Backlight module, display module and display device

Abstract

The embodiment of the utility model provides a backlight module, a display module and a display device, relates to the technical field of display, and aims to solve the problem of dark-state light leakage and improve the display device. The backlight module is provided with a light emitting face and a backlight face, the backlight module comprises a frame assembly and a light emitting assembly, the frame assembly comprises a back plate and a rubber frame arranged on the periphery of the back plate, the rubber frame is connected with the back plate and comprises a plurality of frames, the frames define a frame shape, and every two adjacent frames are connected to form a frame corner; the light emitting assembly is arranged in the frame assembly and located on the side, close to the light emitting face, of the back plate. The backlight assembly comprises a corner area and other areas, the frame corners are located in the corner area, and the part, located in the corner area, of the frame assembly is higher than the part, located in the other areas, of the frame assembly.

Description

Technical Field

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

[0002] Liquid Crystal Displays (LCDs) have the characteristics of small volume, low power consumption, lightness, thinness, and no radiation, and have been widely used in the display field. With the development of display technologies, their display quality has been continuously improved with the progress of manufacturing process technologies. Summary of the Utility Model

[0003] The purpose of the embodiments of the present disclosure is to provide a backlight module, a display module, and a display device, which are used to improve the problem of light leakage in the dark state and enhance the display effect of the display device.

[0004] To achieve the above purpose, the embodiments of the present disclosure provide the following technical solutions:

[0005] On the one hand, a backlight module is provided. The backlight module has a light-emitting surface and a backlight surface. The backlight module includes a frame assembly and a light-emitting assembly. The frame assembly includes: a back plate, and a rubber frame disposed around the periphery of the back plate. The rubber frame is connected to the back plate. The rubber frame includes a plurality of frames, and the plurality of frames enclose a frame shape, and adjacent two frames are connected to form a frame corner. The light-emitting assembly is disposed within the frame assembly and is located on the side of the back plate close to the light-emitting surface. The backlight module includes a corner area and other areas, and the frame corner is located in the corner area. Among them, the height of the part of the frame assembly located in the corner area is greater than the height of the part of the frame assembly located in the other areas.

[0006] Setting the height of the part of the frame assembly located in the corner area to be greater than the height of the part of the frame assembly located in the other areas can enable the stress concentration position to be controlled in the corner area when the backlight module is bent, and the light leakage position of the display device is concentrated at the position where stress is generated. That is, such a setting can greatly reduce the light leakage area of the liquid crystal display device, improve the light leakage problem of the display device under dark conditions, enhance the contrast of the display device under dark conditions, and enhance the user experience.

[0007] In some embodiments, the frame includes a first part and a second part, and the size of the frame corner in the first direction is greater than the size of the frame in the first direction; the first direction is the thickness direction of the backlight module, the first part is the part of the frame that constitutes the frame corner, and the second part is the part of the frame other than the first part.

[0008] In some embodiments, a convex structure is provided on a side of the frame corner close to the light-emitting surface.

[0009] In some embodiments, the backplane includes a bottom plate, a plurality of side plates connected to the bottom plate, and a plurality of connecting parts. The connecting parts are connected to the top corner positions of the bottom plate, and both sides of the connecting parts are connected to two adjacent side plates; a dimension of a portion of the side plate close to the corner area in a first direction is greater than a dimension of a portion of the side plate away from the corner area in the first direction.

[0010] In some embodiments, the backplane is arc-shaped, and along a direction from the center of the backplane to the edge, the backplane bends towards the light-emitting surface; the bottom plate includes adjacent first and second side edges. Wherein, in a plane parallel to the bottom plate, the extending direction of the first side edge is a second direction, the extending direction of the second side edge is a third direction, the second direction and the third direction intersect, the backplane has a first curvature in the second direction and a second curvature in the third direction.

[0011] In some embodiments, a plurality of protruding parts are provided on the side plate, a plurality of fixing holes are provided on the rubber frame, and the plurality of protruding parts of the backlight panel respectively correspond to and are snap-connected to the plurality of fixing holes of the rubber frame; among multiple groups of the connected protruding parts and the fixing holes, a gap between the protruding part close to the corner area and the fixing hole is greater than a gap between the protruding part away from the corner area and the fixing hole.

[0012] In some embodiments, a light transmittance of the corner area is less than a light transmittance of the other areas.

[0013] In some embodiments, the light-emitting assembly includes a light guide plate, a reflective sheet, and a plurality of layers of optical films. The light guide plate is disposed on a side of the backplane close to the light-emitting surface; the reflective sheet is disposed on a side of the light guide plate close to the backplane; the plurality of layers of optical films are disposed on a side of the light guide plate away from the backplane; wherein, at least one layer of optical film in the plurality of layers of optical films, and / or the light guide plate, and / or a surface of the reflective sheet close to the backplane are arranged with first dots and second dots. Among them, the first dots are located in the corner area, the second dots are located in the other areas, and a density of the first dots is less than a density of the second dots.

[0014] In some embodiments, a plurality of first microstructures arranged in an array are provided on a surface of the light guide plate away from the backplane. The plurality of first microstructures are located in the other areas, and the plurality of first microstructures are configured to change a propagation direction of at least a part of light emitted along a surface of the light guide plate away from the backplane.

[0015] In some embodiments, a plurality of prism structures arranged in an array are provided inside the surface of the light guide plate on the side away from the back plate, the plurality of prism structures are located in the corner area, and the plurality of prism structures are configured to change the propagation direction of at least a part of the light rays incident on the surface of the light guide plate on the side away from the back plate.

[0016] In some embodiments, a first material is provided inside the first dot and the second dot, wherein the refractive index of the first material located inside the first dot is higher than the refractive index of the first material located inside the first dot.

[0017] In some embodiments, in the corner area, an absorbing ink is provided on the surface of the light guide plate on the side close to the back plate, and in the other areas, a reflective ink is provided on the surface of the light guide plate on the side close to the back plate.

[0018] In some embodiments, a plurality of light-passing holes are provided in the part of the reflective sheet located in the corner area.

[0019] In some embodiments, the orthographic projection of the reflective sheet on the back plate is located within the orthographic projection of the light guide plate on the back plate, and in the corner area, the orthographic projection of the reflective sheet on the back plate and the orthographic projection of the light guide plate on the back plate do not overlap.

[0020] In some embodiments, in the corner area, an absorbing ink is provided on the surface of the reflective sheet on the side close to the back plate, and in the other areas, a reflective ink is provided on the surface of the reflective sheet on the side close to the back plate.

[0021] In some embodiments, a plurality of second microstructures arranged in an array are provided on the surface of at least one optical film in the multi-layer optical film on the side away from the light guide plate, the plurality of second microstructures are located in the other areas, and the plurality of second microstructures are configured to change the propagation direction of at least a part of the light rays exiting from the optical film.

[0022] In some embodiments, in the corner area, an absorbing ink is provided on the surface of at least one optical film in the multi-layer optical film on the side close to the back plate, and in the other areas, a reflective ink is provided on the surface of at least one optical film in the multi-layer optical film on the side close to the back plate.

[0023] In some embodiments, the multi-layer optical film includes a reflective brightness enhancement film, wherein, in the other areas, a brightness enhancement layer is provided inside the reflective brightness enhancement film, and the refractive index of the part of the reflective brightness enhancement film in the corner area is higher than the refractive index of the part of the reflective brightness enhancement film in the other areas.

[0024] On the other hand, a display module is provided. The display module includes: a backlight module as described in any one of the above embodiments of one aspect, which is configured to emit light and provide a backlight source; and a display panel disposed on the backlight module. Wherein, the display panel is connected to a rubber frame of the backlight module, and the display panel is configured to display a to-be-displayed image.

[0025] The above display module has the same structure and beneficial technical effects as the backlight module provided in some of the above embodiments, and will not be described in detail herein.

