Circuit board structure and display device

Abstract

The present application provides a circuit board structure and a display device, wherein the circuit board structure comprises a first circuit component, an extendable component and a second circuit component which are stacked in sequence, wherein the extendable component comprises a flexible substrate and an extendable conductive layer which are stacked in sequence, wherein the flexible substrate is arranged on the first circuit component, and the extendable conductive layer is arranged on the side of the flexible substrate which is away from the first circuit component; wherein the first circuit component has at least one first notch, and the second circuit component has at least one second notch, and the first notch and the second notch correspond to each other, and the extendable component forms an extendable portion at the position corresponding to a first notch and a second notch, and the extendable portion is used to connect a switching circuit component. The extendable portion can absorb the stress generated by the bending of the circuit board structure, and will not transmit the stress to the display panel through the switching circuit component, and can prevent the display panel from being subjected to stress and pulling the liquid crystal molecules to cause light leakage, so as to improve the display effect of the display panel.

Description

Technical Field

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

[0002] In recent years, curved display devices have become increasingly popular among consumers due to their excellent visual experience, comfortable viewing experience and innovative design style.

[0003] A plurality of printed circuit boards are also required to be arranged in the curved display device, and the plurality of printed circuit boards are connected and driven to control the display panel through a switching circuit component (including a cover chip film, etc.) to realize normal display of the display panel. However, the printed circuit board cannot be bent normally. In the related art, when the printed circuit board is applied to the curved display device, it is easy to be deformed or misaligned, and the display panel is pulled through the switching circuit component, affecting the normal display panel. Summary of the invention

[0004] The purpose of the present application is to provide a circuit board structure and a display device to solve the technical problem in the related art that a printed circuit board is prone to deformation or dislocation when applied to a curved display device, and the display panel is pulled by a switching circuit component, thereby affecting the normal phenomenon of the display panel.

[0005] In a first aspect, the present application provides a circuit board structure, which is applied to a display device, and includes a first circuit component, a stretchable component, and a second circuit component stacked in sequence, wherein the stretchable component includes a flexible substrate and a stretchable conductive layer stacked in sequence, wherein the flexible substrate is disposed on the first circuit component, and the stretchable conductive layer is disposed on a side of the flexible substrate away from the first circuit component;

[0006] Among them, the first circuit component has at least one first notch, the second circuit component has at least one second notch, the first notch and the second notch correspond one to one, and the extendable component forms an extendable part corresponding to the position of one first notch and one second notch, and the extendable part is used to connect the adapter circuit component.

[0007] In the circuit board structure provided by the present application, the first circuit component, the extendable component and the second circuit component are stacked in sequence, the first circuit component has at least one first notch, the second circuit component has at least one second notch, the first notch and the second notch correspond one to one, and the extendable component forms an extendable portion corresponding to the position of the first notch and the second notch, and the extendable portion is used to connect the switching circuit component. The switching circuit component is connected through the extendable portion, and the extendable portion has a certain extendability. Even if the circuit board structure is applied to a curved display device, deformation or dislocation occurs, the extendable portion can absorb the stress generated by the bending of the circuit board structure, and will not transmit the stress to the switching circuit component or the display panel, which can prevent the glass substrate of the display panel from being subjected to stress to pull the liquid crystal molecules to cause light leakage, so as to improve the display effect of the display panel.

[0008] Among them, in the direction perpendicular to the circuit board structure, the shape of the extendable portion is a triangle, one side of the extendable portion is connected to one side of the first circuit component, and the boundary line between the first circuit component and the extendable portion includes an inclined line, and the inclined line is inclined relative to one side of the first circuit component.

[0009] Wherein, a boundary line between the first circuit component and the extendable portion comprises an arc line.

[0010] Among them, the number of the first circuit components is two, the two first circuit components are arranged at an interval to form a first interval, the number of the second circuit components is two, the two second circuit components are arranged at an interval to form a second interval, the first interval and the second interval are arranged correspondingly, and the extendable component forms a flexible connection portion at the position corresponding to the first interval and the second interval.

[0011] Wherein, the extensible part includes a first surface and a second surface opposite to each other, a plurality of first grooves are provided on the first surface, and a plurality of second grooves are provided on the second surface; the flexible connection part includes a third surface and a fourth surface opposite to each other, a plurality of third grooves are provided on the third surface, and a plurality of fourth grooves are provided on the fourth surface.

