Flexible circuit board and display device

Abstract

The present invention relates to a flexible circuit board and a display device, and relates to the field of display technology, and is used to improve the problem that the plug-in end of the flexible circuit board in the display device is easily separated from the main control circuit board. The flexible circuit board includes: a circuit board body, having a first edge and a second edge opposite to each other; a first extension connected to the first edge, and the end of the first extension away from the circuit board body is a first binding end; a plug-in extension connected to the second edge, and the end of the plug-in extension away from the circuit board body is a plug-in end; a second extension connected to the first edge, and the end of the second extension away from the circuit board body is a second binding end. The flexible circuit board provided by the present invention is used for the above-mentioned display device.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a flexible circuit board and a display device. Background Art

[0002] Flexible Printed Circuit (FPC) has excellent characteristics such as light weight, thin thickness, and free bending and folding, and is widely used in display devices.

[0003] At present, the display device mainly includes a display panel, a flexible circuit board and a main control circuit board. Among them, the binding end of the flexible circuit board is bound to the binding area of ​​the display panel, and the plug-in end of the flexible circuit board is plugged into the main control circuit board, so that the display device can display images. However, in the existing display device, the plug-in end of the flexible circuit board is easily separated from the main control circuit board, which leads to the problem that the display device cannot display normally. Summary of the invention

[0004] The object of the present invention is to provide a flexible circuit board for improving the problem that a plug-in end of the flexible circuit board is easily separated from a main control circuit board in a display device.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The first aspect of the present invention provides a flexible circuit board, which includes: a circuit board main body, having a first edge and a second edge opposite to each other; a first extension portion connected to the first edge, the end of the first extension portion away from the circuit board main body being a first binding end; a plug-in extension portion connected to the second edge, the end of the plug-in extension portion away from the circuit board main body being a plug-in end; a second extension portion connected to the first edge, the end of the second extension portion away from the circuit board main body being a second binding end; wherein, in a direction parallel to the second edge, the midpoint of a connecting line between the center of the second binding end and the center of the first binding end is located between the center of the plug-in end and the center of the first binding end; or, the center of the first binding end and the center of the second binding end are symmetrical about a line connecting the center of the plug-in end and the midpoint of the connecting line.

[0007] Optionally, an edge of the second extending portion close to the first extending portion is connected to an edge of the first extending portion close to the second extending portion.

[0008] Optionally, a dimension of the second extension portion in a direction parallel to the second edge is greater than or equal to 10 mm and less than or equal to 15 mm.

[0009] Optionally, a ratio between a maximum dimension of the plug-in extension portion in a direction parallel to the second edge and a minimum dimension of the plug-in extension portion in a direction parallel to the second edge is greater than or equal to 1 and less than or equal to 2.

[0010] Optionally, a portion of the plug-in extension portion other than the plug-in end, in a direction parallel to the second edge, gradually decreases in size from an end close to the circuit board body to an end far from the circuit board body.

[0011] Optionally, the plug-in extension portion includes: a first portion, one end of which is connected to the circuit board body and the other end is a plug-in end; the first portion is rectangular.

[0012] Optionally, two opposite edges of the first portion extending from the plug-in end toward the circuit board body are both perpendicular to the second edge.

[0013] Optionally, the plug-in extension portion further includes: a second portion, the second portion is located on one of the two opposite sides of the first portion along a direction parallel to the second edge; the second portion is connected to the edge of the first portion and the second edge.

[0014] Optionally, the plug-in extension further includes: a third portion, the third portion is located on the other of the two opposite sides of the first portion along a direction parallel to the second edge; the third portion is connected to the edge of the first portion and the second edge.

[0015] Optionally, the second portion is triangular in shape; and / or the third portion is triangular in shape.

[0016] Optionally, a component mounting area is provided on the circuit board body; and a distance between a boundary of the component mounting area and the second edge is greater than or equal to 14 mm and less than or equal to 18 mm.

[0017] Optionally, a positioning protrusion is respectively provided on two opposite sides of the plug end along a direction parallel to the second edge.

[0018] Optionally, the flexible circuit board also includes: a first circuit, arranged on one side of the circuit board body; at least one first pin, arranged at the first binding end, and at least one first pin is electrically connected to the first circuit; at least one second pin, arranged at the second binding end; at least one third pin, arranged at the plug-in end, and at least one third pin is electrically connected to the first circuit.

[0019] Optionally, the flexible circuit board further includes: a reinforcing plate, which is arranged on a side of the circuit board body where no circuit elements are arranged.

[0020] Based on the technical solution of the above-mentioned flexible circuit board, the second aspect of the present invention provides a display device, which includes: a display panel, including a first binding pad and a second binding pad; a flexible circuit board like the above-mentioned first aspect, the pin of the first binding end of the flexible circuit board is bound to the first binding pad of the display panel, and the pin of the second binding end of the flexible circuit board is bound to the second binding pad.

[0021] Compared with the prior art, the flexible circuit board and display device provided by the present invention have the following beneficial effects:

[0022] The flexible circuit board provided by the present invention comprises a circuit board body, a first extension part, a second extension part and a plug-in extension part. The circuit board body has a first edge and a second edge opposite to each other, the first extension part is connected to the first edge, and the end of the first extension part away from the circuit board body is a first binding end. The second extension part is connected to the first edge, and the end of the second extension part away from the circuit board body is a second binding end. The plug-in extension part is connected to the second edge, and the end of the plug-in extension part away from the circuit board body is a plug-in end.