[0026] In yet another aspect, a display device is provided. The display device includes: a display module as described in any one of the above embodiments of the other aspect.

[0027] The above display device has the same structure and beneficial technical effects as the display module provided in some of the above embodiments, and will not be described in detail herein. Description of the Drawings

[0028] To more clearly illustrate the technical solutions in the present disclosure, the drawings required for some embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings in the following description are only the drawings of some embodiments of the present disclosure, and those of ordinary skill in the art can also obtain other drawings based on these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limitations on the actual dimensions of the products, the actual processes of the methods, the actual timings of the signals, etc. involved in the embodiments of the present disclosure.

[0029] Figure 1A Structural diagram of a display device according to some embodiments of the related art;

[0030] Figure 1B Cross-sectional structural diagram of a display device according to some embodiments of the related art;

[0031] Figure 2A Structural diagram of a display device provided according to some embodiments of the present disclosure;

[0032] Figure 2B For some embodiments of the present disclosure Figure 2A Cross-sectional structural diagram obtained by taking a cross-section along the section line CC';

[0033] Figure 3A Schematic diagram of a light leakage area of a display device according to some embodiments of the related art;

[0034] Figure 3B Schematic diagram of a light leakage area of a display device provided according to some embodiments of the present disclosure;

[0035] Figure 4AA partial enlarged structure diagram of a glue frame provided according to some embodiments of the present disclosure;

[0036] Figure 4B Another partial enlarged structure diagram of a glue frame provided according to some embodiments of the present disclosure;

[0037] Figure 5 Yet another partial enlarged structure diagram of a glue frame provided according to some embodiments of the present disclosure;

[0038] Figure 6 A structure diagram of a glue frame and a backplane provided according to some embodiments of the present disclosure;

[0039] Figure 7A A side view structure diagram of a backplane provided according to some embodiments of the present disclosure;

[0040] Figure 7B A plan view structure diagram of a backplane provided according to some embodiments of the present disclosure;

[0041] Figure 7C A side view structure diagram of a backplane provided according to some embodiments of the present disclosure;

[0042] Figure 8A A connection structure diagram of a glue frame and a backplane provided according to some embodiments of the present disclosure;

[0043] Figure 8B According to some embodiments of the present disclosure Figure 8A A partial enlarged structure diagram provided;

[0044] Figure 8C According to some embodiments of the present disclosure Figure 8A A partial enlarged structure diagram provided;

[0045] Figure 9 A structure diagram of a light guide plate provided according to some embodiments of the present disclosure;

[0046] Figure 10 A structure diagram of a first microstructure provided according to some embodiments of the present disclosure;

[0047] Figure 11 A structure diagram of a prism structure provided according to some embodiments of the present disclosure;

[0048] Figure 12 A plan view structure diagram of a reflective sheet provided according to some embodiments of the present disclosure;

[0049] Figure 13A Another plan view structure diagram of a reflective sheet provided according to some embodiments of the present disclosure;

[0050] Figure 13B Another plan view structure diagram of a reflective sheet provided according to some embodiments of the present disclosure;

[0051] Figure 14 Structure diagram of a second microstructure provided according to some embodiments of the present disclosure;

[0052] Figure 15 Plan view structure diagram of a reflective brightness enhancement film in an optical film provided according to some embodiments of the present disclosure;

[0053] Figure 16 Structure diagram of an optical film provided according to some embodiments of the present disclosure;

[0054] Figure 17 Structure diagram of a display device provided according to some embodiments of the present disclosure. Detailed implementation manners

[0055] Next, the technical solutions in some embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided by the present disclosure fall within the scope of protection of the present disclosure.

[0056] Unless otherwise required by the context, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular form "comprises" and the present participle form "comprising", are interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples", etc. are intended to indicate that specific features, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0057] Hereinafter, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more.

[0058] In describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components have direct physical contact or electrical contact. The term "coupled" or "communicatively coupled" may also mean that two or more components do not have direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content herein.

[0059] "At least one of A, B, and C" has the same meaning as "at least one of A, B, or C", and both include the following combinations of A, B, and C: only A, only B, only C, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0060] "A and / or B" includes the following three combinations: only A, only B, and the combination of A and B.

[0061] As used herein and depending on the context, the term "if" is optionally interpreted to mean "when" or "at the time of" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if it is determined that..." or "if [the stated condition or event] is detected" is optionally interpreted to mean "when it is determined that..." or "in response to determining..." or "at the time of detecting [the stated condition or event]" or "in response to detecting [the stated condition or event]".

[0062] The use of "adapted to" or "configured to" herein means open and inclusive language, which does not exclude devices adapted to or configured to perform additional tasks or steps.

[0063] In addition, the use of "based on" means open and inclusive because a process, step, calculation, or other action "based on" one or more of the stated conditions or values may, in practice, be based on additional conditions or values beyond the stated ones.

[0064] As used herein, "about", "substantially" or "approximately" includes the stated value and the average value within an acceptable deviation range of the specific value, where the acceptable deviation range is determined by those of ordinary skill in the art in view of the measurement being discussed and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system).

[0065] As used herein, "parallel", "perpendicular", "equal" include the stated situation and situations similar to the stated situation, where the range of the similar situations is within an acceptable deviation range, and the acceptable deviation range is determined by those of ordinary skill in the art in view of the measurement being discussed and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, where the acceptable deviation range of approximate parallel can be, for example, within 5% deviation; "perpendicular" includes absolute perpendicular and approximate perpendicular, where the acceptable deviation range of approximate perpendicular can also be, for example, within 5% deviation. "Equal" includes absolute equal and approximate equal, where the acceptable deviation range of approximate equal can be, for example, that the difference between the two equal ones is less than or equal to 5% of either one of them.

[0066] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can be that the layer or element is directly on the other layer or substrate, or there can be an intermediate layer between the layer or element and the other layer or substrate.

[0067] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of the layers and the area of the regions are enlarged for clarity. Thus, variations in the shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances can be envisioned. Accordingly, the exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but include shape deviations caused by, for example, manufacturing. For example, an etched region shown as rectangular will generally have curved features. Thus, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shape of the regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0068] With the increasingly wide application of curved display devices in the display field, curved display devices have also become an important development direction in display technology. Among them, the concept of curved display devices is to make the display screen present a curved shape, so as to better fit the visual curve of the human eye and provide a more immersive viewing experience. Compared with traditional flat display devices, curved display devices have higher value, and among the same size, the smaller the curvature of the curved display device, the higher the added value. Currently, the development of curved display devices towards small curvature has become the mainstream.

[0069] In some embodiments, the curved display device is, for example, a curved liquid crystal display device. The curved liquid crystal display device includes a backlight module and a liquid crystal display panel, etc. Exemplarily, the liquid crystal display panel is, for example, a flat design, and the backlight module is, for example, a curved design. During the manufacturing process, the liquid crystal display panel needs to be attached to the backlight module and bent along with the curved shape of the backlight module. That is to say, certain stress will be generated after the liquid crystal display panel is bent, and this stress is caused by the curved shape of the backlight module.

[0070] It should be noted that since the liquid crystal display panel itself cannot emit light, a backlight module needs to be provided. The light emitted by the backlight source in the backlight module passes through the liquid crystal layer in the liquid crystal display panel and then exits. Since the liquid crystal layer in the liquid crystal display panel includes liquid crystal molecules arranged in a certain alignment direction and can play a role in optical rotation, after the light passes through the liquid crystal layer, different sub-pixels can emit light with corresponding brightness according to the different arrangements of the liquid crystal molecules, so that the liquid crystal display panel can display the picture to be displayed. Among them, the picture to be displayed is the picture that the liquid crystal display device needs to present. For example, the picture to be displayed is a black, white, gray or color picture, etc. When the liquid crystal display panel is bent, the liquid crystal molecules in the liquid crystal layer provided in the liquid crystal display panel are affected by stress, and their arrangement will change. At this time, when the light passes through the liquid crystal display panel, it will cause light anisotropy, and further cause different degrees of light leakage when the liquid crystal display panel is in the dark state.