[0012] Wherein, the circuit board structure includes a preset element and a first connecting line and a second connecting line respectively connecting two ends of the preset element, and the preset element and the extendable component are arranged in the same layer;

[0013] The first circuit component has at least one first hollow-out portion, and the second circuit component has at least one second hollow-out portion, the first hollow-out portion and the second hollow-out portion correspond one to one, and the extendable component forms a first buffer portion corresponding to the position of one of the first hollow-out portion and one of the second hollow-out portion; the first circuit component has at least one third hollow-out portion, and the second circuit component has at least one fourth hollow-out portion, the third hollow-out portion and the fourth hollow-out portion correspond one to one, and the extendable component forms a second buffer portion corresponding to the position of one of the third hollow-out portion and one of the fourth hollow-out portion; wherein, the first connecting wire and the second connecting wire are located in the first circuit component or the second circuit component, and the first connecting wire, the second connecting wire, the first buffer portion, and the second buffer portion are respectively arranged around the preset element.

[0014] Wherein, the first circuit component comprises a first solder resist layer, a first wiring layer, a first insulating adhesive layer, and a second wiring layer which are stacked in sequence, and the flexible substrate of the extensible component is arranged on the second wiring layer;

[0015] The second circuit component includes a second insulating adhesive layer, a third wiring layer, a third insulating adhesive layer, a fourth wiring layer, and a second solder resist layer which are stacked in sequence, and the second insulating adhesive layer is arranged on the stretchable conductive layer of the stretchable component.

[0016] Wherein, the material of the stretchable conductive layer includes polymer conductive material.

[0017] In a second aspect, the present application provides a display device, the display device comprising a plurality of switching circuit components and a plurality of circuit board structures, wherein one of the extendable portions of the circuit board structure is connected to one of the switching circuit components;

[0018] The display device further comprises a display panel, the plurality of circuit board structures comprise a connecting circuit board, the plurality of switching circuit components comprise at least one chip-on-film, and the chip-on-film is used to connect the display panel and the extendable portion of the connecting circuit board.

[0019] In the display device provided in the present application, the circuit board structure includes a first circuit component, an extendable component and a second circuit component which are stacked in sequence, the first circuit component has a first notch, the second circuit component has a second notch corresponding to the first notch, the extendable portion of the extendable component corresponding to the first notch and the second notch forms an extendable portion, the extendable portion of the circuit board structure is connected to the adapter circuit component and connected to the display panel through the adapter circuit component, the extendable portion has a certain extendability, even if the circuit board structure is applied to a curved display device and deformation or dislocation occurs, the extendable portion can absorb the stress generated by the bending of the circuit board structure, and will not transmit the stress to the adapter circuit component or the display panel, so as to avoid the glass substrate of the display panel being subjected to stress to pull the liquid crystal molecules and cause light leakage, thereby improving the display effect of the display device.

[0020] Among them, the plurality of switching circuit components include at least one flexible circuit board, and the plurality of circuit board structures further include a driving circuit board, and the flexible circuit board is respectively connected to the extendable portion of the connecting circuit board and the extendable portion of the driving circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of a display device provided in an embodiment of the present application. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of a circuit board structure provided in an embodiment of the present application. Figure 1 ;

[0024] Figure 3 This is a schematic diagram of a cross-sectional structure of a circuit board structure provided in an embodiment of the present application. Figure 1 ;

[0025] Figure 4 This is a schematic diagram of a circuit board structure provided in an embodiment of the present application. Figure 2 ;

[0026] Figure 5 This is a schematic diagram of a cross-sectional structure of a circuit board structure provided in an embodiment of the present application. Figure 2 ;

[0027] Figure 6 This is a schematic diagram of a circuit board structure provided in an embodiment of the present application. Figure 3 ;

[0028] Figure 7 is a schematic diagram of a cross-sectional structure of an extendable portion provided in an embodiment of the present application;

[0029] Figure 8 is a schematic diagram of the cross-sectional structure of a flexible connection portion provided in an embodiment of the present application;

[0030] Fig. 9 It is a structural schematic diagram of a preset component provided in a circuit board structure according to an embodiment of the present application;

[0031] Fig.10 This is a schematic diagram of a cross-sectional structure of a circuit board structure provided in an embodiment of the present application. Figure 3 ;

[0032] Fig.11 This is a schematic diagram of a display device provided in an embodiment of the present application. Figure 2 .

[0033] Description of labels:

[0034] Display device 1000, circuit board structure 100, main body 110, first circuit board 111, second circuit board 112, extendable part 120, first circuit component 10, first notch 101, first solder resist layer 11, first wiring layer 12, first insulating adhesive layer 13, second wiring layer 14, extendable component 20, flexible substrate 21, extendable conductive layer 22, reinforced conductive layer 23, first buffer part 24, second buffer part 25, second circuit component 30, second insulating adhesive layer 31, third wiring layer 32, third insulating adhesive layer 33, fourth wiring layer 34, second solder resist layer 35, second notch 301, flexible connecting part 40, preset element 50, first connecting line 61, second connecting line 62, transfer circuit component 200, flip chip film 201, flexible circuit board 202, display panel 300, connecting circuit board 130, driving circuit board 140. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In this specification, for the sake of convenience, the words and phrases indicating the orientation or positional relationship such as "middle", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like are used to illustrate the positional relationship of the constituent elements with reference to the drawings. This is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the orientation of the constituent elements being described. Therefore, it is not limited to the words and phrases described in the specification, and can be appropriately replaced according to the circumstances.

