Low-cost backlight light bar assembly

Abstract

The utility model discloses a low-cost backlight light bar assembly which is composed of a full-page light bar and a makeup double-faced adhesive tape assembly. The full-page lamp strip comprises a rectangular PCB, LED lamp beads and bent FPC boards, the LED lamp beads are evenly distributed on the PCB to form the lamp strip, and the FPC boards are welded to the bottom face of the PCB and correspond to the lamp strip in a one-to-one mode. The makeup double-faced adhesive tape assembly comprises double-faced adhesive tape films and single-faced adhesive tapes, the double-faced adhesive tape films are divided into a left plate and a right plate which are respectively adhered to the left side and the right side of the FPC board on the bottom surface of the PCB, and the single-faced adhesive tapes are respectively adhered to the left side and the right side of each plate of double-faced adhesive tape film. The light bar assembly is formed by splicing the printed circuit board (PCB), the flexible circuit board (FPC) and the makeup double-sided adhesive tape, so that the production and manufacturing cost of the backlight light bar can be reduced, and the pasting efficiency of the backlight assembly light bar can be remarkably improved.

Description

Technical Field

[0001] The utility model relates to the field of backlight module component assembly, in particular to a low-cost backlight light bar assembly. Background Art

[0002] The light bar is an important component of the backlight source. To ensure that the light bar can be stably fixed in the backlight source, double-sided tape must be used. The light bar in consumer and industrial control backlight sources is mostly made by welding LED lights on a full-page flexible printed circuit (FPC), and then a long strip of double-sided tape is pasted on the bottom of the full-page light bar to make a light bar and double-sided tape assembly. Due to the relatively high cost of FPC substrate materials, the existing light bar structure is usually an integral type, such as Figure 1 As shown, the extended portion of the gold finger segment will cause the arrangement to be uncompact and waste a lot of scraps, resulting in an increase in the layout cost of the light strip. In addition, when pasting the double-sided tape, the light strips need to be pasted one by one, and the pasting efficiency is very low.

[0003] Utility model patent CN202282908U discloses an FPC structure of a backlight source, which is designed as a segmented FPC board, and is composed of a rectangular FPC board and a bent FPC board, which is easy to split and arrange on the circuit board. The split FPC can be arranged in double or more quantities, effectively reducing the cost. However, this solution still has a certain degree of waste, and does not solve the problem of low efficiency of double-sided adhesive pasting. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned prior art, the utility model provides a low-cost backlight light bar assembly, which is composed of a printed circuit board (PCB) + a flexible circuit board (FPC) + a double-sided tape splicing method. It can not only reduce the production cost of the backlight light bar, but also significantly improve the pasting efficiency of the backlight assembly light bar.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A low-cost backlight light bar assembly, consisting of a full-page light bar and a spliced ​​double-sided adhesive assembly; the full-page light bar comprises a rectangular PCB board, LED lamp beads and a bent FPC board, wherein the LED lamp beads are evenly arranged on the PCB board to form a light bar, and the FPC board is welded to the bottom surface of the PCB board and corresponds to the light bar one by one; the spliced ​​double-sided adhesive assembly comprises left and right double-sided adhesive films and single-sided adhesive glue pasted on the double-sided adhesive films, wherein the left and right double-sided adhesive films are respectively pasted on the left and right sides of the FPC board on the bottom surface of the PCB board, and each double-sided adhesive film is provided with an adhesive strip that can be used for pasting and corresponds to the light bar one by one, and the single-sided adhesive glue is pasted on the left and right sides of the surface of each double-sided adhesive film.

[0007] Furthermore, the surface of the double-sided adhesive film is also covered with a protective film, and the single-sided adhesive is adhered to the protective film.

[0008] Compared with the prior art, the advantages and effects of the utility model are:

[0009] 1. Use PCB board instead of FPC board as the substrate for welding LED lamp beads. Only the gold finger part of the light bar is spliced ​​with FPC, which makes the layout of the whole light bar more compact. The cost of PCB is much lower than that of FPC. Under the same size, it can minimize the waste of scraps, thus solving the problem of high material cost and layout cost of the existing whole FPC light bar;

[0010] 2. The whole light strip is glued by using a double-sided adhesive tape assembly. Compared with the traditional method of pasting a single light strip, this structure can effectively improve the lamination efficiency of the light strip and the double-sided adhesive tape, and further reduce the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure is a schematic diagram of the layout of a full-page flexible circuit board light strip in the prior art.

