Display module and display device

Abstract

The invention provides a display module and a display device.The display module comprises a display panel, a diffusion layer and a cover plate, the surface, away from the diffusion layer, of the cover plate is provided with a plurality of protruding parts, and the diffusion layer is additionally arranged between the cover plate and the display panel; the diffusion layer is used for enabling the size of a light spot formed on the cover plate by emergent light generated when the collimated light vertically enters to be larger than the distance between the adjacent protruding parts, and therefore the uniformity of intensity distribution of light rays emitted by the display panel and irradiated to the cover plate through the diffusion layer can be improved. The situation that the intensity of light rays is locally concentrated on the surface of the cover plate is avoided, and therefore the situation of a flash point can be improved while glare is restrained.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a display module and a display device. Background Art

[0002] Glare is an undesirable optical phenomenon caused by the mirror reflection of the cover surface of the display module, which will greatly reduce the visibility of the display module and have a long-term impact on eye health. The surface of the cover is textured, so that the surface of the cover changes from a mirror surface to a rough surface. The rough surface can produce a more uniform diffuse reflection of the ambient light irradiated to the surface of the cover, thereby improving the glare situation and improving the visibility of the display module.

[0003] Texturing the surface of the cover plate can cause other problems, typically an optical defect known as flash. Flash is a phenomenon in which the human eye observes unevenly distributed color dots on the display screen. Texturing makes the surface of the cover plate have irregular undulations, and the light emitted by the pixels is unevenly scattered on the textured surface, resulting in uneven distribution of light intensity and chromaticity. Users can see flash when viewing the display screen. Flash is also affected by the pixel density of the display panel. The higher the pixel density, the more severe the flash. When the pixel density exceeds 250, flash will seriously affect the viewing experience.

[0004] Therefore, it is necessary to provide a display module and a display device to improve this defect. Summary of the invention

[0005] The embodiments of the present application provide a display module and a display device, which can improve the flash point situation.

[0006] In order to achieve the above object, according to a first aspect of the present application, a display module is provided, comprising:

[0007] Display panel;

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

[0009] A cover plate, arranged on a side of the diffusion layer away from the display panel, wherein a 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 vertically is larger than the spacing between adjacent protrusions.

[0011] Optionally, the emission light intensity distribution generated by the diffusion layer when the collimated light is vertically incident satisfies: cd1 / cd2>0.5, wherein cd1 is the minimum light intensity within a set emission angle range, and cd2 is the maximum light intensity within the set emission angle range.

[0012] Optionally, when collimated light is incident vertically, the intensity distribution of the emitted light generated by the diffusion layer satisfies: cd1 / cd2>0.8.

[0013] Optionally, the set emission angle range includes -30° to 30°.

[0014] Optionally, the set emission angle range includes -10° to 10°.

[0015] Optionally, the diffusion layer includes a base layer and a light diffuser disposed in the base layer, and a refractive index of the light diffuser is greater than a refractive index of the base layer.

[0016] Optionally, the refractive index of the light diffuser and the refractive index of the base layer satisfy: n1-n2>0.05, wherein n1 is the refractive index of the light diffuser, and n2 is the refractive index of the base layer.

[0017] Optionally, the light diffuser includes a plurality of light guide rods arranged in an array.

[0018] Optionally, an angle between an axial direction of the light guide column and a thickness direction of the base layer is greater than or equal to 0° and less than or equal to 45°.

[0019] Optionally, the diameter of the light guide column or the diameter of the circumscribed circle of the light guide column and the center distance between any two adjacent light guide columns satisfy: 1 / 3≤d1 / (d2-d1)≤3, where d1 is the diameter of the light guide column or the diameter of the circumscribed circle of the light guide column, and d2 is the center distance between any two adjacent light guide columns.

[0020] Optionally, the diameter of the light guide column or the diameter of the circumscribed circle of the light guide column and the center distance of any two adjacent light guide columns satisfy: 1 / 2≤d1 / (d2-d1)≤2.

