Backlight module, display module and display device

Abstract

The present invention discloses a backlight module, a display module and a display device, relating to the technical field of displays; the backlight module includes a light-emitting area; the light-emitting area includes a first light-emitting area, a second light-emitting area and a third light-emitting area, and along a first direction, the third light-emitting area is located between the first light-emitting area and the second light-emitting area; it further includes a substrate, and the substrate protrudes on the side of the third light-emitting area facing the light-emitting surface of the backlight module to form a protruding portion, and the protruding portion includes a first side wall facing the first light-emitting area and a second side wall facing the second light-emitting area; it further includes a light-emitting element located on the side of the substrate facing the light-emitting surface of the backlight module, and the light-emitting element includes a first light-emitting element, and the first light-emitting element is located on the first side wall and / or the second side wall; so that the light-emitting elements arranged adjacent to the first light-emitting area and / or the second light-emitting area in the third light-emitting area can emit light towards the inside of the corresponding light-emitting area, so as to avoid the problem of light crosstalk between the light-emitting elements arranged on the first side wall and the second side wall, and improve the display quality.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more specifically, to a backlight module, a display module, and a display device. Background Art

[0002] In the prior art, there are some display devices that use LEDs (light-emitting diodes) as light-emitting elements. LEDs are mainly used in zonal control. When the zonal-controlled LEDs display an image, they have the advantages of high contrast and good display effect. However, there will be halos, resulting in unclear boundaries between the images in different display areas, affecting the display quality of the display device. Summary of the Invention

[0003] In view of this, the present invention provides a backlight module, a display module, and a display device to solve the problem of unclear boundaries between display images and improve the display quality.

[0004] In a first aspect, the present invention provides a backlight module, including a light-emitting area;

[0005] The light-emitting area at least includes a first light-emitting area, a second light-emitting area, and a third light-emitting area. Along a first direction, the third light-emitting area is located between the first light-emitting area and the second light-emitting area, and the first light-emitting area, the third light-emitting area, and the second light-emitting area are adjacent to each other in pairs;

[0006] It further includes a substrate, and the substrate protrudes to form a protruding portion on the side of the third light-emitting area facing the light-out surface of the backlight module. The protruding portion at least includes a first side wall facing the first light-emitting area and a second side wall facing the second light-emitting area;

[0007] It further includes a plurality of light-emitting elements located on the side of the substrate facing the light-out surface of the backlight module. The light-emitting elements include a first light-emitting element, and the first light-emitting element is located on the first side wall and / or the second side wall.

[0008] In a second aspect, the present invention provides a display module, including the backlight module as described above;

[0009] The display module includes a display area, and the display area includes a first display area and a second display area adjacent to each other along the first direction. The first display area includes a first light-emitting area and a third light-emitting area provided with a first side wall, and the second display area includes a second light-emitting area and a third light-emitting area provided with a second side wall;

[0010] The backlight module includes a plurality of light-emitting elements located on the side of the substrate facing the light-out surface of the backlight module;

[0011] It further includes a support frame, and the support frame is located on the side of the substrate away from the light-emitting elements;

[0012] The support frame includes a protruding member, and the protruding member is embedded in the protruding portion.

[0013] In a third aspect, the present invention provides a display device, and the display device includes the display module.

[0014] Compared with the prior art, the backlight module, the display module and the display device provided by the present invention at least achieve the following beneficial effects:

[0015] This application provides a backlight module, a display module and a display device. The light-emitting area of the backlight module at least includes a first light-emitting area, a third light-emitting area, and a second light-emitting area that are adjacent to each other in pairs. By providing that the substrate corresponding to the third light-emitting area located between the first light-emitting area and the second light-emitting area includes a protruding portion that protrudes toward the light-emitting surface side of the backlight module, the protruding portion includes a first side wall facing the first light-emitting area and a second side wall facing the second light-emitting area, and at least one of the first side wall and the second side wall is provided with a first light-emitting element that emits light toward the first light-emitting area and the second light-emitting area, so that the light-emitting elements disposed adjacent to the first light-emitting area and / or the second light-emitting area in the third light-emitting area can emit light toward the inside of the corresponding light-emitting area, so as to avoid the problem of light crosstalk between the light-emitting elements disposed on the first side wall and the second side wall, so that the display boundary between the first light-emitting area and the third light-emitting area provided with the first side wall, and the third light-emitting area provided with the second side wall and the second light-emitting area is clearer, and the display quality is improved.

[0016] Of course, it is not necessary for any product implementing the present invention to achieve all the above-described technical effects simultaneously.

[0017] Through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear. Description of the Drawings

[0018] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0019] Figure 1 Shown is a schematic diagram of a backlight module provided by an embodiment of the present application;

[0020] Figure 2 Shown is provided by an embodiment of the present application Figure 1 A cross-sectional view of AA' therein;

[0021] Figure 3 Shown is provided by an embodiment of the present application Figure 1 An enlarged schematic diagram of area B therein;

[0022] Figure 4As shown, it is an enlarged view of the third light-emitting region provided in the embodiment of the present application; Figure 2

[0023] Figure 5 As shown, it is another cross-sectional view of AA' in the embodiment of the present application; Figure 1

[0024] Figure 6 As shown, it is a schematic diagram of the substrate in the AA' cross-sectional view in the embodiment of the present application; Figure 1

[0025] Figure 7 As shown, it is another schematic diagram of the substrate in the AA' cross-sectional view in the embodiment of the present application; Figure 1

[0026] Figure 8 As shown, it is another schematic diagram of the substrate in the AA' cross-sectional view in the embodiment of the present application; Figure 1

[0027] Figure 9 As shown, it is a top view of the boundary line provided in the embodiment of the present application;

[0028] Figure 10 As shown, it is another top view of the boundary line provided in the embodiment of the present application;

[0029] Figure 11 As shown, it is another top view of the boundary line provided in the embodiment of the present application;

[0030] Figure 12 As shown, it is another top view of the boundary line provided in the embodiment of the present application;

[0031] Figure 13 As shown, it is another top view of the boundary line provided in the embodiment of the present application;

[0032] Figure 14 As shown, it is a schematic diagram of a display module provided in the embodiment of the present application;

[0033] Figure 15 As shown, it is an enlarged schematic diagram of region C provided in the embodiment of the present application; Figure 14

[0034] Figure 16 As shown, it is a cross-sectional schematic diagram of DD' provided in the embodiment of the present application; Figure 14

[0035] Figure 17 As shown, it is a schematic diagram of a display device provided in the embodiment of the present application. Detailed implementation manners

[0036] ​​​​​​​The various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.

