Small-size backlight module

Abstract

The utility model discloses a small-size backlight module. The small-size backlight module comprises a first flexible circuit board, a second flexible circuit board and a backlight assembly, the first flexible circuit board and the second flexible circuit board are respectively arranged on the backlight assembly, the first flexible circuit board is provided with a first component area and a second component area, a gap is reserved between the first component area and the second component area, the gap is covered with a grounded copper layer, and the first flexible circuit board and the second flexible circuit board are arranged on the backlight assembly. The second flexible circuit board is provided with a third component area, the third component area is arranged on the copper layer of the gap, and a ground wire of the third component area is electrically connected with the copper layer. The gap is used for avoiding the second flexible circuit board, so that the length of the second flexible circuit board is shortened, raw materials are saved, and the structure is compact.

Description

Technical Field

[0001] The utility model relates to the field of backlight, in particular to a small-volume backlight module. Background Art

[0002] In the prior art, in order to save the peripheral size of the electronic device, the component areas of the FPC equipped with TP and TFT are all set in the same direction. However, this method will cause part of the TP FPC to be lengthened to avoid the TFT FPC, so that the TP FPC needs to be lengthened to avoid it, which not only consumes excess materials but also has a larger size. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a small-volume backlight module.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A small-volume backlight module comprises: a first flexible circuit board, a second flexible circuit board and a backlight assembly; the first flexible circuit board and the second flexible circuit board are respectively arranged on the backlight assembly, a first component area and a second component area are arranged on the first flexible circuit board, a gap is left between the first component area and the second component area, the gap is covered with a grounded copper layer, the second flexible circuit board is provided with a third component area, the third component area is arranged on the copper layer in the gap, and the ground wire of the third component area is electrically connected to the copper layer.

[0006] In one embodiment, a conductive reinforcing sheet is provided on the opposite side of the second flexible circuit board to the third component area.

[0007] In one embodiment, the conductive reinforcement sheet is a steel sheet.

[0008] In one embodiment, a conductive double-sided adhesive is provided on a side of the steel sheet away from the second flexible circuit board.

[0009] In one embodiment, a PI window is formed on a side of the third component area facing the conductive reinforcing sheet, and a grounded copper foil is disposed in the PI window, and the copper foil is electrically connected to the conductive reinforcing sheet.

[0010] In one embodiment, the first component area and the second component area bypass the copper layer to share a common ground.

[0011] In one embodiment, the second flexible circuit board includes a fixed plate and a main plate, the fixed plate and the main plate are bendable and connected, the fixed plate is plugged into the edge of the first flexible circuit board, and the main plate is bent and attached to the copper layer.

[0012] In one embodiment, it further includes a protective film layer, and the protective film layer covers the second flexible circuit board.

[0013] In one embodiment, the first flexible circuit board is a TFT FPC.

[0014] In one embodiment, the second flexible circuit board is a TP FPC.

[0015] Compared with the prior art, the utility model has at least the following advantages:

[0016] The small-volume backlight module of the utility model is provided with a first flexible circuit board, a second flexible circuit board and a backlight assembly. The first flexible circuit board is provided with a first component area and a second component area, a gap is left between the first component area and the second component area, the gap is used to avoid the second flexible circuit board, reduce the size and save the raw materials of the second flexible circuit board, the gap is covered with a grounded copper layer, the second flexible circuit board is provided with a third component area, the third component area is arranged on the copper layer of the gap, and the ground wire of the third component area is electrically connected to the copper layer, thereby shortening the length of the second flexible circuit board, saving materials and having a compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0018] Figure 1 This is a schematic structural diagram of a small-volume backlight module in one embodiment of the utility model;

[0019] Figure 2 This is a schematic structural diagram of a small-volume backlight module in one embodiment of the utility model;

[0020] Figure 3 It is a structural schematic diagram of a small-volume backlight module in one embodiment of the utility model.