[0021] Optionally, the display panel includes multiple sub-pixels, and the diameter of the light guide column or the diameter of the circumscribed circle of the light guide column and the diameter of the smallest sub-pixel or the diameter of the circumscribed circle of the sub-pixel satisfy: d1 / d3<0.5, wherein d1 is the diameter of the light guide column or the diameter of the circumscribed circle of the light guide column, and d3 is the smallest diameter of the sub-pixel or the diameter of the circumscribed circle of the sub-pixel.

[0022] Optionally, the diameter of the light guide column or the diameter of the circumscribed circle of the light guide column and the diameter of the smallest sub-pixel or the diameter of the circumscribed circle of the sub-pixel satisfy: d1 / d3<0.3.

[0023] Optionally, the thickness of the base layer is the same as the height of the light guide column.

[0024] Optionally, the diffusion layer includes a base layer and diffusion particles disposed in the base layer, and a refractive index of the diffusion particles is greater than a refractive index of the base layer.

[0025] Optionally, the diffusion layer has a thickness greater than or equal to 20 micrometers and less than or equal to 200 micrometers.

[0026] Optionally, the full-angle transmittance of the diffusion layer is greater than 85%.

[0027] Optionally, the display module further includes a polarizing layer, and the polarizing layer is disposed between the diffusion layer and the display panel.

[0028] According to a second aspect of the present application, a display device is provided, comprising the display panel as described above.

[0029] In the display module of the embodiment of the present application, a diffusion layer is added between the cover plate and the display panel, and a plurality of 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 vertically larger than the spacing between adjacent protrusions. More light can be irradiated onto the protrusions and scattered by the protrusions to avoid the light bypassing the protrusions, thereby improving the uniformity of light scattering on the cover plate surface. In this way, the uniformity of the intensity distribution of the light emitted by the display panel and irradiated onto the cover plate through the diffusion layer can be improved, and the local concentration of light intensity on the cover plate surface can be avoided, thereby suppressing glare while improving the flash point situation.

[0030] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0032] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0033] Figure 1 A schematic diagram of the structure of a display module provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of a diffusion layer in a display module provided in an embodiment of the present application;

[0035] Figure 3A schematic diagram of the light diffusion effect of the diffusion layer in the display module provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of the light path of a diffusion layer in a display module provided in an embodiment of the present application;

[0037] Figure 5 A top view of a diffusion layer in a display module provided in an embodiment of the present application;

[0038] Figure 6 A schematic diagram of the structure of another diffusion layer in a display module provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0040] Figure 8 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0041] Description of reference numerals:

[0042] 1. display panel; 11. light emitting device layer; 111. sub-pixel;

[0043] 2. diffusion layer; 21. substrate layer; 22. light diffuser; 221. light guide column; 23. diffusion particles;

[0044] 3. Cover plate; 31. Raised portion;

[0045] 4. Polarizing layer;

[0046] 5. First adhesive layer;

[0047] 6. Second adhesive layer;

[0048] 7. The third adhesive layer;

[0049] 8. Non-diffused light source;

[0050] 100. Display module; 200. Housing; 1000. Display device. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0052] An embodiment of the present application provides a display module, which includes a display panel, a diffusion layer and a cover plate. The diffusion layer is arranged on the light-emitting side of the display panel, and the cover plate is arranged on the side of the diffusion layer away from the display panel. The surface of the cover plate away from the diffusion layer has a plurality of protrusions. 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 vertically incident be larger than the spacing between adjacent protrusions.

[0053] In an embodiment of the present application, a diffusion layer is added between the anti-glare layer and the display panel, and a plurality of raised portions 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 vertically incident larger than the spacing between adjacent raised portions, so that more light can be irradiated onto the raised portions and scattered by the raised portions to avoid the light from bypassing the raised portions, thereby improving the uniformity of scattering of the light emitted by the display panel on the surface of the cover plate. In this way, 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 improved, and the intensity of the light can be avoided from being locally concentrated on the surface of the glare layer, thereby suppressing glare while improving the flash point situation.

