Backlight module structure capable of preventing light leakage

Abstract

The utility model relates to a backlight module structure of preventing light leakage, including frame, optical subassembly, FPC and light blocking strip, the frame includes cover frame and backboard, the cover frame is equipped with first opening, the edge of first opening bends inwards to form folding structure, the surface of cover frame is equipped with two reinforcing rib, and the back plate is equipped with two reinforcing ribs. The two reinforcing ribs are located on the two sides of the folding structure, a plurality of clamping holes are formed in the peripheral side of the cover frame, clamping ribs are formed between the clamping holes and the edge of the cover frame, sinking structures are arranged on the clamping ribs, a plurality of clamping blocks are arranged on the peripheral side of the back plate, and a mounting groove is formed in the inner side of the back plate. The optical assembly is installed in the installation groove and abuts against the reinforcing ribs. The light blocking strip is arranged around the installation groove, and a part of the light blocking strip extends and is attached to the optical assembly in the installation groove. The backlight module structure is high in structural stability, and the light leakage phenomenon can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to display technical field, specifically, relate to a light leakage prevention's backlight module structure. BACKGROUND

[0002] The backlight module is one of the key components of the liquid crystal display panel, and is located behind the liquid crystal display, used for supplying sufficient brightness and uniformly distributed light source for the liquid crystal display, so that it can normally display the image.

[0003] The backlight module usually comprises an outer frame and a backlight assembly in a laminated structure, the backlight assembly is installed inside the outer frame, the outer frame is composed of an upper frame and a lower frame by clamping, in order to facilitate assembly, the size of the upper frame, the lower frame and the backlight assembly has a gradient, which leads to the relative movement between each part after assembly, a large gap is generated, the stability of the whole structure is poor, and the gap also easily leads to light leakage, affecting the display effect, in addition, the backlight module is provided with an FPC (flexible circuit board), due to the product requirement, the FPC of part of the backlight module is in an unfolded structure, therefore, an opening for the FPC to install and pass through is reserved on the outer frame of the backlight module, and the strength of the opening is usually low, so that the overall strength of the outer frame is unbalanced, when the outer frame is assembled or the display screen is used and is impacted, the opening is easily slightly bent and deformed, the upper frame and the lower frame of the outer frame are not tightly matched, the assembly gap is enlarged, and the normal use of the module is affected. CONTENT

[0004] Therefore, the utility model provides a backlight module structure which can solve the above problems.

[0005] A light leakage prevention's backlight module structure, comprising: a frame, comprising a cover frame and a back plate, a first opening is arranged on one side edge of the cover frame, the edge of the first opening is inwardly bent to form a folding structure, two reinforcing ribs protruding towards the back plate are arranged on the surface of the cover frame, the two reinforcing ribs are located on the two sides of the folding structure, a plurality of clamping holes are arranged on the circumferential side of the cover frame, a clamping rib is formed between the edge of the cover frame and the clamping hole, a sunken structure recessed towards the inner side of the cover frame is arranged on the clamping rib, a plurality of clamping blocks are arranged on the circumferential side of the back plate, and a mounting groove is arranged on the inner side of the back plate; an optical assembly is mounted in the mounting groove, and the optical assembly is in abutment with the reinforcing ribs; a part of an FPC extends into the frame through the first opening; a light blocking strip is arranged between the cover frame and the back plate, the light blocking strip is arranged around the mounting groove, and a part of the light blocking strip extends and is attached to the optical assembly in the mounting groove.

[0006] The cover frame and the back plate are buckled and installed together through the clamping hole and the clamping block, the clamping rib on the bottom of the clamping hole is provided with a sinking structure, after the clamping hole and the clamping block are matched, the clamping rib can be abutted on the back plate through the sinking structure, the installation of the cover frame and the back plate is more compact, the gap is reduced, the relative movement between the cover frame and the back plate in the use process is reduced, and the stability of the overall structure is improved, the optical assembly is installed in the mounting groove of the back plate, a circle of light blocking strips is arranged around the edge of the mounting groove, the light blocking strips are pressed on the area between the mounting groove and the edge of the back plate through the cover frame, the width of the light blocking strips is greater than the width of the area, so that part of the light blocking strips extends and adheres to the optical assembly in the mounting groove, thereby the gap between the optical assembly and the mounting groove can be fully blocked, and light leakage is prevented.

