FPC assembly structure and backlight module

Abstract

The utility model discloses an FPC assembly structure and a backlight module, the FPC assembly structure comprises a back plate, the back plate comprises a bottom plate and a side plate, the side plate is arranged on the circumferential edge of the bottom plate in a surrounding manner; the FPC comprises a main body part and a leading-out part, the main body part is adhered to the inner wall of the side plate, the leading-out part is connected to the lower end of the main body part, and the leading-out part penetrates out of the bottom plate downwards from the top surface of the bottom plate; and the leading-out part is bonded and fixed with the bottom plate, and the leading-out part is connected with the bottom plate through a limiting structure. According to the backlight module, the lead-out part and the bottom plate are fixedly bonded and connected through the limiting structure, it can be guaranteed that the lead-out part is stably installed on the bottom plate, the lead-out part is prevented from being separated from the bottom plate when stressed, and therefore stable installation of the main body part and the LEDs is guaranteed, and the backlight effect of the backlight module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, in particular to an FPC assembly structure and a backlight module. Background Art

[0002] A backlight module is a light source device used to ensure the light emitted behind a liquid crystal display screen. The quality of the backlight module directly affects the liquid crystal imaging quality. The backlight module of an in-vehicle liquid crystal display device includes a side-in type and a direct-lit type. The light bar of the side-in type backlight module is installed on the inner side wall of the backplane. Specifically, the main body of the FPC is bonded to the inner side wall of the backplane, and the lead-out part of the FPC is bent and passes through the backplane and is bonded and fixed to the backplane. Since the bonding area between the lead-out part of the FPC and the backplane is small, the fixing property of the lead-out part of the FPC is poor. When the lead-out part of the FPC is stressed, it is easy to be lifted and pull the main body part of the FPC, causing the main body part of the FPC to drive the LED to arch, affecting the backlight effect. Summary of the Utility Model

[0003] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides an FPC assembly structure and a backlight module to stably install the FPC, thereby improving the backlight effect.

[0004] The technical solution adopted by the utility model to solve its problems is as follows:

[0005] An FPC assembly structure includes:

[0006] A backplane, which includes a bottom plate and side plates, and the side plates surround the circumferential edge of the bottom plate;

[0007] An FPC, which includes a main body part and a lead-out part. The main body part is bonded to the inner wall of the side plate, the lead-out part is connected to the lower end of the main body part, and the lead-out part passes through the bottom plate downward from the top surface of the bottom plate;

[0008] The lead-out part is bonded and fixed to the bottom plate, and the lead-out part is connected to the bottom plate through a limiting structure.

[0009] Further, the bottom plate is provided with a through hole adapted to the lead-out part, the lead-out part passes through the bottom plate from top to bottom through the through hole, and the lead-out part is bonded and fixed to the bottom plate through double-sided tape.

[0010] Further, a limiting groove adapted to the lead-out part is provided on the top surface of the bottom plate. The limiting groove connects the side plate and the through hole, and the lead-out part is arranged in the limiting groove and passes through the bottom plate from top to bottom through the through hole.

[0011] Further, a light-shielding adhesive is bonded to the bottom surface of the bottom plate, and the light-shielding adhesive completely covers the through hole and partially covers the bottom plate and the lead-out part.

[0012] Further, two limiting posts are provided on the bottom surface of the bottom plate. The lead-out part is arranged between the two limiting posts, and two limiting notches adapted to the two limiting posts are provided on the lead-out part. The limiting posts are clamped in the corresponding limiting notches.

[0013] The present utility model further provides a backlight module, including: an FPC assembly structure, a plurality of LEDs are arranged at intervals on one side of the main body portion facing away from the side plate, an optical component is laid in the back plate, a foam adhesive is arranged on the circumferential edge of the top surface of the optical component, and the foam adhesive is tightly connected to the side plate.

[0014] Further, the optical component includes a reflective sheet, a light guide plate, and an optical film arranged in sequence from bottom to top. The foam adhesive is adhesively fixed to the circumferential edge of the top surface of the optical film through a double-sided adhesive.