[0037] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present invention or its application or use.

[0038] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification.

[0039] In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0040] Without departing from the spirit or scope of the present invention, various modifications and variations can be made to the present invention, which will be apparent to those skilled in the art. Thus, the present invention is intended to cover modifications and variations of the present invention that fall within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided by the embodiments of the present invention can be combined with each other without conflict.

[0041] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0042] When the LEDs in the display device adopt zonal control, the brightness and darkness of the backlight depend on the display screen. When the display screen includes black and other colors, the LEDs corresponding to the areas displaying white or color patterns are turned on, and the LEDs corresponding to the black areas are turned off. Such a setting can save power consumption and also improve the contrast of the display screen; however, there will be halos in the light emitted by the LEDs, and there is a problem of crosstalk where the light irradiates the black display areas, resulting in unclear picture boundaries between the areas displaying white or color patterns and the black display areas, affecting the display quality of the display device.

[0043] In view of this, the present invention provides a backlight module, a display module, and a display device to solve the problem of unclear boundaries between display screens and improve the display quality.

[0044] Figure 1 Shown is a schematic diagram of a backlight module provided by an embodiment of the present application. Figure 2 Shown is provided by an embodiment of the present application Figure 1 A cross-sectional view of AA' inFigure 3 As shown in the following, it is an enlarged schematic diagram of area B in Figure 1 provided by an embodiment of the present application. Please refer to Figures 1 - 3 , the present application provides a backlight module 100, which includes a light-emitting area 10;

[0045] The light-emitting area 10 at least includes a first light-emitting area 11, a second light-emitting area 12, and a third light-emitting area 13. Along the first direction X, the third light-emitting area 13 is located between the first light-emitting area 11 and the second light-emitting area 12, and the first light-emitting area 11, the third light-emitting area 13, and the second light-emitting area 12 are arranged adjacent to each other in pairs;

[0046] It further includes a substrate 30. The substrate 30 protrudes to form a protruding portion 38 on the side of the third light-emitting area 13 facing the light-emitting surface of the backlight module 100. The protruding portion 38 at least includes a first side wall 31 facing the first light-emitting area 11 and a second side wall 32 facing the second light-emitting area 12;

[0047] It further includes a plurality of light-emitting elements 20 located on the side of the substrate 30 facing the light-emitting surface of the backlight module 100. The light-emitting elements 20 include a first light-emitting element 21, and the first light-emitting element 21 is located on the first side wall 31 and / or the second side wall 32.

[0048] Specifically, the present application provides a backlight module 100. The backlight module 100 includes a light-emitting area 10. The light-emitting area 10 at least includes a first light-emitting area 71 and a second light-emitting area 72 arranged adjacent to each other. For the purpose of clearly illustrating the embodiments of the present application, the first light-emitting area 71 and the second light-emitting area 72 including the first light-emitting area 11, the third light-emitting area 13, and the second light-emitting area 12 arranged adjacent to each other are taken as an example for illustration. Among them, the third light-emitting area 13 is located between the first light-emitting area 11 and the second light-emitting area 12. The first light-emitting area 11, the second light-emitting area 12, and the third light-emitting area 13 here can all be provided with light-emitting elements 20 to realize the display function of the corresponding area when needed. The backlight module 100 includes a substrate 30 and light-emitting elements 20 arranged on the side of the substrate 30 facing the light-emitting surface of the backlight module 100. Based on the first light-emitting area 11, the third light-emitting area 13, and the second light-emitting area 12 arranged adjacent to each other in pairs along the first direction X, it can be selectively set that the substrate 30 includes a protruding portion 38 protruding on the side of the third light-emitting area 13 facing the light-emitting surface of the backlight module 100. This protruding portion 38 at least includes a first side wall 31 and a second side wall 32. Among them, the first side wall 31 faces the first light-emitting area 11, the extending direction of the plane where the first side wall 31 is located intersects with the first direction X, the second side wall 32 faces the second light-emitting area 12, and the extending direction of the plane where the second side wall 32 is located also intersects with the first direction X; Further, the light-emitting element 20 includes a first light-emitting element 21. Here, the first light-emitting element 21 can be arranged on the first side wall 31 and / or the second side wall 32, such as Figure 2As shown, the light-emitting surface of the first light-emitting element 21 on the side far from its corresponding first side wall 31 or second side wall 32 can be set to be parallel to the plane where the corresponding first side wall 31 or second side wall 32 is located, so that the first light-emitting element 21 provided on the first side wall 31 has a light-emitting surface facing the first light-emitting area 11, and the first light-emitting element 21 provided on the second side wall 32 has a light-emitting surface facing the second light-emitting area 12; wherein, the first light-emitting area 71 specifically includes the first light-emitting area 11 and the third light-emitting area 13 provided on the first side wall 31, and the second light-emitting area 72 specifically includes the second light-emitting area 12 and the third light-emitting area 13 provided on the second side wall 32. With such a setting, taking the boundary line L between the first side wall 31 and the second side wall 32 in the third light-emitting area 13 as the dividing line, when the light-emitting element 20 in the first light-emitting area 71 emits light and the light-emitting element 20 in the second light-emitting area 72 does not emit light, the halo existing in the light emitted by the light-emitting element 20 in the first light-emitting area 11 will only extend to the area where the first side wall 31 is located in the direction facing the second light-emitting area 12 and will not exceed the boundary line L between the first side wall 31 and the second side wall 32. And the main light-emitting surface of the first light-emitting element 21 on the first side wall 31 is facing the first light-emitting area 11, so the halo existing in the light emitted by the first light-emitting element 21 will not exceed the boundary line L between the first side wall 31 and the second side wall 32 either, so that the light emitted by the light-emitting element 20 in the first light-emitting area 71 will not cause light crosstalk to the second light-emitting area 72, making the boundary of the displayed images in the first light-emitting area 71 and the second light-emitting area 72 on both sides of the boundary line L clearer.

[0049] Here is a specific embodiment. For example, when the first light-emitting area 11 and the area where the first side wall 31 is located (the first light-emitting area 71) display white or color, and the second light-emitting area 12 and the area where the second side wall 32 is located (the second light-emitting area 72) display black, the light-emitting element 20 correspondingly provided in the area where the second light-emitting area 12 and the second side wall 32 are located can be in a closed state, and the light emitted by the light-emitting element 20 in the area where the first light-emitting area 11 and the first side wall 31 are located will not irradiate to the area where the second light-emitting area 12 and the second side wall 32 are located, avoiding light crosstalk of the light-emitting element 20 in the area displaying white or color to the area displaying black, so as to make the display boundary of the images on both sides of the boundary line L in the first direction X clearer, improving the image display effect of the corresponding display panel and enhancing the user experience.

