Backlight module and display device

Abstract

The embodiment of the utility model discloses a backlight module and a display device. The backlight module comprises a back plate, an optical assembly and a supporting component, the back plate is provided with a first side and a second side which are opposite, a first groove sunken towards the first side is formed in the second side of the back plate, a mounting opening is formed in the bottom of the first groove and penetrates through the back plate in the direction from the second side to the first side, and the optical assembly is arranged on the first side of the back plate. The supporting component is arranged between the back plate and the optical assembly, one end of the supporting component abuts against the optical assembly, the other end of the supporting component penetrates through the installation opening and is connected with the back plate, and at least part of the part, penetrating through the installation opening, of the supporting component is located in the first groove. The part, penetrating through the mounting opening, of the supporting component is protected through the first groove, so that the risk that other structures outside the back plate interfere with the supporting component to damage the supporting component is reduced, the supporting stability of the supporting component on the optical assembly is ensured, and then the display quality of the display device is ensured.

Description

Technical Field

[0001] This application relates to the field of display, specifically to a backlight module and display device. Background Technology

[0002] The backlight module is one of the key components of a display device, providing a bright and uniformly distributed light source for the display panel. Depending on the location of the light source, backlight modules are divided into direct-lit backlight modules and edge-lit backlight modules. A direct-lit backlight module mainly consists of a back panel, a light source, and optical components. The light source is positioned between the optical components and the back panel, and a certain mixing distance needs to be maintained between the back panel and the optical components to ensure uniform light mixing from the light source.

[0003] When a direct-lit backlight module is placed horizontally, the optical components are prone to bending and deformation under their own weight, resulting in uneven light emission. To address this, a support structure is typically placed between the backplate and the optical components to support them. However, these support structures often use a snap-fit ​​method with the backplate. When the support structure protrudes from the back of the backplate, it can easily interfere with external structures and cause damage, thus affecting its supporting effect. Utility Model Content

[0004] This application provides a backlight module and display device, which can solve the problem that the supporting components in existing backlight modules are prone to interference with external structures and thus damage.

[0005] This application provides a backlight module, including:

[0006] A back plate has a first side and a second side opposite to each other. A first groove is formed on the second side of the back plate and recessed toward the first side. A mounting opening is provided at the bottom of the first groove and extends through the back plate along the direction from the second side toward the first side.

[0007] Optical components are disposed on the first side of the back plate;

[0008] A support member is disposed between the back plate and the optical component. One end of the support member abuts against the optical component, and the other end of the support member passes through the mounting opening and is connected to the back plate. At least part of the portion of the support member passing through the mounting opening is located within the first groove.

[0009] Optionally, in some embodiments of this application, the back plate includes a first protrusion protruding in a direction from the first side toward the second side, the first protrusion extending circumferentially along the first groove, the first protrusion enclosing to form the first groove.

[0010] Optionally, in some embodiments of this application, the support member includes:

[0011] A base that passes through the mounting opening and is connected to the back plate, wherein at least a portion of the base passing through the mounting opening is located within the first groove;

[0012] A support member is detachably connected to the base, and the support member abuts against the optical component.

[0013] Optionally, in some embodiments of this application, the height of the side of the base away from the support relative to the bottom of the first groove is less than or equal to the depth of the first groove.

[0014] Optionally, in some embodiments of this application, the backlight module further includes a reflective sheet disposed on a first side of the back plate; the base includes a snap-fit ​​portion and a support portion connected to each other, the snap-fit ​​portion passing through the mounting opening and snapping into the back plate, and the support portion abutting against the side of the reflective sheet facing the back plate.

[0015] Optionally, in some embodiments of this application, a first side portion of the back plate is recessed toward the second side to form a first protrusion, and a second groove is formed on the first side corresponding to the position of the first protrusion, and the orthographic projection of the support portion on the back plate is at least partially located within the second groove.

[0016] Optionally, in some embodiments of this application, the height of the side of the support facing the reflector relative to the optical component is equal to the height of the side of the back plate facing the reflector relative to the optical component.

[0017] Optionally, in some embodiments of this application, the support portion extends in a ring shape along the circumference of the snap-fit ​​portion.

[0018] Optionally, in some embodiments of this application, the snap-fit ​​portion is annular, and the outer radius of the snap-fit ​​portion is greater than or equal to 15 mm and less than or equal to 20 mm; and / or,

[0019] The snap-fit ​​part is circular, and the difference between the outer radius and the inner radius of the snap-fit ​​part is greater than or equal to 10 mm and less than or equal to 20 mm.

[0020] This application also provides a display device including the backlight module described in any of the above embodiments.

