Ceiling screen backlight module and display device

Abstract

The utility model relates to a ceiling screen backlight module and a display device.The ceiling screen backlight module comprises a bottom plate, a light guide plate and a middle frame, first elastic limiting blocks are arranged at the two ends of an installation groove of the bottom plate, and second elastic limiting blocks are arranged on the first side of the installation groove; the light guide plate abuts against the first elastic limiting block and the second elastic limiting block, so that the light guide plate can be installed in the installation groove in an interference fit mode, and the light guide plate can be stably installed on the bottom plate. Meanwhile, first embedding blocks at the two ends of the light guide plate are embedded in first embedding grooves in first elastic limiting blocks, and second embedding blocks on the first side of the light guide plate are embedded in second embedding grooves in second elastic limiting blocks, so that the light guide plate can be further limited, the light guide plate can be more stably mounted on the bottom plate, and the light guide effect is improved. The situation that the light guide plate loosens and falls off when the ceiling screen backlight module is used can be avoided, and therefore the ceiling screen backlight module has the good display effect.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal backlight, in particular to a ceiling screen backlight module and a display device. Background Art

[0002] At present, LED backlight technology is widely used in in-vehicle instrument displays because of its long service life and low power consumption. Common backlight modules are made by fixing and welding LED flexible circuit boards on one or both sides of a light guide plate. When the light beam emitted by the LED passes through the sawtooth mesh and cylindrical dots on the light guide plate, it will be evenly distributed on the light guide plate to realize the display of the car instrument panel.

[0003] In the existing ceiling screen backlight module, the light guide plate is installed in the bottom frame. Due to its large size and heavy weight, it is greatly affected by gravity when in use, and it is easy to become loose and fall off from the bottom frame due to poor fixation, affecting the display effect of the ceiling screen backlight module. Utility Model Content

[0004] Based on this, it is necessary to provide a ceiling screen backlight module and a display device.

[0005] The utility model solves the above technical problems with the following technical solutions: A ceiling screen backlight module, comprising:

[0006] A bottom plate, wherein a mounting groove is formed on the bottom plate, first elastic limit blocks are respectively provided at both ends of the mounting groove, each of the first elastic limit blocks is provided with a first fitting groove, a second elastic limit block is provided on a first side of the mounting groove, and a second elastic limit block is provided with a second fitting groove;

[0007] A light guide plate, the light guide plate is arranged in the installation groove, first embedding blocks are respectively arranged at both ends of the light guide plate, each of the first embedding blocks is embedded in one of the first embedding grooves, and a second embedding block is arranged on the first side of the light guide plate, and the second embedding block is embedded in the second embedding groove;

[0008] The middle frame is buckled on the bottom plate, and the middle frame is movably abutted against the edges of the light guide plate.

[0009] In one embodiment, an adhesive layer is disposed in the mounting groove, a first surface of the adhesive layer is connected to the bottom of the mounting groove, and a second surface of the adhesive layer is connected to the first surface of the light guide plate.

[0010] In one embodiment, a reflective film is disposed on the light guide plate, a first surface of the reflective film is connected to the first surface of the light guide plate, and a second surface of the reflective film is connected to the second surface of the adhesive layer.

[0011] In one embodiment, a flexible circuit board is provided on the second side of the mounting groove, the flexible circuit board is aligned with the second side of the light guide plate, and a plurality of lamp beads are provided on a surface of the flexible circuit board facing the light guide plate, a reflective adhesive strip is provided on the reflective film, a first surface of the reflective adhesive strip is connected to a first surface of the reflective film, a second surface of the reflective adhesive strip is connected to a first surface of the light guide plate, a plurality of lamp avoidance ports are provided on the reflective adhesive strip, and each of the lamp beads is aligned with one of the lamp avoidance ports.

[0012] In one embodiment, the ceiling screen backlight module also includes: an optical film, the optical film is connected to the second surface of the light guide plate, a film limiting column is arranged on the second surface of the light guide plate, a first limiting hole is opened on the optical film, and the film limiting column is embedded in the first limiting hole.

