KR100746714B1 - Small camera device for communication machine - Google Patents

Abstract

The present invention relates to a compact camera device for an information and communication device that has reduced the size of the camera and implements zooming and autofocusing functions.

The present invention provides an image sensor fixed to the casing, a fixed lens unit fixed to the casing and fixed to the casing, a first movable lens unit, a fixed lens unit flowing in the optical axis direction between the fixed lens unit and the image sensor; A second movable lens unit which contacts the image of the subject with the first movable lens unit and flows in the optical axis direction, guide means fixed to the casing to guide the first movable lens unit and the second movable lens unit in the optical axis direction, and a fixed lens A magnet fixed to a part or a case and having a polarity divided in a direction perpendicular to the optical axis, a first coil fixed to the first movable lens part and wound to be driven in the optical axis direction by a magnetic flux generated from the magnet when a current is applied 2 The second coil fixed to the movable lens part and wound to be driven in the optical axis direction by the magnetic flux generated from the magnet when a current is applied. The adjusting the amount and direction of current applied to the first coil and the second coil, and has a control unit for controlling the image sensor. Therefore, not only the size reduction but also the excellent autofocusing function improves the clarity and the zoom function is realized.

       Information and communication devices, cameras, zoom

Description

Small camera device for information and communication equipment {Small camera device for communication machine}

1 is an exploded perspective view showing a camera device implemented according to an embodiment of the present invention;

2 is a perspective view of the combination of the camera device shown in FIG.

3 is a schematic view for explaining the principle of driving the camera device shown in FIG.

4 is a cross-sectional view of the camera device shown in FIG. 2;

FIG. 5 is a sectional view showing that the camera device shown in FIG. 2 is driven;

FIG. 5 is a sectional view showing that the camera device shown in FIG. 2 is driven.

<Description of Symbols for Main Parts of Drawings>

100: casing 200: image sensor

300: fixed lens unit 310: lens module group

320: lens guide 330: guide ball

340: fixing projection 400: the first movable lens unit

410: lens module group 420: lens guide

430: guide hole 500: second movable lens portion

510: Lens module group 520: Lens guide

530: guide hole 600: guide shaft

700: magnet 800: first coil

810: second coil 900: control unit

910: compression spring 920: first yoke

921: second yoke 930: panel spring

940: noise pad

The present invention relates to a small camera device for an information and communication device, and more particularly, by using a magnetic force generated between a coil and a magnet to which the power is applied to allow the lens module group to flow, thereby reducing the size of the camera while zooming and autofocusing functions. It relates to a small camera device for an information communication device having a.

In recent years, mobile phones equipped with small cameras have been widely used to image various shapes without difficulty in everyday life, and users have a desire to own high quality photographs and high performance small cameras. .

In addition, a small camera is mounted on various information communication devices such as a digital camera, a PDA, a computer, etc. as well as the mobile phone to realize a desired function, and most of the information communication devices are manufactured in a reduction-oriented manner. Likewise, a camera has been adopted to fix a lens because of a technical problem of miniaturization.

Therefore, the user can not adjust the focal length arbitrarily, it is possible to shoot the subject only within a certain shooting distance by the fixed magnification set when making a small camera, sharply falling the sharpness of the output image when shooting outside the set shooting distance There was this.

In order to compensate for the above problem, it is also possible to digitize and enlarge the image captured by the image sensor in a firmware manner, but it is difficult to improve the image quality enough to satisfy the needs of the user.

Accordingly, an object of the present invention is to solve the above problems, and the optical zoom function that allows long distance shooting while miniaturizing the camera device by flowing the lens module group by the magnetic force generated between the coil and the magnet when the power is applied and The present invention provides a compact camera device for an information communication device having an autofocusing function for finely adjusting the focus to improve sharpness.