[0054] See also Figure 1 , Figure 1 The structural diagram of the display module provided in the embodiment of the present application, the display module 100 comprises a display panel 1, a diffusion layer 2 and a cover plate 3, the diffusion layer 2 is arranged on the light-emitting side of the display panel 1, the cover plate 3 is arranged on the side of the diffusion layer 2 away from the display panel 1, and the surface of the cover plate 3 away from the diffusion layer 2 has a plurality of protrusions 31. The protrusions 31 can reflect or refract the outgoing light passing through the diffusion layer 2, thereby changing the outgoing direction of the outgoing light, so that the outgoing light is reflected on the surface of the cover plate 3 away from the diffusion layer 2, forming diffuse reflection, thereby achieving an anti-glare effect. By making the diffusion layer 2 used to make the size of the light spot formed on the cover plate 3 by the outgoing light generated when the collimated light emitted by the light-emitting device in the display panel 1 is vertically incident be larger than the spacing between adjacent protrusions 31, more light can be irradiated onto the protrusions 31 and scattered by the protrusions 31, thereby preventing the light from bypassing the protrusions 31, thereby improving the uniformity of light scattering on the cover plate surface. In this way, the uniformity of the intensity distribution of the light emitted by the display panel and irradiated onto the cover plate through the diffusion layer can be improved, and the local concentration of the light intensity on the cover plate surface can be avoided, thereby suppressing glare while improving the flash point situation.

[0055] See also Figure 1The size of the light spot refers to the diameter of the light spot or the diameter of the circumscribed circle of the light spot. When the shape of the light spot formed by the outgoing light generated when the collimated light emitted by the display panel is vertically incident on the diffusion layer 2 and is circular on the surface of the cover plate 3 close to the diffusion layer 2, the size of the light spot is the diameter of the light spot. When the shape of the light spot formed by the outgoing light generated when the collimated light emitted by the display panel is vertically incident on the diffusion layer 2 and is other shapes than circular on the surface of the cover plate 3 close to the diffusion layer 2, the size of the light spot is the diameter of the circumscribed circle of the light spot.

[0056] In some embodiments, the raised portion 31 can form diffuse reflection of the ambient light irradiated to the surface of the cover plate 3, thereby suppressing glare and improving the visibility of the display panel. The diffusion layer 2 is arranged between the cover plate 3 and the display panel 1. The distribution of the outgoing light intensity generated by the diffusion layer 2 when the collimated light is vertically incident satisfies: cd1 / cd2>0.5, where cd1 is the minimum light intensity within the set range of the outgoing angle, and cd2 is the maximum light intensity within the set range of the outgoing angle. The diffusion layer 2 can be used to diffuse the light emitted by the display panel 1 more evenly, and improve the uniformity of the intensity distribution of the light emitted by the display panel through the diffusion layer and irradiated on the anti-glare layer, thereby improving the uniformity of the light emitted by the display panel on the surface of the anti-glare layer, avoiding the occurrence of local concentration of the light intensity on the surface of the glare layer, thereby suppressing glare while improving the flash point situation.

[0057] In some embodiments, the display panel 1 is an organic light emitting diode display panel.

[0058] In some embodiments, the type of the display panel 1 is not limited to the organic light emitting diode display panel in the above embodiments. The display panel 1 can also be any one of a mini light emitting diode display panel, a micro light emitting diode display panel and a liquid crystal display panel.

[0059] In some embodiments, the intensity distribution of the emitted light generated by the diffusion layer 2 when the collimated light is vertically incident satisfies: cd1 / cd2>0.8, for example, cd1 / cd2 is equal to 0.81, 0.83, 0.85, 0.88, 0.9, etc. It only needs to be greater than 0.8 to further improve 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, thereby further improving the uniformity of the scattering of the light emitted by the display panel on the surface of the anti-glare layer, avoiding the occurrence of local concentration of the intensity of the light on the surface of the glare layer, thereby suppressing glare while further improving the flash point situation.