[0013] In one embodiment, a second limiting hole is formed on the middle frame, the second limiting hole is aligned with the first limiting hole, and the diaphragm limiting column is embedded in the first limiting hole and the second limiting hole.

[0014] In one embodiment, the number of the second elastic limiting blocks is set to two or more, and the number of the second engaging blocks is equal to the number of the second elastic limiting blocks.

[0015] In one embodiment, first limiting grooves are respectively formed on both ends of the installation groove, and each of the first elastic limiting blocks is installed in one of the first limiting grooves.

[0016] In one embodiment, a second limiting groove is formed on the first side of the installation groove, and the second elastic limiting block is installed in the second limiting groove.

[0017] The utility model also provides a display device, comprising the ceiling screen backlight module described in any one of the above embodiments.

[0018] The beneficial effect of the utility model is as follows: the utility model provides a ceiling screen backlight module, by setting the first elastic limit block on the two ends of the mounting groove of the bottom plate, the second elastic limit block is set on the first side of the mounting groove, and the light guide plate is respectively abutted against the first elastic limit block and the second elastic limit block, so that the light guide plate can be installed in the mounting groove by interference fit, and the light guide plate can be stably installed on the bottom plate. At the same time, the first interlocking blocks on the two ends of the light guide plate are interlocked in the first interlocking groove on the first elastic limit block, and the second interlocking block on the first side of the light guide plate is interlocked in the second interlocking groove on the second elastic limit block, which can further limit the light guide plate, and the light guide plate can be more stably installed on the bottom plate, and the ceiling screen backlight module can be prevented from loosening and falling off when in use, so that the ceiling screen backlight module has a better display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic structural diagram of a ceiling screen backlight module according to an embodiment;

[0021] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 3 for Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0023] Figure 4 A schematic diagram of the structure of a light guide plate, a reflective film and an optical film according to an embodiment;

[0024] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0025] Figure 6 for Figure 4 Schematic diagram of the enlarged structure at D in the middle.

[0026] In the accompanying drawings, 10, ceiling screen backlight module; 100, bottom plate; 101, mounting groove; 110, first elastic limit block; 111, first interlocking groove; 120, second elastic limit block; 121, second interlocking groove; 130, adhesive layer; 200, light guide plate; 210, first interlocking block; 220, second interlocking block; 230, diaphragm limit column; 300, middle frame; 310, second limit hole; 400, reflective film; 410, reflective adhesive strip; 411, avoidance lamp socket; 500, optical diaphragm; 510, first limit hole. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The technical solution of the present invention will be further described below in conjunction with the drawings of the embodiments of the present invention, and the present invention is not limited to the following specific implementation methods.

[0028] It should be understood that the same or similar numbers in the drawings of the embodiments correspond to the same or similar parts. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom" and the like indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] In one embodiment, Figure 1 , Figure 2 and Figure 3 As shown, a ceiling screen backlight module 10 includes: a bottom plate 100, a light guide plate 200 and a middle frame 300, the bottom plate 100 is provided with a mounting groove 101, and first elastic limit blocks 110 are respectively provided at both ends of the mounting groove 101, and each of the first elastic limit blocks 110 is provided with a first fitting groove 111, a second elastic limit block 120 is provided on a first side of the mounting groove 101, and a second elastic limit block 120 is provided with a second fitting groove 121, and the guide plate 200 is provided with a second fitting groove 121. The light plate 200 is arranged in the installation groove 101, and the first embedding blocks 210 are respectively arranged at both ends of the light guide plate 200, and each of the first embedding blocks 210 is embedded in one of the first embedding grooves 111. A second embedding block 220 is arranged on the first side of the light guide plate 200, and the second embedding block 220 is embedded in the second embedding groove 121. The middle frame 300 is buckled on the bottom plate 100, and the middle frame 300 is movably abutted against the four edges of the light guide plate 200.