Technical means of the present invention for achieving the above object is fixed to the casing is an image sensor to capture the image of the subject, the fixed lens unit is fixed to the casing is fixed to the casing is spaced apart from the image sensor, the fixed lens unit and the image A first movable lens portion flowing in the optical axis direction between the sensor, a second movable lens portion flowing in the optical axis direction between the fixed lens portion and the subject, the first movable lens portion and the third fixed to the casing 2, a guide means for guiding the movable lens unit to flow in the optical axis direction, a magnet fixed to the fixed lens unit or the case, and having a polarity divided in a direction perpendicular to the optical axis, and fixed to the first movable lens unit, when a current is applied. The first coil is wound to be driven in the optical axis direction by the magnetic flux generated by the magnet, and is fixed to the second movable lens unit. The controller controls the image sensor to adjust the amount and direction of the second coil and the current applied to the first coil and the second coil, which are wound to be driven in the optical axis direction by the magnetic flux generated by the magnet when a current is applied. It characterized by including.

       It further comprises a yoke for guiding the magnetic flux generated in the magnet to the first coil and the second coil and returning the magnetic flux passing through the coil back to the magnet.

The first coil and the second coil are fixed to the optical axis surface of the casing and connected to one side of the first movable lens unit and the second movable lens unit so as to be electrically connected to each other so as not to deviate from the optical axis array formed by the image sensor. It further comprises a panel spring for supplying power to the coil.

And restoring means for applying a predetermined force to move the first movable lens unit and the second movable lens unit to an initial position.

The restoring means may include a compression spring that is supported by the fixed lens unit or the case and applies an elastic force to the first movable lens unit.

The fixed lens unit may include a lens module group including a plurality of lenses arranged in an optical axis and a lens guide fixed to the casing in combination with the lens module group.

The magnet is attached to the lens guide is fixed.

The magnets are characterized in that the polarities of the faces facing each other toward the optical axis are arranged equally.

The first movable lens unit includes a lens module group consisting of a plurality of lenses arranged in an optical axis and a lens guide coupled to the lens module group and flowing along the guide means.

The second movable lens unit may include a lens module group including a plurality of lenses arranged in an optical axis and a lens guide coupled to the lens module group and flowing along the guide means.

The guide means is characterized in that it comprises a guide shaft for guiding flow in the optical axis direction in combination with the guide hole provided at a predetermined position of the fixed lens unit, the first movable lens unit and the second movable lens unit.

The control unit adjusts an optical zoom of an image captured by the image sensor by applying a current to drive one or more of the first coil and the second coil, respectively, and adjusting a driving width. By finely adjusting the driving width by applying current to drive one or more of the second coils, the image captured by the image sensor is sharply adjusted.

The control unit applies a weak current to the first coil to finely move the first movable lens unit to sharpen the focus of an image captured by the image sensor through the fixed lens unit and the second movable lens unit on the same optical axis. It is characterized in that the adjustment.

The control unit may apply a strong current to the second coil to move the second movable lens unit to a large width so as to pass through the fixed lens unit and the first movable lens unit on the same optical axis and to be imaged by the image sensor. It is characterized by performing a zoom.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a camera device for information communication apparatus according to the present invention will be described in detail.

1 is an exploded perspective view of a camera apparatus according to an embodiment of the present invention, Figure 2 is a combined perspective view of FIG.

As shown, the compact camera device of the present embodiment is fixed to the casing 100 by a fixed distance from the image sensor 200 and the image sensor 200 fixed to the casing 100 and fixed to the casing 100 and The first movable lens 400 and the second fixed lens 300 which contact the image of the subject and flow in the optical axis direction are moved between the fixed lens unit 300 and the image sensor 200 in the optical axis direction. The polarity is fixed to the movable lens unit 500, the guide means for guiding the first movable lens unit 400 and the second movable lens unit 500 and the fixed lens unit 300 and perpendicular to the optical axis. The first coil 800 and the first coil 800 which are fixed to the divided magnet 700 and the first movable lens unit 400 and are driven to be driven in the optical axis direction under the influence of the magnetic flux generated by the magnet 700. 2 is fixed to the movable lens unit 500, when the current is applied to the magnet 700 The second coil 810 wound to be driven in the optical axis direction under the influence of the generated magnetic flux, and the control unit 900 for adjusting the amount and direction of the current applied to the first coil 800 and the second coil 810. .

