Spring-type FPCB for camera module and camera module having spring-type FPCB embedded therein

The integration of a spring-type FPCB with a synthetic resin and metal foil signal transmission member in the camera module addresses the limitations of conventional optical image stabilization systems by enhancing durability and control efficiency, preventing electrical shorts and foreign substance generation.

WO2025005341A1PCT designated stage expired Publication Date: 2025-01-02JAEYOUNG SOLUTEC
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Patent Information

Application Number
PCT/KR2023/012905
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-28
Filing Date
2023-08-30
Publication Date
2025-01-02

AI Technical Summary

Technical Problem

Conventional optical image stabilization systems in smartphones face limitations due to limited internal space, and existing metal springs suffer from fatigue, leading to potential electrical shorts and foreign substance generation from friction, which affects durability and efficiency.

Method used

A spring-type FPCB made of synthetic resin with a metal foil signal transmission member, integrated into the camera module, provides elastic support and signal transmission, designed with a laminated structure of polyimide films and a U-, V-, W-, or ring-shaped bending portion to enhance durability and prevent electrical shorts.

Benefits of technology

The solution ensures long-term durability and prevents foreign substance generation, allowing efficient control of AF and OIS carriers with improved fatigue life and reduced risk of electrical shorts, while maintaining structural flexibility.

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Abstract

The present invention relates to a spring-type FPCB for a camera module and a camera module having the spring-type FPCB embedded therein. The spring-type FPCB for a camera module, for elastically supporting a lens module carrier while being embedded in a housing and a camera module, which is installed in the housing to be adjustable in position and comprises the lens module carrier for accommodating a lens module, comprises: an elastic connecting band, which has a predetermined thickness, can be elastically deformed, and extends in a lengthwise direction to connect the housing and the lens module carrier; and a signal transmission member, which is accommodated in the elastic connecting band and induces electrical signals applied from the outside to the lens module carrier. The spring-type FPBC for a camera module, according to the present invention, has a polymer film coated thereon and thus, even after being used for a long time, prevents debris from being generated due to friction with nearby components and does not cause concern about an electrical short. The spring-type FPBC of the present invention also has a long fatigue life and thus is not cut even when used for a long time, offering good durability. In addition, since the camera module of the present invention has a spring-type FPCB adopted as the plate spring involved in the movement of the lens module, the circuit pattern of the FPCB can be designed in various ways, which enables more efficient control over an AF carrier or OIS carrier.
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Description

Spring-type FPCB for camera modules and camera modules with built-in spring-type FPCB

[0001] The present invention relates to a camera module mounted on a camera of a portable electronic device, and more specifically, to a spring-type FPCB for a camera module, in which a spring involved in the movement of a lens module has the form of an FPCB composed of a polymer resin and a metal, and a camera module having the spring-type FPCB built in.

[0002] Cameras in recently released smartphones and other portable electronic devices incorporate a variety of cutting-edge technologies. These include features like autofocusing, which automatically focuses the camera more quickly, and image stabilization.

[0003] Image stabilization is a feature that helps capture images of a relatively high quality even when the camera shakes during photography. There are two types of image stabilization: electronic and optical.

[0004] Electronic correction technology is a technology that improves a captured image through a process using software, etc., and optical image stabilization (OIS) is a technology that prevents shaking from being reflected in the image of the subject generated on the image sensor by physically correcting the position of the lens module or image element caused by hand shake, etc.

[0005] However, while optical image stabilization technology can be easily applied to digital cameras with relatively ample internal space, its application is limited in devices with limited internal space, such as smartphones. This necessitates the development of smaller image stabilization devices.

[0006] Meanwhile, optical image stabilization devices include a spring that elastically supports the lens module. This spring quickly returns the lens module to its original position on the optical axis when it is momentarily dislocated by an external impact. There are various types of springs that perform this function. These springs are typically made of metal.

[0007] However, conventional springs can easily break due to accumulated fatigue caused by changes in curvature as the lens module moves repeatedly, and can also wear out plastic parts due to interference with surrounding plastic parts, generating fine plastic dust.

