KR100774543B1 - Apparatus for compensating vibration of digital camera - Google Patents

Abstract

The present invention relates to a device for compensating for vibration of a digital camera, and in particular, by mounting an elastic member to fix and support a stage so that the image sensor is normally in an initial position, thereby reducing power consumption required for moving the image sensor to an initial position. The present invention relates to a digital camera shake correction device capable of quickly recognizing an initial position in a control unit to improve a reaction speed and minimizing frictional force when moving a stage to move the stage with less energy.

Digital camera, image stabilizer, elastic member, leaf spring, wire spring, stage.

Description

Image stabilizer for digital cameras {APPARATUS FOR COMPENSATING VIBRATION OF DIGITAL CAMERA}

1 is an exploded perspective view of a shake compensation device according to a first embodiment of the present invention;

2 is a perspective view of a state in which the vibration correction device according to the first embodiment of the present invention is coupled;

3 is a cross-sectional view of the X axis of the vibration compensator according to the first embodiment of the present invention;

4 is a cross-sectional view of the Y axis of the vibration compensator according to the first embodiment of the present invention;

5 is an exploded perspective view of a shake correction device according to a second embodiment of the present invention;

6 is a perspective view of a state in which the vibration correction device according to the second embodiment of the present invention is combined;

7 is a cross-sectional view of the X axis of the vibration compensator according to the second embodiment of the present invention;

8 is a cross-sectional view of the Y axis of the vibration compensator according to the second embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

110: housing, 111: main body,

112: cover, 115: support member,

120: Y axis stage, 121: the first magnet,

122: first coil, 123: first yoke,

130: X axis stage, 131: second magnet,

132: second coil, 133: second yoke,

140: Y-axis elastic member, 150: X-axis elastic member,

160: image sensor, 210: housing,

211: main body, 212: cover,

220: stage, 221: first magnet,

222: first coil, 223: first yoke,

231: second magnet, 232: second coil,

233: second yoke, 240: wire spring,

250: Image sensor.

The present invention relates to a device for compensating for vibration of a digital camera, and in particular, by mounting an elastic member to fix and support a stage so that the image sensor is normally in an initial position, thereby reducing power consumption required for moving the image sensor to an initial position. The present invention relates to a digital camera shake correction device capable of quickly recognizing an initial position in a control unit to improve a reaction speed and minimizing frictional force when moving a stage to move the stage with less energy.

Applicant of the present invention has applied for the Republic of Korea Patent Application No. 10-2005-122667 (vibration correction device of the imaging device).

The present invention is installed so that the image sensor can move freely in the X, Y axis direction from the fixed portion, and when the vibration due to hand shake, etc. is transmitted to the camera to move the image sensor in the direction to correct the vibration to correct the amount of vibration caused by hand shake It is.

Such a device enables the digital camera to be lighter in size by maintaining the resolution of the digital camera's image quality and reducing power consumption.

However, such a camera is placed in a state in which the image sensor can move freely in the X and Y axis directions, so that the control unit applies a current to the driving unit before driving the camera to hold the image sensor at an initial position with driving force.

Therefore, unnecessary power was consumed, and the initial setting time of the camera was long.

In addition, by mounting and sliding along the X-axis shaft and the Y-axis shaft to move the X-axis stage and the Y-axis stage, there is a problem that a large amount of energy is required to generate a large friction force to move.

The present invention has been made to solve the above-described problems, by reducing the power consumption required to move the image sensor to the initial position in the initial position of the image at normal times, and quickly recognizes the initial position in the control unit to increase the reaction speed The present invention aims to provide a digital camera shake correction device capable of improving the movement of the stage by minimizing frictional force when the stage moves.

In order to achieve the above object, a shake correction device of a digital camera of the present invention comprises: a housing; A stage disposed inside the housing and mounted with an image sensor; A driving unit for driving the stage; A controller for detecting the vibration of the digital camera from the vibration sensor and controlling the driving unit to vibrate the image sensor in a direction to correct the vibration of the digital camera; It includes an elastic member for supporting the stage fixed to the housing.

