Backlight module and display device

Abstract

The present application provides a backlight module, which comprises a frame, a light-emitting substrate, a lamp cup structure and a diffusion plate. The frame has a bottom plate. The light-emitting substrate comprises a circuit board and a plurality of light-emitting elements arranged on the circuit board in an array. The circuit board is arranged on the bottom plate. The lamp cup structure is arranged on the light-emitting substrate. The lamp cup structure comprises a spacer and a support. The spacer is fixedly arranged on the circuit board and forms a plurality of hollow parts to surround corresponding light-emitting elements. The support is located on the bottom plate and connected to the periphery of the spacer to surround the circuit board. The support has a first support part. The diffusion plate is carried on the first support part. The present application also discloses a display device comprising the backlight module and a display panel arranged on the backlight module.

Description

Technical Field

[0001] The present invention relates to a backlight module and a display device using the backlight module. Background Technology

[0002] Currently, in automotive display devices, the display panel is mounted on a backlight module. The backlight module includes a frame, a diffuser plate, a lamp cup structure, and light-emitting units. The light-emitting units and lamp cup structure are located at the bottom of the frame, while the diffuser plate is supported by the frame's support surface and located above the light-emitting units and lamp cup structure. Because the frame needs to reserve sufficient space around the diffuser plate and lamp cup structure, the peripheral dimensions of the frame are increased, reducing the screen-to-body ratio of the automotive display device. Summary of the Invention

[0003] To address the above problems, this invention proposes a backlight module, the backlight module comprising:

[0004] The frame has a base plate;

[0005] A light-emitting substrate includes a circuit board and a plurality of light-emitting elements arrayed on the circuit board, wherein the circuit board is disposed on the base plate;

[0006] A lamp cup structure, wherein the lamp cup structure is disposed on the light-emitting substrate, and the lamp cup structure comprises...

[0007] Spacers are fixedly mounted on the circuit board and form multiple hollow sections to surround the corresponding light-emitting elements.

[0008] A support body, located on the base plate, and connected to the periphery of the spacer to surround the circuit board, the support body having a first support portion; and

[0009] A diffuser plate, which is supported on the first support portion.

[0010] In one embodiment of the backlight module of the present invention, a first sidewall of the first support portion is opposite to a second sidewall of the circuit board and has a first interval g1, the first interval g1 corresponding to the size of the second sidewall.

[0011] In one embodiment of the backlight module of the present invention, the support body further includes a second support portion in a stepped shape. In the thickness direction of the backlight module, the second support portion is disposed on the first support portion. A third sidewall of the second support portion is opposite to a fourth sidewall of the diffuser plate and has a second interval g2, wherein the second interval g2 is greater than the first interval g1.

[0012] In one embodiment of the backlight module of the present invention, the frame has a first side plate connected to the base plate, and a third interval g3 is provided between a fifth side wall of the first support and the first side plate, the fifth side wall being opposite to the first side wall, wherein the third interval g3 is greater than the first interval g1.

[0013] In one embodiment of the backlight module of the present invention, the first support portion further has a sixth sidewall and a first bearing surface connected to each other, the diffuser plate is supported on the first bearing surface, the sixth sidewall faces the plurality of light-emitting elements, and in the thickness direction of the backlight module, the sixth sidewall has a first dimension d1, and the spacer has a second dimension d2, wherein 0.7 < d2 / d1 < 0.9.

[0014] In one embodiment of the backlight module of the present invention, the backlight module further includes a first elastic adhesive member, the second support portion of the backlight module has the third sidewall and the second bearing surface connected to each other, the first elastic adhesive member is disposed on the second bearing surface, the first bearing surface has a third dimension d3 in a first direction, and the second bearing surface has a fourth dimension d4, wherein 0.4 < d4 / d3 < 0.6.

[0015] In one embodiment of the backlight module of the present invention, the ratio of the first interval g1 to the third dimension d3 is 0.125 < g1 / d3 < 0.3; or, the ratio of the third interval g3 to the fourth dimension d4 is 0.25 < g3 / d4 < 0.6.

[0016] In one embodiment of the backlight module of the present invention, the support body further has a third support portion, the third support portion is disposed on the fifth side wall, and the third support portion is tenon-mortise connected to the first side plate of the frame.

