Flexible Printed Circuit Board Fixing Device

Abstract

A flexible printed circuit board fixing device is used to fix a flexible printed circuit board on a display module with a curved surface structure; the display module includes a display screen, a heat dissipation layer and a heat dissipation layer protective film that are sequentially arranged on the non-display side of the display screen; a protective bracket is arranged on the side of the heat dissipation layer protective film away from the display screen to protect the integrated circuit on the flexible printed circuit board; the flexible printed circuit board is arranged on the side of the heat dissipation layer away from the display screen, and the orthographic projection of the heat dissipation layer protective film on the display screen does not overlap with the orthographic projection of the flexible printed circuit board on the display screen; the flexible printed circuit board includes a main body part, a connecting neck and a connector that are sequentially connected, the main body part is arranged to be connected to the display module, and the connector extends from one curved surface of the display module to the outside of the display module; the flexible printed circuit board fixing device includes: a fixing part, one end of the fixing part is connected to the protective bracket, and the other end of the fixing part is in contact with the connecting neck, and is arranged to fix the connecting neck on the curved surface of the heat dissipation layer.

Description

Technical Field

[0001] This application relates to, but is not limited to, display technologies, and particularly to a fixing device for a flexible printed circuit board. Background Art

[0002] Display modules with side curved displays are widely used in electronic products such as mobile phones and tablet computers due to advantages such as beautiful appearance, large screen-to-body ratio, and comfortable holding. In the current production process, the display module is connected to a flexible printed circuit board (FPC) and then shipped out for subsequent assembly of the entire machine. In some technologies, the connector of the flexible printed circuit board extends out from one side surface of the display module, exceeding the edge of the display module.

[0003] After research by the inventors of this application, it is found that the assembled side curved display module is prone to the problem of abnormal noise in the entire machine. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail in this application. This overview is not intended to limit the scope of protection of the claims.

[0005] Embodiments of the present disclosure provide a fixing device for a printed circuit board to solve the problem that the assembled side curved display module is prone to abnormal noise in the entire machine.

[0006] Embodiments of the present disclosure provide a fixing device for a printed circuit board, which is used to fix a flexible printed circuit board on a display module with a curved surface structure; the display module includes a display screen, a heat dissipation layer, and a heat dissipation layer protective film that are sequentially arranged on the non-display side of the display screen; a protective bracket is arranged on the side of the heat dissipation layer protective film away from the display screen, and the protective bracket is configured to protect the integrated circuit on the flexible printed circuit board; the flexible printed circuit board is arranged on the side of the heat dissipation layer away from the display screen, and the orthographic projection of the heat dissipation layer protective film on the display screen does not overlap with the orthographic projection of the flexible printed circuit board on the display screen; the flexible printed circuit board includes a main body part, a connecting neck, and a connector that are sequentially connected, the main body part is configured to be connected to the display module, and the connector extends from one side surface of the display module to the outside of the display module; the flexible printed circuit board fixing device includes: a fixing part, one end of the fixing part is connected to the protective bracket, and the other end of the fixing part is in contact with the connecting neck, and is configured to fix the connecting neck on the curved surface of the heat dissipation layer.

[0007] In an exemplary embodiment, the fixing portion includes a connecting portion, a pressing portion, and a contacting portion; one end of the connecting portion is connected to the protection bracket, and the other end of the connecting portion is connected to the pressing portion; one end of the contacting portion is connected to the pressing portion, and the other end of the contacting portion is in contact with the connecting neck, and is configured to fix the connecting neck on the curved surface of the heat dissipation layer.

[0008] In an exemplary embodiment, the connecting portion and the protection bracket are of an integral structure.

[0009] In an exemplary embodiment, the extending direction of the pressing portion intersects the planar portion of the display screen.

[0010] In an exemplary embodiment, the pressing portion and the connecting portion are of an integral structure.

[0011] In an exemplary embodiment, the material of the contacting portion is foam; the contacting portion is adhered to the pressing portion.

[0012] In an exemplary embodiment, the surface of the contacting portion in contact with the connecting neck is a first curved surface; the first curved surface is configured to cooperate with the curved surface of the heat dissipation layer so that the connecting neck extends along the curvature of the curved surface of the heat dissipation layer.

[0013] In an exemplary embodiment, the display module further includes a cover plate located on the display side of the display screen; the protection bracket includes an extending portion located outside the display module, and the extending portion extends from one end of the protection bracket adjacent to the straight edge of the display module towards the display module; the flexible printed circuit board fixing device further includes a hook portion connected to one end of the extending portion away from the protection bracket; the hook portion is located on the side of the cover plate away from the display screen, and the orthographic projection area of the hook portion on the cover plate is non-zero.

[0014] In an exemplary embodiment, the hook portion and the extending portion are of an integral structure.

[0015] In an exemplary embodiment, the distance between the orthographic projection of one end of the hook portion away from the straight edge of the adjacent cover plate on the cover plate and the straight edge of the adjacent cover plate is a, and 1 mm ≤ a ≤ 3 mm.

[0016] In an exemplary embodiment, the distance between the opposite side surfaces of the hook portion and the cover plate is b, and 0.3 mm ≤ b ≤ 0.7 mm.

