Round narrow-edge backlight module

Abstract

The utility model discloses a round narrow-edge backlight module which comprises a backlight shell, and a containing cavity is formed in the inner wall of the backlight shell. The backlight FPC is mounted in the backlight shell through the accommodating cavity; the cover plate assembly is embedded into the outer opening of the accommodating cavity and is buckled at the end part of the backlight shell; the diffusion plate is located between the backlight FPC and the cover plate assembly and used for conducting correction diffusion on light sources of LED lamp beads on the backlight FPC; wherein one side wall of the backlight shell is provided with a heat dissipation structure used for assembling the backlight FPC on the heat dissipation structure, and meanwhile, as the LED lamp beads are distributed at the bottom of the backlight shell in a direct downward mode, the LED lamp beads can be arranged at any position without being limited by the appearance of the backlight shell. According to the circular narrow-edge backlight module provided by the utility model, the LED lamp beads are placed at the bottom of the backlight shell, so that the edge of the backlight shell can be made to be the same as that of the inner end of the cover plate compared with a traditional mode that the LED lamp beads and the backlight FPC are placed on the side wall.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight modules, and particularly relates to a circular narrow-edge backlight module. Background Art

[0002] The backlight module is one of the components of the liquid crystal display panel. Its function is to supply sufficient brightness and a uniformly distributed light source so that it can display images normally. The so-called backlight is a light source located behind the liquid crystal display, and its lighting effect will directly affect the visual effect of the liquid crystal display module (LCM).

[0003] As Figure 10 shown, due to the too large size of the automotive rotary button screen, the design is not beautiful enough. This is mainly because light is emitted from one side of the backlight, and a relatively large number of LEDs 1-1 need to be stacked and arranged to achieve brightness improvement. As Figure 11 shown, for the structure after adding LEDs 1-1, because there are more LEDs 1-1, the outer shapes of the backlight 1-2 and the cover plate 1-3 need to be enlarged, resulting in an inability to make a pure circular backlight design solution. The relatively large border makes the design very unbeautiful. Therefore, how to improve the brightness while meeting the requirements of a narrow-edge backlight is the technical problem to be solved in this application. For this reason, a circular narrow-edge backlight module is proposed. Content of the Utility Model

[0004] Based on this, in view of the above technical problems, it is necessary to provide a circular narrow-edge backlight module. Adopting a bottom-backlight solution and placing the LEDs at the bottom, the backlight edge can be made the same as the black width of the TFT, achieving the minimization of the border.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A circular narrow-edge backlight module, comprising:

[0007] A backlight housing, in which an accommodation cavity is formed on the inner wall;

[0008] A backlight FPC, which is installed inside the backlight housing through the accommodation cavity;

[0009] A cover plate assembly, which is embedded at the outer opening of the accommodation cavity and buckled to the end of the backlight housing;

[0010] A diffusion plate, which is located between the backlight FPC and the cover plate assembly and is used to correct and diffuse the light source of the LED lamp beads on the backlight FPC;

[0011] Wherein, one side wall of the backlight housing has a heat dissipation structure for the assembly of the backlight FPC thereon.

[0012] Further, the heat dissipation structure includes a limiting step formed on the bottom wall of the backlight housing;

[0013] The limiting step is formed around the periphery of the backlight FPC and encloses to form an installation cavity, and a heat dissipation part is arranged in the installation cavity;

[0014] Wherein, the backlight FPC is installed in the installation cavity and is in close contact with the heat dissipation part.

[0015] Further, a double-sided adhesive is pasted at the edge of one side of the backlight FPC, and an embedding groove is formed at the position corresponding to the double-sided adhesive on the heat dissipation part;

[0016] Wherein, both sides of the double-sided adhesive are respectively pasted with the corresponding backlight FPC and the embedding groove.

[0017] Further, a heat dissipation cavity corresponding to the installation cavity is formed on one side of the backlight housing.

[0018] Further, the heat dissipation part extends outwards with a plurality of annular heat dissipation ridges;

[0019] The plurality of annular heat dissipation ridges are all coaxially arranged with the center point of the heat dissipation part, and the inner diameters of the plurality of heat dissipation ridges increase sequentially from inside to outside.

[0020] Further, an independent heat dissipation channel is formed between adjacent heat dissipation ridges.

[0021] Further, a communication groove is formed on the annular heat dissipation ridge, and under the action of the communication groove, the plurality of independent heat dissipation channels can be fused with each other to jointly form a heat dissipation space.

