Telescopic flexible flat cable and electronic device including same

Abstract

Embodiments disclosed herein relate to a retractable cable and an electronic device for transmitting high speed signals. To this end, the cable may include a retractable circuit board to which one end of a first printed circuit board is coupled through a first pad member, and to which one end of a second printed circuit board is coupled through a second pad member, and the telescopic circuit board is configured to be stretched in a length direction that pulls the first pad member and the second pad member apart from each other by an external force. Various other embodiments are possible.

Description

Technical Field

[0001] The present disclosure relates to a scalable flexible flat panel cable for providing high-speed signal transmission, and an electronic device including the same. Background Art

[0002] Electronic devices (such as smart phones, tablet computers or computers) are becoming smaller, thinner or more versatile. These electronic devices may include electronic components mounted or connected to a printed circuit board (PCB) or a flexible printed circuit board (FPCB), such as a processor, a memory, a speaker, a microphone, a sensor, a camera, an antenna or a communication module. The PCB or FPCB may include a cable for connecting the above electronic components to each other.

[0003] In addition, with the development of display technology, research and development of electronic devices having flexible displays have been actively carried out. A flexible display refers to a display that can be folded, bent, curled or unfolded, and is sometimes also referred to as a foldable or curlable display.

[0004] Due to the reduction in size or thickness, there may be internal space limitations in electronic devices. In this case, it may be advantageous to use a flexible cable that is relatively thinner than a coaxial cable in the electronic device. In one example, the flexible cable may be a flexible flat cable (FFC). By providing a certain degree of flexibility, the flexible cable can provide various options for installation in an electronic device. The flexibility provided by such a flexible cable may have a flexible characteristic of bending or folding in a direction perpendicular to its extending direction. However, it is difficult for the flexible cable to provide a flexible characteristic that can be stretched in the horizontal direction (i.e., its longitudinal direction). Therefore, when the flexible cable is bent to a small radius of curvature, cracking may occur. Summary of the Invention

[0005] Technical Problem Embodiments of the present disclosure may provide a flexible cable configured to include a scalable section capable of extending in a longitudinal direction, and an electronic device applying such a flexible cable.

[0006] Technical Solution A cable according to an embodiment of the present disclosure may include: a stretchable circuit board configured to be stretched in a length direction in which a first pad member and a second pad member move away from each other by an external force, wherein one end of a first printed circuit board is joined through the first pad member, and one end of a second printed circuit board is joined through the second pad member. The stretchable circuit board may include a plurality of wiring members configured to be stretched by an external force, and one side and the other side of the plurality of wiring members are electrically coupled to the first pad member and the second pad member, respectively, on an upper surface of a dielectric member provided inside a covering member, wherein the plurality of wiring members may be arranged to be spaced apart from each other at a predetermined interval in a width direction perpendicular to the length direction.

[0007] An electronic device according to an embodiment of the present disclosure may include: a display, a housing, at least one bracket, at least one substrate, at least one cable for connecting at least one substrate or connecting electronic components provided on at least one substrate, and a rear cover. Here, the at least one cable may include a cable stretched in a predetermined direction. The cable stretched in the predetermined direction may include a stretchable circuit board configured to be stretched in a length direction in which a first pad member and a second pad member move away from each other by an external force, wherein one end of a first printed circuit board is joined through the first pad member, and one end of a second printed circuit board is joined through the second pad member. The stretchable circuit board may include a plurality of wiring members configured to be stretched by an external force, and one side and the other side of the plurality of wiring members are electrically coupled to the first pad member and the second pad member, respectively, on an upper surface of a dielectric member (210) provided inside a covering member, wherein the plurality of wiring members may be arranged to be spaced apart from each other at a predetermined interval in a width direction perpendicular to the length direction.

[0008] Advantageous Effects According to an embodiment of the present disclosure, to achieve high-speed signal transmission in an electronic device, the durability can be improved by allowing a flexible cable connecting electronic components to be at least partially bent or stretched.

[0009] The technical problems to be solved by the present disclosure are not limited to the above problems, and those having ordinary knowledge in the technical field to which the exemplary embodiments belong can derive other technical problems not mentioned above from the exemplary embodiments of the present disclosure.

[0010] Those having ordinary knowledge in the technical field to which the exemplary embodiments of the present disclosure belong can obtain and understand the effects that can be achieved by the exemplary embodiments of the present disclosure according to the following description. In other words, unexpected effects can be obtained when those having ordinary knowledge in the technical field to which the exemplary embodiments belong implement the exemplary embodiments of the present disclosure. Description of the Drawings

[0011] Figure 1 is a front view of a cable according to an embodiment.

[0012] Figure 2 is an enlarged view (e.g., Figure 1 Part I) of a portion of the cable and a cross-sectional view taken along line A - A' in the width direction.

[0013] Figure 3 is an enlarged view and a cross-sectional view of a portion of the second wiring member (e.g., Figure 2 the second wiring member) of the cable before the cable is stretched.

[0014] Figure 4 is an enlarged view (e.g., Figure 1 Part I) of a portion of the cable and a cross-sectional view taken along line B - B' in the length direction.

[0015] Figure 5 is a perspective view of the cable before and after being stretched according to an embodiment.

[0016] Figure 6 is a transverse cross-sectional view of the retractable circuit board before being stretched and a transverse cross-sectional view of the retractable circuit board after being stretched according to an embodiment.

[0017] Figure 7 is an enlarged view of a portion of a transverse cross-sectional view (e.g., Figure 6 Part III) according to an embodiment.

[0018] Figure 8 is a longitudinal cross-sectional view of the retractable circuit board before being stretched and a longitudinal cross-sectional view of the retractable circuit board after being stretched according to an embodiment.

[0019] Figure 9 is an exploded perspective view of the electronic device 1 according to an embodiment.

[0020] Regarding the description of the drawings, the same or similar reference numerals may be used for the same or similar components. Detailed Description of the Invention

[0021] The embodiments of the present disclosure will be described below with reference to the accompanying drawings, so that those with ordinary knowledge in the technical field to which the exemplary embodiments belong (hereinafter referred to as "those skilled in the art") can easily implement the invention of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Regarding the description of the drawings, the same or similar reference numerals can be used for the same or similar components. In addition, in the drawings and their related descriptions, the description of well-known functions and configurations may be omitted for clarity and brevity.

[0022] Considering the functions of the present disclosure, as used herein, the terms used in this document have been selected as general terms that are currently widely or likely to be used, but these terms may vary depending on the intentions of those skilled in the art, precedents, or the emergence of new technologies. Therefore, the terms used in this document should be defined based on the meaning of the terms and the overall content of the present disclosure, rather than simply based on the names of the terms.

[0023] In the embodiments of the present disclosure, when a specific part is described as "including or comprising" a component, this means that the part may also include other components, rather than excluding other components, unless otherwise specifically stated.

[0024] The term "... unit" or "... module" used in the embodiments of the present disclosure may refer to a unit that processes at least one function or operation, which may be implemented in hardware, software, or firmware, or a combination of hardware, software, or firmware.

[0025] For ease of explanation, the terms "x-axis direction", "y-axis direction", or "z-axis direction" used in the present disclosure are defined based on the drawings, and the shape or position of each component is not limited by these terms.

[0026] The term "flexible" as described in the present disclosure can be understood as bending or folding in a direction not parallel to the x-y plane in an electronic component (e.g., a cable, a printed circuit board) extending in the x-y plane, and the term "stretchable" can be understood as stretching or shrinking in a direction parallel to the x-y plane in an electronic component extending in the x-y plane.