[0017] In an exemplary embodiment, the flexible printed circuit board fixing device further includes a first support member located on the surface of the connector facing the display module side, configured to provide support to the connector; the first support member is connected to the protection bracket or the fixing portion, such that the distance between the connecting neck and the curved surface of the heat dissipation layer is greater than 0.

[0018] In an exemplary embodiment, the flexible printed circuit board fixing device further includes a tray, the tray includes a second support member, and the second support member is configured to provide support to the connector, such that the distance between the connecting neck and the curved surface of the heat dissipation layer is greater than 0.

[0019] In an exemplary embodiment, an avoidance groove is provided on the tray, and the avoidance groove is configured to accommodate the hook portion when the cover plate of the display module is placed flat downward on the tray.

[0020] In an exemplary embodiment, the distance between the connecting neck and the curved surface of the heat dissipation layer is greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0021] The flexible printed circuit board fixing device provided by the embodiments of the present disclosure fixes the connecting neck on the curved surface of the heat dissipation layer through the fixing portion connected to the protection bracket, solving the problem that the whole machine is prone to abnormal noise after the assembly of the side curved surface display module.

[0022] Other features and advantages of the present disclosure will be described in the following specification, and part of them will be obvious from the specification, or will be understood by implementing the present disclosure. Other advantages of the present disclosure can be realized and obtained through the solutions described in the specification and the drawings.

[0023] Other aspects can be understood after reading and understanding the drawings and the detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide an understanding of the technical solutions of the present disclosure, and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solutions of the present disclosure and do not constitute a limitation to the technical solutions of the present disclosure.

[0025] Figure 1 It is a schematic diagram of the shape of a side curved surface display module;

[0026] Figure 2 It is a top view of a partial structure of a display module when assembling a flexible printed circuit board;

[0027] Figure 3 It is a bottom view of a partial structure of a display module when assembling a flexible printed circuit board;

[0028] Figure 4It is a side view of a display module in the structure of assembling a flexible printed circuit board part;

[0029] Figure 5 It is a bottom view of a display module in the structure of assembling a flexible printed circuit board part in an exemplary embodiment;

[0030] Figure 6 It is a side view of a display module in the structure of assembling a flexible printed circuit board part in an exemplary embodiment;

[0031] Figure 7 It is a top view of a display module placed flat on a tray in an exemplary embodiment;

[0032] Figure 8 It is a schematic diagram of a hook-back part located in an avoidance groove in an exemplary embodiment.

[0033] Reference numerals:

[0034] 1, 1'-protective bracket; 3, 3'-heat dissipation layer protective film; 4, 4'-heat dissipation layer;

[0035] 5, 5'-cover plate; 6, 6'-adhesive layer; 8-tray;

[0036] 11, 11'-support part; 12, 12'-extension part; 13-hook-back part;

[0037] 21, 21'-main body part; 22, 22'-connection neck; 23, 23'-connector;

[0038] 24-reinforcing member; 71-connection part; 72-pressure part;

[0039] 73-contact part; 81-first support member; 82-avoidance groove;

[0040] 100-display module; 101-first side; 102-second side;

[0041] 103-third side; 104-fourth side; 111-buffer part. Detailed implementation manners

[0042] The present disclosure describes multiple embodiments, but the description is exemplary rather than restrictive, and it will be apparent to those of ordinary skill in the art that there can be more embodiments and implementation solutions within the scope encompassed by the embodiments described in the present disclosure. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically restricted, any feature or element of any embodiment can be used in combination with any other feature or element in any other embodiment, or can replace any other feature or element in any other embodiment.

[0043] The present disclosure includes and contemplates combinations with features and elements known to those of ordinary skill in the art. The embodiments, features, and elements disclosed in the present disclosure can also be combined with any conventional features or elements to form unique inventive solutions defined by the claims. Any feature or element of any embodiment can also be combined with features or elements from other inventive solutions to form another unique inventive solution defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in the present disclosure can be implemented alone or in any suitable combination. Therefore, the embodiments are not subject to other limitations except those made in accordance with the appended claims and their equivalents. In addition, various modifications and changes can be made within the scope of the appended claims.

[0044] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not depend on the specific order of the steps described herein, the method or process should not be limited to the specific order of steps described. As will be understood by those of ordinary skill in the art, other step orders are possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation on the claims. In addition, the claims directed to the method and / or process should not be limited to performing their steps in the order written, and those skilled in the art can easily understand that these orders can vary and still remain within the spirit and scope of the embodiments of the present disclosure.

[0045] In the drawings, sometimes for clarity, the size of one or more constituent elements, the thickness of a layer, or a region is exaggerated. Therefore, one aspect of the present disclosure is not necessarily limited to such dimensions, and the shape and size of one or more components in the drawings do not reflect the true scale. In addition, the drawings schematically show ideal examples, and one aspect of the present disclosure is not limited to the shapes or values shown in the drawings.

[0046] The ordinal numbers such as "first", "second", "third", etc. in this specification are set to avoid confusion of components, rather than to limit the quantity. "Multiple" in this disclosure means two or more quantities.

[0047] In this specification, for convenience, terms indicating orientation or positional relationship such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are used to describe the positional relationship of components with reference to the accompanying drawings. This is only for the convenience of describing this specification and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this disclosure. The positional relationship of the components changes appropriately according to the direction of the described components. Therefore, it is not limited to the terms described in the specification and can be replaced appropriately according to the situation.

