WO2022217514A1 - 光圈装置、具备光圈装置的摄像头模块、电子设备 - Google Patents

光圈装置、具备光圈装置的摄像头模块、电子设备 Download PDF

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Publication number
WO2022217514A1
WO2022217514A1 PCT/CN2021/087304 CN2021087304W WO2022217514A1 WO 2022217514 A1 WO2022217514 A1 WO 2022217514A1 CN 2021087304 W CN2021087304 W CN 2021087304W WO 2022217514 A1 WO2022217514 A1 WO 2022217514A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
rotor
optical axis
aperture
lens
Prior art date
Application number
PCT/CN2021/087304
Other languages
English (en)
French (fr)
Inventor
宇野勝
Original Assignee
北京小米移动软件有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to JP2021531251A priority Critical patent/JP7367022B2/ja
Priority to EP21927049.3A priority patent/EP4137886A4/en
Priority to US17/908,873 priority patent/US20230384650A1/en
Priority to PCT/CN2021/087304 priority patent/WO2022217514A1/zh
Priority to CN202180001327.9A priority patent/CN115516373A/zh
Publication of WO2022217514A1 publication Critical patent/WO2022217514A1/zh

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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/006Control of exposure by setting shutters, diaphragms or filters, separately or conjointly setting of both diaphragm and distance
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00Exposure-making shutters; Diaphragms
    • G03B9/02Diaphragms
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/005Diaphragms
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00Exposure-making shutters; Diaphragms
    • G03B9/02Diaphragms
    • G03B9/04Single movable plate with two or more apertures of graded size, e.g. sliding plate or pivoting plate

Definitions

  • the present invention relates to a diaphragm device mounted on a camera module for changing the amount of light incident on a lens, a camera module including the diaphragm device, and electronic equipment.
  • camera modules built into electronic devices are equipped with an aperture device that adjusts the amount of light incident on a lens (a lens through which light reaching the imaging element passes) according to a specified aperture value. amount of light.
  • a diaphragm device there is known, for example, a device disclosed in Japanese Patent Application Laid-Open No. 2007-156283, which includes two diaphragm blades capable of relative sliding while overlapping each other and an actuator. , the actuator transmits power to one aperture blade.
  • the two aperture blades are respectively formed with concave portions.
  • the two diaphragm blades are overlapped so as to form a diaphragm opening (an opening for passing the light reaching the lens) in the recesses of each other.
  • the actuator is configured to transmit power to one of the diaphragm blades, and is configured to move the other of the diaphragm blades in conjunction with the one of the diaphragm blades when the one of the diaphragm blades moves.
  • the aperture device thus constructed, if the two aperture blades are made to slide relative to each other and the size of the aperture opening is increased, the amount of light incident on the lens can be increased. The amount of light incident on the lens can be reduced.
  • an object of the present invention is to provide a diaphragm device, a camera module including the diaphragm device, and an electronic apparatus that can appropriately set the amount of light incident on a lens in view of such a situation.
  • the aperture device of the present invention sets the amount of light incident on the lens of the camera module, and includes:
  • an aperture plate including a shielding region shielding incident light to the lens
  • an arrangement changing mechanism that changes the arrangement of the diaphragm plate to a diaphragm position and a retracted position, the diaphragm position being on the lens, and the center of the diaphragm opening being arranged in a position corresponding to the optical axis of the lens A position in position, the retracted position is a position retracted from the lens.
  • the configuration changing mechanism may be configured to have:
  • a rotor capable of rotating in the circumferential direction of the optical axis centered on the optical axis
  • a moving structure that moves the diaphragm plate to the diaphragm position or the retracted position according to the rotation of the rotor
  • the mobile structure has:
  • a connecting shaft which is in the shape of a shaft, is arranged in a posture in which the axis center is aligned with the direction of the optical axis in which the optical axis extends, and the arrangement position is in a fixed state, and is rotatably connected to the rod portion;
  • a guide portion for causing the operation portion to move toward one side of the optical axis radial direction that is orthogonal to each of the optical axis circumferential direction and the optical axis direction, or Move the other side.
  • the guide portion may be a guide groove formed in the rotor.
  • the aperture device of the present invention can be configured as:
  • the arrangement changing mechanism has a drive source for rotating the rotor in the circumferential direction of the optical axis.
  • the aperture device of the present invention can be configured as:
  • the arrangement changing mechanism has a holding structure for fixing the arrangement position of the rotor at a position where the center of the rotor itself coincides with the center of the lens.
  • the aperture device of the present invention includes two sets of aperture units in which the aperture plate, the lever portion, the connecting shaft, the operating portion, and the guide portion are formed as a set;
  • the rotor In an open state in which the diaphragm plate of the one diaphragm unit and the diaphragm plate of the other diaphragm unit are arranged at the retracted positions, the rotor may be configured to be directed toward the light beam.