[0027] Figure 1 is a front view of a cable according to an embodiment.

[0028] Reference Figure 1 , the cable 100 may include an application to an electronic device (e.g., Figure 9at least one cable of the electronic device 1). For example, the cable 100 may include at least one of an RF cable, a connection cable, or a flexible flat cable (FFC) applied to the electronic device 1. In addition, the cable 100 may include a member for physically or electrically connecting electronic components constituting the electronic device 1. The cable 100 is not limited to the illustrated shape and may have various shapes according to the purpose applied to the electronic device 1.

[0029] According to an example, the cable 100 may have various dimensions in the length direction (X-axis direction), width direction (Y-axis direction), or height direction (Z-axis direction). The dimensions in the length direction, width direction, or height direction may be set in consideration of, for example, the impedance of the cable 100. The dimensions in the length direction, width direction, or height direction may be set in consideration of, for example, the distance between electronic components connected by the cable 100.

[0030] For example, the cable 100 may have a predetermined length in the length direction. For example, the predetermined length may be determined in consideration of the separation distance between electronic components constituting the electronic device 1.

[0031] For example, the cable 100 may have a predetermined width in the width direction. For example, the width may be determined in consideration of the speed of a signal transmitted between electronic components constituting the electronic device 1, the space inside the electronic device 1, or the impedance value of the cable 100.

[0032] For example, the cable 100 may have a predetermined height in the height direction. For example, the height may be determined in consideration of the speed of a signal transmitted between electronic components constituting the electronic device 1, the space inside the electronic device 1, or the impedance value of the cable 100.

[0033] According to an example, the cable 100 may include at least one stretchable section and at least one non-stretchable section. For example, at least one stretchable section may be formed by a stretchable printed circuit board 200. For example, at least one non-stretchable section may be formed by flexible printed circuit boards (FPCBs) 310 and 320.

[0034] According to an example, the cable 100 may include a joint portion in which a telescopic section and a non-telescopic section overlap. The joint portion may be, for example, a portion where the telescopic section and the non-telescopic section are joined for electrical coupling. When the joint portion included in the telescopic section and the joint portion included in the non-telescopic section face each other and are joined, the formed section may be referred to as a joint section. The joint section may correspond to the intersection of the telescopic section and the non-telescopic section. For example, a joint pad may be provided on the joint portion included in the telescopic section. For example, a joint pad may be provided on the joint portion included in the non-telescopic section. For example, by using an anisotropic conductive film (ACF) or a ball grid array (BGA), the joint pad of the telescopic section may be joined to the joint pad of the non-telescopic section.

[0035] According to an example, the cable 100 may include a first flexible printed circuit board (hereinafter referred to as the first FPCB) 310, a second flexible printed circuit board (hereinafter referred to as the second FPCB) 320, or a telescopic printed circuit board 200. One end 313 of the first FPCB 310 may be physically or electrically connected to one end of the telescopic printed circuit board 200. The other end 311 of the first FPCB 310 may be used as a terminal for inputting or outputting an electrical signal. One end 321 of the second FPCB 320 may be physically or electrically connected to the other end of the telescopic printed circuit board 200. The other end 323 of the second FPCB 320 may be used as a terminal for inputting or outputting an electrical signal. For example, one end or the other end of the telescopic printed circuit board 200 and one ends 313 and 323 of the first FPCB 310 or the second FPCB 320 may be physically connected to each other through pad members (for example, Figure 2 the first pad member 331 or the second pad member 333 in Figure 2 will be described in more detail.

[0036] According to an example, the stretchable printed circuit board 200 can extend in a predetermined direction. In other words, the stretchable printed circuit board 200 can have a relatively high elongation rate. For example, when the first FPCB 310 is pulled in the -x axis direction or the second FPCB 320 is pulled in the x axis direction, the stretchable printed circuit board 200 can extend in the length direction (e.g., -x axis or +x axis direction). Although not shown herein, when the stretchable printed circuit board 200 is pulled in the width direction (e.g., +y axis or -y axis direction), the stretchable printed circuit board 200 can extend in the width direction (e.g., +y axis or -y axis direction). Although not shown herein, when the stretchable printed circuit board 200 is pulled in the height direction (e.g., +z axis or -z axis direction), the stretchable printed circuit board 200 can extend in the height direction (e.g., +z axis or -z axis direction). That is to say, the stretchable printed circuit board 200 can be a circuit board having a predetermined elasticity that can extend to a threshold range. The longitudinal section provided by the stretchable printed circuit board 200 can be referred to as the stretchable section of the cable 100.

[0037] According to an example, the first FPCB 310 or the second FPCB 320 can be bent in a predetermined direction (e.g., +y axis or -y axis direction), but may be limited when extending in a predetermined direction (e.g., -x axis or +x axis direction). In other words, the first FPCB 310 or the second FPCB 320 can have relatively high flexibility, while its elongation rate can be relatively low. The longitudinal section provided by the first FPCB 310 or the second FPCB 320 can be referred to as the non-stretchable section of the cable 100.

[0038] According to an example, when no external force is applied, the stretchable printed circuit board 200 can have a length l1 and a width d1. Although not shown here, when no external force is applied, the stretchable printed circuit board 200 can have a height h1 (e.g., Figure 6 the height h1 in

[0039] For example, at least one of the cable 100 and the stretchable printed circuit board 200 can be implemented as a coplanar waveguide (hereinafter referred to as, CPW). For example, a signal transmission line (e.g., Figure 2 the second wiring member 260 of Figure 2The first wiring member 250) may be provided on the other side of the CPW. For example, the signal transmission line and the ground line may be provided on one side of the CPW. The signal transmission line and / or the ground line may be provided in a microstrip form on one surface of the CPW. The signal transmission line and / or the ground line may be provided on the CPW in a printed (coated) manner, for example. Hereinafter, based on the case where the signal transmission line and / or the ground line are provided together on one side of the CPW, the cable 100 or the retractable printed circuit board 200 of the present disclosure will be described. However, the following description of its operation and / or configuration may equally apply to the cable 100 or the retractable printed circuit board 200 in which the transmission line and / or the ground line are provided in another form.

[0040] Figure 2 is a magnified view (e.g., Figure 1 of a part of the cable 100) according to an embodiment of the present disclosure (e.g., Figure 1 part I) and a cross-sectional view taken along line A-A' in the width direction.

[0041] Refer to Figure 2 the magnified view, a part of the magnified cable 100 (e.g., Figure 1 part I) may include a retractable printed circuit board (e.g., Figure 1 the first FPCB 310) and a second FPCB (e.g., Figure 1 the second FPCB 320) provided in the cable 100 between them (e.g., Figure 1 the retractable printed circuit board 200). One end 201 of the retractable printed circuit board 200 may be physically or electrically connected to one end 313 of the first FPCB 310. The other end 203 of the retractable printed circuit board 200 may be physically or electrically connected to one end 321 of the second FPCB 320.

[0042] According to an example, one end 201 of the retractable printed circuit board 200 may be physically or electrically connected to one end 313 of the first FPCB 310 through the first pad member 331. The other end 203 of the retractable printed circuit board 200 may be physically or electrically connected to one end 321 of the second FPCB 320 through the second pad member 333. The first pad member 331 may be made of, for example, a conductive material (such as a metal material). The second pad member 333 may also be made of, for example, a conductive material (such as a metal material).