[0048] In this specification, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate member, or the communication inside two components. For those of ordinary skill in the art, the meanings of the above terms in this disclosure can be understood according to the situation.

[0049] In this specification, "electrically connected" includes the situation where components are connected together through an element having a certain electrical effect. There is no particular limitation on the "element having a certain electrical effect" as long as it can transmit electrical signals between the components to be connected. Examples of the "element having a certain electrical effect" include not only electrodes and wirings, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements having various functions.

[0050] In this specification, "parallel" means a state where the angle formed by two straight lines is -10° or more and 10° or less. Therefore, it also includes the state where the angle is -5° or more and 5° or less. In addition, "perpendicular" means a state where the angle formed by two straight lines is 80° or more and 100° or less. Therefore, it also includes the state of an angle of 85° or more and 95° or less.

[0051] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0052] Figure 1 It is a schematic diagram of the shape of a side curved surface display module. As Figure 1As shown, the display module 100 can generally be rectangular. The opposite first side 101 and second side 102 of the display module 100 can be curved surface structures, and the other two opposite third sides 103 and fourth sides 104 can be straight edges. The display module 100 includes a planar portion and a curved surface portion. The two sides with curved surface structures are the curved surface portions, and the rest are the planar portion. The display module 100 can include a heat dissipation layer, a display screen, and a cover plate. At the curved surface portion of the display module 100, the heat dissipation layer, the display screen, and the cover plate also have a curved surface structure. In the embodiments of the present disclosure, Figure 1 The display module in the shape shown is taken as an example for illustration. In other embodiments, the display module can be in other shapes, such as triangular, quadrilateral of other shapes, circular, oval, or polygon of other shapes, etc. At least one side (or at least one arc segment) of the display module is a curved surface structure, and the present disclosure does not limit this.

[0053] Figure 2 It is a top view of a partial structure of a display module when assembling a flexible printed circuit board. Figure 3 It is a bottom view of a partial structure of a display module when assembling a flexible printed circuit board, Figure 3 Some structures are omitted in the illustration. Figure 4 It is a side view of a partial structure of a display module when assembling a flexible printed circuit board. As Figures 2 to 4 shown, the display module includes a display screen (not shown in the figure). A cover plate 5' is provided on the display side of the display screen, a heat dissipation layer 4' is provided on the non-display side of the display screen (i.e., the side away from the cover plate 5'), and a heat dissipation layer protective film 3' is provided on the side of the heat dissipation layer 4' away from the cover plate 5'. The flexible printed circuit board is provided on the side of the heat dissipation layer 4' away from the cover plate 5'. The orthographic projection of the heat dissipation layer protective film 3' on the display screen does not overlap with the orthographic projection of the flexible printed circuit board on the display screen. The flexible printed circuit board includes a main body portion 21', a connecting neck 22', and a connector 23'. The main body portion 21' is arranged to be connected to the display module. The flexible printed circuit board can be adhered to the heat dissipation layer 4' through an adhesive layer 6'. In some technologies, the adhesive layer 6' is only provided on the planar portion of the display module. As Figure 2 shown, the connector 23' extends out from one side surface of the display module and is located outside the display module. The connecting neck 22' can be placed on the curved surface structure of the display module. Currently, generally a reinforcing member made of steel sheet material (not shown in the figure) is provided at the connector 23'. A protective bracket 1' is provided on the side of the heat dissipation layer protective film 3' away from the cover plate 5'. The protective bracket 1' can be adhered to the heat dissipation layer protective film 3', Figure 2 The dotted area A in the figure can be the adhesion area. As Figure 2As shown, the orthographic projection of the protection bracket 1' on the display screen does not overlap with the curved surface part of the display screen. The orthographic projection of the protection bracket 1' on the display screen at least partially overlaps with the orthographic projection of the main body part 21' on the display screen. A plurality of support parts 11' are provided on the protection bracket 1'. The orthographic projection of the plurality of support parts 11' on the display screen is within the range of the orthographic projection of the main body part 21' on the display screen. The support part 11' can extend towards one side of the main body part 21' to play a role in supporting and protecting the main body part 21'. An extension part 12' is also provided on the protection bracket 1'. The extension part 12' is located outside the display module and extends from the side of the protection bracket 1' adjacent to the straight edge of the display module towards the display module. In the plane of the flat part of the display module, the surface of the extension part 12' on the side away from the protection bracket 1' can be flush with the surface of the cover plate 5' on the side away from the protection bracket 1'.

[0054] Through research by the inventor of the present application, it is found that during the packaging, transportation, and transfer of the display module, the cover plate 5' is placed flat on the tray (i.e., the Tray tray) with the bottom facing down for transportation. In this placement state, the connecting neck 22' is placed on the curved surface structure of the display module, and the connector 23' is located outside the display module. Under the action of gravity, the connector 23' will form a pulling force on the main body part 21' and the connecting neck 22'. The reinforcing member made of steel sheet material further increases this pulling force. And the connector 23' is prone to shaking during transportation, so that the direction and magnitude of this pulling force will also change accordingly. Under the action of this pulling force, as Figure 3 shown, the adhesive layer 6' at the circular area B between the main body part 21' and the heat dissipation layer 4' is prone to delamination, resulting in abnormal noise of the whole machine after the display module is assembled. And at the circular area C, the connecting neck 22' continuously presses the heat dissipation layer 4' and the display screen, which not only easily causes the copper foil of the heat dissipation layer 4' to collapse, affecting the appearance quality, but also easily causes cracks to appear at the edge of the display screen in severe cases.

