Vehicle-mounted backlight module and vehicle-mounted display device

Abstract

This application relates to the technical field of automotive backlight modules, specifically providing an automotive backlight module and an automotive display device. The automotive backlight module includes a die-cast part with a die-cast base plate and die-cast side edges integrally formed on the periphery of the die-cast base plate. The die-cast side edges have a die-cast top surface facing away from the die-cast base plate and a die-cast inner surface. Several limiting structures are provided on the die-cast top surface. A central iron frame has an iron frame body and several mounting structures, all disposed on the iron frame body. The iron frame body is disposed on the die-cast inner surface. The several mounting structures and several limiting structures are matched one-to-one to prevent the iron frame body from detaching from the die-cast inner surface. By providing limiting structures on the die-cast top surface and matching them with the mounting structures of the central iron frame, the automotive backlight module suppresses the inward concavity and warping of the iron frame body, preventing the central iron frame from detaching from the die-cast part and improving the assembly reliability of the automotive backlight module.

Description

Technical Field

[0001] This application relates to the field of automotive backlight module technology, and more particularly to an automotive backlight module and an automotive display device. Background Technology

[0002] As automotive display screens become increasingly larger and bezel widths gradually decrease, the structural design of automotive backlight modules faces higher requirements for precision and stability. Existing automotive display modules generally use a central sheet metal frame (also known as a central iron frame) as a crucial structural component to support the display screen, backlight, and related components. However, with the increase in backlight size and the narrowing of the bezel, the thickness and structural strength of the central sheet metal frame are limited, making it prone to deformation during molding and assembly, especially in the central area of ​​the module's long side, where concave deformation is likely to occur.

[0003] This can lead to non-compliant viewing area dimensions (NG) when subsequently assembled into die-cast parts or the main unit frame, and even quality issues such as uneven product appearance and obvious local deformation. At the same time, due to structural deformation, the assembly tolerance between the module and the die-cast part increases, which can easily cause the snap-fit ​​to be loose, loose, or even fall off, resulting in optical defects such as light leakage at the edges and affecting the display effect.

[0004] Therefore, existing technologies have defects and shortcomings, and need further improvement and development. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide an automotive backlight module and an automotive display device, which aims to solve the problem that the automotive backlight module in the prior art is too narrow in the middle iron frame due to the large size and narrow bezel development requirements, which makes it easy to deform and separate from the die-cast parts.

[0006] The technical solution adopted by this application to solve the technical problem is as follows: A vehicle-mounted backlight module, comprising: A die casting has a die casting base plate and die casting side edges integrally formed on the four edges of the die casting base plate. The die casting side edges have a die casting side top surface facing away from the die casting base plate. The die casting side edges also have a die casting inner surface. Several limiting structures are provided on the die casting side top surface. The central iron frame has an iron frame body and a plurality of hanging platform structures, each disposed on the iron frame body. The iron frame body is disposed on the inner side of the die-casting surface. The plurality of hanging platform structures and the plurality of limiting structures are matched one-to-one to prevent the iron frame body from detaching from the inner side of the die-casting surface.

[0007] Optionally, each of the limiting structures includes a limiting groove, the limiting groove having a limiting groove wall connected to the inner surface of the die-casting, the limiting groove wall including a first stop portion, a clearance notch portion and a second stop portion; the limiting structure enters the limiting groove from the groove opening and the clearance notch portion of the limiting groove, the first stop portion and the second stop portion are used to cooperate with the limiting structure to prevent the iron frame body from separating from the inner surface of the die-casting.

[0008] Optionally, each of the mounting structures includes: The main body connecting part is connected at one end to the iron frame body; A hanging part is provided at one end of the main body connecting part that is away from the iron frame body; The main body connecting part is located in the avoidance notch and the limiting groove, the hook part is disposed in the limiting groove, and the hook part cooperates with the first stop part and the second stop part respectively to prevent the iron frame body from separating from the die-cast inner side.

[0009] Optionally, the hanging part includes a first hanging plate, a hanging body, and a second hanging plate integrally formed in sequence. The first hanging plate cooperates with the first stop part, and the second hanging plate cooperates with the second stop part to prevent the iron frame body from separating from the die-cast inner side.

