KR20210151763A - A lens moving unit, and camera module and optical instrument including the same - Google Patents

Abstract

The embodiment of the present invention includes: a housing; a bobbin disposed inside the housing and movable in an optical axis direction; a position sensor disposed on a first side of the housing; and a magnet corresponding to the position sensor and placed on the bobbin, wherein a first distance between an outer surface of the first side of the housing and a center of the bobbin is greater than a second distance between the outer surface of the first side of the housing and the center of the housing, each of the center of the bobbin and the center of the housing is a center in a plane perpendicular to the optical axis. Accordingly, it is possible to secure a sufficient space for mounting the position sensor.

Description

A lens driving device, and a camera module and optical device including the same

The embodiment relates to a lens driving device, a camera module and an optical device including the same.

Since it is difficult to apply the technology of a voice coil motor (VCM) used in an existing general camera module to a camera module for ultra-small size and low power consumption, research related thereto has been actively conducted.

Demand and production of electronic products such as smartphones and camera-equipped cell phones are increasing. Cameras for mobile phones are on the trend of high resolution and miniaturization, and accordingly, actuators are becoming smaller, larger diameter, and multi-functional. In order to implement a high-resolution mobile phone camera, additional functions such as performance improvement of mobile phone camera, auto focusing, shutter shake improvement, and zoom function are required.

The embodiment provides a lens driving device capable of securing a sufficient space for mounting a position sensor, improving a degree of freedom in design, and reducing magnetic field interference, a camera module including the same, and an optical device.

A lens driving device according to an embodiment includes a housing; a bobbin disposed inside the housing and movable in an optical axis direction; a position sensor disposed on a first side of the housing; and a magnet corresponding to the position sensor and disposed on the bobbin, wherein a first distance between an outer surface of the first side of the housing and a center of the bobbin is between the outer surface of the first side of the housing and the greater than a second distance between the centers of the housing, wherein each of the center of the bobbin and the center of the housing is a center in a plane perpendicular to the optical axis.

wherein the first distance is greater than a third distance between the centers of the bobbins on the outer surface of the second side of the housing, and the second side of the housing is located opposite the first side of the housing with respect to the optical axis. can

a distance between the first outer surface of the bobbin and the center of the bobbin is greater than a distance between the first outer surface of the bobbin and the center of the housing, and the first outer surface of the bobbin is at the first side of the housing It may be an outer surface corresponding to .

the housing includes a second side positioned opposite the first side of the housing with respect to the optical axis, wherein a first horizontal length of the first side of the housing is equal to that of the second side of the housing It may be greater than a length of a first horizontal direction, and the first horizontal direction may be a direction from the first side of the housing toward the second side of the housing.

the housing includes a second side positioned opposite the first side of the housing with respect to the optical axis, the center of the bobbin being positioned between the center of the housing and the second side of the housing can

The lens driving device may include a circuit board disposed on the first side of the housing and electrically connected to the position sensor.

The magnet may be disposed on a first outer surface of the bobbin opposite to the first side of the housing. A groove for arranging the magnet may be formed in the first outer surface of the bobbin.

The position sensor may be an integrated circuit (IC) including a hall sensor and a driver. A distance between the circuit board and the center of the bobbin may be greater than a second distance between the circuit board and the center of the housing.

A lens driving device according to another embodiment includes a housing; a bobbin disposed inside the housing and movable in an optical axis direction; a circuit board disposed on a first side of the housing; a position sensor disposed on the first side of the housing and electrically connected to the circuit board; and a magnet corresponding to the position sensor and disposed on the bobbin, wherein a first distance between the circuit board and a center of the bobbin is greater than a second distance between the circuit board and a center of the housing, the center of the bobbin and Each of the centers of the housing is a center in a plane perpendicular to the optical axis. the housing includes a second side positioned opposite the first side of the housing with respect to the optical axis, wherein a first horizontal length of the first side of the housing is equal to that of the second side of the housing It may be greater than a length of a first horizontal direction, and the first horizontal direction may be a direction from the first side of the housing toward the second side of the housing.

The embodiment may secure a sufficient space for mounting the position sensor, improve the degree of freedom in design, and reduce magnetic field interference.

1 is a perspective view of a lens driving device according to an embodiment.
FIG. 2 is an exploded view of the lens driving device of FIG. 1 .
FIG. 3A is a cross-sectional view of the lens driving device shown in FIG. 1 in a direction perpendicular to an optical axis.
3B shows the relationship between the fixing part and the center of the bobbin.
4 shows the distance relationship between the center of the fixing part, the center of the bobbin, the first side of the fixing part, and the first outer surface of the bobbin.
5A illustrates a first magnet and a second magnet according to another exemplary embodiment.
FIG. 5B is an enlarged view of the first magnet and the second magnet shown in FIG. 5A .
6A shows the upper elastic member shown in FIG. 2 .
Figure 6b shows the lower elastic member shown in Figure 2;
FIG. 7 shows an embodiment of the position sensor shown in FIG. 2 .
8 is a cross-sectional view of an optical device including the lens driving device according to the embodiment of FIG. 4 .
9 shows an embodiment of a dual camera module according to an embodiment.
10 is a cross-sectional view taken in the AB direction of the lens driving device shown in FIGS. 1 and 3B.
11 is an exploded perspective view of a camera module according to an embodiment.
12 is a perspective view of a portable terminal according to an embodiment.
13 is a block diagram of the portable terminal shown in FIG. 12 .

Hereinafter, embodiments of the present invention that can specifically realize the above object will be described with reference to the accompanying drawings.

In the description of the embodiment, in the case where it is described as being formed on "on or under" of each element, the upper (upper) or lower (lower) (on or under) is The two elements are in direct contact with each other or one or more other elements are disposed between the two elements indirectly. In addition, when expressed as "up (up) or down (on or under)", it may include the meaning of not only an upward direction but also a downward direction based on one element.

In addition, as used hereinafter, relational terms such as “first” and “second”, “upper/upper/above” and “lower/lower/below” refer to any physical or logical relationship or order between such entities or elements. may be used only to distinguish one entity or element from another, without necessarily requiring or implying that Also, like reference numerals refer to like elements throughout the description of the drawings.

In addition, terms such as "include", "compose", or "have" described above mean that the corresponding component may be embedded unless otherwise stated, so other components are excluded. Rather, it should be construed as being able to include other components further.

Hereinafter, a lens driving apparatus according to an embodiment will be described with reference to the accompanying drawings. For convenience of description, the lens driving apparatus according to the embodiment is described using a Cartesian coordinate system (x, y, z), but may be described using other coordinate systems, and the embodiment is not limited thereto. In each figure, the x-axis and y-axis refer to directions perpendicular to the z-axis, which is the optical axis direction, the z-axis direction, which is the optical axis direction, is called a 'first direction', and the x-axis direction is called a 'second direction', and y The axial direction may be referred to as a 'third direction'.

The lens driving device according to the embodiment may perform an “auto-focusing function”.

'Auto-focusing' refers to automatically focusing the image of the subject on the image sensor surface.

1 is a perspective view of a lens driving device 100 according to an embodiment, FIG. 2 is an exploded view of the lens driving device 100 of FIG. 1 , and FIG. 3A is a lens driving device 100 shown in FIG. A cross-sectional view is shown in a direction perpendicular to the optical axis.

1 to 3 , the lens driving device 100 includes a bobbin 110 , a coil 120 , a magnet 130 , a housing 140 , an upper elastic member 150 , and a lower elastic member 160 . ), a circuit board 190 , a position sensor 170 , and a sensing magnet 180 .

In addition, the lens driving device 100 may further include a balancing magnet 185 , a cover member 300 , and a base 210 .

First, the cover member 300 will be described.

The cover member 300 has an open lower portion, may be in the form of a box including an upper plate and side plates, and may cover the housing 140 and the bobbin 110 , and the lower portion of the cover member 300 is the base 210 . It can be combined with the upper part.

The shape of the upper plate of the cover member 300 may be a polygon, for example, a square or an octagon, and may have an opening for exposing the lens.

The material of the cover member 300 may be a non-magnetic material such as SUS or plastic to prevent sticking to the magnet 130, but may be formed of a magnetic material to function as a yoke.

Next, the bobbin 110 will be described.

The bobbin 110 is disposed inside the housing 140 and is movable in the optical axis direction or the first direction (eg, the Z-axis direction) by electromagnetic interaction between the coil 120 and the magnet 130 .