[0030] In this embodiment, the material of the first elastic limit block 110 is silicone or rubber, and the material of the second elastic limit block 120 is silicone or rubber. The first elastic limit block 110 is arranged on both ends of the mounting groove 101 of the base plate 100. The first elastic limit blocks 110 located at both ends of the mounting groove 101 are arranged in a one-to-one correspondence, and the second elastic limit block 120 is arranged on the first side of the mounting groove 101. The light guide plate 200 is respectively abutted against the first elastic limit block 110 and the second elastic limit block 120. In this way, the light guide plate 200 can be installed in the mounting groove 101 by interference fit, and the light guide plate 200 can be stably installed on the base plate 100. At the same time, the first interlocking blocks 210 on both ends of the light guide plate 200 are interlocked in the first interlocking groove 111 on the first elastic limiting block 110, and the second interlocking block 220 on the first side of the light guide plate 200 is interlocked in the second interlocking groove 121 on the second elastic limiting block 120, which can further limit the light guide plate 200, that is, it can limit the movement of the light guide plate 200 in the X-axis, Y-axis and Z-axis directions. The light guide plate 200 can be more stably installed on the base plate 100, and the light guide plate 200 can be prevented from loosening and falling off when the ceiling screen backlight module 10 is in use, so that the ceiling screen backlight module 10 has a better display effect.

[0031] In one embodiment, Figure 1 As shown, an adhesive layer 130 is disposed in the mounting groove 101, a first surface of the adhesive layer 130 is connected to the bottom of the mounting groove 101, and a second surface of the adhesive layer 130 is connected to the first surface of the light guide plate 200. Specifically, the adhesive layer 130 is located on the bottom of the second side of the mounting groove 101, and the adhesive layer 130 can adhere and fix the light guide plate 200 to the bottom plate 100, and can further limit the movement of the light guide plate 200 in the X-axis, Y-axis and Z-axis directions, and play a role in limiting the light guide plate 200, so that the light guide plate 200 can be more stably installed on the bottom plate 100.

[0032] In one embodiment, Figure 4 As shown, a reflective film 400 is disposed on the light guide plate 200, a first surface of the reflective film 400 is connected to the first surface of the light guide plate 200, and a second surface of the reflective film 400 is connected to the second surface of the adhesive layer 130. Specifically, the reflective film 400 can reflect the light beam transmitted from the first surface of the light guide plate 200 to the second surface of the light guide plate 200, which can reduce light loss, is conducive to improving the utilization rate of the light source, plays a role in improving the brightness of the ceiling screen backlight module 10, and at the same time makes the light emitted by the lamp beads more divergent and more uniform.

[0033] In one embodiment, Figure 4 and Figure 5As shown, a flexible circuit board is arranged on the second side of the mounting groove 101, and the flexible circuit board is aligned with the second side of the light guide plate 200, and a plurality of lamp beads are arranged on the side of the flexible circuit board facing the light guide plate 200, and a reflective adhesive strip 410 is arranged on the reflective film 400, and the first side of the reflective adhesive strip 410 is connected to the first side of the reflective film 400, and the second side of the reflective adhesive strip 410 is connected to the first side of the light guide plate 200, and a plurality of lamp avoidance ports 411 are opened on the reflective adhesive strip 410, and each of the lamp beads is aligned with one of the lamp avoidance ports 411. Specifically, the ceiling screen backlight module 10 is a side-entry backlight module, the light incident side of the light guide plate 200 is the side of the light guide plate 200 facing the lamp beads, that is, the light incident side of the light guide plate 200 is the second side of the light guide plate 200, and the reflective film 400 is connected to the light guide plate 200 through the reflective adhesive strip 410. When the second side of the light guide plate 200 is aligned with the flexible circuit board, the lamp beads on the flexible circuit board are aligned with the avoidance lamp sockets 411. Each lamp bead corresponds to an avoidance lamp socket 411, which can prevent the ceiling screen backlight module 10 from having uneven brightness and darkness, and can improve the optical effect in front of the lamp, thereby making the overall optical effect of the ceiling screen backlight module 10 good.