[0043] According to the example, the first pad member 331 or the second pad member 333 may have a predetermined area, which may be defined by a horizontal length and a vertical length. For example, the width of the first pad member 331 may be substantially smaller than the width corresponding to the vertical length of one end 313 of the first FPCB 310. Different from the illustration, the width of the first pad member 331 may have a vertical length substantially the same as the width corresponding to the vertical length of one end 313 of the first FPCB 310. The width of the first pad member 331 may be substantially larger than the width d1 of the flexible printed circuit board 200. Different from the illustration, the width of the first pad member 331 may be substantially smaller than or equal to the width d1 of the flexible printed circuit board 200. For example, the width of the second pad member 333 may be substantially smaller than the width corresponding to the vertical length of one end 321 of the second FPCB 320. Different from the illustration, the width of the second pad member 333 may have a vertical length substantially the same as the width corresponding to the vertical length of one end 321 of the second FPCB 320. The width of the second pad member 333 may be substantially larger than the width d1 of the flexible printed circuit board 200. Different from the illustration, the width of the second pad member 333 may be substantially smaller than or equal to the width d1 of the flexible printed circuit board 200.

[0044] For example, the first pad member 331 may be disposed on the upper surface near one end 313 of the first FPCB 310, or may be disposed on the lower surface near one end 201 of the flexible printed circuit board 200. The first pad member 331 may physically or electrically connect the upper surface near one end 313 of the first FPCB 310 to the lower surface near one end 201 of the flexible printed circuit board 200. The first pad member 331 may include at least one adhesive member.

[0045] For example, when the first pad member 331 is formed by one adhesive member, the lower surface of the first pad member 331 may physically or electrically connect to the upper surface of one end 313 of the first FPCB 310, and the upper surface of the first pad member 331 may physically or electrically connect to the lower surface of one end 201 of the flexible printed circuit board 200.

[0046] For example, when the first pad member 331 is formed by two adhesive members, one adhesive member may physically or electrically connect to the upper surface of one end 313 of the first FPCB 310, and the other adhesive member may physically or electrically connect to the lower surface of one end 201 of the flexible printed circuit board 200. The adhesive member connected to the upper surface at one end 313 of the first FPCB 310 may be connected to the adhesive member connected to the lower surface at one end 201 of the flexible printed circuit board 200.

[0047] According to the example, the second pad member 333 can be disposed on the upper surface near one end 321 of the second FPCB 320, and / or on the lower surface near the other end 203 of the flexible printed circuit board 200. The second pad member 333 can physically or electrically connect the upper surface of the end 321 near the second FPCB 320 and the lower surface of the other end 203 near the flexible printed circuit board 200. The second pad member 333 can include at least one adhesive member.

[0048] For example, when the second pad member 333 is constructed of one adhesive member, the lower surface of the second pad member 333 can physically or electrically connect to the upper surface of one end 321 of the second FPCB 320, and the upper surface of the second pad member 333 can physically or electrically connect to the lower surface of the other end 203 of the flexible printed circuit board 200.

[0049] For example, when the second pad member 333 is constructed of two adhesive members, one adhesive member can physically or electrically connect to the upper surface of one end 321 of the second FPCB 320, and the other adhesive member can physically or electrically connect to the lower surface of the other end 203 of the flexible printed circuit board 200. The adhesive member connected to the upper surface of the end 321 of the second FPCB 320 can be connected to the adhesive member connected to the lower surface of the other end 203 of the flexible printed circuit board 200.

[0050] According to the example, the first pad member 331 can connect the flexible printed circuit board 200 to the first FPCB 310 using either the ACF method or the BGA method. The second pad member 333 can connect the flexible printed circuit board 200 to the second FPCB 320 using either the ACF method or the BGA method.

[0051] For example, ACF - type bonding is a method of bonding target objects using a film in which a non - conductive adhesive and conductive particles are mixed. ACF - type bonding can provide a path through which electrical signals flow between the first FPCB 310 and the flexible printed circuit board 200 and / or between the flexible printed circuit board 200 and the second FPCB 320. Here, conductive particles can be generated by coating polymer particles with a metal material including, for example, gold (Au), nickel (Ni), or palladium (Pd). For example, the diameter of the conductive particles can be 3 to 15 micrometers (um). For example, the volume of the conductive particles can account for 0.5% to 5% of the total volume of the ACF.

[0052] For example, BGA-type bonding is a method of bonding a target object using solder balls arranged in multiple rows and columns on one surface of a component to be bonded. BGA-type bonding can provide a path through which electrical signals flow between the first FPCB 310 and the flexible printed circuit board 200 and / or between the flexible printed circuit board 200 and the second FPCB 320. Here, the solder balls can have various shapes, such as spherical or hemispherical. For example, the solder balls can be made of a conductive metal material.

[0053] Refer to Figure 2 the cross-sectional view of, for example, when cut along line A-A' and observed in the -x axis direction, the cross-section of the flexible printed circuit board 200 can include a dielectric member 210, an adhesive member 220, a shielding member 230, a covering member 240, or wiring members 250 and 260. The flexible printed circuit board 200 can omit at least some of the foregoing components or include additional components as needed.

[0054] According to an example, the dielectric member 210 can be made of a non-conductive material. The dielectric member 210 can have a predetermined dielectric constant. The dielectric member 210 can be made of a material having relatively high flexibility and / or elongation characteristics. For example, the dielectric member 210 can include an epoxy-based, polymer-based, or polyurethane-based material. The dielectric member 210 can be made of a non-conductive material such as silicone rubber or polyimide. However, the present disclosure is not limited thereto, and the dielectric member 210 can be made of a non-conductive material having a predetermined dielectric constant.

[0055] According to an example, the adhesive member 220 can be a film-type adhesive member. The adhesive member 220 can be made of a material having predetermined flexibility and / or elongation characteristics. The adhesive member 220 can be disposed on the upper side of the dielectric member 210 with respect to the Z axis. The adhesive member 220 can include, for example, an epoxy-based adhesive, a polymer adhesive, or a polyurethane-based adhesive. The dielectric member 220 can be made of a non-conductive material such as silicone rubber or polyimide. However, the present disclosure is not limited thereto, and the dielectric member 220 can be made of a non-conductive material having a predetermined dielectric constant. The adhesive member 220 can be a thermoplastic adhesive having adhesive characteristics at room temperature.

[0056] According to an example, the shielding member 230 can be provided to protect the wiring members 250 and 260. The shielding member 230 can have a predetermined dielectric constant. The shielding member 230 can be made of a material having relatively high flexibility and / or elongation characteristics. For example, the shielding member 230 can include an epoxy-based, polymer-based, or polyurethane-based material. The shielding member 230 can be made of a non-conductive material such as silicone rubber or polyimide. However, the present disclosure is not limited thereto, and the shielding member 230 can be made of a non-conductive material having a predetermined dielectric constant.

[0057] According to an example, the covering member 240 can be arranged to form the appearance of the cable 100. The covering member 240 can provide physical protection for the internal structure of the cable 100 or the retractable printed circuit board 200. The covering member 240 can be made of a material having predetermined flexibility and / or elongation characteristics. The covering member 240 can have light or electrical shielding or insulating properties.

[0058] According to an example, the wiring members 250 and 260 can be arranged as paths for transmitting signals through the cable 100. For example, the wiring members 250 and 260 can provide a path for an electrical signal to flow from one end 313 of the first FPCB 310 to one end 321 of the second FPCB 320. For example, the wiring members 250 and 260 can provide a path for an electrical signal to flow from one end 321 of the second FPCB 320 to one end 313 of the first FPCB 310. The wiring members 250 and 260 can include the first wiring member 250 or the second wiring member 260.