[0021] In this embodiment, the backlight module includes a backplate, an optical component, and a support member. The backplate has a first side and a second side facing each other. A first groove is formed on the second side of the backplate, recessed towards the first side. A mounting opening is provided at the bottom of the first groove, extending through the backplate along the direction from the second side towards the first side. The optical component is disposed on the first side of the backplate. The support member is disposed between the backplate and the optical component. One end of the support member abuts against the optical component, and the other end of the support member passes through the mounting opening and connects to the backplate. At least part of the portion of the support member passing through the mounting opening is located within the first groove. That is, when the support member passes through the mounting opening and connects to the backplate, the sidewall of the first groove can at least partially surround the portion of the support member passing through the mounting opening within the first groove. This allows the first groove to protect the portion of the support member passing through the mounting opening, reducing the risk of interference between the support member and other external structures of the backplate, thereby ensuring the stability of the support member's support for the optical component and ultimately ensuring the display quality of the display device. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional structural diagram of a support member applied to a backlight module according to an embodiment of this application;

[0024] Figure 2 This is provided by the embodiments of this application. Figure 1 Enlarged structural diagram of region A in the middle;

[0025] Figure 3 This is an exploded structural diagram of a support member provided in an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. Backlight module;

[0028] 11. Supporting component; 111. Base; 1111. Snap-fit ​​part; 1112. Support part; 1113. First snap-fit ​​structure; 1114. Mounting groove; 1115. Slot structure; 112. Support member; 1121. Second snap-fit ​​structure;

[0029] 12. Back panel; 121. First side; 122. Second side; 123. First groove; 124. Mounting port; 125. First protrusion; 126. Second groove;

[0030] 13. Optical components;

[0031] 14. Reflector sheet. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0033] This application provides a backlight module and a display device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0034] First, this application provides a backlight module, please refer to... Figure 1 and Figure 2 The backlight module 10 includes a back plate 12 and an optical component 13. The back plate 12 is used to set the backlight source. A certain light mixing distance needs to be maintained between the back plate 12 and the optical component 13 to ensure that the light emitted by the backlight source is mixed evenly.

[0035] The back plate 12 has a first side 121 and a second side 122. The optical component 13 is disposed on the first side 121 of the back plate 12, that is, the first side 121 is the light-emitting side of the back plate 12, and the second side 122 is the backlight side of the back plate 12. The second side 122 of the back plate 12 forms a first groove 123 recessed toward the first side 121. The bottom of the first groove 123 is provided with a mounting port 124. The mounting port 124 penetrates the back plate 12 along the direction from the second side 122 toward the first side 121, that is, the mounting port 124 is a through hole opened on the back plate 12.

[0036] The backlight module 10 includes a support member 11, which is disposed between the back plate 12 and the optical component 13. One end of the support member 11 abuts against the optical component 13, and the other end of the support member 11 passes through the mounting port 124 and connects to the back plate 12. In other words, the support member 11 is disposed between the back plate 12 and the optical component 13 to support the optical component 13, preventing it from collapsing during use and thus ensuring normal light output from the backlight module 10.

[0037] In this configuration, at least a portion of the support member 11 passing through the mounting opening 124 is located within the first groove 123. That is, when the support member 11 connects to the back plate 12 through the mounting opening 124, the sidewall of the first groove 123 can at least partially enclose the portion of the support member 11 passing through the mounting opening 124 within the first groove 123. This allows the first groove 123 to protect the portion of the support member 11 passing through the mounting opening 124, reducing the risk of interference between the support member 11 and other external structures of the back plate 12, thereby ensuring the stability of the support member 11 in supporting the optical assembly 13.

[0038] It should be noted that the support member 11 can be fixedly connected to the back plate 12 or it can be detachably connected. This application embodiment does not impose any special limitations.

[0039] In some embodiments, the backplate 12 includes a first protrusion 125 protruding from a first side 121 toward a second side 122. The first protrusion 125 extends circumferentially along a first groove 123, and the first protrusion 125 surrounds and forms the first groove 123. That is, when the support member 11 passes through the mounting opening 124 and connects to the backplate 12, the first protrusion 125 can protect the portion of the support member 11 that passes through the mounting opening 124, reducing the risk of interference between other structures outside the backplate 12 and the support member 11, thereby ensuring the stability of the support member 11 in supporting the optical component 13.