[0008] As a background technology for an invention related to a camera module having an anti-shake function, Korean Patent Publication No. 10-1543717 (OIS camera module) has been disclosed.

[0009] The disclosed camera module includes a lens bobbin portion on which a lens is mounted; a horizontal actuator that moves the lens bobbin portion in a horizontal direction perpendicular to an optical axis; a sensor portion that detects the amount of horizontal movement of the lens bobbin portion by the horizontal actuator; a main body that surrounds the lens bobbin portion; and an intermediate unit having the vertical actuator that moves the lens bobbin portion in the optical axis direction and the lens bobbin portion, wherein the horizontal actuator is provided with an OIS coil that is installed in one of the intermediate unit and the main body, and an OIS magnet that is installed in the other of the intermediate unit and the main body, and the sensor portion, the OIS coil, and the OIS magnet are provided at different positions in the optical axis direction, and the OIS magnet has a structure in which it is provided between the sensor portion and the OIS coil.

[0010] The present invention was created to solve the above problems, and its purpose is to provide a spring-type FPCB for a camera module that does not generate foreign substances due to friction with surrounding parts even after long-term use, has no risk of electrical short-circuiting, and has good durability.

[0011] In addition, the present invention aims to provide a camera module having a built-in spring-type FPCB, which can control an AF carrier or an OIS carrier more efficiently by designing the circuit pattern of the FPCB in various ways.

[0012] As a solution to the problem for achieving the above object, the spring-type FPCB for a camera module of the present invention comprises a camera module including a housing, and a lens module carrier that is installed in the housing so as to be positionally adjustable and accommodates a lens module, and elastically supports the lens module carrier in a built-in state, and includes an elastic connecting band that has a predetermined thickness, is elastically deformable, and extends in the longitudinal direction to connect the housing and the lens module carrier; and a signal transmission member that is accommodated inside the elastic connecting band and guides an electric signal applied from the outside to the lens module carrier.

[0013] In addition, the elastic connecting band is made of synthetic resin and has a film-type base sheet and cover sheet that are mutually fusion-bonded with a signal transmission member therebetween.

[0014] In addition, the base sheet and the cover sheet are polyimide films having a certain thickness, and the signal transmission member is a metal foil interposed between the base sheet and the cover sheet.

[0015] In addition, the spring-type FPCB further has a bending portion that can be elastically deformed according to the movement of the lens module carrier.

[0016] In addition, the bending portion takes the shape of a U, V, W, or ring.

[0017] In addition, as a solution to the problem for achieving the above object, the camera module of the present invention has a housing that provides an upper open receiving space and has an optical path formed therein; a lens module received inside the housing; a lens module carrier that is installed in the housing so as to be positionally adjustable and receives the lens module; a driving unit that drives the lens module carrier to move the lens module in the optical axis direction and the direction perpendicular to the optical axis; an elastic connecting band that elastically supports the lens module carrier while installed inside the housing and is elastically deformable and extends in the longitudinal direction to connect the housing and the lens module carrier; and a spring-type FPCB that includes a signal transmission member that is received inside the elastic connecting band and induces an electric signal applied from the outside to the lens module carrier.

[0018] In addition, the elastic connecting band is made of synthetic resin and has a film-type base sheet and cover sheet that are mutually fusion-bonded with a signal transmission member therebetween.

[0019] In addition, the base sheet and the cover sheet are polyimide films having a certain thickness, and the signal transmission member is a metal foil interposed between the base sheet and the cover sheet.

[0020] And, the housing has a shape of a square frame, and the four corners of the housing are provided with corner supports that support the ends of the spring-type FPCB and insert electrodes that output electric signals, the lens module carrier is provided with an OIS carrier that can move in a direction perpendicular to the optical axis, and an AF carrier that can be positioned in the direction of the optical axis, has an AF coil wound around an outer periphery, and has a coil connection terminal provided on the upper part to be connected to the AF coil, and the elastic connecting band is provided with a first support end supported by one corner support end, a connection end positioned close to the coil connection terminal of the AF carrier, a first extension part connecting the first support end and the connection end, a second support end supported by the other corner support end, a fixed end coupled to the AF carrier, and a second extension part connecting the second support end and the fixed end, and the signal transmission member is; It is built into the first support end, the first extension end, and the connection end, and one end is connected to the insert electrode, and the other end is connected to the coil connection terminal.