[0060] In some embodiments, see Figure 2 , Figure 2A schematic diagram of a diffusion layer in a display module provided in an embodiment of the present application, wherein a display panel 1 includes a light-emitting device layer 11, and the light-emitting device layer 11 has a plurality of sub-pixels 111 arranged in an array, and each sub-pixel is equivalent to a light-emitting device. The set emission angle range includes α2 to α1, and within the emission angle range of α2 to α1, the emission light intensity distribution generated by the diffusion layer 2 when collimated light is vertically incident satisfies that the ratio of the minimum light intensity to the maximum light intensity within the emission angle range of -10° to 10° is greater than 0.5.

[0061] In some embodiments, α2=-10°, α1=10°, that is, the set emission angle range includes -10° to 10°, and the emission light intensity distribution generated by the diffusion layer 2 when the collimated light is vertically incident satisfies that the ratio of the minimum light intensity to the maximum light intensity within the emission angle range of -10° to 10° is greater than 0.5. In this way, 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 improved, thereby improving the uniformity of the scattering of the light emitted by the display panel on the surface of the anti-glare layer, avoiding the occurrence of local concentration of the light intensity on the surface of the glare layer, thereby suppressing glare while improving the flash point situation.

[0062] In some embodiments, the set emission angle range includes -5° to 5°, which can also improve 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, thereby improving the uniformity of the scattering of the light emitted by the display panel on the surface of the anti-glare layer, avoiding the local concentration of the intensity of the light on the surface of the glare layer, thereby suppressing glare while improving the flash point situation.

[0063] In some embodiments, the full-angle transmittance of the diffusion layer 2 is greater than 85%, so that the light extraction efficiency of the display module is prevented from being reduced due to the addition of the diffusion layer 2 .

[0064] In some embodiments, see Figure 1 and Figure 4 , Figure 4The light path schematic diagram of the diffusion layer in the display module provided in the embodiment of the present application, the diffusion layer 2 includes a base layer 21 and a light diffuser 22 disposed in the base layer 21, and the refractive index of the light diffuser 22 is greater than the refractive index of the base layer 21. Since the refractive index of the light diffuser 22 is greater than the refractive index of the base layer 21, the light entering the light diffuser 22 can be totally reflected when reaching the interface between the light diffuser 22 and the base layer 21, thereby changing the direction of the light emitted by the display panel, improving the uniformity of the intensity distribution of the light emitted by the display panel through the diffusion layer and irradiating the anti-glare layer, thereby improving the uniformity of the light emitted by the display panel scattered on the surface of the anti-glare layer, avoiding the situation that the intensity of the light is locally concentrated on the surface of the glare layer, thereby suppressing the glare and improving the flash point situation.

[0065] In some embodiments, the refractive index of the light diffuser 22 and the refractive index of the base layer 21 satisfy: n1-n2>0.05. For example, the difference between the refractive index of the light diffuser 22 and the refractive index of the base 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 base layer 21 is small (i.e., n1-n2≤0.05), the critical angle of total reflection at the interface between the light diffuser 22 and the base layer 21 is large. At this time, a larger incident angle is required for the light to be totally reflected at the interface between the light diffuser 22 and the base layer 21. Only a small part of the light can meet the conditions for total reflection at the interface between the light diffuser 22 and the base 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 base layer 21 to above 0.05, By reducing the total emission critical angle at the interface between the light diffuser 22 and the base layer 21, most of the light can meet the condition of total reflection at the interface between the light diffuser 22 and the base layer 21. In this way, the direction of most of the light emitted by the display panel can be changed, and the uniformity of the intensity distribution of the light emitted by the display panel and irradiated on the anti-glare layer through the diffusion layer can be improved, thereby improving the uniformity of the scattering of the light emitted by the display panel on the surface of the anti-glare layer, avoiding the occurrence of local concentration of the intensity of the light on the surface of the glare layer, thereby suppressing glare while improving the flash point situation.

[0066] In some embodiments, the refractive index of the light diffuser 22 and the refractive index of the base layer 21 satisfy: n1-n2>0.1. For example, the difference between the refractive index of the light diffuser 22 and the refractive index of the base layer 21 is 0.1, 0.12, 0.15, 0.18 or 0.2.