[0017] In one embodiment of the backlight module of the present invention, the third support portion protrudes from the fifth side wall, and the first side plate is provided with a corresponding recess. In the thickness direction of the backlight module, the size of the recess does not exceed half the size of the first side plate.

[0018] In one embodiment of the backlight module of the present invention, the support body includes a first part, a second part, a third part and a fourth part corresponding to each side of the diffuser plate. Each part includes a first support portion and a second support portion. The first support portion of the first part is adhered and fixed to the base plate. There is no adhesive layer between the circuit board, the second part, the third part and the fourth part and the base plate.

[0019] The present invention also proposes a display device comprising the aforementioned backlight module and display panel, wherein the display panel is disposed on the backlight module.

[0020] In one embodiment of the display device of the present invention, the display device further includes a cover plate and a second elastic adhesive member, the display panel is fixedly disposed on the cover plate, the frame has a third bearing surface corresponding to the periphery of the cover plate, and the second elastic adhesive member is disposed on the third bearing surface and fixedly connected to the cover plate.

[0021] In one embodiment of the display device of the present invention, the frame includes a first side plate, a second side plate, a third side plate and a fourth side plate connected to the base plate, the display panel has a wiring binding area, the side where the wiring binding area is located corresponds to the first side plate, the support body is tenon-jointed to the first side plate and is not connected to the second side plate, the third side plate and the fourth side plate.

[0022] Compared to prior art, the backlight module and display device disclosed in this invention reduce the gap between the frame, the diffuser plate, and the display panel by placing the diffuser plate on the first support part of the lamp cup structure support, thereby providing a high screen ratio of the display device.

[0023] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. Attached Figure Description

[0024] Figure 1 A cross-sectional schematic diagram of a backlight module in the prior art is shown.

[0025] Figure 2 A cross-sectional schematic diagram of a display device according to an embodiment of the present invention is shown.

[0026] Figure 3 A top view schematic diagram of a backlight module according to an embodiment of the present invention is shown.

[0027] Figure 4 Illustration of the present invention Figure 2 A partial schematic diagram of the backlight module in the embodiment.

[0028] Figure 5 A cross-sectional schematic diagram of a backlight module according to another embodiment of the present invention is shown.

[0029] Figure 6 A schematic diagram of a display device according to an embodiment of the present invention is shown.

[0030] In the attached figures, the following labels are used:

[0031] 1'、1…frame

[0032] 11', 11... base plate

[0033] 12…First side panel

[0034] 121…concave

[0035] 13…Second side panel

[0036] 14…Third side panel

[0037] 15…Fourth side panel

[0038] 2', 2... Light-emitting substrate

[0039] 21…circuit board

[0040] 22…Light-emitting elements

[0041] 3'、3… Lamp cup structure

[0042] 31…Support

[0043] 311…First Support Section

[0044] 312…Second Support Section

[0045] 313…Third Support Section

[0046] 31a…Part 1

[0047] 31b…Part Two

[0048] 31c…Part Three

[0049] 31d…Part Four

[0050] 32…spacer

[0051] 33…Openwork section

[0052] 4', 4... diffuser plate

[0053] 5… Optical films

[0054] 6… Cover plate

[0055] 7…First elastic adhesive component

[0056] 8…Second elastic adhesive component

[0057] S1…First sidewall

[0058] S2…Second sidewall

[0059] S3…Third sidewall

[0060] S4…Fourth sidewall

[0061] S5…Fifth sidewall

[0062] S6…Sixth sidewall

[0063] B1…First bearing surface

[0064] B2…Second bearing surface

[0065] B3…Third bearing surface

[0066] d1…First dimension

[0067] d2…Second size

[0068] d3…Third size

[0069] d4…Fourth size

[0070] d5… Fifth size

[0071] g1…first interval

[0072] g2…Second Interval

[0073] g3…Third Interval

[0074] 100, 200… backlight modules

[0075] 1000, 2000… display devices

[0076] x…first direction Detailed Implementation

[0077] The following specific embodiments, in conjunction with the accompanying drawings, illustrate the implementation methods disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. However, the following disclosure is not intended to limit the scope of protection of this invention. Without departing from the spirit of the invention, those skilled in the art can implement this invention with other different embodiments based on different viewpoints and applications.

