Display module and display device

Abstract

The embodiment of the invention provides a display module and a display device. The display module comprises a light guide plate, and the light guide plate is located on one side of the backlight face of a display panel. The light guide plate comprises protruding parts which are arranged in the first direction and extend in the second direction. The heights of the plurality of convex parts in the third direction are not completely equal, and the third direction is a direction perpendicular to the plane where the display module is located. According to the light guide plate, the heights of the multiple protruding parts in the third direction are not completely equal, different heights can be set for the protruding parts in different areas in a targeted mode, for example, the heights of the protruding parts in the areas with the weak light emitting intensity on the light guide plate are correspondingly and adaptively increased, the light condensation effect of the protruding parts in the areas is enhanced, and the light condensation effect of the light guide plate is improved. Therefore, the light-emitting intensity difference between different areas on the light guide plate is reduced, and the light-emitting intensity uniformity of the whole surface of the light guide plate is improved. Therefore, the whole surface of the display panel can accept more uniform light intensity, and the display effects such as display uniformity of the display panel are improved.

Description

Technical Field

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

[0002] A display device includes a backlight unit that can be used to provide backlight for a display panel. One type of backlight unit includes a light guide plate (LGP), typically with multiple raised lenses on the side of the LGP facing the display panel to focus the light distributed by the LGP. However, existing LGPs suffer from significant variations in light intensity at different locations. For example, the light intensity in the center region is greater than that in the side regions. This results in a less uniform light source provided by the LGP to the display panel, which can affect the display quality of the display panel. Summary of the Invention

[0003] In view of this, the present application provides a display module and a display device to solve the above problems.

[0004] In a first aspect, an embodiment of the present application provides a display module, the display module comprising:

[0005] Display panel;

[0006] A light guide plate, located on one side of the backlight surface of the display panel; the surface of the light guide plate facing the display panel is a first surface, and the first surface includes raised portions arranged along a first direction and extending along a second direction; the first direction and the second direction intersect and are both parallel to the plane where the display module is located;

[0007] The heights of the plurality of protrusions along the third direction are not completely equal, and the third direction is a direction perpendicular to the plane where the display module is located.

[0008] In a second aspect, an embodiment of the present application provides a display device, comprising the display module provided in the first aspect.

[0009] In an embodiment of the present application, the heights of the multiple protrusions along the third direction are not completely equal, and the third direction is a direction perpendicular to the plane where the display module is located. The focusing effect of the protrusion is related to the height of the protrusion in the third direction. The higher the height of the protrusion, the stronger the focusing effect, and vice versa. By setting the heights of the multiple protrusions on the same light guide plate to be unequal, different heights can be set for the protrusions in different areas in a targeted manner. For example, for an area on the light guide plate with weaker light output intensity, the height of the protrusion in the area can be adaptively increased, so that the focusing effect of the protrusion in the area is enhanced, thereby reducing the difference in light output intensity between different areas on the light guide plate and improving the uniformity of light output intensity of the entire surface of the light guide plate. This allows the entire surface of the display panel to receive a more uniform light intensity, improving the display uniformity and other display effects of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0011] Figure 1 A schematic cross-sectional view of a display module provided in an embodiment of the present application;

[0012] Figure 2 A schematic plan view of a light guide plate provided in an embodiment of the present application;

[0013] Figure 3 A schematic plan view of another light guide plate provided in an embodiment of the present application;

[0014] Figure 4 A method provided in the embodiment of this application Figure 3 Schematic diagram of the cross section along the A-A' direction;

[0015] Figure 5 A schematic plan view of another light guide plate provided in an embodiment of the present application;

[0016] Figure 6 A method provided in the embodiment of this application Figure 5 Schematic diagram of the cross section along the B-B' direction;

[0017] Figure 7 A schematic plan view of another light guide plate provided in an embodiment of the present application;

[0018] Figure 8 A method provided in the embodiment of this application Figure 7 Schematic diagram of the cross section along C-C';

[0019] Figure 9 A schematic plan view of another light guide plate provided in an embodiment of the present application;

[0020] Figure 10 A method provided in the embodiment of this application Figure 9 Schematic diagram of the cross section along the D-D' direction;

[0021] Figure 11 Another embodiment of the present application provides Figure 5 Schematic diagram of the cross section along the B-B' direction;

[0022] Figure 12 A schematic diagram of preparing a protrusion provided in an embodiment of the present application;

[0023] Figure 13 A comparative schematic diagram of a protrusion provided in an embodiment of the present application;

[0024] Figure 14 A schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0026] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a," "an," and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0028] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0029] In the description of this specification, it is necessary to understand that the words "substantially", "approximately", "approximately", "about", "roughly", "generally" and the like described in the claims and embodiments of this application refer to what can be generally recognized within a reasonable process operation range or tolerance range, rather than an exact value.

