KR102654247B1 - Lens driving unit, light emitting module, and LiDAR - Google Patents

Abstract

The present invention relates to a lens driving device, light emitting module, and lidar. A lens driving device according to one aspect includes a first housing to which a first lens unit is coupled; A second housing to which the second lens unit is coupled; a first driving unit disposed in the first housing; a second driving unit disposed to face the first driving unit; a third driving unit disposed in the second housing; a fourth driving unit disposed to face the third driving unit; a first metal portion disposed in the first housing; a first coil portion disposed to face the first metal portion; a second metal portion disposed in the second housing; and a second coil portion disposed to face the second metal portion.

Description

Lens driving unit, light emitting module, and LiDAR}

This embodiment relates to a lens driving device, optical output module, and lidar.

LiDAR (Light Detection And Ranging) radiates light toward a target and can detect the distance, direction, speed, temperature, material distribution, and concentration characteristics to the object.

Lidar is used for purposes such as weather observation and distance measurement, but has recently been studied for autonomous driving and unmanned valet parking.

Lidar includes a light output module that irradiates light to an object, and a light reception module that detects light reflected from and incident on the object. However, in the conventional optical output module, there is a problem in that the angle of view is fixed depending on the shape of the lens. In addition, when a camera module with an auto focus (AF) function or a camera module with an optical image stabilization (OIS) function is applied to the optical output module, the amount of displacement of the angle of view is only small, which is a problem. Also, in this case, it is problematic because it is weak against shock.

The present invention was proposed to improve the above problems, and aims to provide a lidar capable of implementing a wide field of view (FOV) while reducing the lens size.

The lens driving device according to this embodiment includes a first housing to which a first lens unit is coupled; A second housing to which the second lens unit is coupled; a first driving unit disposed in the first housing; a second driving unit disposed to face the first driving unit; a third driving unit disposed in the second housing; a fourth driving unit disposed to face the third driving unit; a first metal portion disposed in the first housing; a first coil portion disposed to face the first metal portion; a second metal portion disposed in the second housing; and a second coil portion disposed to face the second metal portion.

The optical output module according to this embodiment includes a first housing to which a first lens unit is coupled; A second housing to which the second lens unit is coupled; a first driving unit disposed in the first housing; a second driving unit disposed to face the first driving unit; a third driving unit disposed in the second housing; a fourth driving unit disposed to face the third driving unit; a first metal portion disposed in the first housing; a first coil portion disposed to face the first metal portion; a second metal portion disposed in the second housing; a second coil portion disposed to face the second metal portion; and a substrate disposed below the first lens unit and having a light source disposed on its upper surface.

Lidar according to this embodiment includes an optical output module that irradiates light to an irradiated area, a light receiving module that detects light radiated from the optical output module and reflected from the irradiated area, and the optical output module detects light reflected from the irradiated area. The module includes a first housing to which a first lens unit is coupled; A second housing to which the second lens unit is coupled; a first driving unit disposed in the first housing; a second driving unit disposed to face the first driving unit; a third driving unit disposed in the second housing; a fourth driving unit disposed to face the third driving unit; a first metal portion disposed in the first housing; a first coil portion disposed to face the first metal portion; a second metal portion disposed in the second housing; a second coil portion disposed to face the second metal portion; and a substrate disposed below the first lens unit and having a light source disposed on its upper surface.

This embodiment has the advantage that scanning of a light source can be implemented.

In addition, as the lens size is reduced, the overall length of the lens driving device can be reduced, a wide angle of view can be realized, and the angle of view of the X-axis and Y-axis can be adjusted.

In addition, since the first holder part and the second holder part can be moved individually through separate driving units, there is an excellent effect in terms of stability.

1 is a perspective view of a lidar according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing the internal configuration of a lidar according to an embodiment of the present invention.
Figure 3 is an exploded perspective view of LiDAR according to an embodiment of the present invention.
Figure 4 is a perspective view of an actuator according to an embodiment of the present invention.
Figure 5 is an exploded perspective view of an actuator according to an embodiment of the present invention.
FIG. 6 is a cross-sectional view showing lines X1-X2 of FIG. 4.
Figure 7 is a cross-sectional view showing the lower surface of the actuator body according to an embodiment of the present invention.
FIG. 8 is a cross-sectional view showing line Y1-Y2 of FIG. 4.
Figure 9 is a cross-sectional view showing the top surface of the actuator body according to an embodiment of the present invention.
Figure 10 is a cross-sectional view showing a position sensing structure according to an embodiment of the present invention.
Figure 11 is a cross-sectional view showing a modified example of the metal part and the coil part according to the present invention.
Figure 12 is a reference diagram illustrating the operation of an optical output module according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described through exemplary drawings. When assigning reference numerals to components in each drawing, identical components are indicated with the same reference numerals as much as possible, even if they are shown in different drawings.

Additionally, when describing the components of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term. When a component is described as being 'connected', 'coupled' or 'connected' to another component, that component may be directly connected, coupled or connected to that other component, but that component and that other component It should be understood that another component may be 'connected', 'combined', or 'connected' between elements.

Hereinafter, one of the first magnet, first coil, second magnet, and second coil will be referred to as the 'first driving unit', the other will be referred to as the 'second driving unit', and the other will be referred to as the 'third driving unit'. The remaining one can be called the '4th East District'. Meanwhile, the first magnet may be located in the second housing, and the first coil may be located in the first housing. Additionally, the second magnet may be located in the fourth housing, and the second coil may be located in the third housing.

Below, the configuration of the lidar according to this embodiment will be described.