The bobbin 110 may have an opening for mounting a lens or a lens barrel, and the shape of the opening may be a circle, an ellipse, or a polygon, but is not limited thereto.

The bobbin 110 may have a guide part on the upper surface for guiding the installation position of the upper elastic member 150 . A first coupling part for coupling with the first inner frame of the upper elastic member 150 may be provided on the upper surface of the bobbin 110 , and the second inner frame of the lower elastic member 160 on the lower surface of the bobbin 110 and A second coupling part for coupling may be provided.

Each of the first coupling part and the second coupling part of the bobbin 110 may be in the form of any one of a protrusion, a groove, a through hole, or a plane.

In addition, even if the bobbin 110 moves beyond a prescribed range due to an external impact, etc., to prevent the outer surface or the upper surface of the bobbin 110 from directly colliding with the inner surface of the housing 140 or the inner surface of the cover member 300 A stopper may be provided on at least one of an upper surface and an outer surface of the bobbin.

The outer surface of the bobbin 110 has first to fourth outer surfaces 110a-1 corresponding to the first to fourth side portions 141-1 to 141-4 of the fixing part (eg, the housing 140). to 110a-4) and fifth to sixth outer surfaces 110b-1 to 110b-4 corresponding to the first to fourth corner portions 142-1 to 142-4 of the housing 140). can do.

For example, the first to eighth outer surfaces 110a - 1 to 110a - 4 and 110b - 1 to 110b - 4 of the bobbin 110 may be surfaces of the bobbin 110 in contact with the coil 120 . Alternatively, when the protrusion is provided on the outer surface of the bobbin 110 , the first to eighth outer surfaces 110a-1 to 110a-4 and 110b-1 to 110b-4 of the bobbin 110 are the protrusions of the protrusion. It may be the standard side.

Each of the outer surfaces 110b-1 to 110b-4 of the bobbin 110 has two adjacent outer surfaces 110a-1 and 110a-2, 110a-2 and 110a-3, 110a-3 and 110a-4. , 110a-4 and 110a-1).

In addition, the bobbin 110 has a first edge 39a where any one of the two outer surfaces (eg, 110a-1 and 110a-2) and a second outer surface (eg, 110b-1) meet, and the two second It may include a second edge 39b where the other one of the first outer surfaces (eg, 110a-1 and 110a-2) and the second outer surface 110b-1 meet.

In addition, the outer surface of the bobbin 110 may be provided with a first seating groove in which the coil 120 is seated, inserted, or disposed, but is not limited thereto.

The outer surface (eg, 110a-1) of the bobbin 110 may be provided with a second seating groove for the sensing magnet 180 to be seated, inserted, fixed, or disposed, and the outer surface of the bobbin 110 (eg, 110a) , 110a-3) may be provided with a third seating groove for the balancing magnet 185 to be seated, inserted, fixed, or disposed.

Next, the coil 120 will be described.

The coil 120 is disposed on the outer surface of the bobbin 110 .

For example, it may be disposed in the first seating groove of the bobbin 110 of the coil 120 .

The coil 120 may have a closed curve, for example, a ring shape, wrapped around the outer circumferential surface of the bobbin 110 in a direction to rotate about the optical axis OA.

The coil 120 may be directly wound on the outer surface of the bobbin 110 , but is not limited thereto, and according to another embodiment, the coil 120 is disposed on the bobbin 110 using a coil ring or is angled. It may be provided as a ring-shaped coil block.

When a driving signal (eg, driving current) is supplied, the coil 120 may form an electromagnetic force through electromagnetic interaction with the magnet 130 , and the bobbin 110 may be moved in the first direction by the formed electromagnetic force. have.

The sensing magnet 180 may be disposed in the second seating groove to be disposed inside the coil 120 , and the balancing magnet 185 may be disposed in the third seating recess and disposed inside the coil 120 . Here, the inside of the coil 120 may be toward the center of the bobbin 110 with respect to the coil 120 .

Each of the sensing magnet 180 and the balancing magnet 180 disposed on the bobbin 110 may be spaced apart from the coil 120 in a direction perpendicular to the optical axis OA, but is not limited thereto. Each of the sensing magnet 180 and the balancing magnet 180 disposed on the bobbin 110 may contact the coil 120 .

The coil 120 may overlap the first and second magnets 130 in the second direction (eg, the x-axis direction, see FIG. 3 ).

Also, the coil 120 may overlap the sensing magnet 180 and the balancing magnet 180 in the third direction (eg, the y-axis direction), but is not limited thereto. In another embodiment, the coil 120 may not overlap the sensing magnet 180 and the balancing magnet 180 in the third direction (eg, the y-axis direction).

In another embodiment, the coil 120 may include two coil rings corresponding to the first and second magnets 130 - 1 and 130 - 2 , each of which includes the first and second magnets. (130-1, 130-2) may be disposed on the outer surface of the bobbin 110 facing each other. In this case, the two coil rings may be electrically connected to each other, but the present invention is not limited thereto.

Next, the housing 140 will be described.

The housing 140 accommodates the bobbin 110 on which the first coil 120 is disposed.

The housing 140 supports the first and second magnets 130 - 1 and 130 - 2 , the position sensor 170 , and the circuit board 190 . 1 to 4 , the first and second magnets 130 - 1 and 130 - 2 are disposed in the housing 140 , but the embodiment is not limited thereto. In another embodiment, the first and second magnets 130 - 1 and 130 - 2 may be disposed on the inner surface of the side plate of the cover member 300 or the base 210 .

As described above, the configuration according to the embodiment in which the first and second magnets 130-1 and 130-2 are disposed may be referred to as a "fixing part", and the fixing part may include the housing 140, the cover member 300, and the base. (210) or may be a separate component other than these.

For example, in another embodiment, instead of the housing 140, the first and second magnets may be disposed on the cover member 300 or the base 210, and in this case, the housing 140 may or may not be omitted. .

For example, in another embodiment, the magnets may be disposed on the top of the base to correspond to the sides of the base, and may be spaced apart from the base or in contact with the base.

The housing 140 may have a column shape as a whole. For example, the housing 140 may have a polygonal (eg, quadrangular or octagonal) or circular opening.

The fixing part may include first to fourth side parts spaced apart from each other, and first to fourth corner parts spaced apart from each other.

For example, the housing 140 may include first to fourth side portions 141-1 to 141-4 that are spaced apart from each other, and first to fourth corner portions 142-1 to 142-4 that are spaced apart from each other. can

The first to fourth sides of the fixing part may correspond to or face the first to fourth outer surfaces 110a-1 to 110a-4 of the bobbin 110, and the first to fourth corners of the fixing part The parts may correspond to or face the fifth to eighth outer surfaces 110b-1 to 110b-4 of the bobbin 110 .

For example, the first to fourth side portions 141-1 to 141-4 of the housing 140 may correspond to the first to fourth outer surfaces 110a-1 to 110a-4 of the bobbin 110 or may face each other, and the first to fourth corner portions 142-1 to 142-4 of the housing 140 are disposed on the fifth to eighth outer surfaces 110b-1 to 110b-4 of the bobbin 110. can either respond or face-to-face.

For example, the first to fourth corner portions 142-1 to 142-4 of the housing 140 may be an area corresponding to the area between the first corner 39a and the second corner 39b of the bobbin 110 . can

The first side and the third side of the fixing part may face each other and may extend in a second direction (eg, an x-axis direction), and the first side and the third side of the fixing part may be opposite to each other in the second direction or the transverse direction. may have the same length.

For example, the first side portion 141-1 and the third side portion 141-3 of the housing 140 may face each other and extend in the second direction (eg, the x-axis direction). For example, the first side portion 141-1 and the third side portion 141-3 of the housing 140 may have the same length in the second direction or the horizontal direction.

The second side and the fourth side of the fixing part may face each other and extend in a third direction (eg, a y-axis direction). For example, the second side and the fourth side of the fixing part may have the same length in the third direction or the transverse direction.

For example, the second side portion 141-2 and the fourth side portion 141-4 of the housing 140 may face each other and extend in a third direction (eg, the y-axis direction). For example, the second side portion 141 - 2 and the fourth side portion 141-4 of the housing 140 may have the same length in the third direction or the horizontal direction.