[0038] In this specification, 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 a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate, or the internal communication of two elements. For ordinary technicians in this field, the meanings of the above terms in this disclosure can be understood according to the circumstances.

[0039] In recent years, curved display devices have become increasingly popular among consumers due to their excellent visual experience, comfortable viewing experience and innovative design style.

[0040] A plurality of printed circuit boards are also required to be arranged in the curved display device, and the plurality of printed circuit boards are connected and driven to control the display panel through a switching circuit component (including a cover chip film, etc.) to realize normal display of the display panel. However, the printed circuit board cannot be bent normally. In the related art, when the printed circuit board is applied to the curved display device, it is easy to be deformed or misaligned, and the display panel is pulled through the switching circuit component, affecting the normal display panel.

[0041] Specifically, in actual design, the printed circuit board cannot be effectively bent. When the printed circuit board is applied to a curved display device, it is prone to deformation or misalignment, and stress is applied to the glass substrate of the display panel through the switching circuit components. The liquid crystal molecules on the glass substrate will also be squeezed due to the stress of the glass substrate, causing the arrangement direction of the liquid crystal molecules to change, thereby causing light leakage and affecting the normal operation of the display panel.

[0042] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of a display device provided in an embodiment of the present application. Figure 1 , Figure 2 This is a schematic diagram of a circuit board structure provided in an embodiment of the present application. Figure 1 , Figure 3 This is a schematic diagram of a cross-sectional structure of a circuit board structure provided in an embodiment of the present application. Figure 1 The present application provides a circuit board structure 100, which can be applied to a display device 1000 to solve the technical problems in the related art that a printed circuit board is easily deformed or misaligned when applied to a curved display device, and the display panel is pulled by a switching circuit component, thereby affecting the normal phenomenon of the display panel.

[0043] The circuit board structure 100 includes a first circuit component 10, a stretchable component 20 and a second circuit component 30 stacked in sequence, the stretchable component 20 includes a flexible substrate 21 and a stretchable conductive layer 22 stacked in sequence, the flexible substrate 21 is arranged on the first circuit component 10, and the stretchable conductive layer 22 is arranged on the side of the flexible substrate 21 away from the first circuit component 10.

[0044] Among them, the first circuit component 10 has at least one first notch 101, the second circuit component 30 has at least one second notch 301, the first notch 101 and the second notch 301 correspond one to one, and the extendable component 20 forms an extendable portion 120 corresponding to the position of one first notch 101 and one second notch 301, and the extendable portion 120 is used to connect the adapter circuit component 200.

[0045] The ductility of the ductile component 20 is better than that of the first circuit component 10 and the second circuit component 30. In other words, the elastic modulus of the ductile component 20 is smaller than that of the first circuit component 10 and the second circuit component 30, that is, the ability of the ductile component 20 to resist deformation when subjected to external force is weaker than that of the first circuit component 10 and the second circuit component 30. In addition, the ductile component 20 includes ductile material, and the ductile component 20 can produce a certain ductile deformation when subjected to external force.

[0046] Specifically, the extensible component 20 includes a flexible substrate 21, and the material of the flexible substrate 21 is flexible. Optionally, the flexible substrate 21 can be made of any one or more of the following materials: polyimide, polyethylene terephthalate (PET), polyethylene naphthalate diformic acid glycol estr (PEN), cycloolefin polymer (COP), polycarbonate (PC), polystyrene (PS), polypropylene (PP), and polytetrafluoroethylene (PTFE).

[0047] Furthermore, the ductile component 20 further comprises the ductile conductive layer 22, the ductile conductive layer 22 has certain ductility and conductivity, the ductile conductive layer 22 connects the first circuit component 10 and the second circuit component 30 through vias, and can be used to transmit electrical signals of the first circuit component 10 and the second circuit component 30. The material of the ductile conductive layer 22 comprises a polymer conductive material, and optionally, the ductile conductive layer 22 can be made of any one or more of the following materials: polyaniline (PANI), polypyrrole (PPy), polythiophene (PT) and their derivatives.

[0048] The extensible component 20 includes the flexible substrate 21 and the extensible conductive layer 22. The materials of the flexible substrate 21 and the extensible conductive layer 22 both have certain extensibility, so that the extensible component 20 also has certain extensibility.