LiDAR (Light Detection And Ranging) according to this embodiment can radiate light toward a target and detect the distance to the object, direction, speed, temperature, material distribution, and concentration characteristics.

LIDAR can be used for purposes such as weather observation or distance measurement. Additionally, LiDAR can be used for autonomous driving and unmanned valet parking.

Lidar according to this embodiment may include an optical output module and an optical reception module. Lidar may include a light output module that radiates light to the irradiated area. Lidar may include a light reception module that detects light irradiated from the light output module and reflected from the irradiated area.

The light receiving module can detect light irradiated from the light output module and reflected from the irradiated area. The light receiving module may include a substrate, a light receiving sensor, a heat dissipation member, and a lens driving device. The light receiving module can be manufactured by replacing the light source in the light output module with a light receiving sensor. Additionally, in the light receiving module, the heat dissipation member may be omitted. The description of the substrate, heat dissipation member, and lens driving device of the light receiving module can be analogously applied to the description of the substrate, heat dissipation member, and lens driving device of the light output module described below. The light receiving sensor can detect light irradiated from the light output module and reflected from the irradiated area. As an example, the light receiving sensor can detect infrared light. However, it is not limited to this.

The light output module can irradiate light to the irradiated area. The optical output module may include a laser diode. As an example, the optical output module can irradiate infrared light. However, it is not limited to this.

Below, the configuration of a LIDAR including an optical output module according to an embodiment of the present invention will be described.

Figure 1 is a perspective view of a lidar according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing the internal structure of a lidar according to an embodiment of the present invention, and Figure 3 is an exploded view of the lidar according to an embodiment of the present invention. It is a perspective view.

Referring to Figures 1 to 3, the outer shape of the lidar 100 according to an embodiment of the present invention is formed by the case 10. The case 10 is formed in a substantially rectangular parallelepiped shape, and a space is formed inside to accommodate electronic components for driving the LIDAR 100.

The case 10 may include a case body 10a, and an upper cover 70 and a lower cover 19 respectively coupled to the upper and lower sides of the case body 10a. Accordingly, the internal space of the case 20 can be shielded by combining the covers 19 and 70 and the case body 10a. In contrast, of course, the case 20 and the covers 19 and 70 can be formed as one body to form a space therein.

In the inner space of the case 10, a light output module 20 that irradiates light to the irradiated area and a light reception module 30 that detects light reflected from the irradiated area are disposed. The light output module 20 and the light reception module 30 can irradiate or receive light into and out of the case 10 through the glass 21 and 31 formed on the upper cover 70. there is.

In detail, the optical output module 20 and the optical reception module 30 are arranged adjacent to each other inside the case 10. A separate partition 11a may be disposed between the optical output module 20 and the optical reception module 30. The light output module 20 and the light reception module 30 may be covered by the glasses 21 and 31 of the upper cover 70. The glasses 21 and 31 are made of a transparent material so that light can pass through them. In more detail, the glasses 21 and 31 include a light output glass 31 disposed in the light output direction of the light output module 20 for the light emitted from the light output module 20 to pass through to the outside. , It may include a light-receiving glass 21 that is disposed to face the light-receiving area of the light-receiving module 20 and allows light reflected from the irradiated area to pass inside. Light incident from the light receiving glass 21 may be incident on light receiving lenses 32 and 33, which will be described later.

The glass 21, 31 may be made of transparent plastic to block visible light.

Meanwhile, the upper cover 70 may have a curved shape. When the lidar 100 is viewed from the side, the upper cover 70 may be formed in a curved shape with a central portion protruding. In addition, the glasses 21 and 31 coupled to the upper cover 70 are also formed in a curved shape to form a sense of unity with other areas of the upper cover 70.

*30 Referring to Figures 2 and 3, the LIDAR 10 includes the light output module 20 and the light reception module 30.

The light receiving module 30 may include light receiving lenses 32 and 33. The light receiving lenses 32 and 35 may include a first light receiving lens 32 and a second light receiving lens 33 located below the first light receiving lens 32.

The light receiving lenses 32 and 33 are disposed below the light receiving glass 31 in the internal space of the case 10. A lens receiving groove 30a is formed on the upper surface of the case body 10a to accommodate the light receiving lenses 32 and 33. The lens receiving groove 30a is recessed downward from the upper surface of the case body 10a to accommodate the light receiving lenses 32 and 33. The cross-sectional area of the lens receiving groove 30a may be formed to correspond to the cross-sectional area of the light receiving lenses 32 and 33.

The light receiving lenses 32 and 33 may be disposed on the upper side of the light receiving substrate 35. The second light receiving lens 33 disposed relatively lower among the light receiving lenses 32 and 33 is electrically connected to the light receiving substrate 35, and receives the light incident from the light receiving lenses 32 and 33. A signal through light may be input to the light receiving substrate 35.

Among the light receiving lenses 32 and 33, the first light receiving lens 52 disposed relatively above may have a curved shape with its center protruding upward. Therefore, light reflected from the irradiated area can easily be incident on the first light receiving lens 32. Also, the second light receiving lens 33 may be a converging lens. Additionally, the upper surfaces of the light receiving lenses 32 and 33 may be disposed relatively lower than the upper surface of the third lens unit 130, which will be described later. That is, the areas of the light receiving lenses 32 and 33 exposed to the outside have a vertical length that is shorter than that of the third lens unit 130. Because of this, the light reflected from the irradiated area can easily be incident on the light receiving module 30 rather than the light output module 20.

