LED vehicle-mounted backlight plate structure

Abstract

The LED vehicle-mounted backlight plate structure comprises a frame body, a back plate, a foam strip and an optical film material, the frame body comprises a frame and a bearing frame, the bearing frame is vertically connected to the inner wall of the frame and divides the frame into an inner side and an outer side with the bearing frame as the center, and the back plate is fixedly connected to the outer side of the frame. Connecting bosses are arranged at the connecting positions of the inner side of the frame and the bearing frame, the foam strips are arranged in the circumferential direction of the connecting bosses, the bottom edges of the foam strips are fixedly connected to the outer wall faces of the connecting bosses respectively, and a containing cavity allowing an optical film material to be placed in is defined between the inner side walls of the connecting bosses and the bearing frame. And an expansion gap for expansion and shrinkage of the optical film material is reserved between the foam strip and the optical film material. According to the vehicle-mounted display screen, the phenomenon that the optical film material is wrinkled or warped when expanding at high temperature can be avoided, the problem that the optical film material is wrinkled under the temperature change is solved, the service life of the vehicle-mounted display screen can be prolonged, and the light-emitting effect of the vehicle-mounted display screen is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted backlight panels, and more specifically to a LED vehicle-mounted backlight panel structure. Background Art

[0002] A general vehicle display screen is composed of a display screen and a backlight panel structure. In a traditional vehicle backlight panel structure, the optical film material inside the backlight panel structure is usually glued together with the foam. There is no expansion gap between the optical film material and the foam for the optical film material to expand. During the LED light-emitting process, the temperature will rise, and the heat transferred to the back panel cannot be dissipated in time and will be directly transferred to the optical film. The optical film will be damaged by wrinkles or warping due to the lack of reserved space. In addition, the larger the bonding area between the foam and the optical film material, the higher the probability of wrinkling of the heated optical film, which will affect the lighting effect of the vehicle display screen.

[0003] For example, utility model patent publication number CN208954526U discloses a backlight module, including a backplane, a light guide plate placed inside the backplane, an optical film group placed above the light guide plate, and a sheet metal middle frame placed above the backplane, with a circle of foam arranged in the gap between the sheet metal middle frame and the optical film group. This patent arranges a circle of foam in the gap between the sheet metal middle frame and the optical film, and there is no reserved expansion gap between the foam and the optical film. The heat generated by the light cannot be dissipated in time, and the heat will be directly transferred to the optical film. The optical film will be wrinkled and damaged due to the lack of expansion space, which seriously affects the light-emitting effect of the vehicle display. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned defects in the prior art and provide a kind of LED vehicle backlight panel structure which can avoid the phenomenon of wrinkling or warping when the optical film material expands at high temperature, solves the problem of wrinkling of the optical film material under temperature changes, can extend the service life of the vehicle display screen, and ensures the luminous effect of the vehicle display screen.

[0005] To achieve the above-mentioned purpose, the utility model provides an LED vehicle-mounted backlight panel structure, including a frame, a back panel, a foam strip and an optical film material, the frame including a frame and a supporting frame, the supporting frame is vertically connected to the inner wall of the frame and divides the frame into inner and outer sides with the supporting frame as the center, the back panel is fixedly connected to the outer side of the frame, and connecting bosses are provided at the connecting parts between the inner side of the frame and the supporting frame, the foam strips are respectively arranged around the circumference of the connecting bosses, and the bottom edges of the foam strips are respectively fixedly connected to the outer wall surfaces of the connecting bosses, and a accommodating cavity for placing the optical film material is formed between the inner side wall of the connecting boss and the supporting frame, and an expansion gap is left between the foam strip and the optical film material for the optical film material to expand and contract.

[0006] Preferably, the bottom edges of the foam strips are fixedly connected to the outer wall surfaces of the connecting bosses via adhesive structures.

[0007] Preferably, the bonding structure is configured as a double-sided tape.

[0008] Preferably, it also includes a light guide plate, an LED board and a diffusion plate, wherein the light guide plate is located in the accommodating cavity and connected to one side of the supporting frame, the diffusion plate is connected to one side of the optical film material, and the LED board is connected between the diffusion plate and the light guide plate.

[0009] Preferably, it further comprises a transparent PET film, wherein the transparent PET film is fixedly connected to the top surface of the foam strip, and the transparent PET film is configured as a weakly adhesive film.