[0078] For clarity, the figures shown in this invention are simplified schematic diagrams illustrating the basic structure of the invention. Therefore, the structures shown in the figures are not drawn to scale according to the actual shape and size of the implementation. For example, the dimensions of certain components have been enlarged for ease of explanation.

[0079] Furthermore, it should be understood that when a component such as a layer, film, region, or substrate is referred to as being "on" or "connected" to another component, it may be directly on or connected to the other component, or an intermediate component may also be present. Conversely, when a component is referred to as being "directly on" or "directly connected" to another component, no intermediate component exists. As used herein, "connection" can refer to physical and / or electrical connections. Moreover, "electrical connection" or "coupling" can refer to the presence of other components between the two components.

[0080] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this invention pertains. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having the same meaning as they have in the context of the relevant technology and this invention, and will not be interpreted as having an idealized or overly formal meaning unless expressly defined herein.

[0081] Furthermore, it should be understood that although the terms “first,” “second,” “third,” etc., may be used herein to describe various components, parts, regions, layers, and / or portions, these components, parts, regions, and / or portions should not be limited by these terms. These terms are used only to distinguish one component, part, region, layer, or portion from another. Therefore, the “first component,” “part,” “region,” “layer,” or “part” discussed below may be referred to as a second component, part, region, layer, or portion without departing from the teachings of this document.

[0082] It should be understood that references to "an embodiment," "embodiment," "example embodiment," etc., in the specification refer to the fact that the described embodiment may include specific features, structures, or characteristics, but does not necessarily include these specific features, structures, or characteristics. Furthermore, such expressions do not refer to the same embodiment. Moreover, when describing specific features, structures, or characteristics in conjunction with embodiments, whether or not explicitly described, it is indicated that incorporating such features, structures, or characteristics into other embodiments is within the knowledge of those skilled in the art.

[0083] The specification and subsequent claims use certain terms to refer to specific modules, components, or parts. Those skilled in the art will understand that users or manufacturers may use different names or terms to refer to the same module, component, or part. This specification and subsequent claims do not distinguish modules, components, or parts by differences in name, but rather by differences in function. The terms "comprising" and "including" used throughout the specification and subsequent claims are open-ended and should be interpreted as "including but not limited to." Furthermore, the term "connection" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connections made through other means.

[0084] Furthermore, in the following description and claims, numerous terms will be referenced, which should be defined as having the following meanings. The singular forms “a” and “the” include plural referents, unless the context clearly specifies otherwise. “Optional” or “optionally” indicates that an event or situation subsequently described may or may not occur, and the description includes both the scenario where the event occurs and the scenario where the event does not occur.

[0085] Please see Figure 1 , Figure 1 A cross-sectional schematic diagram of a backlight module in the prior art is shown. For example... Figure 1 As shown, in one embodiment of a backlight module in the prior art, a light-emitting substrate 2', a lamp cup structure 3', and a diffuser plate 4' are disposed on a frame 1', wherein the diffuser plate 4' is disposed on a stepped structure of the frame 1', the light-emitting substrate 2' is disposed on a bottom plate 11' of the frame 1', and the lamp cup structure 3' is disposed on the light-emitting substrate 2'. Considering the expansion and assembly tolerances of the periphery of the diffuser plate 4' and the lamp cup structure 3' (whose size is much smaller than the size of the barrier structure between adjacent light-emitting elements on the light-emitting substrate 2' of the lamp cup structure 3'), the frame 1' must reserve space for the periphery of the diffuser plate 4' and the lamp cup structure 3', thereby increasing the peripheral size of the frame 1' and reducing the screen-to-body ratio of the vehicle display device using this backlight module. To solve the above problem, please refer to... Figures 2 to 3 , Figure 2 A cross-sectional schematic diagram of a display device 1000 according to an embodiment of the present invention is shown. Figure 3 This diagram illustrates a top view of a backlight module 100 according to an embodiment of the present invention. The present invention proposes a backlight module 100, which includes: a frame 1, a light-emitting substrate 2, a lamp cup structure 3, and a diffuser plate 4. The frame 1 has a base plate 11; the light-emitting substrate 2 includes a circuit board 21 and a plurality of light-emitting elements 22 arrayed on the circuit board 21, the circuit board 21 being disposed on the base plate 11; the lamp cup structure 3 is disposed on the light-emitting substrate 2, the lamp cup structure 3 including a spacer 32 and a support 31, the spacer 32 being fixedly disposed on the circuit board 21 and forming a plurality of hollow portions 33 to surround the corresponding light-emitting elements 22, the support 31 being located on the base plate 11, and the support 31 being connected to the periphery of the spacer 32 to surround the circuit board 21, the support 31 having a first support portion 311; the diffuser plate 4 is supported on the first support portion 311. In one embodiment, the diffuser plate 4 is further provided with an optical film assembly (including a plurality of optical films 5) for enhancing light transmission and brightness. Furthermore, in one embodiment, the backlight module 100 is applied in the display device 1000, and the display device further includes a display panel (not shown), which is disposed on the backlight module. The display device has a cover plate 6 on the frame 1, and the aforementioned display panel can be disposed on the side of the cover plate 6 facing the backlight module. The frame 1 and the cover plate 6 can be glued and fixed together by adhesive.

