Display module and display device

Abstract

The present application provides a display module and a display device. The display module comprises a display panel, a diffusion layer, and a cover plate, wherein a plurality of protrusions are provided on the surface of the cover plate away from the diffusion layer. The diffusion layer is additionally provided between the cover plate and the display panel, and the diffusion layer is configured to enable the size of a light spot formed on the cover plate by emergent light generated when collimated light is incident vertically to be greater than the spacing between adjacent protrusions.

Description

Display module and display device

[0001] This application claims priority to Chinese patent application No. 202510067152.1, filed on January 15, 2025, the entire contents of which are incorporated herein by reference. Technical Field

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

[0003] Glare is an undesirable optical phenomenon caused by specular reflection from the cover surface of a display module. It significantly reduces the visibility of the display module and has long-term effects on eye health. By texturing the surface of the cover, changing it from a specular to a rough surface, the rough surface can produce more uniform diffuse reflection of ambient light hitting the cover surface, thereby improving glare and enhancing the visibility of the display module. Invention Overview

[0004] Textured cover glass surfaces can cause other problems, a typical example being an optical defect known as flashing. Flashing is a phenomenon observed by the human eye as unevenly distributed colored dots on a display screen. Textured cover glass surfaces have irregular undulations, causing uneven scattering of light emitted by pixels, resulting in uneven distribution of light intensity and color, which users can see when viewing the display. Flashing is also affected by the pixel density of the display panel; the higher the pixel density, the more severe the flashing. When the pixel density exceeds 250, flashing severely impacts the viewing experience.

[0005] Therefore, it is necessary to provide a display module and display device to improve this deficiency.

[0006] In a first aspect, embodiments of this application provide a display module, comprising:

[0007] Display panel;

[0008] A diffusion layer is disposed on the light-emitting side of the display panel; and

[0009] 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 diffusion layer has a plurality of protrusions;

[0010] The diffusion layer is used to ensure that the size of the light spot formed on the cover plate by the outgoing light generated when the collimated light is incident perpendicularly is greater than the distance between adjacent protrusions.

[0011] Secondly, embodiments of this application also provide a display device, including the display panel as described above. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments disclosed. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 is a schematic diagram of the structure of the display module provided in an embodiment of this application;

[0014] Figure 2 is a schematic diagram of the diffusion layer in the display module provided in an embodiment of this application;

[0015] Figure 3 is a schematic diagram of the light diffusion effect of the diffusion layer in the display module provided in the embodiment of this application;

[0016] Figure 4 is a schematic diagram of the optical path of the diffusion layer in the display module provided in the embodiment of this application;

[0017] Figure 5 is a top view of the diffusion layer in the display module provided in an embodiment of this application;

[0018] Figure 6 is a schematic diagram of another diffusion layer in the display module provided in the embodiment of this application;

[0019] Figure 7 is a schematic diagram of another display module provided in an embodiment of this application;

[0020] Figure 8 is a schematic diagram of the structure of the display device provided in an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Display panel; 11. Light-emitting device layer; 111. Sub-pixel;

[0023] 2. Diffusion layer; 21. Substrate layer; 22. Light diffusion element; 221. Light guide column; 23. Diffusion particles;

[0024] 3. Cover plate; 31. Protrusion;

[0025] 4. Polarizing layer;

[0026] 5. First adhesive layer;

[0027] 6. Second adhesive layer;

[0028] 7. Third adhesive layer;

[0029] 8. Non-diffuse light source;

[0030] 100, Display module; 200, Housing; 1000, Display device. Embodiments of the present invention

[0031] The technical solutions of 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 them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "upper," "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] Reference numerals and / or reference letters may be repeated in different embodiments of this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various implementations and / or settings discussed.

[0034] Embodiments of this application provide a display module and display device that can improve the situation of flickering.

[0035] To achieve the above objectives, according to a first aspect of this application, a display module is provided, comprising:

[0036] Display panel;

[0037] A diffusion layer is disposed on the light-emitting side of the display panel; and

[0038] 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 diffusion layer has a plurality of protrusions;

[0039] The diffusion layer is used to ensure that the size of the light spot formed on the cover plate by the outgoing light generated when the collimated light is incident perpendicularly is greater than the distance between adjacent protrusions.

[0040] Optionally, the intensity distribution of the emitted light generated by the diffusion layer when collimated light is incident perpendicularly satisfies: cd1 / cd2 > 0.5, where cd1 is the minimum light intensity within the set emission angle range, and cd2 is the maximum light intensity within the set emission angle range.

[0041] Optionally, the intensity distribution of the outgoing light generated by the diffusion layer when collimated light is incident perpendicularly satisfies: cd1 / cd2 > 0.8.