[0023] Along the direction parallel to the second edge, the midpoint of the connection line between the center of the second binding end and the center of the first binding end is located between the center of the plug end and the center of the first binding end. In this way, the distance from the center of the plug end to the rotating shaft corresponding to the torque of the plug end can be reduced, thereby reducing the torque of the plug end and improving the problem that the plug end is easily disengaged from the plug interface of the main control circuit board, while not making the size of the second binding end along the direction parallel to the second edge too large, so that the overall structure of the flexible circuit board is compact and reliable.

[0024] The center of the first binding end and the center of the second binding end are symmetrical about the line between the center of the plug end and the midpoint of the connecting line, that is, the distance between the midpoint of the connecting line and the center of the plug end in the direction parallel to the second edge is zero. At this time, the distance from the center of the plug end to the rotating shaft corresponding to the torque of the plug end is zero, that is, the force at the center of the plug end does not generate torque, so that the problem of the plug end easily coming out of the plug interface of the main control circuit board can be better improved.

[0025] It should be noted that the center of the first binding end, the center of the second binding end and the center of the plug-in end all refer to their respective mass centers, that is, the locations of their respective centers of gravity.

[0026] The beneficial effects that can be achieved by the display device provided by the present invention are the same as the beneficial effects that can be achieved by the flexible circuit board provided by the above technical solution, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 A schematic diagram of the structure of a display device provided according to some embodiments of the present invention;

[0029] Figure 2 for Figure 1 A front view of the display device shown;

[0030] Figure 3 for Figure 1 a left side view of the display device shown;

[0031] Figure 4 for Figure 1 A schematic diagram of the structure of a display panel in the display device shown;

[0032] Figure 5 for Figure 1 A schematic diagram of the structure of a main control circuit board in the display device shown;

[0033] Figure 6 A schematic diagram of the structure of a flexible circuit board provided according to some embodiments of the present invention;

[0034] Figure 7 A schematic diagram of the structure of another flexible circuit board provided according to some embodiments of the present invention;

[0035] Figure 8 for Figure 7 A bottom view of the flexible circuit board shown;

[0036] Fig. 9 for Figure 7 a rear view of the flexible circuit board shown;

[0037] Fig.10 for Figure 7 A front view of the flexible circuit board shown;

[0038] Fig.11 A schematic diagram of the structure of another flexible circuit board provided according to some embodiments of the present invention;

[0039] Fig.12 A schematic diagram of the structure of another flexible circuit board provided according to some embodiments of the present invention;

[0040] Fig.13 A schematic diagram of the structure of another flexible circuit board provided according to some embodiments of the present invention;

[0041] Fig.14A schematic diagram of the structure of another flexible circuit board provided according to some embodiments of the present invention;

[0042] Fig.15 A schematic diagram of the structure of another flexible circuit board provided according to some embodiments of the present invention;

[0043] Fig.16 A schematic diagram of the structure of another flexible circuit board provided according to some embodiments of the present invention;

[0044] Fig.17 A schematic diagram of the structure of another display panel provided according to some embodiments of the present invention;

[0045] Fig.18 A schematic diagram of the structure of a display device provided according to some embodiments of the present invention;

[0046] Fig.19 A schematic diagram of the structure of another display device provided according to some embodiments of the present invention;

[0047] Fig. 20 for Fig.19 A schematic diagram of the structure of a display panel in the display device shown;

[0048] Fig.21 A structural schematic diagram of a fixing structure provided according to some embodiments of the present invention;

[0049] Fig. 22 for Fig.21 Bottom view of the fixing structure shown. DETAILED DESCRIPTION

[0050] For ease of understanding, the flexible circuit board and the display device provided by the embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In this article, the display device may be a product or component with a display function, such as an LCD screen, electronic paper, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame or a navigator.

[0053] Figures 1 to 3A display device 02 is shown. The display device 02 includes a display panel 021 , a fixing structure 022 , a main control circuit board 023 and a flexible circuit board 01 .

[0054] See also Figures 1 to 5 , the display panel 021 and the main control circuit board 023 are respectively located on opposite sides of the fixed structure 022, the flexible circuit board 01 has a first binding end 011 and a plug-in end 012, the display panel 021 is provided with a first binding pad 0211, and the main control circuit board 023 is provided with a plug-in interface 0231. The pin of the first binding end 011 is bound to the first binding pad 0211 of the display panel 021, and the plug-in end 012 is plugged into the plug-in interface 0231, so that a control signal can be sent to the display panel 021 through the main control circuit board 023 and the flexible circuit board 01 to control the display panel 021 to display an image.

[0055] Exemplarily, the above-mentioned binding refers to electrically connecting the pin of the first binding end 011 to the first binding pad 0211 of the display panel 021 in a specific manner. For example, an anisotropic conductive film (ACF) is disposed between the pin of the first binding end 011 and the first binding pad 0211 of the display panel 021, and then the pin of the first binding end 011 is fixedly connected to the first binding pad 0211 of the display panel 021 by heat pressing.

[0056] Figures 1 to 3 When the display device 02 is in motion, the plug-in end 012 of the flexible circuit board 01 is easily disengaged from the plug-in interface 0231 on the main control circuit board 023. The inventor of the present disclosure has found that: in the first direction z 1 (The first direction z 1 The plug-in direction z perpendicular to the plug-in end 012 2 ), the distance d between the center of the first binding end 011 and the center of the plug end 012 is large, so the rotation axis L corresponding to the torque from the center of the plug end 012 to the plug end 012 0 The distance D 0 (i.e., D 0 = d2) is also relatively large, and the torque of the plug end 012 is L corresponding to its center to its torque 0 The distance D 0 Therefore, in the above display device, the torque of the plug-in end 012 of the flexible circuit board 1 is relatively large, and the plug-in end 1131 is easily disengaged from the plug-in interface of the main control circuit board.