[0055] Embodiments of the present disclosure provide a fixing device for a flexible printed circuit board, which is used to fix a flexible printed circuit board on a display module with a curved surface structure; the display module includes a display screen, a heat dissipation layer and a heat dissipation layer protective film sequentially arranged on the non-display side of the display screen; a protective bracket is arranged on the side of the heat dissipation layer protective film away from the display screen, and the protective bracket is configured to protect the integrated circuit on the flexible printed circuit board; the flexible printed circuit board is arranged on the side of the heat dissipation layer away from the display screen, and the orthographic projection of the heat dissipation layer protective film on the display screen does not overlap with the orthographic projection of the flexible printed circuit board on the display screen; the flexible printed circuit board includes a main body part, a connecting neck and a connector connected in sequence, the main body part is configured to be connected to the display module, and the connector extends from a curved surface on one side of the display module to the outside of the display module; the flexible printed circuit board fixing device includes: a fixing part, one end of the fixing part is connected to the protective bracket, and the other end of the fixing part is in contact with the connecting neck, and is configured to fix the connecting neck on the curved surface of the heat dissipation layer.

[0056] The flexible printed circuit board fixing device provided by the embodiments of the present disclosure fixes the connecting neck on the curved surface of the heat dissipation layer through the fixing part connected to the protective bracket, and solves the problem that the whole machine is prone to abnormal noise after the side curved surface display module is assembled.

[0057] The display module in the embodiments of the present disclosure can be applied to: any product or component with a display function such as mobile phones, tablet computers, televisions, monitors, laptop computers, digital photo frames, navigation devices, etc.

[0058] In an exemplary embodiment, the fixing part includes a connecting part, a pressure part and a contact part; one end of the connecting part is connected to the protective bracket, and the other end of the connecting part is connected to the pressure part; one end of the contact part is connected to the pressure part, and the other end of the contact part is in contact with the connecting neck, and is configured to fix the connecting neck on the curved surface of the heat dissipation layer.

[0059] In an exemplary embodiment, the connecting part and the protective bracket are of an integral structure.

[0060] In an exemplary embodiment, the extending direction of the pressure part intersects with the planar part of the display screen.

[0061] In an exemplary embodiment, the pressure part and the connecting part are of an integral structure.

[0062] In an exemplary embodiment, the material of the contact part is foam; the contact part is pasted on the pressure part.

[0063] In an exemplary embodiment, the surface of the contact portion in contact with the connecting neck is a first curved surface; the first curved surface is arranged to cooperate with the curved surface of the heat dissipation layer, so that the connecting neck extends along the curvature of the curved surface of the heat dissipation layer.

[0064] In an exemplary embodiment, the display module further includes a cover plate located on the display side of the display screen; the protective bracket includes an extension portion located outside the display module, and the extension portion extends from one end of the protective bracket adjacent to the straight edge of the display module towards the display module; the flexible printed circuit board fixing device further includes a hook portion connected to one end of the extension portion away from the protective bracket; the hook portion is located on the side of the cover plate away from the display screen, and the orthographic projection area of the hook portion on the cover plate is non-zero.

[0065] In an exemplary embodiment, the hook portion and the extension portion are of an integral structure.

[0066] In an exemplary embodiment, the distance between the orthographic projection of one end of the hook portion away from the adjacent straight edge of the cover plate on the cover plate and the adjacent straight edge of the cover plate is a, and 1 mm ≤ a ≤ 3 mm.

[0067] In an exemplary embodiment, the distance between the opposite side surfaces of the hook portion and the cover plate is b, and 0.3 mm ≤ b ≤ 0.7 mm.

[0068] In an exemplary embodiment, the flexible printed circuit board fixing device further includes a first support member located on the surface of the connector facing the display module, arranged to provide support to the connector; the first support member is connected to the protective bracket or the fixing portion, so that the distance between the connecting neck and the curved surface of the heat dissipation layer is greater than 0.

[0069] In an exemplary embodiment, the flexible printed circuit board fixing device further includes a tray, and the tray includes a second support member arranged to provide support to the connector, so that the distance between the connecting neck and the curved surface of the heat dissipation layer is greater than 0.

[0070] In an exemplary embodiment, an avoidance groove is provided on the tray, and the avoidance groove is arranged to accommodate the hook portion when the cover plate of the display module is placed flat on the tray with the cover plate facing down.