[0042] Optionally, the set emission angle range includes -30° to 30°.

[0043] Optionally, the set emission angle range includes -10° to 10°.

[0044] Optionally, the diffusion layer includes a substrate layer and a light diffuser disposed in the substrate layer, wherein the refractive index of the light diffuser is greater than the refractive index of the substrate layer.

[0045] Optionally, the refractive index of the light diffuser and the refractive index of the substrate layer satisfy: n1-n2>0.05, where n1 is the refractive index of the light diffuser and n2 is the refractive index of the substrate layer.

[0046] Optionally, the light diffuser includes a plurality of light guide columns arranged in an array.

[0047] Optionally, the angle between the axial direction of the light guide post and the thickness direction of the substrate layer is greater than or equal to 0° and less than or equal to 45°.

[0048] Optionally, the diameter of the light guide post or the diameter of the circumcircle of the light guide post and the center distance between any two adjacent light guide posts satisfy: 1 / 3≤d1 / (d2-d1)≤3, where d1 is the diameter of the light guide post or the diameter of the circumcircle of the light guide post, and d2 is the center distance between any two adjacent light guide posts.

[0049] Optionally, the diameter of the light guide post or the diameter of the circumcircle of the light guide post and the center distance between any two adjacent light guide posts satisfy: 1 / 2≤d1 / (d2-d1)≤2.

[0050] Optionally, the display panel includes multiple sub-pixels, and the diameter of the light guide pillar or the diameter of the outer circle of the light guide pillar and the diameter of the smallest sub-pixel or the diameter of the outer circle of the sub-pixel satisfy: d1 / d3 < 0.5, where d1 is the diameter of the light guide pillar or the diameter of the outer circle of the light guide pillar, and d3 is the diameter of the smallest sub-pixel or the diameter of the outer circle of the sub-pixel.

[0051] Optionally, the diameter of the light guide post or the diameter of the circumcircle of the light guide post satisfies the condition that d1 / d3 < 0.3 with respect to the diameter of the smallest sub-pixel or the diameter of the circumcircle of the sub-pixel.

[0052] Optionally, the thickness of the substrate layer is the same as the height of the light guide post.

[0053] Optionally, the diffusion layer includes a substrate layer and diffusion particles disposed in the substrate layer, wherein the refractive index of the diffusion particles is greater than the refractive index of the substrate layer.

[0054] Optionally, the thickness of the diffusion layer is greater than or equal to 20 micrometers and less than or equal to 200 micrometers.

[0055] Optionally, the diffuser layer has a full-angle transmittance of greater than 85%.

[0056] Optionally, the display module further includes a polarizing layer disposed between the diffusion layer and the display panel.

[0057] According to a second aspect of this application, a display device is provided, including a display panel as described above.

[0058] In the display module of this application embodiment, a diffusion layer is added between the cover plate and the display panel, and multiple protrusions are formed on the surface of the cover plate away from the diffusion layer. The diffusion layer is used to make the size of the light spot formed on the cover plate by the outgoing light generated when collimated light is incident perpendicularly larger than the distance between adjacent protrusions. This allows more light to be irradiated onto the protrusions and dispersed by the protrusions, preventing the light from bypassing the protrusions. This improves the uniformity of light scattering on the surface of the cover plate. In this way, the uniformity of the intensity distribution of the light emitted from the display panel that is irradiated onto the cover plate through the diffusion layer can be improved, and the situation of local concentration of light intensity on the surface of the cover plate can be avoided. Thus, while suppressing glare, the flicker situation can be improved.

[0059] An embodiment of this application provides a display module, which includes 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 the cover plate is disposed on the side of the diffusion layer away from the display panel. The surface of the cover plate away from the diffusion layer has multiple protrusions. The diffusion layer is used to ensure that the size of the light spot formed on the cover plate by the outgoing light generated when collimated light is incident perpendicularly is greater than the distance between adjacent protrusions.

[0060] In the embodiments of this application, a diffusion layer is added between the anti-glare layer and the display panel, and multiple protrusions are formed on the surface of the cover plate away from the diffusion layer. The diffusion layer is used to make the size of the light spot formed on the cover plate by the outgoing light generated when the collimated light is incident perpendicularly larger than the distance between adjacent protrusions. This allows more light to be irradiated onto the protrusions and dispersed by the protrusions, preventing the light from bypassing the protrusions. This improves the uniformity of light scattering on the surface of the cover plate emitted by the display panel. In this way, the uniformity of the intensity distribution of the light emitted by the display panel that passes through the diffusion layer and irradiates the anti-glare layer can be improved, avoiding the occurrence of local concentration of light intensity on the surface of the glare layer. Thus, while suppressing glare, the flicker situation can be improved.