The stage includes an X-axis stage provided to be movable in the X-axis direction, and a Y-axis stage provided to be movable in the Y-axis direction perpendicular to the X-axis stage in a plane. An X axis direction driving part for driving in the X axis direction, and a Y axis direction driving part for driving the Y axis stage in the Y axis direction, wherein the elastic member, Y axis for connecting and supporting the Y axis stage to the housing An elastic member and an X-axis elastic member for supporting the X-axis stage by connecting to the Y-axis stage.

The elastic member is made of a leaf spring, made of at least two or more so as to face each other.

At this time, the Y-axis elastic members are mounted to face each other in the Y-axis direction, and the X-axis elastic members are mounted to face each other in the X-axis direction.

A support member parallel to the stage and guiding movement of the stage is formed in a central portion of the housing, wherein the Y-axis stage is connected to the support member by the Y-axis elastic member under the support member, and the X The shaft stage is connected to the Y-axis stage by the X-axis elastic member at the upper portion of the support member.

At this time, the X-axis elastic member is made of a straight plate spring to connect the X-axis stage and the Y-axis stage, the Y-axis elastic member is made of a deflection type plate spring to connect the Y-axis stage and the support member .

In addition, the elastic member, one end is coupled to the housing and the other end is made of a wire spring coupled to the stage.

At this time, the wire spring is made up of at least three to support the stage.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

First embodiment

1 is an exploded perspective view of a shake correction device according to a first embodiment of the present invention, Figure 2 is a perspective view of a combined state of the shake correction device according to a first embodiment of the present invention, Figure 3 is a first view of the present invention 4 is a cross-sectional view of the X-axis of the vibration compensator according to the embodiment, and FIG.

As shown in FIGS. 1 to 4, the vibration compensator includes a housing 110, stages 120 and 130, a driving unit, a controller (not shown), an elastic member 150, 160, and the like.

The housing 110 is formed by combining the body 111 and the cover 112, the support member for parallel to the stage (120, 130) and guides the movement of the stage (120, 130) in the center of the housing (110) 115 is formed.

The stages 120 and 130 are disposed in the housing 110 and installed in the X-axis direction so as to be movable in the X-axis direction, and are movable in the Y-axis direction perpendicular to the X-axis stage 130 in a plane. The Y-axis stage 120 is installed, the X-axis stage 130 is mounted with an image sensor 160.

The driving unit drives the stages 120 and 130, an X-axis direction driving unit for driving the X-axis stage 130 in the X-axis direction, and a Y-axis driving the Y-axis stage 120 in the Y-axis direction. It consists of a direction driving part.

The Y-axis direction driving part is fixed to the first magnet 121 and the Y-axis stage 120 and is wound several times and disposed in the magnetic field region of the first magnet 121 when the current is supplied. The first coil 122 generates an electromagnetic force for receiving the magnetic flux of the first magnet 121 and drives the Y-axis stage 120 in the Y-axis direction, and the magnetic flux emitted from the first magnet 121 receives the first coil 122. The first yoke 123 is concentrated to return the magnetic flux passing through the first coil 122 to the first magnet 121.

The X-axis direction driver, the second magnet 131 is fixed to the housing 110, and fixed to the X-axis stage 130 and wound several times is disposed in the magnetic field region of the second magnet 131 when the current is supplied The second coil 132 generates an electromagnetic force that receives the magnetic flux of the second magnet 131 and drives the X-axis stage 130 in the X-axis direction, and the magnetic flux emitted from the second magnet 131 is converted into a second coil ( And a second yoke 133 for concentrating the magnetic flux past the second coil 132 to the second magnet 131.

The controller controls the driving unit to sense the vibration of the digital camera from a vibration sensor (not shown) and to vibrate the image sensor 160 in a direction to correct the vibration of the digital camera.

The elastic members 150 and 160 serve to fix the stages 120 and 130 to the housing 110.