[0007] In addition, the FPC of part of the backlight module is in an unfolded structure, is connected with an external control system through the FPC, and therefore an opening for mounting the FPC is usually reserved on the cover frame, the strength of the cover frame at the opening is weaker than that of other areas, and when assembled or subjected to external force, the opening is prone to bending or deformation, so that a gap is formed between the cover frame and the back plate, therefore, the edge of the first opening is bent inward to form a folded structure with a greater thickness, and a reinforcing rib is processed on both sides of the folded structure, so that the strength of the first opening can be significantly improved, and the structural stability in use can be improved, in addition, the reinforcing rib protrudes towards the back plate, and after the cover frame and the back plate are assembled, the reinforcing rib abuts against the top of the optical assembly in the mounting groove, so that the optical assembly can be pressed, the optical assembly is prevented from shaking in the interior, the gap is avoided, and the overall structure is more stable.

[0008] In one embodiment, the reinforcing rib is a structure formed on the surface of the cover frame, and the reinforcing rib and the cover frame are in an integrated structure.

[0009] In the above technical solution, the reinforcing rib is formed on the cover frame and is an integral part of the cover frame, and the reinforcing rib can be formed by stamping or integral molding.

[0010] In one embodiment, a second opening matched with the first opening is arranged on one side edge of the back plate.

[0011] In the above technical solution, after the cover frame and the back plate are assembled, the first opening is located outside the second opening, and the FPC is connected with the optical assembly in the interior through the first opening and the second opening.

[0012] In one embodiment, the light blocking strip is a lightproof PE film.

[0013] In the above technical solution, the light blocking strip is a lightproof PE film, so that the light blocking effect is ensured.

[0014] In one embodiment, the optical assembly comprises a polarizer, an upper diffusion sheet, a prism sheet, a lower diffusion sheet, a light guide plate and a reflection sheet arranged in sequence, and the reflection sheet is located at the bottom of the mounting groove.

[0015] In the technical scheme, the optical assembly is a multi-layer superposition structure, light emitted by the light source is conducted through the light guide plate, and then sequentially passes through the lower diffusion sheet, the prism sheet, the upper diffusion sheet and the polarizer to reach the display screen, the reflection sheet is located at the bottom of the mounting groove, and is used for reflecting the light leaking to the bottom back to increase the light utilization rate and increase the brightness.

[0016] In one embodiment, the optical assembly further comprises a light source strip, the light source strip is located at one side of the light guide plate, the light source strip is provided with a connecting portion extending to the outside of the frame, and the connecting portion is connected with the FPC.

[0017] In the technical scheme, the light source strip is arranged at one side of the light guide plate, light emitted by the light source strip is irradiated from the side surface of the light guide plate, and the light source strip is connected with the external FPC through the connecting portion to control the light emission of the light source strip.

[0018] In one embodiment, the cover frame and the back plate are both provided with connecting grooves for the connecting portion.

[0019] In the technical scheme, the connecting portion is connected with the external FPC through the connecting grooves of the cover frame and the back plate.

[0020] In one embodiment, the frame further comprises a middle frame arranged between the polarizer and the upper diffusion sheet.

[0021] In the technical scheme, the middle frame is arranged between the polarizer and the upper diffusion sheet, and is used for pressing the components in the optical assembly except the polarizer in the mounting groove.

[0022] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0023] The utility model discloses a light blocking strip is arranged between the cover frame and the back plate, the light blocking strip is pressed on the area between the mounting groove and the edge of the back plate through the cover frame, and part of the light blocking strip extends and is attached to the optical assembly in the mounting groove, so that the gap between the optical assembly and the mounting groove can be fully blocked, light leakage is prevented, and the display effect is ensured.

