KR102063715B1 - Camera module - Google Patents

Abstract

A camera module is disclosed. The camera module of the present invention may implement a general camera and an iris camera as one module by moving the optical filter unit.
The camera module of the present invention includes an optical unit including a lens unit including a lens for refracting and condensing light, a part of which is disposed below the lens unit, and includes a first optical filter and a second optical filter for passing light of different bands. A filter part, an opening is formed, the optical filter part is seated so as to cover a part of the opening, and includes a base and a coil and a magnet including a guide part for guiding movement of the optical filter part, and between the coil and the magnet. An external force is generated by the interaction to move the optical filter unit in a direction orthogonal to the optical axis of the lens such that one optical filter selected from the first optical filter and the second optical filter is positioned below the lens unit. A drive unit, the magnet is coupled to the optical filter unit, the coil is coupled to the base, and the magnet When the first optical filter is positioned below the lens unit, the second is located at the first position, when said second optical filter is positioned below the lens unit, the position is in the second position.

Description

Camera Module {CAMERA MODULE}

The present invention relates to a camera module, and more particularly, to a camera module mounted on an electronic device such as a smart phone to capture an image.

Smart electronic devices such as smartphones and tablet computers may perform complex functions. Specifically, recent smartphones may perform financial functions, mobile shopping functions, and healthcare functions, as well as conventional call and text message delivery. As a result, the amount of information processed by the smart electronic device increases, and sensitive personal information is processed. Therefore, security technology of smart electronic devices has emerged as an important factor.

Iris recognition technology has been spotlighted as more secure than other security technologies. Iris recognition technology mainly irradiates the iris with an infrared lamp, and detects light in the infrared band reflected from the iris to capture an image of the iris. To this end, the camera module should selectively detect only the infrared band. Therefore, the iris recognition camera is installed in front of the electronic device separately from the general camera. Korean Unexamined Patent Publication No. 10-2016-0036359 (published on April 4, 2015) discloses that a general camera and an iris recognition camera are respectively installed on the front of an electronic device.

However, installing an iris recognition camera separately from a general camera causes an increase in the unit cost of the electronic device. In addition, a proximity sensor, an illuminance sensor, and a status indicator are installed on the front of the electronic device, in addition to the general camera. In addition, a transmission window must be additionally formed on the front surface of the electronic device, which is a factor in reducing the aesthetics of the electronic device.

It is an object of the present invention to provide a camera module that implements a general camera and an iris camera as one module.

Another object of the present invention is to provide a camera module having a structure capable of minimizing a space occupied by a driving unit in moving an optical filter unit.

Another object of the present invention is to provide a camera module having a structure in which durability can be ensured even if the optical filter unit is repeatedly moved.

Another object of the present invention is to provide a camera module having a structure that can minimize the power consumed to move the optical filter unit.

The camera module of the present invention for solving the above problems, the lens unit including a lens for refracting and condensing light, the first optical filter and the second part of which is located under the lens unit, the light passing through different bands An optical filter unit including an optical filter, an opening is formed, the optical filter unit is seated so as to cover a part of the opening, and includes a base including a guide unit for guiding movement of the optical filter unit, and a magnet; An external force is generated by the interaction between the coil and the magnet to move the optical filter unit in a direction orthogonal to the optical axis of the lens so that one optical filter selected from the first optical filter and the second optical filter An optical filter driving unit positioned at an upper portion of the magnet, wherein the magnet is coupled to the optical filter unit, and the coil is connected to the bay And the magnet is positioned at a first position when the first optical filter is positioned below the lens portion, and at a second position when the second optical filter is positioned below the lens portion. Done.

In one embodiment of the present invention, the optical filter unit is coupled to the first optical filter and the second optical filter, and further includes a filter holder seated on the base, the filter holder may be coupled to the magnet. .

In one embodiment of the invention, when the magnet is located in the first position, at least a portion of the magnet may be located inside the coil.

In one embodiment of the present invention, the optical filter driving unit may further include a yoke for generating an attraction force between the magnet.

