TWI636315B - Camera module and image capturing unit thereof - Google Patents

Abstract

An image capturing unit includes a base, a frame, a lens carrier, a first magnet, a first coil, a second magnet, and a second coil. The frame is movably connected to the base, and the lens carrier is movably disposed in the frame for receiving a lens. The first magnet is disposed on the base, and the first coil is disposed on the frame. When a current is applied to the first coil, a magnetic force is generated between the first magnet and the first coil to force the frame and the lens carrier to move relative to the base. . The second magnet is disposed on the frame, and the second coil is disposed on the lens carrier. When a current is applied to the second coil, a magnetic force is generated between the second magnet and the second coil to force the lens carrier to move relative to the frame.

Description

 Camera module and image capturing unit thereof  

The invention relates to a camera module, in particular to a camera module with a magnet element.

In the existing dual-lens camera module, the positions of the two image capturing units are usually relatively close, so the magnets disposed in different lens driving modules are prone to magnetic interference, so that The focus speed and accuracy of the lens on which the lens holder moves are affected; in addition, in a camera module having only a single image capturing unit, the internal magnet is also susceptible to magnetic interference with other components. In view of this, how to reduce the magnetic interference generated by the magnetic components inside the camera module has become an important issue.

In view of the above problems, an object of the present invention is to provide an image capturing unit including a base, a frame, a lens carrier, a first magnet, a first coil, a second magnet, and a The second coil. The frame is movably connected to the base, and the lens carrier is movably disposed in the frame for receiving a lens. The first magnet is disposed on the base, and the first coil is disposed on the frame, wherein when a current is applied to the first coil, a magnetic force is generated between the first magnet and the first coil to force the frame and the lens carrier relative to the base mobile. The second magnet is disposed on the frame, and the second coil is disposed on the lens carrier. When a current is applied to the second coil, a magnetic force is generated between the second magnet and the second coil to force the lens carrier to move relative to the frame.

In one embodiment, when the first coil is applied with current, the frame and lens carrier move in a first direction relative to the base, and the first direction is perpendicular to one of the optical axes of the lens.

In an embodiment, when the second coil is applied with current, the lens carrier moves in a second direction relative to the frame, and the second direction is perpendicular to the first direction.

In an embodiment, the image capturing unit further includes a third magnet and a third coil. The third magnet is disposed on the frame, and the third coil is disposed on the base. When the third coil is applied with current, The magnetic force generated between the third magnet and the third coil forces the frame and the lens carrier to move relative to the base.

In one embodiment, the first coil and the third magnet respectively have a bottom surface corresponding to the first magnet and the third coil, and the bottom surfaces of the first coil and the third magnet are aligned with each other.

In one embodiment, the first magnet and the third coil respectively have a top surface corresponding to the first coil and the third magnet, and the top surfaces of the first magnet and the third coil are aligned with each other.

In one embodiment, the image capturing unit further includes a driving board, and the third coil is fixed to the driving board, wherein the driving board has a C-shaped structure, and the first magnet is located at one of the openings of the C-shaped structure.

In an embodiment, the image capturing unit further includes a third magnet and a third coil. The third magnet is disposed on the base, and the third coil is disposed on the frame. When the third coil is applied with current, The magnetic force generated between the third magnet and the third coil forces the frame and the lens carrier to move relative to the base.

In one embodiment, the first coil and the second magnet at least partially overlap when viewed in a direction perpendicular to the optical axis of one of the lenses.

In one embodiment, at least one of the first and second magnets is a multi-pole magnet.

In an embodiment, the present invention further provides a camera module, comprising two image capturing units as described above, wherein the first magnet and the first coil of the image capturing unit are respectively located in the image capturing unit Adjacent sides.

In one embodiment, the first magnets in the image capturing unit are integrally formed and integrated into a single member.

In one embodiment, the first magnet is integrally formed and integrated into a six-pole magnet.

In one embodiment, the base in the image capturing unit is integrally formed and integrated into a single member.