[0030] It should be understood that although the terms first, second, etc. may be used to describe surfaces, directions, areas, etc. in the embodiments of the present application, these should not be limited to these terms. These terms are only used to distinguish surfaces, directions, areas, etc. from each other. For example, without departing from the scope of the embodiments of the present application, the first direction may also be referred to as the second direction, and similarly, the second direction may also be referred to as the first direction. The applicant of this case has provided a solution to the problems existing in the prior art through careful and in-depth research.

[0031] Figure 1 A cross-sectional schematic diagram of a display module provided in an embodiment of the present application is shown in FIG. Figure 2 A schematic plan view of a light guide plate provided in an embodiment of the present application.

[0032] The embodiment of the present application provides a display module AA, Figure 1 The display module AA shown includes a display panel 100 and a light guide plate 200 .

[0033] The light guide plate 200 is located on one side of the backlight surface of the display panel 100. The light distributed on the light guide plate 200 can be emitted in the direction of the display panel 100, thereby providing a backlight source for the display panel 100. Figure 2 As shown, the surface of the light guide plate 200 facing the display panel 100 is a first surface 10. The first surface 10 includes raised portions 20 arranged along a first direction X1 and extending along a second direction X2. Here, the first direction X1 and the second direction X2 intersect and are both parallel to the plane where the display module AA is located. The raised portions 20 include a curved surface, with one side of the curved surface of the raised portions 20 facing the display panel 100. The raised portions 20 can form a convergence effect on the light distributed on the light guide plate 200, thereby enhancing the light intensity provided by the light guide plate 200 and improving the efficiency of the backlight provided by the light guide plate 200.

[0034] In the embodiment of the present application, the heights of the multiple raised portions 20 along the third direction X3 are not completely equal, and the third direction X3 is perpendicular to the plane where the display module AA is located. The light-collecting effect of the raised portion 20 is related to its height in the third direction X3. The higher the height of the raised portion 20, the stronger the light-collecting effect, and vice versa. By setting the heights of the multiple raised portions 20 on the same light guide plate 200 to be unequal, the raised portions 20 in different areas can be set to different heights. For example, the height of the raised portion 20 in an area of ​​the light guide plate 200 with weaker light output intensity can be adaptively increased, thereby enhancing the light-collecting effect of the raised portion 20 in that area. This, in turn, reduces the difference in light output intensity between different areas of the light guide plate 200 and improves the uniformity of light output intensity across the entire surface of the light guide plate 200. This allows the entire surface of the display panel 100 to receive a more uniform light intensity, improving the display uniformity and other display effects of the display panel 100.

[0035] In one embodiment of the present application, continue to refer to Figure 2 As shown, the display module AA further includes a plurality of light emitting elements 300, and the plurality of light emitting elements 300 are arranged on one side of the light incident surface 2001 of the light guide plate 200. In the embodiment of the present application, it is taken as an example that the plurality of light emitting elements 300 are located on one side of the light incident surface 2001 of the light guide plate 200 in a direction parallel to the plane where the display module AA is located. Then the light generated by the plurality of light emitting elements 300 can be incident into the light guide plate 200 from the side of the light incident surface 2001, providing a light source for the light guide plate 200. The light incident surface 2001 of the light guide plate 200 extends along the first direction X1, so it can be arranged as follows Figure 2The plurality of light emitting elements 300 are arranged in the first direction X1 , and the plurality of light emitting elements 300 are located on one side of the light guide plate 200 in the second direction X2 .

[0036] Figure 3 A schematic plan view of another light guide plate provided in an embodiment of the present application is shown. Figure 4 A method provided in the embodiment of this application Figure 3 Schematic diagram of the cross section along the A-A' direction.