[0015] Further, the side plate includes a first side plate and a second side plate arranged adjacent to each other. The main body portion is adhesively fixed to the inner wall of the first side plate. The reflective sheet includes a bottom reflective sheet and a side reflective sheet. The bottom reflective sheet is adhesively fixed to the bottom plate, and the side reflective sheet is arranged corresponding to the inner wall of the second side plate.

[0016] Further, the light guide plate extends towards the second side plate to form a convex block. The second side plate is provided with a mounting groove corresponding to the convex block. A buffer pad is arranged in the mounting groove, and a groove adapted to the convex block is provided in the buffer pad. The convex block is arranged in the groove;

[0017] And / or, the light guide plate and the optical film extend towards the second side plate to form a clamping protrusion. The second side plate is provided with a clamping groove adapted to the clamping protrusion. The clamping protrusion is clamped in the clamping groove;

[0018] The side reflective sheet is provided with an avoidance hole adapted to the convex block and / or the clamping protrusion.

[0019] Further, the light guide plate and the optical film extend towards the first side plate to form a clamping portion. The first side plate is provided with a clamping groove adapted to the clamping portion. The clamping portion is clamped in the clamping groove, and the main body portion is provided with an avoidance portion adapted to the clamping portion.

[0020] The beneficial effects of the FPC assembly structure and the backlight module provided by the present utility model are as follows:

[0021] By adhesively fixing and connecting with a limiting structure between the lead-out part and the bottom plate, it can ensure that the lead-out part is stably installed on the bottom plate, avoid the lead-out part from detaching from the bottom plate when stressed, thereby ensuring the stable installation of the main body portion and the LEDs, and further improving the backlight effect of the backlight module. Description of the Drawings

[0022] Figure 1 Schematic diagram of the FPC assembly structure of Embodiment 1;

[0023] Figure 2 Exploded view of the FPC assembly structure of Embodiment 1;

[0024] Figure 3 Schematic diagram of another perspective of the FPC assembly structure of Embodiment 1;

[0025] Figure 4 Partial exploded view of another perspective of the FPC assembly structure of Embodiment 1;

[0026] Figure 5 Exploded view of the backlight module of Embodiment 2;

[0027] Figure 6 Schematic diagram of the structures of the light guide plate, the reflective sheet and the back plate in Embodiment 2;

[0028] Figure 7 Partial schematic diagram of the structure of the backlight module of Embodiment 2.

[0029] Among them, the meanings of the reference numerals are as follows:

[0030] 1. Back plate; 11. Bottom plate; 111. Through hole; 112. Limit groove; 113. Limit post; 12. Side plate; 121. First side plate; 1211. Clamping groove; 122. Second side plate; 1221. Installation groove; 1222. Card slot; 2. FPC; 21. Main body part; 211. Avoidance part; 22. Lead-out part; 221. Limit notch; 3. Thermal conductive double-sided adhesive; 4. Double-sided adhesive; 5. Light-shielding adhesive; 6. LED; 7. Optical component; 71. Reflective sheet; 711. Bottom reflective sheet; 712. Side reflective sheet; 713. Avoidance hole; 72. Light guide plate; 721. Protrusion; 73. Optical film; 731. Diffusion film; 732. Brightness enhancement film; 733. Light enhancement film; 74. Card convex; 75. Clamping part; 8. Foam adhesive; 9. Buffer pad; 91. Groove. Detailed implementation manners

[0031] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation to the present utility model.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0034] Example 1

[0035] See also Figures 1-4 The present embodiment provides an FPC assembly structure, including a back plate 1 and an FPC2, wherein the back plate 1 includes a bottom plate 11 and a side plate 12, and the side plate 12 is arranged around the circumferential edge of the bottom plate 11. The FPC2 includes a main body 21 and a lead-out portion 22, wherein the main body 21 is bonded to the inner wall of the side plate 12, and the lead-out portion 22 is connected to the lower end of the main body 21, and the lead-out portion 22 passes through the bottom plate 11 downward from the top surface of the bottom plate 11. The lead-out portion 22 is bonded and fixed to the bottom plate 11, and the lead-out portion 22 is connected to the bottom plate 11 through a limiting structure.