In addition to the configuration of the present invention, yoke 920 and 921 for concentrating the magnetic flux generated in the magnet 700 to the first coil 800 and the second coil 810 is further provided, the casing 100 and And a panel spring 930 connected to the first movable lens unit 400 and the second movable lens unit 500 to be elastically restored and to supply power to the first coil 800 and the second coil 810. It is desirable to.

Here, the compact camera according to the present invention overcomes the limitations of the mechanical structure in which various components are required by using the magnetic force generated between the magnet 700 and the flow lens units 400 and 500 to implement the zoom and autofocusing functions. The camera is miniaturized and can be used for information communication devices such as mobile phones, PDAs, digital cameras, and video computers.

The fixed lens unit 300 includes a lens module group 310 having a plurality of lenses arranged in an optical axis, and a lens guide 320 coupled to the lens module group 310 and fixed to the casing 100.

The lens guide 320 is provided with a guide hole 330 to be inserted into the guide means, it is preferable that a fixing protrusion 340 is fixed to the casing 100 in combination with the fixing groove designed in the mold.

The first movable lens unit 400 is coupled to the lens module group 410 and the lens module group 410 which are composed of a plurality of lenses whose optical axes are aligned with the image sensor 200 and the fixed lens unit 300. It consists of a lens guide 420 flowing along.

The lens guide 420 of the first movable lens unit 400 has a guide hole 440 for flowing in the optical axis direction, is inserted into the guide means, and the image sensor 200 and the fixed lens unit 300 are constructed. Does not deviate from the optical axis array.

As shown, the magnet 700 is divided in the polarity perpendicular to the optical axis to form a series of magnetic fields consisting of the N pole inside and the S pole outside.

Further, it is also possible to form a series of magnetic fields in which the inside of the S pole and the outside of the N pole are perpendicular to the optical axis so that the direction of the magnetic force line is different from the above.

The first coil 800 is inserted into and fixed to the first movable lens unit 400 and is wound to be driven in the optical axis direction due to the magnetic flux generated by the magnet 700 when a control current is applied.

As such, the driving force using the magnet 700 and the first coil 800 finely adjusts the current applied to the first coil 800, thereby delicately shifting the driving width so as to display an image projected on the image sensor 200. By focusing it is possible to realize a clearer image.

The second movable lens unit 500 is composed of a plurality of lenses whose optical axes are aligned with the image sensor 200, the fixed lens unit 300, and the first movable lens unit 400. The lens guide 520 is coupled to the lens module group 510 and flows along the guide means.

The lens guide 420 of the second movable lens unit 500 has a guide hole 440 for flowing in the optical axis direction and is inserted into the guide means, and the image sensor 200 and the fixed lens unit 300 are constructed. Does not deviate from the optical axis array.

The second coil 810 is inserted into and fixed to the second movable lens unit 500 and is wound to be driven in the optical axis direction due to the magnetic flux generated by the magnet 700 when a control current is applied.

In addition, the second movable lens unit 500 is the lens module group 510 is set to a magnification that can be photographed at a long distance, the larger image sensor is driven to be controlled by the large amount of current applied to the second coil 810. Optical zoom is performed on the image projected at 200.

The guide means is coupled to the guide holes 330, 440, 540 provided at predetermined positions of the fixed lens unit 300, the first movable lens unit 400, and the second movable lens unit 500 to guide the flow in the optical axis direction. It consists of 600.

The guide shaft 600 is just one embodiment of flow guides the movable lens units 400 and 500 to implement the zoom and focusing functions, and the concept of various guide means corresponding thereto is obvious from the viewpoint of those skilled in the art. to be.