The length in the second direction or transverse direction of each of the first side (eg, 141-1) and the third side (eg, 141-3) of the fixing portion (eg, housing 140) is determined by the length of the fixing portion (eg, housing 140) in the second direction or transverse direction. The second side (eg, 141-2) and the fourth side (eg, 141-4) of 140) may have the same length in the third direction or in the transverse direction, but are not limited thereto.

In another embodiment, the length in the second direction of each of the first side (eg, 141-1) and the third side (eg, 141-3) of the fixing part (eg, the housing 140) is the fixing part (eg, 141-3). The second side (eg, 141-2) and the fourth side (eg, 141-4) of the housing 140) may have different lengths in the third direction. For example, the length in the third direction of each of the second side (eg, 141-2) and the fourth side (eg, 141-4) of the fixing part (eg, the housing 140) is the fixing part (eg, the housing ( 140)) of the first side (eg, 141-1) and the third side (eg, 141-3) in the second direction.

The thickness T1 of the first side (eg, 141-1) of the fixed portion (eg, housing 140) is the thickness (T1) of the third side 141-3 of the fixed portion (eg, housing 140) (eg, housing 140). It may be greater than T2) (T1>T2).

The length T1 in the first horizontal direction (eg, third direction) of the first side (eg, 141-1) of the fixing part (eg, housing 140) is equal to the length T1 of the fixing part (eg, housing 140). 140)) is different from the length T2 in the first horizontal direction (eg, the third direction) of the third side 141-3.

For example, the length T1 in the first horizontal direction (eg, the x-axis direction) of the first side portion 141-1 of the fixing portion (eg, the housing 140) is the fixing portion (eg, the housing 140) It may be greater than the length T2 of the third side portion 141-3 in the first horizontal direction (T1>T2). For example, the first horizontal direction may be a direction from the first side portion 141-1 of the fixing part (eg, the housing 140 ) toward the third side part 141-3 of the fixing part or a direction parallel to the direction of the fixing part (eg, the housing 140 ).

It places the center 502 of the bobbin 110 between the center 501 of the fixing portion (eg, housing 140) and the third side (eg, 141-3) of the fixing portion (eg, housing 140). to place it

In addition, the length T3 in the second horizontal direction (eg, second direction) of the second side part 141-2 of the fixing part (eg, the housing 140) is the second of the fixing part (eg, the housing 140). It may be the same as the length T4 of the second horizontal direction (eg, the second direction) of the fourth side portions 141-4.

For example, the length T3 in the second horizontal direction (eg, the x-axis direction) of the second side part 141 - 2 of the fixing part (eg, the housing 140 ) is the fixing part (eg, the housing 140 ). )) of the fourth side portion 141-4 in the second horizontal direction (eg, the x-axis direction) may be the same as the length T4.

For example, the second horizontal direction may be a direction parallel to the direction from the second side portion 141-2 to the third side portion 141-3 of the fixing part.

The first corner portion 142-1 of the fixing portion (eg, the housing 140) connects the first side portion 141-1 and the second side portion 141-2 of the fixing portion (eg, the housing 140). and the second corner part 142-2 connects the second side part 141-2 and the third side part 141-3 of the fixed part (eg, the housing 140), and the third corner part ( 142-3) connects the third side part 141-3 and the fourth side part 141-4 of the fixing part (eg, the housing 140), and the fourth corner part 142-4 is the fixing part ( For example, the fourth side portion 141-4 and the first side portion 141-1 of the housing 140 may be connected.

The length d1 in the first horizontal direction (eg, the y-axis direction) of each of the first corner portion 142-1 and the fourth corner portion 142-4 is the second corner portion 142-2, and a length d2 in the first horizontal direction (eg, the y-axis direction) of each of the third corner portions 142 - 3 ( d1 > d2 ).

Also, for example, the length d3 in the second horizontal direction (eg, the x-axis direction) of each of the first corner part 142-1 and the fourth corner part 142-4 is the second corner part ( 142-2) and the third corner portion 142-3 may be the same as the length d4 in the second horizontal direction (eg, the x-axis direction) (d3=d4).

The position sensor 170 may be disposed on the first side portion 141-1 of the fixing part (eg, the housing 140 ). For example, the first side portion 141-1 of the fixing part (eg, the housing 140) may be provided with a first groove for the position sensor 170 to be seated, inserted, or disposed.

In addition, the first and second magnets 130-1 and 130-2 may be disposed on the second side portion 141-2 and the fourth side portion 141-4 of the fixing part (eg, the housing 140). have. For example, a second groove for arranging the first magnet 130-1 may be provided in the second side portion 141-2 of the fixing part (eg, the housing 140), and the fixing part (eg, the housing ( 140)), a third groove for arranging the second magnet 130-2 may be provided in the fourth side portion 141-4.

For example, the first groove, the second groove, and the third groove of the fixing part (eg, the housing 140 ) may be in the form of a concave groove or a through hole, but is not limited thereto. In another embodiment, at least one of the first to third grooves may not be provided in the fixing part.

The first and second magnets 130-1 and 130-2, and the position sensor 170 are formed in the first to third grooves of the fixing part (eg, the housing 140) by an adhesive member such as an adhesive or double-sided tape. may be fixed.

Each of the first to fourth side portions 141-1 to 141-4 of the housing 140 may be disposed parallel to a corresponding one of the side plates of the cover member 300 .

A first coupling portion for coupling with the first outer frame 152 of the upper elastic member 150 may be provided on an upper portion or an upper surface of the housing 140 , and a lower elastic member 160 on a lower or lower surface of the housing 140 . ) may be provided with a second coupling portion for coupling with the second outer frame (162). Each of the first coupling part and the second coupling part of the housing 140 may have a protrusion, a groove, a through hole, or a planar shape, but is not limited thereto.

In order to prevent a direct collision with the inner surface of the upper plate of the cover member 300 , the housing 140 may include an upper portion or a first stopper protruding from the upper surface. In order to prevent collision with the upper or upper surface of the base 210 , the housing 140 may further include a second stopper protruding from the lower or lower surface.

A third stopper protruding from the outer surfaces of the first to fourth side portions 141-1 to 141-4 of the housing 140 may be provided, and the third stopper may include a third stopper at which the housing 140 is connected to the second and/or second and/or When moving in the third direction, it is possible to prevent collision with the inner surface of the side plate of the cover member 300 .

FIG. 3B shows the relationship between the center 501 of the fixing part (eg, the housing 140 ) and the center of the bobbin 110 , and FIG. 10 is an AB of the lens driving device 100 shown in FIGS. 1 and 3B . direction is shown.

Referring to FIGS. 3A, 3B and 10 , the center 501 of the fixing part (eg, the housing 140 ) may be the spatial center of the fixing part in a two-dimensional plane perpendicular to the optical axis. Also, the center 502 of the bobbin 110 may be a spatial center of the bobbin 110 in a two-dimensional plane perpendicular to the optical axis.

For example, the center 501 of the fixing part (eg, the housing 140 ) may be the center or the spatial center of the housing 140 in the optical axis direction, and the side portion 141-1 of the housing 140 in the direction perpendicular to the optical axis. to 141-4) and may overlap. Also, for example, the center 502 of the bobbin 110 may be a center or a spatial center of the bobbin 110 in an optical axis direction, and may overlap an outer surface of the bobbin 110 in a direction perpendicular to the optical axis.

The center 502 of the bobbin 110 may be located between the center 501 of the fixed portion (eg, the housing 140) and the third side portion 141-3 of the fixed portion (eg, the housing 140). have.

Alternatively, the center 502 of the bobbin 110 may be located between the center 501 of the fixing part (eg, the housing 140 ) and the third outer surface 110b - 3 of the bobbin 110 .

The separation distance D1 between the center 501 of the fixing part (eg, the housing 140 ) and the center 502 of the bobbin 110 may be 25 μm to 150 μm. For example, D1 may be 50 μm to 100 μm.

When D1 is less than 25 μm, a sufficient space for arranging the position sensor 170 may not be secured, and a sufficient margin of design of an optical device including the lens driving device according to the embodiment may not be secured. When D1 exceeds 150 μm, the length of the lens driving apparatus 100 in the third direction may increase to increase the size.

For example, the center 501 of the fixing part (eg, the housing 140) is the first horizontal center line 201a of the fixing part (eg, the housing 140) and the first vertical center line 201b of the housing 140. It could be a meeting point.