Separate substrates 16 and 18 may be additionally disposed below the light receiving substrate 35 and the optical output module 20. The light receiving substrate 35 and the separate substrates 16 and 18 may be coupled through fixing screws disposed on both sides facing each other. In addition, the light receiving substrate 35 and the separate substrates 16 and 18 may be electrically connected to each other by placing separate connection substrates 17 on both sides spaced apart from the fixing screws.

The separate boards 16 and 18 include a control board 18 for inputting control commands of the light output module 20 and the light reception module 30, and are disposed on the upper side of the control board 18. It may include a power board 16 for providing power to the optical output module 20 and the optical reception module 30. Accordingly, the separate boards 16 and 18 can transmit control commands necessary for driving the LIDAR 10 or provide power to each module 20 and 30.

Hereinafter, the configuration of the optical output module 20 will be described.

Figure 4 is a perspective view of an actuator according to an embodiment of the present invention, Figure 5 is an exploded perspective view of an actuator according to an embodiment of the present invention, Figure 6 is a cross-sectional view showing X1-X2 of Figure 4, and Figure 7 is a It is a cross-sectional view showing the lower surface of the actuator body according to an embodiment of the invention, Figure 8 is a cross-sectional view showing the line Y1-Y2 of Figure 4, and Figure 9 is a cross-sectional view showing the upper surface of the actuator body according to an embodiment of the present invention.

2 to 9, the optical output module 20 according to this embodiment may include a substrate 50, a light source 52, and a lens driving device. However, in the optical output module according to this embodiment, one or more of the substrate 50, the light source 52, and the lens driving device may be omitted or changed.

The substrate 50 may be combined with the light source 52. The substrate 50 may be electrically connected to the light source 52. In this case, the substrate 50 can supply the current necessary to drive the light source 52. The light source 52 may be coupled to the upper surface of the substrate 50. Heat dissipation fins (not shown) may be coupled to the upper and lower surfaces of the substrate 50. The substrate 50 may be, for example, a printed circuit board (PCB). However, it is not limited to this. Additionally, the board 50 may be electrically connected to the power board 16 or the control board 18 disposed below.

The light source 52 may be located below the lens unit 101. The light source 52 may be located below the first lens unit 110. The light source 52 may be coupled to the substrate 50 . The light source 52 may be electrically connected to the substrate 50. In this case, the light source 52 may receive power from the substrate 50. The light source 52 may be a laser diode. As an example, the light source 52 can irradiate infrared light. However, it is not limited to this.

The lens driving device may include a lens unit 101 and an actuator 200. However, in the lens driving device according to this embodiment, one or more of the lens unit 101 and the actuator 200 may be omitted or changed.

The lens unit 101 may be arranged to overlap the light source 52 mounted on the substrate 50. Through this structure, light emitted from the light source 52 can pass through the lens unit 101 and be emitted to the outside. The lens unit 101 may change the path of at least a portion of the light emitted from the light source 52. The lens unit 101 may include a plurality of lenses and a barrel for fixing the plurality of lenses. The lens unit 101 may be composed of a total of 6 lenses. The lens unit 101 may include first to sixth lenses 111, 112, 121, 122, 131, and 132. At this time, at least one of the first to sixth lenses (111, 112, 121, 122, 131, and 132) may be an aspherical lens. Alternatively, all of the first to sixth lenses 111, 112, 121, 122, 131, and 132 may be aspherical lenses.

The field of view (FOV) of the lens unit 101 may be 135 degrees to 145 degrees. The angle of view of the lens unit 101 may be formed by the actuator 200. That is, the angle of view of the lens unit 101 can be secured as the actuator 200 moves at least a portion of the lens unit 101.

The lens unit 101 may include a first lens unit 110, a second lens unit 120, and a third lens unit 130. However, in the lens unit 101, one or more of the third lens unit 130, the second lens unit 120, and the first lens unit 110 may be omitted or changed.

The lens unit 101 may include the third lens unit 130. At least a portion of the third lens unit 130 may be exposed to the image side. The lens unit 101 may include a second lens unit 120 located below the third lens unit 130. The lens unit 101 may include a first lens unit 110 located below the second lens unit 120.

The third lens unit 130, the second lens unit 120, and the first lens unit 110 may be arranged sequentially from top to bottom. At this time, the light source 420 may be located below the first lens unit 110. However, the third lens unit 130, the second lens unit 120, and the first lens unit 110 may be arranged in a different order.

At least a portion of the third lens unit 130 may be accommodated in the holder unit 500. The center of the third lens unit 130 may be exposed to the outside. The center of the third lens unit 130 may be exposed to the image side. The peripheral portion of the third lens unit 130 may be accommodated by the holder unit 500.

The third lens unit 130 may include a fifth lens 131, a sixth lens 132, and a third lens barrel 133. However, in the third lens unit 130, one or more of the fifth lens 131, the sixth lens 132, and the third lens barrel 133 may be omitted or changed.

The third lens unit 130 may include the sixth lens 132 located at the uppermost side. The third lens unit 130 may include the fifth lens 131 located below the sixth lens 132.

At least a portion of the sixth lens 132 may be accommodated in the holder unit 500. The sixth lens 132 may be disposed below the light output glass 31.

The center of the sixth lens 132 may be exposed to the image side. The peripheral portion of the sixth lens 132 may be accommodated by the holder unit 500. The sixth lens 132 may have the largest diameter compared to the first to fifth lenses 111, 112, 121, 122, and 131.