[0049] The circuit board structure 100 further includes the first circuit component 10 and the second circuit component 30, which are arranged on both sides of the extendable component 20. The first circuit component 10 has at least one first notch 101, and the second circuit component 30 has at least one second notch 301. The first notch 101 and the second notch 301 correspond to each other. The extendable component 20 forms an extendable portion 120 corresponding to one first notch 101 and one second notch 301. The extendable portion 120 is used to connect the switching circuit component 200. Specifically, the two sides of one extendable portion 120 are respectively one first notch 101 and one second notch 301. In other words, the extendable portion 120 is the portion of the extendable component 20 that exposes the first notch 101 and the second notch 301.

[0050] Furthermore, in order to decompose the circuit board structure 100 in more detail, the circuit board structure 100 may include a main body portion 110 and the extendable portion 120. Figure 3 As shown, the main body 110 includes the first circuit component 10, the second circuit component 30 and part of the extendable component 20, and the extendable portion 120 only includes the extendable component 20. In other words, a part of the extendable component 20 is located in the main body 110, and another part of the extendable component 20 is located in the first notch 101 and the second notch 301 and forms the extendable portion 120. In other words, the part of the extendable component 20 located in the main body 110 and the extendable portion 120 form the extendable component 20.

[0051] The circuit board structure 100 includes a main body 110 and an extendable part 120. The main body 110 includes the first circuit component 10, the second circuit component 30 and part of the extendable component 20. The first circuit component 10 and the second circuit component 30 can be used for wiring and installing electronic components to ensure that the basic functions of the circuit board structure 100 can be realized. The extendable part 120 can be used to connect the switching circuit component 200. The extendable part 120 only includes a part of the extendable component 20 and does not include the first circuit component 10 and the second circuit component 30. In addition, the extendable component 20 has a certain extendability, and the extendable part 120 has a certain extendability. The adapter circuit component 200 is connected via the extendable portion 120. When the circuit board structure 100 is applied to a curved display device 1000, even if the main body portion 110 is deformed or misaligned, only the extendable portion 120 will be pulled and stretched. That is, the extendable portion 120 can absorb the stress generated by the bending of the circuit board structure 100, and will not transmit the stress to the adapter circuit component 200 or the display panel 300. This can prevent the glass substrate of the display panel 300 from being subjected to stress and pulling the liquid crystal molecules to cause light leakage, thereby improving the display effect of the display panel 300.

[0052] In the circuit board structure 100 provided in the present application, the first circuit component 10, the extendable component 20 and the second circuit component 30 are stacked in sequence, the first circuit component 10 has at least one first notch 101, the second circuit component 30 has at least one second notch 301, the first notch 101 and the second notch 301 correspond one to one, and the extendable component 20 forms an extendable portion 120 corresponding to the position of one of the first notches 101 and one of the second notches 301, and the extendable portion 120 is used to connect the adapter circuit component 200. The adapter circuit component 200 is connected via the extendable portion 120, and the extendable portion 120 has a certain degree of extendibility. Even if the circuit board structure 100 is deformed or misaligned when applied to the curved display device 1000, the extendable portion 120 can absorb the stress generated by the bending of the circuit board structure 100, and will not transmit the stress to the adapter circuit component 200 or the display panel 300, thereby preventing the glass substrate of the display panel 300 from being subjected to stress and pulling the liquid crystal molecules to cause light leakage, thereby improving the display effect of the display panel 300.

[0053] Optionally, the present application does not limit the connection method between the adapter circuit component 200 and the extendable portion 120. In this embodiment, the adapter circuit component 200 can be directly welded and bound to the extendable portion 120. In other embodiments, the adapter circuit component 200 can also be connected to the extendable portion 120 in other ways, which should not be understood as a limitation to the present application.

[0054] For further information, please refer to Figures 1 to 3 In one embodiment, the stretchable component 20 also includes the reinforced conductive layer 23, and the reinforced conductive layer 23 and the stretchable conductive layer 22 are both arranged on the flexible substrate 21, and the reinforced conductive layer 23 is arranged between the stretchable conductive layer 22 and the flexible substrate 21.

[0055] The reinforcing conductive layer 23 can be used to enhance the conductivity and signal transmission performance of the extendable component 20, and further enhance the conductivity and signal transmission performance of the extendable portion 120, so that the extendable portion 120 can effectively transmit the signal of the circuit board structure 100 to the switching circuit component 200. Optionally, the material of the reinforcing conductive layer 23 includes but is not limited to conductive metals such as copper, silver, gold, or other conductive materials.

[0056] Please refer to Figures 1 to 3 In one embodiment, in a direction perpendicular to the circuit board structure 100, the shape of the extendable portion 120 is a triangle, one side of the extendable portion 120 is connected to one side of the first circuit component 10, and the boundary line between the first circuit component 10 and the extendable portion 120 includes an inclined line, and the inclined line is inclined relative to one side of the first circuit component 10.

