JP7578428B2 - Light quantity control device and mobile terminal - Google Patents

Description

The present invention relates to a light amount adjustment device provided as an optical system for a camera or the like mounted on a mobile terminal, and to a mobile terminal such as a smartphone that is equipped with the same.

Conventionally, mobile terminals and electronic devices such as smartphones are equipped with optical devices that can take photos and videos. Recent optical devices include those equipped with anti-vibration mechanisms that suppress blurring of captured images caused by camera shake, and those equipped with apertures to improve optical characteristics.

JP 2017-151312 A

However, when an anti-vibration mechanism or the like is operated, if the aperture member that changes the light passage moves in a direction perpendicular to the optical axis, its relative position with the drive mechanism may shift, causing the adjusted light amount to shift.

In view of the above problem, the light amount adjustment device of the present invention has the following features:
A base member having a light passage opening through which light passes;
a plurality of aperture blades arranged annularly around the light passing opening so that the front and back of the aperture blades overlap each other and move forward and backward into the light passing opening to form an aperture;
a drive ring that rotates around the light passing opening to transmit a drive force to the diaphragm blades;
a lens holding member that holds a lens through which the light passes and is movable relative to the base member from a reference position in a direction perpendicular to an optical axis of the light;
a drive lever having an engagement portion that engages with the drive ring and a first magnet;
a drive source having a first coil facing the first magnet and generating a drive force for rotating the drive ring;
the plurality of aperture blades and the drive ring are directly attached to the movable lens holding member;
A predetermined amount of current is applied to the first coil to move the first magnet to a desired position, thereby changing the aperture area to a desired aperture area ;
When the first coil is energized to move the drive lever, the amount of movement of the drive lever is corrected according to the amount of movement of the lens holding member from the reference position in the perpendicular direction .

According to the present invention, the amount of light can be adjusted with high precision even when the aperture member moves in a direction perpendicular to the optical axis.

2 is an example of a mobile terminal according to an embodiment of the present invention. FIG. 1 is a perspective view of a lens unit according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of a lens unit according to an embodiment of the present invention. FIG. 2 is a perspective view of an aperture blade according to an embodiment of the present invention. 5A to 5C are diagrams illustrating the operation of a focus mechanism of the lens unit according to the embodiment of the present invention. 5A to 5C are diagrams illustrating the operation of the vibration isolation mechanism of the lens unit according to one embodiment of the present invention. 5A to 5C are diagrams illustrating the operation of the aperture actuator according to the embodiment of the present invention. FIG. 4 is a state diagram of an aperture according to an embodiment of the present invention. 5A to 5C are diagrams illustrating the operation of the vibration isolation mechanism and the actuator according to the embodiment of the present invention.

First Embodiment
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described in detail with reference to the accompanying drawings. Fig. 1 is a perspective view of a mobile terminal according to the present embodiment, and an example of the mobile terminal is a smartphone.

As shown in FIG. 1, the lens module 100 is provided on the rear side of the smartphone 500, as indicated by the dotted line. In contrast to this lens module 100, a camera module serving as an image sensor is disposed on the front side of the smartphone 500, and a subject image is formed on the imaging surface of the image sensor by a lens disposed inside the lens module 100.

The lens module 100 will now be described in detail. Fig. 2(a) shows a perspective view of the lens module 100 according to this embodiment. Fig. 2(b) shows a perspective view showing the internal structure with some parts removed. Fig. 2(c) shows a perspective view from a direction rotated 180 degrees around the central axis of Fig. 2(b). Fig. 3 shows an exploded perspective view of the lens module 100 according to this embodiment.

As shown in FIG. 3, the lens module 100 has a base member 1, a lens unit 300, a lens holding member 2, a focus base member 18, two vibration-proof coils 3a and 3b (hereinafter collectively referred to as vibration-proof coils 3), two vibration-proof magnets 4a (not shown in FIG. 3) and 4b (hereinafter collectively referred to as vibration-proof magnets 4), a drive lever 5, an aperture magnet 6 attached to the drive lever 5, a number of aperture coils 7, a drive ring 8, a number of aperture blades 9, a blade holder 10, a lens cover 11, and a base cover 12.

