Shading structure of backlight module

Abstract

The utility model discloses a shading structure of a backlight module, which relates to the technical field of backlight modules and comprises a lower base, a first mounting groove is arranged on the side wall of the lower base, a spring is arranged in the lower base, one end of the spring is fixedly connected with the inner bottom wall of the first mounting groove, and the other end of the spring is fixedly connected with a clamping block. The side wall of the lower base is movably connected with an upper base in a sleeved mode, a clamping groove is formed in the side wall of the upper base, the clamping block is connected with the clamping groove in a clamped mode, a first clamping groove is formed in the lower end of the upper base, the lower base is located in the first clamping groove, and a backlight film assembly is arranged on the inner bottom wall of the lower base. The silver surface can effectively reflect light rays, improve the utilization efficiency of the light rays and reduce the loss and scattering of the light rays, so that the light leakage phenomenon is remarkably reduced, the backlight module is clearer and sharper during display, and light leakage at the edge of the backlight film assembly is reduced by utilizing the special shapes and connection states of the upper base and the lower base.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight modules, in particular to a light shielding structure of a backlight module. Background Art

[0002] The backlight module is a light source located behind the liquid crystal display. Its luminous effect will directly affect the visual effect of the liquid crystal display module. The liquid crystal display is a passive light-emitting element. The display screen itself does not emit light, but is illuminated by the backlight module below it. As one of the key components of the liquid crystal display, the backlight module has the main function of providing sufficient brightness and evenly distributed light source to the liquid crystal display, so that the liquid crystal display can display images normally. With the continuous development and innovation of liquid crystal display technology, liquid crystal displays are developing towards ultra-thin and narrow bezels. Accordingly, higher technical requirements are put forward for the brightness of the backlight module and the uniform distribution of the light source.

[0003] Chinese patent document CN206096700U discloses a backlight module with a shading structure, comprising a shading structure and a base plate, wherein the base plate is provided with a plastic frame, the plastic frame is tightly connected to the light guide plate, the light guide plate is provided with a slot, the slot is movably connected to the bayonet, the bayonet is fixedly connected to the shading mainboard, the shading mainboard is provided with a black and white shading sheet, the black and white shading sheet is tightly connected to the PET shading sheet, the shading mainboard is fixedly connected to the handle below, the bayonet is provided with a shading structure inside, the shading structure is provided with an LED light source inside, the LED light source is provided with a component slot below, the component slot is fixedly connected to the reinforcing rib, the reinforcing rib is provided with a fixed end below, and the base plate is provided with a cover plate. The above-mentioned backlight module with a shading structure has shortcomings. Although the device can achieve shading of the backlight module, it has limitations. It mainly uses black and white glue for shading. The black and white glue has relatively simple functions and cannot reflect light. It is not suitable for backlight modules that require light control and has a narrow scope of application.

[0004] Therefore, in order to solve such problems, we propose a light shielding structure of a backlight module. Utility Model Content

[0005] The purpose of the present invention is to provide a shading structure for a backlight module, aiming to solve the problem in the above-mentioned background technology that the existing backlight module with a shading structure cannot reflect light due to the relatively single function of the black and white film during use, and has a small scope of application.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a light shading structure of a backlight module, comprising a lower base, wherein the side wall of the lower base is provided with a first installation groove, a spring is provided inside the lower base, the spring is located in the first installation groove, and one end of the spring is fixedly connected to the bottom wall of the first installation groove, the other end of the spring is fixedly connected to a clamping block, the clamping block is slidably connected to the inner wall of the first installation groove, the side wall of the lower base is movably sleeved on the upper base, the side wall of the upper base is provided with a clamping groove, the clamping block is clamped and connected to the clamping groove, the lower end of the upper base is provided with a first clamping groove, the lower base is located in the first clamping groove, and the inner bottom wall of the lower base is provided with a backlight film assembly, the backlight film assembly includes a light guide plate, the light guide plate is fixedly connected to the inner bottom wall of the lower base, the upper surface of the light guide plate is bonded with a lower light-enhancing sheet, the upper end of the lower light-enhancing sheet is bonded with the upper light-enhancing sheet, and the upper end of the upper light-enhancing sheet is bonded with a black-silver light-shielding sheet.

[0007] Preferably, a second clamping groove is provided at the upper end of the lower base, and a clamping frame is fixedly connected to the lower end of the upper base, and the clamping frame is clamped and connected to the second clamping groove.

[0008] Preferably, a black light-shielding frame is fixedly connected to the lower end of the upper base, and the lower end of the black light-shielding frame abuts against the upper surface of the black-silver light-shielding sheet.