[0057] See also Figure 6 and Figure 7Some embodiments of the present disclosure provide a flexible circuit board 1 , which includes a circuit board body 110 , a first extending portion 111 , a second extending portion 112 and a plug-in extending portion 113 .

[0058] The circuit board body 110 has opposite first edges a 1 and the second edge a 2 , the first extension portion 111 and the first edge a 1 The end of the first extension portion 111 away from the circuit board body 110 is the first binding end 1111. The second extension portion 112 is connected to the first edge a 1 The end of the second extension portion 112 away from the circuit board body 110 is the second binding end 1121. The plug-in extension portion 113 is connected to the second edge a 2 The end of the plug-in extension portion 113 away from the circuit board body 110 is a plug-in end 1131 .

[0059] Along the second edge a 2 In the direction X, the distance between the plug end 1131 and the first binding end 1111 is greater than zero, and the second binding end 1121 is located on the side of the first binding end 1111 close to the plug end 1131. This design is conducive to reducing the center O of the plug extension part 113 3 The distance from the rotating shaft to the torque of the plug-in extension 113 is as follows: Figure 6 As shown, if the second extension portion 112 is not provided, the rotation axis corresponding to the plug-in extension portion 113 is L 1 (L 1 and parallel to the second edge a 2 The directions X are mutually perpendicular), and the center O of the plug-in extension portion 113 is 3 The torque corresponding to the rotation axis L of the plug-in extension 113 1 The distance is D 1 (D 1 is the center O of the plug-in extension 113 3 The center O of the first binding end 1111 1 Along the second edge a 2 In the case where the second extension portion 112 is provided, the rotation axis corresponding to the plug-in extension portion 113 is L 1 Change to L 2 (L 2 and parallel to the second edge a 2 The directions X are mutually perpendicular), at this time, the center O of the plug-in extension portion 113 3 The distance of the rotation axis corresponding to the torque of the plug-in extension 113 is represented by D 1 Change to D 2 , D 2 Less than D1 The torque of the plug-in extension 113 and its center O 3 The distance from the plug-in extension 113 to the rotating shaft corresponding to its torque is positively correlated, so the torque of the plug-in extension part 113 will be reduced, that is, the torque of the plug-in end 1131 of the plug-in extension part 113 will also be reduced accordingly. In this way, after the flexible circuit board 1 is plugged and connected with the main control circuit board in the display device, the plug-in end 1131 of the plug-in extension part 113 will not be easily detached from the plug-in interface of the main control circuit board.

[0060] It should be noted that the center O of the first binding end 1111 1 and the center O of the plug extension 113 3 All refer to their respective centers of mass, that is, the locations of their respective centers of gravity. In addition, see Figure 6 When the center O of the plug extension 113 is 3 When the direction of the force F at the insertion extension portion 113 is at a certain angle to the plane where the insertion extension portion 113 is located, the force F needs to be decomposed into a force F perpendicular to the plane. 1 and the force F acting parallel to the plane 2 , where the force that generates torque is the force F perpendicular to the plane 1 , that is, the force F 1 It is used to calculate the torque of the plug-in extension. It can be understood that the torque of the plug-in extension 113 corresponds to the rotation axis L 1 Located in the plane where the above-mentioned plug-in extension portion 113 is located.

[0061] In some embodiments, Figure 6 As shown, along the line parallel to the second edge a 2 direction X, the center O of the second binding end 1121 2 The center O of the first binding end 1111 1 The midpoint of the connecting line between 4 , located at the center of the plug end 1131 0 The center O of the first binding end 1111 1 In this way, the center O of the plug end 1131 can be reduced. 0 The distance of the rotating shaft corresponding to the torque of the plug end 1131 is reduced, thereby reducing the torque of the plug end 1131, improving the problem that the plug end 1131 is easily disengaged from the plug interface of the main control circuit board, and preventing the edge of the second binding end 1121 from being parallel to the second edge a 2 The dimension in the direction X is too large, which makes the overall structure of the flexible circuit board 1 compact and reliable.

[0062] In some other embodiments, the center O of the first binding end 1111 1 The center O of the second binding end 1121 2About the center O of the plug end 1131 0 and the midpoint O of the connecting line 4 The connecting line between them is symmetrical, that is, the midpoint O of the connecting line 4 The center O of the plug end 1131 0 Parallel to the second edge a 2 The spacing in the direction X is zero. At this time, the center O of the plug end 1131 0 The distance of the rotating shaft corresponding to the torque of the plug end 1131 is zero, that is, the center O of the plug end 1131 0 The force at the position does not generate torque, thus, the problem that the plug end 1131 is easily disengaged from the plug interface of the main control circuit board can be better improved.

[0063] It should be noted that the center O of the second binding end 1121 2 and the center O of the plug end 1131 0 They all refer to their respective center of mass, that is, the location of their respective center of gravity.

[0064] For example, Figure 6 As shown, the center O of the plug end 1131 0 The center O of the plug extension 113 3 Located on the same axis L 3 On the axis L 3 and parallel to the second edge a 2 The directions X are perpendicular to each other.