[0024] The first opening edge is bent to form a folding structure, and reinforcing ribs are processed on both sides of the folding structure, so that the strength of the first opening can be significantly enhanced, the cover frame can be prevented from being bent or deformed, and in addition, the reinforcing ribs can also press the optical assembly in the mounting groove, so that the overall structure is more stable.

[0025] This invention utilizes a sinking mechanism on the snap-fit ​​rib to make the fit between the cover frame and the back plate more compact, reducing the gap. At the same time, it can also reduce the relative movement between the cover frame and the back plate during use, thereby improving the stability of the overall structure. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 An exploded view of a backlight module structure according to an embodiment Figure 1 .

[0028] Figure 2 This is the bottom view of the cover frame.

[0029] Figure 3 for Figure 2 A magnified view of area A in the middle.

[0030] Figure 4 This is a 3D view of the backlight module structure.

[0031] Figure 5 for Figure 4 A magnified view of area B in the middle.

[0032] Figure 6 Explosion view of the backlight module structure Figure 2 .

[0033] Figure 7 Explosion view of the backlight module structure Figure 3 .

[0034] Figure 8 for Figure 7 A magnified view of region C.

[0035] Explanation of the reference numerals in the figure:

[0036] 1-Frame; 11-Cover frame; 111-Snap-fit ​​hole; 112-Snap-fit ​​rib; 1121-Sunken structure; 113-First opening; 114-Folding mechanism; 115-Reinforcing rib; 12-Back plate; 121-Mounting groove; 122-Snap-fit ​​block; 123-Second opening; 13-Connecting groove; 14-Middle frame; 2-Light blocking strip; 3-Optical component; 31-Polarizer; 311-Mounting part; 32-Upper diffuser; 33-Prism sheet; 34-Lower diffuser; 35-Light guide plate; 36-Reflector; 37-Light source strip; 371-Connecting part; 4-FPC. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] Please refer to Figures 1 to 8 This embodiment provides a backlight module structure that prevents light leakage, which includes a frame 1, an optical component 3 disposed within the frame 1, and an FPC (4) located outside the frame 1. The frame 1 includes a cover frame 11 and a back plate 12. A first opening 113 is provided on one side of the cover frame 11. The edge of the first opening 113 is bent inward to form a folding mechanism 114. Two reinforcing ribs 115 protruding toward the back plate 12 are provided on the surface of the cover frame 11. The two reinforcing ribs 115 are located on both sides of the folding mechanism 114. A plurality of snap-fit ​​holes 111 are provided on the periphery of the cover frame 11. Snap-fit ​​ribs 11 are formed between the snap-fit ​​holes 111 and the lower edge of the cover frame 11. 2. The snap-fit ​​rib 112 is provided with a recessed structure 1121 that is recessed towards the inside of the cover frame 11. The periphery of the back plate 12 is provided with multiple snap-fit ​​blocks 122 corresponding to the snap-fit ​​holes 111. The inner side of the back plate 12 is provided with a mounting groove 121. The optical component 3 is installed in the mounting groove 121 and abuts against the reinforcing rib 115 on the cover frame 11. A part of the FPC (4) extends into the frame 1 through the first opening 113 for the FPC (4) to be installed. A light-blocking strip 2 is provided between the cover frame 11 and the back plate 12. The light-blocking strip 2 is arranged around the mounting groove 121. A part of the light-blocking strip 2 extends and attaches to the top of the optical component 3 in the mounting groove 121.