[0086] In one embodiment, the first support portion 311 has a notch design corresponding to the circuit board 21 to form a first sidewall S1. The first sidewall S1 of the first support portion 311 is opposite to a second sidewall S2 of the circuit board 21 and has a first gap g1. The first gap g1 corresponds to the size of the second sidewall S2 (specifically, the size of the second sidewall S2 in the thickness of the backlight module). By setting the first gap g1, space can be provided for the thermal expansion of the circuit board 21 and for the tolerance of the circuit board 21, which facilitates assembly. In one embodiment, the first gap g1 can be 0.2mm, but is not limited thereto. In addition, the correspondence between the size of the first gap g1 and the second sidewall S2 (in the thickness direction of the backlight module 100) can be understood as the first gap g1 being equal to or less than the size of the second sidewall S2, but is not limited thereto. Furthermore, at the first gap g1, the size of the first support portion 311 in the thickness direction of the backlight module 100 is equal to or greater than the size of the second sidewall S2, further providing space for the thermal expansion of the circuit board 21 and for the tolerance of the circuit board 21, which facilitates assembly.

[0087] In one embodiment, the support 31 further includes a second support portion 312 in a stepped shape. In the thickness direction of the backlight module 100, the second support portion 312 is disposed above the first support portion 311. A third sidewall S3 of the second support portion 312 is opposite to a fourth sidewall S4 of the diffuser plate 4 and has a second gap g2, wherein the second gap g2 is larger than the first gap g1. In one embodiment, the second gap g2 can be at least twice the first gap g1, for example, 0.5 mm, but is not limited thereto. By setting the second gap g2, space can be provided for the thermal expansion of the diffuser plate 4.

[0088] In one embodiment, the frame 1 has a first side plate 12 connected to the base plate 11. A fifth side wall S5 of the first support portion 311 has a third gap g3 between it and the first side plate 12. The fifth side wall S5 is opposite to the first side wall S1 (and the third side wall S3), wherein the third gap g3 is larger than the first gap g1. In one embodiment, the third gap g3 can be at least twice the first gap g1, for example, 0.5 mm, but is not limited thereto. The third gap g3 can provide space for thermal expansion / assembly tolerance of the support 31. When the backlight module 100 is applied to the display device 1000, the third gap g3 can make the adhesive part (or the adhesive part is set on the cover plate 6 to fit the frame 1) closer to the inner side plate (i.e., inner wall) of the frame 1 when it is placed at the top periphery of the frame 1, thus reducing the peripheral thickness of the frame 1 at this location (i.e., Figure 4 The dimension (in the first direction x) is more secure when it is attached to, for example, the cover plate 6 and the adhesive will not overflow outside the cover plate 6. At the same time, the third interval g3 can serve as a receiving space, which can also accommodate the overflow of the adhesive inside the frame 1, thus increasing the degree of freedom when assembling the adhesive.

[0089] Please see Figure 4 , Figure 4 Illustration of the present invention Figure 2 A partial schematic diagram of the backlight module 100 in the embodiment. In one embodiment, the first support portion 311 also has a connected sixth sidewall S6 and a first bearing surface B1. The diffuser plate 4 is supported on the first bearing surface B1. The sixth sidewall S6 faces the plurality of light-emitting elements 22. In the thickness direction of the backlight module 100, the sixth sidewall S6 has a first dimension d1, and the spacer 32 has a second dimension d2, wherein 0.7 < d2 / d1 < 0.9. The dimensional relationship between the first dimension d1 and the second dimension d2 enables the spacer 32 to provide sufficient barrier / reflection function and sufficient light mixing space for the light emitted from the spacer 32. In one embodiment, the first dimension d1 is 3.2 mm, and the second dimension d2 is 2.4 mm. In this case, d2 / d1 = 0.75, but it is not limited to this.

