TWI592695B - A lens driving device, a camera unit and a camera using the lens driving device - Google Patents

Description

Lens driving device and camera unit and camera using the same

The present invention relates to a camera shake vibration correcting device, and more particularly to a shake hand vibration correcting device for correcting shaking vibration (vibration) generated when a still image is captured, and capable of capturing an image without image blurring. .

At present, various shake vibration correcting devices (image blur correction devices) have been proposed, and it is possible to prevent image blur on the image plane and perform clear shooting even when there is shaking vibration (vibration) when shooting still images.

For example, Japanese Laid-Open Patent Publication No. 2006-65352 (Patent Document 1) discloses an "image blur correction device" which is controlled to move in two directions orthogonal to each other in a vertical plane of an optical axis. A specific one lens group (hereinafter referred to as a "correction lens") of a photographing optical system (imaging optical system) composed of a plurality of lens groups is used to correct image blur. In the image blur correction device disclosed in Patent Document 1, the fixed frame is movably supported in the vertical direction (pitch direction) and the left-right direction (rolling direction) by the tilting movement frame and the panning movement frame. Correct the lens.

Japanese Laid-Open Patent Publication No. 2008-26634 (Patent Document 2) discloses a A "shake vibration correction mechanism" including a correction optical member that corrects blurring of an image formed by the imaging optical system by moving in a direction intersecting the optical axis of the imaging optical system. In the correction optical member disclosed in Patent Document 2, the lens holding frame that holds the correction lens is movably supported in the pitch direction and the pan direction with respect to the housing tube via the tilt slider and the pan slider.

Japanese Laid-Open Patent Publication No. 2006-215095 (Patent Document 3) discloses an "image blur correction device" capable of correcting image blur quickly and accurately by moving a correction lens with a small driving force. The image blur correction device disclosed in Patent Document 3 has a holding frame that holds the correction lens, and a first slider that slidably supports the holding frame in the first direction (pitch direction), and is in the second direction (rolling direction) a second slider that slidably supports the holding frame, a first coil motor that drives the first slider in the first direction, and a second coil motor that drives the second slider in the second direction.

Japanese Laid-Open Patent Publication No. 2008-15159 (Patent Document 4) discloses a lens barrel having a shake vibration correcting optical system that can be moved in a direction orthogonal to an optical axis. In the shake vibration correction optical system disclosed in Patent Document 4, the movable VR mechanism disposed in the VR main mechanism holds the correction lens (third lens group) and is movable in the XY plane orthogonal to the optical axis.

Japanese Laid-Open Patent Publication No. 2007-212876 (Patent Document 5) discloses an "image blur correction device" which enables the correction lens held by the moving frame to be in the first and second directions orthogonal to the optical axis of the lens system. Moving, controlled by the driving unit to make the optical axis of the correcting lens coincide with the optical axis of the lens system, thereby enabling Correct image blur.

Japanese Laid-Open Patent Publication No. 2007-17957 (Patent Document 6) discloses an "image blur correction device" which is orthogonal to the optical axis of the lens system by the operation of the lens driving portion and orthogonal to each other. The first and second directions drive a correction lens for correcting blurring of an image formed by the lens system to correct image blur. In the image blur correction device disclosed in Patent Document 6, the lens drive unit is disposed on the side in the direction orthogonal to the optical axis of the correction lens.

Japanese Laid-Open Patent Publication No. 2007-17874 (Patent Document 7) discloses an "image blur correction device" that enables a correction lens held by a moving frame to be orthogonal to each other in a direction orthogonal to the optical axis of the lens system. The first and second directions are moved to control so that the optical axis of the correction lens coincides with the optical axis of the lens system, whereby image blurring can be corrected. The image blur correction device disclosed in Patent Document 7 has a drive unit having a coil and a magnet that are relatively movable. One of the coil and the magnet is fixed to the moving frame, and the other is fixed to the support frame that movably supports the moving frame. Further, the image blur correction device disclosed in Patent Document 7 has a first Hall element that detects position information on a first direction of a correction lens by detecting a magnetic force of a magnet, and detects a magnetic force by detecting a magnetic force of the magnet. A second Hall element that corrects positional information about the second direction of the lens.

Each of the image blur correction devices (shake vibration correction devices) disclosed in Patent Documents 1 to 7 has a configuration in which the adjustment correction lens is moved in a plane perpendicular to the optical axis. However, the image blur correction device (shake vibration correction device) of such a configuration has a problem that the structure is complicated and it is not suitable for miniaturization.

In order to solve such a problem, the following image blur correction device (image shake vibration correction device) is proposed which employs a lens module (camera module) that holds a lens and an imaging element (image sensor) Shake yourself to correct the shaking vibration (image blur).

For example, Japanese Laid-Open Patent Publication No. 2007-41455 (Patent Document 8) discloses an "image shake vibration correcting device for an optical device" having a lens module that holds a lens and an imaging element, and is rotatably rotated by a rotating shaft a frame structure for supporting the lens module, a driving unit (actuating mechanism) for rotating the lens module to the frame structure by applying a driving force to a driven portion (rotor) of the rotating shaft, and a driving unit (actuating mechanism) A force applying unit (plate spring) that applies a force to the driven portion (rotor) of the rotating shaft. The frame structure consists of an inner frame and an outer frame. The drive unit (actuation mechanism) is configured to contact the driven portion (rotor) of the rotating shaft from a direction perpendicular to the optical axis. The drive unit (actuating mechanism) is composed of a piezoelectric element and an acting portion on one side of the rotating shaft. The acting portion drives the rotating shaft by the pitch vibration and the bending vibration of the piezoelectric element.