[0022] Further, a graphene heat dissipation sheet is laid in the heat dissipation space to absorb and dissipate the heat in the heat dissipation space.

[0023] A circular narrow-edge backlight module includes a backlight housing, and a receiving cavity is formed in the backlight housing. It is characterized in that it further includes:

[0024] A backlight FPC, which is laid in the backlight housing through the receiving cavity;

[0025] The backlight FPC extends along the inner wall direction of the receiving cavity to form an annular backlight FPC;

[0026] Wherein, LED lamp beads are arranged on the backlight FPC, and the plurality of LED lamp beads are evenly distributed on the backlight FPC to achieve brightness uniformity.

[0027] Further, a cover plate assembly is buckled at the outer end of the receiving cavity on one side of the backlight housing, and the outer shape of the cover plate assembly corresponds to the backlight FPC and the LED lamp beads thereon.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] The circular narrow-edge backlight module provided by the utility model adopts a bottom backlight scheme, and places the LED lamp beads at the bottom of the backlight housing. Therefore, compared with the traditional method of placing the LED lamp beads and the backlight FPC on the side wall, the edge of the backlight housing can be made the same as the inner end of the cover plate to achieve the minimization of the frame, avoiding the problem of unaesthetic caused by the need to widen the backlight housing;

[0030] At the same time, since the LED lamp beads are distributed directly below at the bottom of the backlight housing, they are not restricted by the shape of the backlight housing and can be arranged at any position to improve the brightness and its uniformity;

[0031] By adopting the setting of the heat dissipation structure, when the LED lamp beads and the backlight FPC are working, the heat can be transferred to a plurality of annular heat dissipation ridges for heat dissipation with an increased area, promoting the dissipation of heat. At the same time, with the paste of the graphene heat dissipation sheet, it can further promote the transfer of heat from the inside to the outside of the backlight housing, further improving the heat dissipation effect of the backlight module to ensure the stability of the LED lamp beads and the backlight FPC when they are working.

[0032] By making the backlight FPC into a ring shape through side-injection and laying it at the edge of the backlight housing, while increasing the LED lamp beads to improve the brightness, the plurality of LED lamp beads can be evenly distributed along the annular backlight FPC, avoiding the situation that the frame of the backlight housing increases due to concentrated accumulation and the overall unaesthetic appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of the circular narrow-edge backlight module provided by the utility model;

[0034] Figure 2 It is a schematic internal structure diagram of the circular narrow-edge backlight module provided by the utility model;

[0035] Figure 3 It is a schematic cross-sectional structural diagram of the circular narrow-edge backlight module provided by the utility model;

[0036] Figure 4 It is of the circular narrow-edge backlight module provided by the utility model Figure 3 The enlarged structural diagram at A;

[0037] Figure 5 It is a schematic internal structure diagram of the internal heat dissipation cavity in Embodiment 2 of the circular narrow-edge backlight module provided by the utility model;

[0038] Figure 6 It is a schematic structural diagram of the internal communication groove in Embodiment 2 of the circular narrow-edge backlight module provided by the utility model;

[0039] Figure 7 Schematic diagram of the internal heat dissipation space structure of Embodiment 2 of the circular narrow-edge backlight module provided by the present utility model;

[0040] Figure 8 Schematic diagram of the graphene heat sink structure inside Embodiment 2 of the circular narrow-edge backlight module provided by the present utility model;

[0041] Figure 9 Schematic diagram of the structure of Embodiment 3 of the circular narrow-edge backlight module provided by the present utility model;

[0042] Figure 10 Schematic diagram of one of the prior arts provided by the present utility model;

[0043] Figure 11 Schematic diagram of another prior art provided by the present utility model.

[0044] The markings in the figure are explained as follows:

[0045] Backlight housing 1, accommodation cavity 11;

[0046] Backlight FPC 2, LED lamp beads 21, double-sided adhesive 22;

[0047] Cover plate assembly 3;

[0048] Diffusion plate 4;

[0049] Heat dissipation structure 5, limiting step 51, installation cavity 52, embedding groove 53, heat dissipation cavity 54, heat dissipation part 55;

[0050] Annular heat dissipation rib 550, independent heat dissipation channel 551, communication groove 552, heat dissipation space 553, graphene heat sink 554. Specific implementation manners

[0051] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0052] As described in the background art, as Figure 10 shown, since the application in the automotive rotary button has an overly large screen and the design is not aesthetically pleasing, because it mainly emits light from the backlight side, a relatively large number of LEDs 1-1 need to be arranged to achieve brightness improvement, as Figure 11As shown, it is the structure after adding LED1-1. Since there are more LED1-1s, it is necessary to increase the outer shapes of the backlight 1-2 and the cover plate 1-3, resulting in an inability to adopt a pure circular backlight design solution. The relatively large border makes the design very unattractive.