[0037] In one embodiment of the present application, Figure 3 、 Figure 4 As shown, the light guide plate 200 includes a first area 200A and a second area 200B distributed along a first direction X1, and the first area 200A is located between the two second areas 200B. Figure 4 In the illustrated light guide plate 200, the first region 200A is located near the middle of the light guide plate 200 in the first direction X1. In related art, at least a portion of the light within the second region 200B will be scattered into the first region 200A. The two second regions 200B located on either side of the first region 200A will each have a portion of the light scattered into the first region 200A, resulting in a stronger light intensity within the first region 200A. From the perspective of the second regions 200B, the second region 200B is located near the edge of the light guide plate 200. Of course, a portion of the light within the first region 200A will also be scattered into the second regions 200B. However, since one side of the second region 200B in the first direction X1 is adjacent to the first region 200A and the other side is adjacent to the edge of the light guide plate 200, it can be understood that the light intensity within the second region 200B will be slightly weaker than that within the first region 200A.

[0038] Therefore, in order to reduce the difference in light intensity between the first area 200A and the second area 200B, the height of at least part of the protrusions 20 in the second area 200B in the third direction X3 is set to be greater than the height of the protrusions 20 in the first area 200A in the third direction X3. Figure 4 As shown, the heights of the protrusions 20 in the second area 200B can be set to be equal and greater than the heights of the protrusions 20 in the first area 200A, which is beneficial to improving the focusing effect of the protrusions 20 in the second area 200B, thereby improving the light intensity in the second area 200B.

[0039] In the embodiment of the present application, the height of at least part of the raised portion 20 in the second area 200B is greater than the height of the raised portion 20 located in the first area 200A in the third direction X3, so that the focusing effect of at least part of the raised portion 20 in the second area 200B is greater than the focusing effect of the raised portion 20 located in the first area 200A, thereby improving the focusing effect of light in the second area 200B, improving the light intensity in the second area 200B, reducing the amount of light scattered from the second area 200B into the first area 200A, reducing the difference in light intensity between the first area 200A and the second area 200B, improving the uniformity of light intensity on the entire surface of the light guide plate 200, and thereby improving the display uniformity of the display panel 100.

[0040] Figure 5 A schematic plan view of another light guide plate provided in an embodiment of the present application is shown. Figure 6 A method provided in the embodiment of this application Figure 5 Schematic diagram of the cross section along the BB' direction.

[0041] In one embodiment of the present application, Figure 5 、 Figure 6 As shown, the height of the protrusion 20 in the third direction X3 gradually decreases from the side away from the first area 200A to the side closer to the first area 200A in the second area 200B. In other words, in the second area 200B, the height of the protrusion 20 is higher as it is farther from the first area 200A, and the light-collecting effect of the protrusion 20 is stronger as it is farther from the first area 200A.

[0042] From the perspective of the light distribution within the second area 200B, one side of the second area 200B in the first direction X1 is adjacent to the edge of the light guide plate 200. Therefore, the light near the edge of the light guide plate 200 in the second area 200B is at greater risk of being scattered toward the edge of the light guide plate 200 and then reflected away from the second area 200B, resulting in the light intensity becoming weaker the closer to the edge of the light guide plate 200 in the second area 200B.

[0043] In the embodiment of the present application, a technical solution is proposed in which the raised portion 20 arranged in the second area 200B is higher the closer to the edge of the light guide plate 200, so that in the second area 200B, from the side away from the first area 200A to the side close to the first area 200A, the multiple raised portions 20 have an increasingly higher effect of gathering light, thereby reducing the light intensity difference in the second area 200B, which is conducive to further reducing the light intensity difference between the first area 200A and the second area 200B.

[0044] In one embodiment of the present application, continue to refer to Figure 5-Figure 6As shown, the heights of the multiple protrusions 20 in the first region 200A are equal, and are equal to the height of the smallest protrusion 20 in the second region 200B. This helps ensure similar light-gathering effects for the multiple protrusions 20 in the first region 200A, ensuring uniform light output within the first region 200A. Furthermore, this helps ensure similar light-gathering effects for the protrusions 20 in positions close to those in the first region 200A and the second region 200B, ensuring relatively consistent light intensity in the middle of the light guide plate 200 and avoiding the problem of weakening light intensity in the first region 200A as the height of the protrusions 20 in the first region 200A further decreases.

