Liquid crystal display backlight module

Abstract

The utility model discloses a liquid crystal display backlight module. The liquid crystal display backlight module comprises a wrapping part with a gap, a first sealing partition plate and a second sealing partition plate. The first sealing partition plate and the second sealing partition plate are overlapped, and a containing space is formed between the first sealing partition plate and the second sealing partition plate. The backlight module further comprises a bearing block, a backlight flexible circuit board and a reinforcing plate, the bearing block is arranged at the end of the containing space and connected with the second sealing partition plate, and the backlight flexible circuit board and the reinforcing plate are sequentially arranged on the side, away from the second sealing partition plate, of the bearing block. The wrapping part is arranged on the outer side of the end of the containing space and covers the bearing block, the backlight flexible circuit board and the reinforcing plate. The reinforcing plate is fixedly connected with the backlight flexible circuit board so as to drive the area, corresponding to the vacancy, on the backlight flexible circuit board to be kept parallel to the reinforcing plate, the bending strength of the backlight flexible circuit board can be higher through matching of the reinforcing plate and the backlight flexible circuit board, and even if the vacancy exists, the backlight flexible circuit board can not be damaged. And the backlight flexible circuit board is not easy to deform.

Description

Technical Field

[0001] The utility model relates to the field of display screens, and particularly to a liquid crystal display backlight module. Background Art

[0002] With the continuous development of liquid crystal display technology and the diverse and thin-and-light requirements of the market for the size of liquid crystal panels, the development and industrialization process of backlight technologies have been accelerated. At the same time, due to the thin-and-light requirements, higher brightness requirements are imposed on the backlight module. After an ordinary FPC is soldered with LED lamps and FPC glue is pasted, it is matched with a light guide plate, and after the LED lamps emit light, the light is guided along the surface of the FPC.

[0003] Typically, for example, the patent document with the application number CN201910569620.X discloses a liquid crystal display backlight module, which includes a cover plate, a sensor disposed on the lower surface of the cover plate, a polarizer disposed on one side of the lower surface of the sensor in sequence, a liquid crystal display panel, and a lower polarizer. On one side of the lower surface of the lower polarizer, a light guide plate and a reflective film are further disposed in sequence, and a backlight adhesive iron is disposed on the lower surface of the reflective film; a driving IC and a module FPC are adhesively disposed on the upper surface of the liquid crystal display panel, a conductive copper foil is coated outside the driving IC, the conductive copper foil is electrically connected to the exposed copper of the module FPC, and the module FPC is electrically connected to the backlight adhesive iron. On the lower surface of the module FPC, a backlight light-shielding adhesive and a backlight FPC are further disposed in sequence. The backlight FPC is adhesively bonded to the light guide plate through lamp glue. An LED lamp is disposed at the bottom end of the light guide plate. The module FPC is electrically connected to the backlight FPC, and a TVS tube is further disposed on the module FPC.

[0004] The above patent document discloses a scheme of the cooperation between the backlight light-shielding adhesive and the backlight FPC, but there are still limitations in specific implementation:

[0005] Because with the narrow-edge design of mobile phone products, the adhesive area at the position of the backlight LED is reduced. Therefore, it is necessary to add single-sided adhesion at the light-shielding position and wrap it around the back of the backlight iron frame. Due to the structural interference between the backlight FPC and the light-shielding adhesive PET pull handle, corresponding notches need to be opened in the edge-sealing glue. The adhesive force at these two notch positions is reduced, which will cause the backlight FPC to separate from the glue frame during the drop test, resulting in a light leakage problem in the backlight display (that is, as Figure 3 shown, opening notches at the pull handle positions of the backlight FPC and the light-shielding adhesive PET will reduce the adhesive force at these two positions, and the backlight FPC is likely to separate from the glue frame, resulting in a light leakage phenomenon). Summary of the Utility Model

[0006] Based on this, it is necessary to provide a liquid crystal display backlight module to solve the problem that notching the pulling positions of the backlight FPC and the light-shielding adhesive PET in the above-mentioned background technology will reduce the adhesion force at these two positions, making it easy for the backlight FPC to separate from the glue frame and resulting in light leakage.