In one embodiment of the present invention, the yoke may be located closer to the first position than the second position.

In one embodiment of the present invention, when the magnet is located in the first position, and the current is not applied to the coil, the magnet is located in the first position by the attraction force generated between the yoke. Can be maintained.

In one embodiment of the present invention, when the magnet is located in the first position, the attraction force generated between the magnet and the yoke may be greater than the gravity applied to the magnet and the optical filter portion.

In one embodiment of the present invention, when the magnet is located in the first position and no current is applied to the coil, the magnet may be maintained in the first position.

In one embodiment of the present invention, the first optical filter may pass light in the visible light band, the second optical filter may pass light in the infrared band.

In one embodiment of the present invention, the first optical filter may block light in the infrared band.

In one embodiment of the present invention, the lens unit further comprises an autofocus driving unit for moving in the direction of the optical axis, the autofocus driving unit may include an autofocus coil and an autofocus magnet.

In one embodiment of the present invention, it may further include a circuit board for applying a current to the coil and the autofocus coil from the outside.

In one embodiment of the present invention, the coil may include a first coil and a second coil, the first coil may be located near the first position, and the second coil may be located near the second position. have.

In one embodiment of the present invention, when the magnet is located in the first position, the magnet is located in the first coil is inserted, and when the magnet is located in the second position, the magnet The second coil may be inserted and positioned inside the coil.

In one embodiment of the present invention, the magnet includes a first magnet and a second magnet, the coil may be located between the first magnet and the second magnet.

In one embodiment of the present invention, when the magnet is located in the first position, the second magnet is inserted into the coil and positioned, and when the magnet is located in the second position, the first magnet May be inserted into the coil.

The camera module according to an embodiment of the present invention may implement a general camera and an iris camera as one module.

In addition, the camera module according to an embodiment of the present invention can minimize the space occupied by the driving unit in moving the optical filter unit.

In addition, the camera module according to an embodiment of the present invention is guaranteed enough durability even if the optical filter unit is repeatedly moved.

In addition, the camera module according to an embodiment of the present invention can minimize the power consumed to move the optical filter unit.

1 is a perspective view of a camera module according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the top cover removed from the camera module shown in FIG. 1.
3 is an exploded perspective view of the camera module shown in FIG. 2.
4 is a perspective view illustrating a part of the camera module shown in FIG. 2.
5 is a perspective view illustrating a part of the camera module shown in FIG. 4 in another state.
6 is a plan view illustrating a part of a camera module according to another exemplary embodiment of the present invention.
7 is a plan view illustrating a part of a camera module in another state according to another embodiment of the present invention.
8 is a plan view illustrating a part of a camera module according to another exemplary embodiment of the present invention.
9 is a plan view showing a part of the camera module according to another embodiment of the present invention in another state.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention; In describing the present invention, if it is determined that adding specific descriptions of techniques or configurations already known in the art may make the gist of the present invention unclear, some of them will be omitted from the detailed description. In addition, terms used in the present specification are terms used to properly express the embodiments of the present invention, which may vary according to related persons or customs in the art. Therefore, the definitions of the terms should be made based on the contents throughout the specification.

Hereinafter, a camera module according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

1 is a perspective view of a camera module according to an embodiment of the present invention.

Referring to FIG. 1, the lens 110 is exposed above the camera module. The lens 110 is disposed such that the vertical direction of the camera module is in the optical axis direction. The lens 110 may have a plurality of lenses 110 aligned in one direction and coupled to the inside of the lens barrel 120. The camera module captures an image of a subject located on the top of the camera module.

In the present specification, the vertical direction or the optical axis direction of the camera module corresponds to the Z axis direction illustrated in FIG. 1. In this specification, the horizontal direction or the direction orthogonal to the optical axis of the camera module corresponds to the direction orthogonal to the Z axis, and is determined by a combination of the X axis direction and the Y axis direction.