[0045] In one embodiment of the present application, the height of the largest protrusion 20 in the second region 200B is 5-20 times the height of the smallest protrusion 20 in the first region 200A. When increasing the height of the protrusion 20 in the second region 200B, the height of the protrusion 20 in the second region 200B can be more reasonably determined based on the desired height of the protrusion 20 in the first region 200A and the structure of the light guide plate 200 in the display module AA. In this embodiment of the present application, a reference range is provided for the height of the protrusion 20 in the second region 200B, with the height of the largest protrusion 20 in the second region 200B being at least five times the height of the smallest protrusion 20 in the first region 200A. This helps avoid the problem of the height of the tallest protrusion 20 in the second region 200B being too small to be significantly different from the height of the protrusion 20 in the first region 200A, resulting in ineffective light regulation in the second region 200B and poor light intensity improvement in the second region 200B. In addition, setting the height of the largest raised portion 20 in the second area 200B to be at most 20 times the height of the smallest raised portion 20 in the first area 200A is also beneficial to avoid the height of the raised portion 20 set in the second area 200B being too high, resulting in a large height difference between the raised portions 20 in the first area 200A and the second area 200B, resulting in uneven brightness, and is beneficial to avoid the situation where the raised portion 20 is too high, resulting in the light guide plate 200 occupying a larger film thickness of the display module AA.

[0046] The following are some exemplary parameters proposed by the present application for the setting height of the protrusions 20 in the first area 200A and the second area 200B. For example, if the heights of the multiple protrusions 20 in the first area 200A are equal and all are 0.2 μm, the height of the protrusion 20 with the largest height in the second area 200B can be set between 1 μm and 4 μm; or, if the heights of the multiple protrusions 20 in the first area 200A are equal and all are 0.5 μm, the height of the protrusion 20 with the largest height in the second area 200B can be set between 1 μm and 4 μm. The height of the raised portion 20 can be set between 2.5μm and 10μm; or, taking the case where the heights of the multiple raised portions 20 in the first area 200A are equal and all 1μm as an example, the height of the raised portion 20 with the largest height in the second area 200B can be set between 5μm and 20μm, which is conducive to adaptively setting the height of the raised portion 20 in the second area 200B, so that the display uniformity and thinness of the display module AA can be guaranteed on the basis of utilizing the higher raised portion 20 to enhance the light intensity in the second area 200B.

[0047] Figure 7 A schematic plan view of another light guide plate provided in an embodiment of the present application is shown. Figure 8 A method provided in the embodiment of this application Figure 7 Schematic diagram of the cross section along C-C', Figure 9 A schematic plan view of another light guide plate provided in an embodiment of the present application is shown. Figure 10 A method provided in the embodiment of this application Figure 9 Schematic diagram of the cross section along the D-D' direction.

[0048] In one embodiment of the present application, Figure 7 As shown, within the second region 200B, the height of the protrusions 20 increases from the side away from the first region 200A to the side closer to the first region 200A. Multiple protrusions 20 within each distance x are grouped together. The heights of the protrusions 20 within the same group are equal, and the heights of the protrusions 20 within adjacent groups decrease from group to group along the distance y. When adjusting the protrusions 20 within the second region 200B, the multiple protrusions 20 are grouped and arranged to have the same height within the same group. This helps reduce the difficulty of manufacturing the protrusions 20 within the second region 200B and improves the efficiency of manufacturing the protrusions 20. Furthermore, the heights of the protrusions 20 within the multiple groups increase from group to group in the direction away from the first region 200A within the second region 200B, which helps improve the light focusing effect within the second region 200B and reduce the difference in light intensity between the second region 200B and the first region 200A.

[0049] Among them, when the height of the protrusion 20 in a certain group is reduced to z, the height of the protrusion 20 stops being reduced. Here, z can be regarded as the minimum height of the protrusion 20 in the light guide plate 200 that meets the focusing needs. When the height of the protrusion 20 is lower than z, the protrusion 20 is relatively flat and the focusing effect is not good. Or the height z is the minimum height limit of the protrusion 20 set in the display module AA due to the need for the backlight source. The above-mentioned setting is conducive to ensuring the enhancement of the focusing effect in the second area 200B of the light guide plate 200, improving the uniformity of the light output of the light guide plate 200, and ensuring that different areas of the light guide plate 200 have a focusing effect that can meet basic needs, avoiding the situation where some areas have poor focusing and produce dark areas.