[0059] According to an example, the wiring members 250 and 260 can be set by printing on the upper surface of the dielectric member 210 at a specific interval (e.g., Figure 3 the separation distance s1 between the wiring members 250 and 260).

[0060] For example, when transmitting a substantial signal generated from an electronic component connected via the cable 100 via the second wiring member 260, the first wiring member 250 can be arranged to ground the electrical signal. For example, the direction in which the electrical signal moves via the first wiring member 250 can face the direction in which the electrical signal moves via the second wiring member 260. For example, the first wiring member 250 can include a first ground wiring 251, a second ground wiring 253, a third ground wiring 255, or a fourth ground wiring 257. The second wiring member 260 can include a first signal wiring 261, a second signal wiring 262, a third signal wiring 263, a fourth signal wiring 264, a fifth signal wiring 265, or a sixth signal wiring 266. The present disclosure is not limited to the illustrated content, and depending on the type or area of the cable 100, the first wiring member 250 or the second wiring member 260 can include at least one wiring member or a plurality of wiring members.

[0061] According to an example, the wiring members 250 and 260 may be disposed on the upper surface of the dielectric member 210. For example, the first wiring member 250 or the second wiring member 260 may be arranged on the upper surface of the dielectric member 210 along the x-axis. The first wiring member 250 or the second wiring member 260 may be arranged alternately. For example, at least one signal wiring may be arranged between adjacent ground wirings among the plurality of ground wirings included in the first wiring member 250. For example, at least one ground wiring may be arranged between adjacent ground wirings among the plurality of signal wirings included in the second wiring member 260.

[0062] Figure 3 is an enlarged view and a cross-sectional view of a part of the second wiring member (e.g., Figure 2 the second wiring member 260) of the cable 100 before being stretched according to an embodiment. Although Figure 3 only shows the third signal wiring (e.g., Figure 2 the third signal wiring 263 in Figure 2 and the fourth signal wiring (e.g., Figure 2 the fourth signal wiring 264 in

[0063] Reference Figure 3 , the third signal wiring 263 may have a width w1 in the horizontal direction (or width direction) and a height t1 in the vertical direction (or height direction). The third signal wiring 263 may be spaced apart from the fourth signal wiring 264 by a predetermined interval s1. When the cable 100 is stretched, the width or height of the wiring or the interval between the wirings may change. In this regard, a more detailed description will be made with reference to Figure 7 .

[0064] According to an example, the wiring members 250 and 260 may have a predetermined stretchability and may also be conductive. For example, the wiring members 250 and 260 may include a stretchable material 270 or a conductive material 280.

[0065] For example, the stretchable material 270 may be a material having relatively high flexibility and / or stretchability. For example, the stretchable material 270 may include an epoxy-based, polymer-based, or polyurethane-based material. The stretchable material 270 may be made of a non-conductive material such as silicone rubber or polyimide. However, the present disclosure is not limited thereto, and the stretchable material 270 may be formed of a non-conductive material having a predetermined dielectric constant.

[0066] For example, the conductive material 270 may exist in the wiring members 250 and 260 in the form of powder. The conductive material 270 may be formed of a metallic material having a relatively high electrical conductivity. The conductive material 270 may be formed of, for example, silver, but the present disclosure is not limited thereto.

[0067] According to an example, the stretchable material 270 or the conductive material 280 included in the wiring members 250 and 260 may be set to a predetermined density. The conductive material 280 included in the wiring members 250 and 260 may be maintained at the above-mentioned set mass per unit volume or molecular weight per unit volume.

[0068] Figure 4 is a magnified view of a part of a cable (e.g., Figure 1 the cable 100 in Figure 1 ), and a sectional view taken along line B-B' in the longitudinal direction. Figure 4 The magnified view of Figure 2 may be substantially the same as the magnified view of the above Figure 4 Therefore, in the following description, the structure or configuration different from the above Figure 2 in the magnified view of Figure 4 will be mainly described. In Figure 2 the sectional view is a longitudinal sectional view taken along line B-B' in the longitudinal direction, and may be a sectional view taken parallel to the x-y plane at a predetermined height (e.g., a predetermined height between the dielectric member 210 and the wiring members 250 and 260) in the cross-sectional view of

[0069] Referring to Figure 4 the sectional view, for example, the sectional view in which the stretchable printed circuit board 200 is cut along line B-B' in the longitudinal direction and then observed in the +y-axis direction may have a structure in which the first wiring member 250 and the second wiring member 260 are arranged on the dielectric member 210 along the x-axis. The first wiring member 250 and the second wiring member 260 may be spaced apart from each other by a distance s1 on the basis of pre-stretching. The second wiring member 260 may be a wiring through which an electrical signal is transmitted between electronic components connected by the cable 100. The first wiring member 250 may be a wiring for providing a ground when an electrical signal is sent to the second wiring member 260. The direction in which the signal flows through the first wiring member 250 may be opposite to the direction in which the signal flows through the second wiring member 260. The inductance coefficients (hereinafter referred to as inductances) of the first wiring member 250 and the second wiring member 260 may be determined by the length l1, width d1, and height h1 of the first wiring member 250 and the second wiring member 260. Hereinafter, the inductance of the signal (e.g., current) flowing through the wiring members 250 and 260 before the cable 100 is stretched will be defined as L1.

[0070] According to an example, an adhesive member 220 may be disposed around the wiring members 250 and 260. The adhesive member 220 may physically join the dielectric member 210 and the shielding member 230. The adhesive member 220 may be arranged to fix the wiring members 250 and 260 printed on the upper surface of the dielectric member 210. Since the dielectric member 210 and the adhesive member 230 are made of non-conductive materials, their capacitance (hereinafter referred to as C) may be defined by the separation distance s1 between the wiring members 250 and 260. Hereinafter, the capacitance between the wiring members 250 and 260 before the cable 100 is stretched is defined as C1.

[0071] Figure 5 is a perspective view showing the state of the cable (e.g., Figure 1 the cable 100 in

[0072] Reference Figure 5 , since the cable 100 in the state (a) is the same as the cable 100 in Figure 1 , redundant description thereof will be omitted. The stretchable printed circuit board 200 corresponding to the elongated section in the cable 100 may be elongated in the length direction (e.g., the X-axis direction). For example, the stretchable printed circuit board 200 has a predetermined elongation rate, and thus may extend in a direction in which the two ends (e.g., Figure 2 the two ends 201 and 203 in

[0073] According to an example, the cable 100 in the state (b) is shown stretched to the critical point. The cable 100 stretched to the critical point may extend the length of the stretchable printed circuit board 200 to l2. Since the stretchable printed circuit board 200 is stretched, the width may be reduced to d2. For example, l2 may be greater than l1, and d2 may be less than d1. For example, l2 may be equal to l1, and d2 may be less than d1. For example, l2 may be greater than l1, and d2 may be equal to d1. When the tension acting in the length direction is removed, the two ends 201 and 203 of the stretchable printed circuit board 200 may contract in the length direction and may return to the cable 100 in the state (a) again. When the stretchable printed circuit board 200 contracts, the lengths of the first FPCB 310 and the second FPCB 320 corresponding to the non-elongated period may not increase or decrease in the length direction.

