Liquid crystal display screen FPC (Flexible Printed Circuit) structure used by bending

Abstract

The utility model discloses a liquid crystal display screen FPC (flexible printed circuit) structure used by bending. The liquid crystal display screen FPC structure comprises a display unit, wherein a driving IC (integrated circuit) is arranged on the surface of the display unit; an FPC connected to the display unit through the driving IC; and a decompression groove which is formed on the FPC and is used for improving the bending flexibility of the FPC. According to the liquid crystal display screen FPC structure used in the bending mode, the FPC connected to the display unit is grooved from the middle, the pressure reduction groove is composed of the triangular groove and the rectangular groove, and therefore through the structural design that the triangular groove in the top is internally provided with the right angle, signal lines can be wired from the two sides of the FPC easily; due to the fact that the right angle is close to the glass end, the flexibility of the FPC in the bending process is improved, the overall tension of the FPC in the bending use process is effectively reduced, the situation that the FPC is prone to being separated from the connecting position of the display unit due to the too large tension is reduced, the first chamfer, the second chamfer and the third chamfer are jointly designed in the pressure reduction groove in a matched mode, and therefore the flexibility of the FPC is improved. And the phenomenon that the corner of the FPC is easy to bend and tear is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of FPC, in particular to a FPC structure of a liquid crystal display screen for bending. Background Art

[0002] Flexible circuit boards, also known as "soft boards", are printed circuits made of flexible insulating substrates. Flexible circuits provide excellent electrical properties, can meet the design needs of smaller and higher density installations, and also help reduce assembly processes and enhance reliability. Flexible circuit boards are the only solution to meet the requirements of miniaturization and mobility of electronic products. They can be bent, wound, and folded freely, can withstand millions of dynamic bends without damaging the wires, can be arranged arbitrarily according to the requirements of spatial layout, and can be moved and stretched arbitrarily in three-dimensional space, thereby achieving the integration of component assembly and wire connection.

[0003] At present, conventional liquid crystal display screens are mainly composed of an upper polarizer, an upper glass, a lower glass, a lower polarizer, a driver IC and an FPC. Since the driver IC requires a large number of driving signal pins, the FPC has a certain width. In some cases, when the FPC needs to be bent to the back for use, it is easy to be difficult to bend the FPC or the tension of the FPC after bending is too large, causing the FPC to separate from the glass and fall off. Therefore, a liquid crystal display FPC structure for bending is proposed. Utility Model Content

[0004] Based on this, it is necessary to provide a FPC structure for a liquid crystal display screen that can be bent to address the above technical problems, and to perform local window opening processing on the conventional full-surface FPC so that the middle part of the FPC appears hollow, thereby reducing the tension of the FPC in the bent state.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A FPC structure of a liquid crystal display screen for bending, comprising:

[0007] A display unit, wherein a driving IC is arranged on the surface of the display unit;

[0008] The FPC is connected to the display unit via the driver IC;

[0009] A decompression groove is formed on the FPC to improve the bending flexibility of the FPC.

[0010] Further, the decompression tank comprises a tank body;

[0011] The slot body is composed of a triangular slot and a rectangular slot.

[0012] Furthermore, the top of the triangular groove is set at an angle of 90 degrees, which is used to assist the signal line to be routed from the binding PAD end through both sides of the FPC toward the plug interface end.

[0013] Furthermore, both ends of the bottom of the rectangular groove are formed with a first chamfer, and the top of the triangular groove is formed with a second chamfer.

[0014] Furthermore, a third chamfer is formed at the connection between the triangular groove and the rectangular groove, and the first chamfer, the second chamfer and the third chamfer are used together to prevent tearing at the corners of the FPC.

[0015] Further, the display unit includes an upper polarizer, an upper glass, a lower glass and a lower polarizer;

[0016] The upper polarizer, the upper glass, the lower glass and the lower polarizer are attached in sequence from outside to inside to form the display unit.

[0017] Furthermore, a supporting unit is provided in the rectangular groove to provide lateral support for the FPC when it is bent.

[0018] Further, the support unit includes two groups of support members arranged relatively parallel to each other;

[0019] The support member is composed of two upper and lower insulating support plates arranged opposite to each other, and both ends of the two insulating support plates are provided with overlapping ends for forming an overlap with the FPC;

[0020] Wherein, the opposite sides of the two insulating support plates are coated with double-sided adhesive.

[0021] Furthermore, a fastening groove is provided in the middle of the insulating support plate, and the two groups of support members are fastened together with a positioning element through the fastening groove.