For example, the first horizontal centerline 201a is parallel to a direction from the second side to the fourth side of the fixing portion (eg, the housing 140 ) or a second horizontal direction (eg, the x-axis), and the fixing portion (eg, the housing 140 ). , may be an imaginary straight line passing through the center 501 of the housing 140 .

Alternatively, for example, the first horizontal center line 201a may be a virtual straight line that is perpendicular to one surface of the first magnet 130 - 1 and passes through the center 501 of the fixing part (eg, the housing 140 ). Here, one surface of the first magnet 130 - 1 may be a surface facing the outer surface 110a - 2 of the bobbin 110 .

The first vertical center line 201b is parallel to the second side part 141-2 or the first horizontal direction (eg, y-axis) of the fixing part, and is parallel to the center 501 of the fixing part (eg, the housing 140). It may be an imaginary straight line passing through.

For example, the center 502 of the bobbin 110 may be a point where the second horizontal center line 202a of the bobbin 110 and the second vertical center line 202b of the bobbin 110 meet.

For example, the second horizontal centerline 202a is parallel to the direction from the second side to the fourth side of the fixing portion (eg, the housing 140 ) or a second horizontal direction (eg, the x-axis), and the bobbin 110 . It may be an imaginary straight line passing through the center 502 of .

Alternatively, for example, the first horizontal center line 201a may be a virtual straight line perpendicular to one surface of the first magnet 130 - 1 and passing through the center 502 of the bobbin 110 .

The second vertical center line 202b may be an imaginary straight line that is parallel to the second side portion 141-2 or the first horizontal direction (eg, y-axis) of the fixed part and passes through the center 502 of the bobbin 110 . have. For example, the second vertical centerline 202b may be aligned with the first vertical centerline 201b.

The second horizontal centerline 202a of the bobbin 110 is the first horizontal centerline 201a of the fixed portion (eg, the housing 140) and the third side 141-3 of the fixed portion (eg, the housing 140). ) can be located between Alternatively, the second horizontal centerline 202a of the bobbin 110 is located between the first horizontal centerline 201a of the fixing part (eg, the housing 140 ) and the third outer surface 110b-3 of the bobbin 110 . can do.

In a direction from the first side portion 141-1 of the housing 140 to the third side portion 141-3 of the fixing portion (eg, the outer surface of the first side portion 141-1 and the fixing portion ( For example, the distance L1 between the centers 501 of the housing 140 is the distance L2 between the outer surface of the third side part 141-3 and the center 501 of the fixing part (eg, the housing 140). may be the same as (L1 = L2).

In addition, in a direction from the second side part 141-2 of the fixing part (eg, the housing 140) to the fourth side part 141-4 of the fixing part (eg, the housing 140), the fixing part (eg, the housing 140) The distance L3 between the outer surface of the second side part 141-2 of the housing 140 and the center 501 of the fixing part (eg, the housing 140) is the distance L3 of the fixing part (eg, the housing 140). It may be equal to the distance L4 between the outer surface of the fourth side portion 141-4 and the center 501 of the fixing portion (eg, the housing 140) (L2=L4).

For example, when protrusions or protrusions are provided on the outer surfaces of the first to fourth sides (eg, 141-1 to 141-4) of the fixing part (eg, the housing 140), the fixing part (eg, the housing 140) An outer surface of each of the first to fourth side portions (eg, 141-1 to 141-4) of 140 may be a protrusion or a surface serving as a protrusion reference of the protrusion.

In addition, the distance R1 between the first outer surface 110b-1 of the bobbin 110 and the center 502 of the bobbin 110 is the third outer surface 110b-3 of the bobbin 110 and the bobbin 110 It may be equal to the distance R2 between the centers 502 of (R1=R2).

In addition, the distance R3 between the second outer surface 110b - 2 of the bobbin 110 and the center 502 of the bobbin 110 is the fourth outer surface 110b - 4 of the bobbin 110 and the bobbin 110 . It may be equal to the distance R4 between the centers 502 of (R3=R4).

Each of the first and second magnets 130 - 1 to 130 - 2 may be asymmetrical to the first horizontal center line 201a of the fixing part (eg, the housing 140 ), and the second of the bobbin 110 . The horizontal center line 202a may be symmetrical left and right.

4 shows the distance relationship between the center 501 of the fixing part, the center of the bobbin 110, the first side part 141-1 of the fixing part, and the first outer surface 110a-1 of the bobbin 110. indicates.

Referring to FIG. 4 , in a direction from the first side 141-1 of the fixing part (eg, the housing 140) toward the third side 141-3 of the fixing part (eg, the housing 140), The distance D2 between the outer surface of the first side portion 141-1 and the center 502 (or the second horizontal center line 202a) of the bobbin 110 is equal to the outer surface of the first side portion 141-1 and high It may be greater than the distance L1 between the centers 501 (or the first horizontal center lines 201a) of the top portions (eg, the housing 140 ) (D2>L1).

In addition, the distance R1 between the first outer surface 110a-1 of the bobbin 110 and the center 502 (or the second horizontal centerline 202a) of the bobbin 110 is the first outer surface ( 110a-1) and the center 501 (or the first horizontal center line 201a) of the fixing part (eg, the housing 140) may be greater than the distance D3 (R1>D3).

Also, in a direction from the fixing portion (eg, the first side portion 141-1 of the housing 140-1) toward the fixing portion (eg, the third side portion 141-3 of the housing 140-1), the first side The distance D2 between the outer surface of 141-1 and the center 502 (or the second horizontal centerline 202a) of the bobbin 110 is the outer surface of the third side portion 141-3 and the bobbin 110 The distance D4 between the centers 502 (or second horizontal centerlines 202a) of may be greater than (D4<D2).

That is, the center 502 or optical axis of the bobbin 110 is closer to the outer surface of the third side portion 141-3 of the housing 140 than the outer surface of the first side portion 141-1 of the housing 140 . can be located

The descriptions in FIGS. 3A to 4 may be applied to other embodiments in which the fixing part is a cover member or a base.

Next, the first and second magnets 130-1 and 130-2 will be described.

The first magnet 130-1 is disposed on the second side part 141-2 of the fixing part (eg, the housing 140), and the second magnet 130-2 is the fixing part (eg, the housing 140). ) on the fourth side 141-4.

In the initial position of the bobbin 110 , each of the first and second magnets 130 - 1 and 130 - 2 disposed on the fixing part (eg, the housing 140 ) has a second direction (eg, the x-axis direction). Alternatively, it may overlap the first coil 120 in a direction from the first magnet 130-1 to the second magnet 130-2.

Here, the initial position of the bobbin 110 is the initial position of the AF movable part in a state in which power is not applied to the first coil 120 , and the upper elastic member 150 and the lower elastic member 160 are only the weight of the AF movable part. It may be a position where the AF movable part is placed as it is elastically deformed only by .

In addition to this, the initial position of the bobbin 110 is a position where the AF movable part is placed when gravity acts in the direction from the bobbin 110 to the base 210 or, conversely, when gravity acts in the direction from the base 210 to the bobbin 110 . can be The AF movable unit may include the bobbin 110 and components mounted on the bobbin 110 , for example, a coil 120 , a sensing magnet 180 , and a balancing magnet 185 .

In another embodiment, second and third grooves may not be provided in the second and fourth side portions 141-2 and 142-4 of the fixing part (eg, the housing 140), and the first and second grooves may not be provided. The magnets 130-1 and 130-2 may be disposed on either the outside or the inside of the second and fourth sides 141-2 and 141-4 of the fixing part (eg, the housing 140). have.

The shape of each of the first and second magnets 130-1 and 130-2 corresponds to the second and fourth side parts 141-2 and 141-4 of the fixing part (eg, the housing 140). It may have a shape, for example, a rectangular parallelepiped shape, but is not limited thereto.

Each of the first and second magnets 130-1 and 130-2 has a first surface facing the coil 120 is an S pole, and a second surface opposite to the first surface is a single-pole magnetized magnet having an N pole, respectively. However, the present invention is not limited thereto. In another embodiment, the first and second surfaces of each of the first and second magnets 130-1 and 130-2 may be opposite to each other. Alternatively, in another embodiment, each of the first and second magnets 130 - 1 and 130 - 2 may be a positively polarized magnet.