[0007] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0008] A liquid crystal display backlight module includes a wrapping portion with a vacancy, a first sealing partition board, and a second sealing partition board;

[0009] The first sealing partition board and the second sealing partition board are stacked and arranged, and a receiving space is formed between the two;

[0010] It further includes a supporting block, a backlight flexible circuit board, and a reinforcing plate. The supporting block is arranged at the end of the receiving space and is connected to the second sealing partition board. The backlight flexible circuit board and the reinforcing plate are sequentially arranged on the side of the supporting block away from the second sealing partition board;

[0011] The wrapping portion is arranged outside the end of the receiving space and covers the supporting block, the backlight flexible circuit board, and the reinforcing plate;

[0012] The reinforcing plate is fixedly connected to the backlight flexible circuit board to drive the area corresponding to the vacancy on the backlight flexible circuit board to maintain a state parallel to the reinforcing plate.

[0013] Further, the outer shapes of the backlight flexible circuit board and the reinforcing plate are matched.

[0014] Further, the reinforcing plate and the backlight flexible circuit board are adhesively fixed.

[0015] Further, a protrusion is provided at the edge of the reinforcing plate to form a groove for receiving the backlight flexible circuit board.

[0016] Further, the depth of the groove is not greater than the thickness of the backlight flexible circuit board.

[0017] Further, at least one protrusion is provided at one end of the reinforcing plate close to the wrapping portion, and at least one protrusion is also provided at the other end.

[0018] Further, an extended adhesive layer is provided on the protrusion for fixedly connecting the protrusion to the backlight flexible circuit board, and the extended adhesive layer is arranged between the backlight flexible circuit board and the supporting block.

[0019] Further, the length of the extended adhesive layer is not less than the length of the protrusion.

[0020] Further, a plurality of fixing columns are provided on the reinforcing plate for further limiting the backlight flexible circuit board.

[0021] Further, a plurality of the fixing posts are arranged at equal intervals along the surface of the reinforcing plate.

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

[0023] The utility model can cooperate the reinforcing plate with the backlight flexible circuit board, so that the backlight flexible circuit board has higher anti-bending strength. Even due to the existence of the vacancy, the backlight flexible circuit board will not be easily deformed.

[0024] Specifically, the first sealing partition plate and the second sealing partition plate are superposed. Since a receiving space will be formed between the two, the supporting block is arranged at the end of the receiving space and fixedly connected with the second sealing partition plate. Then, the backlight flexible circuit board and the reinforcing plate are sequentially arranged on the side of the supporting block away from the second sealing partition plate. Finally, the wrapping portion is arranged outside the end of the receiving space to cover the supporting block, the backlight flexible circuit board and the reinforcing plate. At this time, the reinforcing plate is fixedly connected with the backlight flexible circuit board to drive the area corresponding to the vacancy on the backlight flexible circuit board to be parallel to the reinforcing plate. Description of the Drawings

[0025] Figure 1 It is a side view of the wrapping portion provided in the prior art;

[0026] Figure 2 is Figure 1 a schematic structural view of the structure at A in

[0027] Figure 3 It is a front view of the wrapping portion provided in the prior art;

[0028] Figure 4 It is a schematic longitudinal sectional structural view of the side view of the reinforcing plate provided by the utility model;

[0029] Figure 5 It is a schematic structural view of the protrusion provided by the utility model;

[0030] Figure 6 It is a schematic structural view of the extended adhesive layer provided by the utility model;

[0031] Figure 7 It is a schematic structural view of the fixing post provided by the utility model.

