KR100774545B1 - An apparatus for restoring to the original stage of digital camera - Google Patents

Abstract

An initial position restoring apparatus of a digital camera is disclosed. The disclosed initial position restoring apparatus includes a first elastic member supported on the base to apply a force to restore the initial position to the Y axis stage, and a second elastic member supported on the base to apply a force to restore the initial position to the X axis stage. Member. Such an initial position restoring device applies a force restored to an initial position to an image sensor installed so as to move in a direction that compensates vibration, so that the image sensor is normally in the initial position, thereby consuming a current to put the image sensor in the initial position. Reduce the speed and the controller can recognize the initial position quickly to improve the reaction speed.

Camera, shake, correction, leaf spring

Description

Initial position restoration device of digital camera {AN APPARATUS FOR RESTORING TO THE ORIGINAL STAGE OF DIGITAL CAMERA}

1 is an exploded perspective view of a vibration correction device according to an embodiment of the present invention;

Figure 2 is a perspective view of the coupled state of the correction device shown in FIG.

3 is a cross-sectional view of the Y axis of the compensator shown in FIG. 2;

FIG. 4 is a cross-sectional view of the X axis of the compensator shown in FIG. 2.

<Explanation of symbols for main parts of drawing>

100: base 102: first guide rib

110: Y axis stage 120: Y axis shaft

122: Y-axis holder 124: second guide rib

126: third guide rib 130: the first coil

132: first magnet 134: first yoke

140: first leaf spring 142: first bracket

150: X axis stage 154: Fourth guide rib

160: X axis shaft 162: X axis holder

170: second coil 172: second magnet

174: second yoke 180: second leaf spring

182: second bracket 200: image sensor

The present invention relates to an initial position restoring apparatus of a digital camera, and more particularly, by applying a force restored to an initial position to an image sensor installed so as to move in a direction that compensates for vibration, so that the image sensor is normally in an initial position, This is to reduce the current consumption to place the image sensor in the initial position and to allow the control unit to quickly recognize the initial position to improve the reaction speed.

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 current was consumed, and the initial setting time of the camera was long.

The present invention has been made to solve the above problems, an object of the present invention is to apply the force restored to the initial position to the image sensor installed to move in the direction to compensate for vibration so that the image sensor is in the initial position normally By reducing the current consumption for placing the image sensor in the initial position, the controller can recognize the initial position quickly to improve the reaction speed.

The present invention for achieving the above object, the base fixed to the digital camera, the Y-axis stage is installed to be movable in the Y-axis direction on the base, and for driving the Y-axis stage in the Y-axis direction A Y-axis drive unit, an X-axis stage mounted on the Y-axis stage so as to be movable in a plane perpendicular to the Y-axis, and mounted with an image sensor, and the X-axis stage in the X-axis direction X-axis driving unit for driving, and installed in the digital camera on the base, and detects the vibration of the digital camera from a separate vibration sensor, the Y-axis driving unit and the X-axis driving unit to drive the image sensor In the digital camera having a control unit for vibrating in the direction of correcting the vibration of the digital camera,

A first elastic member supported by the base for applying a force to restore the Y-axis stage to an initial position; And

And a second elastic member supported by the base to apply a force for restoring to the initial position to the X-axis stage.

The first elastic member may be configured as a first leaf spring for generating a resistance force in the movement direction of the Y-axis stage.

And the first plate spring is made up of a pair arranged side by side is installed on the base or on one side of the Y-axis stage, the other side is fixed to the first bracket having a projection that is sandwiched between the pair of the first plate spring Can be.

The second elastic member may be configured as a second leaf spring for generating a resistance force in the moving direction of the X-axis stage.

The second plate spring may be formed in a pair arranged side by side and installed on one side of the base or the X-axis stage, and a second bracket having protrusions interposed between the pair of second plate springs may be fixed to the other side. have.

Hereinafter, a preferred embodiment of the shake correction apparatus for a digital camera according to the present invention will be described.