[0071] The inventors of the present application found that the above-mentioned bending stress has different magnitudes corresponding to different positions of the liquid crystal display panel. The light leakage positions of the liquid crystal display panel also have a certain degree of randomness, and the curved shape of the liquid crystal display panel is related to the shape of the backlight module. That is to say, different structures of the backlight module result in different bending stresses acting on the liquid crystal display panel, and different stress concentration positions will cause different degrees of light leakage problems on the liquid crystal display panel. Therefore, the light leakage position of the liquid crystal display panel in the dark state is affected by the structural design of the backlight module.

[0072] In summary, it is necessary to optimize the structure of the backlight module in the curved liquid crystal display device and be able to stably fix the position where the stress generated by the backlight module is the largest, so as to fix the position where the maximum bending stress is generated when the liquid crystal display panel is attached to the backlight module, so that the position where light leakage occurs in the dark state in the curved liquid crystal display device is fixed at the position where the stress is the largest, and further improve the light leakage at this position.

[0073] Based on this, some embodiments of the present disclosure provide a backlight module, a display module, and a display device. By adjusting the structure of some film layers or components in the backlight module, the stress concentration positions are reasonably fixed, and the light leakage at the stress concentration positions of each film layer in the backlight module is improved, thereby avoiding the problem of light leakage in the dark state of the display device and simultaneously improving the display effect of the display device.

[0074] The backlight module, the display module, and the display device provided by the present disclosure are introduced separately below.

[0075] As Figure 2A shown, some embodiments of the present disclosure provide a display device 1000. The display device provided by the embodiments of the present disclosure can be any device that displays whether it is moving (e.g., video) or stationary (e.g., still image), and whether it is text or image. More specifically, it is expected that the embodiments can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal digital assistants (abbreviated as PDA), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, video cameras, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photos, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc., any product or component with a display function.

[0076] The above display device 1000 can be any one of a curved display device, a foldable display device, or a rollable display device.

[0077] Taking the above display device 1000 as a curved display device as an example, some embodiments of the present disclosure are schematically described below. However, the implementation manners of the present disclosure are not limited thereto, and any other display device 1000 can also be considered as long as the same technical idea is applied.

[0078] Among them, the curved display device 1000 includes a liquid crystal display (abbreviated as LCD). In the embodiments of the present disclosure, the liquid crystal display is mainly used as an example for exemplary description.

[0079] As Figure 2A and Figure 2BAs shown in the figure, the present disclosure provides a backlight module 10. The backlight module 10 has a light-emitting surface 10a and a backlight surface 10b. The backlight module 10 includes a frame assembly 101 and a light-emitting assembly 102. The frame assembly 101 includes: a back plate 1, and a rubber frame 2 disposed around the back plate 1. The rubber frame 2 is connected to the back plate 1. The rubber frame 2 includes a plurality of frame sides 21. The plurality of frame sides 21 enclose a frame shape, and two adjacent frame sides 21 are connected to form a frame corner 22. The light-emitting assembly 102 is disposed within the frame assembly 101 and is located on the side of the back plate 1 close to the light-emitting surface 10a. The backlight module 10 includes a corner area AA and other areas BB. The frame corner 22 is located in the corner area AA. Among them, the height H1 of the part of the frame assembly 101 located in the corner area AA is greater than the height H2 of the part of the frame assembly 101 located in the other areas BB.

[0080] As Figure 2A shown, taking the overall shape of the backlight module as a cuboid-like example, the light-emitting surface 10a and the backlight surface 10b are respectively the two surfaces with the largest relative area of the cuboid. The corner area is the area where the four top corners of the cuboid are located. For example, taking the top and bottom of the cuboid as the centers and a set distance as the radius, the obtained sector area is the corner area. The set distance is determined according to the specific structure of the backlight module. The area of the backlight module except the corner area is the other area BB.

[0081] Exemplarily, referring to Figure 1A and Figure 1B , Figure 1A is a structural diagram of a display device in the related art, Figure 1B is Figure 1A the cross-sectional structural diagram obtained by making a cross-section along the section line DD' in Figure 1B . Among them, it can be obtained from Figure 1A that there is no height difference between the height H1 of the part of the frame assembly 101 of the backlight module 10 in the corner area AA and the height H2 of the part located in the other areas BB, and H1 is equal to H2, that is, the overall height of the frame assembly 101 is consistent. Continuing with the parameter Figure 1A it can be obtained that the overall shape of the display device shown in Figure 2A and Figure 2B is a curved surface shape, that is, the backlight module is curved from the center to both sides. In the present application, referring to Figure 2A and Figure 2B , Figure 2A is a structural diagram of a display device in some embodiments of the present application, Figure 2B is Figure 2A the cross-sectional structural diagram obtained by making a cross-section along the section line CC' in Figure 2BIt can be obtained that the height H1 of the border component 101 of the backlight module 10 in the corner area AA is greater than the height H2 of the border component 101 in other areas BB. That is to say, the part of the backlight module 10 in the corner area AA is warped towards the light-emitting surface 10a side relative to the part in other areas BB. Refer to Figure 2A , it can be concluded that Figure 2A the backlight module shown not only has an overall curved shape, but also relative to Figure 1A the backlight module, Figure 2A the part of the backlight module shown in the corner area AA is more curved, that is, it is warped towards the light-emitting surface 10a side.

[0082] It should be explained that the above height is the distance dimension between the surface of the backplane 1 of the backlight module 1 close to the backlight surface 10b and the surface of the glue frame 2 far from the backlight surface 10b.

[0083] Refer to Figure 3A and Figure 3B , Figure 3A are the schematic diagrams of the light leakage positions of the display devices corresponding to Figure 1A and Figure 1B in the related art. Figure 3B This application corresponds to Figure 2A and Figure 2B are the schematic diagrams of the light leakage positions of the display devices shown. Compared with the related art, this application sets the height H1 of the part of the border component 101 in the corner area AA to be greater than the height H2 of the part of the border component 101 in other areas BB, that is, the part of the backlight module 1 in the corner area AA is warped towards the light-emitting surface 10a side relative to the part of the backlight module 1 in other areas BB. With this setting, when the backlight module 1 is bent, the position where stress concentration occurs can be controlled in the corner area AA. As Figure 3B shown, according to the foregoing content, the light leakage position G' of the display device is concentrated at the position where stress is generated. That is, the above structural design can concentrate the bending stress in the corner area AA. Among them, since the area where the corner area AA is located includes the border corner 22, that is to say, the position of the corner area AA corresponding to the border corner 22 belongs to the non-display area, while Figure 3A in, the bending stress is mostly concentrated in the middle position of the display area, that is, the light leakage position G is in the central area. Under the dark state condition of the curved display device, the light leakage is more obvious. By adopting the above structural setting in this application, the light leakage area of the curved liquid crystal display device can be greatly reduced, the light leakage problem of the curved display device under the dark state condition can be improved, the contrast of the curved display device under the dark state condition can be enhanced, and the user experience can be enhanced.

[0084] It should be noted that the above-mentioned corner area AA is a bending stress concentration area. Since the light leakage position of the display device is concentrated at the position where stress is generated, that is to say, the corner area AA is the area where light leakage occurs. Correspondingly, the other area BB is the non-light leakage area of the display device.

[0085] The following embodiments introduce the improvements made to the specific structure of the frame assembly 101 in order to make the stress generated by the backlight module 10 in the bent state concentrate in the corner area, reduce the light leakage area of the curved display device.