[0032] The reference numerals in the drawings are explained as follows:

[0033] 1, wrapping portion; 2, first sealing partition plate; 3, second sealing partition plate; 4, supporting block; 5, backlight flexible circuit board; 6, reinforcing plate; 7, protrusion; 8, extended adhesive layer; 9, fixing post. Detailed Embodiments

[0034] To enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with 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 the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0035] As described in the background art, due to the narrow-edge design of mobile phone products, the adhesive area at the position of the backlight LED is reduced. Therefore, it is necessary to add a single-sided adhesive at the light-shielding position and wrap it around the back of the backlight iron frame. Due to the structural interference between the FPC of the backlight and the pull handle of the light-shielding adhesive PET, the edge-sealing adhesive needs to be opened with corresponding notches. The adhesive force at these two notch positions is reduced, which will cause the separation of the backlight FPC from the adhesive frame during the drop test, resulting in the problem of light leakage in the backlight display (that is, as Figure 3 shown, opening notches at the pull handle positions of the backlight FPC and the light-shielding adhesive PET will reduce the adhesive force at these two positions, and the backlight FPC is prone to separate from the adhesive frame, resulting in light leakage).

[0036] To solve this technical problem, the present utility model provides a liquid crystal display backlight module.

[0037] Specifically, please refer to Figures 1-7 , the liquid crystal display backlight module includes a wrapping part 1 with a vacancy, a first sealing partition 2, and a second sealing partition 3;

[0038] The first sealing partition 2 and the second sealing partition 3 are stacked and arranged, and an accommodating space is formed between the two;

[0039] It further includes a supporting block 4, a backlight flexible circuit board 5, and a reinforcing plate 6. The supporting block 4 is arranged at the end of the accommodating space and is connected to the second sealing partition 3. The backlight flexible circuit board 5 and the reinforcing plate 6 are sequentially arranged on the side of the supporting block 4 away from the second sealing partition 3;

[0040] The wrapping part 1 is arranged outside the end of the accommodating space and covers the supporting block 4, the backlight flexible circuit board 5, and the reinforcing plate 6;

[0041] The reinforcing plate 6 is fixedly connected to the backlight flexible circuit board 5 to drive the area corresponding to the vacancy on the backlight flexible circuit board 5 to be parallel to the reinforcing plate 6.

[0042] The present utility model can, through the cooperation of the reinforcing plate 6 and the backlight flexible circuit board 5, make the backlight flexible circuit board 5 have higher anti-bending strength, and the backlight flexible circuit board 5 will not easily bend. Even due to the existence of the vacancy, the backlight flexible circuit board 5 will not easily deform.

[0043] Specifically, the first sealing partition 2 and the second sealing partition 3 are superposed. Since a receiving space will be formed between the two, the supporting block 4 is arranged at the end of the receiving space and fixedly connected to the second sealing partition 3. Then, the backlight flexible circuit board 5 and the reinforcing plate 6 are sequentially arranged on the side of the supporting block 4 away from the second sealing partition 3. Finally, the wrapping portion 1 is arranged outside the end of the receiving space to cover the supporting block 4, the backlight flexible circuit board 5, and the reinforcing plate 6. At this time, the reinforcing plate 6 is fixedly connected to the backlight flexible circuit board 5 to drive the area corresponding to the vacancy on the backlight flexible circuit board 5 to be parallel to the reinforcing plate 6.

[0044] It should be noted that the vacancy position in Figure 3 is the vacancy setting position in this application.

[0045] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0046] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments can be combined with each other.

[0047] It should be noted that similar reference numerals and letters denote 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.

[0048] A liquid crystal display backlight module includes a wrapping portion 1 with a vacancy, a first sealing partition 2, and a second sealing partition 3;

[0049] The first sealing partition 2 and the second sealing partition 3 are superposed and a receiving space is formed between the two;

[0050] It further includes a supporting block 4, a backlight flexible circuit board 5, and a reinforcing plate 6. The supporting block 4 is arranged at the end of the receiving space and connected to the second sealing partition 3. The backlight flexible circuit board 5 and the reinforcing plate 6 are sequentially arranged on the side of the supporting block 4 away from the second sealing partition 3;

[0051] The wrapping portion 1 is arranged outside the end of the receiving space to cover the supporting block 4, the backlight flexible circuit board 5, and the reinforcing plate 6;

[0052] The reinforcing plate 6 is fixedly connected to the backlight flexible circuit board 5 to drive the area corresponding to the vacancy on the backlight flexible circuit board 5 to be parallel to the reinforcing plate 6.