[0034] In one embodiment, Figure 4 and Figure 6 As shown, the ceiling screen backlight module 10 further includes: an optical film 500, the optical film 500 is connected to the second surface of the light guide plate 200, a film limiting column 230 is arranged on the second surface of the light guide plate 200, a first limiting hole 510 is opened on the optical film 500, and the film limiting column 230 is embedded in the first limiting hole 510. Specifically, the optical film 500 is a film that can enhance or improve the optical effect of the light guide plate 200. For example, the optical film 500 is a diffuser film that can diffuse and propagate the light scattering conducted from the light guide plate 200. By expanding the diffusion angle, the problem of uneven brightness can be overcome to achieve uniform light emission from the surface light source. For another example, the optical film 500 is a light-enhancing film, which can gather the scattered light transmitted by the light-scattering film toward the front direction, further homogenize the light source and correct the light source, and play a role in improving the brightness. For another example, the optical film 500 is a combined film of a light-scattering film and a light-enhancing film, the first surface of the light-scattering film is connected to the second surface of the light guide plate 200, and the light-enhancing film is connected to the second surface of the light-scattering film, so that the optical effect of the light guide plate 200 can be compositely enhanced. It is worth noting that the type and quantity of the optical film 500 can be selected according to the optical effect to be enhanced or improved by the light guide plate 200, and are not specifically limited in this embodiment. At the same time, by the film limiting column 230 on the light guide plate 200 being embedded in the first limiting hole 510 on the optical film 500, the optical film 500 can be limited and fixed, and the displacement of the optical film 500 can be avoided.

[0035] In one embodiment, Figure 3 As shown, the middle frame 300 is provided with a second limiting hole 310, the second limiting hole 310 is aligned with the first limiting hole 510, and the diaphragm limiting column 230 is embedded in the first limiting hole 510 and the second limiting hole 310. Specifically, the number of the second limiting holes 310, the number of the first limiting holes 510 and the number of the diaphragm limiting columns 230 are equal, and the diaphragm limiting columns 230 are embedded in the first limiting holes 510 and the second limiting holes 310, so that the middle frame 300 can be further limited and fixed.

[0036] In one embodiment, Figure 1 As shown, the number of the second elastic limiting blocks 120 is set to two or more, and the number of the second engaging blocks 220 is equal to the number of the second elastic limiting blocks 120. Specifically, each second elastic limiting block 120 is evenly distributed on the first side of the mounting groove 101, each second engaging block 220 is evenly distributed on the first side of the light guide plate 200, and each second engaging block 220 is engaged in the second engaging groove 121 of a second elastic limiting block 120, which can better limit the light guide plate 200, and can further prevent the light guide plate 200 from loosening and falling off when the ceiling screen backlight module 10 is in use.

[0037] In one embodiment, first limiting grooves are respectively provided at both ends of the installation groove 101, each of the first elastic limiting blocks 110 is installed in one of the first limiting grooves, a second limiting groove is provided on the first side of the installation groove 101, and the second elastic limiting block 120 is installed in the second limiting groove. Specifically, the first elastic limiting block 110 is arranged in the first limiting groove, and the second elastic limiting block 120 is arranged in the second limiting groove, so that the contact area between the first elastic limiting block 110 and the second elastic limiting block 120 and the side wall of the installation groove 101 can be increased, so that the first elastic limiting block 110 and the second elastic limiting block 120 can be stably fixed in the installation groove 101.

[0038] The utility model also provides a display device, including the ceiling screen backlight module 10 described in any of the above embodiments. In this embodiment, the display device is a liquid crystal panel, and the display device also includes a circuit board, a liquid crystal display screen and an outer frame. The ceiling screen backlight module 10 is arranged on the circuit board, and is installed and fixed on the circuit board through mounting feet and fixing feet. The liquid crystal display screen is fixed on the ceiling screen backlight module 10, and the outer frame is arranged around the outside of the ceiling screen backlight module 10. It should be understood that the display device may also include other components, which are not described here in detail.