Meanwhile, the protrusion height of the lens of the light receiving module 30 that protrudes upward from the case may be formed to be lower than the protrusion height of the lens that protrudes outward of the light output module 20. For example, the protrusion height of the first light receiving lens 32 may be formed to be lower than the protrusion height of the sixth lens 132. Accordingly, the light emitted from the optical output module 20 can be prevented from being directly received by the light receiving module 30.

In order to increase the protrusion height of the optical output module 20, a step portion 25 is formed on the upper surface 10a of the case 10 to accommodate a portion of the upper side of the optical output module 20. The step portion 25 protrudes stepwise from the upper surface 10a of the case 10 and accommodates a portion of the upper portion of the optical output module 20. Additionally, a hole is formed on the upper surface of the stepped portion 25 to expose the sixth lens 132.

The fifth lens 131 may be located below the sixth lens 132. The fifth lens 131 may be located above the fourth lens 122. The diameter of the fifth lens 131 may be smaller than the diameter of the sixth lens 132 and larger than the diameter of the fourth lens 122. The fifth lens 131 may be arranged so that its optical axis coincides with the sixth lens 132.

The third lens barrel 133 may accommodate at least a portion of the sixth lens 132. The third lens barrel 133 may accommodate at least a portion of the sixth lens 132. The third lens barrel 133 may support the outer peripheral surface of the sixth lens 132. The third lens barrel 133 may support the outer peripheral surface of the sixth lens 132. The third lens barrel 133 may be accommodated inside the holder unit 500.

The second lens unit 120 may be coupled to the actuator 200. The second lens unit 120 may be moved by the actuator 200. The second lens unit 120 may move in a direction perpendicular to the optical axis of the lens unit 101. At this time, the movement of the second lens unit 120 in the optical axis direction of the lens unit 101 may be restricted. The top of the second lens unit 120 may directly contact the third lens unit 130. The upper end of the second lens unit 120 may support the lower end of the third lens unit 130. The lower end of the second lens unit 120 may directly contact the first lens unit 110. The lower end of the second lens unit 120 may be supported by the first lens unit 110.

The second lens unit 120 may move in the direction of a first axis perpendicular to the optical axis of the lens unit 101. The second lens unit 120 may move in a second axis direction that is perpendicular to the optical axis of the lens unit 101 and is different from the first axis direction. At this time, the first axis direction and the second axis direction may be perpendicular or intersect. In this case, the first axis direction may be referred to as the 'X-axis direction', and the second axis direction may be referred to as the 'Y-axis direction'. The second lens unit 120 may be movable by 2.8 mm to 3.2 mm in the first axis direction. The second lens unit 120 may be movable by 88㎛ to 92㎛ in the second axis direction. In this case, the angle of view of the lens unit 101 can be secured at 135 degrees to 145 degrees.

Meanwhile, an adjustment hole 11 (see FIG. 1) is formed on the side of the case 20 to expose the second lens unit 120 in the horizontal direction. The adjustment hole 11 is formed in an area of the side of the case 10 that overlaps the second lens unit 120 in the horizontal direction, and exposes the second lens unit 120 to the outside. Accordingly, the operator can adjust the position of the second lens unit 120 by inserting a separate tool into the adjustment hole 11.

The second lens unit 120 may include a third lens 121, a fourth lens 122, and a second lens barrel 123. However, in the second lens unit 120, one or more of the third lens 121, the fourth lens 122, and the second lens barrel 123 may be omitted or changed.

The second lens unit 120 may include the fourth lens 122 located below the fifth lens 131. The second lens unit 120 may include the third lens 121 located below the fourth lens 122. At this time, the third lens 121 and the fourth lens 122 may be called 'driving lenses'.

The fourth lens 122 may be located below the fifth lens 131. The fourth lens 122 may be located above the third lens 121. The fourth lens 122 may be fixed to the second lens barrel 123. The fourth lens 122 may be coupled to the actuator 200. The fourth lens 122 can be moved by the actuator 200. The fourth lens 122 may be arranged so that its optical axis coincides with that of the third lens 121. The diameter of the fourth lens 122 may correspond to the diameter of the third lens 121.

The third lens 121 may be located below the fourth lens 122. The third lens 121 may be fixed to the second lens barrel 123. The third lens 121 may be coupled to the actuator 200. The third lens 121 can be moved by the actuator 200.

The second lens barrel 123 may accommodate at least a portion of the third lens 121. The second lens barrel 123 may accommodate at least a portion of the fourth lens 122. The second lens barrel 123 may support the outer peripheral surface of the third lens 121. The second lens barrel 123 may support the outer peripheral surface of the fourth lens 122. The second lens barrel 123 may be accommodated inside the holder unit 500. The second lens barrel 123 may be coupled to the actuator 200. The second lens barrel 123 can be moved by the actuator 200. At least a portion of the lower surface of the second lens barrel 123 may be supported by the first lens barrel 113. In detail, the second lens barrel 123 may be supported on the first holder portion 1130 of the actuator 200.

The first lens unit 110 may be coupled to the actuator 200. The first lens unit 110 may be moved by the actuator 200. The first lens unit 110 may move in a direction perpendicular to the optical axis of the lens unit 101. At this time, movement of the first lens unit 110 in the optical axis direction of the lens unit 101 may be restricted. The first lens unit 110 may be located below the second lens unit 120. The first lens unit 110 may be located above the light source 52.

The first lens unit 110 may include the first lens 111, the second lens 112, and the first lens barrel 113. However, in the first lens unit 110, one or more of the first lens 111, the second lens 112, and the first lens barrel 113 may be omitted or changed.