  • the shaft rotates on one side in the circumferential direction of the optical axis
  • the diaphragm plate of the one diaphragm unit moves to the diaphragm position
  • the rotor moves to the other side in the circumferential direction of the optical axis.
  • the diaphragm plate of the other diaphragm unit moves to the diaphragm position.
  • the one diaphragm unit and the other diaphragm unit may be arranged symmetrically with respect to the center of the rotor.
  • the aperture device of the present invention can be configured as:
  • the diaphragm plate of the other diaphragm unit is formed with a diaphragm opening having a diameter different from that of the diaphragm opening of the diaphragm plate of the one diaphragm unit, or no diaphragm opening is formed.
  • the camera module of the present invention includes any one of the above-described aperture devices.
  • the electronic apparatus of the present invention includes any one of the above-described aperture devices.
  • the aperture device As described above, according to the aperture device, the camera module including the aperture device, and the electronic device of the present invention, it is possible to achieve an excellent effect of appropriately setting the amount of light incident on the lens.
  • FIG. 1 is an external view of a diaphragm device according to an embodiment of the present invention.
  • FIG. 2 is a diagram schematically showing an exploded state of the aperture device according to the same embodiment.
  • FIG 3 is a plan view of the aperture device according to the same embodiment, and is a plan view of a state in which the cover is removed.
  • FIG. 4 is a plan view of the aperture device according to the same embodiment, and is a plan view of a state in which a rotor and a structure on the rotor are removed.
  • FIG. 5 is a cross-sectional view at a position corresponding to the line V-V in FIG. 4 .
  • FIG. 6 is a plan view of a piezoelectric element of the aperture device according to the same embodiment.
  • 7A is an explanatory diagram of a piezoelectric element of the aperture device according to the same embodiment, and is an explanatory diagram of a state in which electric power is applied to the first region.
  • 7B is an explanatory diagram of the piezoelectric element of the aperture device according to the same embodiment, and is an explanatory diagram of a state in which application of electric power to the first region is stopped.
  • 8A is an explanatory diagram of a piezoelectric element of the aperture device according to the same embodiment, and is an explanatory diagram of a state in which electric power is applied to the second region.
  • 8B is an explanatory diagram of the piezoelectric element of the aperture device according to the same embodiment, and is an explanatory diagram of a state in which application of electric power to the second region is stopped.
  • 9A is an operation explanatory diagram of the diaphragm device of the same embodiment, and is an operation explanatory diagram of a state in the middle of moving one diaphragm plate from the retracted position to the diaphragm position.
  • 9B is an operation explanatory diagram of the diaphragm device of the same embodiment, and is an operation explanatory diagram of a state in which one diaphragm plate is moved from the retracted position to the diaphragm position.
  • 10A is an operation explanatory diagram of the diaphragm device of the same embodiment, and is an operation explanatory diagram of a state in the middle of moving the other diaphragm plate from the retracted position to the diaphragm position.
  • 10B is an operation explanatory diagram of the diaphragm device of the same embodiment, and is an operation explanatory diagram of a state in which the other diaphragm plate is moved from the retracted position to the diaphragm position.
  • FIG. 11 is an explanatory diagram of a diaphragm device according to another embodiment of the present invention.
  • the aperture device is mounted on a camera module 1 incorporated in an electronic device (eg, a smartphone, a tablet computer, etc.).
  • an electronic device eg, a smartphone, a tablet computer, etc.
  • the aperture device 2 can be attached to a lens unit 5 including a lens 50 that allows light reaching the imaging element to pass therethrough and is configured to change the amount of light (incident light) incident on the lens 50 in accordance with a set aperture value.
  • the lens unit 5 includes: the lens 50 ; a housing 51 that accommodates the lens 50 ; and a power receiving unit 52 that is attached to the housing 51 and receives power supply from the outside (refer to Fig. 5).
  • a focus control unit for adjusting the focus of the lens 50 can be incorporated in the housing 51 , and power can be supplied to the focus control unit via the power reception unit 52 .
  • the direction in which the optical axis of the lens 50 extends is referred to as the optical axis direction
  • the circumferential direction centered on the optical axis of the lens 50 is referred to as the optical axis circumferential direction
  • the optical axis is referred to as the optical axis direction
  • a direction orthogonal to the axial direction and the circumferential direction of the optical axis is referred to as the radial direction of the optical axis.
  • the aperture device 2 of the present embodiment includes an aperture plate 3 for changing the amount of light incident on the lens 50 , and an arrangement changing mechanism 4 for changing the arrangement of the aperture plate 3 to the aperture position and a retracted position, which is a position on the lens 50 and the center of the aperture opening is arranged at a position that coincides with the optical axis of the lens 50, and the retracted position is a position from the The retracted position on the lens 50 .
