Backlight module with PCB (Printed Circuit Board) positioning function and display equipment

Abstract

The utility model provides a backlight module with PCB (printed circuit board) positioning and display equipment, and the backlight module with PCB positioning comprises a backlight rear frame and a PCB, a positioning boss is arranged on the back face of the backlight rear frame. The PCB comprises a PCB main body and a grounding hole; and the positioning boss corresponds to the grounding hole in position up and down, and when the PCB is assembled on the backlight rear frame, the lower part of the grounding hole is aligned with the positioning boss to be put in, so that the positioning assembly of the PCB is realized. Through the correspondence of the positioning boss and the grounding hole, the positioning assembly of the PCB can be realized, the traditional positioning scribing step does not need to be added, the displacement of the PCB on a plane is avoided, after the PCB is assembled with the shell, the PCB is limited between the backlight rear frame and the shell, the displacement in other directions is also avoided, and the reliability of the PCB is improved. Therefore, the PCB can be fixed without using a double-sided adhesive structure, the cost is saved, and the quality problem caused by easy failure of double-sided adhesive aging and the like is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of display screens, and in particular to a backlight module with PCB positioning and a display device. Background Art

[0002] In the existing vehicle-mounted backlight design, the PCB board of the backlight module is usually fixed on the backlight rear frame by double-sided adhesive. It is also necessary to mark and locate the PCB board on the backlight rear frame so as to align and paste the PCB board. The PCB board is not easy to remove, which not only increases the steps and cost of pasting double-sided adhesive tape. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a backlight module and a display device with PCB positioning.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In a first aspect, an embodiment of the utility model provides a backlight module with PCB positioning, comprising: a backlight rear frame and a PCB board;

[0006] A positioning boss is provided on the back of the backlight rear frame;

[0007] The PCB board includes a PCB body and a grounding hole;

[0008] The positions of the positioning boss and the grounding hole correspond to each other up and down. When the PCB board is assembled on the backlight rear frame, the lower part of the grounding hole is aligned with the positioning boss and inserted into the PCB board to realize the positioning and assembly of the PCB board.

[0009] As a preferred embodiment of the present invention, the top of the positioning boss is frosted.

[0010] As a preferred embodiment of the utility model, it also includes a solder layer, which is arranged above the grounding hole and bonded to the positioning boss.

[0011] As a preferred implementation of the present utility model, the backlight rear frame is a metal frame.

[0012] As a preferred implementation mode of the present invention, the number of the positioning bosses and the number of the grounding holes are both four, and the positions of the positioning bosses and the grounding holes correspond one to one up and down.

[0013] As a preferred embodiment of the present utility model, the positioning boss includes a base and a positioning column.

[0014] As a preferred implementation of the present invention, the diameter of the base is greater than the diameter of the grounding hole.

[0015] As a preferred implementation of the present invention, the diameter of the positioning column is smaller than the diameter of the grounding hole.

[0016] As a preferred implementation of the present invention, the height of the positioning column is equal to the thickness of the PCB board.

[0017] In a second aspect, the present invention further provides a display device, including a display screen and a backlight module with PCB positioning as in any embodiment of the present invention.

[0018] Compared with the prior art, the advantages and positive effects of the utility model are:

[0019] 1. By providing a positioning boss on the back of the backlight rear frame, and the positioning boss corresponds to the position of the grounding hole of the PCB board, when the PCB board is assembled on the backlight rear frame, the lower part of the grounding hole is aligned with the positioning boss and inserted, so that the positioning assembly of the PCB board can be achieved. This structure can be integrally formed with the backlight rear frame, and there is no need to add the traditional positioning and marking steps;

[0020] 2. After the backlight module and the housing are assembled in the embodiment of the utility model, the PCB board is limited between the backlight rear frame and the housing, which not only avoids the movement of the PCB board in the plane direction through the positioning boss, but also avoids displacement in other directions. Therefore, the PCB board can be fixed without using a double-sided adhesive structure, which not only saves costs but also avoids quality problems caused by aging and other easy failures of the double-sided adhesive.

[0021] 3. By bonding the solder layer arranged above the grounding hole to the positioning boss, the PCB board can be fixed, the PCB board can be limited and prevented from moving. At the same time, when the positioning boss and the backlight rear frame are made of metal, the PCB board can also be grounded. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the exploded structure of a backlight module with PCB positioning provided by the utility model;

[0023] Figure 2 A schematic diagram of the assembly structure of a backlight module with PCB positioning provided by the utility model;

[0024] Figure 3 The present invention is a schematic structural diagram of a positioning boss provided by the utility model. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0027] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] First, see Figure 1-2 , the embodiment of the utility model provides a backlight module with PCB positioning, including: a backlight rear frame 100 and a PCB board 200;

[0030] The back side of the backlight rear frame 100 is provided with a positioning boss 110;

[0031] The PCB board 200 includes a PCB body 210 and a grounding hole 220;

[0032] The positioning boss 110 corresponds to the grounding hole 220 in upper and lower positions. When the PCB board 200 is assembled on the backlight rear frame 100 , the lower side of the grounding hole 220 is aligned with the positioning boss 110 to achieve the positioning and assembly of the PCB board 200 .