FIG. 2 is a perspective view illustrating the removal of the upper cover 700 from the camera module shown in FIG. 1. 3 is an exploded perspective view of the camera module shown in FIG. 2.

2 and 3, the camera module of the present invention includes a lens unit 100, an autofocus driving unit 200, a circuit board 300, an optical filter unit 400, a base 500, and an optical filter driving unit ( 600).

The lens unit 100 includes a lens 110, a lens barrel 120, and a lens carrier 130. The lens 110 refracts and condenses light. The lens 110 is arranged so that one or more lenses face each other, and is coupled to the lens barrel 120. The lens barrel 120 may be formed in a cylindrical shape and an opening may be formed in at least a portion of the upper and lower surfaces thereof. The lens barrel 120 is formed of a light blocking resin material to block external light from passing through the lens barrel 120 and entering the inside. The lens carrier 130 may be coupled to the outside of the lens barrel 120. The lens carrier 130 receives the external force by the autofocus driver 200 to move the lens unit 100 in the optical axis direction. A part of the autofocus driver 200 may be coupled to the lens carrier 130. As the lens unit 100 moves in the optical axis direction, the subject is focused.

The autofocus driving unit 200 includes an autofocus coil 210 and an autofocus magnet 220. The autofocus driving unit 200 generates an external force between the autofocus coil 210 and the autofocus magnet 220 to move the lens unit 100 in the optical axis direction. One of the autofocus coil 210 and the autofocus magnet 220 is coupled to the lens unit 100 side, and the other is coupled to the lens unit 100 side and the lens unit 100 in a state facing the Separate from). In the accompanying drawings, the autofocus magnet 220 is coupled to the lens unit 100, and the autofocus coil 210 is separated from the lens unit 100 in a state opposite to the autofocus magnet 220. Is shown. But the opposite is also true.

The circuit board 300 for applying a current from the outside to the autofocus coil 210 may be further included. The circuit board 300 includes a circuit pattern for transmitting current. One end of the circuit pattern may be connected to an external terminal, and the other end may be connected to both ends of the auto focus coil 210 to apply a current to the coil 610. The circuit board 300 may be formed of a flexible printed circuit board (FPCB).

In the circuit board of the part where the other end of the circuit pattern is formed, the coil 610 may be coupled to one surface of the circuit board 300 and connected to the other end of the circuit pattern. In addition, the yoke 230 may be coupled to the other surface of the circuit board 300 of the portion. Therefore, the yoke 230 may face the magnet 220 for autofocus with the circuit board 300 and the coil 610 of the other end of the circuit pattern formed therebetween. The magnetic flux of the magnet 220 for autofocus is concentrated by the yoke 230 toward the coil 610. In addition, the yoke 230 is in close contact with the magnet for autofocus 220 in the yoke 230 direction.

The autofocus driver 200 may include a bearing 240 to minimize friction generated when the lens unit 100 moves in the optical axis direction. Bearing 240 may be, for example, a ball bearing. The ball bearing 240 includes a plurality of balls and a bearing path through which the ball can roll and move. Specifically, the bearing may be located between the lens carrier 130 and the upper cover 700. Although the upper cover 700 is not illustrated in FIGS. 2 and 3, the ball bearing 240 is positioned between the portion facing the lens carrier 130. A bearing path formed in the form of a groove is formed at a portion of the lens carrier 130 and the upper cover 700 facing each other. And the plurality of balls are located on the bearing path to rotate as the lens unit 100 moves in the optical axis direction to minimize friction. Since the lens unit 100 is in close contact with the yoke 230 by the attraction force between the magnet 220 for autofocus and the yoke 230, the lens carrier 130 and the upper cover having the ball bearing 240 interposed therebetween. 700) is also in close contact.

An image sensor (not shown) is positioned below the lens unit 100. The image sensor may be located surrounded by the base 500. The image sensor is an electronic device that converts light passing through the lens unit 100 into an electrical signal. The image sensor may detect light in the visible and infrared bands and convert the light into an electrical signal. The image sensor includes a plurality of pixels to capture an image of the subject.