[0012] Figure 2 It is a structural schematic diagram of the utility model.

[0013] Figure 3 It is a front structural schematic diagram of the full-page light strip in the utility model.

[0014] Figure 4 It is a schematic diagram of the back structure of the full-page light strip in the utility model.

[0015] Figure 5 It is a structural schematic diagram of the double-sided adhesive tape assembly of the utility model.

[0016] Figure 6 for Figure 5 Sectional view along the A-A plane.

[0017] Figure number identification: 1. PFC board; 11. Edge material; 2. LED lamp beads; 3. FPC board; 4. Double-sided adhesive film; 5. Single-sided adhesive; 6. Protective film; 7. Release film. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with embodiments, but the present invention is not limited to these embodiments.

[0019] The low-cost backlight strip assembly described in this embodiment is as follows: Figure 2 As shown, it is composed of a full-page light bar and a double-sided adhesive assembly; Figure 3 and 4As shown, the whole light strip includes a rectangular PCB board 1, LED lamp beads 2 and a bent FPC board 3, wherein the LED lamp beads 2 are evenly arranged on the PCB board 1 to form a plurality of groups of light strips, and the FPC boards 3 are welded and stacked on the bottom surface of the PCB board 1 from bottom to top in sequence to correspond to each light strip.

[0020] like Figure 5 and 6 As shown, the double-sided adhesive assembly includes left and right double-sided adhesive films 4 and single-sided adhesive 5 pasted on the double-sided adhesive films 4, wherein the left and right double-sided adhesive films 4 are respectively pasted on the left and right sides of the FPC board 3 on the bottom surface of the PCB board 1, and each double-sided adhesive film 4 is provided with an adhesive strip that can be used for pasting and corresponds to the light bar one by one, and the single-sided adhesive 5 is pasted on the protective film 6 on the surface of each double-sided adhesive film 4, and a single-sided adhesive 5 is pasted on the left and right sides of each double-sided adhesive film 4. In order to facilitate tearing off the protective film 6, a tear handle is provided at the tail of each single-sided adhesive 5.

[0021] The working principle of this embodiment is as follows:

[0022] 1. First, use a machine to solder the LED lamp beads on the entire rectangular PCB board 1;

[0023] 2. Use a soldering iron to manually solder the bent FPC board 3 to the corresponding positions on the bottom surface of the PCB board 1 from bottom to top to connect with each light strip;

[0024] 3. Tear off the release film 7 of the bottom double-sided adhesive film 4, avoid the position of the FPC board 3 in the middle of the light bar, and stick the left and right double-sided adhesive films 4 on the left and right sides of the FPC board 3 on the bottom of the PCB board 1 respectively, and complete the bonding of the entire light bar and the double-sided adhesive assembly;

[0025] 4. When using the light strip, just pull up the tear handle of the single-sided adhesive 5 to peel off the protective film 6 on the surface of the double-sided adhesive film 4. The edge material 11 of the PCB board 1 can play the role of fixing the light strip. The operator needs to break off the edge material 11 on one side first, and then break out the light strips one by one for use. When the last light strip is broken, the edge material 11 on the other side is separated from the light strip, and the use of the entire light strip is completed.

Claims

1. A low-cost backlight strip assembly, characterized in that: It is composed of a full-page light bar and a double-sided adhesive tape assembly; The full-page light bar comprises a rectangular PCB board (1), LED lamp beads (2) and a bent FPC board (3), wherein the LED lamp beads (2) are evenly arranged on the PCB board (1) to form a light bar, and the FPC board (3) is welded to the bottom surface of the PCB board (1) and corresponds to the light bar one by one; The panel double-sided adhesive assembly comprises left and right double-sided adhesive films (4) and single-sided adhesive (5) adhered to the double-sided adhesive films (4), wherein the left and right double-sided adhesive films (4) are adhered to the left and right sides of the FPC board (3) on the bottom surface of the PCB board (1), respectively, and each panel of the double-sided adhesive film (4) is provided with an adhesive strip corresponding to the light bar, and the single-sided adhesive (5) is adhered to the left and right sides of the surface of each panel of the double-sided adhesive film (4).

2. A low-cost backlight strip assembly according to claim 1, characterized in that: The surface of the double-sided adhesive film (4) is also covered with a layer of protective film (6), and the single-sided adhesive (5) is adhered to the protective film (6).

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