[0053] The utility model can cooperate the reinforcing plate 6 with the backlight flexible circuit board 5, so that the backlight flexible circuit board 5 has higher anti-bending strength. Even due to the existence of the vacancy, the backlight flexible circuit board 5 will not easily deform.

[0054] Specifically, the first sealing partition 2 and the second sealing partition 3 are superposed. Since a receiving space will be formed between the two, the supporting block 4 is arranged at the end of the receiving space and fixedly connected to the second sealing partition 3. Then, the backlight flexible circuit board 5 and the reinforcing plate 6 are sequentially arranged on the side of the supporting block 4 away from the second sealing partition 3. Finally, the wrapping part 1 is arranged outside the end of the receiving space to cover the supporting block 4, the backlight flexible circuit board 5 and the reinforcing plate 6. At this time, the reinforcing plate 6 and the backlight flexible circuit board 5 are fixedly connected to drive the area of the backlight flexible circuit board 5 corresponding to the vacancy to be parallel to the reinforcing plate 6.

[0055] It should be noted that the vacancy position in Figure 3 is the vacancy setting position in this application.

[0056] In some specific embodiments, the outer shapes of the backlight flexible circuit board 5 and the reinforcing plate 6 are matched. Such a setting is to ensure that the reinforcing plate 6 can be fully attached and fixed to the backlight flexible circuit board 5 to prevent the situation that the backlight flexible circuit board 5 is not connected to the reinforcing plate 6.

[0057] In some specific embodiments, the reinforcing plate 6 and the backlight flexible circuit board 5 are adhesively fixed. Such a setting is to achieve the rapid fixation between the reinforcing plate 6 and the backlight flexible circuit board 5, but it is not limited to adhesive fixation. Other methods such as welding and screws can also be selected.

[0058] Further optimizing the liquid crystal display backlight module provided in Embodiment 1, a protrusion 7 is arranged at the edge of the reinforcing plate 6 to form a groove for receiving the backlight flexible circuit board 5. In this way of embedding the groove, the position of the backlight flexible circuit board 5 is further restricted.

[0059] In some specific embodiments, the depth of the groove is not greater than the thickness of the backlight flexible circuit board 5. At most, it is equal to the thickness of the backlight flexible circuit board 5 to prevent the situation that the depth of the groove is too large and affects the installation of other components inside the receiving space.

[0060] In some specific embodiments, at least one protrusion 7 is arranged at one end of the reinforcing plate 6 close to the wrapping part 1, and at least one protrusion 7 is also arranged at the other end. Such a setting is to ensure the limiting effect of the backlight flexible circuit board 5 without affecting the use of the device.

[0061] In some specific embodiments, an extended adhesive layer 8 is provided on the protrusion 7. The extended adhesive layer 8 is used to fixedly connect the protrusion 7 to the backlight flexible circuit board 5, and the extended adhesive layer 8 is disposed between the backlight flexible circuit board 5 and the supporting block 4. This is set to further limit the edge of the surface of the backlight flexible circuit board 5 away from the groove through the extended adhesive layer 8, so that the protection of the backlight flexible circuit board 5 is higher.

[0062] In some specific embodiments, the length of the extended adhesive layer 8 is not less than the length of the protrusion 7. That is, it further ensures the coverage amount of the extended adhesive layer 8 at the edge of the backlight flexible circuit board 5, so that both sides of the surface of the backlight flexible circuit board 5 can be provided with strength support.

[0063] The liquid crystal display backlight module provided in Embodiment 1 or 2 is further optimized. A plurality of fixing posts 9 are provided on the reinforcing plate 6 for further defining the backlight flexible circuit board 5.

[0064] In some specific embodiments, the plurality of fixing posts 9 are arranged at equal intervals along the surface of the reinforcing plate 6.

[0065] Another embodiment for the connection between the reinforcing plate 6 and the backlight flexible circuit board 5 is provided, that is, on the basis of adhesion, the adhesion of the fixed position is carried out. Specifically, through a plurality of fixing posts 9 arranged at equal intervals along the surface of the reinforcing plate 6, the backlight flexible circuit board 5 is not only adhered to the surface of the reinforcing plate 6, but at the same time, the plurality of fixing posts 9 will further define the backlight flexible circuit board 5. When the adhesion between the backlight flexible circuit board 5 and the edge of the reinforcing plate 6 is not in place, the plurality of fixing posts 9 will play an auxiliary fixing role.