[0050] It should be noted that the above-mentioned "boundary line L" is a virtual line and does not actually exist, and is only used to clearly illustrate the beneficial effects related to the setting of the first side wall 31, the second side wall 32 and the light-emitting element 20 thereon in this application.

[0051] Figure 4 The following shows what is provided by the embodiment of this application Figure 2An enlarged view of the third light-emitting region in the figure, please refer to Figures 1 - 4 Optionally, the first light-emitting element 21 located on the first sidewall 31 is the first sub-light-emitting element 211, and the first light-emitting element 21 located on the second sidewall 32 is the second sub-light-emitting element 212;

[0052] In a direction perpendicular to the plane where the first sidewall 31 is located, the first sub-light-emitting element 211 includes a first sub-light-emitting surface 41 on a side away from the first sidewall 31, and the first sub-light-emitting surface 41 faces the first light-emitting region 11.

[0053] In a direction perpendicular to the plane where the second sidewall 32 is located, the second sub-light-emitting element 212 includes a second sub-light-emitting surface 42 on a side away from the second sidewall 32, and the second sub-light-emitting surface 42 faces the second light-emitting region 12.

[0054] Specifically, for the purpose of clearly illustrating the embodiments of the present application, the first light-emitting element 21 provided on the first sidewall 31 is taken as the first sub-light-emitting element 211, and the first light-emitting element 21 provided on the second sidewall 32 is taken as the second sub-light-emitting element 212 for description; an alternative embodiment provided by the present application is that, in a direction perpendicular to the plane where the first sidewall 31 is located, there is a first sub-light-emitting surface 41 among the light-emitting surfaces included in the first sub-light-emitting element 211, and the light-emitting direction of the first sub-light-emitting surface 41 faces the first light-emitting region 11. With such a setting, part of the light emitted by the first sub-light-emitting element 211 during operation can be emitted towards the first light-emitting region 11, so that the halo existing in the light emitted by the first sub-light-emitting element 211 does not exceed the boundary line L between the first sidewall 31 and the second sidewall 32, and the light emitted by the first sub-light-emitting element 211 does not cause light crosstalk to the region where the second sidewall 32 and the second light-emitting region 12 are located, thereby making the boundary of the pictures displayed on both sides of the boundary line L clearer; similarly, in a direction perpendicular to the plane where the second sidewall 32 is located, there is a second sub-light-emitting surface 42 among the light-emitting surfaces included in the second sub-light-emitting element 212, and the light-emitting direction of the second sub-light-emitting surface 42 faces the second light-emitting region 12. With such a setting, part of the light emitted by the second sub-light-emitting element 212 during operation can be emitted towards the second light-emitting region 12, so that the halo existing in the light emitted by the second sub-light-emitting element 212 does not exceed the boundary line L between the first sidewall 31 and the second sidewall 32, and the light emitted by the second sub-light-emitting element 212 does not cause light crosstalk to the region where the first sidewall 31 and the first light-emitting region 11 are located, thereby making the boundary of the pictures displayed on both sides of the boundary line L clearer.

[0055] It should be added that the present application does not limit the number of light-emitting surfaces of the first light-emitting element 21. That is, the first sub-light-emitting element 211 at least includes a first sub-light-emitting surface 41 on the side away from the first side wall 31 in a direction perpendicular to the plane where the first side wall 31 is located, and the first sub-light-emitting surface 41 faces the first light-emitting area 11; the second sub-light-emitting element 212 at least includes a second sub-light-emitting surface 42 on the side away from the second side wall 32 in a direction perpendicular to the plane where the second side wall 32 is located, and the second sub-light-emitting surface 42 faces the second light-emitting area 12. With such a setting, the light emitted when the first sub-light-emitting element 211 works can be emitted toward the first light-emitting area 11, and the light emitted when the second sub-light-emitting element 212 works can be emitted toward the second light-emitting area 12, so that the light emitted by the first sub-light-emitting element 211 and the light-emitting element 20 located in the first light-emitting area 11 are in the area where the first light-emitting area 11 and the first side wall 31 are located, avoiding light crosstalk to the area where the second side wall 32 and the second light-emitting area 12 are located, so as to achieve clear boundaries between the pictures and improve the display quality of the pictures.

[0056] It should be further added that on the basis that the first sub-light-emitting element 211 includes the first sub-light-emitting surface 41, the plane where the first sub-light-emitting surface 41 is located can be further set to be parallel to the plane where the first side wall 31 is located, and the first sub-light-emitting element 211 can also be further set to include other light-emitting surfaces. Even if the first sub-light-emitting element 211 also includes other light-emitting surfaces, since the first side wall 31 faces the first light-emitting area 11, the light emitted from other surfaces of the first sub-light-emitting element 211 will not be emitted in a large amount toward the side of the first side wall 31 away from the first light-emitting area 11, avoiding obvious crosstalk of the light emitted when the first sub-light-emitting element 211 works to the area where the second side wall 32 and the second light-emitting area 12 are located, so as to improve the clarity of the boundaries between the display pictures and also avoid obvious interference between the area of the display picture and the area adjacent to it but not displaying the picture. Similarly, on the basis that the second sub-light-emitting element 212 includes the second sub-light-emitting surface 42, the plane where the second sub-light-emitting surface 42 is located can be further set to be parallel to the plane where the second side wall 32 is located, and the second sub-light-emitting element 212 can also be further set to include other light-emitting surfaces.

[0057] In addition, as Figure 2 、 Figure 4 The first light-emitting element shown is a form of a light-emitting element commonly used in the prior art. Users can select the relevant specifications of a suitable light-emitting element in order to ensure the clarity of the boundaries between the display pictures. The present application does not make specific limitations on this. For example, a light-emitting element with a curved light-emitting surface can also be selected, or a light-emitting element in which the light-emitting surface adjacent to the light-emitting surface of the backlight module in the first sub-light-emitting element does not emit light can be selected, etc.

[0058] Please refer toFigures 1 - 3 , optionally, the substrate 30 located in the first light-emitting region 11 and the second light-emitting region 12 is a flat portion 39, and the plane where the flat portion 39 is located is parallel to the light-emitting surface of the backlight module 100;

[0059] The light-emitting element 20 further includes a second light-emitting element 22, and the second light-emitting element 22 is located on the flat portion 39;

[0060] The first light-emitting element 21 and the second light-emitting element 22 have the same structure.