[0033] By providing a positioning boss on the back side of the backlight rear frame, and the positioning boss corresponds to the position of the grounding hole of the PCB board in the upper and lower sides, when the PCB board is assembled on the backlight rear frame, the lower side of the grounding hole is aligned with the positioning boss and inserted, so that the positioning and assembly of the PCB board can be achieved. This structure can be integrally formed with the backlight rear frame, and there is no need to add the traditional positioning and marking steps; it also avoids the displacement of the PCB board on the plane. After being assembled with the shell, the PCB board is limited between the backlight rear frame and the shell, and displacement in other directions is also avoided. Therefore, the PCB board can be fixed without using a double-sided adhesive structure, which not only saves costs, but also avoids quality problems caused by the aging and easy failure of the double-sided adhesive.

[0034] As a preferred embodiment of the present invention, the top of the positioning boss 110 is frosted. The frosted top not only increases the friction between the PCB and the PCB, making it more difficult for the PCB to move, but also increases the adhesion between the solder layer and the positioning boss when the solder layer 300 is set, making it difficult for the two to fall off.

[0035] As a preferred embodiment of the present invention, please refer to Figure 1-2 , further comprising a solder layer 300, the solder layer 300 being arranged above the grounding hole 220 and bonded to the positioning boss 110. By bonding the solder layer arranged above the grounding hole to the positioning boss, the PCB board can be fixed, the PCB board can be limited and prevented from moving, and when the positioning boss and the backlight rear frame are made of metal, the PCB board can also be grounded.

[0036] As a preferred embodiment of the present invention, the backlight rear frame 100 is a metal frame. When the positioning boss and the backlight rear frame are made of metal, the grounding hole includes a copper foil layer, which can ground the PCB board.

[0037] As a preferred embodiment of the present invention, please refer to Figure 1 The number of the positioning bosses 110 and the grounding holes 220 is four, and the positions of the positioning bosses 110 and the grounding holes 220 correspond one to another. The positioning bosses can be arranged at the four corners of the backlight rear frame, and the grounding holes can also be arranged at the four corners of the PCB board. The above arrangement makes the positioning and fixing effect of the PCB board better.

[0038] As a preferred embodiment of the present invention, please refer to Figure 3 The positioning boss 110 includes a base 111 and a positioning column 112 .

[0039] As a preferred embodiment of the present invention, the diameter of the base 111 is greater than the diameter of the grounding hole 220. The above arrangement allows a gap with the same thickness as the base to be left between the PCB body and the backlight rear frame, thereby preventing the PCB body and the backlight rear frame from being too close to each other, affecting the heat dissipation of the PCB board, and preventing the circuit components on the PCB body from being damaged by collision.

[0040] As a preferred embodiment of the present invention, the diameter of the positioning column 112 is smaller than the diameter of the grounding hole 220 , so that the positioning column 112 can be placed in the grounding hole 220 .

[0041] As a preferred embodiment of the present invention, the height of the positioning column 112 is the thickness of the PCB board 200. The height of the positioning column 112 can also be slightly smaller than the thickness of the PCB board 200. This setting not only ensures the flatness of the PCB board, but also facilitates the setting of the solder layer.

[0042] In a second aspect, the present invention further provides a display device, including a display screen and a backlight module with PCB positioning as in any embodiment of the present invention.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A backlight module with PCB positioning, characterized in that: include: Backlight rear frame and PCB board; A positioning boss is provided on the back of the backlight rear frame; The PCB board includes a PCB body and a grounding hole; The positioning boss corresponds to the grounding hole in upper and lower positions. When the PCB is assembled on the backlight rear frame, the lower side of the grounding hole is aligned with the positioning boss and inserted into the grounding hole to achieve the positioning and assembly of the PCB.

2. The backlight module with PCB positioning according to claim 1, characterized in that: The top of the positioning boss is frosted.

3. The backlight module with PCB positioning according to claim 1, characterized in that: It also includes a solder layer, which is arranged above the grounding hole and bonded to the positioning boss.

4. The backlight module with PCB positioning according to claim 1, characterized in that: The backlight rear frame is a metal frame.

5. The backlight module with PCB positioning according to claim 1, characterized in that: The number of the positioning bosses and the number of the grounding holes are both four, and the positions of the positioning bosses and the grounding holes correspond one to one up and down.

6. The backlight module with PCB positioning according to claim 1, characterized in that: The positioning boss includes a base and a positioning column.

7. The backlight module with PCB positioning according to claim 6, characterized in that: The diameter of the base is greater than the diameter of the grounding hole.

8. The backlight module with PCB positioning according to claim 7, characterized in that: The diameter of the positioning column is smaller than the diameter of the grounding hole.

9. The backlight module with PCB positioning according to claim 8, characterized in that: The height of the positioning column is equal to the thickness of the PCB board.

10. A display device, characterized in that: It comprises a display screen and a backlight module with PCB positioning as described in any one of claims 1 to 9.

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