[0086] In some embodiments, referring to Figure 4B , the frame 21 includes a first part 211 and a second part 212. The dimension s1 of the frame corner 22 along the first direction X is greater than the dimension s2 of the second part 212 of the frame 21 along the first direction X; wherein, the first direction X is the thickness direction of the backlight module 10, the first part 211 is the part of the frame that forms the frame corner 22, and the second part 212 is the part of the frame 21 other than the first part 211.

[0087] Exemplarily, referring to Figure 4B , Figure 4B The shown glue frame is a partial enlarged view of the glue frame. According to Figure 4B , it can be seen that the frame corner 22 of the glue frame 2 is formed by enclosing two adjacent frames 21, and the frame corner 22 is located in the corner area AA. The dimension s1 of the frame corner 22 along the first direction X is greater than the dimension s2 of the frame 21 along the first direction X, while Figure 4A is a partial enlarged view of the glue frame in the related art. It can be seen from the figure that the dimension of the glue frame 2 in the first direction X is the same everywhere. The Figure 4B of the present application Figure 4A compared with the

[0088] in the related art, the dimension s1 of the frame corner 22 of the glue frame 2 along the first direction X increases. That is to say, in the backlight module 10, the height of the part of the backlight module 10 corresponding to the frame corner 22 is higher than other parts. That is, the above structure can make the part of the backlight module 10 corresponding to the frame corner 22 more warped relative to other parts, so that the stress generated by the backlight module in the bent state is more concentrated. Since the frame corner 22 is located in the corner area AA, therefore, the stress generated by the backlight module 10 in the bent state is more concentrated in the corner area AA, thereby reducing the light leakage area of the curved display device.

[0089] In some embodiments, referring to Figure 5 , a convex structure 23 is provided on the side of the frame corner 22 close to the light-emitting surface 10a.

[0090] Exemplarily, referring to Figure 5 , the material of the convex structure 23 can be foam adhesive or other plastic materials, which is not limited herein. When the material of the convex structure 23 is foam adhesive, due to its adhesiveness, the convex structure 23 can be directly attached to the frame corner 22.

[0091] It can be understood that, referring to Figure 5 and in combination with Figure 2B , the above setting of the convex structure 23 can also make the height H1 of the part of the frame assembly 101 of the backlight module 10 located in the corner area AA greater than the height H2 of the part of the frame assembly 101 located in other areas BB. That is to say, the part of the backlight module 10 located in the corner area AA warps towards the light-emitting surface 10a side relative to the part located in other areas BB, so that the stress of the backlight module 10 in the bent state is more concentrated in the corner area AA, thereby reducing the light leakage area of the curved display device.

[0092] In some embodiments, referring to Figure 6 , the back plate 1 includes a bottom plate 11, a plurality of side plates 12 and a plurality of connecting parts 13 connected to the bottom plate 11. The connecting parts 13 are connected to the top corner positions of the bottom plate 11, and both sides of the connecting parts 13 are connected to adjacent two side plates 12; the dimension s3 of the part 121 of the side plate 12 close to the frame corner 22 along the first direction X is greater than the dimension s4 of the part 122 of the side plate 12 away from the frame corner 22 along the first direction X.

[0093] Exemplarily, as Figure 6 shown, the back plate 1 includes a bottom plate 11 and four side plates 12 arranged perpendicular to the bottom plate 11. Figure 6 Only a part of the back plate 1 is schematically shown in Figure 6 shown, and the structures of the remaining areas are all referred to Figure 6 shown. Among them, the four side plates 12 enclose a frame shape, and a connecting part 13 is arranged between adjacent two side plates 12. The connecting part 13 is connected to both the side plate 12 and the bottom plate 11. The dimension of the connecting part 13 in the first direction is smaller than the dimension of the side plate 12 in the first direction X. The setting of the connecting part 13 is used for mating connection with other components in the display device.

[0094] It should be noted that Figure 6 in combination with Figure 2B, the dimension s3 of the portion 121 of the side plate 12 close to the frame corner 22 along the first direction X is greater than the dimension s4 of the portion 122 of the side plate 12 away from the frame corner 22 along the first direction X. Since the frame corner 22 is located in the corner area AA, that is to say, the portion 121 of the side plate 12 close to the frame corner 22 can be located within the corner area AA, and the portion 122 of the side plate 12 away from the frame corner 22 can be located in the other area BB. That is, the dimension s3 of the portion 121 of the side plate 12 located in the corner area AA along the first direction X is greater than the dimension s4 of the portion 122 of the side plate 12 located in the other area BB along the first direction X. With this setting, the height H1 of the portion of the frame assembly 101 of the backlight module 10 located in the corner area AA can be made greater than the height H2 of the portion of the frame assembly 101 located in the other area BB, so that the portion of the backlight module 10 located in the corner area AA warps towards the light-emitting surface 10a side relative to the portion located in the other area BB, thereby concentrating the stress of the backlight module 10 in the bent state more on the corner area AA, and further reducing the light leakage area of the curved display device.

[0095] In some embodiments, referring to Figure 7A and Figure 7B in combination with Figure 2A , the back plate 1 is arc-shaped, and along the direction from the center of the back plate 1 to the edge, the back plate 1 bends towards the light-emitting surface 10a; as Figure 7B shown, the bottom plate 11 includes adjacent first side 111 and second side 112. Among them, in a plane parallel to the bottom plate 11, the extending direction of the first side 111 is the second direction Y, and the extending direction of the second side 112 is the third direction Z. The second direction Y and the third direction Z intersect. The back plate 2 has a first curvature in the second direction Y and a second curvature in the third direction Z.

[0096] Exemplarily, referring to Figures 7A - 7C , the bottom plate of the back plate 1 is rectangular, and the back plate 1 has a long axis O2 and a short axis O1. Figure 7A The side view structure diagram of the back plate 1 shown in Figure 7A is the side view structure diagram of the side where the short axis O1 is located. According to Figure 7C , it can be obtained that the back plate 1 is arc-shaped in the direction where the short axis O1 is located, and along the direction from the center of the back plate 1 to the edges on both sides of the short axis O1, the back plate 1 bends towards the light-emitting surface 10a. Figure 7C The side view structure diagram of the back plate 1 shown in Figure 7B, the bottom plate 11 includes adjacent first and second side edges 111 and 112. For example, the first side plate 111 is the long side of the bottom plate 11, and the second side plate 112 is the short side of the bottom plate 11. The second direction Y and the third direction Z are perpendicular. The back plate 2 has a first curvature in the long side extension direction and a second curvature in the short side extension direction. That is, the back plate 2 is arc-shaped in both the second direction Y and the third direction Z. Among them, the first curvature may be equal to the second curvature.

[0097] It should be noted that the back plate 1 in the present application is arc-shaped in both the second direction Y and the third direction Z. Compared with the related art, referring to Figure 1A , Figure 1A , it can be seen that the back plate is only arc-shaped in the second direction Y. The back plate 1 of the present application is simultaneously set as an arc-shaped structure in different directions compared with the related art. For example, the back plate 1 is overall bowl-shaped, which can make the part of the back plate 1 located in the corner area AA bend more towards the light-emitting surface 10a side, which is beneficial to make the stress of the backlight module 10 more concentrated in the corner area AA in the bent state, thereby reducing the light leakage area of the curved display device.

[0098] In some embodiments, as Figure 2B shown, the glue frame 2 is frame-shaped, and a plurality of side plates 12 and a plurality of connecting parts 13 of the back plate 1 enclose a frame shape, and a plurality of frame edges 21 of the glue frame 2 are arranged on the periphery of the plurality of side plates 12 and the plurality of connecting parts 13 of the back plate 1. Referring to Figures 8A - 8C , a plurality of protruding parts 123 are arranged on the side plate 12, and a plurality of fixing holes 24 are arranged on the glue frame 2. The plurality of protruding parts 123 of the back plate 1 and the plurality of fixing holes 24 of the glue frame 2 correspond to each other and are snap-connected; among the multiple groups of mutually connected protruding parts 123 and fixing holes 24, the gap d1 between the protruding part 123 and the fixing hole 24 close to the corner area AA is greater than the gap d2 between the protruding part 123 and the fixing hole 24 far from the corner area AA.