[0065] In some embodiments, Figure 7 As shown, the edge of the second extension portion 112 close to the first extension portion 111 is connected to the edge of the first extension portion 111 close to the second extension portion 112. At this time, the first extension portion 111 and the second extension portion 112 are an integrated structure. This design makes the overall structure of the flexible circuit board 1 compact and is conducive to improving the overall structural strength of the flexible circuit board 1, thereby making the flexible circuit board 1 more stable after being connected to the display panel and the main control circuit board in the display device.

[0066] In some embodiments, the second extension portion 112 is parallel to the second edge a. 2 Dimension D in direction X 3 The diameter of the second extension part 112 is greater than or equal to 10 mm and less than or equal to 15 mm. In this way, on the one hand, the second binding end 1121 of the second extension part 112 can be reliably bound to the display panel in the display device, and the second binding end 1121 of the second extension part 112 is not easy to go beyond the display panel. On the other hand, it is helpful to reduce the torque of the plug-in extension part 113 and improve the problem that the plug-in end 1131 is easy to come out of the plug-in interface of the main control circuit board.

[0067] Exemplarily, the second extension portion 112 is parallel to the second edge a 2 Dimension D in direction X 3 The second extension portion 112 is parallel to the second edge a. 2 Dimension D in direction X 3 When the second extension portion 112 is parallel to the second edge a, the overall mass of the flexible circuit board 1 is small, which facilitates the second binding end 1121 of the second extension portion 112 to be on the display panel in the display device, thereby improving the problem that the plug end 1131 is easily disengaged from the plug interface of the main control circuit board. 2 Dimension D in direction X 3 When it is 15 mm or close to 15 mm, the connection portion between the second binding end 1121 of the second extension portion 112 and the display panel can be enlarged, thereby better improving the problem that the plug end 1131 is easily detached from the plug interface of the main control circuit board.

[0068] For example, the first edge a 1 With the second edge a 2 Such a design makes the structure of the flexible circuit board 1 neat, which is beneficial to improving the stability of the flexible circuit board 1 in the display device.

[0069] In some embodiments, Figure 8 As shown, the flexible circuit board 1 also includes a first circuit and at least one second pin 1122. The first circuit is arranged on the circuit board body 110, and the at least one second pin 1122 is arranged at the second binding end 1121 and is not electrically connected to the first circuit. With this design, the second binding end 1121 of the flexible circuit board 1 is only mechanically connected to the display panel in the display device through the at least one second pin 1122, but not electrically connected, that is, the second binding end 1121 is only used to improve the problem that the plug-in end 1131 is easily detached from the plug-in interface of the main control circuit board, and will not affect the original circuit structure of the flexible circuit board 1, thereby facilitating the production of the flexible circuit board 1.

[0070] Exemplarily, the first circuit includes but is not limited to a power supply circuit, a filter circuit, a rectifier circuit, and the like.

[0071] For example, Figure 7 and Figure 8 As shown, a component mounting area 1101 is provided on the circuit board body 110 of the flexible circuit board 1 , and each circuit element in the first circuit, such as inductor, resistor, capacitor, inductor, etc., is arranged in the component mounting area 1101 of the circuit board body 110 .

[0072] In some embodiments, Figure 8 and Fig. 9 As shown, the flexible circuit board 1 also includes at least one first pin 1112 and at least one third pin 1132. The at least one first pin 1112 is arranged at the first binding end 1111, and the at least one first pin 1112 is electrically connected to the first circuit. The at least one third pin 1132 is arranged at the plug end 1131, and the at least one third pin 1132 is electrically connected to the first circuit. With this design, when the first binding end 1111 of the flexible circuit board 1 is bound to the display panel and the plug end 1131 of the flexible circuit board 1 is plugged into the main control circuit board, the main control circuit board can be electrically connected to the display panel, so that the display panel can be controlled to display an image through the main control circuit board.

[0073] In some embodiments, Fig. 9 As shown, the flexible circuit board 1 further includes a reinforcing plate 12, which is disposed on a side of the circuit board body 110 away from the circuit elements, and the orthographic projection of the reinforcing plate 12 on the circuit board body 110 coincides with the circuit board body 110. This design is conducive to improving the structural strength of the circuit board body 110, thereby improving the structural stability of the flexible circuit board 1.

[0074] Exemplarily, the reinforcing plate 12 is a polyimide flexible substrate.

[0075] In some embodiments, see Figure 6 and Figure 7 The circuit board body 110, the first extension part 111, the second extension part 112 and the plug extension part 113 are an integrally formed base substrate 11. Exemplarily, the base substrate 11 is a polyimide flexible substrate.

[0076] In some embodiments, Figure 7 As shown, at least one first fixing hole 1102 is respectively provided on the circuit board body 110 at two opposite sides of the component mounting area 1101. By passing at least one connecting member (such as a screw or a bolt, etc.) through the at least one first fixing hole 1102 and connecting with the fixing structure in the display device, the flexible circuit board 1 can be fixed on the fixing structure, thereby further improving the reliability of the display device and preventing the plug-in end 1131 of the flexible circuit board 1 from being easily disengaged from the plug-in interface of the main control circuit board.

[0077] On this basis, if Fig. 9 As shown, the reinforcing plate 12 is provided with at least one second fixing hole 121 , and the at least one second fixing hole 121 is connected to the at least one first fixing hole 1102 in a one-to-one correspondence.

