Lens driving unit, light emitting module, and LiDAR

Abstract

The present invention relates to a lens driving device, a light-emitting module, and a lidar. A lens driving device according to one aspect comprises: a first housing to which a first lens part is coupled; a second housing to which a second lens part is coupled; a first driving part disposed in the first housing; a second driving part disposed facing the first driving part; a third driving part disposed in the second housing; and a fourth driving part disposed facing the third driving part, wherein the first housing has a longitudinal direction in a first direction and the first driving part is disposed at each end, and the second housing has a longitudinal direction in a second direction perpendicular to the first direction and the third driving part is disposed at each end.

Description

Technology Field

[0001] The present embodiment relates to a lens driving device, an optical output module, and a lidar. Background Technology

[0003] LiDAR (Light Detection And Ranging) illuminates a target with light and can detect the distance, direction, speed, temperature, material distribution, and concentration characteristics to the object.

[0004] Lidar was initially utilized for purposes such as weather observation and distance measurement, but recently, it is being researched for autonomous driving and unmanned valet parking.

[0005] LiDAR includes a light output module that irradiates light onto an object and a light receiving module that detects incident light reflected from the object. However, conventional light output modules have a problem in that the angle of view is fixed depending on the shape of the lens. Furthermore, when a camera module with an autofocus (AF) function or an optical image stabilization (OIS) function is applied to the light output module, the amount of displacement in the angle of view is minimal, which poses a problem. Additionally, in this case, it is also problematic because it is vulnerable to impact. The problem to be solved

[0007] The present invention is proposed to improve upon the aforementioned problems and aims to provide a lidar capable of implementing a wide field of view (FOV) while reducing the lens size. means of solving the problem

[0009] A lens driving device according to the present embodiment comprises: a first housing to which a first lens part is coupled; a second housing to which a second lens part is coupled; a first driving part disposed in the first housing; a second driving part disposed facing the first driving part; a third driving part disposed in the second housing; and a fourth driving part disposed facing the third driving part, wherein the first housing has a longitudinal direction in a first direction and the first driving part is disposed at each end, and the second housing has a longitudinal direction in a second direction perpendicular to the first direction and the third driving part is disposed at each end.

[0010] A light output module according to the present embodiment comprises: a first housing to which a first lens portion is coupled; a substrate disposed below the first lens portion and having a light source disposed on its upper surface; a second housing to which a second lens portion is coupled; a first driving portion disposed in the first housing; a second driving portion disposed facing the first driving portion; a third driving portion disposed in the second housing; and a fourth driving portion disposed facing the third driving portion, wherein the first housing has a longitudinal direction in a first direction and the first driving portion is disposed at each end, and the second housing has a longitudinal direction in a second direction perpendicular to the first direction and the third driving portion is disposed at each end.

[0011] A lidar according to the present embodiment includes a light output module that irradiates light onto an area to be irradiated, and a light receiving module that detects light irradiated from the light output module and reflected from the area to be irradiated. The light output module includes: a first housing to which a first lens portion is coupled; a substrate disposed below the first lens portion and having a light source disposed on its upper surface; a second housing to which a second lens portion is coupled; a first driving unit disposed in the first housing; a second driving unit disposed facing the first driving unit; a third driving unit disposed in the second housing; and a fourth driving unit disposed facing the third driving unit. The first housing has a longitudinal direction in a first direction, and the first driving unit is disposed at each end of the first housing, and the second housing has a longitudinal direction in a second direction perpendicular to the first direction, and the third driving unit is disposed at each end of the second housing. Effects of the invention

[0013] This embodiment has the advantage of enabling scanning of the light source.

[0014] In addition, as the lens size is reduced, the overall length of the lens drive unit can be reduced, a wide field of view can be achieved, and there are advantages such as the ability to adjust the field of view along the X and Y axes.

[0015] In addition, since the first holder and the second holder can move individually through separate driving units, there is an excellent effect in terms of stability. Brief explanation of the drawing

[0017] FIG. 1 is a perspective view of a lidar according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing the internal configuration of a lidar according to an embodiment of the present invention. FIG. 3 is an exploded perspective view of a lidar according to an embodiment of the present invention. FIG. 4 is a perspective view of an actuator according to an embodiment of the present invention. FIG. 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 X1-X2 of FIG. 4. FIG. 7 is a cross-sectional view showing the lower surface of an actuator body according to an embodiment of the present invention. FIG. 8 is a cross-sectional view showing Y1-Y2 of FIG. 4. FIG. 9 is a cross-sectional view showing the upper surface of an actuator body according to an embodiment of the present invention. FIG. 10 is a cross-sectional view illustrating a position sensing structure according to an embodiment of the present invention. FIG. 11 is a cross-sectional view showing an example of deformation of a metal part and a coil part according to the present invention. FIG. 12 is a reference diagram illustrating the operation of an optical output module according to an embodiment of the present invention. Specific details for implementing the invention

[0018] Hereinafter, some embodiments of the present invention will be described with reference to exemplary drawings. In labeling the components of each drawing, the same components are indicated by the same reference numeral whenever possible, even if they are shown in different drawings.