[0021] In addition, the above elastic connecting bands are symmetrical with two lens modules in between.

[0022] In addition, the two elastic connecting bands are connected through a connecting portion to form an integral body.

[0023] In addition, the spring-type FPCB further has a bending portion that can be elastically deformed according to the movement of the lens module carrier.

[0024] And, the above bending portion takes the shape of a U, V, W, or ring.

[0025] The spring-type FPBC for camera modules of the present invention, as described above, has a structure coated with a polymer film, so even after long-term use, it does not generate foreign substances due to friction with surrounding components, and there is no concern about electrical short-circuits. In addition, it has a long fatigue life, so it does not break even after long-term use, demonstrating excellent durability.

[0026] In addition, since the camera module of the present invention has a plate spring involved in the movement of the lens module implemented as a spring-type FPCB, the circuit pattern of the FPCB can be designed in various ways to control the AF carrier or OIS carrier more efficiently.

[0027] FIG. 1 is an exploded perspective view of a camera module having a built-in spring-type FPCB according to one embodiment of the present invention.

[0028] Fig. 2 is a drawing showing the OIS carrier, AF carrier, and elastic FPCB of the camera module illustrated in Fig. 1 in an exploded view.

[0029] Fig. 3 is a cutaway perspective view for explaining the structure of the spring-type FPCB of Fig. 2.

[0030] Fig. 4 is a plan view of a camera module equipped with the spring-type FPCB of Fig. 3.

[0031] FIG. 5 is a perspective view illustrating a modified example of a spring-type FPCB according to one embodiment of the present invention.

[0032] FIGS. 6A to 6C are drawings showing examples of deformation of the bending portion of the spring-type FPCB shown in FIG. 3.

[0033] Hereinafter, one embodiment according to the present invention will be described in more detail with reference to the attached drawings.

[0034] Fig. 1 is an exploded perspective view of a camera module (10) having a spring-type FPCB built in according to one embodiment of the present invention. Fig. 2 is a drawing showing the OIS carrier, the AF carrier, and the elastic FPCB of the camera module illustrated in Fig. 1 in an exploded view. In addition, Fig. 3 is a cutaway perspective view for explaining the structure of the spring-type FPCB of Fig. 2. Fig. 4 is a plan view of the camera module equipped with the spring-type FPCB of Fig. 3.

[0035] As shown in FIGS. 1 to 4, the camera module (10) according to the present embodiment includes a housing (15), a lens module (13), a lens module carrier (28), a driving unit, a spring-type FPCB (30), and a shield can (11).

[0036] The housing (15) provides an upper open receiving space (15b) and has an optical path (15e) in the center of the bottom. The housing (15) has a roughly square frame shape and is wrapped around a circuit board (17) that is part of the driving unit. The circuit board (17) is an FPCB on which a circuit for driving the camera module (10) is mounted.

[0037] The driving unit drives the lens module carrier (28) to move the lens module (13) in the direction of the optical axis and in the direction orthogonal to the optical axis.

[0038] The lens module carrier (28) is installed in a position-adjustable manner within the housing (15) and accommodates the lens module (13). The lens module carrier includes an OIS carrier (25) and an AF carrier (27). The OIS carrier (25) can move in a direction perpendicular to the optical axis, and the AF carrier (27) can be position-adjusted in the optical axis direction and has an AF coil (27e) on its outer periphery. In addition, two coil connection terminals (27k) are formed on the upper portion of the AF carrier (27), which will be described later.

[0039] The driving unit is responsible for the basic function of moving the AF carrier (27) in the direction of the optical axis and, when the OIS carrier (25) is eccentric, moving the OIS carrier to align the central axis of the lens module (13) with the central axis of the optical path (15e) of the housing.