[0071] In an exemplary embodiment, the distance between the connecting neck and the curved surface of the heat dissipation layer is greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0072] Figure 5 It is a bottom view of a partial structure of the flexible printed circuit board during the assembly of the display module in an exemplary embodiment. AsFigure 5 As shown, an embodiment of the present disclosure provides a flexible printed circuit board fixing device for fixing a flexible printed circuit board on a display module with a curved surface structure. The display module includes a display screen (not shown in the figure). A cover plate 5 is provided on the display side of the display screen, and a heat dissipation layer 4 is provided on the non-display side of the display screen (i.e., the side away from the cover plate 5). A heat dissipation layer protective film 3 is provided on the side of the heat dissipation layer 4 away from the cover plate 5 (see Figure 7 ). A protective bracket 1 is provided on the side of the heat dissipation layer protective film 3 away from the cover plate 5, and the protective bracket 1 is configured to protect the integrated circuit on the flexible printed circuit board. The flexible printed circuit board is provided on the side of the heat dissipation layer 4 away from the cover plate 5, and the orthographic projection of the heat dissipation layer protective film 3 on the display screen does not overlap with the orthographic projection of the flexible printed circuit board on the display screen. The flexible printed circuit board includes a main body portion 21, a connecting neck 22, and a connector 23 that are connected in sequence. The main body portion 21 is configured to be connected to the display module, and the connector 23 extends from one curved surface of the display module to the outside of the display module. The flexible printed circuit board fixing device includes: a fixing portion, one end of the fixing portion is connected to the protective bracket 1, and the other end of the fixing portion is in contact with the connecting neck 22, and is configured to fix the connecting neck 22 on the curved surface of the heat dissipation layer 4.

[0073] In an exemplary embodiment, the main body portion 21 is configured to be connected to the display screen, and the main body portion 21 and the display screen can be connected by an anisotropic conductive film (ACF). In an exemplary embodiment, the display screen has a bending area (not shown in the figure). After the main body portion 21 is bound and connected to the bending area, it can be pasted on the surface of the heat dissipation layer 4.

[0074] In an exemplary embodiment, the flexible printed circuit board can be pasted on the heat dissipation layer 4 through an adhesive layer 6. In an exemplary embodiment, the adhesive layer 6 can be located on the flat portion of the display module.

[0075] In an exemplary embodiment, the connector 23 can be a board-to-board (BTB) connector, and the present disclosure is not limited thereto.

[0076] In an exemplary embodiment, the protective bracket 1 can be pasted on the heat dissipation layer protective film 3. For example, a double-sided tape can be used to fix the protective bracket 1 on the heat dissipation layer protective film 3, and the present disclosure is not limited thereto.

[0077] In an exemplary embodiment, as Figure 5As shown, the fixing part may include a connecting part 71, a pressing part 72 and a contacting part 73. One end of the connecting part 71 is connected to the protection bracket 1, the other end of the connecting part 71 is connected to the pressing part 72, one end of the contacting part 73 is connected to the pressing part 72, and the other end of the contacting part 73 is in contact with the connecting neck 22, and is arranged to fix the connecting neck 22 on the curved surface of the heat dissipation layer 4.

[0078] In an exemplary embodiment, the connecting part 71 and the protection bracket 1 may be an integral structure, and the connecting part 71 can be regarded as an extension of the protection bracket 1 to the curved surface on one side of the heat dissipation layer 4. Alternatively, the connecting part 71 and the protection bracket 1 may be fixedly connected, and a suitable connection method can be adopted according to needs.

[0079] In an exemplary embodiment, the extending direction of the pressing part 72 may intersect the flat part of the display screen. In an exemplary embodiment, the extending direction of the pressing part 72 may be perpendicular to the flat part of the display screen.

[0080] By setting the extending direction of the pressing part 72 perpendicular to the flat part of the display screen, when the cover plate 5 of the display module is placed horizontally downward on the tray, the gravity of the pressing part 72 and the contacting part 73 can directly act on the connecting neck 22, which helps to fix the connecting neck 22 on the curved surface of the heat dissipation layer 4.

[0081] In an exemplary embodiment, the pressing part 72 and the connecting part 71 may be an integral structure, or the pressing part 72 and the connecting part 71 may be fixedly connected, and a suitable connection method can be adopted according to needs.

[0082] In an exemplary embodiment, the material of the contacting part 73 may be foam, and the contacting part 73 made of foam material can be pasted on the pressing part 72. In other embodiments, other materials may be selected for the contacting part 73, and the present disclosure does not limit this.

[0083] In an exemplary embodiment, the surface of the contacting part 73 in contact with the connecting neck 22 may be a first curved surface, and the first curved surface may cooperate with the curved surface of the heat dissipation layer 4 so that the connecting neck 22 can extend along the curvature of the curved surface of the heat dissipation layer 4. In an exemplary embodiment, the first curved surface may be a shape imitating the curved surface of the heat dissipation layer 4.

[0084] By using the contact part 73 made of foam material to press the connecting neck 22 against the curved surface of the heat dissipation layer 4, the connecting neck 22 in contact with the contact part 73 is uniformly stressed, enabling the connecting neck 22 to extend along the curvature of the curved surface of the heat dissipation layer 4, reducing the pressure of the connecting neck 22 on the curved surface edge of the heat dissipation layer 4, avoiding the collapse of the copper foil of the heat dissipation layer 4, and also preventing cracks from appearing at the edge of the display screen. By setting the surface of the contact part 73 in contact with the connecting neck 22 as the first curved surface, the extension curvature of the connecting neck 22 along the curved surface of the heat dissipation layer 4 can be better shaped. Moreover, by fixing the connecting neck 22 on the curved surface of the heat dissipation layer 4, it helps to reduce the stress on the connecting neck 22 at area B, avoiding delamination at area B, and thus avoiding the problem of abnormal noise of the whole machine.