[0074] According to an example, the degree to which the stretchable printed circuit board 200 in state (a) is stretched to state (b) or the degree to which the stretchable printed circuit board 200 in state (b) is contracted to state (a) can be determined based on the inductance coefficient and capacitance present in the wiring members (e.g., Figure 2 the wiring members 250 and 260 in

[0075] According to the stretchable printed circuit board 200 in state (a), the characteristic impedance Z1 is defined by the following Equation 1.

[0076] <Equation 1>

[0077] where L1 may be the inductance coefficient generated by the stretchable printed circuit board 200 in state (a), and C1 may be the capacitance generated by the stretchable printed circuit board 200 in state (a). The unit of the characteristic impedance Z1 is ohm (Ω).

[0078] According to the stretchable printed circuit board 200 in state (a), the characteristic impedance Z2 is defined by the following Equation 2.

[0079] <Equation 2>

[0080] where L2 may be the inductance coefficient generated by the stretchable printed circuit board 200 in state (b), and C2 may be the capacitance generated by the stretchable printed circuit board 200 in state (b). The unit of the characteristic impedance Z2 is ohm (Ω). L1, C1, L2, C2, Z1, and Z2 obtained from the stretchable printed circuit board 200 will be described below with reference to Figure 6 will be described.

[0081] Figure 6 is a cross-sectional view (a) of the stretchable printed circuit board before stretching (e.g., Figure 1 the stretchable printed circuit board 200 in Figure 6 and a cross-sectional view (b) of the stretched stretchable printed circuit board 200 according to an embodiment of the present disclosure. Since Figure 2Those of the cross-sectional views will be omitted, and any redundant description will be omitted, and the differences will be described in detail.

[0082] Reference Figure 6 , in the state (a), the flexible printed circuit board 200 may have a width d1 and a height h1. In the state (b), the flexible printed circuit board 200 may have a width d2 and a height h2. The width d2 may be equal to or less than d1. The height h2 may be equal to or less than h1.

[0083] According to an example, compared with the state (a), in the state (b), at least part or all of the dielectric member 210, the adhesive member 220, the shielding member 230, the shielding member 240, or the wiring members 250 and 260 may be relatively contracted. For example, the height or width of the wiring members 250 and 260 may be reduced, or the distance between the wiring members 250 and 260 may be reduced. When the height or width of the wiring members 250 and 260 is reduced, the inductance coefficient L2 of the current flowing through the wiring members 250 and 260 may increase. When the distance between the wiring members 250 and 260 is reduced, the capacitance C2 may increase as the charge moves to the wiring members 250 and 260. When the inductance coefficient L2 and the capacitance C2 are changed, the characteristic impedance Z2 may be set. Reference will be made to Figure 7 for a more detailed description of the above related content.

[0084] Figure 7 is an enlarged view of a part of the cross-sectional view according to an embodiment of the present disclosure (for example, Figure 6 Part III). The two cross-sectional views of the states (a) and (b) only show the second ground wiring 253, the third ground wiring 255, the third signal wiring 263, and the fourth signal wiring 264, but they can be understood as including the entire wiring members 250 and 260 included in the flexible printed circuit board 200.

[0085] Reference Figure 7 , in the state (a), the third signal wiring 263 may have a width w1 and a height t1. The third signal wiring 263 may be spaced apart from the fourth signal wiring 264 by s1. The inductance coefficient of the third signal wiring 263 may be determined by the width w1, the height t1, and the length of the third signal wiring 263 (for example, Figure 5The length l1 in ) is used to determine. The capacitance of the third signal wiring 263 can be determined by the width w1, height t1, and length l1 of the third signal wiring 263, as well as the separation distance s1 between the third signal wiring 263 and the fourth signal wiring 264. In this way, the inductance coefficients and capacitances of the remaining wiring components 250 and 260 including the third signal wiring 263 can be determined, and by synthesizing the inductance coefficients and capacitances in each of the determined wiring components 250 and 260, the inductance coefficient L1 and capacitance C1 of the stretchable printed circuit board 200 can be obtained. For example, the characteristic impedance Z1 of the stretchable printed circuit board 200 in state (a) can be calculated using the inductance coefficient L1 and capacitance C1 through the above equation 1.

[0086] According to the example, in state (b), the third signal wiring 263 can have a width w2 and a height t2. The third signal wiring 263 can be spaced apart from the fourth signal wiring 264 by s2. For example, the value of w2 can be equal to or less than w1. The value of t2 can be equal to or less than t1. The value of s2 can be equal to or less than s1. The inductance coefficient of the third signal wiring 263 can be determined by the width w2, height t2, and length (e.g., Figure 5 The length l1 in ). The capacitance of the third signal wiring 263 can be determined by the width w2, height t2, and length l2 of the third signal wiring 263, as well as the separation distance s2 between the third signal wiring 263 and the fourth signal wiring 264. In this way, the inductance coefficients and capacitances of the remaining wiring components 250 and 260 including the third signal wiring 263 can be determined, and by synthesizing the inductance coefficients and capacitances in each of the determined wiring components 250 and 260, the inductance coefficient L2 and capacitance C2 of the stretchable printed circuit board 200 can be obtained. For example, the characteristic impedance Z2 of the stretchable printed circuit board 200 in state (b) can be calculated using the inductance coefficient L2 and capacitance C2 through equation 2.

[0087] According to the example, when comparing the characteristic impedance Z1 of the stretchable printed circuit board 200 in state (a) with the characteristic impedance Z2 of the stretchable printed circuit board 200 in state (b), Z2 can be less than or equal to Z1. Therefore, the lengths (l1, l2), widths (w1, w2), and heights (h1, h2) of the wiring components 250 and 260 before and after stretching, or the wiring distances (s1, s2), can be considered such that the difference between Z2 and Z1 remains at a predetermined ratio (e.g., 10% of the reference impedance) with respect to the reference impedance (e.g., 50 ohms).

[0088] Figure 8The longitudinal cross-sectional view (a) of the stretchable printed circuit board 200 before stretching and the longitudinal cross-sectional view (b) of the stretchable printed circuit board 200 after stretching according to an embodiment of the present disclosure are shown. View (a) is Figure 4 an enlarged view of a part (II), and in the following description, redundant descriptions may be omitted and the differences will be mainly described. In addition, the two longitudinal cross-sectional views (a) and (b) shown above only show the second ground wiring 253, the third ground wiring 255, the third signal wiring 263, and the fourth signal wiring 264, but it should be understood that the entire wiring members 250 and 260 included in the stretchable printed circuit board 200 are included.

[0089] Refer to Figure 8 , in state (a), the third signal wiring 263 may have a width w1. Although not shown herein, the third signal wiring 263 may have a length l1 in its longitudinal direction. The third signal wiring 263 may be spaced apart from the fourth signal wiring 264 by s1. The inductance coefficient of the third signal wiring 263 may be determined by the width w1, height (e.g., Figure 7 the height t1 in

[0090] ), and length l1 of the third signal wiring 263. The capacitance of the third signal wiring 263 may be determined by the width w1, height t1, and length l1 of the third signal wiring 263 and the separation distance s1 between the third signal wiring 263 and the fourth signal wiring 264. In this way, the inductance coefficients and capacitances of the remaining wiring members 250 and 260 including the third signal wiring 263 can be determined, and by synthesizing the inductance coefficients and capacitances in each of the determined wiring members 250 and 260, the inductance coefficient L1 and capacitance C1 of the stretchable printed circuit board 200 can be obtained. For example, the characteristic impedance Z1 of the stretchable printed circuit board 200 in state (a) can be calculated using the inductance coefficient L1 and capacitance C1 by Equation 1. Figure 7determined by the height t2) and length l2. The capacitance of the third signal wiring 263 can be determined by the width w2, height t2, and length l2 of the third signal wiring 263 and the separation distance s2 between the third signal wiring 263 and the fourth signal wiring 264. In this way, the inductance coefficients and capacitances of the remaining wiring members 250 and 260 including the third signal wiring 263 can be determined, and then by synthesizing the inductance coefficients and capacitances in each of the determined wiring members 250 and 260, the inductance coefficient L2 and capacitance C2 of the stretchable printed circuit board 200 can be obtained. For example, the characteristic impedance Z2 of the stretchable printed circuit board 200 in state (b) can be calculated using the inductance coefficient L2 and capacitance C2 by Equation 2.