In an embodiment, the present invention further provides a camera module, comprising the image capturing unit and a camera unit as described above, wherein the image capturing unit and the camera unit are arranged along a long axis direction, and the first magnet and The first coil is disposed in the image capturing unit adjacent to one side of the camera unit.

1, 1', 2, 2' ‧ ‧ image capture unit

10, 10’‧‧‧ Shell

12, 22‧‧‧ openings

20, 20’ ‧ ‧ pedestal

30‧‧‧Lens carrier

32‧‧‧through holes

40‧‧‧second coil

50‧‧‧Frame

52A, 52B, 52C‧‧‧ side walls

60‧‧‧First coil

62, 62'‧‧‧ first magnet

64‧‧‧second magnet

66‧‧‧ Third magnet

70‧‧‧Upper reed

72‧‧‧Reed

74‧‧‧Flexible components

80, 80'‧‧‧ circuit substrate

82‧‧‧ Magnetic field sensing components

90‧‧‧Drive board

91‧‧‧ openings

94‧‧‧third coil

M, M’‧‧‧ camera module

O‧‧‧ optical axis

FIG. 1 is a schematic diagram showing a camera module according to an embodiment of the invention.

Fig. 2 shows an exploded view of the image capturing unit 1 in Fig. 1.

Fig. 3 is a cross-sectional view taken along line A-A of Fig. 1.

Fig. 4 is a cross-sectional view taken along line B-B of Fig. 1.

FIG. 5 is a schematic diagram showing the relative positional relationship between the magnets, the coils, and the lens carrier of the two image capturing units 1, 2.

FIG. 6 is a schematic view showing the relative positional relationship between the magnets, the coils, the lens holders and the driving plates of the two image capturing units 1, 2.

FIG. 7 is a schematic diagram showing the relative positional relationship between the magnet, the coil, the lens carrier and the driving plate in the image capturing units 1, 2 according to another embodiment of the present invention.

Figure 8 is a diagram showing a camera module in accordance with another embodiment of the present invention.

Figure 9 shows an exploded view of the camera module in Figure 8.

Fig. 10 is a view showing the six-pole magnet and the first driving coil in Fig. 9.

The camera module of the embodiment of the present invention will be described below. However, it will be readily understood that the embodiments of the present invention are susceptible to many specific embodiments of the invention and can The specific embodiments disclosed are merely illustrative of the invention, and are not intended to limit the scope of the invention.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning meaning It will be understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the relevant art and the context or context of the present disclosure, and should not be in an idealized or overly formal manner. Interpretation, unless specifically defined herein.

Please refer to FIG. 1 . The camera module M of the embodiment of the present invention includes two image capturing units 1 and 2 arranged along a long axis direction, which can be disposed, for example, on a handheld electronic device (eg, a camera or a mobile phone). Or tablet, etc.) to capture images. Please refer to Figures 1 to 4 together, where Figure 2 shows the exploded view of the image capture unit 1 in Figure 1, Figure 3 shows the cross-sectional view along the AA line in Figure 1, and Figure 4 shows the 1 is a cross-sectional view of the BB line segment. As can be seen from FIG. 2, the image capturing unit 1 mainly includes a casing 10, a base 20, a lens carrier 30, a first coil 60, a second coil 40, a frame 50, and a first magnet. 62. At least one second magnet 64, a third magnet 66, an upper reed 70, a lower reed 72, a plurality of elastic members 74, a circuit substrate 80, a plurality of magnetic field sensing elements 82, and a driving plate 90.

The housing 10 and the base 20 are coupled to each other for receiving other components in the image capturing unit 1. An image sensing component (for example, a CCD) is disposed under the base 20, and the lens housing 30 is disposed in the lens carrier 30. A lens (not shown) can be focused with the image sensing element in the direction of the optical axis O of the lens. Moreover, the outer casing 10 and the base 20 are respectively formed with an opening 12 and an opening 22, and external light can enter the image capturing unit 1 through the opening 12 and pass through the lens, and then the light can exit the image capturing unit through the opening 22. 1 arrive at the aforementioned image sensing element.