  • the diaphragm position of the diaphragm plate 3 is a position where the center of the diaphragm plate 3 (the center of the diaphragm opening) and the center of the optical axis of the lens 50 are aligned in plan view (see FIG. 3 ).
  • the retracted position of the diaphragm plate 3 is a position in which the entire diaphragm plate 3 is disposed outside the lens 50 in the radial direction of the optical axis in plan view (see FIGS. 9B and 10B ).
  • the aperture plate 3 is formed in a flat plate shape (alternatively, in the present embodiment, in a circular plate shape).
  • the aperture plate 3 includes a shielding region 30 that shields light incident on the lens 50 in a state of being arranged on the lens 50 .
  • the shielding region 30 is formed in an annular shape.
  • the aperture device 2 of the present embodiment includes two aperture plates 3 .
  • the diameter of the diaphragm opening 31 formed in the one diaphragm plate 3 is different from the diameter of the diaphragm opening 31 formed in the other diaphragm plate 3 . That is, the two diaphragm plates 3 are formed with different aperture values, respectively.
  • the arrangement changing mechanism 4 includes a base 40 fixed to the lens unit 5 (housing 51 ), and a rotor 41 arranged on the base 40 and rotatable in the circumferential direction of the optical axis
  • the driving source 42 which is used to rotate the rotor 41 in the circumferential direction of the optical axis; the holding structure 43, which is used to fix the arrangement position of the rotor 41 at a predetermined position (the center of the rotor 41 itself is consistent with the center of the lens 50).
  • the moving mechanism 44 which is linked with the rotation of the rotor 41 to move the diaphragm plate 3 to the diaphragm position or the retracted position; and the cover 45, which covers the base 40, the rotor 41, the driving source 42, the holding structure 43, And the moving mechanism 44 .
  • the base 40 is annular.
  • the base 40 is fixed to the casing 51 in a state of being placed on the casing 51 .
  • the front end portion of the lens 50 is inserted through the center portion of the base 40 .
  • the rotor 41 is formed in an annular shape.
  • the central axis of the rotor 41 is arranged at a position corresponding to the optical axis. Therefore, the rotation center of the rotor 41 is set at a position corresponding to the optical axis.
  • the rotor 41 of the present embodiment has an annular annular plate portion 410 and an annular cylindrical portion 411 protruding downward from the lower surface of the central portion of the annular plate portion 410 .
  • One plate surface of the annular plate portion 410 is disposed toward the upper side in the optical axis direction (the direction corresponding to the upper direction in FIG. 2 ), and the other plate surface of the annular plate portion 410 is disposed toward the lower side in the optical axis direction (Fig. 2 in the corresponding orientation of the lower part) configuration.
  • the front end portion of the lens 50 is inserted through the annular cylindrical portion 411 .
  • the annular cylindrical portion 411 is configured to receive the drive source 42 and the holding structure 43 on the outer peripheral surface.
  • the driving source 42 includes: a piezoelectric element 420, which is arranged on the lower side of the annular plate portion 410 and from the outside toward the inside (towards the annular cylindrical portion 411) on the optical axis diameter; A connecting part 421, which is attached to the front end of the piezoelectric element 420 and abuts against the rotor 41; an attaching part 422, which attaches the piezoelectric element 420 to the base 40; and a power supply part 423 (refer to FIG. 5), which supplies the transmission Power to the piezoelectric element 420.
  • the piezoelectric element 420 includes four regions arranged in two rows and two columns, and a pair of regions 4200 and 4201 facing each other are regions of the same type.
  • Electric power is applied to one pair of opposing regions (hereinafter referred to as first regions) 4200 and the other opposing pair of regions (hereinafter referred to as second regions) 4201 at different timings.
  • each of the second regions 4201 maintains the original shape, so the front end portion of the piezoelectric element 420 It enters with a locus (arc-shaped locus) that curves forward and to one side in the width direction.
  • the tip portion of the piezoelectric element 420 returns to the original position on a trajectory (arc-shaped trajectory) that curves backward and to the other side in the width direction. Location.
  • the contact portion 421 attached to the distal end portion of the piezoelectric element 420 moves along an elliptical trajectory.
  • the respective first regions 4200 maintain the original shape, so the front end portion of the piezoelectric element 420 It enters with a locus (arc-shaped locus) curved forward and on the other side in the width direction.
  • the contact portion 421 attached to the tip portion of the piezoelectric element 420 also moves along the elliptical trajectory.
  • the mounting portion 422 is configured to urge the piezoelectric element 420 inward in the radial direction of the optical axis so that the contacting state between the contact portion 421 and the rotor 41 can be maintained.
