Diffusion plate with multipurpose limiting structure for direct type backlight module

Abstract

The utility model relates to the technical field of panel display, in particular to a direct type backlight module diffusion plate with a multipurpose limiting structure, which comprises an outer frame, a diaphragm group, a diffusion plate, a reflecting cover, an LED lamp panel and a base, a boss structure is arranged in the Z direction of the diffusion plate, the boss structure comprises a Z-direction upward boss structure and a Z-direction downward boss structure, and the Z-direction upward boss structure and the Z-direction downward boss structure are arranged on the base. The Z-direction upward boss structure is matched with the diaphragm set for positioning and limiting, and the Z-direction downward boss structure is matched with the diffusion plate for positioning and limiting. The utility model discloses a Z-direction limiting structure which is used for protecting a diffusion plate and improving the narrow frame design and reliability of a direct type backlight module. The structure ensures that the diffusion plate is kept at an accurate position during assembly and use, light effect loss and structural damage are avoided, the module performance and the production yield are improved, meanwhile, the production cost is reduced, and the market competitiveness is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of panel display, in particular to a diffusion plate of a direct-type backlight module with a multi-purpose limiting structure. Background Art

[0002] At present, liquid crystal display devices, as visual output components of electronic devices, have been widely used in various electronic products. Among them, the backlight module, as a key component of the liquid crystal display device, is mainly divided into an edge-entry backlight module and a direct-type backlight module according to the different incident positions of the light source. The direct-type backlight module places the light source, such as a cold cathode fluorescent lamp (CCFL) or a light-emitting diode (LED), behind the display panel, converting the linear light source into a surface light source for use by the display panel. At present, the structure of the module is mainly composed of a base, a lamp board, a reflector, a diffuser plate and a diaphragm group, among which the diffuser plate is mainly made of foam extrusion or injection molding process, and its structural form is basically a flat plate.

[0003] The diaphragm assembly is typically secured to the base using double-sided tape, with ample clearance around the edges to accommodate thermal expansion and assembly errors. The diffuser plate is connected to the base using a positioning mechanism and secured with double-sided tape around the edges, also taking thermal expansion and assembly errors into account and allowing for adequate clearance.

[0004] However, this structure has several drawbacks: First, the large gaps around the edges create significant cumulative errors, leading to poor center alignment. To avoid poor lighting effects when viewed from the side, the bezel width must be designed to be wider, which is inconsistent with the current trend towards narrow bezels in product design. Second, the backlight module must meet strict reliability testing standards, and components expand and contract with changing ambient temperatures. The deformation direction of components is affected by assembly errors and pressure, resulting in large displacement between components and increasing the risk of friction and scratches.

[0005] In response to the above problems, this paper proposes an improved solution, that is, the direct-lit backlight module adopts a diffusion plate with a multifunctional positioning structure. Utility Model Content

[0006] In view of the deficiencies in the prior art, the present invention discloses a diffusion plate of a direct-lit backlight module having a multi-purpose limiting structure, which is used to solve the above-mentioned problems.

[0007] The utility model is achieved through the following technical solutions:

[0008] The utility model provides a direct-type backlight module with a diffuser plate having a multi-purpose limiting structure, including an outer frame, a diaphragm group, a diffuser plate, a reflective cover, an LED light board and a base. The diffuser plate is provided with a boss structure in the Z direction, and the boss structure includes a Z-direction upward boss structure and a Z-direction downward boss structure. The Z-direction upward boss structure cooperates with the diaphragm group for positioning and limiting, and the Z-direction downward boss structure cooperates with the diffuser plate for positioning and limiting.

[0009] Furthermore, the outer frame, diaphragm group, diffuser plate, reflector cover, LED light board and base are arranged in sequence from top to bottom.

[0010] Furthermore, the diffuser plate is fixedly connected to the reflector cover via a diffuser plate fixing tape.

[0011] Furthermore, the reflector is fixedly connected to the LED light board via a reflector fixing tape.