The elastic members 150 and 160 may include a Y-axis elastic member 140 for supporting the Y-axis stage 120 by being connected to the housing 110, and an X-axis stage 130 on the Y-axis stage 120. It consists of an X-axis elastic member 150 to support the connection.

That is, the Y-axis stage 120 is connected to the support member 115 by the Y-axis elastic member 140 in the lower portion of the support member 115 formed in the center of the housing 110, the X The shaft stage 130 is connected to the Y-axis stage 120 by the X-axis elastic member 150 at the upper portion of the support member 115.

By fixing and supporting the stages 120 and 130 to the housing 110 by using the elastic members 150 and 160 as described above, the stages 120 and 130 may be always disposed at an initial position by the elastic force of the elastic members 150 and 160. In addition, since only the elastic members 150 and 160 support the stages 120 and 130, the friction force is hardly applied to move the stages 120 and 130, so that the stages 120 and 130 can be moved with little energy.

In this case, ribs are formed in the support member 115, the X-axis stage 130, and the Y-axis stage 120, so that the X-axis stage 130 and the Y-axis stage 120 support the support member 115. It can also be made to slide along.

The elastic members 150 and 160 may be formed of leaf springs, and are formed of at least two or more so as to face each other as shown in FIG. 1.

In detail, the Y-axis elastic members 140 are mounted to face each other in the Y-axis direction, and the X-axis elastic members 150 are mounted to face each other in the X-axis direction to have elastic restoring force in each direction. To do that.

At this time, the X-axis elastic member 150 is made of a linear leaf spring to connect the X-axis stage 130 and the Y-axis stage 120, the Y-axis elastic member 140 is a deflection plate spring It is made to connect the Y-axis stage 120 and the support member 115.

The X-axis elastic member 140 connecting the Y-axis stage 120 and the support member 115 to the X-axis elastic member 140 connecting the X-axis stage 130 and the Y-axis stage 120 ( Since the length of the Y-axis elastic member 140 and the X-axis elastic member 150 are the same, since the length is shorter than 150, the Y-axis elastic member 140 is less deformed and the Y-axis stage 120 is Y This is because relatively little movement in the axial direction and a lot of energy is required to move the Y-axis stage 120.

Therefore, the Y-axis elastic member 140 is made of a deflection type leaf spring, so that it can be deformed more than a straight leaf spring, the amount of movement of the Y-axis stage 120, the X-axis stage 130 The Y-axis stage 120 can be moved with little energy because the deformation amount of the Y-axis elastic member 140 is large.

Hereinafter, the operating state of the first embodiment consisting of the components as described above.

When the digital camera is turned off, the Y-axis stage 120 is in an initial position by receiving the elastic force of the Y-axis elastic member 140, and the X-axis stage 130 also has the elastic force of the X-axis elastic member 150. Is in the initial position.

Even if the digital camera vibrates, the Y-axis stage 120 and the X-axis stage 130 are always returned to their initial positions by the elastic force of the Y-axis elastic member 140 and the X-axis elastic member 150.

Therefore, the controller can quickly know the initial position of the image sensor 160.

On the other hand, when a separate vibration sensor detects the vibration of the digital camera and transmits it to the control unit, the control unit drives the Y-axis direction unit and the X-axis direction unit to drive the X-axis stage 130 and Y equipped with the image sensor 160 The shaft stage 120 is moved in a direction of correcting vibration of the digital camera to prevent shaking of an image captured by the image sensor 160.

In this process, first, when a current is applied to the first coil 122 from the control unit, the magnetic flux from the first magnet 121 passes through the first coil 122 and the Y-axis stage 120 is disposed on the first coil 122. ) To generate the electromagnetic force to move in the Y-axis direction.

By the electromagnetic force, the Y-axis stage 120 overcomes the elastic force of the Y-axis elastic member 140 and moves finely in the Y-axis direction to correct the vibration in the Y-axis direction against the Y-axis vibration of the digital camera device. To compensate for the tremors on the Y axis.

In this process, the first yoke 123 improves driving force by allowing the magnetic flux of the first magnet 121 to efficiently return to the first magnet 121 after passing through the first coil 122.