The first lens unit 110 may include the second lens 112 located below the third lens 121. The first lens unit 110 may include a first lens 111 located below the second lens 112. The first lens unit 110 may include the first lens barrel 113 that accommodates the first lens 111 and the second lens 112.

The second lens 112 may be located below the third lens 121. The second lens 112 may be located above the first lens 111. The second lens 112 may be supported on the first lens barrel 113. The second lens 112 may be arranged so that its optical axis coincides with the first lens 111 and the sixth lens 132. The second lens 112 may be a lens for focusing. In this case, the second lens 112 may be called a ‘focusing lens’.

The first lens 111 may be located below the second lens 112. The first lens 111 may be located above the light source 52. The first lens 121 may be supported by the first lens barrel 113. The first lens 111 may be arranged so that its optical axis coincides with that of the second lens 112. The first lens 111 may be a lens for collimating. That is, the first lens 112 can generate parallel light through the light emitted from the light source 52. In this case, the first lens 111 may be called a ‘collimating lens’.

The first lens barrel 113 can accommodate the first lens 111. The first lens barrel 113 can accommodate the second lens 112. The first lens barrel 113 may support the outer peripheral surface of the first lens 111. The first lens barrel 113 may support the outer peripheral surface of the second lens 112.

The holder unit 500 may accommodate at least a portion of the lens unit 101. The holder unit 500 may fix the third lens unit 130. The holder unit 500 can movably accommodate the second lens unit 120 therein. That is, the holder unit 500 can fix the third lens unit 130 and the first lens unit 110 and movably accommodate the second lens unit 120. The holder unit 500 may accommodate an actuator 200 that moves the second lens unit 120 therein.

The actuator 200 may be referred to as the ‘Voice Coil Motor (VCM)’. The actuator 200 may move the lens unit 101 coupled to the actuator 200 through electromagnetic interaction.

The outer shape of the actuator 200 is formed by combining the cover 201 and the base 202. The first housing 230 and the second housing 240 may be movably disposed in the space formed between the cover 201 and the base 202. An actuator body 203 may be additionally disposed between the cover 201 and the base 202. For this reason, the cover 201 forms the upper surface of the actuator 200, the base 202 forms the lower surface of the actuator 200, and the actuator body 203 forms the upper surface of the actuator 200. sides can be formed. Meanwhile, an exposure hole 201a may be formed in the cover 201 to expose the second lens unit 120 or the first lens unit 110 upward.

The actuator 200 may move the second lens unit 120 or the first lens unit 110. The actuator 200 may move the second lens unit 120 or the first lens unit 110 in a direction perpendicular to the optical axis of the lens unit 100. At this time, movement of the second lens unit 120 and the first lens unit 110 in the optical axis direction may be restricted. Here, the 'optical axis' may be referred to as the 'vertical direction', 'vertical direction', and 'Z-axis direction'. Additionally, the 'direction perpendicular to the optical axis' may be referred to as the 'front/back/left/right direction', the 'horizontal direction', and the 'X-axis/Y-axis direction'. The actuator 200 may move the second lens unit 120 in the first axis direction and the first lens unit 110 in the second axis direction. At this time, the first axis direction and the second axis direction may meet to form an incline. Additionally, the first axis direction and the second axis direction may be perpendicular to each other. At this time, the first axis may be referred to as the 'X axis', and the second axis may be referred to as the 'Y axis'. That is, the actuator 200 can move the second lens unit 120 in the X-axis direction and the first lens unit 110 in the Y-axis direction. At this time, the directions of the second lens unit 120 and the first lens unit 110 may change. That is, the first lens unit 110 can be moved in the X-axis direction, and the second lens unit 120 can be moved in the Y-axis direction.

The actuator 200 may include a first axis drive unit, a second axis drive unit, and a drive substrate 1500. However, in the actuator 200, one or more of the first axis driving unit, the second axis driving unit, and the driving substrate 1500 may be omitted or modified.

The actuator 200 may include a first axis driving unit that moves the first lens unit 110 in the first axis direction. The actuator 200 may include a second axis driving unit that moves the second lens unit 120 in the second axis direction.

The first axis driving unit may move the first lens unit 110 in the first axis direction. The first axis driving unit can move the first lens unit 110 in the X-axis direction. In this case, the first axis driving unit may be referred to as an ‘X-axis driving unit’.

The first axis drive unit may include a first housing 240, a first magnet 254, and a first housing coil 264. However, in the first axis drive unit, one or more of the first housing 240, the first magnet 254, and the first housing coil 264 may be omitted or changed.

The first axis driving unit may include a first housing 240 to which the first lens unit 110 is coupled. The first housing 240 may be disposed below the actuator body 203 with respect to the actuator body 203. The first housing 240 may be moved in the X-axis direction from the lower side of the actuator body 203.

The first housing 230 combines a body 242 with a lens coupling hole 245 in the center where the first lens unit 110 is coupled, and a first magnet extending to both sides of the body 242. Includes part 244. And, the first magnet 254 is disposed on the first magnet coupling portion 244 extending opposite to each other from the body 242 where the lens coupling hole 245 is formed. In addition, a first housing coil 264 that performs electromagnetic interaction with the first magnet 254 is provided in the area of the lower surface of the actuator body 203 facing the first magnet 254.

In detail, the first magnet coupling portion 244 is provided in plurality to face each other around the body 242. In addition, the first magnet coupling portion 244 may be provided with a first magnet receiving groove 245 that is more recessed than other areas to accommodate the first magnet 254. At this time, the arrangement direction of the first magnet coupling portion 244 may intersect the moving direction of the first housing 240. This can be understood that when the first housing 240 moves in the X-axis direction, the arrangement direction of the plurality of first magnet coupling parts 244 forms the Y-axis direction.