The central axis 200 of this lens module 100 is the optical axis of the imaging device. The base member 1 has a rectangular parallelepiped shape, and a space 1a is provided inside in which the focus base member 18 and the lens holding member 2 described later are disposed. A circular light passage opening 1b that passes light is opened around the central axis 200, and holes are opened on the side parallel to the central axis 200 for the vibration isolation coil mounting parts 1c and 1d for mounting the vibration isolation coils 3a and 3b described later, the aperture coil mounting part 1e for mounting the aperture coil 7, and the focus coil mounting part 1f for mounting the focus coil 16, as shown in Figures 2(b) and (c). Figure 2(c) is a perspective view shown from a direction rotated 180 degrees from the central axis of Figure 2(b), and the vibration isolation coil mounting part 1c is provided on the side opposite the aperture coil mounting part 1e, and the focus coil mounting part 1f is provided on the side opposite the vibration isolation coil mounting part 1d.

The lens unit 300 consists of one or more lenses and a lens frame that holds those lenses, and directs light from the subject to the imaging element.

The lens holding member 2 holds the lens unit 300 and is disposed in a space 18a in the center of the focus base member 18. The space 18a in the center of the focus base member 18 is larger than the lens holding member 2, and the lens holding member 2 is movable within the space 18a on a plane perpendicular to the central axis 200 of the lens module 100. As will be described in detail later, in this embodiment, movement on a plane perpendicular to the central axis 200 of the lens module 100 means movement in two directions perpendicular to the two side surfaces of the base member 1 on which the vibration-proof coils 3a and 3b are provided. On one side of the lens holding member 2, an anti-vibration magnet 4a is attached to the surface adjacent to the vibration-proof coil 3a, and on the other side perpendicular to that surface, another anti-vibration magnet 4b is attached to the surface adjacent to the vibration-proof coil 3b.

The lens holding member 2 is the base member of the light amount adjustment device described below, and the surface of the lens module 100 facing the subject is provided with a blade rotation shaft 2a that is the center of rotation of the aperture blades 9 described below, a radial support protrusion 2b that holds the drive ring 8 described below in the radial direction, and a thrust receiving portion 2c that holds it in the thrust direction. Note that in FIG. 3, only one each of the blade rotation shaft 2a and thrust receiving portion 2c is given a reference number, but as shown in FIG. 3, there are multiple pieces of the same configuration as necessary for the number of aperture blades 9 and support of the drive ring 8.

As described above, the focus base member 18 has a space 18a inside in which the lens holding member 2 is placed. A circular light passage opening 18b that allows light to pass is opened around the central axis 200. The focus base member 18 is placed in the space 1a at the center of the base member 1 and can move smoothly in the direction of the central axis 200 relative to the base member 1. During operation, it moves in the direction of the central axis 200 together with the lens holding member 2 that is placed in the space 18a inside the focus base member 18.

The anti-vibration coil 3 is a coil in which a conductive wire is wound and a magnetic field is generated when electricity is passed through it, and two anti-vibration coils 3a and 3b are attached to the base member 1 of the lens module 100. The two anti-vibration coils 3a and 3b are arranged on the sides of the base member 1 that are perpendicular to each other.

The anti-vibration magnet 4 is a rectangular permanent magnet, magnetized with four poles on both sides. Two anti-vibration magnets 4a, 4b are attached to the lens holding member 2, with one anti-vibration magnet 4a positioned to face the anti-vibration coil 3a, and the other anti-vibration magnet 4b positioned to face the other anti-vibration coil 3b different from the anti-vibration coil 3a. The paired anti-vibration coil 3 and anti-vibration magnet 4 are positioned so that the magnetized boundary of the anti-vibration magnet 4 approximately coincides with the coil center axis of the anti-vibration coil 3.