[0078] Exemplarily, the first fixing hole 1102 is a waist-shaped hole (eg Figure 7As shown), a circular hole or a square hole, the second fixing hole 112 is a waist-shaped hole (as shown Fig. 9 As shown), a circular hole or a square hole. It can be understood that the shapes of the first fixing hole 1102 and the second fixing hole 112 in the present disclosure are various, and only some examples are provided above for illustration.

[0079] In some embodiments, Fig.10 and Fig.11 As shown, the plug extension 113 is parallel to the second edge a 2 The maximum dimension R in the direction X 1 , and the plug-in extension portion 113 is parallel to the second edge a 2 The minimum dimension R in the direction X 2 The ratio between them is greater than or equal to 1 and less than or equal to 2. In this way, the plug-in width (plug-in width is the plug-in end 113 parallel to the second edge a) can be met. 2 The dimension in the direction X is R 2 It can be understood that the plug width is determined by the number of the third pins 1132 on the plug end 1131, that is, the more the number of the third pins 1132, the larger the plug width). At the same time, the plug extension 113 is reduced in parallel with the second edge a. 2 The maximum dimension R in the direction X 1 , which is conducive to reducing the overall mass of the plug extension part 113 when the plug width is constant. The force generated by the plug extension part 113 is positively correlated with the overall mass of the plug extension part 113, and the torque of the plug extension part 113 is positively correlated with the force generated by the plug extension part 113. Therefore, by reducing the overall mass of the plug extension part 113, the torque of the plug extension part 113 can be reduced, that is, the torque of the plug end 1131 will also be reduced accordingly. In this way, after the flexible circuit board 1 is plugged and connected with the main control circuit board in the display device, the plug end 1131 of the plug extension part 113 is not easy to be disengaged from the plug interface of the main control circuit board.

[0080] In this embodiment, it should be noted that the flexible circuit board 1 may include a second extension portion 112, such as Fig.10 The second extension portion 112 may not be included, that is, the flexible circuit board 1 in this embodiment may only include the circuit board body 110, the first extension portion 111 and the plug extension portion 113, as shown. Fig.11 Regardless of whether the above embodiment includes the second extension portion 112, the extension portion 113 can be inserted parallel to the second edge a. 2 The maximum dimension R in the direction X 1 , and the plug-in extension portion 113 is parallel to the second edge a 2 The minimum dimension R in the direction X 2The ratio between them is greater than or equal to 1 and less than or equal to 2, so that the overall mass of the plug-in extension portion is reduced, thereby reducing the torque of the plug-in extension portion 113 and preventing the plug-in end 1131 of the plug-in extension portion 113 from escaping from the plug-in interface of the main control circuit board.

[0081] Here, it should be noted that, in the case where the flexible circuit board 1 does not include the second extension portion 112, see Fig.11 The circuit board body 110, the first extension portion 111 and the plug extension portion 113 are an integrally formed base substrate 11. Exemplarily, the base substrate 11 is a polyimide flexible substrate.

[0082] In some embodiments, Fig.12 As shown, a portion 1133 of the plug-in extension portion 113 other than the plug-in end 1131 extends from an end close to the circuit board body 110 to an end away from the circuit board body 110 in a direction parallel to the second edge a. 2 The size in the direction X gradually decreases. This design facilitates the connection of the circuit element in the component installation area 1101 with the third pin 1132 of the plug end 113 through the conductive wire, and does not require the conductive wire to be bent multiple times to connect the circuit element in the component installation area 1101 with the pin of the plug end 113 due to the complicated shape of the plug extension portion, thereby preventing the conductive wire from breaking during the overall bending process of the flexible circuit board due to excessive bending times or excessive bending angle of the conductive wire.

[0083] In some embodiments, Fig.13 As shown, the plug extension portion 113 includes a first portion 1134, one end of the first portion 1134 is connected to the circuit board body 110, the other end of the first portion 1134 is a plug end 1131, and the first portion 1134 is rectangular, for example, the first portion 1134 extends from an end close to the circuit board body 110 to an end away from the circuit board body 110, parallel to the second edge a 2 The size in the direction X remains unchanged. This design can greatly reduce the overall mass of the plug-in extension part 113, thereby reducing the force generated by the plug-in extension part 113 in the moving state, that is, reducing the torque of the plug-in extension part 113, and the torque of the plug-in end 1131 of the plug-in extension part 113 will also be reduced accordingly. In this way, after the flexible circuit board 1 is plugged and connected with the main control circuit board in the display device, the plug-in end 1131 of the plug-in extension part 113 is not easy to be disengaged from the plug-in interface of the main control circuit board.

[0084] In some embodiments, Fig.13 As shown, the first portion 1134 has two opposite edges (eg, edge a) extending from the plug end 1131 toward the circuit board body 110. 3 ) and the second edge a2 This makes it more stable after the plug-in end 1131 of the flexible circuit board 1 is plugged into the plug-in interface on the main control circuit board of the display device, and it is not easy to fall out of the plug-in interface.

[0085] For example, Figure 7 and Fig.13 As shown, the plugging direction Y of the plugging end 1131 is perpendicular to the second edge a 2 The central axis of the plug end 1131 along the plug direction is L 3 (i.e. through the center of the plug end O 0 The plug-in extension portion 113 is divided into a first area P and a second area P along an axis parallel to the plug-in direction Y. 1 and the second region P 2 The inventors of the present disclosure have found through research that: 1 Center O 31 The force F generated at the position perpendicular to the plane where the plug extension 113 is located 11 With the first area P 1 The quality of the first area P 1 The torque and the first area P 1 Center O 31 The force F generated at the point perpendicular to the plane where the plug extension is located 11 Positive correlation; second area P 2 Center O 32 The force F generated at the point perpendicular to the plane where the plug extension is located 12 With the first area P 2 The quality of the second area P 2 The torque and the second area P 2 Center O 32 The force F generated at the position perpendicular to the plane where the plug extension 113 is located 12 Positive correlation. It should be noted that the first region P 1 Center O 31 and the second region P 2 Center O 32 They all refer to their respective center of mass, that is, the location of their respective center of gravity.