[0019] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by these terms. Where it is stated that a component is 'connected,' 'combined,' or 'connected' to another component, it should be understood that while the component may be directly connected, combined, or connected to the other component, another component may also be 'connected,' 'combined,' or 'connected' between the component and the other component.

[0020] In the following, any one of the first magnet, the first coil, the second magnet, and the second coil may be referred to as the "first driving part," another as the "second driving part," yet another as the "third driving part," and the remaining one as the "fourth driving part." 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.

[0021] The configuration of the lidar according to the present embodiment is described below.

[0022] The LiDAR (Light Detection And Ranging) according to the present embodiment irradiates light toward a target and can detect the distance, direction, speed, temperature, material distribution, and concentration characteristics to the object.

[0023] Lidar can be utilized for purposes such as weather observation or distance measurement. In addition, Lidar can be used for autonomous driving and unmanned valet parking.

[0024] The lidar according to the present embodiment may include a light output module and a light receiving module. The lidar may include a light output module that irradiates light onto an area to be irradiated. The lidar may include a light receiving module that detects light irradiated from the light output module and reflected from the area to be irradiated.

[0025] 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 may be manufactured by replacing the light source in the light output module with a light receiving sensor. Additionally, the heat dissipation member may be omitted in the light receiving module. The description of the substrate, heat dissipation member, and lens driving device of the light receiving module may be applied by analogy 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. The light receiving sensor may detect infrared light, for example. However, it is not limited thereto.

[0026] The light output module can irradiate light onto the area to be irradiated. The light output module may include a laser diode. The light output module may irradiate infrared light, for example, but is not limited thereto.

[0027] The configuration of a LiDAR including a light output module according to an embodiment of the present invention is described below.

[0028] FIG. 1 is a perspective view of a lidar according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing the internal configuration of a lidar according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view of a lidar according to an embodiment of the present invention.

[0029] Referring to FIGS. 1 to 3, the lidar (100) according to an embodiment of the present invention has an external shape formed by a case (10). The case (10) is formed in a roughly rectangular shape, and a space is formed inside to accommodate electronic components for driving the lidar (100).

[0030] The above 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 the coupling of the covers (19, 70) and the case body (10a). Alternatively, the case (20) and the covers (19, 70) can be formed integrally to form an internal space.

[0031] In the internal space of the above case (10), a light output module (20) that irradiates light to an area to be irradiated and a light receiving module (30) that detects light reflected from the area to be irradiated are disposed. The light output module (20) and the light receiving module (30) can irradiate or receive light to the inside and outside of the above case (10) through glass (21, 31) formed on the upper cover (70).

[0032] In detail, the light output module (20) and the light receiving module (30) are arranged adjacent to each other inside the case (10). A separate partition (11a) may be arranged between the light output module (20) and the light receiving module (30). The light output module (20) and the light receiving module (30) may be covered by the glass (21, 31) of the upper cover (70). The glass (21, 31) is formed of a transparent material so that light can pass through. More specifically, the glass (21, 31) may include a light output glass (31) arranged in the light emission direction of the light output module (20) to allow light irradiated from the light output module (20) to pass to the outside, and a light receiving glass (21) arranged facing the light receiving area of ​​the light receiving module (20) to allow light reflected from the irradiated area to pass inside. The light incident from the light receiving glass (21) above can be incident on the light receiving lens (32, 33) to be described later.

[0033] The material of the above glass (21, 31) may be transparent plastic to block visible light.

[0034] 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 with a curved shape in which the central part protrudes. Also, the glass (21, 31) coupled to the upper cover (70) may also be formed with a curved shape to form a sense of unity with other areas of the upper cover (70).

[0036] *30. Referring to Figures 2 and 3, the lidar (10) includes the light output module (20) and the light receiving module (30).

[0037] The above light receiving module (30) may include light receiving lenses (32, 33). The light receiving lenses (32, 35) may include a first light receiving lens (32) and a second light receiving lens (33) located below the first light receiving lens (32).

[0038] The light receiving lenses (32, 33) are positioned below the light receiving glass (31) within the internal space of the case (10). A lens receiving groove (30a) for receiving the light receiving lenses (32, 33) is formed on the upper surface of the case body (10a). The lens receiving groove (30a) is formed by being recessed downward from the upper surface of the case body (10a) to receive the light receiving lenses (32, 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, 33).

[0039] The light receiving lenses (32, 33) may be positioned on the upper side of the light receiving substrate (35). The second light receiving lens (33), which is positioned relatively lower among the light receiving lenses (32, 33), is electrically connected to the light receiving substrate (35), so that a signal through light incident from the light receiving lenses (32, 33) can be input to the light receiving substrate (35).