[0022] Further, the positioning element includes an aluminum plate and positioning plates connected to both ends of the aluminum plate;

[0023] The positioning plate is connected to the corresponding support member through a fastening groove.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The FPC structure of the liquid crystal display screen provided by the utility model is used for bending, and the FPC connected to the display unit is grooved from the middle to form a local pressure relief groove, and the pressure relief groove is composed of a triangular groove and a rectangular groove. Therefore, the right-angle structural design in the top triangular groove is not only conducive to routing the signal line from both sides of the FPC, but also improves the softness of the FPC when it is bent because the right angle is close to the glass end, effectively reducing the overall tension of the FPC when it is bent, and reducing the situation that the FPC is easily separated from the connection of the display unit due to excessive tension;

[0026] And the joint design of chamfering one, two and three in the pressure relief groove effectively prevents the FPC from bending and tearing at the corners.

[0027] By adding support units in the decompression groove, the FPC as a whole can be laterally supported on both sides of the bending line when the FPC is bent and assembled, avoiding the situation where the left and right sides of the FPC are uneven and prone to warping after bending, which is conducive to more stable bending and use of the FPC. At the same time, the positioning elements are connected together in the two groups of support units, which can jointly form a firm connection for the support units and enhance the strength of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of the FPC structure of a liquid crystal display screen used for bending provided by the utility model;

[0029] Figure 2 A side view structural diagram of a bent FPC structure of a liquid crystal display provided by the utility model;

[0030] Figure 3 A schematic diagram of the FPC structure of a liquid crystal display screen FPC structure provided by the utility model for bending use;

[0031] Figure 4 A schematic diagram of the FPC wiring structure of the FPC structure of a liquid crystal display screen used for bending provided by the utility model;

[0032] Figure 5 A schematic diagram of the support unit structure of the FPC structure of a liquid crystal display screen used for bending provided by the utility model;

[0033] Figure 6 A schematic diagram of the positioning element structure of the FPC structure of a liquid crystal display screen used for bending provided by the utility model;

[0034] Figure 7 A schematic diagram of the insulating support plate structure of the FPC structure of a liquid crystal display screen used for bending provided by the utility model;

[0035] Figure 8 This is a schematic diagram of the aluminum plate structure of the FPC structure of a liquid crystal display screen used for bending provided by the utility model.

[0036] The markings in the figure are as follows:

[0037] Display unit 1, upper polarizer 11, upper glass 12, lower glass 13, lower polarizer 14, driver IC 15;

[0038] FPC 2;

[0039] Decompression groove 3, groove body 31, triangular groove 32, rectangular groove 33, chamfer 1 34, chamfer 2 35, chamfer 3 36;

[0040] Support unit 4, support member 41, insulating support plate 42, overlap end 43, double-sided adhesive 44, fastening groove 45;

[0041] Positioning element 5 , aluminum plate 51 , positioning plate 52 . DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0043] As mentioned in the background art, conventional FPCs all have a certain width. In some use cases, when the FPC needs to be bent to the back for use, it is easy for the FPC to be difficult to bend or the tension of the FPC after bending is too large, causing the FPC to separate from the glass and fall off.

[0044] In order to solve this technical problem, the utility model provides a liquid crystal display FPC structure for bending, which is applied to the FPC technical field.

[0045] Specifically, please refer to Figure 1-Figure 8 The FPC structure of the LCD screen used for bending specifically includes:

[0046] Display unit 1, a driving IC 15 is arranged on the surface of the display unit;

[0047] FPC2, which is connected to the display unit 1 through the driver IC15;

[0048] The pressure relief groove 3 is formed on the FPC 2 to improve the bending flexibility of the FPC.

[0049] The FPC structure of a liquid crystal display screen used for bending provided by the utility model digs a groove in the middle of the FPC2 connected to the display unit 1 to form a local pressure relief groove 3, which is not only conducive to the routing of signal lines from both sides of the FPC2, but also improves the softness of the FPC2 when bent because the right angle in the pressure relief groove 3 is close to the glass end, effectively reduces the overall tension of the FPC2 when bent, and reduces the situation where the FPC2 is easily separated from the connection of the display unit 1 due to excessive tension.

[0050] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0051] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0053] Example 1

[0054] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a FPC structure of a liquid crystal display screen for bending use includes:

[0055] Display unit 1, on the surface of which a driver IC 15 is arranged; FPC 2, which is connected to the display unit 1 through the driver IC 15; decompression groove 3, which is formed on the FPC 2 to improve the bending flexibility of the FPC;

[0056] The display unit 1 comprises an upper polarizer 11, an upper glass 12, a lower glass 13 and a lower polarizer 14, wherein the upper polarizer 11, the upper glass 12, the lower glass 13 and the lower polarizer 14 are attached in sequence from outside to inside to form the display unit 1;

[0057] like Figure 3 As shown, as a further optimization of this embodiment, the decompression groove 3 includes a groove body 31, wherein the groove body 31 is composed of a triangular groove 32 and a rectangular groove 33;

[0058] Through the design of the rectangular groove 33, FPC2 can be bent along the height direction of the rectangular groove 33 during the actual bending process. Since the opening of the rectangular groove 33 reduces the overall effective area of ​​FPC2, and FPC2 is evenly distributed relative to both sides of the rectangular groove 33, the overall tension after bending and assembly is further reduced, thereby avoiding the situation where FPC2 is easily separated from the display unit 1 due to excessive tension after connection.