[0040] In some embodiments, please refer to Figure 2 and Figure 3 The support member 11 includes a base 111 and a support member 112. The base 111 passes through a mounting opening 124 and is connected to a back plate 12. At least part of the portion of the base 111 passing through the mounting opening 124 is located within a first groove 123. The support member 112 is detachably connected to the base 111 and abuts against the optical assembly 13. That is, the base 111 partially passes through and is connected to the back plate 12, while the support member 112 is located between the back plate 12 and the optical assembly 13 to support the optical assembly 13.

[0041] For backlight modules 10 of different specifications, the distance between the backplate 12 and the optical component 13 may vary, requiring support members 112 of different heights to support the optical component 13. In this embodiment, the support member 112 is detachably connected to the base 111, allowing the same base 111 to be connected to support members 112 of different heights. For different backlight modules 10, simply select the support member 112 of the corresponding height and connect it to the base 111. This eliminates the need for repeated disassembly and reassembly between the base 111 and the backplate 12. This structural design broadens the applicability of the support member 11 and makes the assembly of the support member 11 and the backplate 12 more convenient.

[0042] The base 111 has a first snap-fit ​​structure 1113 protruding from its outer peripheral surface. When the base 111 is installed onto the back plate 12, it passes through the mounting opening 124 on the back plate 12 from the light-emitting side. The base 111 will be squeezed and deformed during the passage, and will return to its initial state after passing through. The first snap-fit ​​structure 1113 then snaps onto the backlight side of the back plate 12. Correspondingly, when the base 111 needs to be disassembled, it is deformed by squeezing the base 111, so that the first snap-fit ​​structure 1113 can pass through the mounting opening 124 again. After the base 111 is removed, it can be released to return to its initial state, thereby achieving a detachable connection between the base 111 and the back plate 12.

[0043] It should be noted that the support member 112 and the base 111 can also be connected by a snap-fit ​​and a slot. Specifically, the support member 112 has a second snap-fit ​​structure 1121 protruding on the outer peripheral surface near the bottom, and the base 111 has an installation groove 1114 on the side facing the support member 112. The side wall of the installation groove 1114 forms a slot structure 1115. When installing the support member 112, the support member 112 is inserted into the mounting groove 1114. During the insertion process, the second snap-fit ​​structure 1121 will deform under the pressure of the side wall of the mounting groove 1114 until the second snap-fit ​​structure 1121 is engaged in the slot structure 1115. Correspondingly, when disassembling the support member 112, the support member 112 is deformed by squeezing it, causing the second snap-fit ​​structure 1121 to come out of the slot structure 1115. Then the support member 112 is pulled out from the mounting groove 1114. After the support member 112 is removed, it can be released to return to the initial state, thereby realizing the detachable connection between the support member 112 and the base 111.

[0044] The second snap-fit ​​structure 1121 can extend in a ring shape along the circumference of the support member 112. Correspondingly, the slot structure 1115 on the base 111 can also extend in a ring shape along the circumference of the mounting slot 1114. This allows the support member 112 to be inserted into the mounting slot 1114 without alignment, thereby simplifying the assembly method of the support member 112 and the base 111.

[0045] In addition, multiple second snap-fit ​​structures 1121 may be protruded from the outer peripheral surface of the support member 112. The multiple second snap-fit ​​structures 1121 are spaced apart along the circumference of the support member 112. Correspondingly, multiple spaced slot structures 1115 are also formed on the side wall of the mounting groove 1114 of the base 111. This structural arrangement requires the support member 112 to be aligned when inserted into the mounting groove 1114, but it can prevent the support member 112 from rotating relative to the base 111 during the use of the support member 11, thereby helping to improve the stability of the support member 11 during use.

[0046] In some embodiments, the height of the side of the base 111 facing away from the support member 112 relative to the bottom of the first groove 123 is less than or equal to the depth of the first groove 123. That is, the height of the base 111 extending through the mounting opening 124 from the back plate 12 is less than or equal to the depth of the first groove 123, meaning that the portion of the base 111 extending through the mounting opening 124 is entirely located within the first groove 123. This allows the first groove 123 to protect the entire base 111, further reducing the risk of the base 111 being damaged due to interference with the external structure of the back plate 12, thereby improving the support stability of the support member 11 during use.

[0047] In some embodiments, the backlight module 10 further includes a reflective sheet 14, which is disposed on the first side 121 of the back plate 12, that is, the reflective sheet 14 is disposed on the light-emitting side of the back plate 12. The reflective sheet 14 is used to reflect the light emitted by the backlight source on the back plate 12 to improve the backlight brightness and backlight utilization rate.

[0048] The base 111 includes a snap-fit ​​part 1111 and a support part 1112 that are connected to each other. The snap-fit ​​part 1111 passes through the mounting hole 124 and snaps into the back plate 12. The support part 1112 abuts against the side of the reflector 14 facing the back plate 12. That is, the support part 1112 is used to support the reflector 14 to prevent the reflector 14 from collapsing locally.