  • the power feeding unit 423 of the present embodiment is connected to the power receiving unit 52 (see FIG. 5 ). Therefore, the electric power applied to the piezoelectric element 420 is supplied via the power receiving unit 52 of the lens unit 5 .
  • the holding structure 43 includes an opposing holding portion 430 arranged at a position parallel to the driving source 42 (the piezoelectric element 420 to be described later) in the radial direction of the optical axis, and a side holding portion 431 arranged in the above-mentioned position.
  • the optical axis is deviated from the position of the drive source 42 (piezoelectric element 420 described later) in the circumferential direction.
  • the opposing holding portion 430 includes a ball 4300 which is in contact with the rotor 41 from the outer side in the radial direction of the optical axis, and a receiving portion 4301 which receives the ball 4300 on the outer side in the radial direction of the optical axis.
  • the side holding portion 431 includes a ball 4310 which is in contact with the rotor 41 from the outer side in the radial direction of the optical axis, a cylindrical air cylinder 4311 which is arranged on the outer side of the ball 4310 in the radial direction of the optical axis, and abuts
  • the balls 4300 and 4310 are urged to the rotor 41 by the urging means 4312, which is arranged in the cylinder 4311.
  • the rotor 41 is allowed to move in the radial direction of the optical axis within the range in which the balls 4310 of the side holding portion 431 move in the radial direction of the optical axis, and after moving in the radial direction of the optical axis, the contact application The force of the force unit 4312 returns to the original position.
  • the moving mechanism 44 includes a rod portion 440 extending outward from the outer peripheral edge portion of the aperture plate 3 and a connecting shaft 441 having a shaft shape so as to be parallel to the optical axis direction
  • the posture is arranged in a fixed position, and it is rotatably connected to the rod part 440; on the front end side; and a guide portion 443 for causing the operation portion 442 to move in directions orthogonal to the respective directions of the optical axis circumferential direction and the optical axis direction according to the rotational motion of the rotor 41 in the optical axis circumferential direction.
  • the optical axis moves on one side or the other side in the radial direction.
  • the rod portion 440 of the present embodiment has an elongated thin plate shape, and one end portion in the longitudinal direction is fixed to the aperture plate 3 .
  • connection shaft 441 is configured so that the arrangement position does not change even when the rotor 41 rotates.
  • the connecting shaft 441 of the present embodiment is fixed to the cover 45 and protrudes downward from the lower surface of the cover 45 .
  • the intermediate part between the one end part and the other end part in the longitudinal direction of the rod part 440 is rotatably connected to the connection shaft 441 . Therefore, the lever part 440 can rotate in the circumferential direction (circumferential direction centering on the connecting shaft 441 ) about the position connected to the connecting shaft 441 .
  • the operation portion 442 is formed to protrude from the operation portion 442 toward the rotor 41 .
  • the operation part 442 of this embodiment is formed in a shaft shape.
  • the guide portion 443 is constituted by a guide groove formed so as to open on the upper surface of the rotor 41 .
  • the guide portion 443 will be referred to as a guide groove and described.
  • the guide groove 443 includes an inner guide portion 4430 formed on the central portion side of the rotor 41 (inward in the radial direction of the optical axis), and an outer guide portion 4431 formed closer to the inner guide portion 4430 than the inner guide portion 4430 .
  • the outer peripheral edge portion side of the rotor 41 (the outer side in the radial direction of the optical axis);
  • the inner guide portion 4430 and the outer guide portion 4431 are formed in an arc shape along the circumferential direction of the optical axis.
  • the formation position of the inner guide portion 4430 and the formation position of the outer guide portion 4431 in the optical axis circumferential direction are set so as not to overlap. That is, the inner guide portion 4430 and the outer guide portion 4431 are formed at positions away from each other in the radial direction of the optical axis and the circumferential direction of the optical axis, and the inner guide portion 4430 and the outer guide portion 4431 are connected via the intermediate guide portion 4432 .
  • the operation part 442 is inserted in the guide groove 443 of the present embodiment, and the rotor 41 is configured to rotate relative to the operation part 442 . Therefore, when the position of the guide groove 443 relative to the operation part 442 changes when the rotor 41 rotates, the operation part 442 is pressed by the rotor 41 in the guide groove 443 and moves away from the center of the rotor 41 or close to the rotor 41 . move in the direction of the center.
  • the operating portion 442 constitutes an engaging portion provided on the lever portion 440
  • the guide groove 443 constitutes an engaged portion provided on the rotor 41 and engaged with the operating portion 442
  • the operating portion 442 communicates with the guide groove. 443 is engaged, and the rod portion 440 rotates around the connection shaft 441 in conjunction with the rotation of the rotor 41 .
  • the intermediate guide portion 4432 passes through the position corresponding to the operation portion 442 , and the outer guide portion 4431 reaches the operation portion 442 . corresponding location.