[0067] In some embodiments, the light diffuser 22 includes a plurality of light guide rods 221 , and the light guide rods 221 are arranged in an array in the base layer 21 .

[0068] See also Figure 4and Figure 5 , Figure 5 A top view of the diffusion layer in the display module provided in an embodiment of the present application, the light diffuser 22 includes a plurality of light guide columns 221, the plurality of light guide columns 221 are arranged in rows at intervals along a first direction X, and the plurality of light guide columns 221 are arranged in rows at intervals along a second direction Y, the light diffuser 22 has m rows and n columns of light guide columns 221, wherein 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, and the first direction X and the second direction Y are perpendicular to each other.

[0069] In some embodiments, see Figure 4 The refractive index of the light guide column 221 is greater than the refractive index of the substrate layer 21. After the light emitted by the sub-pixel 111 enters the light guide column 221, it is totally reflected at the interface between the light guide column 221 and the substrate layer 21. After the light is totally reflected once or multiple times in the light guide column 221, the emission angle changes, thereby improving 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, thereby improving the uniformity of the scattering of the light emitted by the display panel on the surface of the anti-glare layer, avoiding the occurrence of local concentration of the intensity of the light on the surface of the glare layer, thereby suppressing glare while improving the flash point situation.

[0070] In some embodiments, the material of the base layer 21 includes acrylic material, and the material of the light guide column 221 includes acrylic material.

[0071] In some embodiments, see Figure 5 , the cross-section of the light guide column 221 is circular, that is, the light guide column 221 is cylindrical.

[0072] In some embodiments, see Figure 4 and Figure 5 , the angle between the axial direction of the light guide column 221 and the thickness direction of the base layer 21 is 0°, that is, the axial direction of the light guide column 221 is parallel to the thickness direction of the base layer 21, and the thickness direction of the base layer 21 is parallel to Figure 4 The third direction Z is shown, and the third direction Z is perpendicular to the plane defined by the first direction X and the second direction Y.

[0073] In some embodiments, see Figure 6 , Figure 6 A schematic diagram of the structure of another diffusion layer in a display module provided in an embodiment of the present application, which is Figure 4 The structures of the diffusion layers shown are substantially the same, with the difference being that the angle α3 between the axial direction of the light guide column 221 and the thickness direction of the base layer 21 is 45°.

[0074] In some embodiments, the angle α3 between the axial direction of the light guide column 221 and the thickness direction of the base 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. It only needs to be between 0° and 45° to ensure that most of the light can meet the conditions for total reflection at the interface between the light diffuser 22 and the base layer 21, thereby improving the uniformity of the intensity distribution of the light emitted by the display panel through the diffusion layer to 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.

[0075] In some embodiments, the cross-sectional shape of the light guide column 221 is not limited to the circular shape in the above embodiments, and the cross-sectional shape of the light guide column 221 may also be an elliptical shape.

[0076] In some embodiments, the diameters of the plurality of light guide pillars 221 in the light diffuser 22 or the diameters and heights of the circumscribed circles of the light guide pillars 221 are the same. In some other embodiments, the diameters of the plurality of light guide pillars 221 in the light diffuser 22 or the diameters of the circumscribed circles of the light guide pillars 221 may be different. For example, the plurality of light guide pillars 221 in the light diffuser 22 with different diameters or the diameters of the circumscribed circles of the light guide pillars 221 are arranged in an array, and the plurality of light guide pillars 221 with different diameters or the diameters of the circumscribed circles may be arranged periodically as a whole.

[0077] In some embodiments, see Figure 4 , the diameter of the light guide column 221 or the diameter of the circumscribed circle of the light guide column 221 and the center distance between any two adjacent light guide columns 221 satisfy: 1 / 3≤d1 / (d2-d1)≤3, where d1 is the diameter of the light guide column 221 or the diameter of the circumscribed circle of the light guide column 221, and d2 is the center distance between any two adjacent light guide columns 221.