[0036] Therefore, this embodiment ensures that the lead-out part 22 is firmly mounted on the bottom plate 11 by bonding and fixing the lead-out part 22 to the bottom plate 11 and connecting them with a limiting structure, thereby preventing the lead-out part 22 from being separated from the bottom plate 11 when subjected to force, thereby ensuring the firm installation of the main body 21.

[0037] Specifically, the bottom plate 11 is a rectangular parallelepiped structure, and the two opposite long sides and the two opposite short sides of the bottom plate 11 are provided with side plates 12, and the bottom plate 11 and the side plates 12 are an integral structure, so that a semi-enclosed installation cavity is formed by four side plates 12 and the bottom plate 11. The inner walls of the two opposite side plates 12 extending in the length direction are bonded and fixed to the main body 21 of the FPC 2 by means of a thermally conductive double-sided adhesive 3, and the bottom ends of the two main bodies 21 extend toward each other to form lead-out portions 22, and the two lead-out portions 22 pass through the bottom plate 11 to be connected to external components.

[0038] The bottom plate 11 is provided with a through hole 111 adapted to the lead-out portion 22. The lead-out portion 22 passes through the bottom plate 11 from top to bottom through the through hole 111, and the lead-out portion 22 and the bottom plate 11 are bonded and fixed by double-sided adhesive tape 4. In this way, the double-sided adhesive tape 4 can fix the lead-out portion 22 on the bottom plate 11.

[0039] The bottom surface of the bottom plate 11 is bonded with a light shielding glue 5, which completely covers the through hole 111 and partially covers the bottom plate 11 and the lead-out portion 22. The setting of the through hole 111 has the risk of light leakage, and the light shielding glue 5 completely covers the through hole 111 and the bottom plate 11 and the lead-out portion 22 near the through hole 111 to ensure the light shielding effect.

[0040] On this basis, a limiting groove 112 adapted to the lead-out portion 22 is provided on the top surface of the bottom plate 11. The limiting groove 112 is connected to the side plate 12 and the through hole 111. The lead-out portion 22 is arranged in the limiting groove 112 and passes through the bottom plate 11 from top to bottom through the through hole 111. The arrangement of the limiting groove 112 can limit the lead-out portion 22, thereby improving the stability of the installation of the lead-out portion 22.

[0041] Moreover, two limiting posts 113 are provided on the bottom surface of the bottom plate 11. The lead-out portion 22 is arranged between the two limiting posts 113, and two limiting notches 221 adapted to the two limiting posts 113 are provided on the lead-out portion 22. The limiting posts 113 are clamped in the corresponding limiting notches 221. The clamping connection between the limiting posts 113 and the limiting notches 221 further limits the lead-out portion 22, making the installation of the lead-out portion 22 more stable.

[0042] In summary, in the FPC assembly structure of this embodiment, the bottom plate 11 and the lead-out portion 22 are bonded and fixed by the double-sided tape 4, the lead-out portion 22 is recessed in the limiting groove 112, and the clamping structure of the limiting posts 113 and the limiting notches 221 enable the lead-out portion 22 to be stably installed on the bottom plate 11, preventing the lead-out portion 22 from detaching from the bottom plate 11 when stressed, thereby ensuring the stable installation of the main body portion 21.

[0043] Embodiment 2

[0044] Refer to Figures 5-7 , this embodiment provides a backlight module, including the FPC assembly structure of Embodiment 1. A plurality of LEDs 6 are arranged at intervals on the side of the main body portion 21 facing away from the side plate 12. An optical component 7 is laid in the back plate 1. A foam adhesive 8 is provided at the circumferential edge of the top surface of the optical component 7, and the foam adhesive 8 is tightly connected to the side plate 12.