At the same time, when a current is applied to the second coil 132 from the controller, the magnetic flux from the second magnet 131 passes through the second coil 132 and the X-axis stage 130 is applied to the second coil 132. The electromagnetic force to move in the axial direction is generated.

By the electromagnetic force, the X-axis stage 130 moves slightly in the X-axis direction to overcome the elastic force of the X-axis elastic member 150, thereby correcting the vibration in the X-axis direction against the X-axis vibration of the digital camera device. To compensate for the vibration on the X axis.

In this process, the second yoke 133 improves driving force by allowing the magnetic flux of the second magnet 131 to efficiently return to the second magnet 131 after passing through the second coil 132.

In addition, the driving force of the Y-axis direction driving unit and the X-axis direction driving unit should be greater than the elastic resistance of the Y-axis elastic member 140 and the X-axis elastic member 150.

In this case, since the stages 120 and 130 are connected only by the elastic members 150 and 160, frictional forces hardly act during movement, thereby reducing energy required for the driving unit.

In this way, the image sensor 160 is driven in a direction for correcting the vibration of the digital camera, thereby compensating for the shaking of the image captured by the image sensor 160.

On the other hand, when the driving force applied to the Y-axis direction drive unit and the X-axis direction drive unit is removed, the Y-axis stage 120 and the X-axis stage 130 is the elastic force of the Y-axis elastic member 140 and the X-axis elastic member 150 Return to the initial position.

Second embodiment

5 is an exploded perspective view of the vibration compensator according to the second embodiment of the present invention, FIG. 6 is a perspective view of a combined state of the vibration compensator according to the second embodiment of the present invention, and FIG. FIG. 8 is a cross-sectional view of the shake compensation device according to the embodiment, and FIG.

5 to 8, the vibration compensator includes a housing 210, a stage 220, a driver, a controller (not shown), an elastic member, and the like.

The housing 210 is formed by combining the body 211 and the cover 212.

The stage 220 is disposed inside the housing 210 and the image sensor 250 is mounted. Unlike the first embodiment, the stage 220 includes only one stage 220.

The driving unit drives the stage 220, and includes an X axis direction driving unit for driving the stage 220 in the X axis direction, and a Y axis direction driving unit for driving in the Y axis direction.

The Y-axis driving part is fixed to the first magnet 221 fixed to the housing 210 and the Y-axis stage 220 and wound several times and disposed in the magnetic field region of the first magnet 221 when the current is supplied. The first coil 222 generates an electromagnetic force that receives the magnetic flux of the first magnet 221 to drive the Y-axis stage 220 in the Y-axis direction, and the magnetic flux emitted from the first magnet 221 receives the first coil 222. And a first yoke 223 for returning the magnetic flux passing through the first coil 222 to the first magnet 221.

The X-axis direction driver, the second magnet 231 is fixed to the housing 210, and fixed to the X-axis stage 220 and wound several times, disposed in the magnetic field region of the second magnet 231 when the current is supplied The second coil 232 for generating an electromagnetic force for driving the X-axis stage 220 in the X-axis direction by receiving the magnetic flux of the second magnet 231, and the magnetic flux from the second magnet 231 for the second coil 232. The second yoke 233 is concentrated to the second side and the magnetic flux passing through the second coil 232 is returned to the second magnet 231.

The controller controls the driving unit to sense the vibration of the digital camera from the vibration sensor and to vibrate the image sensor 250 in a direction to correct the vibration of the digital camera.

The elastic member serves to fix and support the stage 220 to the housing 210.

The elastic member is formed of a wire spring 240, one end of which is coupled to the housing 210 and the other end of which is coupled to the stage 220.

At this time, the wire spring 240 is composed of at least three or more so as to stably support the stage 220.

In this embodiment, as shown in FIG. 5, four wire springs 240 are connected to edge portions of the stage 220, and the stage 220 is supported by the wire spring 240. To float in the housing 210.

At this time, the wire spring 240 should have a sufficient strength to overcome the load of the stage 220, of course.