The separation distance K1 between the first end of the first magnet 130-1 and the outer surface of the first side 141-1 of the fixing part (eg, the housing 140) is the first magnet 130-1) It may be the same as the separation distance K2 between the second end of the and the outer surface of the third side portion 141-3 of the fixing part (eg, the housing 140).

In addition, the separation distance between the first end of the second magnet 130-2 and the outer surface of the first side 141-1 of the fixing part (eg, the housing 140) is the second of the second magnet 130-2. It may be the same as the separation distance between the end and the outer surface of the third side portion 141-3 of the fixing portion (eg, the housing 140).

Next, the sensing magnet 180 and the balancing magnet 185 will be described.

The sensing magnet 180 may be disposed in the second seating groove of the bobbin 110 , and the balancing magnet 185 may be disposed in the third seating groove of the bobbin 110 .

In each of the sensing magnet 180 and the balancing magnet 185 , the boundary surface of the N pole and the S pole may be parallel to a direction perpendicular to the optical axis direction, but is not limited thereto. For example, in another embodiment, the interface between the N pole and the S pole may be parallel to the optical axis direction.

Due to the interaction between the coil 120 and the first and second magnets 130-1 and 130-2, the sensing magnet 180 may move together with the bobbin 110 in the optical axis direction OA, and the position sensor Reference numeral 170 may sense the strength of the magnetic field of the sensing magnet 180 moving in the optical axis direction, and may output an output signal according to the sensed result.

For example, the controller 830 of the camera module or the controller 780 of the terminal may detect the displacement of the bobbin 110 in the optical axis direction based on an output signal output by the position sensor 170 .

In addition, the balancing magnet 185 may be disposed on the bobbin 110 in order to balance the weight with the sensing magnet 180 , whereby an accurate AF operation may be performed. In another embodiment, the balancing magnet 185 may be omitted.

Next, the position sensor 170 and the circuit board 190 will be described.

The position sensor 170 and the circuit board 190 are disposed on the first side (eg, 141-1) of the fixing part (eg, the housing 140) to correspond to the sensing magnet 180 .

For example, in the initial position of the bobbin 110 , the position sensor 170 may overlap the sensing magnet 180 in a direction perpendicular to the optical axis direction or in a third direction (eg, y-axis direction), but is not limited thereto. , in another embodiment, the two may not overlap.

For example, the circuit board 190 may be disposed on the outer surface of the first side portion 141-1 of the housing 140 . Alternatively, in another embodiment, the circuit board may be disposed on the inner surface of the cover member 300 or the inner surface of the first side of the base 210, but is not limited thereto.

For example, the first side (eg, 141-1) of the fixing part (eg, the housing 140) may include a groove for seating, inserting, or disposing the circuit board 190 therein.

For example, a groove for seating or disposing the circuit board 190 may be provided on an outer surface of the first side portion 141-1 of the housing 140 .

The position sensor 170 may be mounted on the circuit board 190 disposed in the fixing part (eg, the housing 140 ), and may be disposed in the first groove of the fixing part (eg, the housing 140 ).

The position sensor 170 may detect a change in the strength of the magnetic field of the sensing magnet 180 mounted on the bobbin 110 according to the movement of the bobbin 110 , and an output signal (eg, an output voltage) according to the sensed result ) can be printed.

The position sensor 170 may be disposed on the first surface of the circuit board 190 . Here, the first surface of the circuit board 190 may be a surface facing the first outer surface 110b - 1 of the bobbin 110 or the outer surface of the first side of the housing 140 .

FIG. 7 shows an embodiment of the position sensor shown in FIG. 2 .

Referring to FIG. 7 , the position sensor 170 may be an integrated circuit (IC) including a Hall sensor 61 and a driver 62 .

For example, the Hall sensor 61 may be made of silicon, and as the ambient temperature increases, the output VH of the Hall sensor 61 may increase.

Alternatively, in another embodiment, the Hall sensor 61 may be made of GaAs, and the output VH of the Hall sensor 61 may have a slope of about -0.06%/°C with respect to the ambient temperature.

The position sensor 170 may further include a temperature sensing element 63 capable of sensing an ambient temperature. The temperature sensing element 63 may output a temperature sensing signal Ts according to a result of measuring the temperature around the position sensor 170 to the driver 62 .

For example, the Hall sensor 61 of the position sensor 170 may generate an output VH according to a result of sensing the strength of the magnetic force of the sensing magnet 180 .

The driver 62 may output a driving signal dV for driving the Hall sensor 61 and a driving signal Id1 for driving the coil 120 .

For example, using data communication using a protocol, for example, I2C communication, the driver 62 receives a clock signal SCL and a data signal SDA from the control unit 830 of the camera module or the control unit 780 of the optical device. ), power signals (VCC, GND) can be received.

The driver 62 includes a driving signal dV for driving the Hall sensor 61 using the clock signal SCL and the power signals VCC and GND, and a driving signal Id1 for driving the coil 120 . ) can be created.

In addition, the driver 62 receives the output (VH) of the Hall sensor 61, using a data communication using a protocol, for example, I2C communication, related to the output (VH) of the Hall sensor 61 The clock signal SCL and the data signal SDA may be transmitted to the controller 830 or 780 .

In addition, the driver 62 receives the temperature sensing signal Ts measured by the temperature sensing element 63, and controls the temperature sensing signal Ts using data communication using a protocol, for example, I2C communication. (830, or 780).

The controller 830 or 780 may perform temperature compensation on the output VH of the Hall sensor 61 based on a change in ambient temperature measured by the temperature sensing element 63 of the position sensor 170 .

The position sensor 170 includes first to third terminals for receiving a clock signal SCL and two power signals VCC and GND, and a fourth terminal for transmitting and receiving data SDA, and a coil ( 120) may include fifth and sixth terminals for providing a driving signal.

The first to fourth terminals of the position sensor 170 may be electrically connected to the terminals 251-1 to 251-4 of the circuit board 190 for electrical connection with the outside, and The fifth and sixth terminals may be electrically connected to the coil 120 through the first and second lower elastic members 160 - 1 and 160 - 2 .

In another embodiment, the position sensor 170 may be implemented as a single position detection sensor such as a Hall sensor. In this case, the driving signal of the coil 120 is not provided from the position sensor 170 , but may be provided to the circuit board 190 from the outside, and the first and second lower elastic members 160 - 1 and 160 - 2) may be transmitted to the coil 120 .

Recently, the number of designs that require adding a driver IC with functions such as temperature compensation to the inside of the actuator is increasing. Due to the increase in the size and thickness of the driver IC including the Hall sensor and the position sensor with the temperature sensing function added compared to the single Hall sensor, magnets can be added to only three sides of the housing.

However, when the magnets are mounted on three surfaces of the housing, the balance of electromagnetic force is broken and the tilt may be sharply increased during AF driving, so that two magnets may be provided in the embodiment.

The embodiment can secure more space for mounting the magnet in the housing along the X axis, and the center of the product (eg, the lens driving device) (eg, the center of the housing) and the lens in the Y axis to minimize the length. By designing the optical axis (eg, the center of the bobbin) differently, the size of the product (eg, a lens driving device, a camera module, and an optical device) can be reduced.

The position sensor 170 as shown in FIG. 7 may be in the form of a driver IC with a temperature compensation function added, and has a larger size than a position sensor made of a hall sensor alone. In order to arrange the position sensor 170 of such a large size in the fixed portion, sufficient space must be secured in the fixed portion.

In the trend of miniaturization of camera modules and optical devices, it is difficult to secure a space for the position sensor 170 of such a large size, and in order to secure this space, the size of the lens must be reduced, which may be a limitation of the focal length of the lens. .

In the embodiment, as described with reference to FIGS. 3A to 4 , two magnets are disposed on the second and fourth sides of the fixing part, and the optical axis (or the center 502 of the bobbin 110) is the fixing part (eg, the housing). By positioning it between the center 501 of 140) and the third side (eg, 141-3) of the fixing portion (eg, housing), the fixing portion (eg, housing 140) does not increase the overall size at the same time. ) on the first side (eg, 141-1), it is possible to secure a sufficient space to place the position sensor 170.

8 is a cross-sectional view of an optical device 200A including the lens driving device 100 according to the embodiment of FIG. 4 .

Referring to FIG. 8 , the camera module including the lens driving device 100 may be mounted on the front surface 403 of the optical device 200A. In this case, in order to improve the degree of freedom in the design of the front surface of the optical device, the lens driving device 100 may be positioned at the upper end of the optical device 200A or adjacent to the upper surface 405 .