[0061] Specifically, an alternative embodiment provided by the present application is that, in addition to the above-mentioned convex portion 38 formed by the substrate 30 in the third light-emitting region 13 protruding toward the light-emitting surface of the backlight module 100, the substrate 30 may further include a flat portion 39 located in the first light-emitting region 11 and the second light-emitting region 12, and the extending direction of the plane where the substrate 30 of the flat portion 39 is located is parallel to the light-emitting surface of the backlight module 100; the light-emitting element 20 located on the side of the substrate 30 facing the light-emitting surface of the backlight module 100 further includes a second light-emitting element 22, and the second light-emitting elements 22 are all arranged on the flat portion 39, that is, the second light-emitting elements 22 are arranged in the first light-emitting region 11 and the second light-emitting region 12; the present application proposes that the first light-emitting element 21 and the second light-emitting element 22 that can be selectively arranged in the same backlight module 100 have the same structure, that is, the first light-emitting element 21 and the second light-emitting element 22 can select light-emitting element 20 products of the same specification. In this way, it is avoided that different specifications of light-emitting elements 20 need to be connected and fixed to the substrate 30 in different ways, reducing the manufacturing cost of the backlight module 100, and the display effects of light-emitting elements 20 of the same specification are the same, which can also improve the light-emitting uniformity of the backlight module 100.

[0062] It should be noted that the present application is not limited thereto, and the structures of the first light-emitting element 21 and the second light-emitting element 22 can also be selected according to requirements; for example, the second light-emitting element 22 is selected as a cuboid, and the second light-emitting element 22 emits light from 5 sides, and only the side in contact with the substrate 30 does not emit light; the first light-emitting element 21 can also be selected as a cuboid, and the first light-emitting element 21 emits light from 4 sides, and the side in contact with the substrate 30 does not emit light and the side adjacent to the light-emitting surface of the backlight module 100 does not emit light.

[0063] Please continue to refer to Figures 1 - 3 , optionally, the substrate 30 located in the first light-emitting region 11 and the second light-emitting region 12 is a flat portion 39, and the plane where the flat portion 39 is located is parallel to the light-emitting surface of the backlight module 100;

[0064] The light-emitting element 20 further includes a second light-emitting element 22, and the second light-emitting element 22 is located on the flat portion 39;

[0065] In the thickness direction of the backlight module 100, the distance between the convex portion 38 on the side facing the light-emitting surface of the backlight module 100 and the side away from the light-emitting surface of the backlight module 100 is H; in the first direction X, the distance between the centers of two adjacent second light-emitting elements 22 disposed in the first light-emitting area 11 or the second light-emitting area 12 is S, and H ≤ S.

[0066] Specifically, an alternative embodiment provided by the present application is that in addition to the convex portion 38 formed by the substrate 30 protruding on the side facing the light-emitting surface of the backlight module 100 in the third light-emitting area 13 as described above, the substrate 30 may further include a flat portion 39 in the first light-emitting area 11 and the second light-emitting area 12. The extending direction of the plane where the substrate 30 of the flat portion 39 is located is parallel to the light-emitting surface of the backlight module 100; the light-emitting elements 20 on the side of the substrate 30 facing the light-emitting surface of the backlight module 100 further include second light-emitting elements 22, and the second light-emitting elements 22 are all disposed on the flat portion 39, that is, the second light-emitting elements 22 are disposed in the first light-emitting area 11 and the second light-emitting area 12; the present application proposes that in the thickness direction of the backlight module 100, the distance H between the convex portion 38 formed by the substrate 30 in the third light-emitting area 13 on the side facing the light-emitting surface of the backlight module 100 and the side away from the light-emitting surface of the backlight module 100 may be selected to be equal to the distance S between the centers of two adjacent second light-emitting elements 22 disposed in the first light-emitting area 11 or the second light-emitting area 12, or the distance H between the convex portion 38 formed by the substrate 30 in the third light-emitting area 13 on the side facing the light-emitting surface of the backlight module 100 and the side away from the light-emitting surface of the backlight module 100 may be selected to be less than the distance S between the centers of two adjacent second light-emitting elements 22 disposed in the first light-emitting area 11 or the second light-emitting area 12, so as to prevent the height of the convex portion 38 from being too large, resulting in the first light-emitting element 21 disposed on the corresponding first side wall 31 and / or the second side wall 32 being too far away from the substrate 30 of the flat portion 39, so as to ensure that the distances between the light-emitting elements 20 are as similar as possible, avoid the problem of light-emitting dark areas caused by too long a light propagation distance, and at the same time, it can also avoid the problem that the thickness of the backlight module 100 is too large due to the too large height of the convex portion 38, meeting the requirements of the thin design of the corresponding display device.

[0067] Please continue to refer to Figures 1 - 3 Optionally, in the thickness direction of the backlight module 100, the distance between the first light-emitting element 21 on the side facing the light-emitting surface of the backlight module 100 and the side of the convex portion 38 away from the light-emitting surface of the backlight module 100 is H1, and H > H1.

[0068] Specifically, the present application also provides an alternative implementation. Along the thickness direction of the backlight module 100, the distance H between the convex portion 38 formed by the substrate 30 in the third light-emitting region 13 on the side facing the light-emitting surface of the backlight module 100 and the side away from the light-emitting surface of the backlight module 100 is greater than the distance H1 between the first light-emitting element 21 on the side facing the light-emitting surface of the backlight module 100 and the side of the convex portion 38 away from the light-emitting surface of the backlight module 100, so that the side of the first light-emitting element 21 disposed on the first sidewall 31 and / or the second sidewall 32 facing the light-emitting surface of the backlight module 100 does not exceed the height of the convex portion 38 on the side facing the light-emitting surface of the backlight module 100, thereby avoiding the contact between other film layer structures required to be disposed on the side of the light-emitting element 20 of the backlight module 100 away from the substrate 30 and the first light-emitting element 21 during assembly, thus avoiding damage to the first light-emitting element 21 during the assembly process and improving the manufacturing yield of the backlight module 100; and at the same time, it can avoid damage to the first light-emitting element 21 caused by the sinking of other film layer structures required to be disposed on the side of the light-emitting element 20 away from the substrate 30 towards the substrate 30 during the use of the backlight module 100, improving the use yield of the backlight module 100, and thus improving the use yield of the corresponding display device.