[0009] Preferably, a rubber frame is provided inside the upper base, and the rubber frame is fixedly connected to the top wall of the first clamping groove.

[0010] Preferably, one end of the clamping block away from the spring is provided with a rounded corner.

[0011] Preferably, one end of the clamping block away from the spring is located in the clamping groove.

[0012] The utility model has the following beneficial effects:

[0013] In the present invention, firstly, a black and silver shading sheet is used instead of black and white tape to achieve shading while enhancing the light reflection ability. The silver surface can effectively reflect light, improve the utilization efficiency of light, reduce the loss and scattering of light, thereby significantly reducing light leakage, and making the backlight module clearer and sharper when displaying. Secondly, the black and silver shading sheet also integrates thermal conductivity, which helps to quickly dissipate the heat inside the backlight module, improve the overall heat dissipation efficiency, and extend the service life of the product. Secondly, the special shape and connection state of the upper base and the lower base are utilized to reduce light leakage at the edge of the backlight film assembly, making the backlight module more uniform and consistent when displaying, further improving the display effect. Secondly, by utilizing the engagement of the card block and the card slot, and the elastic characteristics of the rubber frame, the connection between the upper base and the lower base is more stable and reliable, reducing the risk of performance degradation or failure due to loose connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1This is a three-dimensional schematic diagram of a light-shielding structure of a backlight module proposed in the present invention;

[0015] Figure 2 This is a three-dimensional exploded schematic diagram of the lower base in the light-shielding structure of the backlight module proposed in the present invention;

[0016] Figure 3 This is a three-dimensional exploded schematic diagram of an upper base in a light-shielding structure of a backlight module proposed in the present invention;

[0017] Figure 4 This is a three-dimensional exploded schematic diagram of a backlight film assembly in a light-shielding structure of a backlight module proposed in the present invention.

[0018] Legend:

[0019] 1. Lower base; 11. Second snap-in slot; 12. First mounting slot; 13. Spring; 14. Block; 2. Upper base; 201. Slot; 21. First snap-in slot; 22. Snap-in frame; 23. Black shading frame; 24. Rubber frame; 3. Backlight film assembly; 31. Light guide plate; 32. Lower brightening sheet; 33. Upper brightening sheet; 34. Black-silver shading sheet. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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.

[0021] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," "outside," etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are used only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific position, be constructed and operate in a specific position. Therefore, they should not be understood as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrally connected. They can be mechanically connected or electrically connected. They can be directly connected, indirectly connected through an intermediate medium, or can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0022] Reference Figure 1-4 The utility model provides an embodiment: a light shielding structure of a backlight module, including a lower base 1, a first mounting groove 12 is opened on the side wall of the lower base 1, a spring 13 is arranged inside the lower base 1, the spring 13 is located in the first mounting groove 12, and one end of the spring 13 is fixedly connected to the bottom wall of the first mounting groove 12, and the other end of the spring 13 is fixedly connected to a clamping block 14, the clamping block 14 is slidably connected to the inner wall of the first mounting groove 12, the side wall of the lower base 1 is movably sleeved with an upper base 2, and the side wall of the upper base 2 is opened. There is a card slot 201, the card block 14 is engaged with the card slot 201, a first card slot 21 is opened at the lower end of the upper base 2, the lower base 1 is located in the first card slot 21, and a backlight film assembly 3 is provided on the inner bottom wall of the lower base 1. The backlight film assembly 3 includes a light guide plate 31, and the light guide plate 31 is fixedly connected to the inner bottom wall of the lower base 1. The upper surface of the light guide plate 31 is bonded with a lower brightening sheet 32, and the upper end of the lower brightening sheet 32 ​​is bonded with an upper brightening sheet 33, and the upper end of the upper brightening sheet 33 is bonded with a black silver light-shielding sheet 34.

[0023] The black-silver shading sheet 34 is set to be black on one side and silver on the other side. While achieving shading, the silver surface also has a reflective effect, which improves the utilization rate of light. By reflecting light and guiding it to propagate toward the target area, light scattering and light leakage are reduced. Secondly, the entire backlight film assembly 3 is set in the groove on the upper surface of the lower base 1, and the lower base 1 is used for shading to reduce light leakage at the edge of the backlight film assembly 3. When the lower base 1 and the upper base 2 are installed, the upper base 2 is placed directly above the lower base 1, and then the upper base 2 is pressed vertically downward, so that the lower base 1 is snapped into the first snap-in groove 21, and the snap block 14 is snapped into the snap slot 201, thereby achieving the limit between the lower base 1 and the upper base 2.

