FPC (Flexible Printed Circuit) design structure for solving wrinkles

Abstract

The utility model discloses an FPC design structure for solving wrinkles, which comprises an FPC, lamp glue and an LGP, the FPC and the LGP are bonded together through the lamp glue, the FPC comprises a copper foil and a gap, and the width direction of the gap and the contraction direction of the LGP are arranged in a crossed manner; according to the utility model, the gap of the FPC and the shrinkage direction of the LGP are arranged in a staggered manner, so that wrinkles at the gap position are effectively inhibited, and the performance and the qualified rate of products are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight source manufacturing, in particular to an FPC design structure for solving wrinkles. Background Art

[0002] Backlight is a light source located behind the liquid crystal display (LCD). Its luminous effect directly affects the visual effect of the liquid crystal display module (LCM). Figure 1 As shown, it includes FPC 1 (flexible printed circuit board), light glue 2 and LGP 3 (light guide plate). The existing solution is that FPC 1 and LGP 3 are bonded together by light glue 2. Figure 2 As shown, the circuit in FPC 1 has copper foil 4 and gap 5. Copper foil 4 is conductive and used for circuit conduction; gap 5 is non-copper foil, mainly to prevent conductivity. LGP 3 is made of acrylic material, while FPC 2 is copper foil. Therefore, LGP 3 shrinks more than FPC 1. The two are bonded by double-sided tape 2. During the experiment, LGP 3 causes FPC 2 to shrink. Since the direction of gap 5 in FPC 2 is the same as the contraction direction of LGP, wrinkles will be generated at gap 5, affecting product performance. Utility Model Content

[0003] The utility model aims to provide an FPC design structure for solving wrinkles.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A wrinkle-reducing FPC design structure includes an FPC, light-sensitive adhesive, and light-sensitive adhesive (LGP). The FPC and LGP are bonded together by the light-sensitive adhesive. The FPC includes copper foil and a gap. The width direction of the gap is arranged to intersect with the contraction direction of the LGP. The LGP primarily contracts along its length. Its length is larger and is more affected by temperature, resulting in a greater shrinkage.

[0006] Furthermore, the angle between the width direction of the gap and the contraction direction of the LGP is 30° to 60°.

[0007] Preferably, the angle between the width direction of the gap and the contraction direction of the LGP is 45°.

[0008] In summary, the present invention has the following beneficial effects: by staggering the gap of the FPC with the shrinkage direction of the LGP, the present invention effectively suppresses wrinkles at the gap position, thereby ensuring the performance and qualified rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the backlight FPC bonding;

[0010] Figure 2 This is a schematic diagram of the prior art backlight FPC structure;

[0011] Figure 3 This is a schematic diagram of the FPC design structure of the backlight source of this utility model.

[0012] In the figure, 1, FPC; 2, light glue; 3, LGP; 4, copper foil; 5, gap. DETAILED DESCRIPTION

[0013] The following is a further detailed description of the present invention in conjunction with the accompanying drawings, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0014] like Figure 1 and 3 As shown, an FPC design structure for solving wrinkles includes FPC1, light glue 2 and LGP3. The FPC1 and LGP3 are bonded together by the light glue 2. The FPC1 includes copper foil 4 and gap 5. The width direction of the gap 5 is arranged to intersect with the shrinkage direction of the LGP3. The shrinkage direction of the LGP3 is mainly its length direction. Its length direction is larger and is more affected by temperature, resulting in a greater shrinkage.

[0015] Furthermore, the angle between the width direction of the gap 5 and the shrinking direction of the LGP3 is 30° to 60°.

[0016] Preferably, the angle between the width direction of the gap 5 and the shrinking direction of the LGP3 is 45°.

[0017] Experimental research has shown that the angle between the width direction of gap 5 and the contraction direction of LGP3 is affected by factors such as the size and thickness of LGP3 and FPC1. Corresponding adjustments are required for different sizes and thicknesses. The optimal adjustment range is between 40° and 50°. Within this range, LGP3 cannot produce wrinkles at the gap 5 position, thereby effectively ensuring product performance.

[0018] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An FPC design structure for solving wrinkles, comprising an FPC (1), a light glue (2) and a light-emitting diode (LGP) (3), wherein the FPC (1) and the light-emitting diode (LGP) (3) are bonded together by the light glue (2). The FPC (1) comprises a copper foil (4) and a gap (5), and is characterized in that: The width direction of the gap (5) is arranged to intersect with the contraction direction of the LGP (3).

2. The wrinkle-reducing FPC design structure according to claim 1, characterized in that: The angle between the width direction of the gap (5) and the contraction direction of the LGP (3) is 30° to 60°.

3. The wrinkle-reducing FPC design structure according to claim 2, characterized in that: The angle between the width direction of the gap (5) and the contraction direction of the LGP (3) is 45°.

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