[0090] Please refer to the following: Figure 2 and Figure 4 In one embodiment, the backlight module 100 further includes a first elastic adhesive member 7. The second support portion 312 of the backlight module 100 has a connected third sidewall S3 and a second bearing surface B2. The first elastic adhesive member 7 is disposed on the second bearing surface B2. In the first direction x, the first bearing surface B1 has a third dimension d3, and the second bearing surface B2 has a fourth dimension d4, wherein 0.4 < d4 / d3 < 0.6. Due to the provision of the second interval g2 and the third interval g3, assembly tolerance / expansion accommodating space is provided for the first elastic adhesive member 7 on the second bearing surface B2, reducing the attachment accuracy requirement of the first elastic adhesive member 7. The second bearing surface B2 has a smaller size (e.g., only a molding size greater than 0.8 mm is required), thus reducing the frame size of the frame 1. In one embodiment, the first elastic adhesive member 7 may also extend beyond the second bearing surface B2 and be partially accommodated within the third interval g3. In one embodiment, the third dimension d3 is 2 mm, and the fourth dimension d4 is 1 mm, but this is not a limitation.

[0091] In one embodiment, the ratio of the first interval g1 to the third dimension d3 is 0.125 < g1 / d3 < 0.3; or, the ratio of the third interval g3 to the fourth dimension d4 is 0.25 < g3 / d4 < 0.6. By limiting the dimensional relationships between the first interval g1 and the third dimension d3 of the first bearing surface B1, and between the third interval g3 and the fourth dimension d4 of the second bearing surface B2, the assembly tolerance / expansion accommodating space and support effect are ensured, while limiting the interval dimensions as much as possible to avoid adverse effects on the dimensions of the support body 31 and the frame 1, thereby reducing the frame size of the backlight module.

[0092] In one embodiment, the backlight module further includes an optical film assembly located on the diffuser plate 4. The third sidewall S3 of the second support portion 312 faces the diffuser plate 4. In the thickness direction of the backlight module, the third sidewall S3 has a fifth dimension d5, wherein the ratio between the fifth dimension d5 and the first dimension d1 is 0.55 < d5 / d1 < 0.9. In one embodiment, the second bearing surface B2 of the second support portion 312 is substantially flush with the uppermost optical film 5 in the optical film assembly.

[0093] Please see Figure 5 , Figure 5 A cross-sectional schematic diagram of a backlight module 200 according to another embodiment of the present invention is shown. In one embodiment, the support body 31 further has a third support portion 313, which is disposed on the fifth side wall S5 and is tenon-mortised to the first side plate 12 of the frame 1. The tenon-mortise and tenon connection between the third support portion 313 and the first side plate 12 of the frame 1 facilitates positioning during assembly and strengthens the stable connection between the support body 31 and the frame 1, maintaining the dimensions of the first interval g1, the third interval g3, etc.

[0094] In one embodiment, the third support portion 313 protrudes from the fifth side wall S5, and the first side plate 12 is provided with a corresponding recess 121. The size of the recess 121 does not exceed half the size of the first side plate 12 in the thickness direction of the backlight module 200 or in the first direction x. By limiting the dimensional relationship between the recess 121 and the first side plate 12, a snap-fit ​​connection is achieved while ensuring the strength of the side plate of the frame 1, thereby ensuring subsequent support for components such as the display panel and structural stability.