The optical filter unit 400 includes a first optical filter 410, a second optical filter 420, and a filter holder 430. The first optical filter 410 and the second optical filter 420 pass light of different bands. In detail, the first optical filter 410 may pass light in the visible light band but block light in the infrared band. The first optical filter 410 may be used when capturing a conventional image. The second optical filter 420 may pass through light in the infrared band but block light in the visible band. This second optical filter 420 may be used to pick up an infrared image or, in particular, to pick up an infrared image of the iris.

The first optical filter 410 and the second optical filter 420 are coupled to the filter holder 430. The filter holder 430 may be coupled to edge portions of the first optical filter 410 and the second optical filter 420. The first optical filter 410 and the second optical filter 420 may be arranged in a direction perpendicular to the optical axis. 2 and 3, the first optical filter 410 and the second optical filter 420 are formed to be arranged in the X-axis direction.

The optical filter unit 400 may move in a direction perpendicular to the optical axis by the optical filter driver 600 to be described later. In detail, the optical filter unit 400 moves in the direction in which the first optical filter 410 and the second optical filter 420 are arranged. 2 and 3, the optical filter unit 400 moves in the X-axis direction. The optical filter unit 400 is moved so that any one of the first optical filter 410 and the second optical filter 420 is positioned below the lens unit 100. The one optical filter is positioned between the lens unit 100 and the image sensor to selectively pass the light passing through the lens unit 100. Therefore, only the light of the band selectively passed by the optical filter is irradiated to the image sensor. The other optical filter is positioned at a position other than the lens unit 100 and the image sensor.

As the first optical filter 410 and the second optical filter 420 are selectively positioned below the lens unit 100, the image sensor receives light of a different band. In detail, when the first optical filter 410 is positioned below the lens unit 100, the image sensor receives visible light. In addition, when the second optical filter 420 is positioned below the lens unit 100, the image sensor receives infrared rays.

Images having different characteristics may be captured according to the selected optical filter. Specifically, when the first optical filter 410 is located below the lens unit 100, the conventional camera corresponds to capturing an image. The resulting image is similar to the image captured by a conventional camera and similar to that seen by the human eye. On the other hand, when the second optical filter 420 is located below the lens unit 100, the infrared camera is similar to the image pickup image. The image may be similar to the image captured by the infrared camera. This can be used when imaging an image in a low light condition, such as at night. It can also be used when capturing images for specific purposes, such as for iris recognition.

The base 500 is a portion on which the optical filter unit 400 is seated. An opening 510 is formed in the center portion of the base 500, and the optical filter part 400 is seated while covering at least a part of the opening 510. Specifically, the base 500 includes a guide portion 520 extending inwardly of the opening 510. In the filter holder 430 of the optical filter unit 400, the seating unit 431 is positioned above the guide unit 520. The optical filter unit 400 may include a seating unit 431 of the filter holder 430 may correspond to an edge of the filter holder 430. The optical filter unit 400 may move in a direction orthogonal to the optical axis by the optical filter driver 600 while maintaining the seating unit 431 of the filter holder 430 positioned above the guide unit 520. have.

An image sensor is positioned below the base 500. The lens unit 100 is positioned above the base 500. The base 500 may be combined with the upper cover 700 to form an inner space. At least a portion of the autofocus driver 200 and the optical filter driver 600 may be accommodated in the internal space. In addition, an autofocus coil 210 and a circuit board 300 for applying a current to the coil 610 of the optical filter driver 600 may be combined.

The optical filter driver 600 includes a coil 610, a magnet 620, and a yoke 630. The optical filter unit 400 moves in a direction orthogonal to the optical axis due to the force generated by the interaction between the coil 610 and the magnet 620. One of the magnet 620 and the coil 610 is coupled to the optical filter unit 400 to move integrally. The other one of the magnet 620 and the coil 610 is separated from the optical filter unit 400 and fixed separately from the movement of the optical filter unit 400. The other of the magnet 620 and the coil 610 may be coupled to the base 500.