[0053] To solve this technical problem, the present utility model provides a circular narrow-edge backlight module, which is applied to the backlight module.

[0054] Specifically, please refer to Figures 1 - 8 , the circular narrow-edge backlight module specifically includes:

[0055] A backlight housing 1, in which a receiving cavity 11 is formed on the inner wall of the backlight housing 1;

[0056] A backlight FPC 2, which is installed inside the backlight housing 1 through the receiving cavity 11;

[0057] A cover plate assembly 3, which is embedded at the outer opening of the receiving cavity 11 and fastened to the end of the backlight housing 1;

[0058] A diffusion plate 4, which is located between the backlight FPC 2 and the cover plate assembly 3 and is used to correct and diffuse the light source of the LED lamp beads 21 on the backlight FPC 2;

[0059] Wherein, one side wall of the backlight housing 1 has a heat dissipation structure 5 for the assembly of the backlight FPC 2 thereon.

[0060] For the circular narrow-edge backlight module provided by the present utility model, a bottom backlight solution is adopted, and the LED lamp beads 21 are placed at the bottom of the backlight housing 1. Therefore, compared with the traditional method of placing the LED lamp beads 21 and the backlight FPC 2 on the side wall, the edge of the backlight housing 1 can be made the same as the inner end of the cover plate assembly 3 to minimize the border and avoid the problem of ugliness caused by the need to widen the backlight housing;

[0061] At the same time, since the LED lamp beads 21 are distributed directly below at the bottom of the backlight housing 1, they are not restricted by the outer shape of the backlight housing 1 and can be arranged at any position to improve the brightness and its uniformity.

[0062] The present utility model also provides a circular narrow-edge backlight module, which is applied to the backlight module;

[0063] Please refer to Figure 9 As shown, the circular narrow-edge backlight module includes a backlight housing 1, in which a receiving cavity 11 is formed, and further includes:

[0064] A backlight FPC 2, which is laid inside the backlight housing 1 through the receiving cavity 11;

[0065] The backlight FPC2 extends along the inner wall direction of the accommodation cavity 11 to form an annular backlight FPC;

[0066] Wherein, LED beads 21 are provided on the backlight FPC2, and a plurality of the LED beads 21 are evenly distributed on the backlight FPC2 to achieve brightness uniformity;

[0067] The circular narrow-edge backlight module provided by the present utility model makes the backlight FPC2 annular by side entry and lays it at the edge of the backlight housing 1. While increasing the LED beads 21 to enhance brightness, a plurality of LED beads 21 are evenly distributed along the annular backlight FPC2, avoiding the situation that the frame of the backlight housing 1 increases due to concentrated accumulation and the overall appearance is not beautiful.

[0068] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

[0069] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments can be combined with each other.

[0070] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0071] Please refer to Figures 1 - 8 As shown, a circular narrow-edge backlight module, a backlight housing 1, in which an accommodation cavity 11 is formed on the inner wall of the backlight housing 1; a backlight FPC2, which is installed inside the backlight housing 1 through the accommodation cavity 11; a cover plate assembly 3, which is embedded at the outer opening of the accommodation cavity 11 and buckled at the end of the backlight housing 1;

[0072] A diffusion plate 4, which is located between the backlight FPC2 and the cover plate assembly 3, and is used to correct and diffuse the light source of the LED beads 21 on the backlight FPC2;

[0073] Wherein, one side wall of the backlight housing 1 has a heat dissipation structure 5 for the assembly of the backlight FPC2 thereon;

[0074] As Figure 4 shown, the heat dissipation structure 5 includes a limiting step 51 formed on the bottom wall of the backlight housing 1. The limiting step 51 is opened around the periphery of the backlight FPC2 and encloses to form an installation cavity 52. The backlight FPC2 is installed inside the installation cavity 52, and its stable embedded assembly inside the backlight housing 1 is ensured by the action of the limiting step 51;

[0075] The installation cavity 52 is provided with a heat dissipation part 55, and the heat dissipation part 55 is integrally formed with the backlight housing 1. Among them, the backlight FPC 2 is installed in the installation cavity 52 and is in close contact with the heat dissipation part 55. Through the close-fitting assembly design, when the backlight FPC 2 and the LED beads 21 thereon are working, the heat can be transferred to the outside in a timely and sufficient manner to cooperate with the effective heat dissipation of the heat dissipation structure 5;