[0061] Please refer to Figure 1, which is a schematic diagram of the structure of a display module provided in an embodiment of this application. The display module 100 includes a display panel 1, a diffusion layer 2, and a cover plate 3. The diffusion layer 2 is disposed on the light-emitting side of the display panel 1, and the cover plate 3 is disposed on the side of the diffusion layer 2 away from the display panel 1. The surface of the cover plate 3 away from the diffusion layer 2 has multiple protrusions 31. The protrusions 31 can reflect or refract the light emitted through the diffusion layer 2, thereby changing the emission direction of the emitted light, so that the emitted light is diffused on the surface of the cover plate 3 away from the diffusion layer 2, thereby achieving an anti-glare effect. By using the diffusion layer 2 to make the size of the light spot formed on the cover plate 3 by the collimated light emitted by the light-emitting device in the display panel 1 perpendicularly incident on the cover plate 3 larger than the distance between adjacent protrusions 31, more light can be irradiated onto the protrusions 31 and dispersed by the protrusions 31, preventing the light from bypassing the protrusions 31. This improves the uniformity of light scattering on the cover plate surface, thereby improving the uniformity of the intensity distribution of the light emitted from the display panel that is irradiated onto the cover plate through the diffusion layer. This prevents the light intensity from being concentrated locally on the cover plate surface, thus suppressing glare and improving the flicker situation.

[0062] Please refer to Figure 1. The size of the light spot refers to the diameter of the light spot or the diameter of the circumcircle of the light spot. When the collimated light emitted by the display panel is perpendicularly incident on the diffusion layer 2, the shape of the light spot formed on the surface of the cover plate 3 near the diffusion layer 2 is circular, and the size of the light spot is the diameter of the light spot. When the collimated light emitted by the display panel is perpendicularly incident on the diffusion layer 2, the shape of the light spot formed on the surface of the cover plate 3 near the diffusion layer 2 is any shape other than circular, and the size of the light spot is the diameter of the circumcircle of the light spot.

[0063] In some embodiments, the protrusion 31 can diffusely reflect ambient light irradiating the surface of the cover plate 3, thereby suppressing glare and improving the visibility of the display panel. The diffusion layer 2 is disposed between the cover plate 3 and the display panel 1. When collimated light is incident perpendicularly, the outgoing light intensity distribution generated by the diffusion layer 2 satisfies: cd1 / cd2 > 0.5, where cd1 is the minimum light intensity within the set outgoing angle range, and cd2 is the maximum light intensity within the set outgoing angle range. The diffusion layer 2 can diffuse the light emitted by the display panel 1 more uniformly, improving the uniformity of the intensity distribution of the light emitted by the display panel that passes through the diffusion layer and irradiates the anti-glare layer. This improves the uniformity of the scattering of light emitted by the display panel on the surface of the anti-glare layer, avoiding the occurrence of local concentration of light intensity on the surface of the glare layer. Thus, while suppressing glare, it can also improve the flicker situation.

[0064] In some embodiments, the display panel 1 is an organic light-emitting diode display panel.

[0065] In some embodiments, the type of display panel 1 is not limited to the organic light-emitting diode display panel in the above embodiments. The display panel 1 may also be any one of mini light-emitting diode display panel, micro light-emitting diode display panel and liquid crystal display panel.

[0066] In some embodiments, the outgoing light intensity distribution generated by the diffusion layer 2 when collimated light is incident perpendicularly satisfies: cd1 / cd2 > 0.8, for example, cd1 / cd2 equals 0.81, 0.83, 0.85, 0.88, 0.9, etc. As long as it is greater than 0.8, the uniformity of the intensity distribution of the light emitted by the display panel and irradiated onto the anti-glare layer through the diffusion layer can be further improved. This further improves the uniformity of the scattering of the light emitted by the display panel on the surface of the anti-glare layer, and avoids the occurrence of local concentration of light intensity on the surface of the glare layer. Thus, while suppressing glare, the flicker point can be further improved.

[0067] In some embodiments, please refer to FIG2, which is a schematic diagram of the diffusion layer in the display module provided in the embodiments of this application. The display panel 1 includes a light-emitting device layer 11, which has a plurality of sub-pixels 111 arranged in an array, each sub-pixel being equivalent to a light-emitting device. The set emission angle range includes α2 to α1. Within the emission angle range of α2 to α1, the emission light intensity distribution generated by the diffusion layer 2 when collimated light is incident perpendicularly satisfies that the ratio of the minimum light intensity to the maximum light intensity is greater than 0.5 within the emission angle range of -10° to 10°.