[0024] A second snap-in groove 11 is provided at the upper end of the lower base 1, and a snap-in frame 22 is fixedly connected to the lower end of the upper base 2. The snap-in frame 22 is snap-connected to the second snap-in groove 11. The close fit between the snap-in frame 22 and the second snap-in groove 11 effectively reduces the possibility of light leakage from the connection gap.

[0025] A black shading frame 23 is fixedly connected to the lower end of the upper base 2 , and the lower end of the black shading frame 23 abuts against the upper surface of the black silver shading sheet 34 to increase the shading rate at the connection between the upper base 2 and the backlight film assembly 3 .

[0026] A rubber frame 24 is provided inside the upper base 2, and the rubber frame 24 is fixedly connected to the top wall of the first clamping groove 21. The rubber frame 24 is used to utilize the elastic force of the rubber frame 24 to make the lower base 1 and the upper base 2 more stably clamped, thereby avoiding shaking between the lower base 1 and the upper base 2.

[0027] One end of the clamping block 14 away from the spring 13 is provided with a rounded corner to facilitate the quick engagement of the clamping block 14 and the clamping slot 201 .

[0028] The end of the block 14 away from the spring 13 is located in the slot 201 , which is used to increase the smoothness of the side wall of the upper base 2 and prevent the protruding portion of the block 14 from affecting the coordination and installation with other components.

[0029] Working principle: First, the black silver shading sheet 34 realizes shading while the silver surface also has a reflective effect. By reflecting the light and guiding it to propagate toward the target area, the scattering and leakage of light are reduced. Secondly, the entire backlight film assembly 3 is set in the groove on the upper surface of the lower base 1, and the lower base 1 is used for shading to reduce the light leakage at the edge of the backlight film assembly 3. When the lower base 1 and the upper base 2 are installed, the upper base 2 is placed directly above the lower base 1, and then the upper base 2 is pressed vertically downward. The lower base 1 is snapped into the first snap-in groove 21, and the snap block 14 is snapped into the snap-in groove 201 at the same time, thereby realizing the limitation between the lower base 1 and the upper base 2. Secondly, the snap-in frame 22 is tightly fitted with the second snap-in groove 11, thereby effectively reducing the possibility of light leakage from the connection gap.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A light shielding structure of a backlight module, comprising a lower base (1), characterized in that: The side wall of the lower base (1) is provided with a first mounting groove (12), a spring (13) is provided inside the lower base (1), the spring (13) is located in the first mounting groove (12), and one end of the spring (13) is fixedly connected to the bottom wall of the first mounting groove (12), the other end of the spring (13) is fixedly connected to a clamping block (14), the clamping block (14) is slidably connected to the inner wall of the first mounting groove (12), the side wall of the lower base (1) is movably sleeved with the upper base (2), the side wall of the upper base (2) is provided with a clamping groove (201), the clamping block (14) is connected to the clamping groove (2 01) snap-fit ​​connection, the lower end of the upper base (2) is provided with a first snap-fit ​​groove (21), the lower base (1) is located in the first snap-fit ​​groove (21), the inner bottom wall of the lower base (1) is provided with a backlight film assembly (3), the backlight film assembly (3) includes a light guide plate (31), the light guide plate (31) is fixedly connected to the inner bottom wall of the lower base (1), the upper surface of the light guide plate (31) is bonded with a lower light-enhancing sheet (32), the upper end of the lower light-enhancing sheet (32) is bonded with an upper light-enhancing sheet (33), and the upper end of the upper light-enhancing sheet (33) is bonded with a black silver light-shielding sheet (34).

2. The light shielding structure of a backlight module according to claim 1, wherein: The upper end of the lower base (1) is provided with a second clamping groove (11), and the lower end of the upper base (2) is fixedly connected with a clamping frame (22), which is clamped and connected with the second clamping groove (11).

3. The light shielding structure of a backlight module according to claim 1, wherein: The lower end of the upper base (2) is fixedly connected to a black light-shielding frame (23), and the lower end of the black light-shielding frame (23) abuts against the upper surface of the black silver light-shielding sheet (34).

4. The light shielding structure of a backlight module according to claim 1, wherein: A rubber frame (24) is provided inside the upper base (2), and the rubber frame (24) is fixedly connected to the inner top wall of the first clamping groove (21).

5. The light shielding structure of a backlight module according to claim 1, wherein: One end of the clamping block (14) away from the spring (13) is provided with a rounded corner.

6. The light shielding structure of a backlight module according to claim 1, wherein: The end of the clamping block (14) away from the spring (13) is located in the clamping groove (201).

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