[0085] In an exemplary embodiment, the orthographic projection of the protection bracket 1 on the display screen at least partially overlaps with the orthographic projection of the main body part 21 on the display screen.

[0086] In an exemplary embodiment, a plurality of support parts 11 are provided on the protection bracket 1. The orthographic projections of the plurality of support parts 11 on the display screen are within the range of the orthographic projection of the main body part 21 on the display screen. The support parts 11 can extend towards one side of the main body part 21 to play a role in supporting and protecting the main body part 21.

[0087] In an exemplary embodiment, a buffer part 111 can be provided on the surface of the support part 11 facing the main body part 21. The buffer part 111 can be prepared from a material with buffer function, and the present disclosure places no limitation on this.

[0088] Figure 6 It is a side view of the structure of the flexible printed circuit board part during the assembly of the display module in an exemplary embodiment. In an exemplary embodiment, as Figure 6 shown, an extension part 12 is further provided on the protection bracket 1. The extension part 12 is located outside the display module and extends from one end of the protection bracket 1 adjacent to the straight edge of the display module towards the display module. The flexible printed circuit board fixing device further includes a hook-back part 13. The hook-back part 13 is connected to the end of the extension part 12 far from the protection bracket 1 and extends from the side of the cover plate 5 far from the display screen to the coverage range of the cover plate 5. That is, the hook-back part 13 is located on the side of the cover plate 5 far from the display screen, and the orthographic projection area of the hook-back part 13 on the cover plate 5 is non-zero.

[0089] In an exemplary embodiment, the hook-back portion 13 and the extension portion 12 may be an integral structure, and the hook-back portion 13 may be regarded as a straight edge of the extension portion 12 disposed around the display module, or the hook-back portion 13 and the extension portion 12 may be fixedly connected, and the present disclosure does not limit this. In the case where one side of the protective bracket 1 is connected to the heat dissipation layer protective film 3, by disposing the hook-back portion 13 connected to the extension portion 12 on the side of the cover plate 5 away from the display screen, the protective bracket 1 surrounds the straight edge of the display module at the hook-back portion 13, which is equivalent to clamping the display module in the middle of the protective bracket 1 by "clamping", so that the contact portion 73 can provide pressure to the connection neck 22 more stably.

[0090] In an exemplary embodiment, the pressure applied by the contact portion 73 to the connection neck 22 can be adjusted by adjusting the length of the hook portion 13 extending into the range of the cover plate 5, the mass of the hook portion 13, and other parameters. In an exemplary embodiment, the pressure applied by the contact portion 73 to the connection neck 22 is preferably such as to ensure that the connection neck 22 is tilted along the curved surface of the heat dissipation layer 4 and that the heat dissipation layer 4 is not embossed at the position of the contact portion 73. In practical applications, the pressure applied by the contact portion 73 to the connection neck 22 can be adjusted as needed, and the present disclosure does not limit this.

[0091] Figure 6 The middle elliptical area D encircles the gap between the back hook portion 13 and one side straight edge of the display module. In an exemplary embodiment, the length of the overlapping portion of the back hook portion 13 and the cover plate 5 is a, that is, the first distance between the orthographic projection of the end of the back hook portion 13 away from the adjacent straight edge of the cover plate 5 on the cover plate 5 and the adjacent straight edge of the cover plate 5 is a. In an exemplary embodiment, 1 mm ≤ a ≤ 3 mm, and in an exemplary embodiment, a is about 2 mm.

[0092] In an exemplary embodiment, a second distance between the hooked portion 13 and the opposite side surface of the cover plate 5 is b. In an exemplary embodiment, 0.3 mm ≤ b ≤ 0.7 mm, and in an exemplary embodiment, b is about 0.5 mm.

[0093] In an exemplary embodiment, the flexible printed circuit board fixing device may further include a first support member 81 . The first support member 81 may be located on a surface of the connector 23 facing the display module and configured to provide support to the connector 23 .

[0094] In an exemplary embodiment, if Figure 5 As shown, the flexible printed circuit board also includes a reinforcing member 24, which is disposed on the surface of the connector 23 facing the display module. In an exemplary embodiment, the reinforcing member 24 is made of metal, such as steel. In an exemplary embodiment, the first support member 81 can be disposed on the surface of the reinforcing member 24 facing the display module.

[0095] In an exemplary embodiment, the first support member 81 may be connected to the protection bracket 1 or the fixing portion, such that a third distance exists between the connection neck 22 and the curved surface of the heat dissipation layer 4, and the third distance is greater than 0. The first support member 81 cooperates with the protection bracket 1 or the fixing portion to balance the force on the connector 23, so that the connector 23 does not droop naturally, such that in the direction of gravity, the connector 23 does not form a tensile force on the connection neck 22, avoiding the compression on the heat dissipation layer 4 and the display screen. The shape of the first support member 81 may be set as needed. For example, the first support member 81 may be a circular, oval or any other shaped sheet, or may be a cubic structure with a triangular cross-sectional shape as shown in Figure 5 or may be any other arbitrary shaped structure, and the present disclosure does not limit this. The first support member 81 may be attached to the connector 23, or there may be no need to fix between the first support member 81 and the connector 23. The first support member 81 and the protection bracket 1 or the fixing portion may be connected by means of pasting or snap-fitting, or the first support member 81 and the protection bracket 1 or the fixing portion may be an integral structure, and the first support member 81 and the connector 23 are not fixed.