[0069] Figure 5 Another cross-sectional view of AA' in the embodiment provided by the present application is shown. Please refer to Figure 1 、 Figure 1 、 Figure 2 、 Figure 3 and Figure 5 . Optionally, the substrate 30 in the first light-emitting region 11 and the second light-emitting region 12 is a flat portion 39, and the plane where the flat portion 39 is located is parallel to the light-emitting surface of the backlight module 100.

[0070] The light-emitting element 20 further includes a second light-emitting element 22, and the second light-emitting element 22 is located on the flat portion 39.

[0071] Along the first direction X, the distance between two adjacent second light-emitting elements 22 disposed in the first light-emitting region 11 or the second light-emitting region 12 is S, the angle between the first sidewall 31 facing the second sidewall 32 and the plane where the flat portion 39 is located is θ, and / or the angle between the second sidewall 32 facing the first sidewall 31 and the plane where the flat portion 39 is located is θ. The distance between the side of the first sidewall 31 away from the second sidewall 32 and the side of the second sidewall 32 away from the first sidewall 31 is W, and W = S * cosθ / 2.

[0072] Specifically, an alternative embodiment provided by the present application is that in addition to the above-mentioned convex portion 38 formed by the substrate 30 protruding on the light-emitting surface side of the third light-emitting region 13 facing the backlight module 100, the substrate 30 may further include a flat portion 39 located in the first light-emitting region 11 and the second light-emitting region 12. The extension direction of the plane of the substrate 30 where the flat portion 39 is located is parallel to the light-emitting surface of the backlight module 100; the light-emitting elements 20 located on the light-emitting surface side of the substrate 30 facing the backlight module 100 further include second light-emitting elements 22, and the second light-emitting elements 22 are all arranged on the flat portion 39, that is, the second light-emitting elements 22 are arranged in the first light-emitting region 11 and the second light-emitting region 12; the present application proposes to set W = S * cosθ / 2, so that the value of the maximum distance W between the side of the first side wall 31 away from the second side wall 32 and the side of the second side wall 32 away from the first side wall 31 is adjusted according to the value of S and the value of θ, so that the setting position of the first light-emitting element 21 is more reasonable, avoiding the problem of excessive local brightness caused by the overcrowded setting between the first sub-light-emitting element 211 and the second sub-light-emitting element 212, and also being able to avoid the problem of too low local brightness and the existence of dark areas caused by the too sparse setting between the first sub-light-emitting element 211 and the second sub-light-emitting element 212, thereby improving the light-emitting uniformity of the backlight module 100 and enhancing the overall display effect of the backlight module 100.

[0073] Please refer to Figure 1 、 Figure 3 and Figure 5 Optionally, along the thickness direction of the backlight module 100, the first side wall 31 includes an adjacent first sub-side wall 51 and second sub-side wall 52. The first sub-side wall 51 is located on the light-emitting surface side of the second sub-side wall 52 facing the backlight module 100, and the side of the second sub-side wall 52 away from the first sub-side wall 51 is connected to the flat portion 39 of the first light-emitting region 11; the second side wall 32 includes an adjacent third sub-side wall 53 and fourth sub-side wall 54. The third sub-side wall 53 is located on the light-emitting surface side of the fourth sub-side wall 54 facing the backlight module 100, and the side of the fourth sub-side wall 54 away from the third sub-side wall 53 is connected to the flat portion 39 of the second light-emitting region 12;

[0074] The plane where the second sub-side wall 52 is located is perpendicular to the plane where the flat portion 39 is located, and the plane where the fourth sub-side wall 54 is located is perpendicular to the plane where the flat portion 39 is located.

[0075] Specifically, the present application further provides an alternative implementation manner. The first sidewall 31 or the second sidewall 32 is provided to include not only a planar portion 39 extending in one direction. For example, the first sidewall 31 may be alternatively provided to include a first sub-sidewall 51 and a second sub-sidewall 52 that are connected. The first sub-sidewall 51 and the second sub-sidewall 52 are sequentially arranged along the thickness direction of the backlight module 100. The side of the second sub-sidewall 52 away from the first sub-sidewall 51 is connected to the planar portion 39 of the first light-emitting region 11; and / or, the second sidewall 32 may be alternatively provided to include a third sub-sidewall 53 and a fourth sub-sidewall 54 that are connected. The third sub-sidewall 53 and the fourth sub-sidewall 54 are sequentially arranged along the thickness direction of the backlight module 100. The side of the fourth sub-sidewall 54 away from the third sub-sidewall 53 is connected to the planar portion 39 of the second light-emitting region 12; further, the plane where the second sub-sidewall 52 is located may be alternatively provided to be perpendicular to the plane where the planar portion 39 of the substrate 30 is located, and the plane where the fourth sub-sidewall 54 is located may be alternatively provided to be perpendicular to the plane where the planar portion 39 of the substrate 30 is located; with such a setting, the second sub-sidewall 52 and the fourth sub-sidewall 54 that are perpendicular to the plane where the planar portion 39 is located are used to increase the height of the substrate 30 where the third light-emitting region 13 is provided. The first sub-sidewall 51 and the third sub-sidewall 53 are used as the substrate 30 regions for arranging the first light-emitting elements 21. Since along the thickness direction of the backlight module 100, the distance H between the side of the convex portion 38 facing the light-emitting surface side of the backlight module 100 and the side away from the light-emitting surface side of the backlight module 100 cannot be too low, with the setting of the present application, it can be avoided that the widths occupied by the first sidewall 31 and the second sidewall 32 that are inclined with respect to the substrate 30 of the planar portion 39 in the first direction X are too large. Therefore, by setting the second sub-sidewall 52 and the fourth sub-sidewall 54 that are perpendicular to the substrate 30 of the planar portion 39 to increase the height of the substrate 30 where the third light-emitting region 13 is provided, the space occupied by the first sub-sidewall 51 and the third sub-sidewall 53 that are inclined with respect to the substrate 30 of the planar portion 39 in the first direction X can be reduced, and the problem that the arrangements between the first light-emitting elements 21 are too sparse and / or the problem that the arrangements between the first sub-light-emitting elements 211 and the second sub-light-emitting elements 212 are too sparse can be avoided, thereby being beneficial to ensuring the display uniformity of the backlight module 100 and improving the display effect of the backlight module 100. In addition, setting the second sub-sidewall 52 and the fourth sub-sidewall 54 that are perpendicular to the substrate 30 of the planar portion 39 is also beneficial to enabling the first sub-sidewall 51 and the third sub-sidewall 53 for arranging the first light-emitting elements 21 to have a certain distance from the substrate 30 of the planar portion 39 along the thickness direction of the backlight module 100, avoiding the problem of insufficient setting space for the first light-emitting elements 21, so as to avoid the contact problem between the first sub-light-emitting elements 211 and the second sub-light-emitting elements 212, and being beneficial to ensuring the practicability of the backlight module 100.