[0066] The use process of the liquid crystal display backlight module provided by the present utility model is as follows: The first sealing partition 2 and the second sealing partition 3 are superposed. Since a receiving space will be formed between the two, therefore, the supporting block 4 is disposed at the end of the receiving space and fixedly connected to the second sealing partition 3. Then, the backlight flexible circuit board 5 and the reinforcing plate 6 are sequentially disposed on the side of the supporting block 4 away from the second sealing partition 3. Finally, the wrapping portion 1 is disposed outside the end of the receiving space and covers the supporting block 4, the backlight flexible circuit board 5, and the reinforcing plate 6. At this time, the reinforcing plate 6 and the backlight flexible circuit board 5 are fixedly connected to drive the area corresponding to the vacancy on the backlight flexible circuit board 5 to be parallel to the reinforcing plate 6.

[0067] In the present utility model, unless otherwise clearly specified or 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 an integral body; 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 communication of two components or the interaction relationship between two components, unless otherwise clearly limited. 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.

[0068] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of them. The preferred embodiments of the present utility model are given in the drawings, 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, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent substitution 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 within the scope of the patent protection of the present utility model by the same token.

Claims

1. A liquid crystal display backlight module, characterized in that: It comprises a wrapping portion (1) having a gap, a first sealing plate (2) and a second sealing plate (3); The first sealing plate (2) and the second sealing plate (3) are overlapped and a containing space is formed between the two; It also comprises a supporting block (4), a backlight flexible circuit board (5) and a reinforcing plate (6), wherein the supporting block (4) is arranged at the end of the accommodating space and is connected to the second sealing plate (3), and the backlight flexible circuit board (5) and the reinforcing plate (6) are arranged in sequence on a side of the supporting block (4) away from the second sealing plate (3); The wrapping portion (1) is arranged outside the end of the accommodating space and covers the supporting block (4), the backlight flexible circuit board (5) and the reinforcing plate (6); The reinforcing plate (6) is fixedly connected to the backlight flexible circuit board (5) so as to drive the area on the backlight flexible circuit board (5) corresponding to the vacancy to maintain a state parallel to the reinforcing plate (6).

2. The liquid crystal display backlight module according to claim 1, characterized in that: The backlight flexible circuit board (5) and the reinforcing plate (6) are arranged to match each other in appearance.

3. The liquid crystal display backlight module according to claim 1, characterized in that: The reinforcing plate (6) is bonded and fixed to the backlight flexible circuit board (5).

4. The liquid crystal display backlight module according to claim 2 or 3, characterized in that: The edge of the reinforcing plate (6) is provided with a protrusion (7) to form a groove for accommodating the backlight flexible circuit board (5).

5. The liquid crystal display backlight module according to claim 4, characterized in that: The depth of the groove is no greater than the thickness of the backlight flexible circuit board (5).

6. The liquid crystal display backlight module according to claim 5, characterized in that: The reinforcing plate (6) is provided with at least one protrusion (7) at one end close to the wrapping portion (1), and at least one protrusion (7) is also provided at the other end.

7. The liquid crystal display backlight module according to claim 4, characterized in that: An extended adhesive layer (8) is provided on the protrusion (7), the extended adhesive layer (8) is used to fixedly connect the protrusion (7) and the backlight flexible circuit board (5), and the extended adhesive layer (8) is provided between the backlight flexible circuit board (5) and the supporting block (4).

8. The liquid crystal display backlight module according to claim 7, characterized in that: The length of the extended adhesive layer (8) is not less than the length of the protrusion (7).

9. The liquid crystal display backlight module according to claim 2 or 3, characterized in that: A plurality of fixing columns (9) are arranged on the reinforcing plate (6) to further limit the backlight flexible circuit board (5).

10. The liquid crystal display backlight module according to claim 9, characterized in that: The plurality of fixing columns (9) are arranged at equal intervals along the surface of the reinforcing plate (6).

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