[0041] Specifically, the cover frame 11 and the back plate 12 are installed together by the clamping hole 111 and the clamping block 122, the clamping rib 112 at the bottom of the clamping hole 111 is provided with a sunken structure 1121, the sunken structure 1121 makes the middle part of the clamping rib 112 recessed towards the inside of the cover frame 11 by a distance, so that after the clamping hole 111 cooperates with the clamping block 122, the inside of the clamping rib 112 can abut against the back plate 12, the installation of the cover frame 11 and the back plate 12 is more compact, the gap is reduced, the relative movement between the cover frame 11 and the back plate 12 during use is reduced, the stability of the overall structure is improved, the optical assembly 3 is installed in the installation groove 121 of the back plate 12, the area between the installation groove 121 and the top edge of the back plate 12 is provided with the light blocking strip 2, the light blocking strip 2 is pressed on the back plate 12 by the cover frame 11, at the same time, the width of the light blocking strip 2 is greater than the width of the area, so that part of the light blocking strip 2 extends and adheres to the optical assembly 3 in the installation groove 121, so that the light blocking strip 2 can fully block the gap between the optical assembly 3 and the installation groove 121, and light leakage is prevented.

[0042] It should be noted that the FPC (4) of the backlight module is of an unfolded structure, the first opening 113 for installing the FPC (4) needs to be reserved on the cover frame 11, the strength of the cover frame 11 at the first opening 113 is weaker than that of other areas, when the assembly or the whole module is subjected to external force, the opening with weak strength is easy to be slightly bent and deformed, so that a gap is generated between the cover frame 11 and the back plate 12, affecting use, therefore, the edge of the first opening 113 of the present application is bent inward to form the folding mechanism 114 with a thickness greater than that of other areas, so as to balance the strength of the whole cover frame 11, at the same time, the reinforcing ribs 115 are processed on the surfaces of the cover frame 11 on both sides of the folding mechanism 114, so that the strength of the first opening 113 can be significantly enhanced, and the structural stability during use can be improved, in addition, the reinforcing ribs 115 protrude towards the back plate 12, after the cover frame 11 and the back plate 12 are assembled, the reinforcing ribs 115 abut against the top of the optical assembly 3 in the installation groove 121, so as to press the optical assembly 3, prevent it from shaking inside, avoid the generation of a gap, and make the overall structure more stable.

[0043] Preferably, the reinforcing ribs 115 and the cover frame 11 are an integral whole, the reinforcing ribs 115 can be formed by stamping on the top surface of the cover frame 11, or can be directly formed on the cover frame 11 by an integrated molding process when the cover frame 11 is manufactured.

[0044] Preferably, the light blocking strip 2 is a lightproof PE film, so as to ensure the light blocking effect, wherein, for example, Figure 1As shown, in order to facilitate installation, the side of the installation groove 121 connected with the FPC (4) is not provided with the light blocking strip 2, and the other three sides are all provided with the light blocking strip 2. It is worth mentioning that the side of the cover frame 11 close to the installation of the FPC (4) is wider, and after being installed with the back plate 12, it can shield the gap between the lower installation groove 121 and the optical component.

[0045] In another embodiment, the side of the installation groove 121 connected with the FPC (4) is also provided with the light blocking strip 2, which is arranged at intervals and used for giving space for the connecting groove 13 and the second opening 123.

[0046] Please refer to Figure 8 In this embodiment, the side of the back plate 12 is provided with the second opening 123 corresponding to the first opening 113, and after the cover frame 11 is assembled with the back plate 12, the first opening 113 and the second opening 123 are flush, the first opening 113 is located outside the second opening 123, and the FPC (4) extends into the frame 1 through the first opening 113 and the second opening 123, so as to be connected with the internal optical assembly 3.

[0047] Please refer to Figures 6 to 8 In this embodiment, according to Figure 6 As shown in the direction, the optical assembly 3 includes the polaroid 31, the upper diffusion sheet 32, the prism sheet 33, the lower diffusion sheet 34, the light guide plate 35 and the reflecting sheet 36 arranged in sequence from top to bottom, the reflecting sheet 36 is located at the bottom of the installation groove 121, one side of the light guide plate 35 is provided with the light source strip 37 which can emit light, the light emitted by the light source strip 37 is irradiated from the side of the light guide plate 35, is adjusted in direction through the light guide plate 35, and then passes through the lower diffusion sheet 34, the prism sheet 33, the upper diffusion sheet 32 and the polaroid 31 in sequence, and finally passes out from the cover frame 11 to reach the display screen, the reflecting sheet 36 is located at the bottom of the installation groove 121 and is used for reflecting the light leaking to the bottom back to be reused, so as to increase the utilization efficiency of the light, and at the same time, the reflecting sheet 36 can also play a role in increasing the display brightness.