[0076] A double-sided adhesive 22 is pasted at the edge of one side of the backlight FPC 2, and an embedding groove 53 is formed at the position corresponding to the double-sided adhesive 22 on the heat dissipation part 55;

[0077] Among them, both sides of the double-sided adhesive 22 are respectively pasted to the corresponding backlight FPC 2 and embedding groove 53;

[0078] During the actual pasting process, first paste one side of the double-sided adhesive 22 on the back of the backlight FPC 2, and then send the backlight FPC 2 into the installation cavity 52 and press it. Through pressing, the double-sided adhesive 22 can be stably pasted into the embedding groove 53 to form a firm paste;

[0079] With the above structural design, the LED beads 21 and the backlight FPC 2 thereon are distributed at the bottom of the backlight housing 1 to form a direct-lit arrangement (as Figure 10 shown, in some traditional backlight modules, the backlight FPC and LED beads are arranged in a side-entry manner, so that the overall size width will be increased around the diffusion plate for the side-entry placement of the backlight FPC). Therefore, the width dimension of the backlight housing 1 will not be increased additionally. Compared with the traditional backlight module, the edge width of the backlight housing 1 is further reduced. At the same time, since the backlight FPC 2 is a whole-surface design, the LED beads 21 thereon can be arranged at any position, so as to ensure the overall brightness and uniformity of the light source;

[0080] Compared with Figure 11 it, the problem of overall unsightliness and disharmony caused by widening the structure at a certain part of the backlight housing 1 on the basis of the side-entry arrangement is avoided.

[0081] The circular narrow-edge backlight module provided in Embodiment 1 is further optimized. Specifically, as Figure 4 shown, a heat dissipation cavity 54 corresponding to the installation cavity 52 is opened on one side of the backlight housing 1;

[0082] The heat dissipation part 55 extends outwards with a plurality of annular heat dissipation ridges 550;

[0083] A plurality of the annular heat dissipation ridges 550 are all coaxially arranged with the center point of the heat dissipation part 55, and the inner diameters of the plurality of heat dissipation ridges 550 increase in sequence from the inside to the outside;

[0084] Through the cooperation of multiple annular heat dissipation ridges 550, the heat absorbed by the heat dissipation part 55 can be transferred on the annular heat dissipation ridges 550. By setting the multiple annular heat dissipation ridges 550, the effective heat dissipation area of the whole heat dissipation part 55 is increased;

[0085] An independent heat dissipation channel 551 is formed between adjacent heat dissipation ridges 550;

[0086] The annular heat dissipation ridge 550 is provided with a communication groove 552. Under the action of the communication groove 552, multiple independent heat dissipation channels 551 can be fused with each other to jointly form a heat dissipation space 553. Through the structural design of the communication groove 552, the multiple independent heat dissipation channels 551 are communicated with each other, thus ensuring the uniformity of heat dissipation;

[0087] As a further optimization of this embodiment: A graphene heat dissipation sheet 554 is laid in the heat dissipation space 553 to absorb and dissipate the heat in the heat dissipation space 553. With the setting of the graphene heat dissipation sheet 554, on the basis of increasing the heat dissipation area to improve the heat dissipation effect as described above, the effect of the graphene heat dissipation sheet 554 can be combined to perform secondary heat transfer, absorption and dissipation, further improving the heat dissipation effect of the backlight module and ensuring the stable operation of the direct-lit backlight FPC2 and the LED beads 21 thereon.

[0088] The circular narrow-edge backlight module of the third embodiment of the present invention, as Figure 9 shown, a receiving cavity 11 is formed in the backlight housing 1, and further includes: a backlight FPC2, which is laid in the backlight housing 1 through the receiving cavity 11; the backlight FPC2 extends along the inner wall direction of the receiving cavity 11 to form an annular backlight FPC2;

[0089] Wherein, LED beads 21 are provided on the backlight FPC2, and the multiple LED beads 21 are evenly distributed on the backlight FPC2 to achieve brightness uniformity;

[0090] A cover plate assembly 3 is buckled at the outer end of the receiving cavity 11 on one side of the backlight housing 1, and the outer shape of the cover plate assembly 3 is correspondingly arranged with the backlight FPC2 and the LED beads 21 thereon;

[0091] Based on the prior art in this embodiment Figure 10 , the backlight FPC2 is made into an annular shape, and it is laid at the inner edge of the backlight housing 1 through the annular backlight FPC2. Multiple LED beads 21 can also be distributed on the backlight FPC2. The light source brightness and uniformity are improved through the annularly distributed multiple LED beads 21. At the same time, as Figure 11 shown, it is not necessary to additionally increase the width of the backlight housing on one side, ensuring the uniformity and narrow edge of the overall size of the backlight module.

