Special-shaped side-entry backlight module and display device

Abstract

The utility model relates to a special-shaped side-entry type backlight module and a display device, the special-shaped side-entry type backlight module comprises a bottom plate, a light bar, a reflecting film, a light guide plate and a middle frame, a heat-conducting glue layer is arranged on the light bar, a first surface of the heat-conducting glue layer is connected with the light bar, and a second surface of the heat-conducting glue layer is connected with a side wall of a mounting groove, so that the light bar is arranged on the bottom plate, and the reflecting film is arranged on the reflecting film. According to the special-shaped side-in type backlight module, the light bar can be fixed in the mounting groove of the bottom plate, heat generated when the light bar works can be better conducted to the bottom plate, the good heat dissipation effect is achieved, the situation that sawteeth of the light guide plate are melted, deformed or yellowed can be avoided, and therefore the special-shaped side-in type backlight module has the good optical grade.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal backlight, in particular to a special-shaped side-entry 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 side-entry backlight module, the light guide plate is installed in the bottom frame, and one side of the light guide plate is aligned with the light bar in the bottom frame. The heat generated by the light bar when working is easily transferred to the light guide plate, causing the light guide plate to become jagged, melted, deformed or yellowed, affecting the display effect of the backlight module. Utility Model Content

[0004] Based on this, it is necessary to provide a special-shaped side-entry backlight module and a display device.

[0005] The utility model solves the above technical problems with the following technical solutions: a special-shaped side-entry backlight module, comprising:

[0006] A bottom plate, wherein a mounting groove is formed on the bottom plate;

[0007] A light bar, wherein a heat-conducting adhesive layer is disposed on the light bar, a first surface of the heat-conducting adhesive layer is connected to a first surface of the light bar, a second surface of the heat-conducting adhesive layer is connected to a side wall of a first side of the mounting groove, and a plurality of lamp beads are disposed on the second surface of the light bar;

[0008] A reflective film, wherein a first surface of the reflective film is connected to a bottom side wall of the mounting groove;

[0009] A light guide plate, the light guide plate is arranged in the mounting groove, a first surface of the light guide plate is connected to a second surface of the reflective film, and a first side of the light guide plate is aligned with each of the lamp beads;

[0010] The middle frame is buckled on the bottom plate, and the middle frame is movably abutted against the edges of the light guide plate.

[0011] In one embodiment, a limiting boss is disposed on the first side of the light guide plate, and the limiting boss is movably abutted against the second surface of the light bar.

[0012] In one embodiment, an elastic limit block is provided in the installation groove, the first side of the elastic limit block is connected to the side wall of the second side of the installation groove, a limit groove is opened on the second side of the elastic limit block, and the second side of the light guide plate is embedded in the limit groove.

[0013] In one embodiment, a first adhesive layer is disposed on the reflective film, a first surface of the first adhesive layer is connected to the first surface of the reflective film, and a second surface of the first adhesive layer is connected to the bottom side wall of the mounting groove.

[0014] In one embodiment, a second adhesive layer is disposed on the reflective film, a first surface of the second adhesive layer is connected to a second surface of the reflective film, and a second surface of the first adhesive layer is connected to a first surface of the light guide plate.

[0015] In one embodiment, a reflective side film is provided on the light guide plate.

[0016] In one embodiment, a limiting plate is disposed on the middle frame, a limiting groove is provided on the side wall of the mounting groove, and the limiting plate is disposed in the limiting groove.

[0017] In one embodiment, a built-in protrusion is provided on the middle frame, a built-in groove is provided on the side wall of the mounting groove, and the built-in protrusion is embedded in the built-in groove.

[0018] In one embodiment, the special-shaped edge-entry backlight module also includes: an optical film assembly, a limiting column is arranged on the second surface of the light guide plate, the optical film assembly is arranged on the second surface of the light guide plate, and a limiting ear is provided on the optical film of the optical film assembly, and the limiting column is engaged in the limiting ear.

[0019] The utility model also provides a display device, comprising the special-shaped side-entry backlight module described in any one of the above embodiments.