In this embodiment, the lens is fixed in the through hole 32 of the lens carrier 30, and the second coil 40 is disposed on the outer surface of the lens carrier 30, wherein the lens carrier 30 and the lens therein are permeable. The reed 70 and the lower reed 72 (e.g., metal domes) are coupled to the frame 50, thereby allowing the lens carrier 30 and the lens to be movably disposed within the frame 50.

As shown in FIG. 2, the driving board 90 of the present embodiment has a C-shaped structure, which is fixed to the circuit board 80 through a bonding manner and can be electrically connected to the circuit board 80. The first magnet 62 is disposed on the circuit board 80. The base 20 is located at one of the openings 91 of the drive plate 90. Referring to FIGS. 2 to 4 together, the first coil 60 is fixed to a side wall 52A parallel to the Y-axis direction of the frame 50, and corresponds to the first magnet 62; further, two second magnets 64 are attached. Two side walls 52B parallel to the X-axis direction are respectively fixed to the frame 50, and correspond to the second coil 40 on the lens holder 30 and the two third coils 94 disposed inside the driving board 90 (Fig. 3) The third magnet 66 is another side wall 52C that is fixed to the frame 50 and is parallel to the Y-axis direction, and corresponds to another third coil 94 (FIG. 4) provided inside the driving board 90.

With the above design, when the second coil 40 on the lens holder 30 is applied with a current, it can generate a magnetic force with the second magnet 64 fixed to the frame 50 to force the lens holder 30 and the aforementioned lens relative to the frame. 50 moves along the optical axis O direction (Z-axis direction) of the lens, thereby performing autofocus between the lens and the image sensing element.

It should be particularly noted that the four elastic members 74 (for example, metal rods) in FIG. 2 are connected to the frame 50 and the base 20, so that the frame 50, the lens holder 30 and the aforementioned lens are movably disposed on the base. Above 20. In addition, the circuit board 80 is, for example, a C-shaped flexible printed circuit board that is fixed to the susceptor 20 by adhesive bonding, and is controlled by the elastic member 74 and one of the outside of the image capturing unit 1. The unit (not shown) is electrically connected; thereby, the control unit can be electrically connected to the second coil 40 on the lens carrier 30 through the circuit substrate 80 and the upper reed 70, thereby applying current to the second coil 40. The lens carrier 30 is driven to generate a magnetic force between the second coil 40 and the two second magnets 64, and the lens is displaced relative to the frame 50 in the optical axis O direction (Z-axis direction) of the lens.

In the present embodiment, when the frame 50 is subjected to an external force to cause the lens to be displaced in the horizontal direction (parallel to the XY plane) with respect to the susceptor 20, the magnetic field sensing element 82 disposed on the susceptor 20 can be sensed. The horizontal offset of the frame 50 relative to the base 20 and current can be applied to the first coil 60 on the frame 50 and the third coil 64 in the drive plate 90, respectively, to cause the first, second, and third magnets 62. , 64, 66 and the first and third coils 60, 64 generate a magnetic force, thereby driving the frame 50, the lens carrier 30 and the lens located therein to move back to the preset position in the horizontal direction, thereby achieving optical protection The effect of optical image stabilization. For example, the magnetic field sensing element 82 is, for example, a Hall effect sensor, a MR sensor, or a Fluxgate.

Please refer to the figures 1, 5, and 6 together. The magnets and coils in the image capturing unit 2 can adopt the same or similar configuration as the image capturing unit 1. As shown in FIGS. 5 and 6, the first coil 60 and the first magnet 62 in the image capturing units 1, 2 are disposed on both sides adjacent to each other, since the two first magnets 62 are fixed to the first A pedestal 20 under the coil 60, so that no relative movement occurs between the two first magnets 62 in the image capturing units 1, 2, so that the two first magnets 62 can be effectively prevented from being close to each other. Magnetic interference between each other.