In addition, Japanese Laid-Open Patent Publication No. 2007-93953 (Patent Document 9) discloses a "shake shake correction device for a camera" in which a camera module that integrates a photographing lens and an image sensor is housed inside the casing. At the same time, the camera module is orthogonal to the shooting optical axis, and the first axis and the second axis perpendicularly intersecting each other are pivotally supported on the casing at the center, corresponding to the vibration sensor detected by the shaking hand sensor. The vibration of the casing shakes the movement of the entire camera module inside the casing to correct the shaking vibration when shooting still images. The shake vibration correcting device for a camera disclosed in Patent Document 9 has: from the outside of the inner frame of the fixed camera module, Supporting a first frame at a center of the inner frame of the inner frame of the fixed camera module; the outer frame of the inner frame is fixed on the outer casing, and the outer frame of the middle frame is freely rockable from the outer side of the middle frame; Installed in the middle frame, corresponding to the first driving unit that shakes the inner frame around the first axis corresponding to the shaking vibration signal from the shaking hand vibration sensor (the first sensor module that detects the shaking vibration of the pitch direction) a second driving unit mounted in the outer frame and corresponding to the shaking vibration signal from the shaking vibration sensor (the second sensor module for detecting the shaking vibration of the pan direction) to swing the middle frame around the second axis; . The first driving unit is rotated by the first stepping motor, the first reduction gear set that is rotationally decelerated, and the gear of the final stage, and the first frame is provided by the first cam follower provided on the inner frame A cam is composed. The second driving unit is rotated by the second stepping motor, the second reduction gear set that is rotationally decelerated, and the gear of the final stage, and the second cam follower disposed on the middle frame shakes the middle frame Two cams come together.

Japanese Laid-Open Patent Publication No. 2007-142938 (Patent Document 10) discloses a portable information terminal having a function of correcting shaking vibration at the time of shooting using an angular velocity sensor such as a gyroscope. In the correction of the shaking vibration of the captured image, it is necessary to set the pitch axis and the pan axis to be orthogonal to each other in the plane orthogonal to the optical axis of the camera lens, and to detect the pitch axis as the pitch axis. The rotation of the central axis of rotation and the angular velocity of both of the rotations of the pan axis as the central axis of rotation are detected. Patent Document 10 discloses that a first gyroscope that detects a rotational angular velocity about a rotation of a pitch axis and a second gyroscope that detects a rotational angular velocity about a rotation of the pan axis are disposed on a side surface of the photographing device.

Since the image blur correction device (shake vibration correction device) disclosed in the above Patent Documents 1 to 7 moves the adjustment lens in a plane perpendicular to the optical axis, it has a problem that the structure is complicated and it is not suitable for downsizing.

On the other hand, in the image shake vibration correcting device disclosed in Patent Document 8, an actuating mechanism composed of a piezoelectric element and an acting portion on the side of the rotating shaft is used as the driving unit (actuating mechanism). The action portion is subjected to an elliptical motion to rotate the rotor (driven portion). When wear occurs at the point of action of the rotor (the driven portion) and the acting portion of the actuating mechanism, it is possible to hinder the correct contact. Therefore, in order to reduce this wear, it is necessary to use a special material as a rotor (driven part). Further, in the actuating mechanism composed of the piezoelectric element and the acting portion, since the acting portion is in contact with the rotor (driven portion), it is difficult to return the lens module to its neutral position (initial position).

Further, in the shake vibration correcting device disclosed in Patent Document 9, a combination of a stepping motor, a reduction gear set, and a cam is used as the drive unit. Therefore, it is necessary to bring the cam follower into contact with the cam surface of the cam by the force of the torsion spring. Therefore, the structure of the drive unit is complicated. Further, since the cam follower abuts against the cam surface of the cam, it is difficult to return the camera module to its neutral position (initial position).

As the shake hand vibration sensor, the portable information terminal disclosed in Patent Document 10 discloses only the use of an gyro equal angular velocity sensor.

[Prior Art Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2006-65352

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2008-26634

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2006-215095

[Patent Document 4] Japanese Patent Laid-Open Publication No. 2008-15159

[Patent Document 5] Japanese Patent Laid-Open Publication No. 2007-212876

[Patent Document 6] Japanese Patent Laid-Open Publication No. 2007-17957

[Patent Document 7] Japanese Patent Laid-Open Publication No. 2007-17874

[Patent Document 8] Japanese Patent Laid-Open Publication No. 2007-41455

[Patent Document 9] Japanese Patent Laid-Open Publication No. 2007-93953

[Patent Document 10] Japanese Laid-Open Patent Publication No. 2007-142938 (paragraph 0005, paragraph 0006, Fig. 2)

Accordingly, it is an object of the present invention to provide a shaker vibration correcting device of a drive unit (actuating mechanism) having a simple structure.