[0099] Exemplarily, referring to Figures 8A - 8C , where Figure 8B is Figure 8A the enlarged structure diagram at F1, Figure 8C is Figure 8A the enlarged structure diagram at F2. Combining Figure 5 , Figure 6, a plurality of protruding portions 123 are arranged at intervals on the side plate 12, and a plurality of fixing holes 24 are arranged on the rubber frame 2. Among them, the number of the protruding portions 123 is the same as that of the fixing holes 24 and they are connected in one-to-one correspondence. The connection between the rubber frame 2 and the back plate 1 is realized through the protruding portions 123 and the fixing holes 24. The gap d1 between the protruding portion 123 and the fixing hole 24 near the corner area AA is larger than the gap d2 between the protruding portion 123 and the fixing hole 24 far from the corner area AA. That is to say, the protruding portion 123 and the fixing hole 24 can just be fitted and connected near the corner area AA, and even there is looseness. There is a margin for relative up-and-down movement between the protruding portion 123 and the fixing hole 24, while the protruding portion 123 and the fixing hole 24 can be tightly fitted in the part far from the corner area AA, for example, just snapped together and not easy to loosen. Such a setting can enable the backlight module 10 to be attached to the liquid crystal display panel when in a bent state, as Figure 2B shown, the display panel 20 is connected to the rubber frame 2, and the backlight module 10 will generate a bonding stress on the side of the light-emitting surface 10a. Thus, under the action of the stress, the fixing hole 24 near the corner area AA in the rubber frame will move closer to the light-emitting surface 10a side, so that the lower edge of the fixing hole 24 corresponding to it is closely attached to the protruding portion 123, and further the part of the back plate 1 located in the corner area AA bends more towards the light-emitting surface 10a side, which is beneficial to concentrating the stress of the backlight module 10 in the bent state more on the corner area AA, and further reducing the light leakage area of the curved display device.

[0100] It should be noted that the structural improvements made to the frame assembly 101 of the backlight module in the above embodiments can be combined with different embodiments. For example, a convex structure 23 on the side of the frame corner 22 close to the light-emitting surface 10a is set at the same time, and the dimension s3 of the part 121 of the side plate 12 close to the frame corner 22 along the first direction X is larger than the dimension s4 of the part 122 of the side plate 12 far from the frame corner 22 along the first direction X, so as to enhance the warping degree of the part of the backlight module located in the corner area AA relative to the part located in other areas BB towards the light-emitting surface 10a side, making the stress generated by the backlight module 10 in the bent state more concentrated on the corner area AA, and further achieving the effect of further reducing the light leakage area of the curved display device.

[0101] In some embodiments, the light transmittance of the corner area AA is less than that of other areas BB.

[0102] It should be noted that setting the light transmittance of the corner area AA to be less than that of other areas BB means that the light emission amount in the corner area AA is less than the light emission amount in other areas BB. In this way, when the display device is in a dark state, light leakage can be improved, and further the display effect of the display device can be enhanced.

[0103] The following introduces the specific implementation manner in which the light transmittance of the corner area AA is less than that of other areas BB.

[0104] In some embodiments, as Figure 2B shown, the light-emitting component 102 includes a light guide plate 3, a reflective sheet 4, and a multi-layer optical film 5. The light guide plate 3 is disposed on one side of the backplane 1 close to the light-emitting surface 10a; the reflective sheet 4 is disposed on one side of the light guide plate 3 close to the backplane 1; the multi-layer optical film 5 is disposed on one side of the light guide plate 3 away from the backplane 1; wherein, at least one optical film 5 in the multi-layer optical film 5, and / or one side surface of the light guide plate 3 and / or the reflective sheet 4 close to the backplane 1 are arranged with a first dot pattern 6 and a second dot pattern 7. Referring to Figure 9 , wherein, the first dot pattern 6 is located in the corner area AA, the second dot pattern 7 is located in the other area BB, and the density of the first dot pattern 6 is less than the density of the second dot pattern 7.

[0105] It should be noted that the density of the first dot pattern 6 distributed in the corner area AA refers to the number of the first dot patterns 6 distributed per unit area at any position within the corner area AA. Correspondingly, the density of the second dot pattern 7 distributed in the other area BB refers to the number of the second dot patterns 7 distributed per unit area at any position within the other area BB.

[0106] Exemplarily, Figure 9 the first dot pattern 6 and the second dot pattern 7 are introduced by taking the light guide plate 3 as an example. As Figure 9 shown, after the light emitted by the light source 8 enters the light guide plate 3 from the side, the incident light can be reflected multiple times between the first plate surface B1 and the second plate surface B2 of the light guide plate 3. Among them, the second plate surface B2 is farther from the backplane than the first plate surface B1. In the present application, a plurality of first dot patterns 6 and a plurality of second dot patterns 7 can both be disposed on the first plate surface B1 of the light guide plate 3. In this way, both the first dot pattern 6 and the second dot pattern 7 can reflect part of the light incident on the first plate surface B1 out of the light guide plate 3, so that the light emitted by the light source 8 can exit from the second plate surface B2 of the light guide plate 3. That is to say, a plurality of first dot patterns 6 and a plurality of second dot patterns 7 can prevent total reflection of light, change the light-emitting path, so that the light entering the light guide plate 3 is diffusely reflected and exits from the second plate surface B2 of the light guide plate 3. The light reflected by the plurality of first dot patterns 6 in the light emitted by the light source 8 is used to be incident on the corner area AA, and the light reflected by the plurality of second dot patterns 7 in the light emitted by the light source 8 is used to be incident on the other area BB. According to the above density setting, the density of the first dot pattern 6 is less than the density of the second dot pattern 7, and it can be obtained that the luminous flux of the light exiting from the first dot pattern 6 in the corner area AA is less than the luminous flux of the light exiting from the second dot pattern 7 in the other area BB.

[0107] The above-mentioned first light point 6 and second light point 7 can be disposed on any one or several layers of the multi-layer optical film 5, the light guide plate 3, and the reflective sheet 4, and are all disposed on the surface close to the back plate 1. In this way, it can further ensure that the luminous flux of the light emitted from the first light point 6 by the light in the corner area AA is less than the luminous flux of the light emitted from the second light point 7 by the light in other areas BB, that is, the brightness of the display device in the corner area AA is darker than that in other areas BB, thereby improving the problem of light leakage of the display device under dark conditions, enhancing the light contrast, and improving the display effect.

[0108] Exemplarily, the material of the light guide plate 3 is, for example, a resin material. Further, the material of the light guide plate 3 is, for example, PMMA (Polymethyl Methacrylate), MS (Methyl Methacrylate-Styrene Copolymer), Senonor (a thermoplastic resin of cycloolefin), or PC (polycarbonate).

[0109] In some embodiments, as Figure 10 shown, a plurality of first microstructures 31 arranged in an array are provided on the surface of the light guide plate 3 away from the back plate 1. The plurality of first microstructures 31 are located in other areas BB, and the plurality of first microstructures 31 are configured to change the propagation direction of at least a part of the light emitted from the surface of the light guide plate 3 away from the back plate 1.