The controller 900 measures the amount and direction of the current applied to the coils 800 and 810 of the image sensor 200, the first movable lens unit 400, and the second movable lens unit 500, thereby providing a casing 100. ) Or is provided separately from the casing 100 by wire and wireless.

The housing of the control unit 900 has an on and off button for driving the image sensor 200 and a low magnification photographing button for controlling a current applied to the coil 810 in the second movable lens unit 500 to execute optical zoom. And a high magnification photographing button.

As described above, when the control unit 900 detects that the optical zoom is executed and there is a focusing error in the image image projected by the image sensor 200, a fine control current is applied to the coil in the first movable lens unit 400. The focusing error generated is corrected.

In the present embodiment, the first coil 800 of the first movable lens unit 400 flows to implement the autofocusing function, and the second coil 810 of the second movable lens unit 500 for the zoom function. The camera device is implemented by dividing it into a fluid. However, it is also possible to configure the lens magnification or driving width of the first movable lens unit 400 to be suitable for remote shooting and to finely drive the second movable lens unit 500 to perform a focusing function.

In addition, the lens module of the fixed lens unit 300 and the first movable lens unit 400 and the second movable lens unit 500 are set to allow long distance shooting, and the first movable lens unit 400 and Each of the coils 800 and 810 of the second movable lens unit 500 may be configured not only to move with a driving width for zooming, but also to move with a focusing function.

The yokes 920 and 921 concentrate and circulate the magnetic flux generated from the magnet 700 to the first coil 800 and the second coil 810, and apply them to the first coil 800 and the second coil 810. The magnetic field generated by the control current is also provided to concentrate in conjunction with the magnet 700, it is made of a shape in which the driving force of the maximum efficiency is generated.

In the present invention, the shape of the yoke 920 and 921 is a yoke 920 and the magnet 700 and the first coil 800 surrounding the inner diameter of the magnet 700 and the first coil 800 and the second coil 810. ) And the yoke 921 surrounding the outer circumferential surface of the second coil 810, the magnetic flux of the magnet 700 is concentrated on the first coil 800 and the second coil 810.

The panel spring 930 is respectively connected to the optical axis of the casing 100 and the first movable lens unit 400 and the second movable lens unit 500 so that the power is conducted. Due to the flow of the two coils 810, the first movable lens unit 400 and the second movable lens unit 500 are supported to be driven.

The control power is applied to the camera device through the panel-type spring 930, when the wire or flexible PC is directly connected to the first coil 800 and the second coil 810, the first coil 800 And due to the movement of the second coil 810 there is a possibility that the power is short-circuited due to the frequent flow of the wire or flexible PC.

In addition, due to the characteristics of the camera device to be finely moved to adjust the focus, connecting the wire or flexible PC directly to the first coil 800 and the second coil 810 to drive acts as an obstacle to the driving force.

The first movable lens unit 400 and the second movable lens unit 500 flow with the driving force generated by the first coil 800, the second coil 810, and the magnet 700, and then move to the general shooting position. It is preferable that a predetermined restoration means is further provided.

The restoring means is supported by the lens guide 320 of the fixed lens unit 300, and consists of a compression spring 550 for applying an elastic force to the first movable lens unit 400 and the second movable lens unit 500, the compression spring The noise pad 560 is attached to the outer circumference of the guide hole of the fixed lens unit 300 to remove the noise generated while the 550 is not fixed, and the compression spring 550 is covered.

The camera device of the present embodiment is different from a large zoom camera device that performs magnification adjustment using a complicated gear device, and the movable lens parts 400 and 500 are driven by electromagnetic force generated between the magnet 700 and the coils 800 and 810. Move to adjust magnification. Therefore, the corrugation of the camera apparatus of the present embodiment can be reduced in size and can be applied to small information communication devices such as mobile phones.