[0010] Optionally, the limiting groove has a first end and a second end at both ends in a direction perpendicular to the wall of the limiting groove; the first hanging plate is located at the first end and is clearance-fitted with the first end; the first hanging plate is located at the first end and is clearance-fitted with the first end.

[0011] Optionally, the first hanging plate, the hanging body, and the body connecting part form a first hanging angle portion, and the second hanging plate, the hanging body, and the body connecting part form a second hanging angle portion, and both the first hanging angle portion and the second hanging angle portion are set with rounded corners.

[0012] Optionally, the first stop portion has a rounded corner corresponding to the first abutment angle portion, and the second stop portion has a rounded corner corresponding to the second abutment angle portion.

[0013] Optionally, the abutment portion has an abutment surface facing the first stop portion and the second stop portion, and the abutment portion also has an abutment top surface and an abutment bottom surface, with the abutment bottom surface facing the bottom of the limiting groove. The first stop portion has a first stop surface facing the abutment portion; The second stop portion has a second stop surface facing the abutment portion; The hanging surface is gradually moved closer to the first stop surface and the second stop surface from the top surface to the bottom surface of the hanging surface. Both the first stop surface and the second stop surface are moved away from the hanging surface along the direction from the opening of the limiting groove to the bottom of the groove.

[0014] Optionally, stress relief notches are provided on the iron frame bodies on both sides of several of the hanging platform structures; A double-sided adhesive strip is also provided between the hanging platform structure and the limiting structure.

[0015] Another technical solution adopted by this application to solve the technical problem is as follows: an in-vehicle display device, which includes the in-vehicle backlight module as described above.

[0016] Beneficial effects: This application provides an automotive backlight module and an automotive display device. The automotive backlight module has a limiting structure set on the top surface of the die-cast side, which cooperates with the mounting structure of the central iron frame to effectively suppress the concavity and warping of the iron frame body, ensuring the viewing area size and flatness; it also prevents springback and separation under vibration and thermal cycling, avoids the central iron frame from separating from the die-cast part, and improves the assembly reliability of the automotive backlight module. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a portion of the vehicle backlight module provided in this application; Figure 2 It is provided in this application Figure 1 Enlarged diagram of point A in the diagram; Figure 3 This is a top view schematic diagram of a portion of the structure of the vehicle-mounted backlight module provided in this application; Figure 4 It is provided in this application Figure 3 A three-dimensional sectional view along the I-I direction; Figure 5 It is provided in this application Figure 4 Enlarged diagram of point B in the diagram; Figure 6 This is a partial top-view enlarged schematic diagram of the vehicle-mounted backlight module provided in this application; Figure 7 It is provided in this application Figure 5 Enlarged diagram of point C in the diagram; Explanation of reference numerals in the attached figures: 10. Vehicle backlight module; 20. Die-cast part; 30. Iron frame; 40. Double-sided adhesive strip; 21. Die-cast base plate; 22. Die-cast side edge; 23. Limiting structure; 221. Die-cast side top surface; 222. Die-cast inner side surface; 231. Limiting groove; 2311. Limiting groove wall; 2312. First stop part; 2313. Alternating notch part; 2314. Second stop part; 2315. First stop surface; 23 16. Second stop surface; 31. Iron frame body; 32. Hanging platform structure; 321. Body connection part; 322. Hanging part; 323. Stress relief notch; 3221. First hanging plate; 3222. Hanging body; 3223. Second hanging plate; 3224. First hanging angle part; 3225. Second hanging angle part; 3226. Hanging surface; 3227. Hanging top surface; 3228. Hanging bottom surface. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer and more explicit, the following detailed description of this application is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0019] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] Please combine Figures 1 to 5The first embodiment of this application provides a vehicle-mounted backlight module 10, including a die-cast part 20 and a central iron frame 30, as well as other functional components (other structures of the vehicle-mounted backlight module 10 besides the die-cast part 20 and the central iron frame 30, such as light strips and various optical films, etc.). In this application, there is no related improvement to other functional components. Other functional components in the prior art can be directly applied to the backlight module in this application. Other functional components will not be described in detail in this application.