[0050] In one implementation of the above embodiment, optionally, as Figure 7 、 Figure 8 As shown, in the multiple groups of raised portions 20 arranged in the direction from the side away from the first region 200A to the side closer to the first region 200A within the second region 200B, when the height of the raised portions 20 is reduced group by group, if the height of the raised portions 20 in a certain group is set to z, the height of the raised portions 20 in the following groups will not be reduced any further, and the height of the raised portions 20 in the remaining groups can all be set to z. For example, a first group of raised portions 201 is formed by a plurality of raised portions 20 within a distance x from the side away from the first region 200A in the second region 200B. The height of the raised portions 201 in the first group is set based on the required light concentration intensity compensation in the area where the raised portions 201 are located. For example, if the height of the raised portions 20 in the first group 201 is set to M, the height of the raised portions 20 in the second group 202 is set to My, and so on. If the height Mn*y of the protrusions 20 in the nth group of protrusions 20n is less than or equal to z, the height of the protrusions 20 in the nth group of protrusions 20n is set to z, and the heights of the protrusions 20 in subsequent groups are still set to z. Of course, in some other embodiments, if the nth group of protrusions 20n is the last group of protrusions divided into groups at a distance x in the second region 200B, and the height of the protrusions 20 in the nth group of protrusions 20n is Mn*y>z, the heights of the multiple protrusions 20 in the first region 200A may also be set to Mn*y.

[0051] In another implementation of the above embodiment, optionally, as Figure 9 、 Figure 10As shown, in the multiple groups arranged in the direction from the side close to the first area 200A to the side away from the first area 200A in the second area 200B, when the heights of the protrusions 20 are increased group by group, taking the height of the protrusions 20 in the first area 200A as z as an example, multiple protrusions 20 within a distance x from the side of the second area 200B close to the first area 200A constitute a first group of protrusions 201, then the height of the protrusions 20 in the first group of protrusions 201 is set to z+y, then the height of the protrusions 20 in the second group of protrusions 202 is z+2y, the height of the protrusions 20 in the third group of protrusions 203 is z+3y, ..., the height of the protrusions 20 in the nth group of protrusions 20n is z+n*y. Of course, if the height of the protrusions 20 in the nth group of protrusions 20n exceeds the maximum height limit of the protrusions 20 after adding y, the heights of the protrusions 20 in the nth group of protrusions 20n and subsequent groups can be set to be equal and no longer increase.

[0052] It should be noted that, if Figure 7-10 In the implementation method of the embodiment of the present application shown, if the distance x is used to divide the protrusion groups, if there is a protrusion 20 corresponding to the distance x that will occupy the group space of two adjacent groups during preparation, optionally, the height of the protrusion 20 is set to be equal to the height of the protrusion 20 in the previous group of the two adjacent groups.

[0053] In one embodiment of the present application, the parameter ranges of x, y, and z that can be set are 0<x≤2mm, 0.2μm≤y≤0.5μm, and 0.3μm≤z≤0.7μm. The height of the protrusions 20 in the first area 200A and the second area 200B is set in combination with the above parameter ranges, which is conducive to making the height change of the protrusions 20, such as the decline, more gentle when the height change occurs between multiple adjacent protrusions 20, which is conducive to avoiding a large step difference between two adjacent protrusions 20, resulting in a significant difference in light intensity between the two adjacent protrusions 20, resulting in uneven brightness of the light output of the light guide plate 200, and the risk of poor light output effect.

[0054] Furthermore, the above parameter ranges are helpful in providing a reference for relevant technical personnel, improving the feasibility of the embodiments of the present application, and improving the use effect of the embodiments of the present application.

[0055] In one embodiment of the present application, the extension width of the second area 200B of the light guide plate 200 in the first direction X1 is set to w1, 10mm≤w1≤30mm. The second area 200B in this range is more susceptible to uneven light intensity. The method of increasing the height of the protrusion 20 proposed in the embodiment of the present application is applied in the range of 10mm-30mm from the edge of the light guide plate 200 in the first direction X1, which can effectively increase the light intensity in the second area 200B and adjust the light output uniformity of the light guide plate 200.

[0056] Figure 11 Another embodiment of the present application provides Figure 5 Schematic diagram of the cross section along the BB' direction.