The first magnet 254 may be accommodated in the first magnet coupling portion 244. The first magnet 254 may be provided in each of the plurality of first magnet coupling portions 244. At this time, the number of first magnets 254 accommodated in one first magnet coupling portion 244 may be plural. As an example, a plurality of pairs of first magnets 254 may be disposed in the first housing 240, each in a first magnet coupling portion 244. The pair of first magnets 254 may have different polarities.

The first housing coil 264 may be provided in an area facing the first magnet 254, respectively. The first housing coil 264 may be electrically connected to the driving substrate 1500. As an example, the first housing coil 264 may be electrically connected to the first coil coupling portion 1510 disposed on the driving substrate 1500.

The first housing 240 can slide and move on the lower surface of the actuator body 203. Referring to FIG. 6, a first guide portion 320 may be disposed between the lower surface of the actuator body 203 and the upper surface of the first housing 240. The first guide part 320 may include a guide ball and a guide rail. Therefore, by electromagnetic interaction between the first magnet 254 and the first housing coil 264, the first housing 240 can move in the X-axis direction on the lower surface of the actuator body 203. .

The second axis driving unit may move the second lens unit 120 in the second axis direction. The second axis driving unit may move the second lens unit 120 in the Y-axis direction. In this case, the second axis driving unit may be referred to as a ‘Y-axis driving unit’.

The second axis driving unit may include a second housing 230, a second magnet 252, and a second housing coil 262. However, in the second axis drive unit, one or more of the second housing 230, the second magnet 252, and the second housing coil 262 may be omitted or changed.

The second axis driving unit may include a second housing 230 to which the second lens unit 120 is coupled. The second housing 230 may be disposed above the actuator body 203 with respect to the actuator body 203 . The second housing 230 may be moved in the Y-axis direction from the upper side of the actuator body 203.

The second housing 240 combines a body 232 with a lens unit coupling hole 231 in the center where the second lens unit 120 is coupled, and a second magnet extending to both sides of the body 232. Includes part 234. In addition, the second magnet 252 is disposed on the second magnet coupling portion 234 that extends opposite to each other from the body 232 where the lens coupling hole 231 is formed. In addition, a second housing coil 262 that performs electromagnetic interaction with the second magnet 252 is provided in the area of the upper surface of the actuator body 203 facing the second magnet 252.

In detail, the second magnet coupling portion 234 is provided in plurality to face each other around the body 232. In addition, the second magnet coupling portion 234 may be provided with a second magnet receiving groove 235 that is more recessed than other areas to accommodate the first magnet 252. At this time, the arrangement direction of the second magnet coupling portion 234 may intersect the moving direction of the second housing 230. This can be understood that when the second housing 230 moves in the Y-axis direction, the arrangement direction of the plurality of second magnet coupling parts 234 forms the X-axis direction.

The second magnet 252 can be accommodated in the second magnet coupling portion 234. The second magnet 252 may be provided in each of the plurality of second magnet coupling portions 234. At this time, the number of second magnets 252 accommodated in one second magnet coupling portion 234 may be plural. As an example, a plurality of pairs of second magnets 252 may be disposed in the second housing 230, each in a second magnet coupling portion 234. The paired second magnets 252 may have different polarities.

The second housing coil 262 may be provided in an area facing the second magnet 252, respectively. In more detail, the second housing coil 262 may be placed in the second coil receiving groove 204 formed on the upper surface of the actuator body 203. At this time, the second housing coil 262 may be arranged to face the second magnet 252. The second housing coil 262 may be electrically connected to the driving substrate 1500. As an example, the second housing coil 262 may be electrically connected to the second coil coupling portion 1520 disposed on the driving substrate 1500.

The second housing 230 can slide on the upper surface of the actuator body 203. Referring to FIG. 8, a second guide portion 310 may be disposed between the upper surface of the actuator body 203 and the upper surface of the second housing 230. The second guide unit 310 may include a guide ball and a guide rail. Therefore, by electromagnetic interaction between the second magnet 252 and the second housing coil 262, the second housing 230 can move in the X-axis direction on the upper surface of the actuator body 203. .

To describe the operation of the lens driving device according to an embodiment of the present invention, first, the first lens unit 110 is moved along the X-axis by electromagnetic interaction between the first magnet 254 and the first coil 264. can be moved in any direction. Additionally, the second lens unit 120 may be moved in the Y-axis direction by electromagnetic interaction between the second magnet 252 and the second coil 262. Therefore, since the second lens unit 120 and the first lens unit 110 can be operated by individual driving, the overall length of the lens driving device can be reduced as the lens size is reduced, and a wide angle of view can be realized. It has the advantage of being able to adjust the angle of view on the X-axis and Y-axis.

Additionally, since the second lens unit 120 and the first lens unit 110 are operated by separate drives, more stable X-axis/Y-axis driving is possible.

Hereinafter, the position sensing structure of the first housing 240 and the second housing 230 will be described.

Figure 10 is a cross-sectional view showing a position sensing structure according to an embodiment of the present invention.

Referring to FIGS. 6 to 10, the actuator 200 according to an embodiment of the present invention is based on the amount of change in inductance due to movement of the first housing 240 and the second housing 230, The position and movement distance of the first housing 240 and the second housing 230 are detected.