[0110] Exemplarily, referring to Figure 10 , a first microstructure 31 is formed on one side of the second plate surface B2 of the light guide plate 3. The first microstructure 31 is used to change the propagation direction of at least a part of the light emitted from the surface of the light guide plate 3 away from the back plate 1, so that the light emitted from the surface of the light guide plate 3 away from the back plate 1 through the first microstructure 31 is more concentrated, and the first microstructure 31 has a light collecting effect. Further, the first microstructure 31 on one side of the second plate surface B2 of the light guide plate 3 is, for example, in the shape of a triangular pyramid. By providing a plurality of microstructures 31, the concavity and convexity of the second plate surface B2 of the light guide plate 3 are increased, so that after the light is incident on the first microstructure 31, there are more reflection angles. For example, as Figure 10 shown, after a part of the light is incident on the first microstructure 31, total internal reflection will occur, and the light after total internal reflection can be recycled again, or after a part of the light is emitted from the first microstructure 31, it enters the adjacent first microstructure 31 again to reflect or refract again, which can reduce the light loss, and then increase the light output amount of the part of the light guide plate 3 in other areas BB from the second plate surface B2, increase the light utilization rate, improve the light extraction efficiency, and enhance the display effect.

[0111] It should be noted that the above-mentioned first microstructure 31 being disposed on the surface of the light guide plate 3 away from the back plate 1 is only an example. In some embodiments, the first microstructure 31 can also be disposed on the surface of any layer of the light-emitting component 102 in the other area BB away from the back plate 1 to improve the display effect.

[0112] In some embodiments, as Figure 11 shown, a plurality of prism structures 32 arranged in an array are provided inside the surface of the light guide plate 3 away from the back plate 1. The plurality of prism structures 32 are located in the corner area AA, and the plurality of prism structures 32 are configured to change the propagation direction of at least a part of the light rays incident on the surface of the light guide plate 3 away from the back plate 1.

[0113] Exemplarily, referring to Figure 11 , a plurality of prism structures 32 are formed inside the second plate surface B2 of the light guide plate 3. The plurality of prism structures 32 are used to change the propagation direction of at least a part of the light rays incident on the surface of the light guide plate 3 away from the back plate 1, so that the surface of the light guide plate 3 away from the back plate 1 is more divergent, and has the function of refracting the light rays multiple times, thereby reducing the light output amount. Further, the plurality of prism structures 32 on the side of the second plate surface B2 of the light guide plate 3 are, for example, triangular prisms. By providing the plurality of prism structures 32, the unevenness inside the second plate surface B2 of the light guide plate 3 is increased, so that after the light rays are incident on the prism structures 32, the refraction angles are more, thereby reducing the light output amount of the part of the light guide plate 3 in the corner area AA from the second plate surface B2, and effectively reducing light leakage.

[0114] The above-mentioned prism structures 32 being disposed inside the surface of the light guide plate 3 away from the back plate 1 is only an example. In some embodiments, the prism structures 32 can also be disposed inside the surface of any layer of the light-emitting component 102 in the corner area AA away from the back plate 1 to improve the display effect.

[0115] In some embodiments, referring to Figure 9 , a first material is provided inside the first dot 6 and the second dot 7. Among them, the refractive index of the first material in the first dot 6 is higher than the refractive index of the first material in the second dot 7.

[0116] Exemplarily, the first material is, for example, PMMA (Polymethyl Methacrylate), and the refractive index of PMMA can be controlled by adjusting the molecular weight within PMMA. The refractive index of the first material located within the first dot 6 is set to be higher than that of the first material located within the second dot 7. The main purpose is to enable the light rays incident on the first dot 6 to undergo multiple refractions, thereby reducing the light output, and thus improving the light leakage phenomenon. The light rays incident on the second dot 7 can reduce refraction, thereby increasing the light output and enhancing the light emission brightness of other regions BB, enhancing the display effect.

[0117] It should be noted that the processes for forming the first dot 6 and the second dot 7 can be, for example, laser and hot pressing. After laser and hot pressing, the above-mentioned first material is filled into the channels after laser and hot pressing to form the first dot 6 and the second dot 7 filled with the first material inside.

[0118] In some embodiments, with continued reference to Figure 9 , in the corner region AA, an absorbing ink M1 is provided on the surface of the light guide plate 3 close to the back plate 1, and in other regions BB, a reflective ink M2 is provided on the surface of the light guide plate 3 close to the back plate 1.

[0119] Exemplarily, the first dot 6 and the second dot 7 on the light guide plate 3 are printed dots printed on the second plate surface B2 of the light guide plate 3 in a printing manner after the light guide plate 3 has completed its contour processing. Further, the first dot 6 and the second dot 7 printed on the second plate surface B2 of the light guide plate 3 can be printed using ink. That is to say, when the above-mentioned first dot 6 and the second dot 7 are printed dots, the absorbing ink M1 and the reflective ink M2 can be printed synchronously during the process of forming the first dot 6 and the second dot 7.

[0120] Exemplarily, the first dot 6 and the second dot 7 on the light guide plate 3 are non-printed dots directly formed on the second plate surface B2 of the light guide plate 3 when the light guide plate 3 is being formed. Further, for example, using chemical etching, precision machining, photolithography, and internal diffusion methods, when the contour of the light guide plate 3 is being processed, the first dot 6 and the second dot 7 are directly formed on the second plate surface B2 of the light guide plate 3. That is to say, when the first dot 6 and the second dot 7 are non-printed dots, the absorbing ink M1 and the reflective ink M2 can be directly printed on the surface of the light guide plate 3 close to the back plate 1.

[0121] It should be noted that the light-absorbing ink M1 can be an opaque ink, and the reflective ink M2 is printed with, for example, a heat-drying ink or a UV (ultraviolet light-curing) ink. Among them, the second plate surface B2 of the light guide plate 3 located in the corner area AA is provided with the light-absorbing ink, which can greatly absorb the light rays incident on the second plate surface B2 of the light guide plate 3, reduce the light flux, and thus achieve the effect of improving light leakage. The second plate surface B2 of the light guide plate 3 located in other areas BB is provided with the reflective ink, which can reflect the light rays incident on the second plate surface B2 of the light guide plate 3, direct them to the second dot 7, and after passing through the second dot 7, the light rays are diverged and emitted, thereby improving the utilization rate of the light rays, increasing the light output efficiency, and further enhancing the display effect.

[0122] In some embodiments, referring to Figure 12 , a plurality of light-passing holes 41 are provided in the part of the reflecting sheet 4 located in the corner area AA.

[0123] Exemplarily, as Figure 12 shown, Figure 12 a plurality of light-passing holes 41 are provided in the part of the reflecting sheet 4 located in the corner area AA as shown in Figure 12 . The shape of the light-passing holes 41 shown in Figure 2A is circular. Here, this is only an example, and the present application does not limit the shape of the light-passing holes 41. By providing the light-passing holes 41, the reflected light rays located in the corner area AA can be reduced. That is to say, when the light rays in the corner area AA are incident on the reflecting sheet 4, due to the existence of the light-passing holes 41, reflection will not occur, and the light rays reflected by the reflecting sheet 4 can be reduced. Combining Figure 2A , the light output amount on the light-emitting surface 10a side of the backlight module 10 can be reduced, and thus the effect of reducing and improving light leakage can be achieved.

[0124] In some embodiments, referring to Figure 13A , Figure 13B and combining with Figure 2B at the same time, the orthographic projection of the reflecting sheet 4 on the back plate 1 is located within the orthographic projection of the light guide plate 3 on the back plate 1, and in the corner area AA, the orthographic projection of the reflecting sheet 4 on the back plate 1 and the orthographic projection of the light guide plate 3 on the back plate 1 do not overlap.

[0125] Exemplarily, referring to Figure 13A , Figure 13A the reflecting sheet shown in Figure 14 is the initial reflecting sheet 4', Figure 13A which is the reflecting sheet obtained by cutting the shaded part in Figure 13A . Among them, Figure 13B the cutting shape shown in Figure 13A and Figure 13B is triangular. Here, this is only an example, and the cutting shape can also be the contour shape of the corner area AA. The present application does not limit the cutting shape of the part of the reflecting sheet located in the corner area AA.