[0091] According to the example, when comparing the characteristic impedance Z1 of the stretchable printed circuit board 200 in state (a) with the characteristic impedance Z2 of the stretchable printed circuit board 200 in state (b), Z2 can be less than or equal to Z1. Therefore, the lengths (l1, l2), widths (w1, w2), and heights (h1, h2) of the wiring members 250 and 260 before and after stretching or the wiring distances (s1, s2) can be considered such that the difference between Z2 and Z1 remains within a predetermined ratio (e.g., 10% of the reference impedance) with respect to the reference impedance (e.g., 50 ohms).

[0092] Figure 9 is an exploded perspective view of the electronic device 1 according to an embodiment.

[0093] Reference Figure 9 , for example, the electronic device 1 may include a display unit 920, a bracket assembly 930, a substrate 940, a first housing structure 911, a second housing structure 912, a first rear cover 914, and a second rear cover 915. In the present disclosure, the display unit 920 may be referred to as a display module or a display assembly.

[0094] The display unit 920 may include a display 921 and one or more boards or layers 922 on which the display 921 is seated. For example, the board 922 may be disposed between the display 921 and the bracket assembly 930. The display 921 may be disposed on at least a part of one surface (e.g., the upper surface with respect to Figure 9 of the board 922). The board 922 may be formed in a shape corresponding to the display 921. For example, a partial region of the board 922 may be formed in a shape corresponding to the notch 9214 of the display 921.

[0095] The bracket assembly 930 may include a first bracket 931, a second bracket 932, a hinge structure (not shown) disposed between the first bracket 931 and the second bracket 932, a hinge cover 913 that covers the hinge structure when viewed from the outside, and a wiring member 933 (e.g., a flexible printed circuit board (FPCB)) that spans the first bracket 931 and the second bracket 932.

[0096] According to an example, the bracket assembly 930 may be disposed between the plate 922 and the substrate 940. For example, the first bracket 931 may be disposed between the first region 9212 of the display 921 and the first substrate 941. The second bracket 932 may be disposed between the second region 9213 of the display 921 and the second substrate 942.

[0097] According to an example, at least a portion of the wiring member 933 and the hinge structure may be disposed in the bracket assembly 930. The wiring member 933 may be disposed in a direction that spans the first bracket 931 and the second bracket 932 (e.g., the x-axis direction). The wiring member 933 may be disposed in a direction perpendicular to the folding axis D of the folding region 9211 of the electronic device 1 (e.g., Figure 1 the length direction (X-axis direction) of the cable 100 in the figure).

[0098] As described above, the substrate 940 may include a first substrate 941 disposed on one side of the first bracket 931 and a second substrate 942 disposed on one side of the second bracket 932. The first substrate 941 and the second substrate 942 may be disposed within a space formed by the bracket assembly 930, the first housing structure 911, the second housing structure 912, the first rear cover 914, and the second rear cover 915. Components for implementing various functions of the electronic device 1 may be mounted on the first substrate 941 and the second substrate 942.

[0099] The first housing structure 911 and the second housing structure 912 may be assembled to be coupled to both sides of the bracket assembly 930, and the display unit 920 is coupled to the bracket assembly 930. As described below, the first housing structure 911 and the second housing structure 912 may slide on both sides of the bracket assembly 930 to be coupled to the bracket assembly 930.

[0100] According to an example, the first housing structure 911 may include a first rotation support surface 9111, and the second housing structure 912 may include a second rotation support surface 9121 corresponding to the first rotation support surface 911. The first rotation support surface 9111 and the second rotation support surface 9121 may include curved surfaces corresponding to the curved surface included in the hinge cover 913.

[0101] According to an example, when the electronic device 1 is in the unfolded state, the first rotation support surface 9111 and the second rotation support surface 9121 can cover the hinge cover 913, such that the hinge cover 913 can be not exposed or minimally exposed to the rear of the electronic device 1. Meanwhile, when the electronic device 1 is in the folded state, the first rotation support surface 9111 and the second rotation support surface 9121 can rotate along the curved surface included in the hinge cover 913, such that the hinge cover 913 can be maximally exposed to the rear surface of the electronic device 1.

[0102] According to an example, the wiring member 933 can be implemented as the cable 100 of the present disclosure. The cable 100 can include a first cable 100a or a second cable 100b. The cable 100 can physically or electrically connect the first substrate 941 and the second substrate 942. For example, although not shown herein, the connection end provided at the other end 311 of the first FPCB (e.g., the first FPCB 310 in Figure 1 can be coupled to the connection end provided at the first substrate 941, or the connection end provided at the other end 323 of the second FPCB (e.g., the second FPCB 320 in Figure 1 can be coupled to the connection end provided at the second substrate 941.

[0103] According to an example, when the electronic device 1 is in the folded state, the cable 100 can correspond to the maximum contraction state (e.g., the state (a) in Figure 5 ), and when the electronic device 1 is in the unfolded state, the cable 100 can correspond to the maximum stretching state (e.g., the state (b) in Figure 5 ).

[0104] According to an example, the cable 100 is not limited to the first cable 100a or the second cable 200a shown in the above figure, and can also be applied to the cable for connecting the electronic components provided in the electronic device 1 or transmitting signals. In particular, the cable 100 can be provided in the stretching or bending part or region of the electronic device 1.

[0105] According to an example, the electronic device 1 is not limited to the foldable device that can be folded to both sides as shown in the figure, and can also be applied to the up-and-down foldable electronic device, the electronic device having a rollable display, and the wearable device (e.g., bracelet-type (or anklet-type) electronic device, necklace-type electronic device, ring-type electronic device, AR glasses, head-mounted display (HMD) device, etc.) in various ways.

[0106] The cable 100 according to an embodiment of the present disclosure may include: a stretchable circuit board 200 configured to be stretched in a length direction in which a first pad member 331 and a second pad member 333 are moved away from each other by an external force, wherein one end 313 of a first printed circuit board 310 is joined through the first pad member 331, and one end of a second printed circuit board 320 is joined through the second pad member 333. The stretchable circuit board 200 may include a plurality of wiring members 250 and 260 configured to be stretched by an external force, and one side and the other side thereof are electrically coupled to the first pad member 331 and the second pad member 333 on an upper surface of a dielectric member 210 disposed inside a covering member 240, respectively, wherein the plurality of wiring members 250 and 260 may be arranged to be spaced apart from each other at a predetermined interval (s) in a width direction perpendicular to the length direction.

[0107] In the cable 100 according to an embodiment of the present disclosure, the first printed circuit board 310 or the second printed circuit board 320 may have a width relatively greater than a width (w) of the stretchable circuit board 200.