[0045] Since the lead-out portion 22 of the FPC 2 is stably installed on the bottom plate 11, preventing the lead-out portion 22 from detaching from the bottom plate 11 when stressed, ensuring the stable installation of the main body portion 21, thus enabling the stable installation of the LEDs 6, and further improving the backlight effect of the backlight module.

[0046] Specifically, the optical component 7 includes a reflective sheet 71, a light guide plate 72, and an optical film 73 arranged in sequence from bottom to top. The foam adhesive 8 is bonded and fixed to the circumferential edge of the top surface of the optical film 73 by the double-sided tape 4. The reflective sheet 71, the light guide plate 72, and the optical film 73 are connected by the double-sided tape 4, thereby ensuring the stable installation of the optical component 7. The optical film 73 includes a diffusion film 731, a brightness enhancement film 732, and a brightening film 733 arranged in sequence from bottom to top.

[0047] In this embodiment, the side plate 12 includes a first side plate 121 and a second side plate 122 which are arranged adjacent to each other. The main body portion 21 is adhesively fixed to the inner wall of the first side plate 121. The reflecting sheet 71 includes a bottom reflecting sheet 711 and a side reflecting sheet 712. The bottom reflecting sheet 711 is adhesively bonded to the bottom plate 11, and the side reflecting sheet 712 is arranged corresponding to the inner wall of the second side plate 122. There are two opposite first side plates 121 extending along the length direction, and two opposite second side plates 122 extending along the width direction. The first side plate 121 and the second side plate 122 are adjacent to each other to form a rectangular structure. The cooperation between the side reflecting sheet 712 and the bottom reflecting sheet 711 can ensure that the light emitted by the LED 6 is evenly reflected to the light guide plate 72, thus ensuring the light output effect of the backlight module.

[0048] On this basis, the light guide plate 72 extends a convex block 721 towards the second side plate 122. The second side plate 122 is provided with a mounting groove 1221 corresponding to the convex block 721. A buffer pad 9 is arranged in the mounting groove 1221. The buffer pad 9 is provided with a groove 91 adapted to the convex block 721, and the convex block 721 is arranged in the groove 91. And / or, the light guide plate 72 and the optical film 73 extend a clamping protrusion 74 towards the second side plate 122. The second side plate 122 is provided with a clamping groove 1222 adapted to the clamping protrusion 74, and the clamping protrusion 74 is clamped in the clamping groove 1222. The side reflecting sheet 712 is provided with an avoidance hole 713 adapted to the convex block 721 and / or the clamping protrusion 74.

[0049] This embodiment simultaneously has the matching structure of the convex block 721 and the groove 91 and the matching structure of the clamping protrusion 74 and the clamping groove 1222, so as to ensure the stable installation of the light guide plate 72 and the optical film 73 and ensure the light output effect of the optical module. The setting of the buffer pad 9 can prevent the light guide plate 72 from being damaged due to collision.

[0050] Moreover, the light guide plate 72 and the optical film 73 extend towards the first side plate 121 to form a clamping portion 75. The first side plate 121 is provided with a clamping groove 1211 adapted to the clamping portion 75, and the clamping portion 75 is clamped in the clamping groove 1211. The main body portion 21 is provided with an avoidance portion 211 corresponding to the clamping portion 75. Thus, the light guide plate 72 and the optical film 73 are both provided with matching structures with the first side plate 121 and the second side plate 122, further improving the installation stability of the light guide plate 72 and the optical film 73.

[0051] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include the technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. An FPC assembly structure, characterized in that: include: A back plate (1), the back plate (1) comprising a bottom plate (11) and a side plate (12), the side plate (12) being arranged around the circumferential edge of the bottom plate (11); An FPC (2), the FPC (2) comprising a main body (21) and a lead-out portion (22), the main body (21) being bonded to the inner wall of the side plate (12), the lead-out portion (22) being connected to the lower end of the main body (21), and the lead-out portion (22) passing through the bottom plate (11) downward from the top surface of the bottom plate (11); The lead-out portion (22) is bonded and fixed to the bottom plate (11), and the lead-out portion (22) and the bottom plate (11) are connected via a limiting structure.