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

The correction device shown in this figure includes a base 100 fixed to a digital camera; A Y-axis stage 110 installed on the base 100 to be movable in the Y-axis direction; A Y-axis direction driver for driving the Y-axis stage 110 in the Y-axis direction; An X-axis stage 150 installed on the Y-axis stage 110 so as to be movable in the X-axis direction perpendicular to the Y-axis and on a plane, and on which the image sensor 200 is mounted; An X-axis direction driver for driving the X-axis stage 150 in the X-axis direction; And installed in the digital camera on the base 100, and detects the vibration of the digital camera from a separate vibration sensor, by driving the Y-axis drive and the X-axis drive to the image sensor 200 to correct the vibration of the digital camera It is made of a control unit for vibrating in the direction.

The Y-axis shaft 120 is fixed to one side of the Y-axis stage 110 in the Y-axis direction, and the second guide rib 124 is formed on the other side in a direction parallel to the Y-axis shaft 120. And one side of the base 100 is fixed to the Y-axis holder 122 that is slidably coupled to the Y-axis shaft 120, the other side of the first guide rib slidably coupled to the second guide rib 124 102 is formed.

One side of the Y-axis stage 110 is supported by the Y-axis shaft 120 and the other side is coupled to the first guide rib 102 and the second guide rib 124 by the Y-axis shaft 120 and the Y-axis holder. Since a strong engagement relationship is maintained at the engagement portion of the 122, but a large friction force is generated, one side is coupled to the first guide rib 102 and the second guide rib 124 to reduce the friction force.

The Y-axis driving unit includes a first magnet 132 fixed to the base 100; The Y-axis stage 110 is fixed to the Y-axis stage 110, is wound several times, and is disposed in the magnetic field region of the first magnet 132, and receives the magnetic flux of the first magnet 132 when the current is supplied to the Y-axis stage 110. It consists of a first coil 130 for generating an electromagnetic force to drive in the axial direction.

The Y-axis driving unit is configured to concentrate the magnetic flux emitted from the first magnet 132 toward the first coil 130 and to return the magnetic flux passing through the first coil 130 to the first magnet 132. 134).

The X-axis shaft 160 is fixed to the X-axis stage 160 in the X-axis direction, and a fourth guide rib 154 is formed in a direction parallel to the X-axis shaft 160. In addition, an X-axis holder 162 that is slidably coupled to the X-axis shaft 160 is fixed to one side of the Y-axis stage 110, and a third that is slidably coupled to the fourth guide rib 154 to the other side. Guide ribs 126 are formed.

The X-axis driving unit includes a second magnet 172 fixed to the base 100; The X-axis stage 150 is fixed to the X-axis stage 150, is wound several times, and is disposed in the magnetic field region of the second magnet 172, and receives the magnetic flux of the second magnet 172 when current is supplied to the X-axis stage 150. It consists of a second coil 170 for generating an electromagnetic force to drive in the direction.

The X-axis driving unit is configured to concentrate the magnetic flux from the second magnet 172 toward the second coil 170 and to return the magnetic flux passing through the second coil 170 to the second magnet 172 ( 174).

On the other hand, the first elastic member for applying a force for restoring to the initial position to the Y-axis stage 110 is fixed to the base 100. The first elastic member is composed of a first leaf spring 140 for generating a resistance force in the direction of movement of the Y-axis stage 110.

The first leaf spring 140 is formed of a pair arranged side by side, the first bracket 142 having a projection that is fitted between the pair of the first leaf spring 140 is fixed to the Y-axis stage (110).

The second elastic member is fixed to the base 100 to apply a force to restore the X-axis stage 150 to its initial position. The second elastic member is formed of a second leaf spring 180 that generates a resistance force in the direction of movement of the X-axis stage 150.

The second plate spring 180 is formed of a pair arranged side by side, and the second bracket 182 having a protrusion fitted between the pair of second plate springs 180 is fixed to the X-axis stage 150.

Hereinafter will be described the operation of the shake correction device of the digital camera as described above.

When the digital camera is turned off, the Y-axis stage 110 is in an initial position by receiving the elastic force of the first leaf spring 140, and the X-axis stage 150 also receives the elastic force of the second leaf spring 180. Will be in position. Even if the digital camera vibrates, the Y-axis stage 110 and the X-axis stage 150 always return to their initial positions by the elastic force of the first leaf spring 140 and the second leaf spring 180.

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

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 driver and the X-axis driver to vibrate the image sensor 200 in the direction of compensating the vibration of the digital camera. The shaking of the image captured by the image sensor 200 is prevented.