[0010] Preferably, the frame is configured as a plastic frame.

[0011] Preferably, the cross-sectional shape of the frame is set to be an I-shape.

[0012] Preferably, a groove for inserting the back panel is formed on the outer side of the inner wall of the frame, and the outer walls of the bent edges around the back panel are respectively fixedly connected to the inner side walls of the groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model has a simple structure and a reasonable design. The foam strip is fixedly connected to the connecting boss of the frame so that an expansion gap is left between the foam strip and the optical film material for the expansion and contraction of the optical film material. Compared with the traditional foam strip and optical film material bonded to each other, the utility model can avoid the phenomenon of wrinkling or arching of the optical film material when expanding at high temperature, solves the problem of wrinkling of the optical film material under temperature changes, can extend the service life of the vehicle display screen, and ensures the luminous effect of the vehicle display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the side cross-section structure of an LED vehicle-mounted backlight panel structure provided by an embodiment of the utility model;

[0017] Figure 2It is a schematic diagram of a side section structure of an LED vehicle-mounted backlight panel structure provided by an embodiment of the utility model;

[0018] Figure 3 This is an enlarged schematic diagram of the side section structure of an LED vehicle backlight panel structure provided by the embodiment of the utility model. Figure 1 ;

[0019] Figure 4 This is an enlarged schematic diagram of the side section structure of an LED vehicle backlight panel structure provided by the embodiment of the utility model. Figure 2 ;

[0020] Figure 5 It is a schematic diagram of the front cross-section structure of an LED vehicle-mounted backlight panel structure provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Please refer to Figures 1 to 5 An embodiment of the utility model provides an LED vehicle-mounted backlight panel structure, including a frame 1, a back panel 2, a foam strip 3, an optical film material 4, an adhesive structure 5, a light guide plate 6, an LED panel 7, a diffusion plate 8 and a transparent PET film 9. The various components of this embodiment are described in detail below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 3 As shown, the frame body 1 may include a frame 11 and a supporting frame 12. The supporting frame 12 is vertically connected to the inner wall of the frame 11 and divides the frame 11 into inner and outer sides with the supporting frame 12 as the center. The back panel 2 is fixedly connected to the outer side of the frame 11. A connecting boss 13 is provided at the connecting portion between the inner side of the frame 11 and the supporting frame 12.

[0024] Specifically, a groove 14 for the back plate 2 to be placed in may be formed on the outer side of the inner wall of the frame 11 , and the outer walls of the bent edges 21 around the back plate 2 are fixedly connected to the inner side walls of the groove 14 .

[0025] Preferably, the frame 1 can be set as a plastic frame, and the cross-sectional shape of the frame 1 can be set as an I-shape.

[0026] like Figure 4As shown, the foam strips 3 can be arranged around the circumference of the connecting bosses 13, and the bottom edges of the foam strips 3 are fixedly connected to the outer wall surfaces of the connecting bosses 13, and a receiving cavity 10 for the optical film material 4 to be placed is formed between the inner wall of the connecting bosses 13 and the supporting frame 12, and an expansion gap is left between the foam strips 3 and the optical film material 4 for the optical film material 4 to expand and contract.

[0027] Among them, in order to prevent the optical film material 4 from wrinkling due to the lack of reserved space after expansion due to temperature changes, thereby affecting the luminous effect of the vehicle display screen, the expansion gap reserved in this embodiment can allow the optical film material 4 to have space for expansion and contraction, thereby avoiding wrinkles and effectively extending the service life of the vehicle backlight panel.

[0028] In this embodiment, the bottom edge of the foam strip 3 can be fixedly connected to the outer wall surface of the connecting boss 13 through the adhesive structure 5.

[0029] Specifically, the bonding structure 5 can be set as a double-sided adhesive. This embodiment preferably uses TESA4972 double-sided adhesive, the adhesive of which is modified acrylic adhesive, with an ultra-thin thickness of only 0.048MM, strong bonding force, good solvent resistance, aging resistance, softening resistance, moisture resistance, and excellent processing performance and temperature resistance.