[0068] In some embodiments, α2 = -10°, α1 = 10°, that is, the set emission angle range includes -10° to 10°. When collimated light is incident perpendicularly, the emission light intensity distribution generated by the diffusion layer 2 satisfies that the ratio of the minimum light intensity to the maximum light intensity is greater than 0.5 within the emission angle range of -10° to 10°. This can improve the uniformity of the intensity distribution of light emitted from the display panel and irradiated onto the anti-glare layer through the diffusion layer, thereby improving the uniformity of light scattering on the surface of the anti-glare layer and avoiding the occurrence of local concentration of light intensity on the surface of the glare layer. Thus, while suppressing glare, it can also improve the flicker situation.

[0069] In some embodiments, the set emission angle range includes -5° to 5°, which can also improve the uniformity of the intensity distribution of light emitted from the display panel and irradiated onto the anti-glare layer through the diffusion layer. This improves the uniformity of light scattering on the surface of the anti-glare layer and avoids the occurrence of local concentration of light intensity on the surface of the glare layer, thereby improving the flicker point while suppressing glare.

[0070] In some embodiments, the transmittance of the diffusion layer 2 is greater than 85% at all angles, which can avoid the reduction of the light emission efficiency of the display module due to the addition of the diffusion layer 2.

[0071] In some embodiments, please refer to Figures 1 and 4. Figure 4 is a schematic diagram of the optical path of the diffusion layer in the display module provided in the embodiment of this application. The diffusion layer 2 includes a substrate layer 21 and a light diffuser 22 disposed in the substrate layer 21. The refractive index of the light diffuser 22 is greater than that of the substrate layer 21. Since the refractive index of the light diffuser 22 is greater than that of the substrate layer 21, light entering the interior of the light diffuser 22 can undergo total internal reflection when it reaches the interface between the light diffuser 22 and the substrate layer 21. This changes the direction of the light emitted by the display panel, improves the uniformity of the intensity distribution of the light emitted by the display panel that passes through the diffusion layer and illuminates the anti-glare layer, thereby improving the uniformity of the scattering of light emitted by the display panel on the surface of the anti-glare layer and avoiding the occurrence of local concentration of light intensity on the surface of the anti-glare layer. Thus, while suppressing glare, it can also improve the flicker situation.

[0072] In some embodiments, the refractive index of the light diffuser 22 and the refractive index of the substrate layer 21 satisfy the condition: n1-n2 > 0.05. For example, the difference between the refractive index of the light diffuser 22 and the refractive index of the substrate layer 21 is 0.06, 0.07, 0.08, 0.09, or 0.1, etc. It should be noted that when the difference in refractive index between the light diffuser 22 and the substrate layer 21 is small (i.e., n1-n2 ≤ 0.05), the critical angle for total internal reflection at the interface between the light diffuser 22 and the substrate layer 21 is large. At this time, a large incident angle is required for total internal reflection to occur at the interface between the light diffuser 22 and the substrate layer 21. Only a small portion of the light can meet the condition for total internal reflection at the interface between the light diffuser 22 and the substrate layer 21, resulting in poor diffusion effect of the diffusion layer 2. By limiting the difference in refractive index between the light diffuser 22 and the substrate layer 21 to above 0.05, the diffusion effect of the diffusion layer 2 can be improved. By reducing the total emission critical angle at the interface between the light diffuser 22 and the substrate layer 21, most of the light can meet the condition of total internal reflection at the interface between the light diffuser 22 and the substrate layer 21. This can change the direction of most of the light emitted by the display panel, improve the uniformity of the intensity distribution of the light emitted by the display panel that passes through the diffuser layer and shines on the anti-glare layer, thereby improving the uniformity of the scattering of light emitted by the display panel on the surface of the anti-glare layer and avoiding the occurrence of local concentration of light intensity on the surface of the glare layer. Thus, while suppressing glare, it can also improve the flicker situation.

[0073] In some embodiments, the refractive index of the light diffuser 22 and the refractive index of the substrate layer 21 satisfy the condition: n1-n2>0.1. For example, the difference between the refractive index of the light diffuser 22 and the refractive index of the substrate layer 21 is 0.1, 0.12, 0.15, 0.18, or 0.2, etc.

[0074] In some embodiments, the light diffuser 22 includes a plurality of light guide pillars 221 arranged in an array in the substrate layer 21.

[0075] Please refer to Figures 4 and 5. Figure 5 is a top view of the diffusion layer in the display module provided in the embodiment of this application. The light diffuser 22 includes a plurality of light guide pillars 221. The plurality of light guide pillars 221 are arranged in a row at intervals along the first direction X and the plurality of light guide pillars 221 are arranged in a row at intervals along the second direction Y. The light diffuser 22 has m rows * n columns of light guide pillars 221, where m and n are both positive integers. m and n can be set according to the size and pixel density of the display panel 1. The first direction X and the second direction Y are perpendicular to each other.

