourth transparent layer located on the side of the third transparent layer away from the first pattern layer; The second pattern layer further includes a plurality of third protrusions and a plurality of third depressions on the side close to the third transparent layer; The third transparent layer includes a plurality of fourth protrusions and a plurality of fourth depressions on the side close to the second pattern layer, and a plurality of fifth protrusions and a plurality of fifth depressions on the side close to the fourth transparent layer; The fourth transparent layer includes a plurality of sixth protrusions and a plurality of sixth depressions on the side close to the third transparent layer; Wherein, the refractive index of the second pattern layer is greater than that of the third transparent layer, the refractive index of the third transparent layer is greater than that of the fourth transparent layer, one of the third protrusions corresponds to one of the fourth depressions, one of the third depressions corresponds to one of the fourth protrusions, one of the fifth protrusions corresponds to one of the sixth depressions, and one of the fifth depressions corresponds to one of the sixth protrusions.

11. A display device, characterized in that, Comprising the display module according to any one of claims 1 to 10 and a device body, the device body and the display module are combined into one body.

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