[0020] The beneficial effect of the utility model is as follows: the utility model provides a special-shaped side-entry backlight module, by arranging a thermal conductive adhesive layer on the light bar, the first surface of the thermal conductive adhesive layer is connected to the light bar, and the second surface of the thermal conductive adhesive layer is connected to the side wall of the mounting groove, so that not only the light bar can be fixed in the mounting groove of the base plate, but also the heat generated by the light bar when working can be better conducted to the base plate, with better heat dissipation effect, and can avoid the jagged melting deformation or yellowing of the light guide plate, so that the special-shaped side-entry backlight module has better optical taste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 A schematic structural diagram of a special-shaped edge-type backlight module according to an embodiment;

[0023] Figure 2 A schematic diagram of the structure of a base plate and a light bar according to an embodiment;

[0024] Figure 3 A schematic structural diagram of a special-shaped edge-type backlight module according to an embodiment;

[0025] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 5 The figure is a schematic diagram of the structure of a bottom plate and a middle frame of an embodiment.

[0027] In the accompanying drawings, 10, special-shaped side-entry backlight module; 100, bottom plate; 101, mounting groove; 110, limiting groove; 120, built-in groove; 200, light strip; 210, lamp beads; 220, thermal conductive adhesive layer; 300, reflective film; 310, first adhesive layer; 320, second adhesive layer; 330, reflective side film; 400, light guide plate; 410, limiting boss; 420, limiting column; 500, middle frame; 510, limiting plate; 520, built-in protrusion; 600, optical film assembly; 610, limiting ear; 700, elastic limiting block; 710, limiting groove. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] In one embodiment, Figure 1 , Figure 2 and Figure 3 As shown, a special-shaped edge-entry backlight module 10 includes: a bottom plate 100, a light bar 200, a reflective film 300, a light guide plate 400 and a middle frame 500, wherein the bottom plate 100 is provided with a mounting groove 101, the light bar 200 is provided with a thermal conductive adhesive layer 220, the first surface of the thermal conductive adhesive layer 220 is connected to the first surface of the light bar 200, the second surface of the thermal conductive adhesive layer 220 is connected to the side wall of the first side of the mounting groove 101, and the second surface of the light bar 200 is connected to the side wall of the first side of the mounting groove 101. A plurality of lamp beads 210 are provided, the first surface of the reflective film 300 is connected to the bottom side wall of the mounting groove 101, the light guide plate 400 is provided in the mounting groove 101, the first surface of the light guide plate 400 is connected to the second surface of the reflective film 300, the first side of the light guide plate 400 is aligned with each of the lamp beads 210, the middle frame 500 is buckled on the bottom plate 100, and the middle frame 500 is movably abutted against the four edges of the light guide plate 400.

[0031] In the present embodiment, the special-shaped edge-entry backlight module 10 is a light source side-entry backlight module, and the light incident side of the light guide plate 400 is the side of the light guide plate 400 facing the lamp bead 210, that is, the light incident side of the light guide plate 400 is the first side of the light guide plate 400. A thermal conductive adhesive layer 220 is provided on the light bar 200, the first surface of the thermal conductive adhesive layer 220 is connected to the light bar 200, and the second surface of the thermal conductive adhesive layer 220 is connected to the side wall of the mounting groove 101. In this way, not only can the light bar 200 be fixed in the mounting groove 101 of the base plate 100, but also the heat generated by the light bar 200 during operation can be better conducted to the base plate 100, so as to have a better heat dissipation effect, and can avoid the light guide plate 400 from being jagged, melted, deformed or yellowed, so that the special-shaped edge-entry backlight module 10 has a better optical taste.

[0032] In this embodiment, the thermally conductive adhesive layer 220 is a heat-conducting adhesive layer formed by silicone thermally conductive adhesive, epoxy resin AB adhesive, polyurethane thermally conductive adhesive or thermally conductive silicone grease, which can effectively conduct the heat generated when the light strip 200 is working to the special-shaped side of the base plate 100. The special-shaped side of the base plate 100 has a large heat dissipation area and can effectively diffuse the heat outward.

[0033] In one embodiment, Figure 3 and Figure 4 As shown, a limiting boss 410 is provided on the first side of the light guide plate 400, and the limiting boss 410 is movably abutted against the second surface of the light bar 200. Specifically, a limiting boss 410 is provided on the light incident side of the light guide plate 400, and the number of the limiting bosses 410 is set to two, and the two limiting bosses 410 are spaced apart at both ends of the light incident side of the light guide plate 400. The limiting bosses 410 abut against the light bar 200, so that a distance can be set between the light guide plate 400 and the lamp beads 210, ensuring a safe distance between the sawtooth of the light guide plate 400 and the lamp beads 210, and further preventing the sawtooth of the light guide plate 400 from turning yellow or deforming due to the heat generated when the lamp beads 210 are working.