[0049] It should be noted that the support part 1112 is also used to cooperate with the snap-fit ​​part 1111. The snap-fit ​​part 1111 has a first snap-fit ​​structure 1113. When the snap-fit ​​part 1111 is passed through the mounting hole 124 and snapped with the back plate 12, the first snap-fit ​​structure 1113 snaps onto the side of the back plate 12 away from the reflector 14, and the support part 1112 abuts against the side of the back plate 12 facing the reflector 14, so that the base 111 is stably snapped onto the back plate 12, thereby ensuring the connection stability between the base 111 and the back plate 12.

[0050] In some embodiments, the first side 121 of the back plate 12 is recessed toward the second side 122 to form a first protrusion 125, and a second groove 126 is formed on the first side 121 corresponding to the position of the first protrusion 125. The orthographic projection of the support portion 1112 on the back plate 12 is at least partially located within the second groove 126. When the back plate 12 protrudes entirely away from the optical component 13 at the position corresponding to the first protrusion 125, the side of the back plate 12 facing the optical component 13 will be recessed at the position corresponding to the first protrusion 125 to form the second groove 126. Since the reflector 14 is disposed on the side of the back plate 12 facing the optical component 13, the reflector 14 is unsupported at the position corresponding to the first protrusion 125, which may cause the reflector 14 to partially collapse and produce an optical dark spot, affecting the backlight quality of the backlight module 10.

[0051] In this embodiment, the position of the support portion 1112 corresponds to the position of the second groove 126 formed by the indentation at the position corresponding to the first protrusion 125 on the side of the back plate 12 facing the optical component 13. This allows the support portion 1112 to replace the back plate 12 at the corresponding position of the second groove 126 to support the reflector 14, thereby reducing the risk of optical dark spots appearing on the reflector 14 due to local collapse.

[0052] In some embodiments, the height of the side of the support portion 1112 facing the reflector 14 relative to the optical component 13 is equal to the height of the side of the back plate 12 facing the reflector 14 relative to the optical component 13. That is, the side of the support portion 1112 facing the reflector 14 is flush with the side of the back plate 12 facing the reflector 14, so that the support portion 1112 can ensure the overall flatness of the reflector 14 when supporting the reflector 14, thereby helping the reflector 14 to reflect the light emitted by the backlight source on the back plate 12, thereby improving the backlight brightness and backlight utilization rate.

[0053] In some embodiments, the support portion 1112 extends in a ring shape along the circumference of the latching portion 1111, that is, the support portion 1112 extends in a ring shape relative to the latching portion 1111 to ensure that the support portion 1112 has sufficient support area for the reflective sheet 14, thereby further reducing the risk of optical dark spots appearing on the reflective sheet 14 due to local collapse.

[0054] In some examples, the support portion 1112 is annular, with an outer radius greater than or equal to 15 mm and less than or equal to 20 mm. If the outer radius of the support portion 1112 is too small, the overall size of the support portion 1112 will be too small, resulting in a small support area for the reflector 14, which may cause the reflector 14 to collapse locally. If the outer radius of the support portion 1112 is too large, the overall size of the base 111 will be too large, resulting in an increase in the overall size and weight of the support member 11, which is not conducive to the application of the support member 11 in the backlight module 10.

[0055] In the actual manufacturing process, the outer radius of the support part 1112 can be set to 15mm, 16mm, 18mm or 20mm, etc. The specific value of its outer radius can be selected and adjusted according to the actual design requirements, and no special limitation is made here.

[0056] In some examples, the support portion 1112 is annular, and the difference between the outer radius and the inner radius of the support portion 1112 is greater than or equal to 10 mm and less than or equal to 20 mm. The difference between the outer and inner radii of the support portion 1112 directly affects the support area of ​​the support portion 1112 on the reflector 14. If the difference is too small, the support area of ​​the support portion 1112 on the reflector 14 will be too small, making the reflector 14 prone to local collapse. If the difference is too large, the overall size of the base 111 will be too large, which is not conducive to the application of the support member 11 in the backlight module 10; or the size of the support member 112 will be too small, which is not conducive to the stability of the support member 112 on the optical component 13.

[0057] In the actual manufacturing process, the difference between the outer radius and the inner radius of the support part 1112 can be set to 10mm, 12mm, 15mm, 18mm or 20mm, etc. The specific difference can be selected and adjusted according to the actual design requirements, and no special limitation is made here.