[0040] The OIS carrier (25) may become eccentric in a direction orthogonal to the optical axis, tilt, or rotate around the optical axis due to shaking caused by hand tremors. When such unnecessary movement occurs, the OIS carrier (25) serves to return (almost instantaneously) to its normal position. This return of the OIS carrier (25) to its normal position is also due to the action of the spring-type FPCB (30). In other words, the spring-type FPCB (30) assists the driving unit.

[0041] The AF carrier (21) moves in the optical axis direction by the action of the driving unit. The reason for moving in the optical axis direction is to focus the camera on the subject. The movement of the AF carrier (21) in the optical axis direction is due to the interaction between the magnet (25e) and the AF coil (27e). The electric signal is applied to the AF coil (27e) by the spring-type FPCB (30). The spring-type FPCB also participates in the movement of the AF carrier (21).

[0042] The above driving unit includes a circuit board (17), an X driving coil (21a), a Y driving coil (22a), first and second sensors (21c, 22c), an AF coil (27e), and four magnets (25e).

[0043] The circuit board (17) is a flexible printed circuit board (FPCB) in the form of a band and is tightly fixed to the outer surface of the housing (15). The circuit board (17) is provided with a terminal portion (not shown). The terminal portion is a portion that receives power from the outside.

[0044] The X drive coil (21a) and the Y drive coil (22a) are connected to the circuit of the circuit board (17) and are exposed toward the inside of the housing (15). The X drive coils (21a) face each other with the optical path (15e) in the middle. The Y drive coils (22a) also face each other with the optical path (15e) in between. The connecting lines connecting the mutually opposing X drive coils (21a) and the connecting lines connecting the Y drive coils (22a) are orthogonal to each other.

[0045] The first and second sensors (21c, 22c) are respectively arranged on the inner side of the X drive coil (21a) and the inner side of the Y drive coil (22a). The first and second sensors (21c, 22c) detect the movement of the OIS carrier (25). That is, the first sensor (21c) detects the X-direction movement of the OIS carrier (25), and the second sensor (22c) detects the Y-direction movement of the OIS carrier (25).

[0046] In addition, the AF coil (27e) is a coil wound on the outer surface of the AF carrier (27). Both ends of the AF coil (27e) are exposed to the upper part of the AF carrier (27) through the coil connection terminal (27k). The method of exposing the AF coil (27e) can be implemented in various ways. The coil connection terminal (27k) is covered by the connection end (31e of FIG. 3) of the spring-type FPCB and is connected to the metal foil (38). Ultimately, the AF carrier (27) receives an electric signal from the outside through the spring-type FPCB (30). When the AF carrier (27) is mounted in the receiving space (25c) of the OIS carrier (25), the AF coil (27e) faces four magnets (25e).

[0047] Ultimately, when the OIS carrier (25) and the AF carrier (27) are positioned correctly within the housing (15), the AF coil (27e) and the X, Y drive coils (21a, 22a) face each other with the magnet (25e) between them. The AF coil (27e) and the X, Y drive coils (21a, 22a) share the magnet (25e).

[0048] The AF coil (27e), X drive coil (22a), and Y drive coil (22a) output electromagnetic force by power applied through the circuit board (17), and affect the facing magnet (25e).

[0049] That is, when current is applied to the X drive coil (21a), the OIS carrier (25) moves in the X direction, and when current is applied to the Y drive coil (22a), the OIS carrier (25) moves in the Y direction. The application of current to the X drive coil (21a) and the Y drive coil (22a) is performed when the first and second sensors (21c, 22c) detect the movement of the OIS carrier (25) due to the shaking of the camera module (10). In addition, when current is applied to the AF coil (27e), the movement of the AF carrier (27) in the optical axis direction is performed according to Fleming's left-hand rule.

[0050] The shield can (11) is a cover that is detachably connected to the housing (15) and has a passage (11a) in the center. The shield can (11) serves to protect the components housed in the housing (15).