[0057] In one embodiment of the present application, Figure 5 、 Figure 11 As shown, at least in the second area 200B, the distance D1 between the centers O1 of two adjacent protrusions 20 gradually increases in the direction from close to the first area 200A to away from the first area 200A. In the embodiment of the present application, the heights of the plurality of protrusions 20 arranged in the second area 200B from close to the first area 200A to away from the first area 200A in the third direction X3 are gradually increased, and are all greater than the height of the protrusions 20 in the first area 200A in the third direction X3. As the height of the protrusions 20 increases, the distance D1 between the centers O1 of the two adjacent protrusions 20 gradually increases in the direction from close to the first area 200A to away from the first area 200A. Figure 11 From the perspective of the raised portion 20 having an arched cross section, it also means that the bottom side of the raised portion 20 is getting larger and larger, so that the distance D1 between the centers O1 of two adjacent raised portions 20 is gradually increased.

[0058] In one embodiment of the present application, continue to refer to Figures 1-11 As shown, the cross-sectional shape of the raised portion 20 in the third direction X3 is one of an isosceles triangle, an isosceles trapezoid, a semicircle, and an arch. The raised portions 20 of the above shapes are all narrow in the third direction X3 and wide in the bottom, which is conducive to achieving the light gathering effect of the raised portion 20 when the light passes from the bottom of the light guide plate 200 to the raised portion 20.

[0059] In one embodiment of the present application, the width of the surface of the protrusion 20 away from the display panel 100 in the first direction X1 is 0.02 mm to 0.06 mm. The surface of the protrusion 20 away from the display panel 100 is the light incident surface for light from the light guide plate 200 entering the protrusion 20. The light entering the protrusion 20 from the side of the protrusion 20 away from the display panel 100 is the light that needs to be focused by the protrusion 20.

[0060] In the embodiment of the present application, the width of the surface of the protrusion 20 away from the display panel 100 in the first direction X1 is limited to a certain range. This can constrain the surface area of ​​the protrusion 20 away from the display panel 100 to a certain extent, so that the amount of light that can enter a protrusion 20 is within a reasonable range, thereby ensuring that the amount of light that can be processed by the protrusion 20 is within a reasonable range. This helps to avoid the situation where the width of the surface of the protrusion 20 away from the display panel 100 in the first direction X is too small, resulting in the protrusion 20 being too small or elongated, causing poor light focusing effect or low light processing efficiency. It also helps to avoid the situation where the width of the surface of the protrusion 20 away from the display panel 100 in the first direction X is too large, resulting in the protrusion 20 being too large, causing a large amount of light to enter the same protrusion 20 and be concentrated. This can easily result in a significant dark area between two adjacent protrusions 20, which is not conducive to improving the uniformity of light output from the light guide plate 200.

[0061] Figure 12 This is a schematic diagram of preparing a protrusion provided in an embodiment of the present application. Figure 13 A comparative schematic diagram of a protrusion provided in an embodiment of the present application.

[0062] In one embodiment of the present application, Figure 12 As shown, in step S1, a diamond bit 30 is first used to carve a groove 50 on the surface of the first mold 40. The shape of the groove 50 is the shape of the raised portion 20 that needs to be prepared later. Here, taking the shape of the raised portion 20 to be prepared as a trapezoid as an example, the diamond bit 30 used is also trapezoidal. When preparing the groove 50, it is necessary to consider the size of the raised portion 20 that needs to be prepared. In addition to the height of the raised portion 20 and the width range of the surface away from the display panel 100 in the first direction X1 proposed in the above embodiments, it is also proposed in the embodiment of the present application that the angle between the side walls 20A of the two adjacent raised portions 20 prepared in the first direction X1 is a, 90°≤a≤150°. In this way, the angle between the side walls of the two adjacent trapezoidal grooves 50 carved in step S1 is also a.

[0063] Furthermore, in step S2, the side of the first mold 40 including the groove 50 is pressed onto the surface of the material for preparing the light guide plate 200, so that the surface of the prepared light guide plate 200 includes the protrusions 20 formed by the grooves 50. The angle between the side walls 20A of two adjacent protrusions 20 is a, which is conducive to ensuring that the side walls 20A have a certain inclination and the light-collecting effect of the protrusions 20. In addition, combined with Figure 13In the case where the angle is too small as shown in Figure (a), setting the angle a to be at least 90° can help avoid the situation where the angle is too small, resulting in a narrow gap between the side walls 20A of two adjacent protrusions 20. This can easily cause light diffraction between the two adjacent side walls 20A, resulting in the risk of bright or dark stripes appearing between the two side walls 20A. Figure 13 Regarding the case where the angle represented by (b) is too large, setting the angle to be at most less than or equal to 150° is beneficial to avoid the situation where the angle a is too large, resulting in the connection between the side walls 20A of two adjacent protrusions 20 being too flat, making it easy for light emitted from this position to not be focused or to be scattered to other positions. In summary, setting the angle a between two adjacent protrusions 20 in the first direction X1 within the range of 90°≤a≤150° is beneficial to improving the focusing effect of the protrusions 20, and is beneficial to improving the uniformity of light output from the light guide plate 200, thereby improving the display uniformity of the display panel 100.