[0076] Please refer to Figure 1 、 Figure 2 、Figure 3 and Figure 5 , optionally, 20° ≤ θ ≤ 80°.

[0077] Specifically, an alternative embodiment provided by the present application is that the included angle θ between the first side wall 31 facing the second side wall 32 and the plane of the flat portion 39, and the included angle θ between the second side wall 32 facing the first side wall 31 and the plane of the flat portion 39 are both in the range of 20° - 80°. If the value of θ is less than 20°, the difference between the first side wall 31 and the second side wall 32 and the flat portion 39 will be small, and the first side wall 31, the second side wall 32, and the flat portion 39 will approximately present a flat state. At this time, the light emitted by the second light-emitting element 22 provided in the first light-emitting area 11 and the first sub-light-emitting element 211 provided on the first side wall 31 during operation is very likely to be emitted to the area where the second side wall 32 and the second light-emitting area 12 are located, and it will still cause the display crosstalk problem on both sides of the boundary line L of the backlight module 100; if the value of θ is greater than 80°, the distance space between the first side wall 31 and the second side wall 32 will be extremely small, which is not conducive to the setting of other film layer materials in the distance space between the first side wall 31 and the second side wall 32. If other filling materials cannot be set in the distance space between the first side wall 31 and the second side wall 32, it may cause the problem of extrusion deformation of the first side wall 31 and / or the second side wall 32 during manufacturing or use, which is not conducive to the process stability and use stability of the backlight module 100. In addition, when the value of θ is greater than 80°, the first light-emitting element 21 provided on the first side wall 31 and the second side wall 32 has no contribution to the brightness of the connection area between the first side wall 31 and the second side wall 32, and it is easy to cause a light-emitting dark area in this area. Therefore, the present application selects to set the value range of θ to be between 20° and 80°, which can not only avoid the display crosstalk problem on both sides of the boundary line L of the backlight module 100, but also realize the stable setting of the first side wall 31 and the second side wall 32, and ensure the light-emitting effect of the backlight module 100.

[0078] The present application does not limit the specific value of θ, and the value of θ can be selected as 20°, or 45°, or 60°, or 70°, or 80°, etc. according to actual needs.

[0079] It should also be added that when the first side wall 31 is provided to include an adjacent first sub-side wall 51 and a second sub-side wall 52, the plane of the second sub-side wall 52 is perpendicular to the plane of the planar portion 39, and the second side wall 32 includes an adjacent third sub-side wall 53 and a fourth sub-side wall 54, and the plane of the fourth sub-side wall 54 is perpendicular to the plane of the planar portion 39, it is optional to set the range of the angle between the side of the first sub-side wall 51 facing the third sub-side wall 53 and the plane of the planar portion 39 to be between 60° and 80°. At the same time, it is optional to set the range of the angle between the side of the third sub-side wall 53 facing the first sub-side wall 51 and the plane of the planar portion 39 to be between 60° and 80°. For example, it can be optionally set that the value of this angle is 60°, or 70°, or 80°, etc. Setting this angle larger is beneficial to avoiding light crosstalk between the first light-emitting elements 21 respectively arranged on the first sub-side wall 51 and the third sub-side wall 53, and can enable the first sub-side wall 51 and the third sub-side wall 53 to occupy a relatively large height in the thickness direction of the backlight module 100, so as to leave enough setting space for the first light-emitting elements 21, and avoid the situation that the distance between the side of the first light-emitting element 21 facing the light-emitting surface of the backlight module 100 and the planar portion 39 is larger than the distance between the side of the first sub-side wall 51 away from the planar portion 39 and the planar portion 39, so that the side of the first light-emitting element 21 arranged on the first sub-side wall 51 and / or the third sub-side wall 53 facing the light-emitting surface of the backlight module 100 does not exceed the height of the protruding portion 38 facing the light-emitting surface of the backlight module 100, so as to avoid the contact between other film layer structures required to be arranged on the side of the light-emitting element 20 of the backlight module 100 away from the substrate 30 and the first light-emitting element 21 during assembly, thereby avoiding damage to the first light-emitting element 21 during the assembly process and improving the manufacturing yield of the backlight module 100; and at the same time, it can avoid damage to the first light-emitting element 21 caused by the sinking of other film layer structures required to be arranged on the side of the light-emitting element 20 away from the substrate 30 towards the substrate 30 during the use of the backlight module 100, improve the use yield of the backlight module 100, and thus improve the use yield of the corresponding display device.

[0080] Figure 6 The following shows a schematic diagram of a substrate in the AA' cross-sectional view provided by an embodiment of the present application Figure 1 in one schematic diagram, Figure 7 The following shows a schematic diagram of a substrate in the AA' cross-sectional view provided by an embodiment of the present application Figure 1 in another schematic diagram, Figure 8 The following shows a schematic diagram of a substrate in the AA' cross-sectional view provided by an embodiment of the present application Figure 1 in another schematic diagram. Please refer to Figure 1 , Figure 2 , Figure 5 and Figures 6 - 8 . Optionally, the first side wall 31 is adjacent to the second side wall 32; or,

[0081] There is a connecting portion 33 between the first sidewall 31 and the second sidewall 32.

[0082] Specifically, an alternative embodiment provided by the present application is that, as Figure 2 , Figure 5 shown, it can be alternatively arranged that the side of the first sidewall 31 away from the first light-emitting region 11 in the same third light-emitting region 13 is directly connected to the side of the second sidewall 32 away from the second light-emitting region 12. That is, along the first direction X, the substrate 30 sequentially includes a planar portion 39 in the first light-emitting region 11, the first sidewall 31 and the second sidewall 32 in the third light-emitting region 13, and a planar portion 39 in the second light-emitting region 12. Here, the planar portion 39, the first sidewall 31, the second sidewall 32, and the planar portion 39 arranged in sequence along the first direction X are connected to form a complete substrate 30 in this region.

[0083] In addition, as Figures 6 - 8 shown, it can also be alternatively arranged that there is a connecting portion 33 between the side of the first sidewall 31 away from the first light-emitting region 11 and the side of the second sidewall 32 away from the second light-emitting region 12 in the same third light-emitting region 13, and the connection between the first sidewall 31 and the second sidewall 32 is realized through this connecting portion 33; the present application does not limit the specific shape of the connecting portion 33. Optionally, the connecting portion 33 includes at least one arc surface or at least one plane.