Another object of the present invention is to provide a shake vibration correcting device that can easily return a camera module to a neutral position (initial position).

Other objects of the invention will become apparent as the description progresses.

According to the present invention, the following shaker vibration correcting device (30, 30A) can be obtained by holding the lens module (L1, L2, L3) and the camera module (20) of the imaging element (28) with the optical axis (O) The hand shake vibration is corrected by oscillating around the first axis (P) and the second axis (Y) that intersect each other, and the shake vibration correcting device (30, 30A) has a camera module fixed therein. The inner frame (32) of (20) supports the inner frame (34) of the inner frame freely around the first axis (P) from the outer side of the inner frame, and supports the inner frame (Y) freely around the second axis (Y) from the outer side of the middle frame The outer frame of the middle frame (36), And a voice coil motor (40) disposed at the bottom of the inner frame and at the bottom of the outer frame, and driven to swing the inner frame (32) and the middle frame (34) around the first axis (P) and the second axis (Y), respectively.

In the above-described shake vibration correcting device (30, 30A) of the present invention, preferably, the voice coil motor (40) is composed of, for example, a 4-pole magnetizing magnet (42), a coil substrate (44), and a neutral holding plate (46). The four-pole magnetizing magnet (42) is mounted on the bottom of the outer frame (36), and four magnetic poles are disposed in a rotationally symmetric manner about a central axis (C) of the outer frame, and the coil substrate (44) faces the four-pole magnetizing magnet. Provided at the bottom of the inner frame (32), four coils (44-1, 44-2, arranged symmetrically about the optical axis (O)) are disposed between adjacent magnetic poles of the four-pole magnetizing magnet (42). 44-3, 44-4) The neutral holding plate (46) is attached to the coil substrate in a state of being sandwiched between the four coils so as to face the four-pole magnetizing magnet.

In the above-described shake vibration correcting device (30) of the present invention, there may be provided a position detecting unit (50) for detecting the position of the inner frame (32) with respect to the outer frame (36). The position detecting unit (50) may be mounted on the coil substrate (44) to detect the first position of the first position with the shaking around the first axis (P) by detecting the magnetic force of the 4-pole magnetizing magnet (42) a Hall element (51) and a second surface mounted on the coil substrate (44) for detecting a second position of shaking with respect to the second axis (Y) by detecting a magnetic force of the 4-pole magnetizing magnet (42) The Hall element (52) is constructed.

In the above-described shake vibration correcting device (30A) of the present invention, the outer frame (36) can be fixed to the casing as a fixing portion, and the inner frame (32) has an outer wall having a first and a first The first axis and the second axis (P, Y) are orthogonal Side (32-1, 32-2). At this time, the preferred shake vibration correcting device (30A) further has a first shake vibration sensor mounted on one side of the first side (32-1) and the second side (32-2) of the outer wall of the inner frame. (61), to detect the shaking vibration of the inner frame (32) around the first axis (P), and to mount the first side (32-1) of the outer wall of the inner frame and the other side of the second side (32-2) The second shaking hand vibration sensor (62) detects the shaking vibration of the inner frame (32) around the second axis (Y). The first shaker vibration sensor may be constituted by a first angular velocity sensor (61) that detects a rotational angular velocity about the first axis (P), and the second shaker vibration sensor may be detected by the second axis ( The second angular velocity sensor (62) of the angular velocity of Y) is constructed. The first angular velocity sensor is constituted, for example, by a first gyro sensor (61), and the second angular velocity sensor is constituted, for example, by a second gyro sensor (62).

The reference symbols in the above parentheses are added for easy understanding, but are merely examples, and the present invention is not limited thereto.

In the present invention, as the driving unit (actuating mechanism), since the voice coil motor provided at the bottom of the inner frame and the bottom of the outer frame is used, there is an advantage that the structure of the driving unit (actuating mechanism) is simple.

10, 10A‧‧‧ camera institutions

20‧‧‧ camera module

22‧‧‧Modular housing

24‧‧‧Upper side cover

24a‧‧‧Cylinder

26‧‧‧Lower base

28‧‧‧Photographing components

30, 30A‧‧‧Shake vibration correction device (shake vibration correction mechanism)

32‧‧‧ inside frame

32a‧‧‧pitch support shaft

32-1‧‧‧ first side

32-2‧‧‧ second side

34‧‧‧ middle frame

34a‧‧‧pitch support (support hole)

34b‧‧‧Rolling support shaft

36‧‧‧Front frame

36a‧‧‧Rolling support (support hole)

40‧‧‧ voice coil motor (VCM)

42‧‧‧4 pole magnetized magnet

44‧‧‧Coil substrate

44-1~44-4‧‧‧ coil

44P‧‧‧First direction actuation mechanism

44Y‧‧‧Second direction actuation mechanism

46‧‧‧Neutral holding plate (yoke)

50‧‧‧ Position detection unit (position sensor)

51, 52‧‧‧ Hall element

61‧‧‧First gyroscope sensor (pitch direction gyroscope)

62‧‧‧Second Gyro Sensor (Rolling Direction Gyro)