[0022] The die-cast part 20 has a die-cast base plate 21 and a die-cast side edge 22. The die-cast side edge 22 is integrally formed on the four edges of the die-cast base plate 21. The die-cast side edge 22 has a die-cast side top surface 221 facing away from the die-cast base plate 21. The die-cast side edge 22 also has a die-cast inner side surface 222. A plurality of limiting structures 23 are provided on the die-cast side top surface 221.

[0023] The central iron frame 30 has an iron frame body 31 and several hanging platform structures 32. The several hanging platform structures 32 are all disposed on the iron frame body 31. The iron frame body 31 is disposed on the die-cast inner side surface 222. Specifically, the iron frame body 31 can be fitted to the die-cast inner side surface 222, and the iron frame body 31 can have a fitting gap with the die-cast inner side surface 222 within the design allowable range. The several hanging platform structures 32 and several limiting structures 23 are matched one-to-one to prevent the iron frame body 31 from separating from the die-cast inner side surface 222.

[0024] It is understood that the vehicle backlight module 10 effectively suppresses the concavity and warping of the iron frame body 31 by setting a limiting structure 23 on the die-cast side top surface 221 and cooperating with the mounting structure 32 of the central iron frame 30, thereby ensuring the viewing area size and flatness; it also prevents rebound and separation under vibration and thermal cycling, avoids the central iron frame 30 from separating from the die-cast part 20, and improves the assembly reliability of the vehicle backlight module 10.

[0025] Please refer to further details. Figure 6 In some embodiments, each of the limiting structures 23 includes a limiting groove 231, the limiting groove 231 having a limiting groove wall 2311 connected to the die-cast inner surface 222, the limiting groove wall 2311 including a first stop portion 2312, a clearance notch portion 2313 and a second stop portion 2314; the limiting structure 23 enters the limiting groove 231 from the groove opening and the clearance notch portion 2313 of the limiting groove 231, the first stop portion 2312 and the second stop portion 2314 are used to cooperate with the limiting structure 23 to prevent the iron frame body 31 from separating from the die-cast inner surface 222.

[0026] It is understandable that by setting the limiting structure 23 as the limiting groove 231 and allowing the mounting structure 32 to be inserted from the groove opening and the clearance notch 2313, the assembly efficiency is improved; at the same time, the first stop 2312 and the second stop 2314 of the limiting groove wall 2311 can form a double stop lock to suppress the concave springback and relative slippage of the iron frame body 31; thereby maintaining the connection stability between the middle iron frame 30 and the die-cast inner side surface 222 under vibration.

[0027] In some embodiments, the mounting structure 32 includes a body connecting part 321 and a hanging part 322. One end of the body connecting part 321 is connected to the iron frame body 31. The hanging part 322 is disposed at the end of the body connecting part 321 away from the iron frame body 31. The body connecting part 321 is located in the clearance notch 2313 and the limiting groove 231. The hanging part 322 is disposed in the limiting groove 231. The hanging part 322 cooperates with the first stop part 2312 and the second stop part 2314 respectively to prevent the iron frame body 31 from separating from the die-cast inner surface 222.

[0028] It is understood that the mounting structure 32 is divided into a main body connecting part 321 and a hanging part 322. The setting of the clearance notch 2313 is to accommodate the main body connecting part 321, thereby avoiding interference between the mounting structure 32 and the die-casting side edge 22, so that the hanging part 322 is accommodated in the limiting groove 231. The hanging part 322 cooperates with the first stop part 2312 and the second stop part 2314 respectively to limit the movement, thereby improving assembly efficiency, yield and overall machine reliability.

[0029] In some embodiments, the abutment part 322 includes a first abutment plate 3221, a abutment body 3222, and a second abutment plate 3223 integrally formed in sequence. The first abutment plate 3221 cooperates with the first stop part 2312, and the second abutment plate 3223 cooperates with the second stop part 2314 to prevent the iron frame body 31 from separating from the die-cast inner side surface 222, thereby ensuring a stable fit between the limiting structure 23 and the hanging platform structure 32.