[0084] The present application does not specifically limit whether there is a connecting portion 33 between the first sidewall 31 and the second sidewall 32, and corresponding selection can be made according to requirements, as long as the setting space of the first light-emitting element 21 is sufficient to avoid the problem of light crosstalk between the regions on both sides of the dividing line L, and at the same time, the display uniformity of the backlight module 100 is ensured.

[0085] Figure 9 The figure shows a top view of a dividing line provided by an embodiment of the present application. Figure 10 The figure shows another top view of a dividing line provided by an embodiment of the present application. Figure 11 The figure shows another top view of a dividing line provided by an embodiment of the present application. Figure 12 The figure shows another top view of a dividing line provided by an embodiment of the present application. Figure 13 The figure shows another top view of a dividing line provided by an embodiment of the present application. Please refer to Figures 1 - 8 for reference. Figures 9 - 13, it should also be added that, along the thickness direction perpendicular to the backlight module 100, the dividing line L formed by the connection between the first sidewall 31 and the second sidewall 32 can be optionally set as a straight line, or the dividing line L formed by the connection between the first sidewall 31 and the second sidewall 32 can be set as a curve; the extending direction of the connecting portion 33 between the first sidewall 31 and the second sidewall 32 can be a straight line or a curve, and can be selected and set according to requirements.

[0086] Please refer to Figures 1 - 8 , optionally, the substrate 30 is a flexible substrate.

[0087] Specifically, an alternative setting method provided in this application is that a flexible substrate can be optionally used as the substrate 30 of the backlight module 100. At this time, for the setting method in which the substrate 30 includes a flat portion 39 and a convex portion 38 in a certain area, the shape of the flexible substrate 30 can be defined according to other structures disposed on the side of the substrate 30 away from the light-emitting surface of the backlight module 100 to achieve the desired shape of the substrate 30.

[0088] Of course, this application is not limited thereto. The desired shape of the substrate 30 can be optionally spliced using multiple sub-substrate structures, or the desired shape of the substrate 30 can be directly fabricated in a mold.

[0089] Figure 14 The figure shows a schematic diagram of a display module provided by an embodiment of this application. Figure 15 The figure shows the one provided by an embodiment of this application Figure 14 An enlarged schematic diagram of area C in Figure 16 The figure shows the one provided by an embodiment of this application Figure 14 A cross-sectional schematic diagram of DD' in Figures 1 - 13 Please refer to Figures 14 - 16 , based on the same inventive concept, this application also provides a display module 200, which includes a backlight module 100. The backlight module 100 is any one of the backlight modules 100 provided by this application;

[0090] The display module 200 includes a display area 80, and the display area 80 includes a first display area 88 and a second display area 89 arranged adjacent to each other along the first direction X. The first display area 88 includes a first light-emitting area 11 and a third light-emitting area 13 provided with a first sidewall 31, and the second display area 89 includes a second light-emitting area 12 and a third light-emitting area 13 provided with a second sidewall 32;

[0091] The backlight module 100 includes a plurality of light-emitting elements 20 located on the side of the substrate 30 facing the light-emitting surface of the backlight module 100;

[0092] It further includes a support frame 90, and the support frame 90 is located on the side of the substrate 30 away from the light-emitting elements 20;

[0093] The support frame 90 includes a protruding member 91, and the protruding member 91 is embedded in the protruding portion 38.

[0094] Specifically, the present application further provides a display module 200 corresponding to the backlight module 100. The display area 80 in the display module 200 includes a first display area 88 and a second display area 89 arranged adjacent to each other in the first direction X. The first display area 88 corresponds to the first light-emitting area 71 in the light-emitting area 10, and the second display area 89 corresponds to the second light-emitting area 72 in the light-emitting area 10. Among them, the first display area 88 and the second display area 89 specifically include a first sub-display area 81 corresponding to the first light-emitting area 11, a second sub-display area 82 corresponding to the second light-emitting area 12, and a third sub-display area 83 corresponding to the third light-emitting area 13. The display area 80 may include a boundary line L corresponding to the light-emitting area 10. One side of the boundary line L is the first display area 88, and the other side is the second display area 89. Based on the backlight module 100 proposed in the present application, it can be realized that the display light of the first display area 88 does not emit to the side of the second display area 89, avoiding the interference of the display light of the first display area 88 on the display effect of the second display area 89. Similarly, it can also avoid the interference of the display light of the second display area 89 on the display effect of the first display area 88, so as to make the display effects of the pictures on both sides of the boundary line L along the first direction X clearer, improve the display effect of the corresponding display panel, and enhance the user experience.

[0095] Among them, the sizes of the first display area 88 and the second display area 89 may be the same or different. One display module 200 may include one first display area 88, or may include two or more first display areas 88. Similarly, one display module 200 may include one second display area 89, or may include two or more second display areas 89.

[0096] In addition, the display module 200 provided in the present application further includes a support frame 90 located on the side of the substrate 30 away from the light-emitting element 20. The support frame 90 may at least include a protruding member 91, and the protruding member 91 is embedded in the space of the protruding portion 38 formed by the first side wall 31 and the second side wall 32 to realize the support for the first side wall 31 and the second side wall 32, so as to stabilize the installation position of the first sub-light-emitting element 211 and ensure the reliability of the backlight module 100. Optionally, the support frame 90 may also include a flat plate 92. The flat plate 92 corresponds to the flat portion 39 in the backlight module 100, and the flat plate 92 is located on the side of the flat portion 39 of the substrate 30 away from the light-emitting surface of the backlight module 100 to support the flat portion 39 with the flat plate 92 and ensure the reliability of the backlight module 100.

[0097] Among them, the convex member 91, or the flat plate 92 and the convex member 91 can be selectively formed by die casting, and then directly installed on the side of the substrate 30 of the backlight module 100 away from the light-emitting surface of the backlight module 100. Of course, the present application is not limited thereto, and other manufacturing methods can also be selected according to requirements to realize the manufacture of the support frame 90.

[0098] Figure 17 The following is a schematic diagram of a display device provided by an embodiment of the present application. Please refer to Figures 1 - 16 with reference to Figure 17 , based on the same inventive concept, the present application also provides a display device 300, which includes a display module 200. The display module 200 is any one of the display modules 200 provided by the present application.