100‧‧‧Mobile phone with camera

110‧‧‧All Control Department

112, 112A‧‧‧Shake vibration correction control unit

122‧‧‧Timed Generator

124‧‧‧ Analogy Processing Department

126‧‧‧Image Processing Department

128‧‧‧ image memory

130‧‧‧Display Department

132‧‧‧Image Recording Department

134‧‧‧Focus Control Department

136‧‧‧Shutter Drive Department

200, 200A‧‧‧ shake vibration correction actuating mechanism

202‧‧‧pitch direction gyroscope

204‧‧‧Rotating direction gyroscope

206‧‧‧Shutter button

212‧‧‧Shake vibration detection circuit

214‧‧‧Sequence control circuit

216‧‧‧Shake hand vibration detection circuit

218‧‧‧ coefficient conversion circuit

220, 220A‧‧‧ control circuit

222‧‧‧ drive circuit

L1, L2, L3‧‧ lens

O‧‧‧ optical axis

The central axis of the C‧‧‧ frame

P‧‧‧First axis (pitch axis, pitch direction)

Y‧‧‧Second axis (rolling axis, roll direction)

1 is an exploded perspective view showing a camera mechanism including a shaker vibration correcting device according to a first embodiment of the present invention; FIG. 2 is a plan view of the camera mechanism shown in FIG. 1, and FIG. 3 is a front view of the camera mechanism shown in FIG. Sectional view; Figure 4 is an exploded perspective view showing a voice coil motor (VCM) used in the shake vibration correcting device shown in Figure 1; Figures 5(A) and (B) are for explaining the voice coil motor shown in Figure 4 ( FIG. 6 is a square block diagram showing the structure of a camera-attached mobile phone mounted with the camera mechanism shown in FIGS. 1 to 3; FIG. 7 is a view showing the structure shown in FIGS. 1 to 3. A block diagram of a configuration of a shaker vibration correcting actuating mechanism that is controlled by a shaking vibration correcting device (shake hand vibration correcting mechanism); and FIG. 8 shows a state in which the present invention is included in a state in which a four-pole magnetizing magnet and an outer frame are taken out. A perspective view of a camera mechanism of the shake vibration correcting device of the second embodiment; and FIG. 9 is a shake vibration correcting actuating mechanism for controlling the shake vibration correcting device (shake vibration correcting mechanism) shown in FIG. Block diagram of the structure.

Embodiments of the present invention will be described below with reference to the drawings.

A camera mechanism 10 including the shake vibration correcting device 30 according to the first embodiment of the present invention will be described with reference to Figs. 1 to 3 . FIG. 1 is an exploded perspective view showing the camera mechanism 10. FIG. 2 is a plan view of the camera mechanism 10 shown in FIG. 1. 3 is a front cross-sectional view of the camera mechanism 10 shown in FIG. 1.

The camera mechanism 10 is composed of a camera module 20 and a shake vibration correcting device 30. The camera module 20 holds a lens and an imaging element which will be described later. The illustrated camera module 20 includes an autofocus lens drive unit.

The autofocus lens driving unit is composed of a lens movable portion and a lens driving portion to make. The lens driving unit slidably supports the lens movable portion in the optical axis O direction while driving the lens movable portion.

The camera module 20 has a module housing 22. The module housing 22 includes a cup-shaped upper side cover 24 and a lower side base 26. The upper surface of the upper side cover 24 has a cylindrical portion 24a having the optical axis O of the lens as a central axis. On the other hand, an imaging element (described later) disposed on a substrate (not shown) is attached to a central portion of the lower base 26. The imaging element captures a captured image imaged by a lens (described later) and then converts it into an electrical signal. The imaging element is configured by, for example, a CCD (charge coupled device) type image sensor, a CMOS (complementary metal oxide semiconductor) type image sensor, or the like.

The shaking vibration correcting device 30 is for correcting the shaking vibration by causing the camera module 20 to oscillate around the first axis P and the second axis Y which are orthogonal to the optical axis O and intersect each other. In the illustrated example, the first axis P is a pitch axis extending in the pitch direction, and the second axis Y is a roll axis extending in the roll direction.

The shake vibration correcting device 30 includes an inner frame 32, a middle frame 34, and an outer frame 36. The inner frame 32 is for fixing (holding) the camera module 20 therein. The inner frame 32 has a pair of pitch support shafts 32a, 32a (only one of which is shown in Fig. 1) that protrudes outward toward the middle frame 34 in the direction of the first axis (pitch axis) P (pitch direction). The middle frame 34 rotatably supports the inner frame 32 from the outer side of the inner frame 32 around the first shaft (pitch axis) P. Therefore, the middle frame 34 has a pair of pitch receiving portions (bearing holes) 34a, 34a extending in the direction of the first axis (pitch axis) P (pitch direction), in which the pair of pitch receiving portions are received The pair of pitch support shafts 32a and 32a are inserted into the holes 34a and 34a.

The middle frame 34 has a pair of roll support shafts 34b and 34b (only one of which is shown in Fig. 1) which protrudes outward toward the outer frame 36 in the direction of the second axis (crossing axis) Y (the roll direction). The outer frame 36 supports the middle frame 34 freely from the outer side of the middle frame 34 around the second axis (rolling axis) Y. Therefore, the outer frame 36 has a pair of roll receiving portions (receiving holes) 36a, 36a extending in the direction of the second axis (crossing axis) Y (the roll direction), in which the pair of roll receiving portions are received The pair of roll support shafts 34b and 34b are inserted into the holes 36a and 36a.