[0078] It should be noted that if d1 / (d2-d1) is less than 1 / 3, it means that the center distance between adjacent light guide columns 221 is large, the distribution of light guide columns 221 is relatively sparse, and part of the light emitted by the display panel can be emitted through the base layer 21 between the light guide columns 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, uneven intensity distribution of the light irradiated on the surface of the cover plate 3, and flash points will still exist. If d1 / (d2-d1) is greater than 3, it means that the center distance between adjacent light guide columns 221 is small, the distribution of light guide columns 221 is relatively dense, which is not conducive to the curing of the material of the light guide columns 221 by the dot matrix light source in the preparation process. Therefore, by making the diameter of the light guide column 221 or the diameter of the circumscribed circle of the light guide column 221 and the center distance between any two adjacent light guide columns 221 satisfy: 1 / 3≤d1 / (d2-d1)d2≤3, it can not only be beneficial to the preparation of the diffusion layer 2 including the light guide column 221, but also ensure that the distribution density of the light guide column 221 is moderate, and can improve 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.

[0079] In some embodiments, see Figure 4 and Figure 5 When the light guide column 221 is a cylinder, the diameter d1 of the light guide column 221 and the center distance d2 of any two adjacent light guide columns 221 satisfy: 1 / 3≤d1 / (d2-d1)≤3.

[0080] In some embodiments, when the light guide column 221 is an elliptical column, the diameter d1 of the circumscribed circle of the light guide column 221 and the center distance d2 of any two adjacent light guide columns 221 satisfy: 1 / 3≤d1 / (d2-d1)≤3.

[0081] In some embodiments, the diameter of the light guide column 221 or the diameter of the circumscribed circle of the light guide column 221 and the center distance of any two adjacent light guide columns 221 satisfy: 1 / 2≤d1 / (d2-d1)≤2.

[0082] In some embodiments, see Figure 4, the display panel 1 includes a plurality of sub-pixels 111, and the diameter of the light guide column 221 or the diameter of the circumscribed circle of the light guide column 221 and the diameter of the smallest sub-pixel 111 or the diameter of the circumscribed circle of the sub-pixel 111 satisfy: d1 / d3<0.5, wherein d1 is the diameter of the light guide column 221 or the diameter of the circumscribed circle of the light guide column 221, and d3 is the diameter of the smallest sub-pixel 111 or the diameter of the circumscribed circle of the sub-pixel 111. The diameter of the sub-pixel 111 or the diameter of the circumscribed 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 circumscribed circle of the sub-pixel 111 refers to the diameter of the circumscribed circle of the light-emitting material layer in each light-emitting device.

[0083] It should be noted that when the diameter of the light guide column 221 or the diameter of the circumscribed circle of the light guide column 221 is too large (i.e., d1 / d3≥0.5), part of the light entering the light guide column 221 is emitted from the light guide column 221 without undergoing total reflection, and the direction of the part of the light does not change, resulting in poor diffusion effect of the diffusion layer 2. By limiting the ratio of the diameter of the light guide column 221 or the diameter of the circumscribed circle of the light guide column 221 to the diameter of the smallest sub-pixel 111 or the diameter of the circumscribed circle of the sub-pixel 111 to within 0.5, it can be ensured that most of the light emitted by the sub-pixel can be totally reflected in the light guide column 221, thereby improving the uniformity of the intensity distribution of the light emitted by the display panel through the diffusion layer and irradiated onto the anti-glare layer.

[0084] In some embodiments, see Figure 4 , the diameter of the light guide column 221 or the diameter of the circumscribed circle of the light guide column 221 and the diameter of the smallest sub-pixel 111 or the diameter of the circumscribed circle of the sub-pixel 111 satisfy: d1 / d3<0.3.

[0085] In some embodiments, see Figure 4 The thickness of the base layer 21 is the same as the height of the light guide column 221, that is, the upper surface of the base layer 21 is flush with the upper surface of the light guide column 221, and the lower surface of the base layer 21 is flush with the lower surface of the light guide column 221. It can be considered that the light guide column 221 is embedded in the base layer 21 and penetrates the base layer 21.