[0040] Among the light receiving lenses (32, 33), the first light receiving lens (52), which is positioned relatively higher, may have a curved shape with a central part protruding upward. Therefore, light reflected from the irradiated area can be easily incident on the first light receiving lens (32). Also, the second light receiving lens (33) may be a condensing lens. Furthermore, the upper surface of the light receiving lenses (32, 33) may be positioned relatively lower than the upper surface of the third lens part (130) to be described later. That is, the area of ​​the light receiving lenses (32, 33) exposed to the outside is formed with a vertical length lower than that of the third lens part (130). As a result, light reflected from the irradiated area can be easily incident on the light receiving module (30) rather than the light output module (20).

[0041] A separate substrate (16, 18) may be additionally disposed on the lower side of the optical receiving substrate (35) and the optical output module (20). The optical receiving substrate (35) and the separate substrate (16, 18) may be joined through fixing screws disposed on both sides facing each other. Additionally, the optical receiving substrate (35) and the separate substrate (16, 18) may be electrically connected by a separate connecting substrate (17) disposed on both sides spaced apart from the fixing screws.

[0042] The separate boards (16, 18) may include a control board (18) for inputting control commands for the optical output module (20) and the optical receiving module (30), and a power board (16) disposed on the upper side of the control board (18) for providing power to the optical output module (20) and the optical receiving module (30). Accordingly, the separate boards (16, 18) can transmit control commands necessary for driving the lidar (10) or provide power to each module (20, 30).

[0043] Below, the configuration of the above-mentioned light output module (20) will be described.

[0044] FIG. 4 is a perspective view of an actuator according to an embodiment of the present invention, FIG. 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 X1-X2 of FIG. 4, FIG. 7 is a cross-sectional view showing the lower surface of an actuator body according to an embodiment of the present invention, FIG. 8 is a cross-sectional view showing Y1-Y2 of FIG. 4, and FIG. 9 is a cross-sectional view showing the upper surface of an actuator body according to an embodiment of the present invention.

[0045] Referring to FIGS. 2 to 9, the light output module (20) according to the present embodiment may include a substrate (50), a light source (52), and a lens driving device. However, in the light output module according to the present embodiment, one or more of the substrate (50), the light source (52), and the lens driving device may be omitted or changed.

[0046] The above substrate (50) may be coupled with the light source (52). The above substrate (50) may be electrically connected to the light source (52). In this case, the above substrate (50) may supply the current necessary for driving the light source (52). The light source (52) may be coupled to the upper surface of the above substrate (50). Heat dissipation fins (not shown) may be coupled to the upper and lower surfaces of the above substrate (50). The above substrate (50) may be, for example, a printed circuit board (PCB). However, it is not limited thereto. In addition, the above substrate (50) may be electrically connected to the power supply board (16) or control board (18) placed on the lower side.

[0047] The light source (52) may be located on the lower side of the lens unit (101). The light source (52) may be located on the lower side of the first lens part (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. The light source (52) may irradiate infrared light as an example. However, it is not limited thereto.

[0048] The lens driving device may include a lens unit (101) and an actuator (200). However, in the lens driving device according to the present embodiment, one or more of the lens unit (101) and the actuator (200) may be omitted or changed.

[0049] The lens unit (101) may be positioned to overlap with the light source (52) mounted on the substrate (50). Through such a structure, light emitted from the light source (52) may 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 that fixes the plurality of lenses. The lens unit (101) may be composed of a total of six lenses. The lens unit (101) may include first to sixth lenses (111, 112, 121, 122, 131, 132). At this time, at least one of the first to sixth lenses (111, 112, 121, 122, 131, 132) may be an aspherical lens. Alternatively, all of the first to sixth lenses (111, 112, 121, 122, 131, 132) may be aspherical lenses.

[0050] The field of view (FOV) of the lens unit (101) may be 135 degrees to 145 degrees. The field of view of the lens unit (101) may be formed by the actuator (200). That is, the field of view of the lens unit (101) may be secured by the actuator (200) moving at least a part of the lens unit (101).

[0051] The above lens unit (101) may include a first lens part (110), a second lens part (120), and a third lens part (130). However, in the above lens unit (101), one or more of the third lens part (130), the second lens part (120), and the first lens part (110) may be omitted or changed.

[0052] The lens unit (101) may include the third lens portion (130). At least a portion of the third lens portion (130) may be exposed upward. The lens unit (101) may include a second lens portion (120) located below the third lens portion (130). The lens unit (101) may include a first lens portion (110) located below the second lens portion (120).

[0053] The third lens unit (130), the second lens unit (120), and the first lens unit (110) may be arranged sequentially from the upper side to the lower side. At this time, a light source (420) may be located on the lower side of 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 reversed order.

[0054] At least a portion of the third lens portion (130) may be received in the holder unit (500). The center of the third lens portion (130) may be exposed to the outside. The center of the third lens portion (130) may be exposed to the upper side. The periphery of the third lens portion (130) may be received by the holder unit (500).

[0055] The third lens section (130) may include a fifth lens (131), a sixth lens (132), and a third lens barrel (133). However, in the third lens section (130), one or more of the fifth lens (131), the sixth lens (132), and the third lens barrel (133) may be omitted or changed.