The outer frame 36 is fixed to the casing of the camera-attached mobile phone 100 (Fig. 6) which will be described later.

In the above embodiment, the two-axis fitting portion is formed by the cylindrical shape of the unevenness. That is, the pair of tilt support shafts 32a, 32a and the pair of roll support shafts 34b, 34b respectively form a convex cylindrical shape, a pair of pitch receiving portions (receiving holes) 34a, 34a and a pair of roll receiving portions (receiving holes) ) 36a, 36a respectively form a concave cylindrical shape. Therefore, it is possible to generate some gaps in the two-axis fitting portion. In this regard, the support shaft may have a conical shape, and the receiving portion (the receiving hole) may have a meander shape.

The shaker vibration correcting device 30 further has a voice coil motor (VCM) 40 (described later) provided at the bottom of the inner frame 32 and the bottom of the outer frame 36. The voice coil motor 40 is driven such that the inner frame 32 and the middle frame 34 are respectively rocked about the first axis (pitch axis) P and the second axis (rolling axis) Y.

FIG. 4 is an exploded perspective view showing a voice coil motor (VCM) 40 used in the shake vibration correcting device 30.

In addition to FIG. 3, a shaker vibration correcting device will be described with reference to FIG. Voice coil motor (VCM) 40 used in 30.

The voice coil motor (VCM) 40 includes a 4-pole magnetizing magnet 42 attached to the bottom of the outer frame 36, a coil substrate 44 disposed on the inner frame 32 opposite to the 4-pole magnetizing magnet 42, and a neutral holding plate (yoke). 46 constitutes.

The four magnetic poles of the 4-pole magnetizing magnet 42 are rotationally symmetrically disposed around the central axis C of the outer frame 36. On the coil substrate 44, first to fourth coils 44-1, 44-2, 44-3, and 44 arranged symmetrically about the optical axis O are disposed between adjacent magnetic poles of the four-pole magnetizing magnet 42. 4. The neutral holding plate (yoke) 46 is attached to the coil substrate 44 so as to face the four-pole magnetizing magnet 42 while being sandwiched between the first to fourth coils 44-1 to 44-4.

The illustrated coil substrate 44 is composed of a plurality of layers of a multilayer substrate. Therefore, the first to fourth coils 44-1 to 44-4 are formed inside the coil substrate (multilayer substrate) 44. The first coil 44-1 and the third coil 44-3 are formed on a plurality of layers of the coil substrate 44 by one coil wire. That is, the first coil 44-1 and the third coil 44-3 are connected in series. On the other hand, with one coil wire, the second coil 44-2 and the fourth coil are formed on the coil substrate 44 on a plurality of other layers different from the layers in which the first coil 44-1 and the third coil 44-3 are formed. 44-4. That is, the second coil 44-2 and the fourth coil 44-4 are connected in series.

As shown in FIG. 4, the first coil 44-1 and the third coil 44-3 are disposed apart from each other in the pitch direction P from the optical axis O. The second coil 44-2 and the fourth coil 44-4 are disposed apart from each other in the roll direction Y from the optical axis O. The combination of the first coil 44-1 and the third coil 44-3 is used to rock the camera module 20 about the first axis (pitch axis) P, Therefore, it is also called the pitch coil mode. The combination of the second coil 44-2 and the fourth coil 44-4 is used to rock the camera module 20 around the second axis (rolling axis) Y, so it is also referred to as a panning coil mode.

When the current does not flow in the first to fourth coils 44-1 to 44-4 (when the power is not supplied), the camera module 20 can be held in the neutral position (initial position). The neutral holding plate 46 (yoke) is disposed on the opposing surface of the 4-pole magnetizing magnet 42. Therefore, when the power is not supplied, it can be seen from FIGS. 2 and 3 that the optical axis O coincides with the central axis C of the outer frame 36.

Further, the four-pole magnetizing magnet 42 is placed on the bottom surface of the outer frame 36 so that the autofocus corresponding camera module 20 is not affected by the magnetic field.

In the illustrated example, one 4-pole magnetizing magnet is used as the magnet 42, but four flat-plate single-pole magnets may be disposed.

The illustrated shaker vibration correcting device 30 further has a position detecting unit 50 for detecting the position of the inner frame 32 with respect to the outer frame 36. The illustrated position detecting unit 50 is composed of first and second Hall elements 51, 52 mounted on the coil substrate 44. The first Hall element 51 is mounted on the coil substrate 44 at a position farther from the optical axis O than the third coil 44-3 in the pitch direction P. The second Hall element 52 is mounted on the coil substrate 44 at a position farther from the optical axis O than the fourth coil 44-4 in the roll direction Y. The first Hall element 51 detects the first position (pitch position) of the wobble around the first axis (pitch axis) P by detecting the magnetic force of the 4-pole magnetizing magnet 42. The second Hall element 52 detects the second position (crossing position) of the wobble around the second axis (crossing axis) Y by detecting the magnetic force of the 4-pole magnetizing magnet 42.

Next, the operation of the voice coil motor (VCM) 40 will be described with reference to Fig. 5 .