[0086] In some embodiments, see Figure 4, the thickness of the diffusion layer 2 is greater than or equal to 20 microns and less than or equal to 200 microns. For example, the thickness of the diffusion layer 2 is 20 microns, 30 microns, 40 microns, 50 microns, 70 microns, 100 microns, 120 microns, 150 microns, 170 microns or 200 microns. 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, the thickness of the display module will be increased, and the process will be difficult to implement. By limiting the thickness of the diffusion layer 2 to between 20 microns and 200 microns, the uniformity of the intensity distribution of the light emitted by the display panel through the diffusion layer to the anti-glare layer can be improved while taking into account the thickness of the display module, thereby improving the uniformity of the scattering of the light emitted by the display panel on the surface of the anti-glare layer, thereby improving the flash point situation.

[0087] exist Figure 1 In the embodiment shown, the cover plate 3 is made of glass. A plurality of protrusions 31 are formed on the surface of the cover plate 3 away from the diffusion layer 2 so that 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 glare on the other hand.

[0088] In some embodiments, see Figure 1 The display module 100 further includes a polarizing layer 4 , which is disposed between the diffusion layer 2 and the display panel 1 .

[0089] In some embodiments, see Figure 1 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 adhere the diffusion layer 2 to the cover plate 3, and the material of the first adhesive layer 5 may be optical adhesive.

[0090] In some embodiments, see Figure 1 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 adhere the polarizing layer 4 to the display panel 1, and the material of the second adhesive layer 6 may be optical adhesive.

[0091] In some embodiments, see Figure 1 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 may be optical glue.

[0092] In some embodiments, see Figure 7 , Figure 7 A schematic diagram of another display module provided in an embodiment of the present application, the structure of which is similar to Figure 1The structures of the display modules shown are roughly the same, with the difference being that the diffusion layer 2 is a haze film, the diffusion layer 2 includes a base layer 21 and diffusion particles 23, the diffusion particles 23 are distributed in the base layer 21, the refractive index of the diffusion particles 23 is greater than the refractive index of the base layer 21, and the diffusion particles 23 can refract and reflect light to change the emission angle of the light, so that the size of the light spot formed on the cover plate by the outgoing light generated when the collimated light is vertically incident is greater than the spacing between adjacent protrusions, so that more light can be irradiated onto the protrusions and scattered by the protrusions to avoid the light from bypassing the protrusions, thereby improving the uniformity of light scattering on the cover plate surface, thereby improving the uniformity of the intensity distribution of light emitted by the display panel through the diffusion layer to the anti-glare layer, thereby improving the uniformity of light scattering on the surface of the anti-glare layer emitted by the display panel, thereby improving the flash point situation.

[0093] See also Figure 3 , Figure 3 A schematic diagram of the light diffusion effect of the diffusion layer in the display module provided in an embodiment of the present application, Figure 3 (a) shows the distribution of the specific intensity of the light emitted by the non-diffuse light source 8 without any optical film. In the absence of any optical film, the intensity of the light emitted by the non-diffuse light source 8 is concentrated within a very small range of emission angles. Figure 3 (b) illustrates the distribution of the specific intensity of light from a non-diffuse light source 8 when a diffusion layer 2 is provided. The diffusion layer 2 in (b) is composed of a base layer 21 and diffusion particles 23. When the collimated light emitted by the non-diffuse light source 8 enters the diffusion layer 2 vertically, the emission angle range of the emission light intensity distribution generated is increased. Figure 3 (c) shows the distribution of the specific intensity of the light from the non-diffuse light source 8 when the diffusion layer 2 in the display module provided by the embodiment of the present application is provided. The diffusion layer 2 in (c) is composed of a base layer 21 and a light guide column 221. When the diffusion layer 2 is provided and the base layer 21 of the diffusion layer 2 is provided with a light guide column 221, the output light intensity generated when the collimated light emitted by the non-diffuse light source 8 is vertically incident on the diffusion layer 2 is relatively uniformly distributed within the output angle range of -10° to 10°. According to the above comparison, it can be seen that the embodiment of the present application can improve 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 by adding a diffusion layer 2 between the display panel 1 and the cover plate 3, thereby improving the uniformity of the scattering of the light emitted by the display panel on the surface of the anti-glare layer, avoiding the occurrence of local concentration of the light intensity on the surface of the glare layer, thereby suppressing glare while improving the flash point.