[0076] In some embodiments, referring to Figure 4, the refractive index of the light guide post 221 is greater than that of the substrate layer 21. After the light emitted from the sub-pixel 111 enters the light guide post 221, total internal reflection occurs at the interface between the light guide post 221 and the substrate layer 21. After the light undergoes one or more total internal reflections within the light guide post 221, the emission angle changes, thereby improving the uniformity of the intensity distribution of the light emitted from the display panel that passes through the diffusion layer and illuminates the anti-glare layer. This improves the uniformity of the scattering of light emitted from the display panel on the surface of the anti-glare layer, avoiding the occurrence of local concentration of light intensity on the surface of the glare layer. Thus, while suppressing glare, it can also improve the flicker situation.

[0077] In some embodiments, the substrate layer 21 is made of acrylic material, and the light guide post 221 is made of acrylic material.

[0078] In some embodiments, please refer to FIG5, the cross-sectional shape of the light guide post 221 is circular, that is, the light guide post 221 is cylindrical.

[0079] In some embodiments, please refer to Figures 4 and 5. The angle between the axial direction of the light guide post 221 and the thickness direction of the substrate layer 21 is 0°. That is, the axial direction of the light guide post 221 is parallel to the thickness direction of the substrate layer 21. The thickness direction of the substrate layer 21 is parallel to the third direction Z shown in Figure 4. The third direction Z is perpendicular to the plane defined by the first direction X and the second direction Y.

[0080] In some embodiments, please refer to FIG6, which is a schematic diagram of another diffusion layer in the display module provided by the embodiments of this application. It is roughly the same as the diffusion layer shown in FIG4, except that the angle α3 between the axial direction of the light guide post 221 and the thickness direction of the substrate layer 21 is 45°.

[0081] In some embodiments, the angle α3 between the axial direction of the light guide post 221 and the thickness direction of the substrate layer 21 is not limited to 0° and 45° in the above embodiments, but can also be 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, etc. As long as it is between 0° and 45°, it can ensure that most of the light can meet the condition of total internal reflection at the interface between the light diffuser 22 and the substrate layer 21, thereby improving the uniformity of the intensity distribution of the light emitted by the display panel that passes through the diffuser layer and illuminates the anti-glare layer, thereby improving the uniformity of the scattering of the light emitted by the display panel on the surface of the anti-glare layer.

[0082] In some embodiments, the shape of the cross-section of the light guide post 221 is not limited to the circle in the above embodiments, and the cross-sectional shape of the light guide post 221 may also be elliptical.

[0083] In some embodiments, the diameters or the diameters and heights of the plurality of light guide pillars 221 in the light diffuser 22 are the same. In other embodiments, the diameters or the diameters of the circumscribed circles of the plurality of light guide pillars 221 in the light diffuser 22 may be different. For example, the plurality of light guide pillars 221 with different diameters or the diameters of their circumscribed circles in the light diffuser 22 may be arranged in an array, or the plurality of light guide pillars 221 with different diameters or the diameters of their circumscribed circles may be arranged periodically as a whole.

[0084] In some embodiments, please refer to Figure 4, the diameter of the light guide post 221 or the diameter of the circumscribed circle of the light guide post 221 and the center distance between any two adjacent light guide posts 221 satisfy: 1 / 3≤d1 / (d2-d1)≤3, where d1 is the diameter of the light guide post 221 or the diameter of the circumscribed circle of the light guide post 221, and d2 is the center distance between any two adjacent light guide posts 221.

[0085] It should be noted that if d1 / (d2-d1) is less than 1 / 3, it means that the center distance between adjacent light guide pillars 221 is large, and the distribution of light guide pillars 221 is relatively sparse. Some of the light emitted by the display panel can be emitted through the substrate layer 21 between the light guide pillars 221. The emission direction of this part of the light is not changed by the diffusion layer 2, resulting in poor diffusion effect of the diffusion layer 2. The intensity distribution of the light illuminating the surface of the cover plate 3 is uneven, and there will still be flashes. If d1 / (d2-d1) is greater than 3, it means that the center distance between adjacent light guide pillars 221 is small, and the distribution of light guide pillars 221 is relatively dense. This is not conducive to the curing of the material of the light guide pillars 221 by the dot matrix light source in the manufacturing process. Therefore, by ensuring that the diameter of the light guide post 221 or the diameter of the circumscribed circle of the light guide post 221 and the center distance between any two adjacent light guide posts 221 satisfy: 1 / 3≤d1 / (d2-d1)d2≤3, it is not only beneficial to prepare the diffusion layer 2 containing the light guide post 221, but also to ensure that the distribution density of the light guide post 221 is moderate, which can improve the uniformity of the intensity distribution of the light emitted from the display panel and irradiated onto the anti-glare layer through the diffusion layer.