  • the operation part 442 is guided by the intermediate guide part 4432 from the center of the rotor 41 to the direction of the outer peripheral edge of the rotor 41 (the direction away from the center of the rotor 41 ), and the other end of the lever part 440 together with the operation part 442
  • the aperture plate 3 moves from the center of the rotor 41 to the outer peripheral edge of the rotor 41 (direction away from the center of the rotor 41 ), and the diaphragm plate 3 moves from the outer peripheral edge of the rotor 41 to the outer peripheral edge of the rotor 41 together with the one end of the rod 440 .
  • the direction of the center (the direction close to the center of the rotor 41 ) moves.
  • the arrangement of the diaphragm plate 3 is changed from the retracted position to the diaphragm position.
  • the operation portion 442 is guided by the intermediate guide portion 4432 from the outer peripheral edge portion of the rotor 41 toward the center of the rotor 41 (direction closer to the center of the rotor 41 ), and the other end portion of the lever portion 440 together with the operation portion 442
  • the diaphragm plate 3 moves toward the center of the rotor 41 (the direction close to the center of the rotor 41 ) from the outer peripheral edge of the rotor 41
  • the aperture plate 3 moves toward the center of the rotor 41 toward the outer peripheral edge of the rotor 41 together with the one end of the rod 440 .
  • the direction of the portion (the direction away from the center of the rotor 41 ) moves.
  • the aperture plate 3 is changed from the aperture position arrangement to the retracted position.
  • the rotor 41 of the present embodiment is provided with two sets of diaphragm units in which a diaphragm plate 3 , a rod portion 440 , a connecting shaft 441 , an operation portion 442 , and a guide portion 443 are formed as a group.
  • the diaphragm plate 3 , the lever portion 440 , the connecting shaft 441 and the operation portion 442 in the one diaphragm unit and the diaphragm plate 3 , the lever portion 440 , the connecting shaft 441 , and the operation portion 442 in the other diaphragm unit are connected by a rotor.
  • the center of 41 is a reference to form a point-symmetrical arrangement relationship.
  • the inner guide portion 4430 of the guide portion 443 of one aperture unit and the inner guide portion 4430 of the guide portion 443 of the other aperture unit are formed continuously, but the inner guide portion 4430 of the guide portion 443 of one aperture unit and the other
  • the inner guide portion 4430 of the guide portion 443 of one diaphragm unit may be formed discontinuously.
  • the initial position of the diaphragm plate 3 of each diaphragm unit is the retracted position, and when the rotor 41 rotates to one side of the optical axis circumferential direction (the counterclockwise direction of the optical axis circumferential direction in FIG. 2 ) As shown in FIG. 9 , the diaphragm plate 3 of one diaphragm unit is arranged at the diaphragm position, and the diaphragm plate 3 of the other diaphragm unit is arranged at the retracted position.
  • the diaphragm plate 3 forming one diaphragm unit is arranged on the In the retracted position, the diaphragm plate 3 of the other diaphragm unit is placed in the diaphragm position.
  • the configuration of the aperture device 2 of the present embodiment is as described above. Next, the operation of the aperture device 2 will be described.
  • each diaphragm plate 3 is arranged at the retracted position.
  • the operations of the one diaphragm unit and the other diaphragm unit, which are symmetrically arranged with the center of the rotor 41 as a reference point, vary according to the rotation direction of the rotor 41 .
  • a pulse is applied to the first region 4200 of the piezoelectric element 420 .
  • the contact portion 421 pushes the rotor 41 to one side in the circumferential direction of the optical axis (counterclockwise in FIG. 9A ). Accordingly, since the operation portion 442 moves to one side in the optical axis circumferential direction, the connecting rod rotates around the connecting shaft 441, and the diaphragm plate 3 fixed to the distal end of the connecting rod moves to the diaphragm position.
  • the diaphragm plate 3 When the diaphragm plate 3 is arranged at the diaphragm position, only the light passing through the diaphragm opening 31 reaches the lens 50 , and the other light is shielded by the shielding region 30 . The brightness of captured images and videos is suppressed.
  • the contact portion 421 pushes the rotor 41 to the other side in the circumferential direction of the optical axis (clockwise in FIG. 9B ).
  • the connecting rod rotates around the connecting shaft 441, and the diaphragm plate 3 fixed to the distal end of the connecting rod is retracted from the diaphragm position. position moves.
  • the contact portion 421 pushes the rotor 41 to the other side in the circumferential direction of the optical axis (clockwise in FIG. 10A ). Accordingly, since the operation portion 442 moves to the other side in the optical axis circumferential direction, the connecting rod rotates around the connecting shaft 441, and the diaphragm plate 3 fixed to the distal end of the connecting rod moves to the diaphragm position.