2 and 3, the magnet 620 is coupled to the optical filter unit 400, and the coil 610 is coupled to the base 500. Hereinafter, this configuration will be described in detail.

The magnet 620 is coupled to the optical filter unit 400. In detail, the magnet holder 621 is formed at a portion extending from one side of the filter holder 430. The magnet holder 621 extends from one side of the filter holder 430 and is positioned above the base 500. The magnet 620 is coupled to the magnet holder 621. The magnet 620 is positioned above the base 500.

Coil 610 is coupled to base 500. The coil 610 is disposed so that the center hole faces the magnet 620. The coil 610 and the magnet 620 are disposed to face each other in a direction perpendicular to the optical axis. In detail, the direction in which the coil 610 and the magnet 620 face each other is the same direction as the direction in which the first optical filter 410 and the second optical filter 420 are arranged. 2 and 3, the direction in which the coil 610 and the magnet 620 face each other corresponds to the X-axis direction.

The coil 610 may be applied with current from the outside by the circuit board 300. The circuit board 300 includes a circuit pattern for transmitting current. One end of the circuit pattern may be connected to an external terminal, and the other end may be connected to both ends of the coil 610 to apply a current to the coil 610. The circuit board 300 may be formed of a flexible printed circuit board (FPCB). The circuit board 300 for applying current to the coil 610 of the optical filter driver 600 and the circuit board 300 for applying current to the autofocus coil 210 may be formed as one.

The yoke 630 is installed at a position opposite to the magnet 620. In detail, the yoke 630 may be installed at a position opposite to the magnet 620 with the coil 610 interposed therebetween. The yoke 630 is formed of a magnetic material to generate an attraction force with the magnet 620. Although not shown in FIGS. 2 and 3, the yoke 630 may be coupled to the top cover 700 and disposed to face the magnet 620.

The operation of the optical filter driver 600 will be described in detail below.

4 and 5 are perspective views illustrating a part of the camera module illustrated in FIG. 2. Specifically, FIGS. 4 and 5 show only the optical filter unit, the base, and the optical filter driver in the camera module shown in FIG. 2.

4 and 5 illustrate that the optical filter unit is moved and positioned at different positions by the operation of the optical filter driver. Although the lens unit is not shown in FIGS. 4 and 5, referring to FIGS. 1 to 3, it can be seen that the lens unit 100 is positioned at the center of the base 500. In consideration of this, FIG. 4 illustrates a state in which the second optical filter 420 is disposed below the lens unit 100, and FIG. 5 illustrates that the first optical filter 410 is disposed below the lens unit 100. It shows the state where it is located.

4 and 5, the movement of the coil 610 and the magnet 620 will be described. When a current is applied to the coil 610, attraction or repulsive force is generated between the magnet 620 and the coil 610. The attractive force or repulsive force may be determined according to the direction of the current applied to the coil 610. Therefore, by controlling the current applied to the coil 610, it is possible to control the movement of the magnet 620. Since the magnet 620 moves integrally with the optical filter unit 400, the magnet 620 may adjust the movement of the optical filter unit 400.

When repulsive force is generated between the magnet 620 and the coil 610, the magnet 620 moves away from the coil 610. If at least a portion of the magnet 620 is inserted into the center hole of the coil 610, it is exposed to the outside of the magnet 620. In FIG. 4, a repulsive force is generated between the magnet 620 and the coil 610 to move the magnet 620 away from the coil 610. In this case, the second optical filter 420 is positioned below the lens unit 100.

When an attraction force occurs between the magnet 620 and the coil 610, the magnet 620 moves close to the coil 610. At this time, at least a portion of the magnet 620 may be inserted into the center hole of the coil 610. In FIG. 5, a repulsive force is generated between the magnet 620 and the coil 610 to move the magnet 620 closer to the coil 610. In this case, the first optical filter 410 is in a state below the lens unit 100.