In addition, the wire spring 240 may interconnect the upper portion of the stage 220 and the housing 210 without connecting the lower portion of the stage 220 and the housing 210.

When the plurality of wire springs 240 are mounted, it is preferable that the elastic force acting in the X-axis direction and the Y-axis direction is the same.

By using the elastic member made of a wire spring 240 as described above to securely support the stage 220 to the housing 210, by the elastic force of the elastic member the stage 220 can always be placed in the initial position In addition, since only the elastic member supports the stage 220, the friction force is hardly applied to move the stage 220, so that the stage 220 can be moved with little energy.

In addition, since the wire spring 240 is used, only one stage 220 equipped with the image sensor 250 can be moved in the X-axis direction and the Y-axis direction, thereby reducing the number of parts, thereby reducing the cost and Can be reduced in size.

In this case, ribs are formed in the housing 210, the X-axis stage 220, and the Y-axis stage 220, respectively, so that the X-axis stage 220 and the Y-axis stage 220 are formed in the housing 210. It may be to slide along.

Hereinafter, the operating state of the second embodiment consisting of the components as described above.

When the digital camera is turned off, the stage 220 is in an initial position by the elastic force of the wire spring 240.

Even if the digital camera vibrates, the stage 220 is always returned to the initial position by the elastic force of the elastic member made of the wire spring 240.

Therefore, the controller can quickly know the initial position of the image sensor 250.

Meanwhile, when a separate vibration sensor detects the vibration of the digital camera and transmits the vibration to the controller, the controller drives the Y-axis driving unit and the X-axis driving unit to drive the stage 220 on which the image sensor 250 is mounted. The vibration of the image captured by the image sensor 250 is prevented by moving in the direction of correcting the vibration.

In this process, first, when a current is applied to the first coil 222 from the controller, the magnetic flux from the first magnet 221 passes through the first coil 222 and the stage 220 is applied to the first coil 222. The electromagnetic force to move in the Y axis direction is generated.

By the electromagnetic force, the stage 220 overcomes the elastic force of the wire spring 240 and moves finely in the Y-axis direction. The stage 220 moves in the Y-axis direction to compensate for the vibration in the Y-axis direction of the digital camera device. Compensate for on-axis tremors.

In this process, the first yoke 223 improves the driving force by allowing the magnetic flux of the first magnet 221 to efficiently return to the first magnet 221 after passing through the first coil 222.

At the same time, when a current is applied to the second coil 232 from the controller, the magnetic flux from the second magnet 231 passes through the second coil 232 and the stage 220 is moved to the second coil 232 in the X-axis direction. An electromagnetic force is generated to move it.

By the electromagnetic force, the stage 220 overcomes the elastic force of the wire spring 240 and moves finely in the X-axis direction, and moves in the X-axis direction to compensate for the vibration in the X-axis direction of the digital camera device. Compensate for on-axis tremors.

In this process, the second yoke 233 improves the driving force by allowing the magnetic flux of the second magnet 231 to efficiently return to the second magnet 231 after passing through the second coil 232.

In addition, the driving force of the Y-axis direction drive unit and the X-axis direction drive unit should be greater than the elastic resistance of the wire spring 240 made of the wire spring 240.

At this time, since the stage 220 is connected only by the wire spring 240, since the friction force hardly acts when moving, the energy required for the driving unit can be reduced.

In this way, the image sensor 250 is driven in a direction for correcting the vibration of the digital camera, thereby compensating for the shaking of the image captured by the image sensor 250.

On the other hand, when the driving force applied to the Y-axis direction drive unit and the X-axis direction drive unit is removed, the stage 220 is returned to the initial position by the elastic force of the wire spring 240.

The shake correction apparatus of the digital camera of the present invention is not limited to the above-described embodiment, and may be variously modified and implemented within the range to which the technical idea of the present invention is permitted.

According to the shake correction apparatus of the digital camera of the present invention as described above has the following advantages.