Hereinafter, the operation of the camera device having the configuration as described above will be described.

Figure 3 is a schematic diagram for explaining the principle of driving the camera device in one embodiment of the present invention.

As shown, the magnets 700 are symmetrically disposed facing the north pole toward the optical axis, starting at the north pole and guided by yokes 920 and 921 to guide the first coil 800 and the second. A magnetic field is formed that passes through the coil 810 and returns to the S pole.

In this embodiment, since the polarity of the magnet 700 facing the optical axis is the N pole, the magnetic flux penetrates from the inside of the coil to the outside and is generated according to the direction of the current applied to the first coil 800 and the second coil 810. The electromagnetic force is driven toward the magnet 700 or moved away from the magnet 700.

4 is a cross-sectional view showing a magnet 700 in an embodiment of the present invention, Figures 5 and 6 are sectional views showing the operation of the camera apparatus according to the present invention.

As shown in the dotted line of FIG. 5, the magnet 700 is divided into the north pole and the south pole perpendicular to the optical axis, so that the magnetic flux from the north pole to the south pole is mainly in the optical axis flow direction of the first coil 800. When the current is applied so as to penetrate vertically and the upper portion of the first coil 800 to the N pole, the first movable in which the first coil 800 is fixed in a direction approaching the magnet 700 according to the Fleming left hand law. The lens unit 400 flows.

In addition, when the magnetic flux of the magnet 700 is applied perpendicularly to the optical axis flow direction of the second coil 810, and a current is applied so that the upper side of the second coil 810 becomes the N pole, the magnet according to the Fleming left hand law. The second movable lens unit 500 in which the second coil 810 is fixed moves in a direction away from the 700.

Similarly, as shown in the dotted line of FIG. 6, when the magnetic flux is applied perpendicularly to the optical axis flow direction of the first coil 800 and penetrates, and a current is applied so that the lower side of the first coil 800 becomes the N pole. According to the Fleming left hand law, the first movable lens unit 400 in which the first coil 800 is fixed moves in a direction away from the magnet 700.

In addition, the magnetic flux of the magnet 700 fixed to the fixed lens unit 300 is applied perpendicularly to the optical axis induction direction of the second coil 810 to penetrate therethrough, so that the current below the second coil 810 becomes the N pole. When is applied, the second movable lens unit 500 to which the second coil 810 is fixed flows in a direction approaching the magnet 700 according to Fleming's left-hand law.

In this manner, the control unit detects and corrects a focusing error by a current controlled by the first movable lens unit 400 to be finely controlled, and is the same as the method in which the first movable lens unit 400 flows but the second Optical zoom is performed by increasing the intensity of the voltage applied to the second coil 810 of the movable lens unit 500 to increase the moving width.

In addition, the camera apparatus according to the present invention is set to take a general shooting with a low magnification, which is commonly used by a user, similarly to a conventional fixed magnification camera apparatus.

Accordingly, a user manipulates a keypad (not shown) of the controller 900 to pass an image of a subject through the first movable lens unit 400, the fixed lens unit 300, and the second movable lens unit 500 in which the optical axes are arranged. Information projected by the image sensor 200 is transmitted to the control unit 900 to be stored in a memory (not shown) or output to a display screen (not shown).

In addition, if the user wants to photograph the subject at a long distance at high magnification, the second movable lens unit 500 is driven using the high magnification photographing button in the controller 900 to flow in the optical axis direction spaced apart from the image sensor 200. The optical zoom adjusted image is projected on the image sensor 200 while the user desires the magnification.

The projected image is transmitted to the control unit 900 through a wire or flexible PC and stored in a memory (not shown) or output to a display screen (not shown).

When the control unit 900, which receives the projected image image by adjusting the optical zoom, detects a focusing error that is poor in focus and detects a lack of sharpness, a minute current is automatically applied to the coil in the first movable lens unit 400. The focusing error is set to correct the focusing error, and the user may manually adjust the focusing error by manually operating a keypad (not shown) of the controller 900.