[0051] Meanwhile, the housing (15) has a square frame shape and has corner supports (15a) at the four corners. The corner supports (15a) are projections protruding upward and are inserted into the projection insertion portions (31b, 33b) of the spring-type FPCB (30). The corner supports (15a) support the first support end (31a) and the second support end (33a) of each spring-type FPCB (30).

[0052] And, insert electrodes (15c) are embedded in the side of each corner support member (15a). However, only two of the four insert electrodes (15c) are used. Only two insert electrodes (15c) are connected to the circuit board (17), and the remaining two are not connected. The available insert electrodes (15c) are connected to the metal foil (38) through the fusion joint (39) illustrated in Fig. 1. The available insert electrodes (15c) are located in the diagonal direction of the housing (15).

[0053] The OIS carrier (25) is capable of moving in a direction perpendicular to the optical axis while mounted within the housing's receiving space (15b), and accommodates the AF carrier (27) within the receiving space (25c). The OIS carrier (25) includes a square-shaped carrier body (25a) and four magnets (25e). The magnets (25e) are permanent magnets.

[0054] In addition, the four corners of the carrier body (25a) are provided with upwardly open bending portion receiving grooves (25b). The bending portion receiving grooves (25b) are grooves that receive the bending portions (31c, 33c) of the spring-type FPCB (30). Since the bending portion receiving grooves (25b) are formed separately, the spring-type FPCB (30) can be sufficiently bent. Furthermore, as shown in Fig. 6, the shape of the bending portions (31c, 33c) can be changed to various shapes such as V-shape, W-shape, O-shape, etc. in addition to U-shape.

[0055] The AF carrier (27) can be positioned in the optical axis direction according to the direction of the current induced in the AF coil (27e) through interaction with the magnet (25e). The AF carrier (27) has a carrier body (27a) and an AF coil (21k).

[0056] The carrier body (27a) has two support protrusions (27d) and a connection groove (27f) on the upper surface. The support protrusions (27d) are protrusions that fit into the protrusion holes (33f) of the spring-type FPCB (30). The connection groove (27f) is a space having a coil connection terminal (27k) at its bottom. The connection ends (31e) of the two spring-type FPCBs (30) are fixed to the upper portion of the connection groove (27f). Drawing reference numeral 27b denotes an installation space where a lens module (13) is mounted. The lens module (13) is mounted in the installation space (27b) and forms one body with the AF carrier (27).

[0057] Meanwhile, the spring-type FPCB (30) is covered by the shield can (11) inside the housing (15). The spring-type FPCB (30) has two roles. One is to elastically support the lens module carrier (28), and the other is to transmit the electric signal of the insert electrode (15c) to the coil connection terminal (27k).

[0058] The spring-type FPCB (30) has an elastic connecting band (37) made of synthetic resin and a metal foil (38) as a signal transmission member.

[0059] The elastic connecting band (37) has the shape of a flat band with a certain thickness. The elastic connecting band (37) is bent while extending in the longitudinal direction to reflect the internal shape of the lens module carrier (28), and connects the housing (15) and the lens module carrier (28). The elastic connecting band (37) is elastically deformable and functions as a spring.

[0060] The above-mentioned elastic connecting band (37) has a laminated structure of a base sheet (37b) and a cover sheet (37a). The base sheet (37b) and the cover sheet (37a) are made of polyimide film. However, other types of synthetic resin films may be used as long as they have physical properties similar to those of polyimide film. The base sheet (37b) and the cover sheet (37a) are fusion-bonded to each other.

[0061] The elastic connecting band (37) has a first support end (31a), a first extension end (31d), a connecting end (31e), a second support end (33a), a second extension end (33d), a fixed end (33e), and a reinforcing end (35).

[0062] The first support end (31a) is in close contact with the upper surface of the part where the insert electrode (15c) (where the electric signal is input) is located among the four corners of the housing and is supported by the corner support end (15a). In addition, the first extension end (31d) is a part that is integrally formed with the first support end (31a) and extends toward the connection groove (27f) of the AF carrier (27). A downwardly bent bending portion (31c) is located in the first extension portion (31d). The bending portion (31c) is accommodated in the bending portion accommodation groove (25d). In addition, the connection end (31e) has a shape of an approximately square plate and is located above the coil connection terminal (27k). The connection end (31e) is fusion-bonded to the upper surface of the AF carrier (27).