[0056] The third lens portion (130) may include the sixth lens (132) located at the uppermost side. The third lens portion (130) may include the fifth lens (131) located below the sixth lens (132).

[0057] At least a portion of the sixth lens (132) may be accommodated in the holder unit (500). The sixth lens (132) may be positioned below the light output glass (31).

[0058] The center of the sixth lens (132) may be exposed upward. The periphery 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, 131).

[0059] Meanwhile, the protrusion height of the lens protruding upward from the case in the light receiving module (30) may be formed lower than the protrusion height of the lens protruding outward from the light output module (20). For example, the protrusion height of the first light receiving lens (32) may be formed lower than the protrusion height of the sixth lens (132). Accordingly, light irradiated from the light output module (20) may be prevented from being directly received by the light receiving module (30).

[0060] In order to form a high protrusion height of the light output module (20), a stepped portion (25) is formed on the upper surface (10a) of the case (10) to accommodate a portion of the upper side of the light output module (20). The stepped portion (25) is formed to protrude stepwise from the upper surface (10a) of the case (10) to accommodate a portion of the upper side of the light output module (20). Additionally, a hole is formed on the upper surface of the stepped portion (25) to expose the sixth lens (132).

[0061] 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 positioned so that its optical axis coincides with that of the sixth lens (132).

[0062] The third lens barrel (133) can accommodate at least a portion of the sixth lens (132). The third lens barrel (133) can accommodate at least a portion of the sixth lens (132). The third lens barrel (133) can support the outer surface of the sixth lens (132). The third lens barrel (133) can support the outer surface of the sixth lens (132). The third lens barrel (133) can be accommodated inside the holder unit (500).

[0063] The second lens part (120) can be coupled to the actuator (200). The second lens part (120) can be moved by the actuator (200). The second lens part (120) can move in a direction perpendicular to the optical axis of the lens unit (101). At this time, the movement of the second lens part (120) in the direction of the optical axis of the lens unit (101) may be restricted. The upper end of the second lens part (120) can directly contact the third lens part (130). The upper end of the second lens part (120) can support the lower end of the third lens part (130). The lower end of the second lens part (120) can directly contact the first lens part (110). The lower end of the second lens part (120) can be supported by the first lens part (110).

[0064] The second lens unit (120) can move in a first axis direction perpendicular to the optical axis of the lens unit (101). The second lens unit (120) can move in a second axis direction perpendicular to the optical axis of the lens unit (101) and different from the first axis direction. At this time, the first axis direction and the second axis direction may be orthogonal or intersecting. 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) can move 2.8 mm to 3.2 mm in the first axis direction. The second lens unit (120) can move 88 μm to 92 μm in the second axis direction. In this case, the angle of view of the lens unit (101) can be secured to be 135 degrees to 145 degrees.

[0065] Meanwhile, an adjustment hole (11, see FIG. 1) is formed on the side of the case (20) to expose the second lens part (120) in a horizontal direction. The adjustment hole (11) is formed in an area on the side of the case (10) that overlaps horizontally with the second lens part (120), thereby exposing the second lens part (120) to the outside. Accordingly, a worker can adjust the position of the second lens part (120) by inserting a separate tool into the adjustment hole (11).

[0066] The second lens section (120) may include a third lens (121), a fourth lens (122), and a second lens barrel (123). However, in the second lens section (120), one or more of the third lens (121), the fourth lens (122), and the second lens barrel (123) may be omitted or changed.

[0067] The second lens portion (120) may include the fourth lens (122) located below the fifth lens (131). The second lens portion (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 referred to as 'driving lenses'.

[0068] 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) may be moved by the actuator (200). The fourth lens (122) may be positioned 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).

[0069] 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) may be moved by the actuator (200).

[0070] The second lens barrel (123) can accommodate at least a portion of the third lens (121). The second lens barrel (123) can accommodate at least a portion of the fourth lens (122). The second lens barrel (123) can support the outer surface of the third lens (121). The second lens barrel (123) can support the outer surface of the fourth lens (122). The second lens barrel (123) can be accommodated inside the holder unit (500). The second lens barrel (123) can 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) can be supported by the first lens barrel (113). In detail, the second lens barrel (123) can be supported on the first holder part (1130) of the actuator (200).

[0071] 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, the movement of the first lens unit (110) in the direction of the optical axis 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).

[0072] The first lens portion (110) may include the first lens (111), the second lens (112), and the first lens barrel (113). However, in the first lens portion (110), one or more of the first lens (111), the second lens (112), and the first lens barrel (113) may be omitted or changed.

[0073] The first lens portion (110) may include the second lens (112) located below the third lens (121). The first lens portion (110) may include a first lens (111) located below the second lens (112). The first lens portion (110) may include the first lens barrel (113) that accommodates the first lens (111) and the second lens (112).