[0099] It should be noted that for the embodiments of the display device 300 provided by the embodiments of the present application, reference can be made to the embodiments of the above display module 200, and repeated descriptions will not be elaborated. The display device 300 provided by the present application can be: a mobile phone, a tablet computer, a television, a monitor, a notebook computer, an in-vehicle display screen, a navigator, or any other product and component with a display function.

[0100] As can be seen from the above embodiments, the backlight module, the display module, and the display device provided by the present invention at least achieve the following beneficial effects:

[0101] The present application provides a backlight module, a display module, and a display device. The light-emitting area of the backlight module at least includes a first light-emitting area, a third light-emitting area, and a second light-emitting area that are adjacent to each other in pairs. By providing that the substrate corresponding to the third light-emitting area located between the first light-emitting area and the second light-emitting area includes a convex portion protruding toward the light-emitting surface side of the backlight module, the convex portion includes a first side wall facing the first light-emitting area and a second side wall facing the second light-emitting area, and at least one of the first side wall and the second side wall is provided with a first light-emitting element that emits light toward the corresponding first light-emitting area and second light-emitting area, so that the light-emitting elements disposed in the third light-emitting area adjacent to the first light-emitting area and / or the second light-emitting area can emit light toward the inside of the corresponding light-emitting area, so as to avoid the problem of light crosstalk between the light-emitting elements disposed on the first side wall and the second side wall, so that the display boundary between the first light-emitting area and the third light-emitting area provided with the first side wall, and the third light-emitting area provided with the second side wall and the second light-emitting area is clearer, and the display quality is improved.

[0102] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A backlight module, characterized in that, It includes a light-emitting region; The light-emitting region at least includes a first light-emitting region, a second light-emitting region, and a third light-emitting region. Along a first direction, the third light-emitting region is located between the first light-emitting region and the second light-emitting region, and the first light-emitting region, the third light-emitting region, and the second light-emitting region are arranged adjacent to each other in pairs; It further includes a substrate. The substrate protrudes to form a protruding portion on a side of the third light-emitting region facing the light-out surface of the backlight module. The protruding portion at least includes a first sidewall facing the first light-emitting region and a second sidewall facing the second light-emitting region; It further includes a plurality of light-emitting elements located on a side of the substrate facing the light-out surface of the backlight module. The light-emitting elements include a first light-emitting element, and the first light-emitting element is located on the first sidewall and / or the second sidewall; The substrate located in the first light-emitting region and the second light-emitting region is a flat portion, and a plane where the flat portion is located is parallel to the light-out surface of the backlight module; The light-emitting elements further include a second light-emitting element, and the second light-emitting element is located on the flat portion; Along the thickness direction of the backlight module, a distance between a side of the protruding portion facing the light-out surface of the backlight module and a side away from the light-out surface of the backlight module is H; along the first direction, a distance between centers of two adjacent second light-emitting elements located in the first light-emitting region or the second light-emitting region is S, and H≤S; Along the thickness direction of the backlight module, a distance between a side of the first light-emitting element facing the light-out surface of the backlight module and a side of the protruding portion away from the light-out surface of the backlight module is H1, and H>H1.

2. The backlight module according to claim 1, wherein The first light-emitting element located on the first sidewall is a first sub-light-emitting element, and the first light-emitting element located on the second sidewall is a second sub-light-emitting element; Along a direction perpendicular to a plane where the first sidewall is located, the first sub-light-emitting element includes a first sub-light-emitting surface on a side away from the first sidewall, and the first sub-light-emitting surface faces the first light-emitting region; Along a direction perpendicular to a plane where the second sidewall is located, the second sub-light-emitting element includes a second sub-light-emitting surface on a side away from the second sidewall, and the second sub-light-emitting surface faces the second light-emitting region.

3. The backlight module according to claim 1, wherein Structures of the first light-emitting element and the second light-emitting element are the same.

4. The backlight module according to claim 1, wherein The substrate located in the first light-emitting region and the second light-emitting region is a flat portion, and a plane where the flat portion is located is parallel to the light-out surface of the backlight module; The light-emitting elements further include a second light-emitting element, and the second light-emitting element is located on the flat portion; Along the first direction, the distance between two adjacent second light-emitting elements located in the first light-emitting region or the second light-emitting region is S. The angle between the side of the first sidewall facing the second sidewall and the plane of the planar portion is θ, and / or the angle between the side of the second sidewall facing the first sidewall and the plane of the planar portion is θ. The distance between the side of the first sidewall away from the second sidewall and the side of the second sidewall away from the first sidewall is W, and W = S cosθ / 2.

5. The backlight module according to claim 4, wherein In the thickness direction of the backlight module, the first sidewall includes a first sub-sidewall and a second sub-sidewall that are connected. The first sub-sidewall is located on the side of the second sub-sidewall facing the light-emitting surface of the backlight module. The side of the second sub-sidewall away from the first sub-sidewall is connected to the planar portion of the first light-emitting region. The second sidewall includes a third sub-sidewall and a fourth sub-sidewall that are connected. The third sub-sidewall is located on the side of the fourth sub-sidewall facing the light-emitting surface of the backlight module. The side of the fourth sub-sidewall away from the third sub-sidewall is connected to the planar portion of the second light-emitting region. The plane where the second sub-sidewall is located is perpendicular to the plane where the planar portion is located, and the plane where the fourth sub-sidewall is located is perpendicular to the plane where the planar portion is located.

6. The backlight module according to claim 4 or 5, characterized in that, 20° ≤ θ ≤ 80°.

7. The backlight module according to claim 4, wherein the first sidewall is connected to the second sidewall; or, a connecting portion is included between the first sidewall and the second sidewall.

8. The backlight module according to claim 7, wherein the connecting portion includes at least one arc surface or at least one planar surface.

9. The backlight module according to claim 1, wherein the substrate is a flexible substrate.

10. A display module, characterized in that, including the backlight module according to any one of claims 1-9; the display module includes a display area, the display area includes a first display area and a second display area that are adjacent to each other along a first direction. The first display area includes a first light-emitting region and a third light-emitting region where the first sidewall is provided. The second display area includes a second light-emitting region and a third light-emitting region where the second sidewall is provided; the backlight module includes a plurality of light-emitting elements located on the side of the substrate facing the light-emitting surface of the backlight module; further includes a support frame, and the support frame is located on the side of the substrate away from the light-emitting elements; the support frame includes a protruding member, and the protruding member is embedded in the protruding portion.

11. A display device, characterized in that, including the display module according to claim 10.

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