[0058] It should be noted that the base 111 in this embodiment can be a milky white glossy surface to reflect the backlight emitted by the backlight source on the backplate 12, thereby reducing the risk of optical dark spots appearing around the support 112. The support 112 can be made of a highly transparent plastic material, allowing the backlight emitted by the backlight source on the backplate 12 to refract freely on the support 112, thereby improving the backlight brightness and backlight utilization rate.

[0059] Secondly, this application embodiment also provides a display device, which includes a backlight module. The specific structure of the backlight module is as described in the above embodiments. Since this display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0060] The display device includes a backlight module 10 and a display panel. The display panel is located on the light-emitting side of the backlight module 10. The backlight emitted by the backlight module 10 is filtered, selected and mixed by the display panel and then displayed on the display panel. By controlling the driving signals of the backlight module 10 and the display panel, the display screen can be controlled to meet different display needs.

[0061] Specifically, the backlight module 10 includes a back plate 12, an optical component 13, and a support member 11. The back plate 12 has a first side 121 and a second side 122 facing each other. The second side 122 of the back plate 12 forms a first groove 123 recessed toward the first side 121. A mounting opening 124 is provided at the bottom of the first groove 123. The mounting opening 124 passes through the back plate 12 along the direction from the second side 122 toward the first side 121. The optical component 13 is disposed on the first side 121 of the back plate 12. The support member 11 is disposed between the back plate 12 and the optical component 13. One end of the support member 11 abuts against the optical component 13, and the other end of the support member 11 passes through the mounting opening 124 and is connected to the back plate 12. At least part of the portion of the support member 11 passing through the mounting opening 124 is located within the first groove 123. When the support member 11 passes through the mounting opening 124 and connects to the back plate 12, the sidewall of the first groove 123 can at least partially surround the portion of the support member 11 that passes through the mounting opening 124 within the first groove 123. This allows the first groove 123 to protect the portion of the support member 11 that passes through the mounting opening 124, reducing the risk of interference between the support member 11 and other external structures of the back plate 12, thereby ensuring the stability of the support member 11 in supporting the optical components 13 and thus ensuring the display quality of the display device.

[0062] The foregoing has provided a detailed description of a backlight module and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A backlight module, characterized in that, include: A back plate has a first side and a second side opposite to each other. A first groove is formed on the second side of the back plate and recessed toward the first side. A mounting opening is provided at the bottom of the first groove and extends through the back plate along the direction from the second side toward the first side. Optical components are disposed on the first side of the back plate; A support member is disposed between the back plate and the optical component. One end of the support member abuts against the optical component, and the other end of the support member passes through the mounting opening and is connected to the back plate. At least part of the portion of the support member passing through the mounting opening is located within the first groove.

2. The backlight module of claim 1, wherein, The back plate includes a first protrusion protruding from the first side toward the second side, the first protrusion extending circumferentially along the first groove, and the first protrusion enclosing the first groove to form the first groove.

3. The backlight module of claim 1, wherein, The supporting component includes: A base that passes through the mounting opening and is connected to the back plate, wherein at least a portion of the base passing through the mounting opening is located within the first groove; A support member is detachably connected to the base, and the support member abuts against the optical component.

4. The backlight module of claim 3, wherein, The height of the side of the base away from the support relative to the bottom of the first groove is less than or equal to the depth of the first groove.

5. The backlight module of claim 3, wherein, The backlight module also includes a reflective sheet disposed on a first side of the back panel; the base includes a snap-fit ​​part and a support part connected to each other, the snap-fit ​​part passes through the mounting port and snaps into the back panel, and the support part abuts against the side of the reflective sheet facing the back panel.

6. The backlight module of claim 5, wherein, The first side portion of the back plate is recessed toward the second side to form a first protrusion, and a second groove is formed on the first side corresponding to the position of the first protrusion. The orthographic projection of the support portion on the back plate is at least partially located within the second groove.

7. The backlight module of claim 5, wherein, The height of the side of the support facing the reflector relative to the optical component is equal to the height of the side of the back plate facing the reflector relative to the optical component.

8. The backlight module of claim 5, wherein, The support portion extends in a ring shape along the circumference of the snap-fit ​​portion.

9. The backlight module of claim 8, wherein, The snap-fit ​​portion is annular, and the outer radius of the snap-fit ​​portion is greater than or equal to 15 mm and less than or equal to 20 mm; and / or, The snap-fit ​​part is circular, and the difference between the outer radius and the inner radius of the snap-fit ​​part is greater than or equal to 10 mm and less than or equal to 20 mm.

10. A display device, characterized by comprising: Includes the backlight module as described in any one of claims 1 to 9.

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