[0034] In one embodiment, Figure 3 As shown, an elastic stopper 700 is provided in the mounting groove 101, a first side of the elastic stopper 700 is connected to a side wall of a second side of the mounting groove 101, a stopper groove 710 is provided on the second side of the elastic stopper 700, and the second side of the light guide plate 400 is embedded in the stopper groove 710. Specifically, the first side of the light guide plate 400 abuts against the side wall of the first side of the mounting groove 101 through the stopper boss 410, and the second side of the light guide plate 400 abuts against the side wall of the second side of the mounting groove 101 through the elastic stopper 700, so that the light guide plate 400 can be installed in the mounting groove 101 by interference fit.

[0035] In one embodiment, Figure 3 and Figure 4As shown, a first adhesive layer 310 is provided on the reflective film 300, a first surface of the first adhesive layer 310 is connected to the first surface of the reflective film 300, a second surface of the first adhesive layer 310 is connected to the bottom side wall of the mounting groove 101, a second adhesive layer 320 is provided on the reflective film 300, a first surface of the second adhesive layer 320 is connected to the second surface of the reflective film 300, and a second surface of the first adhesive layer 310 is connected to the first surface of the light guide plate 400, so that the first surface of the reflective film 300 can be connected to the bottom side wall of the mounting groove 101 of the base plate 100 through the first adhesive layer 310, and the second surface of the reflective film 300 can be connected to the light guide plate 400 through the second adhesive layer 320, so that the light guide plate 400 can be stably installed on the base plate 100.

[0036] In one embodiment, Figure 3 and Figure 4 As shown, the light guide plate 400 is provided with a reflective side film 330. Specifically, the number of the reflective side films 330 is set to three, and the three reflective side films 330 are respectively distributed on the three side walls of the light guide plate 400 except the light incident side, which can avoid light loss at the side walls of the light guide plate 400, thereby playing a role in improving brightness and optical effects.

[0037] In one embodiment, Figure 5 As shown, a limiting plate 510 is provided on the middle frame 500, and a limiting groove 110 is provided on the side wall of the mounting groove 101, and the limiting plate 510 is arranged in the limiting groove 110. Specifically, the number of limiting plates 510 is set to be multiple, and the number of limiting grooves 110 is equal to the number of limiting plates 510. Each limiting plate 510 is evenly distributed on the middle frame 500, and each limiting groove 110 is evenly distributed on the side wall of the mounting groove 101. By fitting the limiting plates 510 in the limiting grooves 110, the movement of the middle frame 500 in the X-axis and Y-axis directions can be limited, and the middle frame 500 can be prevented from being deformed outward, and the light guide plate 400 can be well fixed.

[0038] In one embodiment, Figure 5As shown, the middle frame 500 is provided with a built-in protrusion 520, and the side wall of the mounting groove 101 is provided with a built-in groove 120, and the built-in protrusion 520 is embedded in the built-in groove 120. Specifically, there are a plurality of built-in protrusions 520, each of which is evenly distributed on the outer surface of the middle frame 500, the number of built-in grooves 120 is equal to the number of built-in protrusions 520, and each of which is evenly distributed on the side wall of the mounting groove 101. Each built-in protrusion 520 is embedded in a built-in groove 120, which can further limit the movement of the middle frame 500 in the Z-axis direction, and can keep the position between the middle frame 500 and the side wall of the mounting groove 101 relatively fixed, so that the middle frame 500 can be more stably fixed on the bottom plate 100.

[0039] In one embodiment, Figure 3 and Figure 4 As shown, the special-shaped edge-entry backlight module 10 further includes: an optical film assembly 600, a limiting post 420 is arranged on the second surface of the light guide plate 400, the optical film assembly 600 is arranged on the second surface of the light guide plate 400, and a limiting clamp 610 is provided on the optical film of the optical film assembly 600, and the limiting post 420 is engaged in the limiting clamp 610. Specifically, the optical film of the optical film assembly 600 is a film that can enhance or improve the optical effect of the light guide plate 400. For example, the optical film is a diffuser film that can diffuse and propagate the light scattering conducted from the light guide plate 400. By expanding the diffusion angle, the problem of uneven brightness can be overcome, and uniform light emission from the surface light source can be achieved. For another example, the optical film 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. The optical films of the optical film assembly 600 are sequentially stacked on the second surface of the light guide plate 400, which can compositely enhance the optical effect of the light guide plate 400. At the same time, by providing a limit clamp 610 on each optical film, the limit column 420 on the light guide plate 400 is engaged in the limit clamp 610, so that each optical film of the optical film assembly 600 can be limited and fixed, and the displacement of the optical film can be avoided.