[0074] 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 by the first lens barrel (113). The second lens (112) may be positioned so that its optical axis aligns with that of 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 referred to as a 'focusing lens'.

[0075] 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 positioned so that its optical axis aligns with that of the second lens (112). The first lens (111) may be a lens for collimating. That is, the first lens (112) may generate parallel light through light irradiated from the light source (52). In this case, the first lens (111) may be referred to as a 'collimating lens'.

[0076] 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) can support the outer surface of the first lens (111). The first lens barrel (113) can support the outer surface of the second lens (112).

[0077] The holder unit (500) can accommodate at least a portion of the lens unit (101). The holder unit (500) can fix the third lens part (130). The holder unit (500) can movably accommodate the second lens part (120) inside. That is, the holder unit (500) can fix the third lens part (130) and the first lens part (110) and movably accommodate the second lens part (120). The holder unit (500) can accommodate an actuator (200) that moves the second lens part (120) inside.

[0078] The actuator (200) may be referred to as a 'Voice Coil Motor (VCM)'. The actuator (200) can move the lens unit (101) coupled to the actuator (200) through electromagnetic interaction.

[0079] The actuator (200) has an external shape formed by the combination of a cover (201) and a base (202). A first housing (230) and a 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). As a result, the cover (201) may form the upper surface of the actuator (200), the base (202) may form the lower surface of the actuator (200), and the actuator body (203) may form the side surface of the actuator (200). Meanwhile, the cover (201) may have an exposure hole (201a) formed therein to expose the second lens part (120) or the first lens part (110) upward.

[0080] The actuator (200) can move the second lens part (120) or the first lens part (110). The actuator (200) can move the second lens part (120) or the first lens part (110) in a direction perpendicular to the optical axis of the lens unit (100). At this time, the movement of the second lens part (120) and the first lens part (110) in the direction of the optical axis may be restricted. Here, the 'optical axis' may be referred to as the 'up-down 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', 'horizontal direction', and 'X-axis / Y-axis direction'. The actuator (200) can move the second lens part (120) in the first axis direction and the first lens part (110) in the second axis direction. At this time, the first axis direction and the second axis direction may meet at an angle. Additionally, the first axis direction and the second axis direction may be orthogonal. 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 part (120) in the X-axis direction and the first lens part (110) in one or more of the Y-axis direction. At this time, the directions of the second lens part (120) and the first lens part (110) may be reversed. That is, the first lens part (110) may be moved in the X-axis direction and the second lens part (120) may be moved in the Y-axis direction.

[0081] The actuator (200) may include a first axis drive unit, a second axis drive unit, and a drive board (1500). However, in the actuator (200), one or more of the first axis drive unit, the second axis drive unit, and the drive board (1500) may be omitted or modified.

[0082] The actuator (200) may include a first axis driving unit that moves the first lens part (110) in the first axis direction. The actuator (200) may include a second axis driving unit that moves the second lens part (120) in the second axis direction.

[0083] The first axis drive unit can move the first lens part (110) in the first axis direction. The first axis drive unit can move the first lens part (110) in the X-axis direction. In this case, the first axis drive unit may be referred to as the 'X-axis drive unit'.

[0084] 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.

[0085] The first axis drive unit may include a first housing (240) to which the first lens portion (110) is coupled. The first housing (240) may be positioned below the actuator body (203) with respect to the actuator body (203). The first housing (240) may be moved in the X-axis direction below the actuator body (203).

[0086] The first housing (230) includes a body (242) in which a lens part coupling hole (245) is formed in the center to which the first lens part (110) is coupled, and a first magnet coupling part (244) extending to both sides of the body (242). A first magnet (254) is disposed in the first magnet coupling part (244) extending opposite each other from the body (242) in which the lens part coupling hole (245) is formed. 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).

[0087] In detail, the first magnet coupling portion (244) is provided in a plurality so as to face each other with the body (242) as the center. Additionally, the first magnet coupling portion (244) may be provided with a first magnet receiving groove (245) that is recessed compared to other areas to accommodate the first magnet (254). At this time, the arrangement direction of the first magnet coupling portion (244) may intersect with the movement direction of the first housing (240). This can be understood as the arrangement direction of the plurality of first magnet coupling portions (244) forming the Y-axis direction when the first housing (240) moves in the X-axis direction.

[0088] The first magnet (254) may be accommodated in the first magnet coupling part (244). The first magnet (254) may be provided in each of the plurality of first magnet coupling parts (244). At this time, the number of first magnets (254) accommodated in one first magnet coupling part (244) may be multiple. For example, in the first housing (240), a pair of first magnets (254) may be arranged in a plurality of first magnet coupling parts (244). The pair of first magnets (254) may have different polarities.

[0089] The first housing coil (264) may be provided in an area facing the first magnet (254). The first housing coil (264) may be electrically connected to the driving board (1500). For example, the first housing coil (264) may be electrically connected to a first coil coupling part (1510) disposed on the driving board (1500).