The focusing coil 16 is a coil in which a conductive wire is wound and a magnetic field is generated when electricity is passed through it, and is attached to the base member 1 of the lens module 100. The focusing coil 16 is disposed on the side of the base member 1 facing the vibration isolation coil 3b.

The focusing magnet 17 (see FIG. 5), which is arranged to face the focusing coil 16, is a rectangular permanent magnet that is magnetized with four poles on both sides. It is attached to the focusing base member 18. The focusing magnet 17 is arranged so that the magnetization boundary line of the focusing magnet 17 approximately coincides with the central axis of the focusing coil 16.

The drive lever 5 is disposed on the side of the lens holding member 2 and is disposed so as to face the aperture coil 7. An aperture magnet 6, which will be described later, is fixed to the center of the drive lever 5. The subject side of the drive lever 5 is provided with a drive shaft 5a that is inserted into the connection part 8c of the drive ring 8, and the movement of the drive lever 5 is transmitted to the drive ring 8 via the drive shaft 5a and the connection part 8c, causing the drive ring 8 to rotate.

The aperture magnet 6 is a rectangular permanent magnet that is magnetized in the plate pressure direction. One surface is fixed to the drive lever 5, and the other surface is positioned so that it faces the aperture coil 7.

The aperture coil 7 is a coil in which a conductive wire is wound and a magnetic field is generated when electricity is applied, and three aperture coils 7a, 7b, and 7c are attached to an aperture coil attachment section 1e provided on a surface of the base member 1 of the lens module 100 different from the two surfaces on which the two anti-vibration coils 3 are attached. Note that although three aperture coils 7 are provided in this embodiment, two or four or more may be provided.

The central axis of the aperture device, in which the lens holding member 2, drive ring 8, multiple aperture blades 9, blade holder member 10 and lens cover 11 are stacked in this order in the thrust direction, coincides with the central axis 200 of the lens module 100. In the following explanation, the direction parallel to this central axis 200 is called the thrust direction, and the direction perpendicular to it is called the radial direction.

The aperture blades 9 are arranged in a circumferential direction of the light passage opening 1b formed in the base member 1. In this embodiment, six aperture blades 9 are used. The number of aperture blades is not limited to six, and may be more than one. FIG. 4 shows an enlarged view of one aperture blade 9. The aperture blades 9 are arranged in a ring shape so that the front and back of adjacent aperture blades 9 overlap each other so as to be approximately parallel to the radial direction of the aperture device, and have a flat-shaped light shielding portion 9a having a light shielding function, a rotation shaft hole 9b into which the blade rotation shaft 2a of the lens holding member 2 is inserted and fitted, and a cam groove 9c into which the blade drive shaft 8b provided on the drive ring 8 described later is inserted. The aperture blades 9 advance and retreat within the light passage opening 1b as the drive ring 8 rotates to which the driving force from the drive lever 5 is transmitted, forming an aperture.

The drive ring 8 is ring-shaped with an opening 8a formed in the center, and has a blade drive shaft 8b that fits into the cam grooves 9c of the multiple aperture blades 9. A connection portion 8c is formed on a part of the outer periphery, through which the drive shaft 5a of the drive lever 5 is inserted. In addition, the inner periphery of the drive ring 8 abuts against the radial support protrusion 2b formed on the lens holding member 2, so that the drive ring 8 fits into the lens holding member 2 and is supported rotatably around the central axis 200.