[0108] In the cable 100 according to an embodiment of the present disclosure, the first printed circuit board 310 or the second printed circuit board 320 may be a flexible printed circuit board (FPCB).

[0109] In the cable 100 according to an embodiment of the present disclosure, the stretchable printed circuit board 200 may include an adhesive member 220 configured to cover the plurality of wiring members 250 and 260 at a predetermined thickness inside the covering member 240, and a shielding member 230 configured to be joined to an upper portion of the adhesive member 220 inside the covering member 240.

[0110] In the cable 100 according to an embodiment of the present disclosure, the first pad member 331 may be configured to join the first printed circuit board 310 and the stretchable printed circuit board 200 by an anisotropic conductive film (ACF) method or a ball grid array (BGA) method, and the second pad member 333 may be configured to join the second printed circuit board 320 and the stretchable printed circuit board 200 by the ACF method or the BGA method.

[0111] In the cable 100 according to an embodiment of the present disclosure, the plurality of wiring members 250 and 260 may be configured such that a conductive material 280 exists in a stretchable material 270 in a powder form at a predetermined density.

[0112] In the cable 100 according to an embodiment of the present disclosure, the stretchable material 270 may include an epoxy-based, polymer-based, or polyurethane-based material, and the conductive material 280 may include a metal material having a relatively high conductivity.

[0113] In cable 100 according to an embodiment of the present disclosure, the dielectric member 210 and the shielding member 230 may be made of a non-conductive material, and the non-conductive material may include silicone rubber or polyimide.

[0114] In cable 100 according to an embodiment of the present disclosure, at least one of the separation distance (s) between the plurality of wiring members 250 and 260, the width (w) or the height (h) of the plurality of wiring members 250 and 260 may be determined within a range in which the difference between the impedance before stretching by an external force and the impedance after stretching does not exceed a threshold level.

[0115] In cable 100 according to an embodiment of the present disclosure, the plurality of wiring members 250 and 260 may be configured such that the first wiring member 260 for transmitting an electrical signal between the first printed circuit board 310 and the second printed circuit board 320 and the second wiring member 250 for grounding are alternately arranged.

[0116] An electronic device 1 according to an embodiment of the present disclosure may include a display 920, housings 911 and 912, at least one bracket 930, at least one substrate 940, at least one cable for connecting the at least one substrate 940 or connecting electronic components provided on the at least one substrate 940, and rear covers 914 and 915. Here, the at least one cable may include a cable 100 stretched in a predetermined direction. The cable 100 stretched in the predetermined direction may include a stretchable circuit board 200 configured to be stretched in a length direction in which the first pad member 331 and the second pad member 333 are moved away from each other by an external force, wherein one end 313 of the first printed circuit board 310 is joined through the first pad member 331, and one end of the second printed circuit board 320 is joined through the second pad member 333. The stretchable circuit board 200 may include a plurality of wiring members 250 and 260 configured to be stretched by an external force, and one side and the other side thereof are electrically coupled to the first pad member 331 and the second pad member 333 on an upper surface of the dielectric member 210 provided inside the covering member 240, respectively, wherein the plurality of wiring members 250 and 260 may be arranged to be spaced apart from each other at a predetermined interval (s) in a width direction perpendicular to the length direction.

[0117] In the electronic device 1 according to an embodiment of the present disclosure, the first printed circuit board 310 or the second printed circuit board 320 may have a width relatively greater than the width (w) of the stretchable circuit board 200.

[0118] In the electronic device 1 according to an embodiment of the present disclosure, the first printed circuit board 310 or the second printed circuit board 320 may be a flexible printed circuit board (FPCB).

[0119] In the electronic device 1 according to an embodiment of the present disclosure, the retractable printed circuit board 200 may include an adhesive member 220 configured to cover a plurality of wiring members 250 and 260 with a predetermined thickness inside a covering member 240, and a shielding member 230 configured to be joined to an upper portion of the adhesive member 220 inside the covering member 240.

[0120] In the electronic device 1 according to an embodiment of the present disclosure, the first pad member 331 may be configured to join the first printed circuit board 310 and the retractable printed circuit board 200 by an anisotropic conductive film (ACF) method or a ball grid array (BGA) method, and the second pad member 333 may be configured to join the second printed circuit board 320 and the retractable printed circuit board 200 by an ACF method or a BGA method.

[0121] In the electronic device 1 according to an embodiment of the present disclosure, the plurality of wiring members 250 and 260 may be configured such that a conductive material 280 exists in a retractable material 270 in a powder form with a predetermined density.

[0122] In the electronic device 1 according to an embodiment of the present disclosure, the retractable material 270 may include an epoxy-based, polymer-based, or polyurethane-based material, and the conductive material 280 may include a metal material having a relatively high conductivity.

[0123] In the electronic device 1 according to an embodiment of the present disclosure, the dielectric member 210 and the shielding member 230 may be made of a non-conductive material, and the non-conductive material may include silicone rubber or polyimide.

[0124] In the electronic device 1 according to an embodiment of the present disclosure, at least one of a separation distance (s) between the plurality of wiring members 250 and 260, a width (w) of the plurality of wiring members 250 and 260, or a height (h) may be determined within a range in which a difference between an impedance before being stretched by an external force and an impedance after being stretched does not exceed a threshold level.

[0125] In the cable 100 according to an embodiment of the present disclosure, the plurality of wiring members 250 and 260 may be configured such that a first wiring member 260 for transmitting an electrical signal between the first printed circuit board 310 and the second printed circuit board 320 and a second wiring member 250 for grounding are alternately arranged.

[0126] The device according to an embodiment disclosed herein may be one of various types of devices. The device may include, for example, a display device, a portable communication device (e.g., a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a household appliance. The device according to an embodiment of the present disclosure is not limited to the devices described above.

[0127] It should be understood that the various embodiments and the terms used therein are not intended to limit the technical features set forth herein to specific embodiments, but include various changes, equivalent forms or alternative forms corresponding to the respective embodiments. For the description of the drawings, like reference numerals may be used to refer to like or related elements. It will be understood that a singular noun corresponding to a term may include one or more things, unless the relevant context clearly indicates otherwise. As used herein, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B or C" may include any one or all possible combinations of the items listed together in the corresponding one of the plurality of phrases. As used herein, terms such as "first" and "second" or "1st" and "2nd" may be used to simply distinguish the corresponding components from another component, and do not limit the components in other respects (e.g., importance or order). It will be understood that in the case where the terms "operably" or "communicatively" are used or in the case where the terms "operably" or "communicatively" are not used, if an element (e.g., a first element) is referred to as "coupled with another element (e.g., a second element)", "coupled to another element (e.g., a second element)", "connected with another element (e.g., a second element)", or "connected to another element (e.g., a second element)", it means that the one element can be directly (e.g., wired) connected to the other element, wirelessly connected to the other element, or connected to the other element via a third element.

[0128] As used in connection with the various embodiments of the present disclosure, the term "module" may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with other terms (e.g., "logic", "logic block", "component", "portion", "part", or "circuit"). A module can be a single integrated component adapted to perform one or more functions or the smallest unit or portion of the single integrated component. For example, according to an embodiment, a module may be implemented in the form of an application specific integrated circuit (ASIC).