Fig. 5(A) is a view in which the first to fourth coils 44-1 to 44-4 and the first and second Hall elements 51 and 52 formed on the 4-pole magnetizing magnet 42 and the coil substrate 44 are extracted. Fig. 5(A) shows the arrangement when the first to fourth coils 44-1 to 44-4 are not energized. Therefore, the optical axis O coincides with the central axis C of the outer frame 36. That is, the camera module 20 is placed in the neutral position (initial position). At this time, the first and second Hall elements 51, 52 do not generate an output voltage.

In this state, as shown in FIG. 5(A), it is assumed that the current I flows in the first and third coils (pitch coil modes) 44-1 and 44-3. At this time, due to the interaction between the magnetic field (magnetic flux) of the four-pole magnetizing magnet 42 and the current I flowing through the pitch coil patterns 44-1 and 44-3, according to Fleming's left-hand rule, for pitching An electromagnetic force (thrust) F is generated in the coil patterns 44-1 and 44-3. As a result, the inner frame 32 (camera module 20) is rocked about the first axis (pitch axis) P.

FIG. 5(B) shows a state in which the position of the inner frame 32 (camera module 20) is shifted by the electromagnetic force (thrust) F of the pitch coil patterns 44-1 and 44-3. The positional shift is generated in the neutral holding plate (yoke) 46, and the reaction force indicated by the arrow in Fig. 5(B) is generated.

The inner frame 32 (camera module 20) is held with respect to the outer frame 36 by the balance of the thrust F of the coil shown in Fig. 5(A) and the reaction force generated in the neutral holding plate (yoke) 46.

At this time, since the first Hall element 51 is displaced with respect to the first position (pitch position) of the 4-pole magnetizing magnet 42, the first position (pitch position) is generated. Corresponding voltage.

Fig. 5 illustrates the operation when the current I flows through the first and third coils (pitch coil mode) 44-1, 44-3, and the second and fourth coils (cross roll mode) 44-2. When the current I flows through 44-4, the same operation is performed. That is, the interaction between the magnetic field (magnetic flux) of the four-pole magnetizing magnet 42 and the current I flowing through the rolling coil patterns 44-2 and 44-4 is used for the panning according to Fleming's left-hand rule. An electromagnetic force (thrust) F is generated in the coil patterns 44-2 and 44-4. As a result, the inner frame 32 (camera module 20) is rocked about the second axis (rolling axis) Y. The inner frame 32 (camera module 20) is held with respect to the outer frame 36 by the balance of the thrust F of the coil and the reaction force generated in the neutral holding plate (yoke) 46. Since the second Hall element 52 is displaced with respect to the second position (rolling position) of the 4-pole magnetizing magnet 42, a voltage corresponding to the second position (rolling position) is generated.

Fig. 6 is a block diagram showing the configuration of a camera-attached mobile phone 100 to which the camera mechanism 10 shown in Figs. 1 to 3 is mounted.

The camera module 20 holds a plurality of lenses L1, L2, L2 and an imaging element 28. In the illustrated example, the lens L2 is an autofocus lens.

The mobile phone 100 with a camera has an overall control unit 110. The entire control unit 110 incorporates a shaker vibration correction control unit 112. The overall control unit 110 is connected to a timing generator (TG) 122. The signal captured by the imaging element 28 is supplied to an analog processing unit (AFE) 124. Timing generator (TG) 122 provides timing signals to imaging component 28 and analog processing unit (AFE) 124. The signal processed by the analog processing unit (AFE) 124 is recorded after being subjected to image processing by the image processing unit 126 (guarantee Stored in image memory 128. The image processing unit 126 and the image memory 128 are controlled by the overall control unit 110.

The display unit 130 and the image recording unit 132 are connected to the entire control unit 110. Further, the overall control unit 110 transmits a focus command signal to the focus control unit 134. In response to the focus command signal, the focus control unit 134 moves the lens L2 in the camera module 20 along the optical axis. The overall control unit 110 transmits a shutter control signal to the shutter drive unit 136. In response to the shutter control signal, the shutter drive unit 136 drives a shutter (not shown) of the camera mechanism 10.

FIG. 7 is a block diagram showing a configuration of the shake vibration correcting actuation mechanism 200 that controls the shake vibration correcting device (shake vibration correcting mechanism) 30.

In the casing (not shown) of the mobile phone 100 with the camera attached, a pitch direction gyro 202 for detecting the shaking vibration of the pitch direction (shake vibration about the tilt axis P) is provided, and In the roll direction gyro 204 for detecting the shaking vibration of the roll direction (shake vibration around the roll axis Y).

The pitch direction gyro 202 detects the angular velocity in the pitch direction, and outputs a pitch direction angular velocity signal (first angular velocity signal) indicating the angular velocity of the detected pitch direction. The roll direction gyro 204 detects the angular velocity in the roll direction, and outputs a roll direction angular velocity signal (second angular velocity signal) indicating the angular velocity of the detected roll direction. The first and second angular velocity signals are supplied to the shaker vibration correction control unit 112. A shutter operation command signal is supplied from the shutter button 206 to the shake vibration correction control unit 112.