[0094] According to the display panel provided in the above embodiment of the present application, the embodiment of the present application further provides a display device, see Figure 8 , Figure 8 The structural schematic diagram of the display device provided in the embodiment of the present application, the display device 1000 includes a display module 100 and a housing 200, the display module 100 is arranged on the housing 200, and the display module 100 can be a display panel provided in any of the above embodiments. The display device provided in the embodiment of the present application can achieve the same technical effect as the display panel provided in any of the above embodiments, which will not be described in detail here.

[0095] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a display module and a display device, the display module and the display device, the display module including a display panel, a diffusion layer and a cover plate, the cover plate including an anti-glare layer, by adding a diffusion layer between the anti-glare layer and the display panel, and forming a plurality of protrusions 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 vertically incident larger than the spacing between adjacent protrusions, so that more light can be irradiated onto the protrusions and scattered by the protrusions to avoid the light from bypassing the protrusions, thereby improving the uniformity of light scattering on the surface of the cover plate, so that the uniformity of the intensity distribution of the light emitted by the display panel through the diffusion layer to the anti-glare layer can be improved, and the local concentration of the light intensity on the surface of the glare layer can be avoided, thereby suppressing glare while improving the flash point situation.

[0096] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0097] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0098] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0099] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display module, characterized in that: include: Display panel; A diffusion layer, disposed on the light-emitting side of the display panel; as well as A cover plate, arranged on a side of the diffusion layer away from the display panel, wherein a 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 vertically is larger than the spacing between adjacent protrusions.

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

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

8.

4. The display module according to claim 2, wherein: The set emission angle range includes -30° to 30°.

5. The display module according to claim 4, characterized in that: The set emission angle range includes -10° to 10°.

6. The display module according to claim 1, wherein: The diffusion layer includes a base layer and a light diffuser disposed in the base layer, and a refractive index of the light diffuser is greater than a refractive index of the base layer.

7. The display module according to claim 6, wherein: The refractive index of the light diffuser and the refractive index of the base layer satisfy: n1-n2>0.05, wherein n1 is the refractive index of the light diffuser, and n2 is the refractive index of the base layer.

8. The display module according to claim 6, wherein: The light diffusion element includes a plurality of light guide rods arranged in an array.

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

10. The display module according to claim 8, wherein: The diameter of the light guide column or the diameter of the circumscribed circle of the light guide column and the center distance between any two adjacent light guide columns satisfy: 1 / 3≤d1 / (d2-d1)≤3, where d1 is the diameter of the light guide column or the diameter of the circumscribed circle of the light guide column, and d2 is the center distance between any two adjacent light guide columns.

11. The display module according to claim 10, wherein: The diameter of the light guide column or the diameter of the circumscribed circle of the light guide column and the center distance of any two adjacent light guide columns satisfy the following condition: 1 / 2≤d1 / (d2-d1)≤2.

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

13. The display module according to claim 12, wherein: The diameter of the light guide column or the diameter of the circumscribed circle of the light guide column and the diameter of the smallest sub-pixel or the diameter of the circumscribed circle of the sub-pixel satisfy the following relationship: d1 / d3<0.

3.

14. The display module according to claim 8, wherein: The thickness of the base layer is the same as the height of the light guide column.

15. The display module according to claim 1, wherein: The diffusion layer includes a base layer and diffusion particles disposed in the base layer, and the refractive index of the diffusion particles is greater than the refractive index of the base layer.

16. The display module according to claim 1, wherein: The diffusion layer has a thickness greater than or equal to 20 micrometers and less than or equal to 200 micrometers.

17. The display module according to claim 1, wherein: The full-angle transmittance of the diffusion layer is greater than 85%.

18. The display module according to claim 1, wherein: The display module further includes a polarizing layer, and the polarizing layer is arranged between the diffusion layer and the display panel.

19. A display device, characterized in that: Comprising a display module as described in any one of claims 1 to 18.

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