Backlight FPC bending position structure capable of reducing circuit fracture risk

Abstract

The utility model discloses a backlight FPC bending position structure capable of reducing circuit fracture risk, and relates to the technical field of electronic equipment manufacturing, the backlight FPC bending position structure capable of reducing circuit fracture risk comprises a connecting circuit 1 and a bonding pad 1, the connecting circuit 1 below the bonding pad 1 at the FPC bending position is no longer protruded, and the bonding pad 1 is not protruded. In the new design, a first connecting circuit below a first bonding pad at the bending position of the FPC is not subjected to protruding design any more, the connecting circuit passes through the left side and the right side of the bonding pad and the upper side of the bonding pad, a new connecting path is formed, the circuit layout is changed through the design of the new scheme, it is avoided that a protruding part is formed in the bending process to generate extra thrust on the FPC, and in principle, by re-planning the connecting path, the bending efficiency of the FPC is improved. The stress of the circuit in the bending process is more uniform and reasonable, local stress concentration is reduced, the risk that the circuit at the bending position of the back face of the FPC is broken due to the long-term stress effect is greatly reduced, and the mechanical reliability of the FPC is improved.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment manufacturing technology, and in particular to a backlight FPC bending structure that can reduce the risk of circuit breakage. Background Technology

[0002] Liquid crystal displays (TLCMs) play a vital role in modern electronic devices and are widely used in smartphones, tablets, monitors, televisions, and many other fields.

[0003] In practical applications of TLCM, multiple key components work together to achieve good display results:

[0004] 1. The light guide plate is responsible for distributing light evenly across the entire screen, ensuring consistent brightness;

[0005] 2. The reflector is used to reflect unused light back to the light guide plate, thereby improving light utilization.

[0006] 3. The light-blocking adhesive serves to prevent light leakage and ensure the contrast of the displayed image;

[0007] 4. Brightness enhancers (top and bottom) can increase the intensity of light, making the display clearer and brighter;

[0008] 5. The plastic frame and iron frame provide structural support for the entire backlight module and protect the internal components.

[0009] Currently, to meet the market's ever-increasing demands for thinner, lighter, brighter, and higher-resolution LCD displays, manufacturers have adopted various technologies and processes in the design and manufacturing of BLU FPCs. For example, in material selection, high-performance flexible substrates are used to improve the FPC's flexibility and bending resistance; in circuit fabrication, fine wiring technology is employed to achieve a high-density circuit layout, meeting the signal transmission needs of more functions; and in connection methods, welding processes are continuously optimized to ensure a strong and reliable connection between the pads and the circuitry.

[0010] However, existing BLU FPC designs still have some problems during long-term use. Particularly at FPC bends, due to the protruding structure of the front-side traces below the pads in traditional designs, when the FPC is bent, the protruding traces continuously exert a pushing force on the bent FPC. In the short term, this effect may not be noticeable, but over time and with changes in the operating environment, such as temperature fluctuations, humidity changes, and frequent bending operations, the continuous pushing force causes excessive stress on the traces at the bend on the back of the FPC. This stress concentration gradually causes fatigue damage to the trace material, eventually leading to trace breakage. Once the trace breaks at the FPC bend, it will directly affect the power supply and signal transmission of the LED strip. This can cause LEDs to fail to emit light, leading to the failure of the entire TLCM, severely impacting product lifespan and reliability, increasing maintenance and user costs, and reducing user experience. To address this issue, this application proposes a backlight FPC bending structure that reduces the risk of circuit breakage. By optimizing the design of the front-side wiring below the pads at the FPC bending point, eliminating protrusion, and directing the connecting wiring through the left, right, and top of the pads, the stress on the FPC during bending is effectively improved, reducing the risk of circuit breakage, enhancing product stability and durability, and providing a more reliable solution for the LCD industry. Utility Model Content

[0011] To address the shortcomings of existing technologies, this invention provides a backlight FPC bending structure that reduces the risk of circuit breakage. It solves the problem in traditional designs where the protruding structure of the front circuit below the pads exerts a continuous pushing force on the bent FPC after it is bent.