It should be noted that the first coil 60 and the third magnet 66 respectively have a bottom surface facing the first magnet 62 and the third coil 94, wherein the bottom surfaces have the same height in the Z-axis direction and are aligned with each other. Similarly, the first magnet 62 and the third coil 94 respectively have a top surface facing the first coil 60 and the third magnet 66, wherein the top surfaces have the same height in the Z-axis direction and are aligned with each other. Further, the first coil 60 and the second magnet 64 at least partially overlap in the Z-axis direction (height direction) as viewed in the horizontal direction (parallel to the XY plane) perpendicular to the optical axis O of the lens.

In another embodiment, as shown in FIG. 7, only the first magnet 62 in the image capturing unit 1 may be disposed under the first coil 60, and the first magnet in the image capturing unit 2 may be disposed. 62 is disposed on the frame 50 above the first coil 60. The first coil 60 in the image capturing unit 2 is embedded in the driving board 90 above the base 20 like the third coil 94, thereby adding two The distance between the first magnets 62 is to reduce magnetic interference. It should be understood that the first, second, and third magnets 62, 64, and 66 in the foregoing embodiments may employ multipolar magnets, such as the quadrupole magnets shown in FIGS. -pole magnet), thereby further reducing the magnetic interference between the magnets, and the use of multi-pole magnets can also have the advantages of increasing the electromagnetic driving force, reducing the size of the camera module, and reducing the manufacturing cost. Alternatively, the third magnet 60 may be exchanged with the third coil 94. The third magnet 60 may be disposed on the base 20 and the third coil 94 may be disposed on the frame 50. The frame 50 and the lens holder 30 are moved relative to the base 20 to achieve an optical anti-shake effect.

As previously mentioned, when a current is applied to the first coil 60, a magnetic force can be generated between the first magnet 62 and the first coil 60 forcing the frame 50 and the lens carrier 30 relative to the base 20 in a direction parallel to the XY plane. (first direction) moving, thereby achieving the effect of optical anti-shake; similarly, when the third coil 94 is applied with current, a magnetic force may be generated between the third coil 94 and the corresponding third magnet 66 to force the frame 50 And the lens carrier 30 moves relative to the susceptor 20 in a direction parallel to the XY plane (first direction), thereby achieving an optical anti-shake effect. In addition, when a current is applied to the second coil 40, a magnetic force is generated between the second magnet 64 and the second coil 40 to force the lens holder 30 and the lens relative to the frame 50 in a direction parallel to the optical axis O (second Direction) Move to achieve the effect of autofocus.

Referring to Figures 8 and 9, together, Figure 8 shows a schematic diagram of a camera module M' according to another embodiment of the present invention, and Figure 9 shows an exploded view of the camera module M' of Figure 8. It can be seen from the figures 8 and 9 that the camera module M' of the embodiment includes two image capturing units 1', 2' which are different from the image capturing units 1, 2 in that: In the image capturing unit 1', 2' of the embodiment, the pair of the outer casing 10', the base 20', the first magnet 62', the circuit board 80', and the driving board 90' are all integrally formed. And integration into a single component.

For example, the two first magnets 62 ′ in the image capturing units 1 ′ and 2 ′ can be integrally formed into a six-pole magnet, and the image capturing unit is integrated. The two bases 20' of 1', 2' can also be integrally formed into a single member, wherein a recess 24 for receiving the first magnet 62' can be formed on the single member, such that Not only can it improve the convenience of assembly, but also greatly reduce the assembly cost and facilitate the miniaturization of the camera module M'.

As shown in FIG. 10, the two first magnets 62' of the image capturing units 1', 2' can be integrally formed into a six-pole magnet, and simultaneously The two first coils 60 in the image capturing units 1', 2' can avoid the problem of magnetic interference between the two. It should be understood that when the two first coils 60 in FIG. 10 are applied with current, a magnetic force may be generated between the six-pole magnet and the upper two first coils 60 to force the image capturing unit 1' The frame 50 and the lens carrier 30 in 2' are respectively moved in the horizontal direction with respect to the base 20' thereof, so that the two image capturing units 1', 2' can achieve the optical anti-shake effect. Moreover, the problem of magnetic interference between the two image capturing units 1', 2' can be avoided at the same time.