[0030] In some embodiments, the limiting groove 231 has a first end and a second end at both ends in a direction perpendicular to the wall 2311 of the limiting groove; the first abutment plate 3221 is located at the first end and is clearance-fitted with the first end; the first abutment plate 3221 is located at the first end and is clearance-fitted with the first end. This achieves both effective cooperation between the abutment part 322 and the limiting groove 231 and facilitates the assembly of the abutment part 322 and the limiting groove 231.

[0031] In some embodiments, the first mounting plate 3221, the mounting body 3222, and the body connecting portion 321 form a first mounting angle portion 3224, and the second mounting plate 3223, the mounting body 3222, and the body connecting portion 321 form a second mounting angle portion 3225. Both the first mounting angle portion 3224 and the second mounting angle portion 3225 are rounded. This further avoids collisions between the first mounting angle portion 3224 and the first stop portion 2312 during the assembly of the iron frame 30 and the die-cast part 20, and increases the connection strength between the first mounting plate 3221 and the mounting body 3222; and also avoids collisions between the second mounting angle portion 3225 and the second stop portion 2314, and increases the connection strength between the second mounting plate 3223 and the mounting body 3222.

[0032] In some embodiments, the first stop portion 2312 has a rounded corner corresponding to the first abutment angle portion 3224, and the second stop portion 2314 has a rounded corner corresponding to the second abutment angle portion 3225. This further reduces assembly collision damage between the abutment portion 322 and the first stop portion 2312 and the second stop portion 2314.

[0033] Please refer to further information. Figure 7 In some embodiments, the abutment portion 322 faces an abutment surface 3226 having a direction toward the first stop portion 2312 and the second stop portion 2314. The abutment portion 322 also has an abutment top surface 3227 and an abutment bottom surface 3228, with the abutment bottom surface 3228 facing the bottom of the limiting groove 231. The first stop portion 2312 has a first stop surface 2315 facing the abutment portion 322. The second stop portion 2314 has a second stop surface 2316 facing the abutment portion 322. The abutment surface 3226 is gradually closer to the first stop surface 2315 and the second stop surface 2316 from the abutment top surface 3227 to the abutment bottom surface 3228. Both the first stop surface 2315 and the second stop surface 2316 are disposed away from the abutment surface 3226 along the direction from the opening to the bottom of the limiting groove 231.

[0034] It can be seen that by gradually moving the hanging surface 3226 closer to the first stop surface 2315 and the second stop surface 2316 from the hanging top surface 3227 to the hanging bottom surface 3228, and by moving the first stop surface 2315 and the second stop surface 2316 away from the hanging surface 3226 along the groove opening to the bottom of the limiting groove 231, when the iron frame body 31 deforms and detaches from the pressing inner side, the hanging surface 3226 moves toward the first stop surface 2315 and the second stop surface 2316, thereby improving the connection stability between the hanging part 322 and the first stop surface 2315 and the second stop surface 2316.

[0035] In some embodiments, stress relief notches 323 are provided on the iron frame bodies 31 on both sides of several of the hanging platform structures 32, which can effectively reduce the probability of deformation failure of the iron frame bodies 31.

[0036] In some embodiments, a double-sided adhesive strip 40 is also provided between the mounting structure 32 and the limiting structure 23, thereby further improving the connection strength between the mounting structure 32 and the limiting structure 23.

[0037] The second embodiment of this application also provides an in-vehicle display device, wherein the in-vehicle display device includes the in-vehicle backlight module 10 as described in the first embodiment of this application, thereby effectively avoiding the separation of the central iron frame 30 from the die-cast part 20 due to the large size of the in-vehicle display device.

[0038] In summary, this application provides an automotive backlight module and an automotive display device. The automotive backlight module includes: a die-cast part having a die-cast base plate and die-cast side edges integrally formed on the periphery of the die-cast base plate. The die-cast side edges have a die-cast top surface facing away from the die-cast base plate and a die-cast inner surface. A plurality of limiting structures are provided on the die-cast top surface. A central iron frame having an iron frame body and a plurality of mounting structures all disposed on the iron frame body. The iron frame body is disposed on the die-cast inner surface. The plurality of mounting structures and the plurality of limiting structures are correspondingly matched to prevent the iron frame body from detaching from the die-cast inner surface. The vehicle-mounted backlight module effectively suppresses the concavity and warping of the iron frame by setting a limiting structure on the top surface of the die-cast side, which cooperates with the mounting structure of the iron frame. This ensures the size and flatness of the viewing area. It also prevents springback and separation under vibration and thermal cycling, thus avoiding the separation of the iron frame from the die-cast part and improving the assembly reliability of the vehicle-mounted backlight module.