[0126] By cutting the initial reflective sheet 4', the shape of the obtained reflective sheet 4 can be, for example, a polygon. For example, the cutting shape is the contour of the corner area AA, that is, all the parts of the initial reflective sheet 4' located in the corner area AA are cut. In this way, the corners of the obtained reflective sheet 4 can be arc-shaped, and there will be no reflected light in the corner area AA. That is to say, the light from the light source directed to the corner area AA will not be reflected by the reflective sheet 4, that is, this part of the light will not be emitted from the backlight module. Combining Figure 2A overall, it is possible to reduce the light emission amount on the light-emitting surface 10a side of the backlight module 10, thereby achieving the effect of reducing and improving light leakage.

[0127] In some embodiments, referring to Figure 2B in the corner area AA, an absorbing ink is provided on the surface of the reflective sheet 4 close to the back plate 1, and in the other area BB, a reflective ink is provided on the surface of the reflective sheet 4 close to the back plate 1.

[0128] It should be noted that an absorbing ink is provided on the surface of the reflective sheet 4 close to the back plate 1. The absorbing ink can be an opaque ink. The reflective ink is, for example, printed with a heat-drying ink or a UV (ultraviolet light-curing) ink. Among them, providing an absorbing ink on the surface of the reflective sheet 4 in the corner area AA close to the back plate 1 can greatly absorb the light directed to the surface of the reflective sheet 4 close to the back plate 1, reduce the light flux, and thus achieve the effect of improving light leakage. And providing a reflective ink on the surface of the reflective sheet 4 in the other area BB close to the back plate 1 can enhance the reflection of the light directed to the surface of the reflective sheet 4 close to the back plate 1, thereby improving the utilization rate of light and the light-emitting efficiency, and further enhancing the display effect.

[0129] In some embodiments, referring to Figure 14 Combining Figure 2B at least one layer of the multi-layer optical film 5 is provided with a plurality of second microstructures 51 arranged in an array on the surface away from the light guide plate 3. The plurality of second microstructures 51 are located in the other area AA, and the plurality of second microstructures 51 are configured to change the propagation direction of at least a part of the light emitted from the optical film 5.

[0130] Exemplarily, the beneficial effects of the above-mentioned setting of the second microstructures 51 refer to the beneficial effects of the foregoing first microstructures 31, which will not be elaborated here one by one.

[0131] In some embodiments, referring to Figure 14 Combining Figure 2B in the corner area AA, an absorbing ink is provided on the surface of at least one layer of the multi-layer optical film 5 close to the back plate 1, and in the other area BB, a reflective ink is provided on the surface of at least one layer of the multi-layer optical film 5 close to the back plate 1.

[0132] Exemplarily, the beneficial effects of the above-mentioned light-absorbing ink in the corner area AA and the reflective ink in other areas BB refer to the beneficial effects of the aforementioned light-absorbing ink and reflective ink, which will not be elaborated here one by one.

[0133] In some embodiments, referring to Figure 15 , the multi-layer optical film 5 includes a reflective brightness enhancement film 52. Among them, in other areas BB, a brightness enhancement layer 521 is provided inside the reflective brightness enhancement film 52, and the refractive index of the part of the reflective brightness enhancement film 52 in the corner area AA is higher than that of the part of the reflective brightness enhancement film 52 in other areas BB.

[0134] Exemplarily, referring to Figure 15 Combined with Figure 9 , the reflective brightness enhancement film 52 is, for example, a prism sheet, which is used to concentrate the light emitted from the second plate surface B2 of the light guide plate 3 within a certain angular range for emission, thereby improving the display brightness of the display device.

[0135] Exemplarily, the reflective brightness enhancement film 52 includes a first substrate 522 and a second substrate 523 stacked, and a brightness enhancement layer 521 located between the first substrate 522 and the second substrate 523. Among them, the brightness enhancement layer 521 is only located in other areas BB. As a possible structure, the brightness enhancement layer 521 may include a fixed substrate and a plurality of protrusions provided on the fixed substrate. The cross-sectional shapes of the plurality of protrusions are, for example, overlapping prism shapes. Further, the materials of the first substrate 522, the second substrate 523, and the fixed substrate are, for example, PET (Polyethylene terephthalate, polyethylene terephthalate, commonly known as polyester resin) materials, and the plurality of protrusions are, for example, acrylic resins.

[0136] Exemplarily, the refractive index of the part of the above-mentioned reflective brightness enhancement film 52 in the corner area AA is higher than that of the part of the reflective brightness enhancement film 52 in other areas BB because a brightness enhancement layer 521 is provided in other areas BB relative to the corner area AA. The brightness enhancement layer 521 can be stacked with materials of different refractive indexes, that is, stacked at intervals of one layer with a low refractive index and one layer with a high refractive index. In this way, the brightness enhancement layer 521 has the effect of reflecting and enhancing brightness. At the same time, the brightness enhancement layer 521 can transmit the polarized light parallel to its polarization axis and reflect the polarized light perpendicular to its polarization axis. The reflected polarized light is depolarized by the backlight system and then reused, which improves the brightness of the light source as a whole. That is to say, the light output in other areas BB increases and the brightness is improved compared with the corner area AA. Therefore, the brightness enhancement layer 521 is not provided in the corner area AA and the refractive index is high, and the light emitted from the second plate surface B2 of the light guide plate 3 can be refracted multiple times, which plays a role in reducing the light output in the corner area AA, and then reduces the brightness, achieving the effect of reducing and improving light leakage.

[0137] In some embodiments, such as Figure 16As shown, the multi-layer optical film 5 further includes a prism sheet 55 and a diffusion sheet 56. Among them, the prism sheet 55 utilizes the laws of total reflection and refraction to concentrate the scattered light and emit it within a certain angular range, thereby increasing the brightness within this range. Exemplarily, the prism sheet 55 can be disposed only in the other area BB to increase the brightness of the light in the other area BB and enhance the display effect. The diffusion sheet 56 has a relatively high light transmittance, and after the light passes through the diffusion sheet 56, refraction, reflection, and scattering will occur, which can achieve the effect of optical diffusion and at the same time has the function of uniform light.

[0138] Referring to Figure 2B , an embodiment of the present disclosure further provides a display module 100. The display module 100 includes the backlight module 10 provided in any of the above embodiments. The backlight module 10 is used to emit light and provide a backlight source. Therefore, the display module 100 provided by the present utility model has all the beneficial effects of the backlight module 10 provided in any of the above embodiments, which will not be elaborated herein.

[0139] The display module 100 further includes a display panel 20. The display panel 20 is disposed on the backlight module 10. The display panel 20 is connected to the glue frame of the backlight module 10. The display panel 20 is used to display the picture to be displayed.

[0140] Exemplarily, a glue layer 9 is provided between the display panel 20 and the glue frame 2 of the backlight module 10. The glue layer 9 connects the display panel 20 and the backlight module 10, and the display panel 20 has no contact with the light-emitting component.

[0141] Referring to Figure 2B , the frame assembly 101 of the above backlight module 10 further includes a middle frame 24. The middle frame 24 is disposed between the back plate 1 and the glue frame 2. Among them, the middle frame 24 has the functions of receiving and buffering. Specifically, the middle frame 24 can receive the components disposed above it, such as the light-emitting component 102. At the same time, the middle frame 24 plays a good protective role for the light guide plate 3 during impacts and vibrations; the middle frame 24 is disposed between the back plate 1 and the glue frame 2, which can play a role in fixing the glue frame 2 and has a certain limiting effect.

[0142] Some embodiments of the present disclosure provide a display device 1000, such as Figure 17 shown. The display device can be, for example, a mobile phone, a tablet computer, a personal digital assistant (Personal Digital Assistant, abbreviated as PDA), an in-vehicle computer, a wearable display device, etc. The specific form of the above display device is not particularly limited in the embodiments of the present disclosure. As Figure 17As shown, the display device 1000 includes the display module 100 provided in any of the above embodiments. The display module 100 includes a display side 100a and a non-display side 100b. Therefore, the display device 1000 provided by the present utility model has all the beneficial effects of the display panel 100 provided in any of the above embodiments, which will not be elaborated herein.