[0095] In one embodiment, such as Figure 3As shown, corresponding to each side of the diffuser plate 4, the support body 31 includes a first part 31a, a second part 31b, a third part 31c, and a fourth part 31d. Each part includes a first support portion 311 and a second support portion 312. The first support portion 311 of the first part 31a is adhesively fixed to the base plate 11. There is no adhesive layer between the circuit board 21, the second part 31b, the third part 31c, and the fourth part 31d and the base plate 11. In this embodiment, the side where the first side plate 12 is located is a fixed side, and the other sides are free sides. This arrangement can ensure the basic positioning between the lamp cup structure 3 and the frame 1, and also facilitates the expansion of the diffuser plate 4 / optical film 5 without deformation or jumping off due to the complete fixation of the support body 31. In one embodiment, there is no adhesive layer between the circuit board 21 and the base plate 11. The entire circuit board 21 and the lamp cup structure 3 are positioned / fixed only by the adhesive / mortise and tenon connection between the first support portion 311 on one side and the base plate 11, which is convenient for assembly and rework. It should be noted that the implementation method in this embodiment may include a third support portion 313 being provided on the first part 31a of the support body 31 and tenon-jointedly connected to the first side plate 12 of the frame 1. At the same time, the first support portion 311 of the first part 31a of the support body 31 is adhesively fixed to the base plate 11. There is no adhesive layer between the circuit board 21, the second part 31b, the third part 31c, and the fourth part 31d and the base plate 11. In this case, when assembling the lamp cup structure 3, the third support portion 313 can be used to fix the first side plate 12 of the frame 1. In this case, the support body 31 is fixed to the base plate 11 of the frame 1 by an adhesive layer; or, the support body 31 is not directly connected to the side plate of the frame 1, the first support part 311 of the first part 31a of the support body 31 is adhesively fixed to the base plate 11, and there is no adhesive layer between the circuit board 21, the second part 31b, the third part 31c and the fourth part 31d and the base plate 11. In this case, when assembling the lamp cup structure 3, the support body 31 can be fixed to the base plate 11 of the frame 1 directly by an adhesive layer after alignment (for example with the help of alignment marks).

[0096] Please see Figure 2 and Figure 6 , Figure 6 A schematic diagram of a display device 2000 according to an embodiment of the present invention is shown. The present invention also proposes a display device 2000, comprising the aforementioned backlight module 100 and a display panel, wherein the display panel is disposed on the backlight module 100.

[0097] In one embodiment, the display device 2000 further includes a cover plate 6 and a second elastic adhesive member 8 (see...). Figure 2The display panel (not shown) is fixedly mounted on the cover plate 6. The frame 1 has a third bearing surface B3 corresponding to the periphery of the cover plate 6. The second elastic adhesive member 8 is disposed on the third bearing surface B3 and fixedly connected to the cover plate 6. In one embodiment, the second elastic adhesive member 8 may extend beyond the third bearing surface B3 and be partially accommodated within the third interval g3. In this embodiment, by disposing of the second elastic adhesive member 8 on the third bearing surface B3, the third interval g3 provides assembly tolerance / expansion accommodation space for the second elastic adhesive member 8, effectively controlling the size of the side panel of the frame 1, thereby facilitating a narrow bezel.

[0098] In one embodiment, the frame 1 includes a first side plate 12, a second side plate 13, a third side plate 14 and a fourth side plate 15 connected to the base plate 11. The display panel has a wiring binding area (not shown), and the side where the wiring binding area is located corresponds to the first side plate 12. The support body 31 is tenon-and tenon connected to the first side plate 12 and is not connected to the second side plate 13, the third side plate 14 and the fourth side plate 15. In this embodiment, the first side plate 12 corresponds to the side where the wiring bonding area of ​​the display panel is located. The width of the frame on this side is slightly larger than the width of the frame on other sides. In this way, the structural connection strength between the support body 31 and the frame 1 can be satisfied under the existing frame 1 frame conditions without increasing the frame width. The other sides (corresponding to the second part 31b, the third part 31c and the fourth part 31d of the support body 31) only need to be provided with the first support part 311 and the second support part 312, without the need for mortise and tenon joints. It can also effectively control the frame size of the second part 31b, the third part 31c and the fourth part 31d of the support body 31 corresponding to the frame 1. In addition, the mortise and tenon joint is conducive to positioning first. After positioning, the first support part 311 here is glued to the base plate 11 by the adhesive layer for further fixation, thereby facilitating assembly.

[0099] In one embodiment, the first elastic adhesive 7 and the second elastic adhesive 8 can be foam adhesive, PET adhesive, PVC adhesive, etc., but are not limited thereto.