[0096] In this embodiment, by connecting the first support member 81 to the protection bracket 1 or the fixing portion, the connector 23 is lifted, and by lifting the connector 23, the connection neck 22 can be driven to lift upward, such that a third distance greater than 0 exists between the connection neck 22 and the curved surface of the heat dissipation layer 4, which can further avoid the compression of the connection neck 22 on the heat dissipation layer 4 and the display screen. In an exemplary embodiment, the value of the third distance may be set such that even if the connector 23 shakes, the connection neck 22 does not come into contact with the heat dissipation layer 4. In an exemplary embodiment, the third distance may be greater than or equal to 0.5 mm and less than or equal to 1 mm, and the value of the third distance may be set according to needs and actual situations, and the present disclosure does not limit this.

[0097] Figure 7 is a top view of the display module lying flat on the tray in an exemplary embodiment, Figure 7 is a partial schematic view of the tray, showing the situation of a single display module located on the tray. Figure 8 is a schematic view of the hook-back portion located in the avoidance groove in an exemplary embodiment. In an exemplary embodiment, the flexible printed circuit board fixing device may further include a tray 8, and the tray 8 is provided with an avoidance groove 82, and the avoidance groove 82 is configured to accommodate the hook-back portion 13 when the cover plate 5 of the display module is placed flat on the tray downward, so that the display module maintains a horizontal state on the tray. Figure 7 The two oval regions in Figure 8 show the position of the avoidance groove 82 on the tray 8, Figure 7 and Figure 8As shown, in the directions parallel and perpendicular to the straight edge of the display module, the size of the avoidance groove 82 is larger than that of the extension part 12 and the hook-back part 13. In the direction perpendicular to the plane part of the display module, the depth of the avoidance groove 82 is greater than the lengths of the extension part 12 and the hook-back part 13 in this direction, which facilitates the placement and removal of the display module.

[0098] In an exemplary embodiment, a second support member (not shown in the figure) may be provided on the tray 8. The second support member is configured to provide support to the connector 23, so that there is a third distance between the connecting neck 22 and the curved surface part of the heat dissipation layer 4, and the third distance is greater than 0. The third distance can refer to the description in the above embodiment and will not be elaborated here. By providing the second support member on the tray 8, the force on the connector 23 can be balanced, so that the connector 23 will not droop naturally, and in the direction of gravity, the connector 23 will not form a pulling force on the connecting neck 22, avoiding the compression of the heat dissipation layer 4 and the display screen.

[0099] In an exemplary embodiment, the shape and structure of the second support member may refer to the first support member 81, but the second support member is a structure extending from the tray 8 and is not connected to the protection bracket 1 or the fixing part. In an exemplary embodiment, the second support member may not be connected to the connector 23.

[0100] When the display module is horizontally placed on the tray 8, it is only necessary to place the connector 23 on the second support member. Compared with the case where the first support member 81 is connected to the protection bracket 1 or the fixing part, the process of placing the display module in this embodiment is simpler, which can save the time required for the display module to leave the factory, can realize the reuse of the second support member, and save costs.

[0101] In an exemplary embodiment, the second support member may be a columnar structure perpendicular to the plane part of the display module. The cross-section of the columnar structure may be circular, elliptical, triangular, quadrilateral or other polygonal shapes. Or, the second support member may be other structures such as spherical, hemispherical, funnel-shaped, etc., as long as it can form a third distance between the connecting neck 22 and the curved surface of the heat dissipation layer 4. In practical applications, the shape and structure of the support part can be set as needed, and the present disclosure does not limit this.

[0102] The flexible printed circuit board fixing device provided by the embodiments of the present disclosure is applied during the period from the factory to the assembly of the display module. When the display module leaves the factory, the cover plate 5 is placed flat on the tray 8 with the downward side, and the hook-back portion 13 is accommodated in the avoidance groove 82. The connecting neck 22 is fixed to the curved surface of the heat dissipation layer 4 by the fixing portion, reducing the stress on area B, being able to avoid delamination in area B, and avoiding the problem of abnormal noise of the whole machine. The second support member provided on the tray 8 forms a support for the connector 23, being able to balance the stress on the connector 23, preventing the connector 23 from forming a tensile force on the connecting neck 22, and being able to form a third distance greater than 0 between the connecting neck 22 and the curved surface of the heat dissipation layer 4. Even if the connector 23 shakes during transportation, the connecting neck 22 will not contact the curved surface of the heat dissipation layer 4, being able to further avoid the compression of the connecting neck 22 on the heat dissipation layer 4 and the display screen, avoiding the copper foil collapse at the vertex of the curved surface of the heat dissipation layer 4 and also avoiding the problem of cracks on the display screen. When the display module is transported to the customer for the assembly of the whole machine, the manipulator can adsorb the display module and tear off the heat dissipation layer protective film 3 in the vertical direction. Since the protection bracket 1 is adhered to the heat dissipation layer protective film 3, the protection bracket 1 is peeled off together with the heat dissipation layer protective film 3. Under the influence of gravity, the protection bracket 1 automatically falls off, and the fixing portion and the hook-back portion 13 connected to the protection bracket 1 also fall off accordingly. The removal process of the flexible printed circuit board fixing device is simple, without the need to add additional operations, and the customer experience is good.