In the camera module, any one of the first optical filter 410 and the second optical filter 420 may be mainly used. As described above, if the first optical filter 410 passes the light in the visible light band and the second optical filter 420 passes the light in the infrared band, the first optical filter 410 is the lens unit ( Located at the bottom of 100) may be mainly used. In some cases, the reverse is also possible.

In the case where the first optical filter 410 is positioned below the lens unit 100, the optical filter unit 400 needs to be maintained at a corresponding position. It is shown in FIG. 5 that the optical filter unit 400 is positioned at the corresponding position. The optical filter unit 400 and the magnet 620 that is integrally coupled to the optical filter unit 400 are affected by gravity. Therefore, if there is no external force enough to offset the gravity of the optical filter unit 400 and the magnet 620, the optical filter unit 400 will not be maintained at a specific position will move.

Specifically, in the state where the optical filter unit 400 is located as shown in FIG. 5, no external force is applied to the optical filter unit 400 and the magnet 620 (that is, no current is applied to the coil 610 and the yoke Assuming that 630 is also absent.) If the camera module is oriented so that the first optical filter 410 faces downward, the optical filter unit 400 may be located in the direction in which the first optical filter 410 is located. It will flow down. Therefore, the second optical filter 420 will be positioned below the lens unit 100. This is not intended by the user. Considering that the camera module of the present invention is not always disposed and used in a certain direction, this situation can occur sufficiently.

If the yoke 630 is not present, an external force may be generated by continuously applying current to the coil 610 to maintain the positions of the optical filter unit 400 and the magnet 620. Specifically, when the attraction force to offset the gravity applied to the optical filter unit 400 and the magnet 620 between the coil 610 and the magnet 620 in the state as shown in Figure 5 the optical filter unit 400 ) And the magnet 620 may be maintained. In addition, the optical filter unit 400 is generated when a repulsive force capable of canceling the gravity applied to the optical filter unit 400 and the magnet 620 is disposed between the coil 610 and the magnet 620 in the state shown in FIG. And the position of the magnet 620 can be maintained.

However, in this case, since a current must be continuously applied to the coil 610, there is a problem that power consumption increases. In addition, since the current must be continuously applied to the coil 610, the amount of heat is increased, which may negatively affect other parts of the camera module.

The yoke 630 may generate an attraction force between the magnet 620 and maintain the positions of the optical filter unit 400 and the magnet 620 even when no current is applied to the coil 610. The attraction force between the magnet 620 and the yoke 630 depends on the distance between the magnet 620 and the yoke 630. Specifically, when the magnet 620 and the yoke 630 are located close, the attraction force between the magnet 620 and the yoke 630 is strongly generated. On the other hand, when the magnet 620 and the yoke 630 is located far, the attraction force between the magnet 620 and the yoke 630 is weakly generated. Here, the distance between the magnet 620 and the yoke 630 and the size of the attraction force is relative.

As shown in FIG. 5, the attraction force generated between the magnet 620 and the yoke 630 while the magnet 620 is located close to the yoke 630 is applied to the optical filter unit 400 and the magnet 620. The position of the optical filter unit 400 and the magnet 620 may be maintained if the gravity can offset the gravity. In this case, a separate current does not need to be applied to the coil 610. Therefore, in order to maintain the positions of the optical filter unit 400 and the magnet 620, it is possible to reduce the heat generation without consuming additional power. However, in this state, in order to move the magnet 620 away from the coil 610, a force sufficient to offset the attraction force between the magnet 620 and the yoke 630 should be applied.

As shown in FIG. 4, in a state where the magnet 620 is located far from the yoke 630, the optical filter unit 400 and the magnet 620 may be moved by an attraction force generated between the magnet 620 and the yoke 630. It is difficult to maintain position. In order for the optical filter unit 400 to be positioned at the position shown in FIG. 4, the yoke 630 should be positioned in a direction opposite to that shown in FIG. 4.

Hereinafter, a camera module according to another exemplary embodiment of the present invention will be described with reference to FIGS. 6 and 7.