In detail, the first housing 240 may be provided with a first metal portion 274. The first metal part 274 may be made of a metal material. For example, the first metal part 274 may be aluminum (Al). The first metal portion 274 may be disposed on the lower surface of the first magnet coupling portion 244 among the outer surfaces of the first housing 240. The first metal portion 274 may be provided only on the lower surface of any first magnet coupling portion 244 among the plurality of first magnet coupling portions 244 disposed on both sides of the first housing 240. Alternatively, the first metal portion 274 may be provided on both sides of the first housing 240, respectively.

In addition, a first coil part 282 is provided on the inner surface of the actuator 200 facing the first metal part 274 to detect the amount of inductance change due to movement of the first metal part 274. It can be. The first coil portion 282 may be a coil wound on the upper surface of the first substrate 281. In addition, the first substrate 281 extends outside the actuator 200 and is electrically connected to another substrate, so that location information of the first housing 240 can be transmitted and received.

One end of the first metal part 274 is formed in a pointed cross-sectional shape so that the cross-sectional area becomes narrower toward the end. And, the first coil part 282 is wound in a spiral shape on the top surface of the first substrate 281. In some cases, the first coil portion 282 may be wound to form a plurality of concentric circles.

Therefore, as the first housing 240 moves, the amount of change in inductance due to the movement of the first metal part 274 can be sensed by the first coil part 282. At this time, the cross-sectional shape of one end of the first metal part 274 is formed into a pointed shape, and the first coil part 282 is wound in a spiral shape, so that the amount of inductance change of the first metal part 274 can be more accurately determined. It can be detected. This is due to setting the shape so that the amount of inductance change due to movement of the first housing 240 changes linearly.

The second housing 230 may be provided with a second metal portion 272. The second metal part 272 may be made of a metal material. For example, the second metal part 272 may be aluminum (Al). The second metal part 272 may be disposed on the upper surface of the second magnet coupling part 234 among the outer surfaces of the second housing 230. The second metal portion 272 may be provided only on the upper surface of any first magnet coupling portion 234 among the plurality of second magnet coupling portions 234 disposed on both sides of the second housing 230. Alternatively, the second metal portion 272 may be provided on both sides of the second housing 230, respectively.

In addition, a second coil part 284 is provided on the inner surface of the actuator 200 facing the second metal part 272 to detect the amount of inductance change due to movement of the second metal part 272. It can be. The second coil unit 284 may be a coil wound on the lower surface of the second substrate 285. In addition, the second substrate 285 extends outside the actuator 200 and is electrically connected to another substrate, so that location information of the second housing 240 can be transmitted and received.

One end of the second metal portion 272 is formed in a pointed cross-sectional shape so that the cross-sectional area becomes narrower toward the end. And, the second coil part 284 is wound in a spiral shape on the lower surface of the second substrate 285. In some cases, the second coil portion 284 may be wound to form a plurality of concentric circles.

Therefore, as the second housing 230 moves, the amount of change in inductance due to the movement of the second metal part 272 can be sensed by the second coil part 284. At this time, similarly, the amount of inductance change due to movement of the second housing 230 can be detected as a linear change according to the cross-sectional shape of the second metal part 272 and the second coil part 284. You can.

Figure 11 is a cross-sectional view showing a modified example of the metal part and the coil part according to the present invention.

The coil part 600 shown in FIG. 11 is a modified example of the above-described first coil part 282 or the second coil part 284, and the metal part 472 is a combination of the first metal part 274 and the second metal part. It is understood as a modified example of the unit 272.

Referring to FIG. 11, the coil portion 600 is stepped on one side of the substrate 610 to form a constant distance 620 from each other along the direction of movement of the first housing 240 and the second housing 230. can be formed. For example, the cross-sectional shape of the coil unit 600 may be a stepped pyramid shape.

In this case, the cross section of the metal portion 472 may be formed to be rectangular. In the case of the rectangular metal part 472, when facing the step-shaped coil part 600, the inductance of the metal part 472 can be linearly sensed by the coil part 600, so that the first housing The positions of 240 and the second housing 230 can be accurately detected.

In addition, when the cross-sectional shape of the coil portion 600 is formed into a stepped pyramid shape, the amount of change in inductance can be detected from the first magnet 254 or the second magnet 252, which has a rectangular cross-section rather than a separate metal portion. Therefore, there is an advantage that the number of parts can be reduced.

Hereinafter, the operation of the optical output module according to an embodiment of the present invention will be described with reference to the drawings.

Figure 12 is a reference diagram illustrating the operation of an optical output module according to an embodiment of the present invention.

In this embodiment, the third lens unit 130 and the light source 52 are fixed to the substrate 50. However, the first lens unit 110 and the second lens unit 120 may move in the X-axis direction or Y-axis direction, respectively, with respect to the substrate 50.

Here, the description is limited to the movement of the first lens unit 110 in the X-axis direction and the movement of the second lens unit 120 in the Y-axis direction. However, the movement of the second lens unit 120 in the The first lens unit 110 may move in the Y-axis direction. Additionally, each lens unit 110 and 120 may move in three or more axes.

The optical output module according to this embodiment can radiate light to the point indicated by start in FIG. 12. Thereafter, the first driving unit moves the first lens unit 110 by a second distance L2 in the first direction parallel to the X-axis (see A in FIG. 12). In more detail, when power is supplied to the first housing coil 264, the first magnet 254 of the first housing 240 electromagnetically interacts with the first housing coil 264, thereby forming the first lens unit. The first housing 240 on which 110 is disposed moves integrally in the first direction. The second housing 230 is fixed.