[0086] Based on this, see Fig.13 , along the line parallel to the second edge a 2 Direction X, the midpoint of the connecting line O 4 The center O of the plug end 1131 0 When the spacing between them is zero, the first area P 1 The torque corresponding to the shaft and the second area P 2 The torque corresponding to the shaft is L 3At this time, the plug extension portion 113 only includes the first portion 1134, the first area P 1 and the second region P 2 The area of ​​the first region P 1 and the second region P 2 The masses are equal. In the motion state, the first area P 1 The force at the center and the second area P 2 The forces at the center are also equal, and the first area P 1 Center to axis L 3 The distance to the second area P 2 Center to axis L 3 The distances are equal, so the first area P 1 The torque and the second area P 2 The torques are equal, which can better improve the problem that the plug end 1131 is easily disengaged from the plug interface of the main control circuit board.

[0087] In some embodiments, Fig.14 As shown, the plug extension portion 113 further includes a second portion 1135, and the second portion 1135 is located at the first portion 1134 along a direction parallel to the second edge a. 2 The second portion 1135 is connected to the edge of the first portion 1134 and the second edge a 2 With this design, the conductive wires connecting the circuit elements in the element installation area 1101 and the pins (i.e., the third pins 1132) of the plug-in end 1131 can be arranged on the second portion 1135, so that the conductive wires are not easily bent at too large an angle, and the flexible circuit board 1 is not easily broken during movement.

[0088] For example, Fig.14 As shown, along the line parallel to the second edge a 2 In the direction X, the second portion 1135 is located on a side of the first portion 1134 away from the first extension portion 111 (for example, located in the second area P 2 Far from the first area P 1 side) to facilitate the arrangement of conductive wires.

[0089] On this basis, for example, Fig.14 As shown, the second part 1135 is located at the junction between the first part 1134 and the circuit board body 110, so that the conductive wire can be arranged along the edge of the second part 1135, so that the conductive wire is not easy to appear at right angles, and the conductive wire is not easy to break during the bending process of the flexible circuit board 1.

[0090] For example, Fig.14As shown in FIG. 1 , the second portion 1135 is in a triangular shape, that is, the orthographic projection of the second portion 1135 in a reference plane parallel to the circuit board body is in a triangular shape. At this time, the conductive wire can be parallel to the hypotenuse a of the second portion 1135. 4 The conductive wires are arranged in a direction, which makes it difficult for the conductive wires to have right angles, and the conductive wires are not easy to break when the flexible circuit board 1 is bent. In addition, the second part 1135 in a triangular shape has a stable mechanical effect, thereby improving the stability of the flexible circuit board 1.

[0091] In some embodiments, Fig.15 As shown, the plug extension portion 113 further includes a third portion 1137, and the third portion 1137 is located at the first portion 1134 along a line parallel to the second edge a. 2 The other side of the opposite sides of the direction X (that is, along the direction parallel to the second edge a 2 The third portion 1137 is located on a side of the first portion 1134 close to the first extension portion 111), and the third portion 1137 is connected to an edge of the first portion 1134 and a second edge a 2 In this way, the conductive wires can be arranged along the edge of the third portion 1137, so that the conductive wires are not likely to have right angles, and the conductive wires are not likely to break during the bending process of the flexible circuit board 1.

[0092] For example, Fig.15 As shown, the third part 1137 is in a triangular shape, that is, the orthographic projection of the third part 1137 in a reference plane parallel to the circuit board body is in a triangular shape. At this time, the conductive wire can be arranged in a direction parallel to the hypotenuse of the third part 1137, which makes it difficult for the conductive wire to have a right angle, and the conductive wire is not easy to break when the flexible circuit board 1 is bent. In addition, the triangular-shaped third part 1137 has a stable mechanical effect, thereby improving the stability of the flexible circuit board 1.

[0093] It should be noted that the second part 1135 and the third part 1137 may be provided at the same time, or only one of them may be provided.

[0094] See also Figure 7 and Fig.15 , along the line parallel to the second edge a 2 Direction X, the midpoint of the connecting line O 4 , located at the center of the plug end 1131 0 The center O of the first binding end 1111 1 In the case of between, for example, Fig.15 As shown, only the third part 1137 is provided, that is, the third part 1137 is provided at the midpoint O of the first part 1134 close to the connecting line. 4 At this time, the central axis L3 The dividing line is the midpoint O of the plug-in extension portion 113 close to the connecting line. 4 The mass of the portion is greater than the midpoint O of the plug extension 113 away from the connecting line. 4 The mass of the portion of the plug-in extension 113 close to the midpoint O of the connecting line 4 The force generated by the portion of the plug-in extension 113 is greater than the midpoint O of the connecting line. 4 At the same time, the plug-in extension portion 113 near the midpoint O of the connecting line 4 The center of the part O 31 The torque to this part corresponds to the axis L 2 The distance between the plug extension 113 and the midpoint O of the connection line is less than 4 The center of the part O 32 The torque to this part corresponds to the axis L 2 Therefore, it is beneficial to make the plug extension 113 close to the midpoint O of the connecting line. 4 The torque of the portion of the plug extension 113 away from the midpoint O of the connection line 4 The torques of the parts are equal or close to each other, thereby improving the problem that the plug-in end 1131 of the plug-in extension portion 113 is easily disengaged from the plug-in interface of the main control circuit board.