In this process, first, when a current is applied to the first coil 130 from the controller, the magnetic flux from the first magnet 132 passes through the first coil 130 and the Y-axis stage 110 in the first coil 130. ) To generate the electromagnetic force to move in the Y-axis direction. By the electromagnetic force, the Y-axis stage 110 moves in the Y-axis direction finely and moves in the direction of compensating the vibration in the Y-axis direction against the Y-axis vibration of the digital camera device to compensate for the vibration on the Y-axis.

In this process, the first yoke 134 improves the driving force by allowing the magnetic flux of the first magnet 132 to efficiently return through the first coil 130 and back to the first magnet 132.

At the same time, when a current is applied to the second coil 170 from the controller, the magnetic flux from the second magnet 172 passes through the second coil 170 and the X-axis stage 150 is applied to the second coil 170. The electromagnetic force to move in the axial direction is generated. By this electromagnetic force, the X-axis stage 150 moves finely in the X-axis direction and moves in the direction of correcting the vibration in the X-axis direction against the X-axis vibration of the digital camera device to compensate for the shake on the X-axis.

In this process, the second yoke 174 improves the driving force by allowing the magnetic flux of the second magnet 172 to efficiently return to the second magnet 172 after passing through the second coil 170.

In addition, the driving force of the Y-axis drive unit and the X-axis drive unit should be greater than the elastic resistance of the first leaf spring 140 and the second leaf spring 180.

In this way, the image sensor 200 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 200.

On the other hand, when the driving force applied to the Y-axis drive unit and the X-axis drive unit is removed, the Y-axis stage 110 and X-axis stage 150 is the elastic force of the first leaf spring 140 and the second leaf spring 180 Return to the initial position.

As described above, the present invention, by applying a force restored to the initial position to the image sensor installed so as to move in the direction to compensate for vibration, so that the image sensor is in the initial position normally, the current for placing the image sensor in the initial position Reduces the consumption of the controller and can quickly recognize the initial position in the controller to improve the reaction speed.

In the above, the present invention has been described as an embodiment, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described claims, and has a general knowledge in the field of the present invention without departing from the gist of the present invention. Anyone who grows up will be able to make various variations.

Claims (5)

delete delete A base fixed to the digital camera; A Y-axis stage mounted to the base to be movable in the Y-axis direction; A Y-axis direction driver for driving the Y-axis stage in the Y-axis direction; An X-axis stage mounted on the Y-axis stage to be movable in an X-axis direction orthogonal to the Y-axis and mounted with an image sensor; An X-axis direction driving unit for driving the X-axis stage in the X-axis direction; The base is installed in the digital camera, the vibration sensor of the digital camera is detected from a separate vibration sensor, the Y-axis drive unit and the X-axis drive unit for driving the image sensor to correct the vibration of the digital camera A control unit for vibrating; A first leaf spring supported by the base for applying a force to restore the Y-axis stage to an initial position; And a second leaf spring supported by the base for applying a force to restore the X-axis stage to an initial position. The first leaf spring is composed of a pair arranged side by side is installed on the base or on one side of the Y-axis stage, the other side is fixed to the first bracket having a projection that is sandwiched between the pair of the first leaf spring Initial position restoration device of a digital camera, characterized in that. delete A base fixed to the digital camera; A Y-axis stage mounted to the base to be movable in the Y-axis direction; A Y-axis direction driver for driving the Y-axis stage in the Y-axis direction; An X-axis stage mounted on the Y-axis stage to be movable in an X-axis direction orthogonal to the Y-axis and mounted with an image sensor; An X-axis direction driving unit for driving the X-axis stage in the X-axis direction; The base is installed in the digital camera, the vibration sensor of the digital camera is detected from a separate vibration sensor, the Y-axis drive unit and the X-axis drive unit for driving the image sensor to correct the vibration of the digital camera A control unit for vibrating; A first leaf spring supported by the base for applying a force to restore the Y-axis stage to an initial position; And a second leaf spring supported by the base for applying a force to restore the X-axis stage to an initial position. The second plate spring is composed of a pair arranged side by side is installed on one side of the base or the X-axis stage, the other side is fixed to the second bracket having a projection that is sandwiched between the pair of the second plate spring An initial position restoring device for a digital camera.

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