[0129] The various embodiments described herein can be implemented as software (e.g., a program) including one or more instructions that are machine-readable (e.g., by an electronic device 1) and stored in a storage medium (e.g., an internal memory or an external memory). For example, under the control of a processor, the processor of the machine (e.g., the electronic device 1) can invoke at least one of the one or more instructions stored in the storage medium with or without using one or more other components and run the at least one instruction. This enables the machine to operate to perform at least one function according to the at least one instruction invoked. The one or more instructions can include code generated by a compiler or code that can be run by an interpreter. The machine-readable storage medium can be provided in the form of a non-transitory storage medium. Herein, the term "non-transitory" only means that the storage medium is a tangible device and does not include signals (e.g., electromagnetic waves), but this term does not distinguish between data being stored semi-permanently in the storage medium and data being stored temporarily in the storage medium.

[0130] According to an embodiment, a method according to various embodiments disclosed herein can be included and provided in a computer program product. The computer program product can be traded between a seller and a purchaser as a product. The computer program product can be distributed (e.g., downloaded or uploaded) online via an application store (e.g., Play Store TM ), or can be directly distributed (e.g., downloaded or uploaded) between two user devices (e.g., smart phones). If it is distributed online, at least part of the computer program product can be generated temporarily, or at least part of the computer program product can be stored at least temporarily in a machine-readable storage medium (such as the memory of a manufacturer's server, an application store's server, or a forwarding server).

[0131] According to various embodiments, each of the above components (e.g., a module or a program) may include a single entity or multiple entities, and some of the multiple entities may be separately provided in different components. According to various embodiments, one or more of the above components may be omitted, or one or more other components may be added. Optionally or additionally, multiple components (e.g., modules or programs) may be integrated into a single component. In this case, according to various embodiments, the integrated component may still perform the one or more functions of each of the multiple components in the same or similar manner as the corresponding one of the multiple components performed one or more functions before integration. According to various embodiments, the operations performed by a module, a program, or another component may be performed sequentially, in parallel, repeatedly, or in a heuristic manner, or one or more of the operations may be run in a different order or omitted, or one or more other operations may be added.

Claims

1. A cable (100) used in an electronic device (1), the cable (100) comprising: A retractable circuit board (200), the retractable circuit board being configured to be stretched in a length direction in which a first pad member (331) and a second pad member (333) are moved away from each other by an external force, wherein one end (313) of a first printed circuit board (310) is joined through the first pad member (331), and one end (321) of a second printed circuit board (320) is joined through the second pad member (333), Wherein the retractable circuit board (200) includes a plurality of wiring members (250, 260), the plurality of wiring members being configured to be stretched by an external force, and one side and the other side of the plurality of wiring members are respectively electrically coupled to the first pad member (331) and the second pad member (333) on an upper surface of a dielectric member (210) provided inside a covering member (240), Wherein the plurality of wiring members (250, 260) are arranged to be spaced apart from each other at a predetermined interval (s) in a width direction perpendicular to the length direction.

2. The cable (100) according to claim 1, wherein, The width of the first printed circuit board (310) or the second printed circuit board (320) is relatively larger than the width (w) of the retractable circuit board (200).

3. The cable (100) according to claim 1, wherein, The first printed circuit board (310) or the second printed circuit board (320) is a flexible printed circuit board.

4. The cable (100) according to claim 1, wherein, The retractable circuit board (200) includes: An adhesive member (220), the adhesive member being configured to cover the plurality of wiring members (250, 260) with a predetermined thickness inside the covering member (240); and A shielding member (230), the shielding member being configured to be joined to an upper portion of the adhesive member (220) inside the covering member (240).

5. The cable (100) according to claim 1, Among them, The first pad member (331) is configured to join the first printed circuit board (310) and the retractable circuit board (200) by an anisotropic conductive film ACF method or a ball grid array BGA method, and Wherein the second pad member (333) is configured to join the second printed circuit board (320) and the retractable circuit board (200) by the ACF method or the BGA method.

6. The cable (100) according to claim 1, wherein, The plurality of wiring members (250, 260) are configured such that a conductive material (280) exists in a retractable material (270) in a powder form at a predetermined density.

7. The cable (100) according to claim 6, Among them, The retractable material (270) includes an epoxy-based, polymer-based, or polyurethane-based material, and Wherein the conductive material (280) includes a metal material having relatively high conductivity.

8. The cable (100) according to claim 4, Among them, The dielectric member (210) and the shielding member (230) are made of a non-conductive material, and Wherein the non-conductive material includes silicone rubber or polyimide.

9. The cable (100) according to claim 1, wherein, At least one of the separation distance (s) between the plurality of wiring members (250, 260), the width (w), or the height (h) of the plurality of wiring members (250, 260) is determined within a range in which the difference between the impedance before stretching by the external force and the impedance after stretching does not exceed a threshold level.

10. The cable (100) according to claim 1, wherein, The plurality of wiring members (250, 260) are configured such that a first wiring member (260) for transmitting an electrical signal between the first printed circuit board (310) and the second printed circuit board (320) and a second wiring member (250) for grounding are alternately arranged.

11. An electronic device (1), the electronic device comprising: A display (920); A housing (911, 912); At least one bracket (930); At least one substrate (940); At least one cable for connecting the at least one substrate (940) or connecting electronic components provided on the at least one substrate (940); And A rear cover (914, 915), Wherein, the at least one cable includes a cable (100) stretched in a predetermined direction; Wherein, the cable (100) stretched in the predetermined direction includes a stretchable circuit board (200), the stretchable circuit board being configured to be stretched by an external force in the length direction in which a first pad member (331) and a second pad member (333) are separated from each other, wherein one end (313) of a first printed circuit board (310) is joined through the first pad member (331), and one end (321) of a second printed circuit board (320) is joined through the second pad member (333); Wherein, the stretchable circuit board (200) includes a plurality of wiring members (250, 260), the plurality of wiring members being configured to be stretched by an external force, and one side and the other side of the plurality of wiring members are respectively electrically coupled to the first pad member (331) and the second pad member (333) on the upper surface of a dielectric member (210) provided inside a covering member (240); Wherein, the plurality of wiring members (250, 260) are arranged to be spaced apart from each other at a predetermined interval (s) in a width direction perpendicular to the length direction.

12. The electronic device (1) according to claim 11, Among them, The width of the first printed circuit board (310) or the second printed circuit board (320) is relatively larger than the width (w) of the stretchable circuit board (200), and Wherein, the first printed circuit board (310) or the second printed circuit board (320) is a flexible printed circuit board.

13. The electronic device (1) according to claim 11, wherein, The stretchable circuit board (200) includes: An adhesive member (220) configured to cover the plurality of wiring members (250, 260) with a predetermined thickness inside the covering member (240); and A shielding member (230) configured to be joined to the upper portion of the adhesive member (220) inside the covering member (240), Among them, the dielectric member (210) and the shielding member (230) are made of non-conductive materials. Among them, the non-conductive materials include silicone rubber or polyimide.

14. The electronic device (1) according to claim 11, Among them, The first pad member (331) is configured to join the first printed circuit board (310) and the flexible printed circuit board (200) by an anisotropic conductive film (ACF) method or a ball grid array (BGA) method, and Among them, the second pad member (333) is configured to join the second printed circuit board (320) and the flexible printed circuit board (200) by the ACF method or the BGA method.

15. The electronic device (1) according to claim 11, Among them, The plurality of wiring members (250, 260) are configured such that a conductive material (280) exists in a flexible material (270) in powder form at a predetermined density; Among them, the flexible material (270) includes an epoxy-based, polymer-based or polyurethane-based material, and Among them, the conductive material (280) includes a metal material having relatively high conductivity.

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