[0095] For example, Fig.14 and Fig.15 As shown, a positioning protrusion 1136 is respectively provided on two opposite sides of the plug-in end 1131 along a direction parallel to the second edge. Through the positioning protrusion 1136, the plug-in end 1131 can be snapped into the plug-in interface of the main control circuit board, thereby improving the connection reliability.

[0096] In some embodiments, Fig.16 As shown, the boundary of the component mounting area 1101 is adjacent to the second edge a 2 The distance R 3 The design is greater than or equal to 14 mm and less than or equal to 18 mm. With this design, after the area of ​​the plug extension portion 113 is reduced, the conductive wire is easy to connect the circuit components in the component installation area 1101 and the pins of the plug end 1131, and it is not easy for the conductive wire to have a large fold angle due to the wiring area of ​​the component installation area 1101 close to the plug extension portion 113 being too small, so that the conductive wire is not easy to be broken during the bending process of the flexible circuit board 1. For example, the boundary of the component installation area 1101 and the second edge a 2 The distance R 3 The boundary of the component mounting area 1101 and the second edge a 2The distance R 3 When the thickness is equal to or close to 14 mm, the overall mass of the flexible circuit board 1 is small and it is not easy to bend after being installed in the display device; 2 The distance R 3 When the distance between the component mounting area and the second edge a is equal to or close to 18 mm, 2 The distance between them is relatively large, which facilitates the arrangement of conductive wires to connect the circuit components of the component mounting area 1101 with the pins of the plug-in terminal 1131 .

[0097] See also Fig.17 Some embodiments of the present disclosure provide a display panel 2, including a substrate and a second circuit disposed on the substrate, a first binding pad 21, and a second binding pad 22, wherein the first binding pad 21 is electrically connected to the second circuit, and the second binding pad 22 is not electrically connected to the second circuit. In this way, after the at least one second pin 1122 of the second binding end 1121 of the flexible circuit board 1 is bound to the second binding pad 22 of the display panel 2, the at least one second pin 1122 is only mechanically connected to the second binding pad 22, and the at least one second pin 1122 is not electrically connected to the second circuit of the display panel, that is, the second binding pad 22 is only used to fix the second binding end 1121 of the flexible circuit board 1, so as to improve the problem that the plug-in end 1131 is easily disengaged from the plug-in interface of the main control circuit board, and will not affect the original circuit structure of the display panel 2 and the flexible circuit board 1, thereby facilitating the production of the display panel 2 and the flexible circuit board 1.

[0098] In some examples, such as Fig.17 As shown, the display panel 2 includes a liquid crystal module 23 and a backlight source 24. The liquid crystal module 23 is installed in the backlight source 24, and then the liquid crystal module 23 and the backlight source 24 are installed in the cavity of the fixed structure. In other examples, the display panel includes an organic light emitting diode display panel, which has a self-luminous function and does not require a backlight source 24. In this case, the organic light emitting diode display panel can be directly installed in the cavity of the fixed structure 22.

[0099] See also Fig.18 Some embodiments of the present disclosure provide a display device 3, which includes a main control circuit board 31, a display panel 2 as described in any of the above embodiments, and a flexible circuit board 1 as described in any of the above embodiments. The main control circuit board 31 has a plug interface, and the plug end 1131 of the flexible circuit board 1 is plugged into the plug interface. The pin (i.e., the first binding end 1111 of the flexible circuit board 1) Figure 8 The first pin 1112 shown in FIG. 1 is bound to the first binding pad 21 of the display panel 2, and the pin of the second binding end 1121 of the flexible circuit board 1 (ie Figure 8 The second pin 1122 shown in FIG. 1 is bound to the second binding pad 22 of the display panel 2 .

[0100] See also Fig.19 Some embodiments of the present disclosure provide another display device 3, which includes a main control circuit board 31, a display panel 2A, and a flexible circuit board 1 as in any of the above embodiments. The main control circuit board 31 has a plug interface, the display panel 2A includes a first binding pad 21, the plug end 1131 of the flexible circuit board 1 is plugged into the plug interface, and the pin (i.e., the first binding end 1111 of the flexible circuit board 1) Figure 8 The first pin 1112 shown in FIG. 1 is bound to the first binding pad 21 of the display panel 2 .

[0101] For example, Fig.21 As shown, the fixing structure 32 is provided with a mounting cavity 321. Fig.17 The display panel 2 and Fig. 20 The display panels 2A shown can all be installed in the installation cavity 321. It should be noted that there are multiple ways to install the above display panels. For example, an elastic clamping platform is provided on one of the display panel and the fixed structure 32, and an elastic buckle is provided on the other. By pressing, the elastic clamping platform and the elastic buckle are clamped together, so that the display panel is clamped and fixed in the installation cavity 321 of the fixed structure 32. For another example, a double-sided tape is provided between the display panel and the fixed structure 32, and the display panel is fixed in the installation cavity 321 of the fixed structure 32 by bonding with the double-sided tape.