The shaking hand vibration correction control unit 112 has a first and second angular velocities according to The detection signal detects the shaking vibration detecting circuit 212 of the shaker vibration of the casing of the camera-attached mobile phone 100, and the sequence control circuit 214 that receives the shutter operation command signal. The shaking hand vibration detecting circuit 212 includes a filter circuit and an amplifying circuit. The shaking hand vibration detecting circuit 212 supplies a shaking hand vibration detecting signal to the shaking hand vibration amount detecting circuit 216. The shaking hand vibration amount detecting circuit 216 detects the shaking vibration amount of the casing of the camera-attached mobile phone 100 based on the shaking hand vibration detecting signal, and transmits the shaking hand vibration amount detecting signal to the coefficient converting circuit 218. The coefficient conversion circuit 218 performs coefficient conversion on the shake vibration amount detection signal, and transmits the coefficient-converted signal to the control circuit 220. A position detection signal from a position detecting unit (position sensor) 50 provided in the shake vibration correcting means (shake vibration correcting means) 30 is supplied to the control circuit 220.

The control circuit 220 responds to the coefficient-converted signal, and outputs a control signal based on the position detection signal, the control signal canceling the shaking vibration detected by the shaker vibration detecting circuit 212. The sequence control circuit 214 controls the timing of the shaker vibration amount detecting circuit 216, the coefficient converting circuit 218, and the control circuit 220 in response to the shutter operation command signal. A control signal is provided to the drive circuit 222.

As described above, as the voice coil motor 40, the shake vibration correcting device (shake vibration correcting mechanism) 30 has a wobble coil mode for shaking the camera module 20 around the first axis (pitch axis) P (44- 1, 44-3), and a roll mode (44-2, 44-4) for panning the camera module 20 around the second axis (rolling axis) Y. The pitch coil mode (44-1, 44-3) is also referred to as a first direction actuating mechanism 44P, and the roll coil mode (44-2, 44-4) is also referred to as a second direction actuating mechanism. 44Y. In short, the shaking hand vibration correcting device (shake hand vibration correcting mechanism) 30 includes the first direction The moving mechanism 44P and the second direction actuating mechanism 44Y.

The drive circuit 222 drives the first direction actuation mechanism 44P and the second direction actuation mechanism 44Y in response to the control signal.

With such a configuration, the camera module 20 can be shaken to cancel the shaking vibration of the casing of the camera-attached mobile phone 100. As a result, the shaking vibration can be corrected.

A camera mechanism 10A including the shake vibration correcting device 30A according to the second embodiment of the present invention will be described with reference to Fig. 8 . FIG. 8 is a perspective view showing the camera mechanism 10A in a state where the four-pole magnetizing magnet 42 and the outer frame 36 are removed.

The illustrated shaker vibration correcting device 30A has the first and second gyro sensors 61 and 62, and simultaneously removes the first and second Hall elements 51, 52, and has FIGS. 1 to 3 The illustrated shaker vibration correcting device 30 has the same configuration. Therefore, the same components as those shown in FIGS. 1 to 3 are denoted by the same reference numerals, and only the differences will be described below for simplicity of explanation.

The inner frame 32 has an outer wall having a first side surface 32-1 orthogonal to the first axis (pitch axis) P and a second side surface 32-2 orthogonal to the second axis (crossing axis) Y. The first gyro sensor 61 is mounted on the first side 32-1 of the outer wall of the inner frame 32, and the second gyro sensor 62 is mounted on the second side 32-2 of the outer wall of the inner frame 32. The first gyro sensor 61 acts as a first angular velocity sensor that detects a rotational angular velocity about a first axis (pitch axis) P, and the second gyro sensor 62 acts as a detection around the second axis (rolling The second angular velocity sensor of the rotational angular velocity of the axis Y operates. In other words, the first gyro sensor 61 surrounds the detection inner frame 32 The first shake vibration sensor of the shake vibration of one axis (pitch axis) P operates, and the second gyro sensor 62 serves as a shake vibration for detecting the inner frame 32 around the second axis (roll axis) Y The second shaking hand vibration sensor operates.

Therefore, the first gyro sensor 61 is also referred to as a pitch direction gyro, and the second gyro sensor 62 is also referred to as a roll direction gyro.

In the shake vibration correcting device 30A shown in FIG. 8, the first gyro sensor 61 is mounted on the first side surface 32-1 of the outer wall of the inner frame 32, and the second gyro sensor 62 is mounted on the inner frame 32. The second side 32-2 of the outer wall is on, but can also be mounted oppositely. That is, the first gyro sensor 61 can be mounted on the second side 32-2 of the outer wall of the inner frame 32, and the second gyro sensor 62 can be mounted on the first side 32-1 of the outer wall of the inner frame 32.

FIG. 9 is a block diagram showing a configuration of a shake vibration correcting actuation mechanism 200A that controls the shake vibration correcting device (shake vibration correcting mechanism) 30A shown in FIG. 8.

In the shake vibration correcting actuation mechanism 200 shown in FIG. 7, the pitch direction gyro 202 and the roll direction gyro 204 are mounted on the casing of the camera-attached mobile phone 100, but as shown in FIG. In the shaking hand vibration correction actuation mechanism 200A, the first gyro sensor (pitch direction gyro) 61 and the second gyro sensor (rolling direction gyro) 62 are directly mounted on the shake vibration correcting device. (Shake the hand vibration correction mechanism) 30A.