[0086] In some embodiments, please refer to Figures 4 and 5. When the light guide post 221 is a cylinder, the diameter d1 of the light guide post 221 and the center distance d2 of any two adjacent light guide posts 221 satisfy: 1 / 3≤d1 / (d2-d1)≤3.

[0087] In some embodiments, when the light guide post 221 is an elliptical cylinder, the diameter d1 of the circumcircle of the light guide post 221 and the center distance d2 of any two adjacent light guide posts 221 satisfy: 1 / 3≤d1 / (d2-d1)≤3.

[0088] In some embodiments, the diameter of the light guide post 221 or the diameter of the circumcircle of the light guide post 221 and the center distance between any two adjacent light guide posts 221 satisfy: 1 / 2≤d1 / (d2-d1)≤2.

[0089] In some embodiments, referring to FIG4, the display panel 1 includes a plurality of sub-pixels 111. The diameter of the light guide post 221 or the diameter of the outer circle of the light guide post 221 and the diameter of the smallest sub-pixel 111 or the diameter of the outer circle of the sub-pixel 111 satisfy: d1 / d3 < 0.5, where d1 is the diameter of the light guide post 221 or the diameter of the outer circle of the light guide post 221, and d3 is the diameter of the smallest sub-pixel 111 or the diameter of the outer circle of the sub-pixel 111. Specifically, the diameter of the sub-pixel 111 or the diameter of the outer circle of the sub-pixel 111 refers to: when the shape of the sub-pixel 111 is circular, the diameter of the sub-pixel 111 is the diameter of the light-emitting material layer in each light-emitting device; when the shape of the sub-pixel 111 is elliptical or other shapes, the diameter of the outer circle of the sub-pixel 111 refers to the diameter of the outer circle of the light-emitting material layer in each light-emitting device.

[0090] It should be noted that when the diameter of the light guide post 221 or the diameter of its circumscribed circle is too large (i.e., d1 / d3 ≥ 0.5), some of the light entering the light guide post 221 will exit without total internal reflection. The direction of this portion of light will not change, resulting in poor diffusion effect of the diffusion layer 2. By limiting the ratio of the diameter of the light guide post 221 or its circumscribed circle to the diameter of the smallest sub-pixel 111 or its circumscribed circle to within 0.5, it can be ensured that most of the light emitted by the sub-pixel can undergo total internal reflection within the light guide post 221, thereby improving the uniformity of the intensity distribution of the light emitted from the display panel and illuminating the anti-glare layer through the diffusion layer.

[0091] In some embodiments, referring to FIG4, the diameter of the light guide post 221 or the diameter of the outer circle of the light guide post 221 and the diameter of the smallest sub-pixel 111 or the diameter of the outer circle of the sub-pixel 111 satisfy: d1 / d3 < 0.3.

[0092] In some embodiments, please refer to FIG4, the thickness of the substrate layer 21 is the same as the height of the light guide post 221, that is, the upper surface of the substrate layer 21 is flush with the upper surface of the light guide post 221, and the lower surface of the substrate layer 21 is flush with the lower surface of the light guide post 221. It can be considered that the light guide post 221 is embedded in the substrate layer 21 and penetrates the substrate layer 21.

[0093] In some embodiments, referring to Figure 4, the thickness of the diffusion layer 2 is greater than or equal to 20 micrometers and less than or equal to 200 micrometers. For example, the thickness of the diffusion layer 2 is 20 micrometers, 30 micrometers, 40 micrometers, 50 micrometers, 70 micrometers, 100 micrometers, 120 micrometers, 150 micrometers, 170 micrometers, or 200 micrometers, etc. It should be noted that the greater the thickness of the diffusion layer 2, the better the diffusion effect. When the thickness of the diffusion layer 2 is too large, it will increase the thickness of the display module, and the process will be difficult to achieve. By limiting the thickness of the diffusion layer 2 to between 20 micrometers and 200 micrometers, the uniformity of the intensity distribution of light emitted from the display panel and irradiated onto the anti-glare layer after passing through the diffusion layer can be improved while taking into account the thickness of the display module. This improves the uniformity of light scattering on the surface of the anti-glare layer, thereby improving the flicker point situation.

[0094] In the embodiment shown in Figure 1, the cover plate 3 is made of glass. By forming a plurality of protrusions 31 on the surface of the cover plate 3 away from the diffusion layer 2, a textured surface is formed on the surface of the cover plate 3 away from the diffusion layer 2. This can prevent the display panel 1 from being scratched and improve the glare situation.