The blade holder 10 is formed in a plate shape with an opening 10a in the center that serves as a light passage opening. As shown in FIG. 2, the cover plate 10 is arranged to cover the diaphragm blades 9 and the drive ring 8 arranged between the cover plate 10 and the lens holding member 2, and is adhesively fixed to the lens holding member 2 to form a space for the diaphragm blades 9 to travel between the drive ring 8 and the cover plate 10. In addition, the blade holder 10 has holes that avoid the movement trajectories of the blade rotation shaft 2a of the lens holding member 2 and the blade drive shaft 8b of the drive ring 8, and in other parts, a blade holder portion is formed that holds the diaphragm blades 9 in the thrust direction so that they do not come off these shafts.

The lens cover 11 is a component that is fixed to the blade holder 10, and the area surrounding the central light passage opening becomes part of the external appearance of the lens module 100. The surface facing the subject can be plated or painted to create an aesthetically pleasing surface.

The base cover 12 is an exterior component of the lens module and is a component that is placed on the outer periphery of the base member 1 and holds the anti-vibration coil 3 and the aperture coil 7.

In the lens module 100 configured as described above, by passing current through the two vibration-proof coils 3, it is possible to perform an image stabilization operation in which the lens (lens holding member 2) is moved in a plane direction perpendicular to the central axis 200 to correct camera shake, and by passing current through the focusing coil 16, it is possible to perform an autofocus operation in which the lens (lens holding member 2) is moved in the direction of the central axis 200 (optical axis direction) to focus. In addition, by passing current through the three aperture coils 7 in a predetermined combination as described below, it is possible to change the aperture opening area and adjust the amount of light.

The focusing operation will be explained using FIG. 5. When current is applied to the focusing coil 16, a magnetic field is generated, and the focusing magnet 17, which is magnetized with four poles on both sides and positioned opposite the focusing coil 16, moves in the direction of the central axis 200, for example from the position shown in FIG. 5(a) to the position shown in FIG. 5(b). There is a correlation between the voltage of the current and the amount of movement, and when the current is applied in the opposite direction, the direction of movement is also reversed. As a result, the lens holding member 2, which is integrated with the focusing magnet 17, can move in the direction of the central axis 200, and focusing is achieved by adjusting the distance between the lens and the image sensor.

The operation of the vibration isolation mechanism will be explained with reference to Figure 6. Figure 6(a) shows the state in which the central axis 200 of the lens module 100 and the central axis of the lens unit 300 are aligned.

Figure 6(b) shows a state in which the central axis of the lens unit 300 is shifted to the right in the figure relative to the central axis 200 of the lens module 100. This is an example of the result of applying current to the anti-vibration coil 3b, which attracts the anti-vibration magnet 4b, which is magnetized in the plate thickness direction. The amount of movement can be changed by the magnitude of the current, and when the current is applied in the opposite direction, the lens unit 300 and lens holding member 2 move to the left in the figure.

Figure 6(c) shows a state in which the central axis of the lens unit 300 is shifted upward in the figure relative to the central axis 200 of the lens module 100. This is an example of the result of magnetized anti-vibration magnet 4a being attracted by passing current through anti-vibration coil 3a. Furthermore, if the current is passed in the opposite direction, lens unit 300 and lens holding member 2 move downward in the figure.

Figure 6(d) shows a state in which the central axis of the lens unit 300 is shifted toward the upper right in the figure relative to the central axis 200 of the lens module 100. This is an example of the result of magnetized anti-vibration magnets 4a, 4b being attracted by passing current through anti-vibration coils 3a and 3b. Furthermore, if the direction of current is reversed, the lens unit 300 and lens holding member 2 move toward the lower left in the figure.

When the camera unit equipped with the lens module 100 according to this embodiment is in a shooting state, the lens unit 300 can be shifted relative to the central axis 200 by moving the lens holding member 2 in a plane perpendicular to the optical axis using an anti-vibration actuator of an anti-vibration mechanism consisting of an anti-vibration coil 3 and an anti-vibration magnet 4 according to the direction and magnitude of the vibration applied to the lens module 100, thereby suppressing image blur of the subject image on the imaging surface.