[0064] Figure 14 A schematic diagram of a display device provided in an embodiment of the present application.

[0065] The embodiment of the present application provides a display device 400, such as Figure 14 As shown, the display device 400 includes the display module AA proposed in any of the above embodiments. Optionally, the display device 400 includes a device for display such as a computer, a mobile phone, or a television.

[0066] In the display device 400, the heights of the multiple raised portions 20 along the third direction X3 are unequal, with the third direction X3 being perpendicular to the plane of the display module AA. The light-collecting effect of the raised portions 20 is related to their height in the third direction X3: the higher the height of the raised portions 20, the stronger the light-collecting effect, and vice versa. By setting the multiple raised portions 20 on the same light guide plate 200 to have unequal heights, the raised portions 20 in different regions can be targeted with different heights. For example, for regions of the light guide plate 200 with weaker light output intensity, the height of the raised portions 20 in those regions can be adaptively increased, thereby enhancing the light-collecting effect of the raised portions 20 in those regions. This, in turn, reduces the difference in light output intensity between different regions of the light guide plate 200 and improves the uniformity of light output intensity across the entire surface of the light guide plate 200. This allows the entire surface of the display panel 100 to receive a more uniform light intensity, improving the display uniformity and other display effects of the display panel 100.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display module, characterized in that: include: Display panel; A light guide plate, the light guide plate being located on one side of the backlight surface of the display panel; the surface of the light guide plate facing the display panel being a first surface, the first surface comprising raised portions arranged along a first direction and extending along a second direction; the first direction and the second direction intersecting and both being parallel to the plane where the display module is located; The heights of the plurality of protrusions along a third direction are not completely equal, and the third direction is a direction perpendicular to the plane where the display module is located.

2. The display module according to claim 1, wherein: The display module further includes a plurality of light-emitting elements, which are arranged on one side of the light incident surface of the light guide plate, and the light incident surface of the light guide plate extends along the first direction.

3. The display module according to claim 1, wherein: The light guide plate includes a first area and a second area distributed along the first direction, and the first area is located between the two second areas; The height of at least part of the protrusions in the second area in the third direction is greater than the height of the protrusions in the first area in the third direction.

4. The display module according to claim 3, wherein: In the second region, the height of the protrusion in the third direction gradually decreases from a side away from the first region to a side close to the first region.

5. The display module according to claim 4, wherein: The heights of the plurality of protrusions in the first region are equal, and are equal to the height of the smallest protrusion in the second region.

6. The display module according to claim 3, wherein: The height of the largest protrusion located in the second region is 5-20 times the height of the smallest protrusion located in the first region.

7. The display module according to claim 4, wherein: In the second region, from the side away from the first region to the side close to the first region, the plurality of protrusions within each distance x are grouped together, the heights of the plurality of protrusions in the same group are equal, and the heights of the protrusions in two adjacent groups decrease group by group along the length y; When the height of the protrusions in a certain group is reduced to z, the reduction of the height of the protrusions is stopped.

8. The display module according to claim 7, wherein: 0<x≤2mm, 0.2μm≤y≤0.5μm, 0.3μm≤z≤0.7μm.

9. The display module according to claim 7, wherein: An extension width of the second region in the first direction is w1, 10 mm ≤ w1 ≤ 30 mm.

10. The display module according to claim 3, wherein: At least in the second region, the distance between the centers of two adjacent protrusions gradually increases in a direction from approaching the first region to moving away from the first region.

11. The display module according to claim 1, wherein: The cross-sectional shape of the protrusion in the third direction is one of an isosceles triangle, an isosceles trapezoid, a semicircle, and an arcuate shape.

12. The display module according to claim 10, wherein: The width of the surface of the protrusion away from the display panel in the first direction is 0.02 mm to 0.06 mm.

13. The display module according to claim 1, wherein: The included angle between the side walls of two adjacent protrusions in the first direction is a, and 90°≤a≤150°.

14. A display device, characterized in that: Comprising the display module according to any one of claims 1-13.

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