[0063] And the second support end (33a) is installed at the side corner of the corner where the first support end (31a) is installed and is supported by the corner support end (15a). The second extension end (33d) is a belt-shaped portion that is integral with the second support end (33a) and extends toward the support protrusion (27d) of the AF carrier. The fixed end (33e) is a portion that is integral with the end of the second extension end (33d) and has a protrusion hole (33f). The support protrusion (27d) of the AF carrier is fitted into the protrusion hole (33f). The two spring-type FPCBs (30) are symmetrical with the lens module in between.

[0064] The reinforcing member (35) connects the first extension member (31d) and the second extension member (33d) and serves to maintain the gap between the first and second extension members (31d, 33d).

[0065] The signal transmission member is accommodated inside the elastic connecting band and guides an electric signal applied from the outside to the lens module carrier. In this embodiment, a metal foil (38) is applied. The metal foil (38) may be a copper plate.

[0066] The metal foil (38) is embedded in the first support end (31a), the first extension end (31d), and the connection end (31e), and one end is connected to the insert electrode through a fusion connection part (39), and the other end is connected to the coil connection terminal (27k). The connection method may be fusion or soldering.

[0067] The above spring-type FPCB (30) is a pair of two and is symmetrical with respect to the lens module (13). The spring-type FPCB (30) elastically restrains the AF carrier and the OIS carrier so that the central axis of the lens module (13) is parallel to the optical axis and coincides with the center of the optical path.

[0068] The 'optical axis' refers to a straight line component of incident light from a subject to an image sensor (not shown) (installed below the optical path (15e) of the housing (15)), and means a direction perpendicular to the image sensor. In addition, the 'central axis' of the lens module is a straight line connecting the centers of a plurality of lenses built into the lens module. In a standby state (a state in which no external force is applied), the 'central axis' passes through the center point of the optical path (15e). In addition, the 'center point' of the optical path is the center of a circle drawn by the inner surface of the optical path.

[0069] Meanwhile, the above-described bending portion (31c, 33c) elastically deforms according to the movement of the OIS carrier (25). For example, when the OIS carrier (25) moves, tilts, or rotates in a direction orthogonal to the optical axis, it elastically changes and applies an elastic restoring force to the OIS carrier (25). The elastic restoring force refers to an elastic force that positions the OIS carrier (25) correctly.

[0070] Since the spring-type FPCB is made of synthetic resin film, it has superior flexibility compared to conventional metal materials such as plate springs. In addition, since the spring-type FPCB is configured with a metal foil (38) patterned inside a polyimide film, the circuit shape can be designed more freely than with conventional plate springs. Accordingly, the degree of structural design freedom is dramatically expanded compared to the shape of conventional plate springs.

[0071] FIG. 5 is a perspective view showing a modified example of a spring-type FPCB (30) according to one embodiment of the present invention.

[0072] The spring-type FPCB (30) illustrated in Fig. 5 is a type in which two spring-type FPCBs are integrally formed through a connecting portion (32). The connecting portion (32) is identical to the tanlock connecting band (37). In other words, the connecting portion (32) also has a laminated structure of a base sheet (37b) and a cover sheet (37a).

[0073] The spring-type FPCB (30) of Fig. 5 is manufactured by laying down a single base sheet (37b), forming two metal foils (38) thereon, and then laminating and fusing a cover sheet (37a) thereon. After fusing, the spring-type FPCB is cut out through a cutting process, and bending portions (31c, 33c) and protruding holes (33f) are formed.

[0074] FIGS. 6A to 6C are drawings showing examples of deformation of the bending portion of the spring-type FPCB shown in FIG. 3.