[0057] It should be noted that the extendable portion 120 is the portion of the extendable component 20 that leaks out from the first notch 101 and the second notch 301, that is, the shape of the extendable portion 120 corresponds to the shape of the first notch 101 and the second notch 301. The shape of the first notch 101 corresponds to the shape of the second notch 301, and in the direction perpendicular to the circuit board structure 100, the shapes of the first notch 101 and the second notch 301 correspond and are triangular, so that the shape of the extendable portion 120 is triangular.

[0058] In the direction perpendicular to the circuit board structure 100, the shape of the extendable portion 120 is a triangle, and one side of the extendable portion 120 is connected to one side of the first circuit component 10, that is, the first side of the triangle is parallel to one side of the first circuit component 10, and the boundary line between the first circuit component 10 and the extendable portion 120 is two sides of the triangle, and the two sides of the triangle are arranged at an angle to the first side, that is, the boundary line between the first circuit component 10 and the extendable portion 120 is inclined relative to one side of the first circuit component 10. In other words, the boundary line between the main body 110 and the extendable portion 120 is inclined relative to one side of the first circuit component 10. It should be noted that when the extendable portion 120 is subjected to a force along the Y direction, the boundary line between the main body 110 and the extendable portion 120 is inclined relative to one side of the first circuit component 10, which can extend the length of the boundary line between the main body 110 and the extendable portion 120, thereby reducing the average stress received by each position at the connection between the main body 110 and the extendable portion 120, and improving the force-bearing capacity and tensile strength of the extendable portion 120.

[0059] Please refer to Figures 1 to 4 , Figure 4 This is a schematic diagram of a circuit board structure provided in an embodiment of the present application. Figure 2 In one embodiment, the boundary line between the first circuit component 10 and the extendable portion 120 includes an arc line. In other words, the boundary line between the main body 110 and the extendable portion 120 is an arc line, which can further extend the length of the boundary line between the main body 110 and the extendable portion 120, thereby reducing the average stress received by each position at the connection between the main body 110 and the extendable portion 120, and improving the force bearing capacity and tensile strength of the extendable portion 120.

[0060] Please refer to Figures 1 to 6 , Figure 5 This is a schematic diagram of a cross-sectional structure of a circuit board structure provided in an embodiment of the present application. Figure 2 , Figure 6 This is a schematic diagram of a circuit board structure provided in an embodiment of the present application. Figure 3 In one embodiment, the number of the first circuit components 10 is two, the two first circuit components 10 are arranged at intervals to form a first interval, the number of the second circuit components 30 is two, the two second circuit components 30 are arranged at intervals to form a second interval, the first interval and the second interval are arranged correspondingly, and the flexible connecting portion 40 is formed at positions of the extendable component 20 corresponding to the first interval and the second interval.

[0061] In other words, the circuit board structure 100 may include a first circuit board 111 and a second circuit board 112, the first first circuit component 10, the first second circuit component 30, and the extendable component 20 between the first first circuit component 10 and the first second circuit component 30 form the first circuit board 111, the second second circuit component 30, the second second circuit component 30, and the extendable component 20 between the second first circuit component 10 and the second second circuit component 30 form the second circuit board 112, the exposed portion of the extendable component 20 relative to the first interval and the second interval is the flexible connection portion 40, and the first circuit board 111 and the second circuit board 112 are connected through the flexible connection portion 40. In other words, the flexible connection portion 40 and the extendable component 20 are an integral structure, that is, the first circuit board 111, the flexible connection portion 40 and the second circuit board 112 can be prepared by a circuit board process, and when the circuit board structure 100 needs to be configured as a plurality of circuit boards, it is convenient to directly connect the plurality of circuit boards and simplify the process flow.

[0062] It should be noted that the circuit board structure 100 may include the first circuit board 111 and the second circuit board 112, and the first circuit board 111 and the second circuit board 112 may both be provided with the extendable portion 120, and the first circuit board 111 and the second circuit board 112 are connected via the flexible connection portion 40, and the flexible connection portion 40 may be bent, which may improve the bending performance of the circuit board structure 100, and is conducive to applying the circuit board structure 100 to the curved display device 1000.

[0063] Optionally, the number of the first circuit components 10 and the number of the second circuit components 30 can be multiple. For example, the number of the first circuit components 10 and the number of the second circuit components 30 can be three, or four, or five, or more than five, and the present application does not impose any restrictions on this. In other words, the circuit board structure 100 can also include a third circuit board, a fourth circuit board, a fifth circuit board or even more circuit boards, and the flexible connecting portion 40 is provided between two adjacent circuit boards. The above all belong to implementation modes of the present application and should not be understood as limitations on the present application.

[0064] Please refer to Figure 7 , Figure 7 1 is a schematic diagram of a cross-sectional structure of an extendable portion provided in an embodiment of the present application. In one embodiment, the extendable portion 120 includes a first surface and a second surface facing each other, a plurality of first grooves are provided on the first surface, and a plurality of second grooves are provided on the second surface.