[0100] Compared to prior art, the backlight module and display device disclosed in this invention reduce the gap between the frame, the diffuser plate, and the display panel by placing the diffuser plate on the first support part of the lamp cup structure support, thereby reducing the overall size of the frame and providing a high screen ratio of the display device.

[0101] The above-disclosed content is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, any equivalent technical changes made based on the contents of the present invention specification and drawings fall within the scope of the patent application of the present invention.

Claims

1. A backlight module, characterized in that, The backlight module includes: The frame has a base plate; A light-emitting substrate includes a circuit board and a plurality of light-emitting elements arrayed on the circuit board, wherein the circuit board is disposed on the base plate; A lamp cup structure, wherein the lamp cup structure is disposed on the light-emitting substrate, and the lamp cup structure comprises... Spacers are fixedly mounted on the circuit board and form multiple hollow sections to surround the corresponding light-emitting elements. A support body, located on the base plate, and connected to the periphery of the spacer to surround the circuit board, the support body having a first support portion; and A diffusion plate, which is supported on the first support portion; wherein... A first sidewall of the first support portion is opposite to a second sidewall of the circuit board and has a first gap g1; The support body further includes a second support portion in a stepped shape. In the thickness direction of the backlight module, the second support portion is disposed on the first support portion. A third sidewall of the second support portion is opposite to a fourth sidewall of the diffuser plate and has a second interval g2, wherein the second interval g2 is greater than the first interval g1. The frame has a first side plate connected to the bottom plate. A fifth sidewall of the first support portion and the first side plate have a third interval g3. The fifth sidewall is opposite to the first sidewall, wherein the third interval g3 is greater than the first interval g1. The backlight module further includes a first elastic adhesive member, the second support portion has the third sidewall and the second bearing surface connected to each other, the first elastic adhesive member is disposed on the second bearing surface, and the first elastic adhesive member can extend beyond the second bearing surface and be partially accommodated within the third interval g3; Corresponding to each side of the diffuser plate, the support body includes a first part, a second part, a third part, and a fourth part. Each of the first part, the second part, the third part, and the fourth part includes a first support portion and a second support portion. The first support portion of the first part is adhered and fixed to the base plate. There is no adhesive layer between the circuit board, the second part, the third part, and the fourth part and the base plate.

2. The backlight module according to claim 1, characterized in that, The first interval g1 corresponds to the size of the second sidewall.

3. The backlight module according to claim 1, characterized in that, The first support portion also has a sixth sidewall and a first bearing surface connected to each other. The diffuser plate is supported on the first bearing surface. The sixth sidewall faces the plurality of light-emitting elements. In the thickness direction of the backlight module, the sixth sidewall has a first dimension d1, and the spacer has a second dimension d2, wherein 0.7 < d2 / d1 < 0.

9.

4. The backlight module according to claim 3, characterized in that, In the first direction, the first bearing surface has a third dimension d3, and the second bearing surface has a fourth dimension d4, wherein 0.4 < d4 / d3 < 0.

6.

5. The backlight module according to claim 4, characterized in that, The ratio of the first interval g1 to the third dimension d3 is 0.125 < g1 / d3 < 0.3; or, the ratio of the third interval g3 to the fourth dimension d4 is 0.25 < g3 / d4 < 0.

6.

6. The backlight module according to claim 1, characterized in that, The support body also has a third support portion, which is disposed on the fifth side wall and is tenon-mortise connected to the first side plate of the frame.

7. The backlight module according to claim 6, characterized in that, The third support protrudes from the fifth side wall, and the first side plate is provided with a corresponding recess. In the first direction, the size of the recess does not exceed half the size of the first side plate.

8. A display device, characterized in that, It includes a backlight module and a display panel as described in any one of claims 1 to 7, wherein the display panel is disposed on the backlight module.

9. The display device according to claim 8, characterized in that, The display device further includes a cover plate and a second elastic adhesive member. The display panel is fixedly disposed on the cover plate. The frame has a third bearing surface corresponding to the periphery of the cover plate. The second elastic adhesive member is disposed on the third bearing surface and fixedly connected to the cover plate.

10. The display device according to claim 9, characterized in that, The frame includes a first side plate, a second side plate, a third side plate, and a fourth side plate connected to the base plate. The display panel has a wiring binding area, the side where the wiring binding area is located corresponds to the first side plate. The support body is tenon-and ...

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