  • the other diaphragm plate 3 When the other diaphragm plate 3 is arranged at the diaphragm position, only the light passing through the diaphragm opening 31 reaches the lens 50 , and the other light is shielded by the shielding region 30 . The brightness of captured images and videos is suppressed.
  • the contact portion 421 pushes the rotor 41 to one side in the circumferential direction of the optical axis (counterclockwise in FIG. 10B ).
  • the connecting rod rotates around the connecting shaft 441, and the diaphragm plate 3 fixed to the distal end of the connecting rod is moved from the diaphragm position to the retracted position. move.
  • the aperture device 2 of the present embodiment can change the amount of light incident on the lens 50 using the two types of aperture plates 3 .
  • the diaphragm plate 3 having the diaphragm opening 31 having the predetermined area formed thereon is arranged at the diaphragm position (on the lens 50 ), it is possible to set the amount of incident light on the lens 50 . Therefore, when the diaphragm plate 3 is arranged at the aperture position, the area through which the light incident on the lens 50 passes can be set with a constant width at all times, whereby the amount of light incident on the lens 50 can be appropriately set.
  • the aperture device 2 of the present embodiment has an excellent effect of being able to appropriately set the amount of light incident on the lens 50 .
  • the diameter of the diaphragm opening 31 formed on one diaphragm plate 3 is different from the diameter of the diaphragm opening 31 formed by the other diaphragm plate 3 , it can be appropriately set step by step. Aperture value (light incident to lens 50).
  • the arrangement changing mechanism 4 is configured such that the annular cylindrical portion 411 of the rotor 41 is pressed by the mounting portion 422 configured to move along an elliptical trajectory by the piezoelectric element 420 , and the mounting portion 422
  • An opposing holding portion 430 for restricting the movement of the rotor 41 is arranged in front of the mounting portion 422 (the direction in which the strongest force is applied to the annular cylindrical portion 411 of the rotor 41 from the mounting portion 422 ), and a side holding portion 431 is arranged in front of the mounting portion 422 .
  • the side holding portion 431 applies a force to the center of the rotor 41 while allowing the rotor 41 to move, so that the movement of the rotor 41 is smoothed and positional displacement is suppressed.
  • the diaphragm plate 3 and the mechanism for moving the diaphragm plate 3 are arranged on the rotor 41 , the balance can be hardly broken, and the diaphragm device can be restrained from being relative to the lens 50 . posture changes.
  • the guide groove 443 formed in the rotor 41 functions to move the operation portion 442 attached to the lever portion 440, the thickness of the entire diaphragm device can be reduced.
  • the diaphragm device 2 of the present embodiment includes two diaphragm units, and the two diaphragm units are configured to be interlocked with the operation of the same rotor 41 . That is, since one of the two diaphragm units is configured not to follow the other, it is possible to appropriately operate the two diaphragm units with high precision in accordance with the rotation of the rotor 41 .
  • the diaphragm plate 3 , the lever portion 440 , the connecting shaft 441 and the operation portion 442 in the one diaphragm unit are different from the diaphragm plate 3 , the lever portion 440 , the connecting shaft 441 , and the operation portion 442 in the other diaphragm unit. Since the center of the rotor 41 is in a point-symmetrical arrangement, the amount of rotation of the rotor 41 for moving the aperture plate 3 can be suppressed, whereby the aperture plate 3 can be moved efficiently.
  • the aperture device of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be added without departing from the gist of the present invention.
  • the diaphragm plate 3 , the lever portion 440 , the connecting shaft 441 , and the operation portion 442 of the one diaphragm unit and the diaphragm plate 3 , the lever portion 440 , the connecting shaft 441 , and the operation portion 442 of the other diaphragm unit The arrangement relationship is point-symmetrical with respect to the center of the rotor 41, but is not limited to this configuration.
  • the diaphragm plate 3 , the lever portion 440 , the connecting shaft 441 , and the operation portion 442 of one diaphragm unit and the diaphragm plate 3 , the lever portion 440 , the connecting shaft 441 , and the operation portion 442 of the other diaphragm unit may be arranged as Through the optical axis of the drive source 42 (the piezoelectric element 420 to be described later) and the lens 50, a line-symmetrical positional relationship is formed around an imaginary line extending in the radial direction of the optical axis.
  • the aperture openings 31 are formed on both aperture plates 3 , but it is not limited to this structure.
  • the aperture opening 31 may not be formed on one of the two aperture plates 3 .
  • the diaphragm plate 3 in which the diaphragm opening 31 is not formed is the shielding region 30 , when it is arranged at the diaphragm position, the entire lens 50 is covered. In this way, the diaphragm plate 3 in which the diaphragm opening 31 is not formed is used to completely cut off the passage of light entering the lens 50 .
  • the connecting shaft 441 is fixed to the cover 45, but is not limited to this configuration.