Further, with respect to the shake vibration correcting device (shake vibration correcting mechanism) 30 shown in Fig. 7, there is a position sensor (Hall element) 50, and the shaking hand shown in Fig. 9 The vibration correcting device (shake vibration correcting mechanism) 30A does not have such a position sensor (Hall element) 50.

The shaker vibration correction actuation mechanism 200A shown in FIG. 9 has the same configuration (operation) as the shake vibration correction control unit, as described below, and has the same configuration as the shake vibration correction actuation mechanism 200 shown in FIG. structure. Therefore, the reference symbol of 112A is given to the shaking vibration correction control unit.

The shake vibration correction control unit 112A has the same configuration as the shake vibration correction control unit 112 shown in FIG. 7 except that the operation of the control circuit is different from that shown in FIG. 7 . Therefore, the control circuit is given a reference symbol of 220A.

The control circuit 220A responds to the signal converted from the coefficient supplied from the coefficient conversion circuit 218, and outputs the feedback control signal so that the outputs of the pitch direction gyro 61 and the roll direction gyro 62 are minimized. The feedback control signal is returned, and the drive circuit 222 drives the first direction actuation mechanism 44P and the second direction actuation mechanism 44Y.

With such a configuration, the camera module 20 can be shaken to cancel the shaking vibration of the inner frame 32 of the lens mechanism 10A of the camera-attached mobile phone 100. As a result, the shaking vibration can be corrected.

As described above, in the shake vibration correcting device of the present invention, as long as the camera module 20 is a standardized camera module, the shake vibration can be corrected.

The present invention has been described above by way of a preferred embodiment, and those skilled in the art can make various changes without departing from the spirit of the invention. For example, in the above embodiment, the voice coil motor may be a 4-pole magnetized magnet provided in the outer frame. The coil substrate is provided in the inner frame, but the present invention is not limited to the voice coil motor configured as described above. For example, the voice coil motor may be constituted by a 4-pole magnetizing magnet provided on the inner frame and a coil substrate provided on the outer frame. Further, in the first embodiment described above, the Hall element is used as the position detecting means (position sensor), but other position detecting means (position sensor) may be used. Further, in the second embodiment described above, an angular velocity sensor such as a gyro sensor is used as the shake vibration sensor, but other shake vibration sensors may be used. EMC measures can also be achieved by mounting a conductive mask on the outside of the camera mechanism.

10‧‧‧ camera organization

20‧‧‧ camera module

22‧‧‧Modular housing

24‧‧‧Upper side cover

24a‧‧‧Cylinder

26‧‧‧Lower base

30‧‧‧Shake vibration correction device (shake vibration correction mechanism)

32‧‧‧ inside frame

32a‧‧‧pitch support shaft

34‧‧‧ middle frame

34a‧‧‧pitch support (support hole)

34b‧‧‧Rolling support shaft

36‧‧‧Front frame

36a‧‧‧Rolling support (support hole)

42‧‧‧4 pole magnetized magnet

44‧‧‧Coil substrate

O‧‧‧ optical axis

The central axis of the C‧‧‧ frame

P‧‧‧First axis (pitch axis, pitch direction)

Y‧‧‧Second axis (rolling axis, roll direction)

Claims (12)

A lens driving device comprising: an autofocus lens driving portion that moves a lens movable portion in an optical axis direction; and a shaking vibration correcting portion that makes the lens movable portion orthogonal to and intersect with an optical axis Moving in the direction; the lens driving device is characterized in that the shaker vibration correcting portion includes: a voice coil motor composed of magnets and coils disposed opposite to each other, and orthogonal to and intersecting with the optical axis Driving the lens movable portion in a direction; and a yoke disposed opposite to the magnet, and moving the lens by magnetic attraction with the magnet when no current flows through the coil The portion is maintained at a predetermined position; and when a current flows through the coil, the yoke holds the lens movable portion at a position where the thrust of the coil and the reaction force of the yoke are balanced. The lens driving device according to claim 1, wherein the shaking vibration correcting portion further includes: an inner frame that houses the lens movable portion inside; and an outer frame that houses the inner frame An inner frame; and a middle frame disposed between the inner frame and the outer frame and received in the outer frame; and the voice coil motor is in the outer frame and is positive with the optical axis Pay and interact with each other The lens movable portion, the inner frame, and the middle frame are driven in a crossing direction. The lens driving device of claim 2, wherein the magnet is disposed on the outer frame, and the coil is disposed in the inner frame. The lens driving device of claim 3, wherein the yoke is disposed in the inner frame. The lens driving device of claim 2, wherein the magnet is disposed in the inner frame, and the coil is disposed on the outer frame. The lens driving device of claim 5, wherein the yoke is disposed on the outer frame. A lens driving device according to claim 1, comprising a Hall element that detects a position of the movable portion of the lens based on a magnetic force of the magnet. A lens driving device according to claim 1, comprising a gyro sensor that detects a shaking vibration of the movable portion of the lens. A camera unit characterized by being equipped with a lens driving device as described in claim 1 of the patent application. The camera unit according to claim 9, which is equipped with an imaging element that captures a captured image imaged by a lens and then converts it into an electrical signal. A camera unit according to claim 10, wherein a cover case is attached to the outside. A camera equipped with a camera unit as described in claim 10 of the patent application.