[0048] Specifically, the side of the polaroid 31 close to the first opening 113 and the second opening 123 is provided with the installation part 311, and the part of the FPC (4) entering the frame 1 is installed on the installation part 311.

[0049] Preferably, the light source strip 37 is an LED light strip, the light source strip 37 is provided with the connecting part 371 extending to the outside of the frame 1, the cover frame 11 and the back plate 12 are provided with the connecting groove 13 through which the connecting part 371 passes, the connecting part 371 extends out of the frame 1 through the connecting groove 13, and the light source strip 37 is electrically connected with the FPC (4) through the connecting part 371, so that the light source strip 37 can be controlled to emit light through the FPC (4).

[0050] Please refer to Figure 6In the embodiment, the frame 1 further comprises a middle frame 14, which is arranged between the polarizer 31 and the upper diffusion sheet 32, and is used to press the components in the optical assembly 3 except the polarizer 31 into the mounting groove 121, and the polarizer 31 is placed on the middle frame 14.

[0051] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

[0052] In the description of the present application, it should be understood that the terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0053] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0054] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A light leakage preventing backlight module structure, characterized in that, The application relates to a frame, an optical assembly, an FPC and a light-blocking strip. The frame comprises a cover frame and a back plate, one side of the cover frame is provided with a first opening, the edge of the first opening is bent inward to form a folding structure, the surface of the cover frame is provided with two convex reinforcing ribs towards the back plate, the two reinforcing ribs are located on the two sides of the folding structure, the peripheral side of the cover frame is provided with a plurality of clamping holes, the clamping holes and the edge of the cover frame form clamping ribs, the clamping ribs are provided with sunken structures recessed towards the inner side of the cover frame, the peripheral side of the back plate is provided with a plurality of clamping blocks, and the inner side of the back plate is provided with a mounting groove. The optical assembly is installed in the mounting groove and abuts against the reinforcing ribs. Part of the FPC extends into the frame through the first opening. The light-blocking strip is arranged between the cover frame and the back plate, surrounds the mounting groove, and part of the light-blocking strip extends and adheres to the optical assembly in the mounting groove.

2. The light leakage preventing backlight module structure of claim 1, wherein, The reinforcing ribs are structures formed on the surface of the cover frame, and the reinforcing ribs and the cover frame are in an integral structure.

3. The light leakage preventing backlight module structure of claim 1, wherein, One side of the back plate is provided with a second opening matched with the first opening.

4. The light leakage preventing backlight module structure of claim 1, wherein, The light-blocking strip is a lightproof PE film.

5. The light leakage preventing backlight module structure of claim 1, wherein, The optical assembly comprises a polaroid, an upper diffusion sheet, a prism sheet, a lower diffusion sheet, a light guide plate and a reflecting sheet arranged in sequence, and the reflecting sheet is located at the bottom of the mounting groove.

6. The light leakage preventing backlight module structure of claim 5, wherein, The optical assembly further comprises a light source strip, the light source strip is located on one side of the light guide plate, the light source strip is provided with a connecting part extending to the outside of the frame, and the connecting part is connected with the FPC.

7. The light leakage preventing backlight module structure according to claim 6, wherein, The connecting grooves are formed in the side surfaces of the cover frame and the back plate for the connecting part to pass through.

8. The light leakage preventing backlight module structure of claim 5, wherein, The frame further comprises a middle frame arranged between the polaroid and the upper diffusion sheet.

Images