[0090] The first housing (240) can slide on the lower surface of the actuator body (203). Referring to FIG. 6, a first guide section (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 section (320) may include a guide ball and a guide rail. Accordingly, due to the 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).

[0091] The second axis drive unit can move the second lens part (120) in the second axis direction. The second axis drive unit can move the second lens part (120) in the Y-axis direction. In this case, the second axis drive unit may be referred to as the 'Y-axis drive unit'.

[0092] The second axis drive 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.

[0093] The second axis drive unit may include a second housing (230) to which the second lens part (120) is coupled. The second housing (230) may be positioned above the actuator body (203) with respect to the actuator body (203). The second housing (230) may be moved in the Y-axis direction above the actuator body (203).

[0094] The second housing (240) includes a body (232) in which a lens part coupling hole (231) is formed in the center to which the second lens part (120) is coupled, and second magnet coupling parts (234) extending to both sides of the body (232). A second magnet (252) is disposed in the second magnet coupling parts (234) extending opposite each other from the body (232) in which the lens part coupling hole (231) is formed. 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).

[0095] In detail, the second magnet coupling portion (234) is provided in multiple numbers so as to face each other with respect to the body (232). Additionally, the second magnet coupling portion (234) may be provided with a second magnet receiving groove (235) that is recessed compared to other areas to accommodate the first magnet (252). At this time, the arrangement direction of the second magnet coupling portion (234) may intersect with the movement direction of the second housing (230). This can be understood as the arrangement direction of the multiple second magnet coupling portions (234) forming the X-axis direction when the second housing (230) moves in the Y-axis direction.

[0096] The second magnet (252) may be accommodated in the second magnet coupling part (234). The second magnet (252) may be provided in each of the plurality of the second magnet coupling parts (234). At this time, the number of second magnets (252) accommodated in one second magnet coupling part (234) may be multiple. For example, in the second housing (230), a pair of second magnets (252) may be arranged in multiple second magnet coupling parts (234). The pair of second magnets (252) may have different polarities.

[0097] The second housing coil (262) may be provided in an area facing the second magnet (252). More specifically, the second housing coil (262) may be placed in a 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 placed to face the second magnet (252). The second housing coil (262) may be electrically connected to the driving board (1500). For example, the second housing coil (262) may be electrically connected to a second coil coupling part (1520) placed on the driving board (1500).

[0098] The second housing (230) can slide on the upper surface of the actuator body (203). Referring to FIG. 8, a second guide section (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 section (310) may include a guide ball and a guide rail. Accordingly, due to the 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).

[0099] To explain the operation of the lens driving device according to an embodiment of the present invention, first, the first lens unit (110) can be moved in the X-axis direction by the electromagnetic interaction between the first magnet (254) and the first coil (264). Then, the second lens unit (120) can be moved in the Y-axis direction by the electromagnetic interaction between the second magnet (252) and the second coil (262). Accordingly, 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, a wide field of view can be realized, and the field of view can be adjusted along the X-axis and Y-axis.

[0100] In addition, since the second lens unit (120) and the first lens unit (110) are operated by individual driving, X-axis / Y-axis driving is possible more stably.

[0101] Below, the position sensing structure of the first housing (240) and the second housing (230) will be described.

[0102] FIG. 10 is a cross-sectional view illustrating a position sensing structure according to an embodiment of the present invention.

[0103] Referring to FIGS. 6 to 10, an actuator (200) according to an embodiment of the present invention detects the position and distance of movement of the first housing (240) and the second housing (230) based on the amount of change in inductance due to the movement of the first housing (240) and the second housing (230).

[0104] In detail, the first housing (240) may be provided with a first metal part (274). The first metal part (274) is made of a metal material, and for example, the first metal part (274) may be aluminum (Al). The first metal part (274) may be placed on the lower surface of the first magnet coupling part (244) among the outer surfaces of the first housing (240). The first metal part (274) may be provided only on the lower surface of one of the plurality of first magnet coupling parts (244) arranged on both sides of the first housing (240). Alternatively, the first metal part (274) may be provided on each side of the first housing (240).

[0105] Additionally, a first coil portion (282) for detecting a change in inductance due to the movement of the first metal portion (274) may be provided in the area of ​​the inner surface of the actuator (200) facing the first metal portion (274). The first coil portion (282) may be a coil wound on the upper surface of the first substrate (281). Furthermore, the first substrate (281) extends to the outside of the actuator (200) and is electrically connected to another substrate, thereby allowing position information of the first housing (240) to be transmitted and received.

[0106] One end of the first metal part (274) is formed in a pointed shape such that the cross-sectional area becomes narrower towards the end. The first coil part (282) is wound spirally on the upper surface of the first substrate (281). In some cases, the first coil part (282) may be wound to form a plurality of concentric circles.

[0107] Accordingly, the amount of change in inductance due to the movement of the first metal part (274) as the first housing (240) moves can be detected by the first coil part (282). At this time, by forming the cross-sectional shape of one end of the first metal part (274) into a pointed shape and winding the first coil part (282) in a spiral shape, the amount of change in inductance of the first metal part (274) can be detected more accurately. This is due to setting the shape so that the amount of change in inductance due to the movement of the first housing (240) changes linearly.