First, by mounting the elastic member to support the stage fixed to the housing, the image sensor is normally in the initial position to reduce the power consumption required to move the image sensor to the initial position, and the controller quickly recognizes the initial position and reacts. Can improve speed.

In addition, since the stage is supported only by the elastic member, it is possible to move the stage with little energy by minimizing the frictional force when the stage is moved.

Second, the X-axis stage by the elastic member is composed of a Y-axis elastic member for supporting and supporting the Y-axis stage to the housing, and an X-axis elastic member for connecting and supporting the X-axis stage to the Y-axis stage, The image sensor mounted in the can be easily moved in the X-axis direction and the Y-axis direction, and the stage can be connected to the housing only by the elastic member can obtain the effects as described above.

Third, by allowing the elastic member to be a leaf spring, the elastic member can be moved to the initial position of the stage more quickly.

In addition, at least two elastic members are formed so as to face each other, so that the stage is equally supported by the elastic members at both sides and subjected to the elastic force with the same force.

Fourth, the Y-axis elastic members are mounted to face each other in the Y-axis direction, and the X-axis elastic members are mounted to face each other in the X-axis direction, so that the elastic members made of the leaf springs are bent better and restored to their original positions faster. Can be.

Fifth, by mounting a support member between the X-axis stage and the Y-axis stage, it is possible to obtain the effect that the X-axis stage and the Y-axis stage is guided by the support member when moving.

Sixth, the X-axis elastic member is made of a straight leaf spring, and the Y-axis elastic member is made of a deflection plate spring, so that the amount of deformation of the Y-axis elastic member can be increased, so that the Y-axis stage and the X-axis Since the amount of movement of the stage can be made almost the same, and the amount of deformation of the Y-axis elastic member is large, the Y-axis stage can be moved with little energy.

Seventh, the elastic member is composed of a wire spring, one end of which is coupled to the housing and the other end of which is coupled to the stage, so that only one stage on which the image sensor is mounted can be moved in the X axis direction and the Y axis direction. It can reduce the size and also reduce the size of the product.

Eighth, by mounting at least three wire springs to support the stage, the wire spring can stably support the stage.

Claims (8)

delete A housing; A stage disposed inside the housing and mounted with an image sensor; A driving unit for driving the stage; A controller for detecting the vibration of the digital camera from the vibration sensor and controlling the driving unit to vibrate the image sensor in a direction to correct the vibration of the digital camera; It comprises an elastic member for supporting the stage by connecting to the housing, The stage, An X axis stage provided to be movable in the X axis direction, and a Y axis stage provided to be movable in the Y axis direction perpendicular to the X axis stage in a plane, The elastic member, And a Y-axis elastic member for supporting the Y-axis stage by connecting the Y-axis stage to the housing, and an X-axis elastic member for supporting the X-axis stage by connecting the Y-axis stage to the housing. The method of claim 2, The elastic member is made of a leaf spring, made of at least two or more camera shake correction device, characterized in that mounted to face each other. delete The method of claim 3, wherein At the center of the housing is formed a support member parallel to the stage and guides the movement of the stage, The Y-axis stage is connected to the support member by the Y-axis elastic member at the lower portion of the support member, And the X-axis stage is connected to the Y-axis stage by the X-axis elastic member at an upper portion of the support member. The method of claim 5, The X-axis elastic member is made of a straight plate spring of the connection between the X-axis stage and the Y-axis stage, the Y-axis elastic member is made of a refracting plate spring characterized in that connecting the Y-axis stage and the support member Digital camera shake correction device. A housing; A stage disposed inside the housing and mounted with an image sensor; A driving unit for driving the stage; A controller for detecting the vibration of the digital camera from the vibration sensor and controlling the driving unit to vibrate the image sensor in a direction to correct the vibration of the digital camera; It comprises an elastic member for supporting the stage by connecting to the housing, The elastic member, And a wire spring having one end coupled to the upper or lower portion of the housing and the other end coupled to the stage such that the stage floats within the housing. The method of claim 7, wherein And at least three wire springs to support the stage.

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