The angular velocity of movement is detected by a gyro sensor (not shown) built into the mobile terminal 500, and the angular velocity of the shake is integrated over time to obtain the angle of movement. The amount of movement of the image on the imaging surface is calculated from the angle of movement, and the amount of drive of the lens holding member 2 to cancel this image shake is also calculated. Then, based on this calculated value, the current supply to the vibration-proof coils 3a and 3b is controlled.

Next, the operation of the aperture device will be explained using the diagrams. In this embodiment, the lens module 100 comprises an aperture actuator made up of three aperture coils 7, a drive lever 5, and an aperture magnet 6. The aperture coil 7 is energized and excited to generate an attractive force and a repulsive force between it and the magnet 6, thereby operating the drive lever 5.

As shown in FIG. 7(a), when electricity is applied to the left-side aperture coil 7a and an attractive force is generated between the left-side aperture coil 7a and the aperture magnet 6, the magnet 6 and the drive lever 5 move to a position where they face-to-face with the left-side coil 7a.

As shown in FIG. 7(b), when electricity is applied to the central diaphragm coil 7b and an attractive force is generated between the diaphragm coil 7b and the magnet 6, the magnet 6 and the drive lever 5 move to a position where they face each other opposite the central coil 7b.

As shown in FIG. 7(d), when electricity is applied to the right-side aperture coil 7 and an attractive force is generated between the right-side aperture coil 7 and the aperture magnet 6, the magnet 6 and the drive lever 5 move to a position where they face-to-face with the right-side coil 7c.

Furthermore, as shown in FIG. 7(c), when electricity is applied to the center and right-side aperture coils 7 and an attractive force is generated between the aperture magnet 6, the magnet 6 and drive lever 5 move to a position between the center and right-side coils 7b and 7c and stop there. Furthermore, by changing the balance of the voltages in the two coils 7b and 7c, the magnet 6 and drive lever 5 can be moved to any position facing the two coils 7b and 7c. The same applies to coils 7a and 7b.

In this way, by controlling the current supply to the three aperture coils 7 as a driving source that generates a driving force to rotate the drive ring 8, the magnet 6 and drive lever 5 can move linearly and can be stopped at any position within the operating range. This allows the aperture to be changed to obtain the desired aperture area by controlling the current supply to a predetermined amount that is set in advance in correspondence with the aperture diameter (aperture value) and moving the drive lever 5 to the desired position.

The coil 7 may be energized by passing a current in the opposite direction to the attraction direction as described above to generate a magnetic field that repels the magnet 6. By combining attraction and repulsion, the magnet 6 and the drive lever 5 can be rapidly accelerated and decelerated, allowing the aperture device to operate at high speed. The amount of electricity passed through the coil 7 and other coils is controlled by a control device (such as a CPU) of the mobile terminal 500 in which the lens module 100 is mounted. Control of the amount of electricity passed through the coils 7 and other coils includes controlling which of the three aperture coils 7 to pass electricity through and how much current is supplied to each of them.

When the drive lever 5 moves in a straight line in this manner, the drive ring 8 rotates in the circumferential direction of the central axis 200 relative to the lens holding member 2 via the connection portion 8c between the drive shaft 5a of the drive lever 5 and the drive ring 8. The drive ring 8 transmits the driving force from the drive lever 5 to the six aperture blades 9 via the drive pin 8b. As a result, each aperture blade 9 rotates around the blade rotation shaft 2a as the drive pin 8b of the drive ring 8 moves along the cam groove 9c of the aperture blade.

Figure 8 shows a top view of the lens module 100. Figure 8(a) shows a state in which the aperture blade 9 opens the light passage opening of the lens module 100, Figure 8(b) shows a state in which the aperture blade 9 narrows the light passage opening of the lens module 100, and Figure 8(c) shows a state in which the aperture blade 9 narrows the light passage opening of the lens module 100 further than in Figure 8(b). By controlling the stop position of the drive lever 5, the rotation position of the drive ring 8 can be controlled, and the rotation position of the multiple aperture blades 9, that is, the size (diameter) of the aperture formed by the light blocking portions 9a of the multiple aperture blades 9, is controlled. By adjusting the aperture diameter, the amount of light passing through the lens module 100 can be adjusted.