[0059] Example 2

[0060] The FPC structure of the bent liquid crystal display provided in Example 1 is further optimized. Specifically, Figure 3 and Figure 4As shown, the top of the triangular groove 32 is set at a ninety-degree angle, which is used to assist the signal line to be routed from the binding PAD end through the two sides of the FPC to the plug interface end;

[0061] The top of the slot body 31 is designed at a right angle, that is, the angle between the left and right sides of the triangular slot 32 is 90 degrees, and the left and right sides are symmetrically arranged about the central axis of FPC2. Through the right-angle design, the drive signal line inside FPC2 can be routed from the binding PAD end through the two sides of FPC2 to the plug interface end (such as Figure 4 At the same time, it can effectively improve the bending flexibility of FPC2 and reduce its overall tension after bending.

[0062] Example 3

[0063] The FPC structure of the LCD screen used for bending provided in Example 1 or 2 is further optimized, such as Figure 3 and Figure 4 As shown, both ends of the bottom of the rectangular groove 33 of the bent LCD FPC structure are formed with chamfers 1 34, and the top of the triangular groove 32 is formed with chamfers 2 35;

[0064] The connection between the triangular groove 32 and the rectangular groove 33 is formed with a third chamfer 36, a first chamfer 34, a second chamfer 35 and a third chamfer 36;

[0065] The above-mentioned chamfer 1 34, chamfer 2 35 and chamfer 36 are jointly arranged to avoid the generation of inner edges at the corners of the edges of the grooves after the triangular grooves 32 and the rectangular grooves 33 are actually grooved, and the inner edges are easy to cause partial tearing when the FPC 2 is bent, thereby facilitating the protection of the entire FPC 2.

[0066] Example 4

[0067] The FPC structure of the bent LCD screen provided in Embodiment 1, 2 or 3 is further optimized, such as Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a support unit 4 is also provided in the rectangular groove 33 to provide lateral support for the FPC2 when it is bent;

[0068] The support unit 4 includes two sets of support members 41 arranged relatively parallel to each other. The support member 41 is composed of two upper and lower insulating support plates 42 arranged relatively to each other. Both ends of the two insulating support plates 42 are provided with overlapping ends 43 for forming an overlap with the FPC2.

[0069] The opposite sides of the two insulating support plates 42 are coated with double-sided adhesive 44;

[0070] The overlapping ends 43 on the two support plates 42 in the same group form a U-shaped groove together, and the height of the U-shaped groove is just adapted to the thickness of the FPC2. Therefore, in the actual assembly process, the upper and lower insulating support plates 42 can be clamped together on the surface of the FPC2 and attached to the FPC2 by double-sided adhesive 44 to form a stable state;

[0071] like Figure 5 As shown, the two support members 41 are respectively arranged on both sides of the rectangular groove 33, so that when the FPC2 is bent, the two support members 41 can be respectively located on both sides of the bending line, so that they can jointly form lateral support for the pressure relief groove 3 in the FPC2 on both sides of the bending line, avoiding the unevenness or even warping caused by inconsistent tension on the left and right sides of the FPC2 during the bending process.

[0072] Example 5

[0073] The FPC structure of the bent LCD screen provided in Example 4 is further optimized, such as Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a fastening groove 45 is opened in the middle of the insulating support plate 42, and the two groups of support members 41 shown are fastened with a positioning element 5 through the fastening groove 45. The positioning element 5 includes an aluminum plate 51 and a positioning plate 52 connected to both ends of the aluminum plate 51. The positioning plate 52 is connected to the corresponding support member 41 through the fastening groove 45;

[0074] The aluminum plate 51 in this embodiment may also be replaced by other materials, as long as it can satisfy the requirement that the positioning element 5 can bend synchronously and maintain its bent state after the FPC 2 is bent, so as to reduce the overall tension of the FPC 2;

[0075] like Figure 7 and Figure 8 As shown, positioning plates 52 are arranged at both ends of the aluminum plate 51, so that the positioning plates 52 can be adhered to the fastening grooves 45 in the upper and lower insulating support plates 42 by double-sided adhesive 44. At the same time, because the upper and lower insulating support plates 42 are in a mutually attached state, a certain resistance force can be given to the positioning plates 52, making it more stable and less likely to slide during assembly and installation;

[0076] The actual steps in the installation process are as follows:

[0077] First, the insulating support plates 42 located on the back of the FPC2 in the two support members 41 are fixed to the two sides of the rectangular groove 33 by double-sided adhesive 44, and then the two ends of the positioning plate 52 in the positioning unit 5 are respectively placed in the fastening grooves 45 on the two insulating support plates 42, and are fixed once by double-sided adhesive 44. Then, another insulating support plate 42 in the support member 41 is assembled on the front of the FPC2 and corresponds to the insulating support plate 42 on the back thereof. The corresponding insulating support plates 42 can form a secondary fixation for the positioning plate 52, thereby improving the overall connection strength of the positioning element 5, so that it can effectively transmit and disperse the tension in the subsequent actual bending application process;

[0078] Then when FPC2 is bent, since the aluminum plate 51 itself has certain bendable properties, it can bend synchronously with FPC2. When FPC2 is bent in place, the aluminum plate 51 also bends and positions synchronously with the bending angle of FPC2. At this time, the tension exerted on FPC2 during its use can be effectively dispersed through the support unit 4 and the positioning element 5, thereby dispersing the stress at different positions and reducing the problem of stress concentration in a certain place that is prone to tearing or falling off, further avoiding the situation where FPC2 is separated from the display unit 1 when in a bent state.

[0079] The use process of the FPC structure of the liquid crystal display screen provided by the utility model for bending is as follows:

[0080] A decompression groove 3 is formed by digging grooves at local positions on the entire surface of a conventional FPC2, and chamfers 1 34, 2 35 and 36 are opened at the inner corners of the triangular groove 32 and the rectangular groove 33 in the decompression groove 3. At the same time, the connecting wires involved in the FPC2 are distributed on both sides of the triangular groove 32, and then the support unit 4 and the positioning element 5 are assembled in the rectangular groove 33 in sequence to complete the design of the FPC2.

[0081] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A FPC structure for a liquid crystal display screen for bending, characterized in that: It includes: A display unit (1), a driving IC (15) being arranged on a surface of the display unit; An FPC (2) connected to the display unit (1) via a driver IC (15); A pressure relief groove (3) is formed on the FPC (2) and is used to improve the bending flexibility of the FPC.

2. The FPC structure of a liquid crystal display screen for bending use according to claim 1, characterized in that: The pressure relief groove (3) comprises a groove body (31); The groove body (31) is composed of a triangular groove (32) and a rectangular groove (33).

3. The FPC structure of a liquid crystal display screen for bending use according to claim 2, characterized in that: The top of the triangular groove (32) is arranged at a ninety-degree angle, and is used to assist the signal line in routing from the binding PAD end through the two sides of the FPC toward the plug interface end.

4. The FPC structure of a liquid crystal display screen for bending use according to claim 3, characterized in that: Both ends of the bottom of the rectangular groove (33) are formed with a first chamfer (34), and the top of the triangular groove (32) is formed with a second chamfer (35).

5. The FPC structure of a liquid crystal display screen for bending use according to claim 4, characterized in that: A third chamfer (36) is formed at the connection between the triangular groove (32) and the rectangular groove (33), and the first chamfer (34), the second chamfer (35) and the third chamfer (36) are used together to prevent tearing at the corners of the FPC (2).

6. The FPC structure of a liquid crystal display screen for bending use according to claim 1, characterized in that: The display unit (1) comprises an upper polarizer (11), an upper glass (12), a lower glass (13) and a lower polarizer (14); The upper polarizer (11), the upper glass (12), the lower glass (13) and the lower polarizer (14) are attached in sequence from the outside to the inside to form the display unit (1).

7. The FPC structure of a liquid crystal display screen for bending use according to claim 2, characterized in that: A support unit (4) is also provided in the rectangular groove (33) for providing lateral support for the FPC (2) when it is bent.

8. The FPC structure of a liquid crystal display screen for bending use according to claim 7, characterized in that: The support unit (4) comprises two groups of support members (41) arranged relatively parallel to each other; The support member (41) is composed of two upper and lower insulating support plates (42) arranged opposite to each other, and both ends of the two insulating support plates (42) are provided with overlapping ends (43) for forming an overlap with the FPC (2); Wherein, opposite sides of the two insulating support plates (42) are coated with double-sided adhesive (44).

9. The FPC structure of a liquid crystal display screen for bending use according to claim 8, characterized in that: A fastening groove (45) is provided in the middle of the insulating support plate (42), and the two groups of support members (41) are fastened together with the positioning element (5) through the fastening groove (45).

10. The FPC structure of a liquid crystal display screen for bending use according to claim 9, characterized in that: The positioning element (5) comprises an aluminum plate (51) and positioning plates (52) connected to both ends of the aluminum plate (51); The positioning plate (52) is connected to the corresponding support member (41) via a fastening groove (45).

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