[0095] In some embodiments, please refer to FIG1, the display module 100 further includes a polarizing layer 4, which is disposed between the diffusion layer 2 and the display panel 1.

[0096] In some embodiments, please refer to FIG1, the display module 100 further includes a first adhesive layer 5, which is disposed between the diffusion layer 2 and the cover plate 3. The first adhesive layer 5 is used to bond the diffusion layer 2 and the cover plate 3. The material of the first adhesive layer 5 can be optical adhesive.

[0097] In some embodiments, referring to FIG1, the display module 100 further includes a second adhesive layer 6, which is disposed between the display panel 1 and the polarizing layer 4. The second adhesive layer 6 is used to bond the polarizing layer 4 to the display panel 1, and the material of the second adhesive layer 6 can be optical adhesive.

[0098] In some embodiments, please refer to FIG1, the display module 100 further includes a third adhesive layer 7, which is disposed between the polarizing layer 4 and the diffusion layer 2. The third adhesive layer 7 is used to bond the diffusion layer 2 and the polarizing layer 4 together. The material of the third adhesive layer 7 can be optical adhesive.

[0099] In some embodiments, please refer to FIG7, which is a schematic diagram of another display module provided by the embodiments of this application. Its structure is roughly the same as that of the display module shown in FIG1, except that: the diffusion layer 2 is a haze film. The diffusion layer 2 includes a substrate layer 21 and diffusion particles 23. The diffusion particles 23 are distributed in the substrate layer 21. The refractive index of the diffusion particles 23 is greater than that of the substrate layer 21. The diffusion particles 23 can refract and reflect light to change the exit angle of the light so that the size of the light spot formed on the cover plate when the collimated light is incident perpendicularly is greater than the distance between adjacent protrusions. This allows more light to be irradiated onto the protrusions and dispersed by the protrusions, preventing the light from bypassing the protrusions. This improves the uniformity of light scattering on the surface of the cover plate, thereby improving the uniformity of the intensity distribution of the light emitted by the display panel that passes through the diffusion layer and is irradiated onto the anti-glare layer. This improves the uniformity of light scattering on the surface of the anti-glare layer, thereby improving the flicker situation.

[0100] Please refer to Figure 3. Figure 3 is a schematic diagram of the light diffusion effect of the diffusion layer in the display module provided by the embodiment of this application. Figure 3(a) shows the distribution of the specific intensity of light emitted by the non-diffuse light source 8 without any optical film. Without any optical film, the intensity of the light emitted by the non-diffuse light source 8 is concentrated within a very small emission angle range. Figure 3(b) shows the distribution of the specific intensity of light emitted by the non-diffuse light source 8 with the diffusion layer 2. The diffusion layer 2 in (b) is composed of a substrate layer 21 and diffusion particles 23. When the collimated light emitted by the non-diffuse light source 8 enters the diffusion layer 2 perpendicularly, the emission angle range of the emitted light intensity distribution is increased. Figure 3(c) illustrates the distribution of specific intensity of light from the non-diffuse light source 8 in the display module provided by the embodiment of this application when a diffuser layer 2 is provided. The diffuser layer 2 in (c) consists of a substrate layer 21 and a light guide column 221. When a diffuser layer 2 is provided, and a light guide column 221 is provided in the substrate layer 21 of the diffuser layer 2, the output light intensity generated when the collimated light emitted by the non-diffuse light source 8 is perpendicularly incident on the diffuser layer 2 is relatively uniformly distributed within the output angle range of -10° to 10°. According to the above comparison, the embodiment of this application, by adding a diffuser layer 2 between the display panel 1 and the cover plate 3, can improve the uniformity of the intensity distribution of light emitted from the display panel that passes through the diffuser layer and illuminates the anti-glare layer. This improves the uniformity of light scattering on the surface of the anti-glare layer and avoids the occurrence of local concentration of light intensity on the surface of the glare layer. Thus, it can suppress glare while improving the flicker situation.

[0101] Based on the display panel provided in the above embodiments of this application, embodiments of this application also provide a display device. Please refer to FIG8, which is a schematic structural diagram of the display device provided in an embodiment of this application. The display device 1000 includes a display module 100 and a housing 200. The display module 100 is disposed on the housing 200, and the display module 100 can be the display panel provided in any of the above embodiments. The display device provided in the embodiments of this application can achieve the same technical effects as the display panel provided in any of the above embodiments, and will not be elaborated upon here.