Thereafter, the second driving unit moves the second lens unit 120 by a first distance L1 in a second direction parallel to the Y-axis direction (B). In more detail, when power is supplied to the second housing coil 262, the second magnet 252 located in the second housing 230 electromagnetically interacts with the second housing coil 262 to form the second lens unit. The second housing 230 on which 120 is disposed moves integrally in the second direction.

Thereafter, the first axis driving unit moves the first lens unit 110 a second distance L2 in a third direction opposite to the first direction (C). In this case as well, when power is supplied to the first housing coil 264, the first housing 240 on which the second lens unit 110 is disposed moves as one unit.

Thereafter, the second axis driving unit moves the second lens unit 120 by a first distance L1 in the second direction (D). In this case as well, when power is supplied to the second housing coil 262, the second housing 230 including the second lens unit 120 moves integrally in the second direction.

Thereafter, as described above, the first axis driving unit and the second axis driving unit operate alternately to move the second lens unit 120 or the first lens unit 110 (see E, F, and G in FIG. 7). ).

Thereafter, the second axis driving unit moves by three times the first distance (L1) in the fourth direction opposite to the second direction (H). Accordingly, the first lens unit 110 arrives at the point marked End/Start and completes one cycle. At this time, the driving cycle of the first lens unit 110 may be performed at a 20Hz cycle. Meanwhile, the first distance L1 shown in FIG. 7 may be 0.6 mm. That is, the Y-axis displacement of the optical output module according to this embodiment may be 0.6 mm. Additionally, the second distance L2 may be 4 mm. That is, the X-axis movement displacement of the optical output module according to this embodiment may be 4 mm.

However, the movements of the first lens unit 110 and the second lens unit 120 described above are exemplary and may be modified in various ways. Additionally, since movement of any one of the first lens unit 110 and the second lens unit 120 does not affect the other lens unit, each lens unit can be driven individually and independently.

In the above, just because all the components constituting the embodiment of the present invention have been described as being combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, as long as it is within the scope of the purpose of the present invention, all of the components may be operated by selectively combining one or more of them. In addition, terms such as 'include', 'comprise', or 'have' described above mean that the corresponding component may be present, unless specifically stated to the contrary, and therefore do not exclude other components. Rather, it should be interpreted as being able to include other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the present invention.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but rather to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

Claims (11)

A first housing to which the first lens unit is coupled;
A second housing to which the second lens unit is coupled;
a first driving unit disposed in the first housing;
a second driving unit disposed to face the first driving unit;
a third driving unit disposed in the second housing;
a fourth driving unit disposed to face the third driving unit;
a first metal portion disposed in the first housing;
a first coil portion disposed to face the first metal portion;
a second metal portion disposed in the second housing; and
It includes a second coil portion disposed to face the second metal portion,
The first housing is driven in a first direction,
The second housing is driven in a second direction perpendicular to the first direction,
The first direction and the second direction are directions perpendicular to the optical axis directions of the first lens unit and the second lens unit, respectively.
According to claim 1,
A lens driving device in which the position and distance information of the first housing or the second housing are sensed based on the amount of inductance change resulting from movement of the first housing or the second housing.
According to claim 1,
A lens driving device comprising a first substrate on which the first coil unit is wound, and a second substrate on which the second coil unit is wound.
According to claim 1,
A lens driving device wherein the first metal portion and the second metal portion are each made of aluminum (Al).
According to claim 1,
The cross-sectional shape of the first metal part or the second metal part is formed in a pointed shape at one end,
A lens driving device wherein the first coil unit or the second coil unit is wound in a spiral manner.
According to claim 1,
The cross-sectional shape of the first metal part or the second metal part is formed in a rectangular shape,
A lens driving device wherein the first coil part or the second coil part is formed in a stepped pyramid shape in cross section.
According to claim 1,
The first driving part and the third driving part are each a magnet,
A cross section of the first coil portion or the second coil portion is formed in a stepped pyramid shape,
A lens driving device wherein the first coil unit or the second coil unit detects inductance of the first driving unit or the third driving unit.
delete delete A first housing to which the first lens unit is coupled;
A second housing to which the second lens unit is coupled;
a first driving unit disposed in the first housing;
a second driving unit disposed to face the first driving unit;
a third driving unit disposed in the second housing;
a fourth driving unit disposed to face the third driving unit;
a first metal portion disposed in the first housing;
a first coil portion disposed to face the first metal portion;
a second metal portion disposed in the second housing;
a second coil portion disposed to face the second metal portion; and
A substrate disposed below the first lens unit and having a light source disposed on its upper surface,
The first housing is driven in a first direction,
The second housing is driven in a second direction perpendicular to the first direction,
The first direction and the second direction are directions perpendicular to optical axes of the first lens unit and the second lens unit, respectively.
It includes an optical output module that radiates light to the irradiated area, and a light receiving module that detects light radiated from the optical output module and reflected from the irradiated area,
The optical output module is,
A first housing to which the first lens unit is coupled;
A second housing to which the second lens unit is coupled;
a first driving unit disposed in the first housing;
a second driving unit disposed to face the first driving unit;
a third driving unit disposed in the second housing;
a fourth driving unit disposed to face the third driving unit;
a first metal portion disposed in the first housing;
a first coil portion disposed to face the first metal portion;
a second metal portion disposed in the second housing;
a second coil portion disposed to face the second metal portion; and
A substrate disposed below the first lens unit and having a light source disposed on its upper surface,
The first housing is driven in a first direction,
The second housing is driven in a second direction perpendicular to the first direction,
The first direction and the second direction are directions perpendicular to the optical axis directions of the first lens unit and the second lens unit, respectively.