[0030] The foam is a material made of foamed plastic particles, and has a series of advantages such as elasticity, light weight, rapid pressure-sensitive fixation, and ultra-thin volume. This embodiment uses PSR-04 polyurethane foam, and the elasticity of the foam strip 3 can well play a buffering role between the external display screen and the carrier frame 12, and will not cause the problem of uneven stress on the external display screen.

[0031] In this embodiment, it can also include a light guide plate 6, an LED board 7 and a diffusion plate 8. The light guide plate 6 is located in the accommodating cavity 10 and is connected to one side of the supporting frame 12. The diffusion plate 8 is connected to one side of the optical film material 4. The LED board 7 is connected between the diffusion plate 8 and the light guide plate 6.

[0032] Among them, a number of LED lamp beads are evenly distributed on the LED board 7, and the LED board 7 adjusts the display brightness of the LED lamp beads through the FPC board control circuit. The main function of the diffusion plate 8 is to refract, reflect and scatter the light emitted from the light emitting surface of the light guide plate 6 multiple times, so that the backlight is more uniform, so as to improve the utilization rate of the light source.

[0033] Furthermore, a transparent PET film 9 may be further included. The transparent PET film 9 is fixedly connected to the top surface of the foam strip 3 , and the transparent PET film 9 is configured as a weakly adhesive film.

[0034] To sum up, the utility model fixes the foam strip and the connecting boss of the frame to leave an expansion gap between the foam strip and the optical film material for the expansion and contraction of the optical film material. Compared with the traditional foam strip and optical film material bonded to each other, the utility model can avoid the phenomenon of wrinkling or arching of the optical film material when expanding at high temperature, solves the problem of wrinkling of the optical film material under temperature changes, can extend the service life of the vehicle display screen, and ensure the luminous effect of the vehicle display screen.

[0035] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An LED vehicle-mounted backlight panel structure, characterized in that: The optical film comprises a frame (1), a back plate (2), a foam strip (3) and an optical film material (4); the frame (1) comprises a frame (11) and a carrying frame (12); the carrying frame (12) is vertically connected to the inner wall of the frame (11) and divides the frame (11) into inner and outer sides with the carrying frame (12) as the center; the back plate (2) is fixedly connected to the outer side of the frame (11); and the inner side of the frame (11) and the carrying frame (12) are both provided at the connection part. A connecting boss (13) is provided, and the foam strips (3) are respectively arranged around the circumference of the connecting boss (13), and the bottom edges of the foam strips (3) are respectively fixedly connected to the outer wall surface of the connecting boss (13), and a receiving cavity (10) for placing the optical film material (4) is formed between the inner side wall of the connecting boss (13) and the supporting frame (12), and an expansion gap is left between the foam strips (3) and the optical film material (4) for the optical film material (4) to expand and contract.

2. The LED vehicle-mounted backlight structure according to claim 1, characterized in that: The bottom edges of the foam strips (3) are fixedly connected to the outer wall surface of the connecting boss (13) via adhesive structures (5).

3. The LED vehicle-mounted backlight structure according to claim 2, characterized in that: The bonding structure (5) is configured as a double-sided adhesive tape.

4. The LED vehicle-mounted backlight structure according to claim 1, characterized in that: It also includes a light guide plate (6), an LED board (7) and a diffusion plate (8), wherein the light guide plate (6) is located in the accommodating cavity (10) and connected to a side surface of the supporting frame (12), the diffusion plate (8) is connected to a side surface of the optical film material (4), and the LED board (7) is connected between the diffusion plate (8) and the light guide plate (6).

5. The LED vehicle-mounted backlight structure according to claim 1, characterized in that: It also comprises a transparent PET film (9), wherein the transparent PET film (9) is fixedly connected to the top surface of the foam strip (3), and the transparent PET film (9) is configured as a weakly adhesive film.

6. The LED vehicle-mounted backlight structure according to claim 1, characterized in that: The frame (1) is configured as a plastic frame.

7. The LED vehicle-mounted backlight structure according to claim 1, characterized in that: The cross-sectional shape of the frame (1) is set to be an I-shape.

8. The LED vehicle-mounted backlight structure according to claim 1, characterized in that: A groove (14) for the back plate (2) to be placed is formed on the outer side of the inner wall of the frame (11), and the outer walls of the bent edges (21) around the back plate (2) are respectively fixedly connected to the inner side walls of the groove (14).

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