[0102] On this basis, for example, Fig.21 As shown, a sidewall of the mounting cavity 221 is provided with an avoidance groove 322. The avoidance groove 322 is configured to allow the first binding end 1111 of the flexible circuit board 1 to pass through, or the avoidance groove 322 is configured to allow the second binding end 1121 of the flexible circuit board 1 to pass through, or the avoidance groove 322 is configured to allow the first binding end 1111 and the second binding end 1121 of the flexible circuit board 1 to pass through.

[0103] See also Fig.18 and Fig.19 The main control circuit board 31 is disposed on a side of the fixed structure 32 away from the display panel, and the main control circuit board 31 is relatively fixed to the fixed structure 32. It should be noted that there are many ways to relatively fix the main control circuit board 31 to the fixed structure 32, for example, see Fig. 22 , a plurality of first connection holes 324 are provided on the fixing structure 32. At this time, Fig.18 and Fig.19The main control circuit board 31 is shown as being provided with a plurality of second connection holes, which correspond one to one with the plurality of first connection holes 324. A corresponding first connection hole 324 is connected to a second connection hole through a connecting member (such as a screw or a bolt), so that the main control circuit board 31 is relatively fixed to the fixing structure 32. For example, Fig. 22 As shown, the fixing structure 32 is provided with four first connection holes 324, and correspondingly, Fig.18 and Fig.19 Four second connection holes are also provided on the main control circuit board 31 shown, and the four second connection holes are arranged in one-to-one correspondence with the four first connection holes 324 .

[0104] For example, Fig.21 As shown, the fixing structure 32 is further provided with at least one third fixing hole 323, and the at least one third fixing hole 323 is connected to Figure 7 At least one first fixing hole 1102 on the circuit board body 110 shown in the figure corresponds one to one, and the flexible circuit board 1 can be fixed to the fixing structure 32 by passing each connecting member (such as a screw) through a corresponding first fixing hole 1102 and a third fixing hole 323, thereby facilitating further improving the reliability of the above-mentioned display device 3 and making it difficult for the plug-in end 1131 of the flexible circuit board 1 to come out of the plug-in interface of the main control circuit board.

[0105] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0106] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A flexible circuit board, characterized in that: include: a circuit board body having a first edge and a second edge opposite to each other; a first extension portion connected to the first edge, wherein an end of the first extension portion away from the circuit board body is a first binding end; a plug-in extension portion connected to the second edge, wherein an end of the plug-in extension portion away from the circuit board body is a plug-in end; A second extension portion connected to the first edge, wherein the end of the second extension portion away from the circuit board body is a second binding end; an edge of the second extension portion close to the first extension portion is connected to an edge of the first extension portion close to the second extension portion; Wherein, the circuit board body is connected with the first extension part, the second extension part, and the plug-in extension part, and forms an integrated structure; In a direction parallel to the second edge, the midpoint of a connection line between the center of the second binding end and the center of the first binding end is located between the center of the plug end and the center of the first binding end; or, The center of the first binding end and the center of the second binding end are symmetrical about a line between the center of the plug end and the midpoint of the connecting line.

2. The flexible circuit board according to claim 1, characterized in that: A dimension of the second extension portion in a direction parallel to the second edge is greater than or equal to 10 mm and less than or equal to 15 mm.

3. The flexible circuit board according to claim 1 or 2, characterized in that: A ratio between a maximum dimension of the plug-in extension portion in a direction parallel to the second edge and a minimum dimension of the plug-in extension portion in a direction parallel to the second edge is greater than or equal to 1 and less than or equal to 2.

4. The flexible circuit board according to claim 1 or 2, characterized in that: The size of the portion of the plug-in extension portion other than the plug-in end in a direction parallel to the second edge gradually decreases from an end close to the circuit board body to an end far from the circuit board body.

5. The flexible circuit board according to claim 1 or 2, characterized in that: The plug-in extension portion comprises: The first part has one end connected to the circuit board body and the other end being the plug-in end; the first part is rectangular.

6. The flexible circuit board according to claim 5, characterized in that: Two opposite edges of the first portion extending from the plug-in end toward the circuit board body are both perpendicular to the second edge.

7. The flexible circuit board according to claim 5, characterized in that: The plug extension also includes: a second portion, and / or the second portion is located on one of two opposite sides of the first portion in a direction parallel to the second edge; The second portion is connected to an edge of the first portion and the second edge.

8. The flexible circuit board according to claim 7, characterized in that: The plug extension also includes: a third portion located on the other of the two opposite sides of the first portion in a direction parallel to the second edge; The third portion is connected to an edge of the first portion and the second edge.

9. The flexible circuit board according to claim 8, characterized in that: The second portion is in a triangular shape; and / or the third portion is in a triangular shape.

10. The flexible circuit board according to claim 1 or 2, characterized in that: The circuit board body has a component mounting area; the distance between the boundary of the component mounting area and the second edge is greater than or equal to 14 mm and less than or equal to 18 mm.

11. The flexible circuit board according to claim 1 or 2, characterized in that: The flexible circuit board also includes: A first circuit is arranged on one side of the circuit board body; at least one first pin, disposed at the first binding end, and the at least one first pin is electrically connected to the first circuit; at least one second pin, disposed at the second binding end; At least one third pin is disposed at the plug-in end, and the at least one third pin is electrically connected to the first circuit.

12. A display device, characterized in that: include: The display panel includes a first binding pad and a second binding pad; According to any one of claims 1 to 11, the pin of the first binding end of the flexible circuit board is bound to the first binding pad of the display panel, and the pin of the second binding end of the flexible circuit board is bound to the second binding pad.

Images