In summary, the present invention provides a camera module, wherein the camera module includes at least one image capturing unit, wherein the first magnet in the image capturing unit is disposed on a fixed base, and the first coil is It is disposed on a frame movable relative to the base, thereby avoiding magnetic interference between the first magnet and other magnetic elements. In an embodiment, the camera module may further include another image capturing unit (camera unit), wherein the first magnet and the first coil in the image capturing unit are respectively disposed on the fixed base and The first magnet and the first coil are disposed on one side of the image capturing unit adjacent to the other image capturing unit (the camera unit), and the image capturing unit and the image capturing unit are avoided. The problem of magnetic interference between the other image capturing units (camera units) can also contribute to the miniaturization of the entire camera module.

While the embodiments of the present invention and its advantages are disclosed hereinabove, it is understood that those skilled in the art can make modifications, substitutions and refinements without departing from the spirit and scope of the invention. In addition, the scope of the present invention is not limited to the processes, machines, manufacture, compositions, devices, methods, and steps in the specific embodiments described in the specification. Any one of ordinary skill in the art can. The processes, machines, fabrications, compositions, devices, methods, and procedures that are presently or in the future are understood to be used in accordance with the present invention as long as they can perform substantially the same function or achieve substantially the same results in the embodiments described herein. Accordingly, the scope of the invention includes the above-described processes, machines, manufactures, compositions, devices, methods, and steps. In addition, the scope of each of the claims constitutes an individual embodiment, and the scope of the invention also includes the combination of the scope of the application and the embodiments.

While the invention has been described above in terms of several preferred embodiments, it is not intended to limit the invention. Those skilled in the art having the ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. In addition, each patent application scope is constructed as a separate embodiment, and various combinations of patents and combinations of embodiments are within the scope of the invention.

Claims (17)