For example, the lens driving device may be disposed in the optical device such that the third side portion 141-3 of the fixing portion of FIG. 4 is adjacent to the top or upper surface 405 of the optical device 200A.

Since the lens 412 mounted on the lens driving device 100 needs to receive light, it should be opened from the front side 403 of the optical device. As described in FIG. 4 , since D4 < D2, when the camera module including the lens driving device 100 according to the embodiment is applied to the optical device 200A, the lens 412 is located at the upper end of the optical device 200A or It may be disposed adjacent to the upper surface 405 , thereby improving the degree of freedom of design for the front surface of the optical device 200A.

Next, the upper elastic member 150 and the lower elastic member 160 will be described.

FIG. 6A shows the upper elastic member 150 shown in FIG. 2 , and FIG. 6B shows the lower elastic member shown in FIG. 2 . 6A and 6B are views taken in the same direction as FIG. 3 or plan views in the same direction.

6A and 6B , the upper elastic member 150 may be coupled to the upper part, the upper surface, or the upper part of the bobbin 110 and the upper part, the upper surface, or the upper part of the fixing part (eg, the housing 140 ). In addition, the lower elastic member 160 may be coupled to a lower portion, a lower surface, or a lower end of the bobbin 110 and a lower portion, a lower surface, or a lower end of the fixing part (eg, the housing 140 ). The upper elastic member 150 and the lower elastic member 160 may elastically support the bobbin 110 .

The upper elastic member 150 and the lower elastic member 160 may be implemented as a leaf spring, but is not limited thereto, and may be implemented as a coil spring, a suspension wire, or the like.

The upper elastic member 150 is coupled to the upper part, the upper surface, or the upper end of the first inner frame 151 coupled to the upper part, the upper surface, or the upper end of the bobbin 110 , and the fixing part (eg, the housing 140 ). It may include a first outer frame 152 to be formed, and a first frame connecting portion connecting the first inner frame 151 and the first outer frame 152 .

For example, the first inner frame 151 may be coupled to the first coupling portion of the bobbin 110 , and the first outer frame 152 may be coupled to the first coupling portion of the housing 140 .

The first outer frame 152 has a first upper outer portion 152-1, a second corner that corresponds to or is coupled to the upper portion of the first corner portion (eg, 142-1) of the fixing portion (eg, the housing 140). The second upper outer portion 152-2 corresponding to or coupled to the upper portion of the portion (eg, 142-2), the third upper outer portion 152- corresponding to or coupled to the upper portion of the third corner portion (eg 142-3) 3), and a fourth upper outer portion 152 - 4 corresponding to or coupled to the upper portion of the fourth corner portion 142 - 4 .

The first frame connection portion includes a first upper connection portion 153a connecting the first upper outer portion 152-1 and the first inner frame 151 , and a second upper outer portion 152 - 2 and the first inner frame 151 . a second upper connecting portion 153b connecting the , a third upper connecting portion 153c connecting the third upper outer portion 152-3 and the first inner frame 151, and a fourth upper outer portion 152-4 and A fourth upper connection part 153d for connecting the first inner frame 151 may be included.

4, since D2>D4, the first portion 15a of the first outer frame 151 of the upper elastic member 150 corresponding to the first side portion 141-1 of the fixing portion (eg, the housing 140) ) and the distance D5 between the center 502 of the bobbin 110 is the first outer frame of the upper elastic member 150 corresponding to the third side 141-3 of the fixing part (eg, the housing 140) It may be greater than the distance D6 between the second part 15b of 151 and the center 502 of the bobbin 110 (D5>D6).

In order to balance the modulus of elasticity of the upper elastic member 150 , the width W1 of each of the first upper connection part 153a and the fourth upper connection part 153d is the second upper connection part 153b and the third upper connection part 153c. ) may be larger than each width W2 (W1>W2).

The lower elastic member 160 may include a first spring 160-1 and a second spring 160-2 that are spaced apart from each other to be electrically separated.

For example, the first and springs 160 - 1 and 160 - 2 are the first side portion 141-1 and the third side portion 141 of the fixing portion (eg, the housing 140 ) on which the circuit board 190 is disposed. -3) can be separated from each other.

Each of the first and second springs 160 - 1 and 160 - 2 includes a second inner frame 161 coupled to an upper portion, an upper surface, or an upper end of the bobbin 110 , and a fixing portion (eg, the housing 140 ). ) may include a second outer frame 162 coupled to the upper portion, the upper surface, or the upper end, and a second frame connecting portion connecting the second inner frame 161 and the second outer frame 152 .

For example, the second inner frame 151 may be coupled to the second coupling portion of the bobbin 110 , and the second outer frame 152 may be coupled to the second coupling portion of the housing 140 .

For example, the second outer frame 162 of the first spring 160-1 corresponds to or coupled to the lower portion of the first corner portion (eg, 142-1) of the fixing portion (eg, the housing 140). It may include a lower outer portion 162-1, and a second lower outer portion 162-2 corresponding to or coupled to a lower portion of the second corner portion (eg, 142-2).

The second outer frame 162 of the second spring 160-2 corresponds to or coupled to the lower portion of the fixing portion (eg, the third corner portion (eg, 142-3) of the housing 140). 162-3) and a fourth lower outer portion 162-4 corresponding to or coupled to the lower portion of the fourth corner portion 142-4.

The second frame connection portion of the first spring 160-1 includes a first lower connection portion 163a connecting the first lower outer portion 162-1 and the second inner frame 161, and a second lower outer portion 162- 2) and the second upper connection part 163b connecting the second inner frame 161 may be included.

The second frame connection portion of the second spring 160 - 2 includes a third lower connection portion 163c connecting the third lower outer portion 162 - 3 and the second inner frame 161 , and a fourth lower outer portion 162 - 4) and a fourth lower connecting portion 163d connecting the second inner frame 161 may be included.

Since D2>D4 in FIG. 4 , the second outer side of the first and second springs 160-1 and 160-2 corresponding to the first side portion 141-1 of the fixing part (eg, the housing 140) The distance D7 between the first portion 16a of the frame 161 and the center 502 of the bobbin 110 is a second portion corresponding to the third side portion 141-3 of the fixing portion (eg, the housing 140). The distance D8 between the second portion 16b of the second outer frame 161 of the first and second springs 160-1 and 160-2 and the center 502 of the bobbin 110 may be greater than the distance D8 (D7> D8).

In order to balance the modulus of elasticity of the lower elastic member 160 , the width W3 of each of the first lower connection part 163a and the fourth lower connection part 163d is the second lower connection part 163b and the third lower connection part 163c. ) may be larger than each width W4 (W3>W4).

Each of the first to fourth upper connection parts 153a to 153d and the fourth to fourth lower connection parts 163a to 163d may be bent or curved (or curved) at least once to form a pattern of a certain shape. have.

The bobbin 110 moves up and/or lowers in the first direction through position change and micro-deformation of the first to fourth upper connecting parts 153a to 153d and the first to fourth lower connecting parts 163a to 163d. This can be elastically (or elastically) supported.

Bonding portions 19a and 19b to which the coil 120 is coupled may be provided on the second inner frame 161 of each of the first and second springs 160-1 and 160-2.

In addition, extension portions 161a and 164b coupled to the circuit board 190 are provided on the first portion 16a of the second outer frame 161 of each of the first and second springs 160-1 and 160-2. can be provided. Each of the extension parts 161a and 164b may protrude or extend from the outer surface of the first portion 16a of the second outer frame 161 toward the circuit board 190 .

The base 210 may form an accommodation space for the bobbin 110 and the housing 140 together with the cover member 300 , and may have a shape that matches or corresponds to the cover member 300 , for example, a rectangular shape.

The base 210 may be disposed under the housing, and the lower elastic member 160 may be disposed on the upper surface of the base 210 .

The base 210 may have an opening of the bobbin 110 and/or an opening corresponding to the opening of the housing 140 . The base 210 may include a pillar-shaped guide part protruding a predetermined height upward from each of the four corner parts.

Guide grooves into which the guide part can be inserted may be provided in the first to fourth corner parts of the housing 140, and the guide part and the housing ( The guide groove of 140) may be fastened or coupled.