2. The FPC assembly structure according to claim 1, characterized in that: The bottom plate (11) is provided with a through hole (111) adapted to the lead-out portion (22); the lead-out portion (22) passes through the bottom plate (11) from top to bottom through the through hole (111); and the lead-out portion (22) and the bottom plate (11) are bonded and fixed by double-sided adhesive (4).

3. The FPC assembly structure according to claim 2, characterized in that: The top surface of the bottom plate (11) is provided with a matching limiting groove (112) corresponding to the lead-out portion (22); the limiting groove (112) connects the side plate (12) and the through hole (111); the lead-out portion (22) is arranged in the limiting groove (112) and passes through the bottom plate (11) from top to bottom through the through hole (111).

4. The FPC assembly structure according to claim 2, characterized in that: The bottom surface of the bottom plate (11) is bonded with a light shielding adhesive (5), and the light shielding adhesive (5) completely covers the through hole (111) and partially covers the bottom plate (11) and the lead-out portion (22).

5. The FPC assembly structure according to claim 1, characterized in that: The bottom surface of the bottom plate (11) is provided with two limiting posts (113), the lead-out portion (22) is provided between the two limiting posts (113), and the lead-out portion (22) is provided with two matching limiting notches (221) corresponding to the two limiting posts (113), and the limiting posts (113) are clamped in the corresponding limiting notches (221).

6. A backlight module, characterized in that: It comprises: the FPC assembly structure according to any one of claims 1 to 5, a plurality of LEDs (6) are arranged at intervals on the side of the main body (21) facing away from the side panel (12), an optical component (7) is laid inside the back panel (1), a foam glue (8) is provided on the circumferential edge of the top surface of the optical component (7), and the foam glue (8) is tightly connected to the side panel (12).

7. The backlight module according to claim 6, characterized in that: The optical component (7) comprises a reflective sheet (71), a light guide plate (72) and an optical film (73) which are arranged in sequence from bottom to top, and the foam adhesive (8) is bonded and fixed to the circumferential edge of the top surface of the optical film (73) by means of a double-sided adhesive (4).

8. The backlight module according to claim 7, characterized in that: The side panel (12) comprises a first side panel (121) and a second side panel (122) which are arranged adjacent to each other; the main body (21) is bonded and fixed to the inner wall of the first side panel (121); the reflective sheet (71) comprises a bottom reflective sheet (711) and a side reflective sheet (712); the bottom reflective sheet (711) is bonded to the bottom panel (11); and the side reflective sheet (712) is arranged corresponding to the inner wall of the second side panel (122).

9. The backlight module according to claim 8, characterized in that: The light guide plate (72) is provided with a protrusion (721) extending toward the second side plate (122); the second side plate (122) is provided with a mounting groove (1221) corresponding to the protrusion (721); a buffer pad (9) is provided in the mounting groove (1221); the buffer pad (9) is provided with a matching groove (91) corresponding to the protrusion (721); and the protrusion (721) is arranged in the groove (91); And / or, the light guide plate (72) and the optical film (73) have a locking protrusion (74) extending toward the second side plate (122), the second side plate (122) is provided with a matching locking groove (1222) corresponding to the locking protrusion (74), and the locking protrusion (74) is locked in the locking groove (1222); The side reflection sheet (712) is provided with a matching avoidance hole (713) corresponding to the protrusion (721) and / or the locking protrusion (74).

10. The backlight module according to claim 8, characterized in that: The light guide plate (72) and the optical film (73) extend toward the first side plate (121) to form a clamping portion (75); the first side plate (121) is provided with a matching clamping groove (1211) corresponding to the clamping portion (75); the clamping portion (75) is clamped in the clamping groove (1211); and the main body (21) is provided with a matching avoidance portion (211) corresponding to the clamping portion (75).

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