[0039] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A vehicle-mounted backlight module, characterized in that, include: A die casting has a die casting base plate and die casting side edges integrally formed on the four edges of the die casting base plate. The die casting side edges have a die casting side top surface facing away from the die casting base plate. The die casting side edges also have a die casting inner surface. Several limiting structures are provided on the die casting side top surface. The central iron frame has an iron frame body and a plurality of hanging platform structures, each disposed on the iron frame body. The iron frame body is disposed on the inner side of the die-casting surface. The plurality of hanging platform structures and the plurality of limiting structures are matched one-to-one to prevent the iron frame body from detaching from the inner side of the die-casting surface.

2. The vehicle-mounted backlight module according to claim 1, characterized in that, Each of the aforementioned limiting structures includes a limiting groove, the limiting groove having a limiting groove wall connected to the inner surface of the die-casting, the limiting groove wall including a first stop portion, a clearance notch portion and a second stop portion; the limiting structure enters the limiting groove from the opening of the limiting groove and the clearance notch portion, the first stop portion and the second stop portion are used to cooperate with the limiting structure to prevent the iron frame body from separating from the inner surface of the die-casting.

3. The vehicle-mounted backlight module according to claim 2, characterized in that, The mounting structure includes: The main body connecting part is connected at one end to the iron frame body; A hanging part is provided at one end of the main body connecting part that is away from the iron frame body; The main body connecting part is located in the avoidance notch and the limiting groove, the hook part is disposed in the limiting groove, and the hook part cooperates with the first stop part and the second stop part respectively to prevent the iron frame body from separating from the die-cast inner side.

4. The vehicle-mounted backlight module according to claim 3, characterized in that, The attachment part includes a first attachment plate, an attachment body, and a second attachment plate integrally formed in sequence. The first attachment plate cooperates with the first stop part, and the second attachment plate cooperates with the second stop part to prevent the iron frame body from detaching from the die-cast inner side.

5. The vehicle-mounted backlight module according to claim 4, characterized in that, The limiting groove has a first end and a second end at both ends in a direction perpendicular to the wall of the limiting groove; the first hanging plate is located at the first end and is in clearance fit with the first end; the first hanging plate is located at the first end and is in clearance fit with the first end.

6. The vehicle-mounted backlight module according to claim 4, characterized in that, The first hanging plate, the hanging body, and the connecting part of the body form a first hanging angle portion, and the second hanging plate, the hanging body, and the connecting part of the body form a second hanging angle portion. Both the first hanging angle portion and the second hanging angle portion are set with rounded corner structures.

7. The vehicle-mounted backlight module according to claim 6, characterized in that, The first stop portion has a rounded corner corresponding to the first abutment angle portion, and the second stop portion has a rounded corner corresponding to the second abutment angle portion.

8. The vehicle-mounted backlight module according to claim 3, characterized in that, The abutment part has an abutment surface facing the first stop part and the second stop part. The abutment part also has an abutment top surface and an abutment bottom surface. The abutment bottom surface is disposed facing the bottom of the limiting groove. The first stop portion has a first stop surface facing the abutment portion; The second stop portion has a second stop surface facing the abutment portion; The hanging surface is gradually moved closer to the first stop surface and the second stop surface from the top surface to the bottom surface of the hanging surface. Both the first stop surface and the second stop surface are moved away from the hanging surface along the direction from the opening of the limiting groove to the bottom of the groove.

9. The vehicle-mounted backlight module according to any one of claims 1-8, characterized in that, Stress relief notches are provided on the iron frame bodies on both sides of several of the aforementioned hanging platform structures; A double-sided adhesive strip is also provided between the hanging platform structure and the limiting structure.

10. A vehicle-mounted display device, characterized in that, The vehicle-mounted display device includes the vehicle-mounted backlight module as described in any one of claims 1-9.

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