In the high magnification photographing, the current applied to the first movable lens unit 400 and the second movable lens unit 500 is continuously supplied to maintain the set magnification.

Therefore, when the user finishes shooting and the power is turned off, the current applied to the coils 800 and 810 of the first movable lens unit 400 and the second movable lens unit 500 is cut off, and the coils 800 and 810 Since the magnetic force formed by the magnet 700 is dissipated, it is automatically moved to the general shooting position of low magnification due to the restoring means having elastic force, such as the compression spring 910.

In addition, when a high magnification photographing button and a low magnification photographing button of the control unit 900 are used in combination, a control power is applied to the movable lens units 400 and 500 and the magnification is set. The above process of setting the low magnification is repeated.

While specific embodiments of the present invention have been described and illustrated above, it will be apparent that the present invention may be embodied in various modifications by those skilled in the art. Such modified embodiments should not be understood individually from the technical spirit or the prospect of the present invention, but should fall within the claims appended to the present invention.

Therefore, in the present invention, the lens module group is made to flow by the electromagnetic force generated between the coil and the magnet when the power is applied, while miniaturizing the camera device, and the optical zoom function capable of long distance shooting and the fine focusing control to increase the sharpness to increase the sharpness There is an advantage that the function can be implemented well.

Claims (14)

delete delete An image sensor fixed to the casing to capture an image of the subject; A fixed lens unit spaced apart from the image sensor and fixed to the casing; A first movable lens unit flowing in the optical axis direction between the fixed lens unit and the image sensor; A second movable lens unit flowing in the optical axis direction between the fixed lens unit and the subject; Guide means fixed to the casing to guide the first movable lens portion and the second movable lens portion to flow in an optical axis direction; A magnet fixed to the fixed lens part or the case and having polarity divided in a direction perpendicular to the optical axis; A first coil fixed to the first movable lens unit and wound to be driven in an optical axis direction by a magnetic flux generated from the magnet when a current is applied; A second coil fixed to the second movable lens unit and wound to be driven in an optical axis direction by a magnetic flux generated from the magnet when a current is applied; And Control unit for controlling the amount and direction of the current applied to the first coil and the second coil, the image sensor; The first coil and the second coil are fixed to the optical axis surface of the casing and connected to one side of the first movable lens unit and the second movable lens unit so as to be electrically connected to each other so as not to deviate from the optical axis array formed by the image sensor. Small camera device for an information and communication device further comprises a panel-type spring for supplying power to the coil. The method according to claim 3, And a restoring means for applying a predetermined force to move the first movable lens unit and the second movable lens unit to an initial position. The method according to claim 4, The restoring means is a compact camera device for an information and communication device, characterized in that the compression spring is supported by a fixed lens unit or a case to apply an elastic force to the first movable lens unit. An image sensor fixed to the casing to capture an image of the subject; A fixed lens unit spaced apart from the image sensor and fixed to the casing; A first movable lens unit flowing in the optical axis direction between the fixed lens unit and the image sensor; A second movable lens unit flowing in the optical axis direction between the fixed lens unit and the subject; Guide means fixed to the casing to guide the first movable lens portion and the second movable lens portion to flow in an optical axis direction; A magnet fixed to the fixed lens part or the case and having polarity divided in a direction perpendicular to the optical axis; A first coil fixed to the first movable lens unit and wound to be driven in an optical axis direction by a magnetic flux generated from the magnet when a current is applied; A second coil fixed to the second movable lens unit and wound to be driven in an optical axis direction by a magnetic flux generated from the magnet when a current is applied; And Control unit for controlling the amount and direction of the current applied to the first coil and the second coil, the image sensor; The fixed lens unit, the lens module group consisting of a plurality of lenses arranged in the optical axis; And a lens guide fixed to the casing by being coupled to the lens module group. The method according to claim 6, The small camera device for an information and communication