[0108] The second housing (230) may be provided with a second metal part (272). The second metal part (272) is made of a metal material, and for example, the second metal part (272) may be aluminum (Al). The second metal part (272) may be placed on the upper surface of the second magnet coupling part (234) among the outer surfaces of the second housing (230). The second metal part (272) may be provided only on the upper surface of one of the first magnet coupling parts (234) among the plurality of second magnet coupling parts (234) arranged on both sides of the second housing (230). Alternatively, the second metal part (272) may be provided on each side of the second housing (230).

[0109] Additionally, a second coil portion (284) for detecting a change in inductance due to the movement of the second metal portion (272) may be provided in the area of ​​the inner surface of the actuator (200) facing the second metal portion (272). The second coil portion (284) may be a coil wound on the lower surface of the second substrate (285). Furthermore, the second substrate (285) extends to the outside of the actuator (200) and is electrically connected to another substrate, thereby allowing position information of the second housing (240) to be transmitted and received.

[0110] One end of the second metal part (272) is formed in a pointed shape such that the cross-sectional area becomes narrower towards the end. The second coil part (284) is wound spirally on the lower surface of the second substrate (285). In some cases, the second coil part (284) may be wound to form a plurality of concentric circles.

[0111] Accordingly, the amount of change in inductance due to the movement of the second metal part (272) as the second housing (230) moves can be detected by the second coil part (284). At this time, similarly, the amount of change in inductance due to the movement of the second housing (230) can be detected as changing linearly according to the cross-sectional shape of the second metal part (272) and the second coil part (284).

[0112] FIG. 11 is a cross-sectional view showing an example of deformation of a metal part and a coil part according to the present invention.

[0113] The coil portion (600) illustrated in FIG. 11 is a modified example of the first coil portion (282) or the second coil portion (284) described above, and the metal portion (472) is understood as a modified example of the first metal portion (274) and the second metal portion (272).

[0114] Referring to FIG. 11, the coil portion (600) may be formed in a stepped shape on one side of the substrate (610) to form mutually constant spacing (620) along the direction of movement of the first housing (240) and the second housing (230). For example, the cross-sectional shape of the coil portion (600) may be a stepped pyramid shape.

[0115] In this case, the cross-section of the metal part (472) may be formed in a rectangular shape. In the case of the rectangular metal part (472), when facing the stepped coil part (600), the inductance of the metal part (472) can be linearly detected in the coil part (600), so the positions of the first housing (240) and the second housing (230) can be accurately detected.

[0116] In addition, if the cross-sectional shape of the coil part (600) is formed as 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 part, thus having the advantage of reducing the number of parts.

[0117] The operation of an optical output module according to an embodiment of the present invention will be described below with reference to the drawings.

[0118] FIG. 12 is a reference diagram illustrating the operation of an optical output module according to an embodiment of the present invention.

[0119] In this embodiment, the third lens part (130) and the light source (52) are fixed to the substrate (50). However, the first lens part (110) and the second lens part (120) can move in the X-axis direction or the Y-axis direction, respectively, with respect to the substrate (50).

[0120] Here, the movement of the first lens part (110) is described as being limited to the X-axis direction and the movement of the second lens part (120) as being limited to the Y-axis direction, but the second lens part (120) may move in the X-axis direction and the first lens part (110) may move in the Y-axis direction. In addition, each lens part (110, 120) may move in three or more directions.

[0121] The light output module according to the present embodiment can irradiate light at the point marked as 'start' in FIG. 12. Subsequently, the first driving unit moves the first lens part (110) by a second distance (L2) in a first direction parallel to the X-axis (see A in FIG. 12). More specifically, 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), causing the first housing (240) on which the first lens part (110) is placed to move integrally in the first direction. The second housing (230) is fixed.

[0122] Subsequently, the second driving unit moves the second lens part (120) by a first distance (L1) in a second direction parallel to the Y-axis direction (B). More specifically, 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), causing the second housing (230) on which the second lens part (120) is placed to move as a whole in the second direction.

[0123] Afterward, the first axis drive unit moves the first lens part (110) by 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 part (110) is placed moves as a whole.

[0124] Afterward, the second axis drive unit moves the second lens part (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) containing the second lens part (120) moves as a whole in the second direction.

[0125] Afterwards, as described above, the first axis drive unit and the second axis drive unit operate alternately to move the second lens part (120) or the first lens part (110) (see E, F, G of FIG. 7).

[0126] Afterward, the second axis driving unit moves the first lens unit (110) by three times the first distance (L1) in the fourth direction opposite to the second direction (H). As a result, 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) can be performed at a frequency of 20 Hz. 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 the present embodiment may be 0.6 mm. Also, the second distance (L2) may be 4 mm. That is, the X-axis displacement of the optical output module according to the present embodiment may be 4 mm.