[0021] Reference numerals:

[0022] The first flexible circuit board 10 , the first component area 11 , the second component area 12 , the copper layer 13 , the second flexible circuit board 20 , the third component area 21 , the fixing board 22 , the main board 23 , the backlight assembly 30 , and the protective film layer 40 . DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0024] A backlight module, see Figure 1 and Figure 2 , including: a first flexible circuit board 10, a second flexible circuit board 20 and a backlight assembly 30. One side of the first flexible circuit board 10 is arranged on the backlight assembly 30, and the other side is provided with a first component area 11 and a second component area 12, and a gap is left between the first component area 11 and the second component area 12, and the gap is used to avoid the second flexible circuit board 20, reduce the size and save the raw materials of the second flexible circuit board 20. The gap is covered with a grounded copper layer 13. One end of the second flexible circuit board 20 is plugged into the first flexible circuit board 10, and the second flexible circuit board 20 is provided with a third component area 21, and the third component area 21 is arranged on the copper layer 13 in the gap, and the ground wire of the third component area 21 is electrically connected to the copper layer 13, thereby shortening the length of the second flexible circuit board 20, saving materials, and having a compact structure. Preferably, the first flexible circuit board 10 is a TFT FPC, and the second flexible circuit board 20 is a TP FPC.

[0025] In one embodiment, the second flexible circuit board 20 is a flexible circuit board, and a conductive reinforcing sheet is provided between the second flexible circuit board 20 and the copper layer 13 to provide support for the components of the third component area 21. Preferably, the conductive reinforcing sheet is a steel sheet. Among them, the steel sheet is provided with a conductive double-sided adhesive on the side away from the second flexible circuit board 20, that is, the second flexible circuit board 20 is grounded to the copper layer 13 through the steel sheet and the conductive double-sided adhesive in sequence, so that the first flexible circuit board 10 and the second flexible circuit board 20 are grounded together, thereby improving the anti-interference ability of the second flexible circuit board 20.

[0026] In one embodiment, the third component area 21 is provided with a PI window on one side of the conductive reinforcing sheet, and a copper foil connected to the ground wire of the second flexible circuit board 20 is provided in the PI window, and the copper foil abuts against the conductive reinforcing sheet, thereby making the copper foil and the conductive reinforcing sheet electrically connected, thereby fixing the second flexible circuit board 20 on the copper layer 13. In addition, the first component area 11 and the second component area 12 bypass the copper layer 13 to share the ground, so as to avoid the third component area 21 and the copper layer 13.

[0027] See also Figure 2 In order to reduce the peripheral size of the electronic device, the second flexible circuit board 20 includes a fixed board 22 and a main board 23, the fixed board 22 and the main board 23 can be folded and connected, and the third component area 21 is set on the fixed board 22. The fixed board 22 is plugged into the edge of the first flexible circuit board 10, and the main board 23 is folded and attached to the copper layer 13 to reduce the length. In addition, please refer to Figure 3The backlight module further includes a protective film layer 40 , which covers the second flexible circuit board 20 to improve the anti-interference ability of the second flexible circuit board 20 and enhance reliability.

[0028] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A small-volume backlight module, characterized in that: include: A first flexible circuit board, a second flexible circuit board and a backlight assembly; The first flexible circuit board and the second flexible circuit board are respectively arranged on the backlight assembly, and a first component area and a second component area are arranged on the first flexible circuit board, a gap is left between the first component area and the second component area, and the gap is covered with a grounded copper layer; the second flexible circuit board is provided with a third component area, and the third component area is arranged on the copper layer in the gap, and the ground wire of the third component area is electrically connected to the copper layer.

2. The small-volume backlight module according to claim 1, characterized in that: The second flexible circuit board is provided with a conductive reinforcement sheet on the opposite side of the third component area.

3. The small-volume backlight module according to claim 2, characterized in that: The conductive reinforcing sheet is a steel sheet.

4. The small-volume backlight module according to claim 3, characterized in that: A conductive double-sided adhesive is provided on a side of the steel sheet away from the second flexible circuit board.

5. The small-volume backlight module according to claim 4, characterized in that: The third component area is provided with a PI window on one side of the conductive reinforcing sheet. The PI window is provided with a grounded copper foil, and the copper foil is electrically connected to the conductive reinforcing sheet.

6. The small-volume backlight module according to claim 1, characterized in that: The first component area and the second component area bypass the copper layer and share a common ground.

7. The small-volume backlight module according to claim 1, characterized in that: The second flexible circuit board includes a fixed board and a main board, the fixed board and the main board can be bent and connected, the fixed board is plugged into the edge of the first flexible circuit board, and the main board is bent and attached to the copper layer.

8. The small-volume backlight module according to claim 1, characterized in that: It also includes a protective film layer, which covers the second flexible circuit board.

9. The small-volume backlight module according to claim 1, characterized in that: The first flexible circuit board is a TFT FPC.

10. The small-volume backlight module according to claim 1, characterized in that: The second flexible circuit board is a TP FPC.

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