[0012] Furthermore, the LED light board is fixedly connected to the base via LED light board fixing glue.

[0013] Furthermore, a stopper structure is provided on the side of the Z-upward boss structure, and the stopper structure is used to limit the upper and lower positions of the diaphragm group.

[0014] Furthermore, there is a yield structure below the stop block.

[0015] The beneficial effects of the utility model are:

[0016] This utility model relates to a Z-direction retaining structure for protecting a diffuser plate. This structure significantly improves the narrow-frame design and high reliability requirements of direct-lit backlight modules. By adopting this unique structural design, we can more effectively meet the narrow-frame and high-reliability requirements of direct-lit backlight modules. Specifically, this Z-direction retaining structure ensures that the diffuser plate maintains precise position during assembly and use, thereby preventing loss of light efficiency or structural damage due to positional deviation.

[0017] This not only improves the overall performance of direct-lit backlight modules, but also increases production yields and reduces losses due to defective products. Furthermore, by optimizing the structural design, overall production costs can be reduced, further enhancing the competitiveness of direct-lit backlight modules in the market. In short, this Z-axis limiter structure not only meets the narrow bezel and high reliability requirements of direct-lit backlight modules, but also brings multiple advantages in production efficiency and cost control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a direct-lit backlight module with a diffuser plate structure having a multi-purpose limiting structure;

[0020] Figure 2 It is a structural diagram of the boss structure of the utility model;

[0021] 1. Outer frame; 2. Diaphragm assembly; 3. Diffuser plate; 301. Diffuser plate fixing tape; 302. Z-axis upward boss structure; 303. Z-axis downward boss structure; 304. Yield structure; 4. Reflector; 401. Reflector fixing tape; 5. LED light board; 501. LED light board fixing glue; 6. Base. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Reference Figure 1 As shown, in this embodiment, we introduce a direct-lit backlight module equipped with a diffuser plate with a multi-purpose position-limiting structure. This diffuser plate is designed to improve overall structural stability and positioning accuracy. Specifically, the direct-lit backlight module includes several key components: an outer frame, a diaphragm assembly, a diffuser plate, a reflector, an LED light panel, and a base.

[0024] The diffuser plate features specially designed bosses in the Z-direction (i.e., vertical direction). These bosses are divided into two types: an upward Z-direction boss and a downward Z-direction boss. The upward Z-direction bosses precisely mate with the diaphragm assembly, thereby positioning and limiting the diaphragm assembly. This design ensures that the diaphragm assembly is stably fixed to the diffuser plate, ensuring that it does not shift during use.

[0025] At the same time, the Z-direction downward boss structure cooperates with the diffuser itself to position and limit the diffuser. This design ensures the vertical stability of the diffuser and avoids possible displacement or deformation during use.

[0026] In this embodiment, the components are arranged in the following order from top to bottom: outer frame, diaphragm assembly, diffuser, reflector, LED light board, and base. This arrangement helps to ensure the compactness of the structure and the coordination of functions of the entire backlight module.

[0027] In order to further enhance the fixing effect of the diffuser plate, this embodiment uses a diffuser plate fixing tape to fix the diffuser plate and the reflector together. This connection method is not only firm but also easy to disassemble and maintain.

[0028] Similarly, the reflector and the LED light panel are also fixed together by the reflector fixing tape. This design ensures a tight connection between the reflector and the LED light panel, thereby improving the overall light efficiency and stability of the backlight module.

[0029] The LED light panel is connected to the base using LED light panel fixing glue. This fixing glue has excellent adhesive properties and can ensure that the LED light panel is firmly fixed to the base, preventing it from loosening or falling off during use.

[0030] In this embodiment, the Z-direction upward boss structure also features specially designed side blocks. These blocks primarily limit the vertical position of the diaphragm assembly, ensuring it stays within a predetermined range. This design further improves the positioning accuracy of the diaphragm assembly, ensuring the overall performance of the backlight module.