6 and 7 illustrate that the optical filter unit is moved and positioned at different positions by the operation of the optical filter driver of the camera module according to another exemplary embodiment of the present invention. 6 and 7 correspond to plan views seen from above of the state in which the top cover is removed from the camera module. 6 illustrates a state in which the second optical filter 420 is disposed below the lens unit 100, and FIG. 7 illustrates a state in which the first optical filter 410 is disposed below the lens unit 100. will be.

6 and 7, the coil 610 includes a first coil 611 and a second coil 612. The first coil 611 is located near the first position, and the second coil 612 is located near the second position. The magnet 620 is moved between the first coil 611 and the second coil 612.

By applying current to the first coil 611 and the second coil 612, the magnet 620 can receive an external force to move toward the first position and an external force to move toward the second position. have.

6 illustrates a case where the magnet 620 is located in the second position. The magnet 620 may generate repulsive force with the first coil 611 and may generate attraction force with the second coil 612 to move to the second position. When the magnet 620 is located in the second position, the magnet 620 may be inserted into the second coil 612 and positioned. In this case, the second optical filter 420 is positioned below the lens unit 100.

7 illustrates a case in which the magnet 620 is located at the first position. The magnet 620 may generate an attraction force with the first coil 611 and may generate repulsion with the second coil 612 to move to the first position. When the magnet 620 is located in the first position, the magnet 620 may be inserted into the first coil 611 and positioned. In this case, the first optical filter 410 is positioned below the lens unit 100.

Hereinafter, a camera module according to another embodiment of the present invention will be described with reference to FIGS. 8 and 9.

8 and 9 illustrate that the optical filter unit is moved and positioned at different positions by the operation of the optical filter driver of the camera module according to another exemplary embodiment of the present invention. 8 and 9 correspond to plan views viewed from above of the state in which the top cover is removed from the camera module. 8 illustrates a state in which the second optical filter 420 is positioned below the lens unit 100, and FIG. 9 illustrates a state in which the first optical filter 410 is positioned below the lens unit 100. will be.

8 and 9, the magnet 620 includes a first magnet 621 and a second magnet 622. The first magnet 621 and the second magnet 622 are spaced apart from each other, the coil 610 is located between the first magnet 621 and the second magnet 622.

The first magnet 621 and the second magnet 622 are positioned so that one surface thereof faces each other. Each surface of the first magnet 621 and the second magnet 622 facing each other may be magnetized to have the same polarity.

As a current is applied to the coil 610, the attraction force or repulsive force is generated between the coil 610 and the first magnet 621 and the second magnet 622. Specifically, the coil 610 generates a force opposite to the first magnet 621 and the second magnet 622. For example, when an attractive force is generated between the coil 610 and the first magnet 621, the repulsive force is generated between the coil 610 and the second magnet 622. On the other hand, when repulsive force is generated between the coil 610 and the first magnet 621, the attraction force is generated between the coil 610 and the second magnet 622.

8 illustrates a case where the magnet 620 is located in the second position. When the attraction force is generated between the coil 610 and the first magnet 621, and the repulsive force is generated between the coil 610 and the second magnet 622 may move the magnet 620 to the second position. When the magnet 620 is located in the second position, the first magnet 621 may be inserted into the coil 610 and positioned. In this case, the second optical filter 420 is positioned below the lens unit 100.

9 illustrates a case in which the magnet 620 is located at the first position. When a repulsive force is generated between the coil 610 and the first magnet 621, and attraction force is generated between the coil 610 and the second magnet 622, the magnet 620 may move to the first position. When the magnet 610 is located in the first position, the second magnet 621 may be inserted into the coil 610 and positioned. In this case, the first optical filter 410 is positioned below the lens unit 100.

In the above, embodiments of the camera module of the present invention have been described. The present invention is not limited to the above-described embodiment and the accompanying drawings, and various modifications and variations will be possible in view of those skilled in the art to which the present invention pertains. Therefore, the scope of the present invention should be defined not only by the claims of the present specification but also by the equivalents of the claims.