[0065] Furthermore, the plurality of first grooves on the first surface and the plurality of second grooves on the second surface are arranged alternately, so that the cross-sectional shape of the extendable portion 120 is a corrugated shape. The cross-sectional shape of the extendable portion 120 is a corrugated shape. In other words, the extendable portion 120 can be stretched to a certain distance, which is conducive to extending the stretching length of the extendable portion 120, further improving the stress range that the extendable portion 120 can absorb, and is conducive to improving the bending stress that the circuit board structure 100 can withstand when applied to the curved display device 1000.

[0066] Please refer to Figure 8 , Figure 8 2 is a schematic diagram of a cross-sectional structure of a flexible connection portion provided in an embodiment of the present application. Similarly, in one embodiment, the flexible connection portion 40 includes a third surface and a fourth surface facing each other, the third surface is provided with a plurality of third grooves, and the fourth surface is provided with a plurality of fourth grooves.

[0067] Furthermore, the plurality of third grooves on the third surface and the plurality of fourth grooves on the fourth surface are arranged alternately, so that the cross-sectional shape of the flexible connection part 40 is a corrugated shape. The cross-sectional shape of the flexible connection part 40 is a corrugated shape. In other words, the flexible connection part 40 can be stretched to a certain distance, which is conducive to extending the stretching length of the flexible connection part 40, further improving the stress range that the flexible connection part 40 can absorb, and is conducive to improving the bending stress that the circuit board structure 100 can withstand when applied to the curved display device 1000.

[0068] In the related art, when capacitors and inductors are provided on the circuit board, the howling of the capacitors and inductors will generate certain noise. The reason for the howling of the inductor is that in the power inductor of the DC-DC converter, when the alternating current and pulse waves of the frequency in the audible range of the human ear (20Hz~20kHz) flow through it, the inductor body will vibrate. This phenomenon is called "coil noise" and is sometimes heard as a howling phenomenon. The reason for the howling of the capacitor is that after the capacitor is energized, an electric field force is generated; the capacitor expands slightly under the action of the electric field force; if the ripple on the capacitor is too large, the change in the electric field force is also relatively large; the changing electric field force is applied to the circuit board, causing vibration; if the ripple frequency is within the range of human hearing, the sound of the capacitor can be heard.

[0069] Please refer to Figure 3 and Fig. 9 , Fig. 9The schematic diagram of the structure of a preset element provided in a circuit board structure according to an embodiment of the present application is shown in FIG. In one embodiment, the circuit board structure 100 includes a preset element 50 and a first connecting line 61 and a second connecting line 62 respectively connecting two ends of the preset element 50, and the preset element 50 is arranged in the same layer as the extendable component 20.

[0070] The first circuit component 10 has at least one first hollow portion, and the second circuit component 30 has at least one second hollow portion, and the first hollow portion and the second hollow portion correspond one to one, and the extendable component 20 forms a first buffer portion 24 corresponding to the position of one of the first hollow portion and one of the second hollow portion; the first circuit component 10 has at least one third hollow portion, and the second circuit component 30 has at least one fourth hollow portion, and the third hollow portion and the fourth hollow portion correspond one to one, and the extendable component 20 forms a second buffer portion 25 corresponding to the position of one of the third hollow portion and one of the fourth hollow portion; wherein, the first connecting line 61 and the second connecting line 62 are located in the first circuit component 10 or the second circuit component 30, and the first connecting line 61, the second connecting line 62, the first buffer portion 24, and the second buffer portion 25 are respectively arranged around the preset element 50.

[0071] The preset element 50 includes a capacitor and / or an inductor. The first buffer portion 24 and the second buffer portion 25 are both part of the extensible component 20, and the first buffer portion 24 and the second buffer portion 25 have certain flexibility and extensibility. The first buffer portion 24 and the second buffer portion 25 are respectively arranged at both ends of the preset element 50, which is beneficial to buffering the vibration generated by the preset element 50 and preventing the preset element 50 from transmitting the vibration to the first circuit component 10 and the second circuit component 30 to generate noise, which is beneficial to eliminating the noise generated when the capacitor and inductor are arranged on the circuit board structure 100, thereby improving the product performance of the circuit board structure 100.

[0072] Furthermore, the first connecting line 61 and the second connecting line 62 are located in the first circuit component 10 or the second circuit component 30 , which is beneficial to improving the connection firmness and reliability between the preset element 50 and the first circuit component 10 or the second circuit component 30 .

[0073] Please refer to Figure 3 and Fig.10 , Fig.10 This is a schematic diagram of a cross-sectional structure of a circuit board structure provided in an embodiment of the present application. Figure 3In one embodiment, the first circuit component 10 includes a first solder resist layer 11 , a first wiring layer 12 , a first insulating adhesive layer 13 , and a second wiring layer 14 which are stacked in sequence, and the flexible substrate 21 of the extensible component 20 is disposed on the second wiring layer 14 .