[0031] Finally, a clearance structure is set under the stopper. This clearance structure is designed to provide sufficient space during installation and removal, making the diaphragm group more convenient to operate and avoiding unnecessary damage to the diaphragm group during installation.

[0032] In this embodiment, Figure 2 As shown, the diffuser plate is provided with a boss structure in the Z-axis direction. The boss structure extends upward, which can realize the positioning and limiting functions of the diaphragm group in the three directions of XYZ. The boss structure extending downward is responsible for the positioning and limiting between the diffuser plate and the base. Due to the small size of the boss structure, the thermal expansion and contraction deformation generated by it under temperature changes is also relatively small. Therefore, compared with the existing technology, the avoidance gap reserved in the diaphragm group design can be reduced accordingly, and the requirements for the frame width are also reduced. In addition, the relative displacement of the various components in the module under changes in ambient temperature, humidity and motion will also be reduced, thereby reducing the risk of quality problems such as scratches caused by friction.

[0033] like Figure 2 The diffuser plate's upwardly extending Z-axis boss structure forms side blocks that limit the upper and lower positions of the diaphragm assembly. This also reduces the amount of glue required for the corresponding Z-axis projection, facilitating mold ejection and positioning, thereby reducing mold complexity.

[0034] In summary, this utility model relates to a Z-direction retaining structure for protecting a diffuser plate. This structure significantly improves the narrow-frame design and high reliability requirements of direct-lit backlight modules. By adopting this unique structural design, we can more effectively meet the narrow-frame and high-reliability requirements of direct-lit backlight modules. Specifically, this Z-direction retaining structure ensures that the diffuser plate maintains its precise position during assembly and use, thereby preventing loss of light efficiency or structural damage due to positional deviation.

[0035] This not only improves the overall performance of direct-lit backlight modules, but also increases production yields and reduces losses due to defective products. Furthermore, by optimizing the structural design, overall production costs can be reduced, further enhancing the competitiveness of direct-lit backlight modules in the market. In short, this Z-axis limiter structure not only meets the narrow bezel and high reliability requirements of direct-lit backlight modules, but also brings multiple advantages in production efficiency and cost control.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A direct-lit backlight module with a diffuser plate having a multi-purpose limiting structure, comprising an outer frame, a diaphragm assembly, a diffuser plate, a reflector, an LED light panel, and a base, characterized in that: The diffuser plate is provided with a boss structure in the Z direction, which includes a Z-direction upward boss structure and a Z-direction downward boss structure. The Z-direction upward boss structure cooperates with the diaphragm group for positioning and limiting, and the Z-direction downward boss structure cooperates with the diffuser plate for positioning and limiting.

2. The direct-lit backlight module having a diffuser plate with a multi-purpose limiting structure according to claim 1, characterized in that: The outer frame, diaphragm group, diffusion plate, reflector, LED light board and base are arranged in sequence from top to bottom.

3. The direct-lit backlight module having a diffuser plate with a multi-purpose limiting structure according to claim 2, characterized in that: The diffusion plate is fixedly connected to the reflector by a diffusion plate fixing tape.

4. The direct-lit backlight module having a diffuser plate with a multi-purpose limiting structure according to claim 2, characterized in that: The reflector is fixedly connected to the LED light board via a reflector fixing tape.

5. The direct-lit backlight module having a diffuser plate with a multi-purpose limiting structure according to claim 2, characterized in that: The LED light board is fixedly connected to the base via LED light board fixing glue.

6. The direct-lit backlight module having a diffuser plate with a multi-purpose limiting structure according to claim 1, characterized in that: A stopper structure is provided on the side of the Z-direction upward boss structure, and the stopper structure is used to limit the upper and lower positions of the diaphragm group.

7. The direct-lit backlight module having a diffuser plate with a multi-purpose limiting structure according to claim 6, characterized in that: A yield structure is provided below the stop block.

Images