device, characterized in that the magnet is attached and fixed to the lens guide. delete An image sensor fixed to the casing to capture an image of the subject; A fixed lens unit spaced apart from the image sensor and fixed to the casing; A first movable lens unit flowing in the optical axis direction between the fixed lens unit and the image sensor; A second movable lens unit flowing in the optical axis direction between the fixed lens unit and the subject; Guide means fixed to the casing to guide the first movable lens portion and the second movable lens portion to flow in an optical axis direction; A magnet fixed to the fixed lens part or the case and having polarity divided in a direction perpendicular to the optical axis; A first coil fixed to the first movable lens unit and wound to be driven in an optical axis direction by a magnetic flux generated from the magnet when a current is applied; A second coil fixed to the second movable lens unit and wound to be driven in an optical axis direction by a magnetic flux generated from the magnet when a current is applied; And Control unit for controlling the amount and direction of the current applied to the first coil and the second coil, the image sensor; The first movable lens unit comprises a lens module group consisting of a plurality of lenses arranged in an optical axis; And And a lens guide coupled to the lens module group and flowing along the guide means. An image sensor fixed to the casing to capture an image of the subject; A fixed lens unit spaced apart from the image sensor and fixed to the casing; A first movable lens unit flowing in the optical axis direction between the fixed lens unit and the image sensor; A second movable lens unit flowing in the optical axis direction between the fixed lens unit and the subject; Guide means fixed to the casing to guide the first movable lens portion and the second movable lens portion to flow in an optical axis direction; A magnet fixed to the fixed lens part or the case and having polarity divided in a direction perpendicular to the optical axis; A first coil fixed to the first movable lens unit and wound to be driven in an optical axis direction by a magnetic flux generated from the magnet when a current is applied; A second coil fixed to the second movable lens unit and wound to be driven in an optical axis direction by a magnetic flux generated from the magnet when a current is applied; And Control unit for controlling the amount and direction of the current applied to the first coil and the second coil, the image sensor; The second movable lens unit comprises a lens module group consisting of a plurality of lenses arranged in an optical axis; And A lens guide coupled to the lens module group and flowing along the guide means; Small camera device for an information and communication device comprising a. delete An image sensor fixed to the casing to capture an image of the subject; A fixed lens unit spaced apart from the image sensor and fixed to the casing; A first movable lens unit flowing in the optical axis direction between the fixed lens unit and the image sensor; A second movable lens unit flowing in the optical axis direction between the fixed lens unit and the subject; Guide means fixed to the casing to guide the first movable lens portion and the second movable lens portion to flow in an optical axis direction; A magnet fixed to the fixed lens part or the case and having polarity divided in a direction perpendicular to the optical axis; A first coil fixed to the first movable lens unit and wound to be driven in an optical axis direction by a magnetic flux generated from the magnet when a current is applied; A second coil fixed to the second movable lens unit and wound to be driven in an optical axis direction by a magnetic flux generated from the magnet when a current is applied; And Control unit for controlling the amount and direction of the current applied to the first coil and the second coil, the image sensor; The control unit adjusts an optical zoom of an image captured by the image sensor by applying a current to drive one or more of the first coil and the second coil, respectively, and adjusting a driving width. A small camera device for an information and communication device, characterized in that the image being captured by the image sensor is sharply adjusted by applying a current to each of the second coils to finely adjust the driving width. The method according to claim 12, The control unit applies a weak current to the first coil to finely move the first movable lens unit to sharpen the focus of an image captured by the image sensor through the fixed lens unit and the second movable lens unit on the same optical axis. Miniature camera device for information and communication equipment, characterized in that for adjusting to. The method according to claim 12, The control unit may apply a strong current to the second coil to move the second movable lens unit to a large width so as to pass through the fixed lens unit and the first movable lens unit on the same optical axis and to be imaged by the image sensor. A compact camera device for an information and communication device, characterized in that for performing a zoom.

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