FIG. 5A shows a first magnet 130-1a and a second magnet 130-2a according to another embodiment, and FIG. 5B shows the first magnet 130-1a and the second magnet 130 shown in FIG. 5A. An enlarged view of -2a) is shown.

5A and 5B , each of the first and second magnets 130-1a and 130-2a may be symmetrical with respect to the first horizontal center line 201a of the fixing part (eg, the housing 140). and may be left and right asymmetric to the second horizontal center line 202a of the bobbin 110 .

Also, for example, between the first corner portion 142-1 of the fixing portion (eg, the housing 140) and the first end 25a of the first magnet 130-1a adjacent to the first horizontal center line 201a. The distance L11 is a distance between the second end 25b of the first magnet 130-1a adjacent to the second corner part 142-2 of the fixing part (eg, the housing 140) and the first horizontal center line 201a. ) may be equal to the distance L12 between them.

Also, for example, between the fourth corner part 142-4 of the fixing part (eg, the housing 140) and the first end 26a of the second magnet 130-2a adjacent to the first horizontal center line 201a. The distance L11 is a distance between the third corner part 142-3 of the fixing part (eg, the housing 140) and the second end 26b of the second magnet 130-2a adjacent to the first horizontal center line 201a. ) may be equal to the distance L12 between them.

For example, the distance L21 between the first end 25a of the first magnet 130-1a and the second horizontal centerline 202a is the second end 25b of the first magnet 130-1a and the second horizontal greater than the distance L22 between the centerlines 202a (L21>L22).

For example, the distance L21 between the first end 26a of the second magnet 130-2a and the second horizontal center line 202a is the second end 26b of the second magnet 130-2a and the second horizontal greater than the distance L22 between the centerlines 202a (L21>L22).

As shown in FIG. 5A , the distance D12 between the second end 25b of the first magnet 130-1a and the outer surface of the third side 141-3 of the fixing part (eg, the housing 140). ) is greater than the distance D11 between the first end 25a of the first magnet 130-1a and the outer surface of the first side 141-1 of the fixing part (eg, the housing 140) (D12> D11).

In addition, the distance D12 between the second end 26b of the second magnet 130-2a and the outer surface of the third side 141-3 of the fixing part (eg, the housing 140) is the second magnet 130 -2a) is greater than the distance D11 between the first end 26a of the fixed portion (eg, the housing 140 ) and the outer surface of the first side portion 141-1 of the housing 140 (D12>D11).

Since D12>D11, the distance between the magnets 130-1a and 130-2a of the first lens driving device included in the dual camera according to the embodiment and the magnets 130-1a, 130-2a of the second lens driving device according to the embodiment The distance can be increased, thereby reducing magnetic field interference between magnets included in the first and second lens driving devices, and preventing malfunction of AF driving due to magnetic field interference.

When the first and second magnets 130-1a and 13-2a are asymmetrical to the second horizontal centerline 202a of the bobbin 110, when the second horizontal centerline 202a is a reference, the electromagnetic force An imbalance may occur, which may cause a malfunction of the AF driving unit or an undesirable tilt of the AF moving unit. By providing a chamfer-shaped groove in the (25a, 25b), it is possible to alleviate this imbalance of electromagnetic force.

For example, chamfered grooves 31a and 31b may be formed in one corner positioned at the first ends 25a and 26a of each of the first and second magnets 130-1a and 130-2a.

For example, the grooves 31a and 31b are located at any one corner adjacent to the coil 120 among the corners of the first ends 25a and 26a of the first and second magnets 130-1a and 130-2a, respectively. can be formed.

The reason for providing the chamfered grooves (31a, 31b) is to minimize the decrease in electromagnetic force between the first and second magnets (130-1a, 130-2a) and the coil 120 and to alleviate the imbalance of electromagnetic force. to do

At the initial position of the bobbin 110 , the upper part of the bobbin 110 may protrude more than the upper end (or uppermost end) of the housing 140 , and in this case, the descriptions of FIGS. 3A to 5B may be equally applied.

9 shows an embodiment of a dual camera module according to an embodiment.

Referring to FIG. 9 , the dual camera module may include a first lens driving device 100 - 1 and a second lens driving device 100 - 2 .

The first lens driving device 100-1 and the second lens driving device 100-2 shown in FIG. 9 may be the lens driving device according to the above-described embodiment shown in FIGS. 1 to 5B, but are limited thereto. it is not going to be

For example, when the first and second lens driving devices 100-1 and 100-2 are the embodiment of FIG. 5A , the magnet of the first lens driving device 100-1 and the second lens driving device 100-2 ), since the separation distance between the magnets can be further increased, the effect of preventing magnetic field interference can be improved.

In another embodiment, at least one of the first lens driving device 100 and the second lens driving device 100 may be the lens driving device according to the embodiment described with reference to FIGS. 1 to 5B . For example, one of the first and second lens driving devices may be a lens driving device according to an embodiment, and the other may be a lens driving device for OIS.

When the separation distance d3 between the first lens driving device 100-1 and the second lens driving device 100-2 is reduced, the magnets 130-1 and 130- of the first lens driving device 100-1 are 2) and the magnetic field interference between the magnets 130 - 1 and 130 - 2 of the second lens driving device 100 - 2 may increase, and a malfunction of AF driving may occur due to the magnetic field interference.

The optical axis of each of the first and second lens driving devices 100-1 and 100-2 or the center 502 of the bobbin 110 is the center 501 of the housing 140 and the third side ( 141-3), the embodiment can reduce the distance between the optical axis of the first lens driving device 100-1 and the optical axis of the second lens driving device 100-2, so that the size of the dual camera module can be reduced, and the dual zoom function of the dual camera module can be improved.

In addition, since there is no reduction in the separation distance d3 between the first lens driving device 100-1 and the second lens driving device 100-2, the embodiment improves the dual zoom function of the dual camera module At the same time, the influence of magnetic field interference between the magnet of the first lens driving device 100 - 1 and the magnet of the second lens driving device 100 - 2 may be alleviated.

Meanwhile, the lens driving apparatus according to the above-described embodiment may be used in various fields, for example, a camera module or an optical device.

For example, the lens driving device 100 according to the embodiment forms an image of an object in space using reflection, refraction, absorption, interference, diffraction, etc., which are characteristics of light, and aims to increase the visual power of the eye, It may be included in an optical instrument for the purpose of recording and reproducing an image by a lens, or for optical measurement, propagation or transmission of an image, and the like. For example, the optical device according to the embodiment may include a smartphone and a portable terminal equipped with a camera.

11 is an exploded perspective view of the camera module 200 according to the embodiment.

Referring to FIG. 11 , the camera module 200 includes a lens or a lens barrel 400 , a lens driving device 100 , an adhesive member 612 , a filter 610 , a first holder 600 , and a second holder 800 . ), an image sensor 810 , a motion sensor 820 , a controller 830 , and a connector 840 .

The lens or lens barrel 400 may be mounted on the bobbin 110 of the lens driving device 100 .

The first holder 600 may be disposed under the base 210 of the lens driving device 100 . The filter 610 is mounted on the first holder 600 , and the first holder 600 may include a protrusion 500 on which the filter 610 is mounted.

The adhesive member 612 may couple or attach the base 210 of the lens driving device 100 to the first holder 600 . The adhesive member 612 may serve to prevent foreign substances from being introduced into the lens driving device 100 in addition to the above-described bonding role.

For example, the adhesive member 612 may be an epoxy, a thermosetting adhesive, or an ultraviolet curable adhesive.

The filter 610 may serve to block light of a specific frequency band in light passing through the lens barrel 400 from being incident on the image sensor 810 . The filter 610 may be an infrared cut filter, but is not limited thereto. In this case, the filter 610 may be disposed to be parallel to the x-y plane.

A hollow may be formed in a portion of the first holder 600 on which the filter 610 is mounted so that light passing through the filter 610 may be incident on the image sensor 810 .

The second holder 800 may be disposed under the first holder 600 , and the image sensor 810 may be mounted on the second holder 600 . The image sensor 810 is a region on which the light passing through the filter 610 is incident to form an image included in the light.

The second holder 800 may include various circuits, elements, controllers, etc. to convert an image formed on the image sensor 810 into an electrical signal and transmit it to an external device.

The second holder 800 may be implemented as a circuit board on which an image sensor may be mounted, a circuit pattern may be formed, and various elements may be coupled thereto.