[0092] Compared with the backlight modules in Embodiment 2 and Embodiment 1, the width of this embodiment is not narrower than theirs, but the overall thickness of the module is better than that of the modules in Embodiment 1 and Embodiment 2. For specific actual usage scenarios, an adaptive selection is made according to the actual needs of users.

[0093] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0094] Obviously, the above-described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. The drawings show preferred embodiments of the present utility model, but do not limit the patent scope of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present utility model in other related technical fields shall be similarly within the scope of the patent protection of the present utility model.

Claims

1. A circular narrow-edge backlight module, characterized in that, It includes: A backlight housing (1), in which a receiving cavity (11) is formed on the inner wall of the backlight housing (1); A backlight FPC (2), which is installed inside the backlight housing (1) through the receiving cavity (11); A cover plate assembly (3), which is embedded at the outer opening of the receiving cavity (11) and buckled to the end of the backlight housing (1); A diffusion plate (4), which is located between the backlight FPC (2) and the cover plate assembly (3) and is used to correct and diffuse the light source of the LED beads (21) on the backlight FPC (2); Wherein, one side wall of the backlight housing (1) has a heat dissipation structure (5) for the assembly of the backlight FPC (2) thereon.

2. The circular narrow-edge backlight module according to claim 1, wherein, The heat dissipation structure (5) includes a limiting step (51) formed on the bottom wall of the backlight housing (1); The limiting step (51) is opened around the periphery of the backlight FPC (2) and encloses to form an installation cavity (52), and a heat dissipation part (55) is provided in the installation cavity (52); Wherein, the backlight FPC (2) is installed in the installation cavity (52) and is in close contact with the heat dissipation part (55).

3. The circular narrow-edge backlight module according to claim 2, wherein A double-sided adhesive (22) is pasted at the edge of one side surface of the backlight FPC (2), and an embedding groove (53) is formed at the position corresponding to the double-sided adhesive (22) on the heat dissipation part (55); Wherein, both sides of the double-sided adhesive (22) are respectively pasted to the corresponding backlight FPC (2) and the embedding groove (53).

4. The circular narrow-edge backlight module according to claim 2, wherein One side of the backlight housing (1) is provided with a heat dissipation cavity (54) corresponding to the installation cavity (52).

5. The circular narrow-edge backlight module according to claim 4, wherein The heat dissipation part (55) extends outward with a plurality of annular heat dissipation ridges (550); The plurality of annular heat dissipation ridges (550) are all coaxially arranged with the center point of the heat dissipation part (55), and the inner diameters of the plurality of heat dissipation ridges (550) increase sequentially from inside to outside.

6. The circular narrow-edge backlight module according to claim 5, wherein, An independent heat dissipation channel (551) is formed between adjacent heat dissipation ridges (550).

7. The circular narrow-edge backlight module according to claim 6, wherein A communication groove (552) is provided on the annular heat dissipation ridge (550), and under the action of the communication groove (552), the plurality of independent heat dissipation channels (551) can be fused with each other to jointly form a heat dissipation space (553).

8. The circular narrow-edge backlight module according to claim 7, wherein, A graphene heat dissipation sheet (554) is laid in the heat dissipation space (553) to absorb and dissipate the heat in the heat dissipation space (553).

9. A circular narrow-edge backlight module, comprising a backlight housing (1), and a receiving cavity (11) is formed inside the backlight housing (1), characterized in that, It also includes: A backlight FPC (2), which is laid in the backlight housing (1) through the receiving cavity (11); The backlight FPC (2) extends along the inner wall direction of the receiving cavity (11) to form an annular backlight FPC (2); Wherein, LED beads (21) are provided on the backlight FPC (2), and the plurality of LED beads (21) are evenly distributed on the backlight FPC (2) to achieve brightness uniformity.

10. The circular narrow-edge backlight module according to claim 9, wherein A cover plate assembly (3) on one side of the backlight housing (1) is buckled at the outer end of the receiving cavity (11), and the outer shape of the cover plate assembly (3) is correspondingly arranged with the backlight FPC (2) and the LED beads (21) thereon.

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