An image capturing unit includes: a base; a frame movably connected to the base; a lens carrier movably disposed in the frame for receiving a lens; a first magnet disposed on the base a first coil disposed on the frame, wherein when a current is applied to the first coil, a magnetic force is generated between the first magnet and the first coil to force the frame and the lens carrier relative to the base Moving a seat; a second magnet disposed on the frame; and a second coil disposed on the lens carrier, wherein when the second coil is applied with current, between the second magnet and the second coil Generating a magnetic force forces the lens carrier to move relative to the frame, wherein the first magnet does not overlap the second magnet as viewed in a direction perpendicular to the optical axis of the lens. The image capturing unit of claim 1, wherein when the first coil is applied with current, the frame and the lens carrier move in a first direction relative to the base, and the first direction Vertical to one of the optical axes of the lens. The image capturing unit of claim 2, wherein when the second coil is applied with current, the lens carrier moves in a second direction relative to the frame, and the second direction is perpendicular to the first One direction. The image capturing unit of claim 1, wherein the image is The capturing unit further includes a third magnet and a third coil, the third magnet is disposed on the frame, and the third coil is disposed on the base, and when the third coil is applied with current, the third A magnetic force is generated between the magnet and the third coil to force the frame and the lens carrier to move relative to the base. The image capturing unit of claim 4, wherein the first coil and the third magnet respectively have a bottom surface corresponding to the first magnet and the third coil, and the first coil and the first The bottom surfaces of the three magnets are aligned with each other. The image capturing unit of claim 4, wherein the first magnet and the third coil respectively have a top surface corresponding to the first coil and the third magnet, and the first magnet and the first magnet The top surfaces of the third coil are aligned with each other. The image capturing unit of claim 4, wherein the image capturing unit further comprises a driving board, and the third coil is fixed to the driving board, wherein the driving board has a C-shaped structure, and The first magnet is located at an opening of the C-shaped structure. The image capturing unit of claim 1, wherein the image capturing unit further includes a third magnet and a third coil, the third magnet is disposed on the base, and the third coil is disposed. On the frame, when a current is applied to the third coil, a magnetic force is generated between the third magnet and the third coil to force the frame and the lens carrier to move relative to the base. The image capturing unit of claim 1, wherein the image capturing unit is vertical The first coil and the second magnet at least partially overlap when viewed in the direction of the optical axis of the lens. The image capturing unit of claim 1, wherein at least one of the first and second magnets is a multi-pole magnet. A camera module includes two image capturing units, each of the image capturing units including: a base; a frame movably connecting the base; and a lens carrier movably disposed on the frame a first magnet is disposed on the base; a first coil is disposed on the frame, wherein the first magnet and the first when the first coil is applied with current Magnetic force is generated between the coils to force the frame and the lens carrier to move relative to the base; a second magnet is disposed on the frame; and a second coil is disposed on the lens carrier, wherein the second When a current is applied to the coil, a magnetic force is generated between the second magnet and the second coil to force the lens carrier to move relative to the frame, wherein the first magnets and the first coils of the image capturing units They are respectively located on two sides adjacent to each other of the image capturing units. The camera module of claim 11, wherein the first magnets of the image capturing units are integrally formed and integrated into a single member. The camera module of claim 12, wherein the first magnets are integrally formed and integrated into a six-pole magnet. The camera module of claim 11, wherein the bases of the image capturing units are integrally formed and integrated into a single member. A camera module includes an image capturing unit and a camera unit, wherein the image capturing unit and the camera unit are arranged along a long axis direction, wherein the image capturing unit comprises: a base; a frame, movablely connected a pedestal; a lens carrier movably disposed in the frame for receiving a lens; a first magnet disposed on the base; a first coil disposed on the frame, wherein the first When a coil is applied with current, a magnetic force is generated between the first magnet and the first coil to force the frame and the lens carrier to move relative to the base; a second magnet is disposed on the frame; and a second a coil disposed on the lens carrier, wherein when a current is applied to the second coil, a magnetic force is generated between the second magnet and the second coil to force the lens carrier to move relative to the frame, wherein the first magnet And the first coil is disposed in the image capturing unit adjacent to one side of the camera unit. An image capturing unit includes: a pedestal; a frame movably connected to the pedestal; a lens carrier movably disposed in the frame for receiving a lens; a first magnet disposed on the pedestal; a first coil, Provided on the frame, wherein when a current is applied to the first coil, a magnetic force is generated between the first magnet and the first coil to force the frame and the lens carrier to move relative to the base; a second magnet, Provided on the frame; a second coil is disposed on the lens carrier, wherein when a current is applied to the second coil, a magnetic force is generated between the second magnet and the second coil to force the lens carrier relative to Moving the frame; a third magnet disposed on the frame; and a third coil disposed on the base, wherein when the third coil is applied with current, between the third magnet and the third coil Generating a magnetic force to force the frame and the lens carrier to move relative to the base, wherein a driving direction of the first magnet and the first coil and a driving direction of the third magnet and the third coil are perpendicular to a light of the lens axis. An image capturing unit includes: a base; a frame movably connected to the base; a lens carrier movably disposed in the frame for receiving a lens; a first magnet disposed on the base Seat a first coil disposed on the frame, wherein when a current is applied to the first coil, a magnetic force is generated between the first magnet and the first coil to force the frame and the lens carrier to move relative to the base; a second magnet is disposed on the frame; a second coil is disposed on the lens carrier, wherein when a current is applied to the second coil, a magnetic force is generated between the second magnet and the second coil to force the The lens carrier moves relative to the frame; a third magnet is disposed on the frame; and a third coil is disposed on the base, wherein the third magnet is coupled to the third coil when current is applied thereto A magnetic force is generated between the third coils to force the frame and the lens carrier to move relative to the base, wherein a driving direction of the first magnet and the first coil is the same as a driving direction of the third magnet and the third coil direction.