The image sensor 810 may receive an image included in light incident through the lens driving device 100 and convert the received image into an electrical signal.

The filter 610 and the image sensor 810 may be spaced apart to face each other in the first direction.

The motion sensor 820 may be mounted on the second holder 800 , and may be electrically connected to the controller 830 through a circuit pattern provided on the second holder 800 .

The motion sensor 820 outputs rotational angular velocity information due to the movement of the camera module 200 . The motion sensor 820 may be implemented as a 2-axis or 3-axis gyro sensor or an angular velocity sensor.

The control unit 830 is mounted on the second holder 800 . The second holder 800 may be electrically connected to the lens driving device 100 . For example, the second holder 800 may be electrically connected to the coil 120 of the lens driving device 100 and the position sensor 170 . For example, the second holder 800 may be electrically connected to the circuit board 190 of the lens driving device 100 .

For example, the controller 830 mounted on the second holder 800 may be electrically connected to the coil 120 and the position sensor 170 through the circuit board 190 .

The connector 840 is electrically connected to the second holder 800 and may include a port for electrically connecting to an external device.

In addition, the lens driving device 100 according to the embodiment forms an image of an object in space using reflection, refraction, absorption, interference, diffraction, etc., which are characteristics of light, and aims to increase the visual power of the eye, or It may be included in an optical instrument for the purpose of recording and reproducing an image by means of an optical instrument, or for optical measurement, propagation or transmission of an image. For example, the optical device according to the embodiment may include a smartphone and a portable terminal equipped with a camera.

12 is a perspective view of a portable terminal 200A according to an embodiment, and FIG. 13 is a configuration diagram of the portable terminal 200A shown in FIG. 12 .

12 and 13, the portable terminal 200A (hereinafter referred to as "terminal") has a body 850, a wireless communication unit 710, an A/V input unit 720, a sensing unit 740, an input/ It may include an output unit 750 , a memory unit 760 , an interface unit 770 , a control unit 780 , and a power supply unit 790 .

The body 850 shown in FIG. 12 has a bar shape, but is not limited thereto, and a slide type, a folder type, and a swing type in which two or more sub-bodies are coupled to be movable relative to each other. , and may have various structures such as a swivel type.

The body 850 may include a case (casing, housing, cover, etc.) forming an exterior. For example, the body 850 may be divided into a front case 851 and a rear case 852 . Various electronic components of the terminal may be embedded in a space formed between the front case 851 and the rear case 852 .

The wireless communication unit 710 may include one or more modules that enable wireless communication between the terminal 200A and the wireless communication system or between the terminal 200A and the network in which the terminal 200A is located. For example, the wireless communication unit 710 may include a broadcast reception module 711 , a mobile communication module 712 , a wireless Internet module 713 , a short-range communication module 714 , and a location information module 715 . have.

The A/V (Audio/Video) input unit 720 is for inputting an audio signal or a video signal, and may include a camera 721 , a microphone 722 , and the like.

The camera 721 may be a camera 200 including the camera module 200 according to the embodiment shown in FIG. 12 .

The sensing unit 740 detects the current state of the terminal 200A, such as the opening/closing state of the terminal 200A, the position of the terminal 200A, the presence or absence of user contact, the orientation of the terminal 200A, acceleration/deceleration of the terminal 200A, etc. It is possible to generate a sensing signal for controlling the operation of the terminal 200A by sensing. For example, when the terminal 200A is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. In addition, it is responsible for sensing functions related to whether the power supply unit 790 is supplied with power and whether the interface unit 770 is coupled to an external device.

The input/output unit 750 is for generating input or output related to sight, hearing, or touch. The input/output unit 750 may generate input data for operation control of the terminal 200A, and may also display information processed by the terminal 200A.

The input/output unit 750 may include a keypad unit 730 , a display module 751 , a sound output module 752 , and a touch screen panel 753 . The keypad unit 730 may generate input data in response to a keypad input.

The display module 751 may include a plurality of pixels whose color changes according to an electrical signal. For example, the display module 751 may include a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, or a three-dimensional (3D) display module. It may include at least one of a display (3D display).

The sound output module 752 outputs audio data received from the wireless communication unit 710 in a call signal reception, a call mode, a recording mode, a voice recognition mode, or a broadcast reception mode, or stored in the memory unit 760 . Audio data can be output.

The touch screen panel 753 may convert a change in capacitance generated due to a user's touch on a specific area of the touch screen into an electrical input signal.

The memory unit 760 may store a program for processing and control of the control unit 780, and stores input/output data (eg, phone book, message, audio, still image, photo, video, etc.) Can be temporarily saved. For example, the memory unit 760 may store an image captured by the camera 721 , for example, a photo or a moving picture.

The interface unit 770 serves as a passage for connecting to an external device connected to the terminal 200A. The interface unit 770 receives data from an external device, receives power and transmits it to each component inside the terminal 200A, or transmits data inside the terminal 200A to an external device. For example, the interface unit 770 includes a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port for connecting a device having an identification module, and an audio I/O (Input/O) Output) port, video I/O (Input/Output) port, and may include an earphone port, and the like.

The controller 780 may control the overall operation of the terminal 200A. For example, the controller 780 may perform related control and processing for a voice call, data communication, video call, and the like. The control unit 780 may include the panel control unit 144 of the touch screen panel driving unit illustrated in FIG. 1 , or may perform a function of the panel control unit 144 .

The controller 780 may include a multimedia module 781 for playing multimedia. The multimedia module 781 may be implemented within the controller 180 or may be implemented separately from the controller 780 .

The controller 780 may perform a pattern recognition process capable of recognizing a handwriting input or a drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 790 may receive external power or internal power under the control of the control unit 780 to supply power required for operation of each component.

Features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by a person skilled in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

Claims (12)

housing;
a bobbin disposed inside the housing and movable in an optical axis direction;
a position sensor disposed on a first side of the housing; and
Corresponding to the position sensor and comprising a magnet disposed on the bobbin,
a first distance between the outer surface of the first side of the housing and the center of the bobbin is greater than a second distance between the outer surface of the first side of the housing and the center of the housing;
Each of the center of the bobbin and the center of the housing is a center in a plane perpendicular to the optical axis. The method of claim 1,
the first distance is greater than a third distance between the center of the bobbin on the outer surface of the second side of the housing;
The second side of the housing is positioned opposite to the first side of the housing with respect to the optical axis. The method of claim 1,
a distance between the first outer surface of the bobbin and the center of the bobbin is greater than a distance between the first outer surface of the bobbin and the center of the housing;
The first outer surface of the bobbin is an outer surface corresponding to the first side of the housing. The method of claim 1,
the housing includes a second side opposite to the first side of the housing with respect to the optical axis;
a length in a first horizontal direction of the first side of the housing is greater than a length in the first horizontal direction of a second side of the housing;
The first horizontal direction is a direction from the first side of the housing to the second side of the housing. The method of claim 1,
the housing includes a second side opposite to the first side of the housing with respect to the optical axis;
wherein the center of the bobbin is located between the center of the housing and the second side of the housing. The method of claim 1,
and a circuit board disposed on the first side of the housing and electrically connected to the position sensor. The method of claim 1,
The magnet is disposed on a first outer surface of the bobbin opposite to the first side of the housing. 8. The method of claim 7,
A lens driving device in which a groove for arranging the magnet is formed in the first outer surface of the bobbin. The method of claim 1,
The position sensor is an IC (Integrated Circuit) including a Hall sensor and a driver, a lens driving device. According to claim 6,
A distance between the circuit board and the center of the bobbin is greater than a second distance between the circuit board and the center of the housing. housing;
a bobbin disposed inside the housing and movable in an optical axis direction;
a circuit board disposed on a first side of the housing;
a position sensor disposed on the first side of the housing and electrically connected to the circuit board; and
Corresponding to the position sensor and comprising a magnet disposed on the bobbin,
A first distance between the circuit board and the center of the bobbin is greater than a second distance between the circuit board and the center of the housing,
Each of the center of the bobbin and the center of the housing is a center in a plane perpendicular to the optical axis. 12. The method of claim 11,
the housing includes a second side opposite to the first side of the housing with respect to the optical axis;
a length in a first horizontal direction of the first side of the housing is greater than a length in the first horizontal direction of a second side of the housing;
The first horizontal direction is a direction from the first side of the housing to the second side of the housing.

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