[0075] The bending portions (31c, 33c) illustrated in Fig. 6a have a V-shape, and the bending portions (31c, 33c) illustrated in Fig. 6b have an approximate W-shape. Furthermore, the bending portions (31c, 33c) illustrated in Fig. 6c have a ring-shaped shape. These shapes are merely examples, and the shapes of the bending portions (31c, 33c) may vary as long as the spring-type FPCB can output elastic support force.

[0076] Above, the present invention has been described in detail through specific examples, but the present invention is not limited to the above examples, and various modifications are possible by a person of ordinary skill within the scope of the technical idea of ​​the present invention.

[0077] The present invention can be used in a portable electronic device equipped with a camera.

Claims

1. A camera module including a housing and a lens module carrier that is positionally adjustable and accommodates a lens module, and elastically supports the lens module carrier while built into the housing. An elastic connecting band having a certain thickness, being elastically deformable, and extending in the longitudinal direction to connect the housing and the lens module carrier; A signal transmission member is included that is accommodated inside the above elastic connecting band and guides an electric signal applied from the outside to the lens module carrier. Spring type FPCB for camera module.

2. In paragraph 1, The above elastic connecting band is, It is made of synthetic resin and has a film-type base sheet and cover sheet that are mutually fused and bonded with a signal transmission member in between. Spring type FPCB for camera module.

3. In paragraph 2, The above base sheet and cover sheet are polyimide films having a certain thickness, The signal transmission member is a metal foil interposed between the base sheet and the cover sheet. Spring type FPCB for camera module.

4. In paragraph 1, The above spring-type FPCB further has a bending portion that can be elastically deformed according to the movement of the lens module carrier. Spring type FPCB for camera module.

5. In paragraph 4, The above bending portion has a U-shape, a V-shape, a W-shape, or a ring shape and has a concave shape toward the bottom. Spring type FPCB for camera module.

6. A housing that provides an open receiving space at the top and has an optical passage formed therein; A lens module accommodated inside the housing; A lens module carrier that is installed in a position-adjustable manner within the housing and accommodates the lens module; A driving unit that drives a lens module carrier to move the lens module in the direction of the optical axis and in a direction orthogonal to the optical axis; A spring-type FPCB having an elastic connecting band that is elastically deformable and extends in the longitudinal direction to connect the housing and the lens module carrier while being installed inside the housing, and a signal transmission member that is accommodated inside the elastic connecting band and guides an electric signal applied from the outside to the lens module carrier. Camera module.

7. In paragraph 6, The above elastic connecting band is, It is made of synthetic resin and has a film-type base sheet and cover sheet that are mutually fused and bonded with a signal transmission member in between. Camera module.

8. In paragraph 7, The above base sheet and cover sheet are polyimide films having a certain thickness, The signal transmission member is a metal foil interposed between the base sheet and the cover sheet. Camera module.

9. In paragraph 6, The above housing has a square frame shape, and the four corners of the housing are provided with corner supports that support the ends of the spring-type FPCB and insert electrodes that output electric signals. The lens module carrier is; It has an OIS carrier that can move in a direction perpendicular to the optical axis, and an AF carrier that can be positioned in the direction of the optical axis, has an AF coil wound around the outer periphery, and has a coil connection terminal provided on the upper part to connect to the AF coil. Elastic connecting band; It has a first support end supported by one corner support, a connection end positioned close to a coil connection terminal of an AF carrier, a first extension part connecting the first support end and the connection end, a second support end supported by the other corner support, a fixed end coupled to the AF carrier, and a second extension part connecting the second support end and the fixed end. Absence of signal transmission; Built into the first support end, the first extension end, and the connection end, one end is connected to the insert electrode, and the other end is connected to the coil connection terminal. Camera module.

10. In paragraph 9, The above elastic connecting bands are symmetrical with two lens modules in between. Camera module.

11. In paragraph 10, The above two elastic connecting bands are connected through a connecting portion to form an integral body. Camera module.

12. In paragraph 6, The above spring-type FPCB further has a bending portion that can be elastically deformed according to the movement of the lens module carrier. Camera module.

13. In paragraph 8, The above bending part takes the shape of a U, V, W or ring. Camera module.

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