[0103] Although the disclosed embodiments of the present invention are as above, the above content is only an embodiment adopted for the convenience of understanding the present invention and is not used to limit the present invention. Any person skilled in the art within the scope of the present invention can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the present invention. However, the patent protection scope of the present invention shall still be subject to the scope defined by the appended claims.

Claims

1. A flexible printed circuit board fixing device, characterized in that, For fixing a flexible printed circuit board on a display module of a curved surface structure; The display module includes a display screen, a heat dissipation layer, and a heat dissipation layer protection film that are sequentially arranged on the non-display side of the display screen; A protection bracket is arranged on the side of the heat dissipation layer protection film away from the display screen, and the protection bracket is arranged to protect the integrated circuit on the flexible printed circuit board; the flexible printed circuit board is arranged on the side of the heat dissipation layer away from the display screen, and the orthographic projection of the heat dissipation layer protection film on the display screen does not overlap with the orthographic projection of the flexible printed circuit board on the display screen; The flexible printed circuit board includes a main body part, a connection neck, and a connector that are sequentially connected. The main body part is arranged to be connected to the display module, and the connector extends from one side surface of the display module to the outside of the display module; The flexible printed circuit board fixing device includes: a fixing part, one end of the fixing part is connected to the protection bracket, and the other end of the fixing part is in contact with the connection neck, and is arranged to fix the connection neck on the curved surface of the heat dissipation layer; The display module further includes a cover plate, and the cover plate is located on the display side of the display screen; the protection bracket includes an extension part, and the extension part is located outside the display module, and the extension part extends from one end of the protection bracket adjacent to the straight edge of the display module towards the display module; The flexible printed circuit board fixing device further includes a hook part, and the hook part is connected to one end of the extension part away from the protection bracket; the hook part is located on the side of the cover plate away from the display screen, and the orthographic projection area of the hook part on the cover plate is not zero.

2. The flexible printed circuit board fixing device according to claim 1, wherein The fixing part includes a connection part, a pressure part, and a contact part; One end of the connection part is connected to the protection bracket, and the other end of the connection part is connected to the pressure part; one end of the contact part is connected to the pressure part, and the other end of the contact part is in contact with the connection neck, and is arranged to fix the connection neck on the curved surface of the heat dissipation layer.

3. The flexible printed circuit board fixing device according to claim 2, wherein, The connection part and the protection bracket are of an integral structure.

4. The flexible printed circuit board fixing device according to claim 2, wherein, The extending direction of the pressure part intersects with the plane part of the display screen.

5. The flexible printed circuit board fixing device according to claim 2, characterized in that, The pressure part and the connection part are of an integral structure.

6. The flexible printed circuit board fixing device according to claim 2, characterized in that, The material of the contact part is foam; the contact part is pasted on the pressure part.

7. The flexible printed circuit board fixing device according to claim 2, characterized in that, The surface of the contact part in contact with the connection neck is a first curved surface; the first curved surface is arranged to cooperate with the curved surface of the heat dissipation layer so that the connection neck extends along the radian of the curved surface of the heat dissipation layer.

8. The flexible printed circuit board fixing device according to claim 1, wherein, The hook part and the extension part are of an integral structure.

9. The flexible printed circuit board fixing device according to claim 1, characterized in that, The distance between the orthographic projection of one end of the hook part away from the straight edge of the adjacent cover plate on the cover plate and the straight edge of the adjacent cover plate is a, and 1 mm ≤ a ≤ 3 mm.

10. The flexible printed circuit board fixing device according to claim 1, wherein, The distance between the opposite side surfaces of the hook part and the cover plate is b, and 0.3 mm ≤ b ≤ 0.7 mm.

11. The flexible printed circuit board fixing device according to claim 1, characterized in that, The flexible printed circuit board fixing device further includes a first support member, and the first support member is located on the surface of the connector facing the display module side, and is arranged to provide support for the connector; The first support member is connected to the protection bracket or the fixing portion, such that the distance between the connecting neck and the curved surface of the heat dissipation layer is greater than 0.

12. The flexible printed circuit board fixing device according to claim 1, wherein, The flexible printed circuit board fixing device further includes a tray, the tray includes a second support member, and the second support member is configured to provide support to the connector, such that the distance between the connecting neck and the curved surface of the heat dissipation layer is greater than 0.

13. The flexible printed circuit board fixing device according to claim 12, wherein, An avoidance groove is provided on the tray, and the avoidance groove is configured to accommodate the hook-back portion when the cover plate of the display module is placed flat downward on the tray.

14. The flexible printed circuit board fixing device according to claim 11 or 12, characterized in that, The distance between the connecting neck and the curved surface of the heat dissipation layer is greater than or equal to 0.5 mm and less than or equal to 1 mm.

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