[0143] Exemplarily, as Figure 17 shown, the display device 1000 in the embodiments of the present disclosure is exemplified by a liquid crystal display device. Referring to Figure 17 , in some embodiments, the main structure of the liquid crystal display device 1000 includes a display module 100 and a driving circuit board 200. Among them, the display module 100 includes a backlight module 10 and a display panel 20 arranged in a stacked manner. Among them, the backlight module 10 includes a light-emitting side 10a and a backlight side 10b, and the display panel 20 is arranged on the light-emitting side 10b of the backlight module 10.

[0144] As Figure 17 shown, the driving circuit board 200 is arranged on the side of the backlight module 10 away from the display panel 20, and the driving circuit board 200 is electrically connected to the display panel 20 and the backlight module 10 respectively. The driving circuit board 200 is configured to drive the backlight module 10 and the display panel 30 to work.

[0145] Exemplarily, referring to Figure 17 , the display panel 20 includes a liquid crystal layer 203 between an array substrate 201 and a counter substrate 202. The array substrate 201 and the counter substrate 202 can be adhered together by a sealant 204, so as to confine the liquid crystal layer 203 within the area surrounded by the sealant 204.

[0146] As Figure 17 shown, some embodiments of the present disclosure provide a display device. The display device provided by the embodiments of the present disclosure can be any device that displays whether it is moving (e.g., video) or stationary (e.g., still image), and whether it is text or image. More specifically, it is expected that the embodiments can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal digital assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, video cameras, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photos, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0147] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

[0148] As mentioned above, it is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure, thinking of changes or substitutions, should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claimed rights.

Claims

1. A backlight module having a light-emitting surface and a backlight surface, characterized in that, Comprising: A border component, the border component comprising: a backplane, and a rubber frame disposed around the periphery of the backplane, the rubber frame being connected to the backplane, the rubber frame comprising a plurality of borders, the plurality of borders enclosing a frame shape, and adjacent two borders being connected to form a border corner; A light-emitting component, the light-emitting component being disposed within the border component and on the side of the backplane close to the light-emitting surface; The backlight module comprises a corner area and other areas, the border corner being located in the corner area, wherein the height of the part of the border component located in the corner area is greater than the height of the part of the border component located in the other areas.

2. The backlight module according to claim 1, characterized in that, The border comprises a first part and a second part, the size of the border corner in the first direction being greater than the size of the border in the first direction; the first direction is the thickness direction of the backlight module, the first part being the part of the border that forms the border corner, and the second part being the part of the border other than the first part.

3. The backlight module according to claim 1, wherein A convex structure is provided on the side of the border corner close to the light-emitting surface.

4. The backlight module according to claim 1, wherein, The backplane comprises a bottom plate, as well as a plurality of side plates and a plurality of connecting parts connected to the bottom plate, the connecting parts being connected to the top corner positions of the bottom plate, and both sides of the connecting parts being connected to adjacent two of the side plates; The size of the part of the side plate close to the border corner in the first direction is greater than the size of the part of the side plate away from the border corner in the first direction.

5. The backlight module according to claim 4, wherein The backplane is arc-shaped, and along the direction from the center of the backplane to the edge, the backplane bends towards the light-emitting surface; The bottom plate comprises adjacent first and second side edges. Among them, in a plane parallel to the bottom plate, the extending direction of the first side edge is the second direction, the extending direction of the second side edge is the third direction, the second direction and the third direction intersect, the backplane has a first curvature in the second direction and a second curvature in the third direction.

6. The backlight module according to claim 4, characterized in that A plurality of protruding parts are provided on the side plates, a plurality of fixing holes are provided on the rubber frame, and the plurality of protruding parts on the backplane respectively correspond to and are snap-connected to the plurality of fixing holes on the rubber frame; Among the multiple groups of interconnected protruding parts and fixing holes, the gap between the protruding parts and the fixing holes close to the corner area is greater than the gap between the protruding parts and the fixing holes away from the corner area.

7. The backlight module according to any one of claims 1 to 6, characterized in that The light transmittance of the corner area is less than the light transmittance of the other areas.

8. The backlight module according to claim 7, wherein The light-emitting component comprises: A light guide plate, the light guide plate being disposed on the side of the backplane close to the light-emitting surface; A reflective sheet, the reflective sheet being disposed on the side of the light guide plate close to the backplane; A multi-layer optical film, the multi-layer optical film being disposed on the side of the light guide plate away from the backplane; Wherein, at least one optical film in the multi-layer optical film, and / or the surface of the light guide plate, and / or the side of the reflective sheet close to the backplane are arranged with first dots and second dots, wherein the first dots are located in the corner area, the second dots are located in the other areas, and the density of the first dots is less than the density of the second dots.

9. The backlight module according to claim 8, wherein, A plurality of first microstructures arranged in an array are provided on a surface of the light guide plate away from the back plate, and the plurality of first microstructures are located in the other area. The plurality of first microstructures are configured to change the propagation direction of at least a part of the light emitted from the surface of the light guide plate away from the back plate.

10. The backlight module according to claim 8, wherein, A plurality of prism structures arranged in an array are provided inside a surface of the light guide plate away from the back plate, and the plurality of prism structures are located in the corner area. The plurality of prism structures are configured to change the propagation direction of at least a part of the light incident on the surface of the light guide plate away from the back plate.

11. The backlight module according to claim 8, wherein, A first material is provided inside the first dot and the second dot. Among them, the refractive index of the first material in the first dot is higher than the refractive index of the first material in the second dot.

12. The backlight module according to claim 8, wherein In the corner area, an absorbing ink is provided on a surface of the light guide plate close to the back plate, and in the other area, a reflective ink is provided on a surface of the light guide plate close to the back plate.

13. The backlight module according to any one of claims 8 to 12, characterized in that, A plurality of light-passing holes are provided in a part of the reflective sheet located in the corner area.

14. The backlight module according to claim 13, characterized in that, The orthographic projection of the reflective sheet on the back plate is located within the orthographic projection of the light guide plate on the back plate, and in the corner area, the orthographic projection of the reflective sheet on the back plate does not overlap with the orthographic projection of the light guide plate on the back plate.

15. The backlight module according to claim 13, wherein In the corner area, an absorbing ink is provided on a surface of the reflective sheet close to the back plate, and in the other area, a reflective ink is provided on a surface of the reflective sheet close to the back plate.

16. The backlight module according to any one of claims 8 to 12, characterized in that, A plurality of second microstructures arranged in an array are provided on a surface of at least one optical film in the multi-layer optical film away from the light guide plate, and the plurality of second microstructures are located in the other area. The plurality of second microstructures are configured to change the propagation direction of at least a part of the light emitted from the optical film.

17. The backlight module according to claim 16, wherein, In the corner area, an absorbing ink is provided on a surface of at least one optical film in the multi-layer optical film close to the back plate, and in the other area, a reflective ink is provided on a surface of at least one optical film in the multi-layer optical film close to the back plate.

18. The backlight module according to claim 16, wherein, The multi-layer optical film includes a reflective brightness enhancement film. Among them, in the other area, a brightness enhancement layer is provided inside the reflective brightness enhancement film, and the refractive index of a part of the reflective brightness enhancement film in the corner area is higher than the refractive index of a part of the reflective brightness enhancement film in the other area.

19. A display module, characterized in that, A backlight module as described in any one of claims 1 to 18, which is used to emit light and provide a backlight source; A display panel, which is disposed on the backlight module, and the display panel is connected to a rubber frame of the backlight module. The display panel is used to display a to-be-displayed picture.

20. A display device, characterized in that, A display module as described in claim 19 is included.

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