  • the connecting shaft 441 may be fixed to the base 40 .
  • the drive source 42 in the above-described embodiment is constituted by the piezoelectric element 420, but is not limited to this structure.
  • the drive source 42 may also be constituted by a motor constituted by a rotor 4202 and a stator 4203 . In this way, since the thickness of the driving source 42 can be easily suppressed, the size of the aperture device 2 can be easily reduced.

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Abstract

本发明提供一种光圈装置,其设定入射到摄像头模块的透镜的光量,所述光圈装置具备:光阑板,其呈板状,并且形成有在板面方向上贯穿的光圈开口;以及配置变更机构,其将所述光阑板配置变更为光圈位置和缩回位置,所述光圈位置是在所述透镜上、并且所述光圈开口的中心配置于与所述透镜的光轴对应的位置上的位置,所述缩回位置是从所述透镜上缩回的位置。

Description

光圈装置、具备光圈装置的摄像头模块、电子设备 技术领域
本发明涉及搭载于摄像头模块、用于变更入射到透镜的光量的光圈装置、具备光圈装置的摄像头模块、电子设备。
背景技术
以往,在组装于电子设备(例如智能手机、平板电脑等)的摄像头模块中搭载有光圈装置,所述光圈装置根据指定的光圈值调整入射到透镜(使得到达摄像元件的光通过的透镜)的光量。
作为这种光圈装置,已知有例如日本特开2007-156283号公报中公开的如下装置:其具备两片光圈叶片和致动器,所述两片光圈叶片能够在相互重叠的状态下相对滑动,所述致动器向一方的光圈叶片传递动力。
两片光圈叶片上分别形成有凹部。另外,两片光圈叶片重叠,以便在彼此的凹部形成一个光圈开口(用于使到达透镜的光通过的开口)。
致动器构成为向一方的光圈叶片传递动力,并构成为在一方的光圈叶片移动时,另一方的叶片也与一方的光圈叶片联动地移动。
在如此构成的光圈装置中,若使两片光圈叶片相对滑动并增大光圈开口的尺寸,则能够增加入射到透镜的光量,若使两片光圈叶片相对滑动并减小光圈开口的尺寸,则能够减少入射到透镜的光量。
发明内容
发明要解决的问题
然而,在上述现有的光圈装置中,即使按照指定的光圈值来设定光圈开口的宽度,有时也会在两片叶片的配置位置上产生误差。在该情况下,光圈开口的宽度会成为与指定的光圈值不匹配的状态,入射到透镜的光量的设定有时会不适当。
因此,本发明的课题是鉴于这样的实际情况,提供一种能够适当地设定入射到透镜的光量的光圈装置、具备光圈装置的摄像头模块、电子设备。
用于解决问题的方案
本发明的光圈装置设定入射到摄像头模块的透镜的光量,其具备:
光阑板,其包含遮蔽向所述透镜的入射光的遮蔽区域;以及
配置变更机构,其将所述光阑板配置变更为光圈位置和缩回位置,所述光圈位置是在所述透镜上、并且所述光圈开口的中心配置于与所述透镜的光轴对应的位置上的位置,所述缩回位置是从所述透镜上缩回的位置。
在本发明的光圈装置中,
所述配置变更机构可以构成为:具有:
转子,其能够在以所述光轴为中心的光轴周向上旋转;
移动结构,其按照所述转子的旋转,使得所述光阑板移动至所述光圈位置或所述缩回位置;
所述移动结构具有:
杆部,其从所述光阑板的外周缘部向外方伸出;
连结轴,其呈轴状,以轴心与所述光轴延伸的光轴方向一致的姿态配置,且配置位置为固定的状态,并且与所述杆部以能够旋转的方式连结;
操作部,其安装在比所述杆部中的所述连结轴的连结位置更靠前端侧;
导向部,其按照所述转子的所述光轴周向中的旋转动作使所述操作部向与所述光轴周向以及所述光轴方向各自的方向正交的光轴径向的一方侧或另一方侧移动。
在本发明的光圈装置中,
所述导向部可以是形成于所述转子的导向槽。
本发明的光圈装置可以构成为:
所述配置变更机构具有驱动源,其用于使所述转子在所述光轴周向上旋转。
本发明的光圈装置可以构成为:
所述配置变更机构具有保持结构,其用于将所述转子的配置位置固定在所述转子自身的中心与所述透镜的中心一致的位置。