[0074] The second circuit component 30 includes a second insulating adhesive layer 31 , a third wiring layer 32 , a third insulating adhesive layer 33 , a fourth wiring layer 34 , and a second solder resist layer 35 which are stacked in sequence. The second insulating adhesive layer 31 is disposed on the stretchable conductive layer 22 of the stretchable component 20 .

[0075] The first solder resist layer 11 and the second solder resist layer 35 are respectively arranged on both sides of the circuit board structure 100. The first solder resist layer 11 and the second solder resist layer 35 are used to define and distinguish the non-solderable areas of the circuit board structure 100. The first solder resist layer 11 and the second solder resist layer 35 can be used to protect the first wiring layer 12 and the second wiring layer 14 from mechanical damage such as oxidation, and avoid problems such as welding short circuits in the circuit board structure 100.

[0076] The first routing layer 12, the second routing layer 14, the third routing layer 32, and the fourth routing layer 34 are conductive layers that can be used to transmit electrical signals. Optionally, the first routing layer 12, the second routing layer 14, the third routing layer 32, and the fourth routing layer 34 are made of copper or other conductive metals.

[0077] The first insulating adhesive layer 13 can be used to isolate and bond the first wiring layer 12 and the second wiring layer 14, the second insulating adhesive layer 31 can be used to isolate and bond the third wiring layer 32 and the extensible component 20, and the third insulating adhesive layer 33 can be used to isolate and bond the third wiring layer 32 and the fourth wiring layer 34. In this embodiment, the first insulating adhesive layer 13, the second insulating adhesive layer 31 and the third insulating adhesive layer 33 all include an adhesive layer and an insulating layer. In other embodiments, the first insulating adhesive layer 13, the second insulating adhesive layer 31 and the third insulating adhesive layer 33 can also be a semi-cured layer (Prepreg, PP), which is not limited in this application.

[0078] Please refer to Figures 1 to 3 The present application provides a display device 1000, which includes the circuit board structure 100, the display panel 300 and the adapter circuit component 200, wherein the adapter circuit component 200 is electrically connected to the circuit board structure 100 and the display panel 300 respectively, and the circuit board structure 100 is connected to and drives and controls the display panel 300 through the adapter circuit component 200.

[0079] In the display device 1000 provided in the present application, the circuit board structure 100 includes the first circuit component 10, the extendable component 20 and the second circuit component 30 which are stacked in sequence, the first circuit component 10 has the first notch 101, the second circuit component 30 has the second notch 301 corresponding to the first notch 101, the extendable component 20 forms the extendable portion 120 at the position corresponding to the first notch 101 and the second notch 301, and the extendable portion 120 of the circuit board structure 100 is connected to the switching circuit component 200. The display panel 300 is connected via the adapter circuit component 200. The extendable portion 120 has a certain degree of ductility. Even if the circuit board structure 100 is deformed or misaligned when applied to the curved display device 1000, the extendable portion 120 can absorb the stress generated by the bending of the circuit board structure 100 and will not transmit the stress to the adapter circuit component 200 or the display panel 300. This can prevent the glass substrate of the display panel 300 from being subjected to stress and pulling the liquid crystal molecules to cause light leakage, thereby improving the display effect of the display device 1000.

[0080] Please refer to Figures 1 to 11 , Fig.11 This is a schematic diagram of a display device provided in an embodiment of the present application. Figure 2 In one embodiment, when the size of the display device 1000 is relatively large, the number of the circuit board structures 100 is multiple, and the multiple circuit board structures 100 include multiple connecting circuit boards 130 and a driving circuit board 140 , and the driving circuit board 140 controls the display panel 300 through the multiple connecting circuit boards 130 .

[0081] The plurality of switching circuit components 200 include at least one chip-on-film 201 , and the chip-on-film 201 is used to connect the display panel 300 and the extendable portion 120 of the connection circuit board 130 .

[0082] In the related art, when two adjacent connection circuit boards need to be connected, a flexible circuit board needs to be provided for the connection.

[0083] In this application, if Fig.11 As shown, the connection circuit board 130 can be directly split into two circuit boards, and the two circuit boards are connected by the flexible connection part 40, so as to achieve the purpose of setting two connected connection circuit boards in the related art. In addition, the two circuit boards can be prepared by one circuit board process, simplifying the process flow and saving time.

[0084] In the related art, the connecting circuit board and the driving circuit board are connected through a flexible circuit board, and when the flexible circuit board is connected, two connectors need to be welded on the connecting circuit board and the driving circuit board, and the flexible circuit board needs to be inserted to connect the connecting circuit board and the driving circuit board.

[0085] Please refer to Figures 1 to 11 The plurality of switching circuit components 200 include at least one flexible circuit board 202 , and the flexible circuit board 202 is respectively connected to the extendable portion 120 of the connecting circuit board 130 and the extendable portion 120 of the driving circuit board 140 .