[0039] Compared with the prior art, the utility model has at least the following advantages:

[0040] The utility model provides a ceiling screen backlight module, by setting the first elastic limit block on the two ends of the installation groove of the bottom plate, the second elastic limit block is set on the first side of the installation groove, and the light guide plate is respectively abutted against the first elastic limit block and the second elastic limit block, so that the light guide plate can be installed in the installation groove by interference fit, and the light guide plate can be stably installed on the bottom plate. At the same time, the first embedding blocks on the two ends of the light guide plate are embedded in the first embedding groove on the first elastic limit block, and the second embedding block on the first side of the light guide plate is embedded in the second embedding groove on the second elastic limit block, which can further limit the light guide plate, and the light guide plate can be more stably installed on the bottom plate, and the ceiling screen backlight module can be prevented from loosening and falling off when in use, so that the ceiling screen backlight module has a better display effect.

[0041] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A ceiling screen backlight module, characterized in that: include: A bottom plate, wherein a mounting groove is formed on the bottom plate, first elastic limit blocks are respectively provided at both ends of the mounting groove, each of the first elastic limit blocks is provided with a first fitting groove, a second elastic limit block is provided on a first side of the mounting groove, and a second elastic limit block is provided with a second fitting groove; A light guide plate, the light guide plate is arranged in the installation groove, first embedding blocks are respectively arranged at both ends of the light guide plate, each of the first embedding blocks is embedded in one of the first embedding grooves, and a second embedding block is arranged on the first side of the light guide plate, and the second embedding block is embedded in the second embedding groove; The middle frame is buckled on the bottom plate, and the middle frame is movably abutted against the edges of the light guide plate.

2. The ceiling screen backlight module according to claim 1, characterized in that: An adhesive layer is arranged in the mounting groove, a first surface of the adhesive layer is connected to the bottom of the mounting groove, and a second surface of the adhesive layer is connected to the first surface of the light guide plate.

3. The ceiling screen backlight module according to claim 2, characterized in that: A reflective film is disposed on the light guide plate, a first surface of the reflective film is connected to the first surface of the light guide plate, and a second surface of the reflective film is connected to the second surface of the adhesive layer.

4. The ceiling screen backlight module according to claim 3, characterized in that: A flexible circuit board is arranged on the second side of the mounting groove, the flexible circuit board is aligned with the second side of the light guide plate, and a plurality of lamp beads are arranged on a surface of the flexible circuit board facing the light guide plate, a reflective adhesive strip is arranged on the reflective film, a first surface of the reflective adhesive strip is connected to the first surface of the reflective film, a second surface of the reflective adhesive strip is connected to the first surface of the light guide plate, a plurality of lamp avoidance ports are opened on the reflective adhesive strip, and each of the lamp beads is aligned with one of the lamp avoidance ports.

5. The ceiling screen backlight module according to claim 1, characterized in that: Also includes: An optical film is connected to the second surface of the light guide plate, a film limiting column is arranged on the second surface of the light guide plate, a first limiting hole is opened on the optical film, and the film limiting column is embedded in the first limiting hole.

6. The ceiling screen backlight module according to claim 5, characterized in that: The middle frame is provided with a second limiting hole, the second limiting hole is aligned with the first limiting hole, and the diaphragm limiting column is embedded in the first limiting hole and the second limiting hole.

7. The ceiling screen backlight module according to claim 1, characterized in that: The number of the second elastic limiting blocks is set to two or more, and the number of the second engaging blocks is equal to the number of the second elastic limiting blocks.

8. The ceiling screen backlight module according to claim 1, characterized in that: First limiting grooves are respectively formed on both ends of the installation groove, and each of the first elastic limiting blocks is installed in one of the first limiting grooves.

9. The ceiling screen backlight module according to claim 8, characterized in that: A second limiting groove is formed on the first side of the installation groove, and the second elastic limiting block is installed in the second limiting groove.

10. A display device, characterized in that: It comprises the ceiling screen backlight module described in any one of claims 1-9.

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