100: lens unit
110: lens 120: lens barrel
130: lens carrier
200: autofocus drive unit
210: autofocus coil 220: autofocus magnet
230: yoke for autofocus 240: ball bearing
300: circuit board
400: optical filter unit
410: first optical filter 420: second optical filter
430: filter holder 431: seating portion
500: base
510: opening 520: guide portion
600: optical filter drive unit
610: coil 620: magnet
621: magnet holder 630: yoke
700: top cover

Claims (16)

A lens unit including a lens for refracting and condensing light;
An optical filter part including a first optical filter and a second optical filter positioned at a lower part of the lens part and allowing light of different bands to pass therethrough;
A base having an opening formed therein, the optical filter being seated so as to cover a part of the opening and including a guide part for guiding movement of the optical filter part; And
And a coil and a magnet, and an external force is generated by the interaction between the coil and the magnet to move the optical filter unit in a direction orthogonal to the optical axis of the lens. An optical filter includes an optical filter driver for positioning the lower portion of the lens,
The magnet is coupled to the optical filter portion, the coil is coupled to the base,
The magnet is positioned at a first position when the first optical filter is positioned below the lens unit, and when the second optical filter is positioned below the lens unit, the optical axis of the first position and the lens. Is located at a second position spaced apart in a direction orthogonal to
The coil includes a first coil and a second coil spaced apart from each other along a direction orthogonal to the optical axis of the lens,
The first coil is located in the first position, the second coil is located in the second position,
When the magnet is located in the first position, the magnet is inserted and positioned inside the first coil,
When the magnet is located in the second position, the magnet is inserted into the second coil camera module.
A lens unit including a lens for refracting and condensing light;
An optical filter part including a first optical filter and a second optical filter positioned at a lower part of the lens part and allowing light of different bands to pass therethrough;
A base having an opening formed therein, the optical filter being seated so as to cover a part of the opening and including a guide part for guiding movement of the optical filter part; And
And a coil and a magnet, and an external force is generated by the interaction between the coil and the magnet to move the optical filter unit in a direction orthogonal to the optical axis of the lens. An optical filter includes an optical filter driver for positioning the lower portion of the lens,
The magnet is coupled to the optical filter portion, the coil is coupled to the base,
The magnet includes a first magnet and a second magnet spaced apart from each other along a direction orthogonal to the optical axis of the lens,
The first magnet and the second magnet are respectively positioned at the first position when the first optical filter is located below the lens unit, and when the second optical filter is located below the lens unit, respectively. The second position spaced apart along the direction perpendicular to the first position and the optical axis of the lens,
The coil is located between the first magnet and the second magnet,
When the second magnet is located in the first position, the second magnet is inserted into the coil and positioned,
And the first magnet is inserted into the coil and positioned when the first magnet is located in the second position.
The method according to claim 1 or 2,
The optical filter unit further includes a filter holder coupled to the first optical filter and the second optical filter and seated on the base.
The filter holder is coupled to the magnet camera module.
The method according to claim 1 or 2,
The optical filter driving unit further comprises a yoke for generating an attraction force with the magnet.
The method of claim 4, wherein
And the yoke is located closer to the first position than to the second position.
The method of claim 5,
And the magnet is located in the first position, and when the current is not applied to the coil, the magnet is maintained in the first position by the attraction force generated between the yoke.
The method of claim 5,
When the magnet is located in the first position, the attraction force generated between the magnet and the yoke is greater than the gravity applied to the magnet and the optical filter portion.
The method according to claim 1 or 2,
And the magnet is located at the first position and the magnet is maintained at the first position when no current is applied to the coil.
delete delete The method according to claim 1 or 2,
Further comprising an autofocus driving unit for moving the lens unit in the optical axis direction of the lens,
The autofocus driving unit includes an autofocus coil and an autofocus magnet.
The method of claim 11, wherein
The camera module further comprises a circuit board for applying a current to the coil and the autofocus coil from the outside.
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