[0086] The flexible circuit board 202 can be directly welded and bound to the extendable portion 120 of the connecting circuit board 130 and the extendable portion 120 of the driving circuit board 140, which can save the use of materials such as connectors and the flexible circuit board 202 and reduce the preparation cost.

[0087] Mentioning "embodiment" and "implementation method" in this application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrases in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures or characteristics described in the various embodiments of the present application can be arbitrarily combined to form another embodiment that does not deviate from the spirit and scope of the technical solution of the present application, provided that there is no contradiction between them.

[0088] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A circuit board structure, characterized in that: The circuit board structure is applied to a display device, the circuit board structure comprises a first circuit component, an extendable component and a second circuit component which are stacked in sequence, the extendable component comprises a flexible substrate and an extendable conductive layer which are stacked in sequence, the flexible substrate is arranged on the first circuit component, and the extendable conductive layer is arranged on a side of the flexible substrate away from the first circuit component; Among them, the first circuit component has at least one first notch, the second circuit component has at least one second notch, the first notch and the second notch correspond one to one, and the extendable component forms an extendable part corresponding to the position of one first notch and one second notch, and the extendable part is used to connect the adapter circuit component.

2. The circuit board structure according to claim 1, characterized in that: In the direction perpendicular to the circuit board structure, the shape of the extendable portion is a triangle, one side of the extendable portion is connected to one side of the first circuit component, and the boundary line between the first circuit component and the extendable portion includes an inclined line, which is inclined relative to one side of the first circuit component.

3. The circuit board structure according to claim 1, characterized in that: A boundary line between the first circuit component and the extendable portion includes an arc line.

4. The circuit board structure according to claim 1, characterized in that: The number of the first circuit components is two, and the two first circuit components are spaced apart to form a first interval. The number of the second circuit components is two, and the two second circuit components are spaced apart to form a second interval. The first interval and the second interval are arranged correspondingly, and the extendable component forms a flexible connection portion corresponding to the position of the first interval and the second interval.

5. The circuit board structure according to claim 4, characterized in that: The extensible portion includes a first surface and a second surface opposite to each other, a plurality of first grooves are provided on the first surface, and a plurality of second grooves are provided on the second surface; the flexible connecting portion includes a third surface and a fourth surface opposite to each other, a plurality of third grooves are provided on the third surface, and a plurality of fourth grooves are provided on the fourth surface.

6. The circuit board structure according to claim 1, characterized in that: The circuit board structure includes a preset element and a first connecting line and a second connecting line respectively connecting two ends of the preset element, and the preset element and the extendable component are arranged in the same layer; The first circuit component has at least one first hollow-out portion, and the second circuit component has at least one second hollow-out portion, the first hollow-out portion and the second hollow-out portion correspond one to one, and the extendable component forms a first buffer portion corresponding to the position of one of the first hollow-out portion and one of the second hollow-out portion; the first circuit component has at least one third hollow-out portion, and the second circuit component has at least one fourth hollow-out portion, the third hollow-out portion and the fourth hollow-out portion correspond one to one, and the extendable component forms a second buffer portion corresponding to the position of one of the third hollow-out portion and one of the fourth hollow-out portion; wherein, the first connecting wire and the second connecting wire are located in the first circuit component or the second circuit component, and the first connecting wire, the second connecting wire, the first buffer portion, and the second buffer portion are respectively arranged around the preset element.

7. The circuit board structure according to claim 1, characterized in that: The first circuit component comprises a first solder resist layer, a first wiring layer, a first insulating adhesive layer, and a second wiring layer which are stacked in sequence, and the flexible substrate of the extensible component is arranged on the second wiring layer; The second circuit component includes a second insulating adhesive layer, a third wiring layer, a third insulating adhesive layer, a fourth wiring layer, and a second solder resist layer which are stacked in sequence, and the second insulating adhesive layer is arranged on the stretchable conductive layer of the stretchable component.

8. The circuit board structure according to claim 1, characterized in that: The material of the extensible conductive layer includes a polymer conductive material.

9. A display device, characterized in that: It comprises a plurality of switching circuit components and a plurality of circuit board structures according to any one of claims 1 to 8, wherein one of the extendable parts of the circuit board structure is connected to one of the switching circuit components; The display device further comprises a display panel, the plurality of circuit board structures comprise a connecting circuit board, the plurality of switching circuit components comprise at least one chip-on-film, and the chip-on-film is used to connect the display panel and the extendable portion of the connecting circuit board.

10. The display device according to claim 9, characterized in that: The plurality of switching circuit components include at least one flexible circuit board, and the plurality of circuit board structures further include a driving circuit board, wherein the flexible circuit boards are respectively connected to the extendable portion of the connecting circuit board and the extendable portion of the driving circuit board.

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