[0040] The utility model also provides a display device, comprising the special-shaped edge-entry 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 special-shaped edge-entry 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 special-shaped edge-entry backlight module 10, and the outer frame is arranged around the outside of the special-shaped edge-entry backlight module 10. It should be understood that the display device may also include other components, which are not described here in a cumbersome manner.

[0041] Compared with the prior art, the utility model has at least the following advantages:

[0042] The utility model provides a special-shaped side-entry backlight module, in which a heat-conducting adhesive layer is arranged on the light bar, the first surface of the heat-conducting adhesive layer is connected to the light bar, and the second surface of the heat-conducting adhesive layer is connected to the side wall of the mounting groove. In this way, not only can the light bar be fixed in the mounting groove of the base plate, but also the heat generated by the light bar when working can be better conducted to the base plate, which has a good heat dissipation effect and can avoid the situation that the light guide plate appears jagged, melted, deformed or yellowed, so that the special-shaped side-entry backlight module has a good optical taste.

[0043] 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 special-shaped side-entry backlight module, characterized in that: include: A bottom plate, wherein a mounting groove is formed on the bottom plate; A light bar, wherein a heat-conducting adhesive layer is disposed on the light bar, a first surface of the heat-conducting adhesive layer is connected to a first surface of the light bar, a second surface of the heat-conducting adhesive layer is connected to a side wall of a first side of the mounting groove, and a plurality of lamp beads are disposed on the second surface of the light bar; A reflective film, wherein a first surface of the reflective film is connected to a bottom side wall of the mounting groove; A light guide plate, the light guide plate is arranged in the mounting groove, a first surface of the light guide plate is connected to a second surface of the reflective film, and a first side of the light guide plate is aligned with each of the lamp beads; 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 special-shaped edge-lit backlight module according to claim 1, characterized in that: A limiting boss is arranged on the first side of the light guide plate, and the limiting boss is movably abutted against the second surface of the light bar.

3. The special-shaped edge-lit backlight module according to claim 2, characterized in that: An elastic limit block is arranged in the installation groove, a first side of the elastic limit block is connected to the side wall of the second side of the installation groove, a limit groove is arranged on the second side of the elastic limit block, and the second side of the light guide plate is embedded in the limit groove.

4. The special-shaped edge-lit backlight module according to claim 1, characterized in that: A first adhesive layer is disposed on the reflective film, a first surface of the first adhesive layer is connected to the first surface of the reflective film, and a second surface of the first adhesive layer is connected to the bottom side wall of the mounting groove.

5. The special-shaped edge-lit backlight module according to claim 4, characterized in that: A second adhesive layer is disposed on the reflective film, a first surface of the second adhesive layer is connected to a second surface of the reflective film, and a second surface of the first adhesive layer is connected to a first surface of the light guide plate.

6. The special-shaped edge-lit backlight module according to claim 5, characterized in that: The light guide plate is provided with a reflective side film.

7. The special-shaped edge-lit backlight module according to claim 1, characterized in that: A limiting plate is arranged on the middle frame, a limiting groove is provided on the side wall of the mounting groove, and the limiting plate is arranged in the limiting groove.

8. The special-shaped edge-lit backlight module according to claim 7, characterized in that: The middle frame is provided with a built-in protrusion, the side wall of the mounting groove is provided with a built-in groove, and the built-in protrusion is embedded in the built-in groove.

9. The special-shaped edge-lit backlight module according to claim 1, characterized in that: Also includes: The optical film assembly comprises a limiting post on the second surface of the light guide plate, the optical film assembly is arranged on the second surface of the light guide plate, the optical film of the optical film assembly is provided with a limiting ear, and the limiting post is engaged in the limiting ear.

10. A display device, characterized in that: A special-shaped edge-entry backlight module comprising any one of claims 1-9.

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