[0127] However, the movement of the first lens part (110) and the second lens part (120) described above is exemplary and can be modified in various ways. Additionally, since the movement of either the first lens part (110) or the second lens part (120) does not affect the other lens part, each lens part can be driven individually and independently.

[0128] In the foregoing, although all components constituting an embodiment of the present invention have been described as being combined or operating in combination, the present invention is not necessarily limited to such embodiments. That is, within the scope of the purpose of the present invention, all components may be selectively combined in one or more ways to operate. Furthermore, terms such as "include," "constitute," or "have" described above, unless specifically stated otherwise, mean that the relevant component may be inherent; thus, they should be interpreted as allowing for the inclusion of additional components rather than excluding other components. All terms, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains, unless otherwise defined. Terms commonly used, such as those defined in advance, should be interpreted in accordance with their meaning in the context of the relevant technology and should not be interpreted in an ideal or overly formal sense unless explicitly defined in the present invention.

[0129] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

Claims

Claim 1 A first housing to which a first lens part is coupled; a second housing to which a second lens part is coupled; an actuator body disposed between the first housing and the second housing; a first guide part disposed between the upper surface of the first housing and the lower surface of the actuator body to guide the movement of the first housing; a second guide part disposed between the lower surface of the second housing and the upper surface of the actuator body to guide the movement of the second housing; a first driving part disposed in the first housing; a second driving part disposed facing the first driving part; and a third driving part disposed in the second housing. A lens driving device comprising a fourth driving unit positioned opposite the third driving unit, wherein the first housing has a longitudinal direction in a first direction and the first driving unit is positioned at each end, and the second housing has a longitudinal direction in a second direction perpendicular to the first direction and the third driving unit is positioned at each end. Claim 2 A lens driving device according to claim 1, wherein the first driving unit and the third driving unit are each magnets, and the second driving unit and the fourth driving unit each include a pair of coils formed such that the first driving unit and the second driving unit are coupled between them. Claim 3 A lens driving device according to claim 1, wherein the first housing moves in the second direction and the second housing moves in the first direction. Claim 4 A lens driving device according to claim 1, comprising: a first metal part disposed in the first housing; a first coil part disposed facing the first metal part; a second metal part disposed in the second housing; and a second coil part disposed facing the second metal part. Claim 5 In claim 4, the position and distance information of the first housing or the second housing is a lens driving device detected based on the amount of change in inductance due to the movement of the first housing or the second housing. Claim 6 A lens driving device according to claim 4, comprising a first plate on which the first coil portion is wound and a second substrate on which the second coil portion is wound. Claim 7 A lens driving device according to claim 4, wherein the cross-sectional shape of the first metal part or the second metal part is formed at one end in a pointed shape, and the first coil part or the second coil part is wound spirally. Claim 8 A lens driving device according to claim 4, wherein the cross-sectional shape of the first metal part or the second metal part is formed as a rectangular shape, and the cross-sectional shape of the first coil part or the second coil part is formed as a stepped pyramid shape. Claim 9 A lens driving device according to claim 1, wherein the first direction and the second direction are each directions perpendicular to the optical axis of the first lens part and the second lens part. Claim 10 delete Claim 11 A first housing to which a first lens part is coupled; a substrate disposed below the first lens part, on which a light source is disposed on its upper surface; a second housing to which a second lens part is coupled; an actuator body disposed between the first housing and the second housing; a first guide part disposed between the upper surface of the first housing and the lower surface of the actuator body to guide the movement of the first housing; a second guide part disposed between the lower surface of the second housing and the upper surface of the actuator body to guide the movement of the second housing; a first driving part disposed in the first housing; a second driving part disposed facing the first driving part; and a third driving part disposed in the second housing. An optical output module comprising a fourth driving unit positioned opposite the third driving unit, wherein the first housing has a longitudinal direction in a first direction and the first driving unit is positioned at each end, and the second housing has a longitudinal direction in a second direction perpendicular to the first direction and the third driving unit is positioned at each end. Claim 12 The apparatus includes a light output module that irradiates light onto an area to be irradiated, and a light receiving module that detects light irradiated from the light output module and reflected from the area to be irradiated. The light output module comprises: a first housing to which a first lens portion is coupled; a substrate disposed below the first lens portion, on which a light source is disposed on its upper surface; a second housing to which a second lens portion is coupled; an actuator body disposed between the first housing and the second housing; a first guide portion disposed between the upper surface of the first housing and the lower surface of the actuator body to guide the movement of the first housing; a second guide portion disposed between the lower surface of the second housing and the upper surface of the actuator body to guide the movement of the second housing; a first driving portion disposed in the first housing; a second driving portion disposed facing the first driving portion; and a third driving portion disposed in the second housing. A lidar comprising a fourth drive unit positioned opposite the third drive unit, wherein the first housing has a longitudinal direction in a first direction and the first drive unit is positioned at each end, and the second housing has a longitudinal direction in a second direction perpendicular to the first direction and the third drive unit is positioned at each end.

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