Next, the operation of the vibration isolation mechanism when the aperture mechanism is in the small aperture state will be explained using Figure 9.

Figure 9(a) shows the state where the aperture mechanism is in a small aperture state and the lens unit 300 is located at a reference position where the central axis of the lens module 100 and the central axis of the lens unit 300 are aligned. In other words, it shows a state where the vibration isolation mechanism is not in operation. Figure 9(b) shows a state where the aperture value of the aperture mechanism is the same as in Figure 9(a), the vibration isolation mechanism is operating, and the center of the lens unit 300 is shifted to the left of the figure with respect to the central axis of the lens module 100. Figure 9(c) shows an enlarged view of the periphery of the drive lever 5 in Figure 9(b).

The dashed lines in Figures 9(b) and (c) indicate the positions of the drive lever 5 and the drive ring connection part 8c in the state of Figure 9(a). The difference between the position of the drive lever 5 in the state of Figure 9(a) and the position of the drive lever 5 in the states of Figures 9(b) and (c) is shown as the lever correction amount d.

As shown by the dashed line in Figure 9, when the vibration isolation mechanism moves the lens unit 300 in the operating direction of the drive lever, the drive lever 5 and drive ring connection part 8c must also move by the amount of movement of the vibration isolation mechanism compared to when it is not in operation. Note that the amount of movement of the vibration isolation mechanism is calculated from the angular velocity of movement of the gyro sensor built into the mobile terminal 500 as described above, and from this the required amount of movement of the drive lever 5 and drive ring connection part 8c, i.e. the lever correction amount d, can be calculated.

As mentioned above, by controlling the current supply to the three throttling coils 7a, 7b, and 7c, the magnet 6 and the drive lever 5 can move linearly and can be stopped at any position within the operating range. This also makes it possible to move the drive lever 5 from the position shown by the dashed line in Figures 9(b) and (c) to the position shown by the solid line.

Therefore, when the lens unit 300 is being moved by the anti-vibration mechanism, compared to when the lens unit 300 is not being moved by the anti-vibration mechanism, the position of the drive lever 5 is moved relative to the base member 1 based on the lever correction amount d so that the relative position to the lens holding member 2 does not change, and the diameter of the aperture can be kept constant regardless of whether the anti-vibration mechanism is operating or not.

By performing this type of control when the vibration isolation mechanism is in operation, the desired aperture opening can be formed, and the amount of light passing through the lens module can be precisely adjusted.

In this embodiment, the position of the drive lever 5 is corrected based on the lever correction amount d only when the anti-vibration mechanism moves the lens unit 300 in the operating direction of the drive lever 5, but this is not limited to the above. For example, when the anti-vibration mechanism moves the lens unit 300 in a direction perpendicular to the operating direction of the drive lever 5, there is no significant change in the magnetic field exerted by the aperture coil 7 before and after the drive lever 5 moves, so the aperture opening does not change significantly, but the lever correction amount d may be calculated taking this slight change into account.

As described above, in the lens module 100 according to this embodiment, when an aperture mechanism is provided for light passing through the lens unit 300 configured to be movable in a direction perpendicular to the optical axis by the vibration isolation mechanism, the drive source (aperture coil 7) that generates the driving force to move the aperture blades is fixed and attached to a part (base member 1) that does not move when the lens unit 300 moves in a direction perpendicular to the optical axis. With this configuration, even when an aperture mechanism is provided in the lens module 100 having a vibration isolation mechanism, the influence of the weight of the drive source on the vibration isolation operation can be reduced, and the influence of the drive source on the wiring due to the drive source being attached to a member that moves in a direction perpendicular to the optical axis during the vibration isolation operation can be reduced. Furthermore, in this embodiment, the amount of light passing through the lens module 100 can be accurately adjusted by correcting the amount of movement of the drive lever 5 that transmits the driving force that drives the aperture blades 9 in accordance with the movement of the lens unit 300 by the vibration isolation mechanism.