[0012] To achieve the above objectives, this utility model provides the following technical solution:

[0013] A new backlight FPC bending structure to reduce the risk of circuit breakage. The original design included a second connecting line, a protruding line, and a second pad. The second connecting line was located below the second pad on the front of the FPC. The second connecting line was connected by multiple lines to ensure a stable electrical connection between the second pad and the main circuit. After bending, the second connecting line formed a protruding line below it. The new design includes a first connecting line and a first pad. The first connecting line below the first pad at the FPC bending point is no longer designed as a protruding line. The second connecting line is to compensate for the connection path between the pad and the main circuit.

[0014] Preferably, the second connecting line is connected to the main line through at least three paths, and the protruding line continuously applies a thrust to the bent FPC when the FPC is bent.

[0015] Preferably, the second connection line is connected to the first pad at one end and to the main circuit at the other end, and together with other possible connection lines, it realizes the transmission of signals and power. The first connection line passes through the first pad from the left, right and above to form a new connection path.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the new design, the connection line below the first pad at the FPC bend is no longer designed to protrude. Instead, the connection line passes through the left, right, and top of the pad, forming a new connection path. In the original design, there were two longer lines below the second pad on the front of the FPC. These lines compensate for the connection path between the pad and the main circuit (FPC design requires at least three paths to connect the pad and the main circuit). The enlarged design of the front circuit at the bend is shown below. Figure 3 In this design, when the FPC is bent, the protruding traces below the second pad will continuously exert a pushing force on the bent FPC. This has no effect on the FPC in the short term, but over time, it can cause damage to the traces at the bend on the back of the FPC. Figure 4 The new design addresses the risk of breakage by altering the circuit layout, preventing the formation of protruding parts that exert additional thrust on the FPC during bending. In principle, by replanning the connection path, the stress on the circuit during bending is made more uniform and reasonable, reducing local stress concentration and significantly lowering the risk of circuit breakage at the bending point on the back of the FPC due to long-term stress, thus improving the mechanical reliability of the FPC. Attached Figure Description

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a front view of the new design bending area of ​​this utility model.

[0020] Figure 2 This is a front view of the original design FPC of this utility model;

[0021] Figure 3 This is a front view of the original design of the bending area of ​​this utility model.

[0022] Figure 4 This is a diagram of the circuit structure on the back of the bend in the original design of this utility model.

[0023] Legend: 1. Connection line one; 2. Pad one; 3. Connection line two; 4. Protruding line; 5. Pad two. Detailed Implementation

[0024] This application provides a backlight FPC bending structure that reduces the risk of circuit breakage. It effectively solves the problem of the protruding front circuit below the pads in traditional designs. When the FPC is bent, the protruding circuit continuously exerts a pushing force on the bent FPC. This solution optimizes the design of the front circuit below the pads at the FPC bending point, eliminating the protruding design and allowing the connecting circuit to pass through the left, right, and top of the pads. This effectively improves the stress on the FPC during bending, reduces the risk of circuit breakage, and enhances the stability and durability of the product, providing a more reliable solution for the LCD display industry.

[0025] Example

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this application embodiment effectively solves the problem, and the overall idea is as follows:

[0027] To address the problems existing in the prior art, this utility model provides a backlight FPC bending structure that can reduce the risk of circuit breakage. The original design includes a second connecting line 3, a protruding line 4, and a second pad 5. The second connecting line 3 is located below the second pad 5 on the front of the FPC. The second connecting line 3 ensures a stable electrical connection between the second pad 5 and the main circuit through multiple connections. After bending, the second connecting line 3 forms a protruding line 4 below it. The second connecting line 3 is a compensation path between the pad and the main circuit. The second connecting line 3 is connected to the main circuit through at least three paths. The protruding line 4 continuously applies a pushing force to the bent FPC during the bending process. One end of the second connecting line 3 is connected to the first pad 2, and the other end is connected to the main circuit. Together with other possible connecting lines, it realizes the transmission of signals and power. In the original design, there are two longer lines below the second pad 5 on the front of the FPC. These lines are compensation paths between the pad and the main circuit (the FPC design requires at least three paths to connect the pad and the main circuit). The enlarged design of the front circuit at the bending position is shown below. Figure 3 In this design, when the FPC is bent, the protruding trace 4 below pad 25 will continuously exert a pushing force on the bent FPC. This has no effect on the FPC in the short term, but over time, it may cause damage to the traces at the bend on the back of the FPC. Figure 4 The risk of breakage.

[0028] The new design includes a connecting line 1 and a pad 2. The connecting line 1 below the pad 2 at the FPC bend is no longer designed to protrude. The connecting line 1 passes through the left, right and top of the pad 2 to form a new connection path. The new design changes the circuit layout and avoids the protruding part that would generate additional thrust on the FPC during bending. In principle, by replanning the connection path, the stress on the circuit during bending is more even and reasonable, reducing local stress concentration and greatly reducing the risk of circuit breakage at the back of the FPC due to long-term stress, thus improving the mechanical reliability of the FPC.

[0029] Working principle:

[0030] In the new design, the connection line 1 below pad 2 at the FPC bend is no longer protruding. Instead, the connection line passes through the left, right, and top of the pad, forming a new connection path. In the original design, there were two longer lines below pad 5 on the front of the FPC. These lines compensate for the connection path between the pad and the main circuitry (FPC design requires at least three paths connecting the pad and the main circuitry). The enlarged design of the front circuitry at the bend is shown below. Figure 3 In this design, when the FPC is bent, the protruding trace 4 below pad 25 will continuously exert a pushing force on the bent FPC. This has no effect on the FPC in the short term, but over time, it may cause damage to the traces at the bend on the back of the FPC. Figure 4 The new design addresses the risk of breakage by altering the circuit layout, preventing the formation of protruding parts that exert additional thrust on the FPC during bending. In principle, by replanning the connection path, the stress on the circuit during bending is made more uniform and reasonable, reducing local stress concentration and significantly lowering the risk of circuit breakage at the bending point on the back of the FPC due to long-term stress, thus improving the mechanical reliability of the FPC.

[0031] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A backlight FPC bending structure capable of reducing the risk of line breakage, the original design scheme comprising a connecting line (2), a protruding line (3) and a solder pad (4), characterized in that, The second connecting line (3) is located below the second (5) of the FPC front line. The second connecting line (3) is connected by multiple lines to ensure the stable electrical connection between the second (5) and the main line. After the second connecting line (3) is bent, a protruding line (4) is formed below it. The new design includes a connecting line 1 (1) and a pad 1 (2). The connecting line 1 (1) below the pad 1 (2) at the FPC bend is no longer designed to protrude.

2. The backlight FPC bending structure capable of reducing the risk of line breakage according to claim 1, wherein: The second connection line (3) is the connection path between the compensation pad and the main circuit.

3. The backlight FPC bending structure capable of reducing the risk of line breakage according to claim 1, wherein: The second connecting line (3) is connected to the main line through at least three paths.

4. The backlight FPC bending structure capable of reducing the risk of line breakage according to claim 1, wherein: The protruding line (4) will continuously apply a thrust to the bent FPC while the FPC is bent.

5. The backlight FPC bending structure capable of reducing the risk of line breakage according to claim 1, wherein: The second connection line (3) is connected to the first pad (2) at one end and to the main circuit at the other end, and together with other possible connection lines, it realizes the transmission of signals and power.

6. The backlight FPC bending structure capable of reducing the risk of line breakage according to claim 1, wherein: The connection line (1) passes through the left, right and above the pad (2) to form a new connection path.

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