[0102] The beneficial effects of the embodiments of this application are as follows: The embodiments of this application provide a display module and a display device. The display module includes a display panel, a diffusion layer, and a cover plate. The cover plate includes an anti-glare layer. By adding a diffusion layer between the anti-glare layer and the display panel, and forming multiple protrusions on the surface of the cover plate away from the diffusion layer, the diffusion layer is used to ensure that the size of the light spot formed on the cover plate by the outgoing light generated when collimated light is incident perpendicularly is greater than the distance between adjacent protrusions. This allows more light to be irradiated onto the protrusions and dispersed by the protrusions, preventing the light from bypassing the protrusions. This improves the uniformity of light scattering on the surface of the cover plate. In this way, the uniformity of the intensity distribution of the light emitted from the display panel and irradiated onto the anti-glare layer through the diffusion layer can be improved, avoiding the occurrence of local concentration of light intensity on the surface of the glare layer. Thus, while suppressing glare, the flicker situation can be improved.

[0103] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0104] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0105] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0106] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution 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; as well as 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 diffusion layer has a plurality of protrusions; The diffusion layer is used to ensure that the size of the light spot formed on the cover plate by the outgoing light generated when the collimated light is incident perpendicularly is greater than the distance between adjacent protrusions.

2. The display module as described in claim 1, wherein, The intensity distribution of the emitted light generated by the diffusion layer when collimated light is incident perpendicularly satisfies: cd1 / cd2 > 0.5, where cd1 is the minimum light intensity within the set emission angle range, and cd2 is the maximum light intensity within the set emission angle range.

3. The display module as described in claim 2, wherein, The intensity distribution of the outgoing light generated by the diffusion layer when collimated light is incident perpendicularly satisfies: cd1 / cd2>0.

8.

4. The display module as described in claim 2, wherein, The set emission angle range includes -30° to 30°.

5. The display module as described in claim 4, wherein, The set emission angle range includes -10° to 10°.

6. The display module as described in claim 1, wherein, The diffusion layer includes a substrate layer and a light diffuser disposed in the substrate layer, wherein the refractive index of the light diffuser is greater than the refractive index of the substrate layer.

7. The display module as described in claim 6, wherein, The refractive index of the light diffuser and the refractive index of the substrate layer satisfy the following condition: n1-n2>0.05, where n1 is the refractive index of the light diffuser and n2 is the refractive index of the substrate layer.

8. The display module as described in claim 6, wherein, The light diffuser includes multiple light guide pillars arranged in an array.

9. The display module as described in claim 8, wherein, The angle between the axial direction of the light guide column and the thickness direction of the substrate layer is greater than or equal to 0° and less than or equal to 45°.

10. The display module as claimed in claim 8, wherein, The diameter of the light guide post or the diameter of the circumcircle of the light guide post and the center distance between any two adjacent light guide posts satisfy the following condition: 1 / 3≤d1 / (d2-d1)≤3, where d1 is the diameter of the light guide post or the diameter of the circumcircle of the light guide post, and d2 is the center distance between any two adjacent light guide posts.

11. The display module as claimed in claim 10, wherein, The diameter of the light guide post or the diameter of the circumcircle of the light guide post and the center distance between any two adjacent light guide posts satisfy the following condition: 1 / 2≤d1 / (d2-d1)≤2.

12. The display module as claimed in claim 8, wherein, The display panel includes multiple sub-pixels. The diameter of the light guide column or the diameter of the outer circle of the light guide column and the diameter of the smallest sub-pixel or the diameter of the outer circle of the sub-pixel satisfy: d1 / d3 < 0.5, where d1 is the diameter of the light guide column or the diameter of the outer circle of the light guide column, and d3 is the diameter of the smallest sub-pixel or the diameter of the outer circle of the sub-pixel.

13. The display module as described in claim 12, wherein, The diameter of the light guide post or the diameter of the circumcircle of the light guide post satisfies the condition that d1 / d3 < 0.3 with respect to the diameter of the smallest sub-pixel or the diameter of the circumcircle of the sub-pixel.

14. The display module as described in claim 8, wherein, The thickness of the substrate layer is the same as the height of the light guide column.

15. The display module as claimed in claim 1, wherein, The diffusion layer includes a substrate layer and diffusion particles disposed in the substrate layer, wherein the refractive index of the diffusion particles is greater than the refractive index of the substrate layer.

16. The display module as claimed in claim 1, wherein, The thickness of the diffusion layer is greater than or equal to 20 micrometers and less than or equal to 200 micrometers.

17. The display module as claimed in claim 1, wherein, The diffusion layer has a full-angle transmittance of more than 85%.

18. The display module as claimed in claim 1, wherein, The display module further includes a polarizing layer, which is disposed between the diffusion layer and the display panel.

19. A display device comprising a display module as described in any one of claims 1 to 18.

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