Circuit structure of small-size screen

Abstract

The utility model discloses a circuit structure of a small-size screen, which comprises a backlight FPC (Flexible Printed Circuit), a plurality of backlight PINs (Personal Identification Number) are arranged at the bottom of the backlight FPC, a backlight bonding pad area is arranged on the back of the backlight FPC, two paths of backlight bonding pads are arranged in the backlight bonding pad area, and the bottoms of the two paths of backlight bonding pads are connected with signal lines for signal transmission. According to the utility model, the backlight bonding pad area adopts a closed design, so that the signal line needs to be wired on the bottom layer, and the copper laid on the upper layer of the backlight bonding pad shields signal interference, so that the signal line is not easy to be interfered, and signal transmission is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of circuit technology for small-sized screens, and more particularly to a circuit structure for small-sized screens. Background Technology

[0002] Backlight circuit design only focuses on the line width and spacing of the backlight lines. However, some structural space on the FPC is too small, which can lead to broken backlight pad lines. Furthermore, the backlight pad area on the FPC has open areas, such as... Figure 1 As shown, the width of the two backlight pads is 0.4. The backlight pads need to be surrounded by GND lines from the edge. If the space cannot be increased, the size of the backlight pads or the distance between the pads needs to be changed. In addition, the backlight pads are routed from above through the window area. The signal is easily interfered with when the signal is routed from above, which is not conducive to signal transmission. Furthermore, when the FPC is received, it needs to be torn off. The window area is easy to break, resulting in poor backlight and affecting the quality of the product. Utility Model Content

[0003] The purpose of this invention is to solve the technical problems existing in the prior art and to provide a circuit structure for a small-sized screen.

[0004] To achieve the above objectives, the technical solution provided by this utility model is: a circuit structure for a small-sized screen, including a backlight FPC, a plurality of backlight pins are provided at the bottom of the backlight FPC, a backlight pad area is provided on the back of the backlight FPC, the backlight pad area includes two backlight pads, the bottom of the two backlight pads are connected to signal lines for signal transmission, the signal lines are routed through the bottom of the backlight pads and connected to the backlight pins of the FPC, and copper is poured on the upper layer of the backlight pads.

[0005] Preferably, the backlight pad area adopts a closed design.

[0006] Preferably, the backlight pad is soldered to the backlight FPC, and an insulating adhesive is provided between the backlight pad and the backlight FPC. The insulating adhesive shall not extend beyond the left side of the backlight pad, and the right side of the insulating adhesive shall not exceed 0.5mm. The total thickness of the backlight FPC, the insulating adhesive and the solder is 0.45mm.

[0007] Preferably, the width of the two backlight pads is 0.35mm, and the spacing between the two backlight pads remains unchanged at 0.8mm.

[0008] The beneficial effects of this utility model are:

[0009] This invention avoids the breakage of backlight pad circuitry by changing the width of the backlight pad to 0.35mm while keeping the spacing the same. Furthermore, the backlight pad area adopts a closed design, which requires the signal lines to be routed through the bottom layer. The copper layer on top of the backlight pad also shields against signal interference, making it less susceptible to interference and facilitating signal transmission. Attached Figure Description

[0010] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0011] Figure 1 This is a schematic diagram of the windowed area within the backlight pad area on an FPC in the prior art;

[0012] Figure 2 This is a front view of the overall structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the back structure of the overall structure of this utility model.

[0014] Attached image captions:

[0015] 1-Backlight FPC, 2-Backlight pad, 3-Backlight pad area. Detailed Implementation

[0016] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] Reference Figures 2-3 In a preferred embodiment of this utility model, a circuit structure for a small-sized screen includes a backlight FPC1. The backlight FPC1 has multiple backlight pins at its bottom and a backlight pad area 3 on its back side. The backlight pad area 3 includes two backlight pads 2. The backlight pad area 3 adopts a closed design. The bottom of the two backlight pads 2 is connected to signal lines for signal transmission. The signal lines are connected to the backlight pins of the FPC through the bottom traces of the backlight pads 2, and the upper layer of the backlight pads 2 is copper-plated.

[0021] Furthermore, the backlight pad 2 is soldered onto the backlight FPC1, and an insulating adhesive is placed between the backlight pad 2 and the backlight FPC1. The insulating adhesive must not extend beyond the left side of the backlight pad 2, and the right side of the insulating adhesive must not exceed 0.5mm. The total thickness of the backlight FPC1, the insulating adhesive, and the solder is 0.45mm.

[0022] Furthermore, the backlight pad 2 needs to be surrounded by a GND line from the edge. If the space cannot be increased, the size of the backlight pad 2 or the distance between the two backlight pads 2 needs to be changed. Therefore, the width of the two backlight pads 2 is changed to 0.35mm, and the distance between the two backlight pads 2 remains unchanged at 0.8mm.

[0023] This invention avoids the breakage of backlight pad circuitry by changing the width of the backlight pad to 0.35mm while keeping the spacing the same. Furthermore, the backlight pad area adopts a closed design, which requires the signal lines to be routed through the bottom layer. The copper layer on top of the backlight pad also shields against signal interference, making it less susceptible to interference and facilitating signal transmission.

[0024] Without causing conflict, those skilled in the art can freely combine and use the above-mentioned additional technical features.

[0025] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. A line structure for a small size screen, characterized by: The backlight FPC (1) is provided with a plurality of backlight PINs at the bottom, and a backlight pad area (3) is arranged on the back of the backlight FPC (1), wherein the backlight pad area (3) comprises two backlight pads (2), the bottom of the two backlight pads (2) is connected with a signal line for signal transmission, the signal line is connected with the backlight PIN of the FPC through the bottom wiring of the backlight pad (2), and the upper layer of the backlight pad (2) is paved with copper.

2. A line structure for a small size screen according to claim 1, characterized in that: The two sides of the backlight pad area (3) adopt a closed design.

3. The line structure of a small size screen according to claim 1, wherein: The backlight pad (2) is welded on the backlight FPC (1) through soldering, and the insulating glue is arranged between the backlight pad (2) and the backlight FPC (1), the insulating glue cannot exceed the left range of the backlight pad (2), the right side of the insulating glue does not exceed 0.5 mm, and the total thickness of the backlight FPC (1), the insulating glue and the soldering is 0.45 mm.

4. The line structure of a small size screen according to claim 1, wherein: The width of the two backlight pads (2) is 0.35 mm, and the interval of the two backlight pads (2) is 0.8 mm.

Images