100 Lens module 200 Central axis 300 Lens unit 500 Portable terminal 1 Base member 1a Space 1b Light passage opening 1c Anti-vibration coil mounting portion 1d Anti-vibration coil mounting portion 1e Aperture coil mounting portion 1f Focus coil mounting portion 2 Lens holding member 2a Blade rotation shaft 2b Radial support convex portion 2c Thrust receiving surface 3 Anti-vibration coil 4 Anti-vibration magnet 5 Drive lever 5a Drive shaft 6 Aperture magnet 7 Aperture coil 8 Drive ring 8a Opening 8b Blade drive shaft 8c Connection portion 9 Aperture blade 9a Light shielding portion 9b Rotation shaft hole 9c Cam groove 10 Blade holding member 10a Opening 11 Lens cover 12 Base cover 13 Lens holding member 13a Blade rotation hole 13b Radial support convex portion 13c Thrust receiving surface 14 Drive ring 14a Opening 14b Cam groove 14c Connection 15 Aperture blade 15a Light blocking portion 15b Rotation shaft 15c Drive shaft 16 Focus coil 17 Focus magnet 18 Focus base member 18a Space 18b Light passage opening d Lever correction amount

Claims (6)

A base member having a light passage opening through which light passes;
a plurality of aperture blades arranged annularly around the light passing opening so that the front and back of the aperture blades overlap each other and move forward and backward into the light passing opening to form an aperture;
a drive ring that rotates around the light passing opening to transmit a drive force to the diaphragm blades;
a lens holding member that holds a lens through which the light passes and is movable relative to the base member from a reference position in a direction perpendicular to an optical axis of the light;
a drive lever having an engagement portion that engages with the drive ring and a first magnet;
a drive source having a first coil facing the first magnet and generating a drive force for rotating the drive ring;
the plurality of aperture blades and the drive ring are directly attached to the movable lens holding member;
A predetermined amount of current is applied to the first coil to move the first magnet to a desired position, thereby changing the aperture area to a desired aperture area ;
A light amount adjusting device characterized in that, when current is applied to the first coil to move the drive lever, the amount of movement of the drive lever is corrected depending on the amount of movement of the lens holding member from the reference position in the perpendicular direction . 2. The light amount adjusting device according to claim 1 , wherein the relative position of the drive lever with respect to the lens holding member does not change when the lens holding member is moved in the perpendicular direction. the lens holding member has a rectangular parallelepiped shape, and the driving lever is attached to the lens holding member;
3. The light amount adjusting device according to claim 1, wherein the first coil is disposed on a first side surface of the base member that is parallel to the optical axis. a second coil and a third coil provided on two surfaces of the base member, the second side surface and the third side surface being parallel to the optical axis and different from the first side surface and adjacent to each other;
a second magnet provided on the lens holding member and facing the second coil;
a third magnet provided on the lens holding member and facing the third coil;
4. The light amount adjusting device according to claim 3 , wherein the lens holding member is movable in the orthogonal direction by energizing the second coil or the third coil. a fourth coil provided on a fourth side surface of the base member that is parallel to the optical axis and different from any of the first side surface, the second side surface, and the third side surface;
a fourth magnet provided on the lens holding member and facing the fourth coil;
Equipped with
5. The light amount adjusting device according to claim 4 , wherein an autofocus operation is possible by energizing the fourth coil and moving the lens holding member in the direction of the optical axis of the light. A light amount adjusting device according to any one of claims 1 to 5 ,
A mobile terminal comprising: a first coil; a first coil arranged to supply a current to the first coil; a second coil arranged to supply a current to the first coil;

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