本发明的光圈装置具备两组将所述光阑板、所述杆部、所述连结轴、所述操作部以及所述导向部组成一组的光圈单元;
可以构成为在一方的所述光圈单元的所述光阑板和另一方的所述光圈单元的所述光阑板配置于所述缩回位置的开放状态下,在所述转子向所述光轴周向的一方侧旋转时,所述一方的所述光圈单元的所述光阑板向所述光圈位置移动,在所述开放状态下,在所述转子向所述光轴周向的另一方侧旋转时,所述另一方的所述光圈单元的所述光阑板向所述光圈位置移动。
在本发明的光圈装置中,
一方的所述光圈单元与另一方的所述光圈单元可以以所述转子的中心为基准点对称地配置。
本发明的光圈装置可以构成为:
在一方的所述光圈单元的所述光阑板上,形成有沿光轴方向贯穿的光圈开口,
另一方的所述光圈单元的光阑板形成有与所述一方的所述光圈单元的所述光阑板的所述光圈开口直径不同的光圈开口,或不形成光圈开口。
本发明的摄像头模块具备上述任一个的光圈装置。
本发明的电子设备具备上述任一个的光圈装置。
由上述所述,根据本发明的光圈装置、具备光圈装置的摄像头模块、电子设备,能够起到适当地设定入射到透镜的光量的优良效果。
附图说明
图1是本发明的一实施方式的光圈装置的外观图。
图2是示意性地表示同一实施方式的光圈装置的分解状态的图。
图3是同一实施方式的光圈装置的俯视图,是取下了罩的状态的俯视图。
图4是同一实施方式的光圈装置的俯视图,是取下了转子和转子上的结构的状态的俯视图。
图5是图4的V-V线对应的位置上的剖视图。
图6是同一实施方式的光圈装置的压电元件的俯视图。
图7A是同一实施方式的光圈装置的压电元件的说明图,是向第一区域施加电力的状态的说明图。
图7B是同一实施方式的光圈装置的压电元件的说明图,是停止向第一区域施加电力的状态的说明图。
图8A是同一实施方式的光圈装置的压电元件的说明图,是向第二区域施加电力的状态的说明图。
图8B是同一实施方式的光圈装置的压电元件的说明图,是停止向第二区域施加电力的状态的说明图。
图9A是同一实施方式的光圈装置的动作说明图,是使一方的光阑板从缩回位置向光圈位置移动的中途的状态的动作说明图。
图9B是同一实施方式的光圈装置的动作说明图,是使一方的光阑板从缩回位置移动到光圈位置的状态的动作说明图。
图10A是同一实施方式的光圈装置的动作说明图,是使另一方的光阑板从缩回位置向光圈位置移动的中途的状态的动作说明图。
图10B是同一实施方式的光圈装置的动作说明图,是使另一方的光阑板从缩回位置移动到光圈位置的状态的动作说明图。
图11是本发明的另一实施方式的光圈装置的说明图。
具体实施方式
以下参照附图对本发明的一个实施方式的光圈装置进行说明。
如图1所示,光圈装置搭载在组装于电子设备(例如,智能手机、平板电脑等)中的摄像头模块1上。
光圈装置2能够安装于包含有透镜50的透镜单元5,所述透镜50使得到达摄像元件的光通过,构成为按照设定的光圈值变更入射到透镜50的光(入射光)的光量。
在说明光圈装置2的结构之前,首先对透镜单元5的结构进行说明。
如图2和图5所示,透镜单元5具有:所述透镜50;壳体51,其容纳透镜50;以及受电部52,其安装在壳体51上,用于接收来自外部的电力供给(参照图5)。
壳体51中例如能够内装有用于调整透镜50的焦点的焦点控制部,经由受电部52能够向该焦点控制部供给电力。
在本实施方式中,在以下说明中,将透镜50的光轴延伸的方向称为光轴方向,将以透镜50的光轴为中心的周向称为光轴周向,将与所述光轴方向和所述光轴周向正交的方向称为光轴径向。
如图2所示,本实施方式的光圈装置2具备:光阑板3,其用于变更入射到透镜50的光量;以及 配置变更机构4,其将所述光阑板3配置变更为光圈位置和缩回位置,所述光圈位置是在所述透镜50上、并且所述光圈开口的中心配置于与所述透镜50的光轴一致的位置上的位置,所述缩回位置是从所述透镜50上缩回的位置。
另外,光阑板3的光圈位置,在俯视中,是光阑板3的中心(光圈开口的中心)与透镜50的光轴中心呈一致的状态的位置(参照图3)。光阑板3的缩回位置,在俯视中,是光阑板3整体配置在比透镜50更靠所述光轴径向中的外侧的状态的位置(参照图9B、图10B)。
如图3所示,光阑板3形成为平板状(可选地,在本实施方式中为圆板状)。另外,光阑板3包括遮蔽区域30,所述遮蔽区域30在配置于透镜50上的状态下,遮蔽入射到透镜50的光。
由于本实施方式的光阑板3在中央部形成有使入射到透镜50的光穿过的光圈开口31,因此遮蔽区域30形成为圆环状。
本实施方式的光圈装置2具备两个光阑板3。并且,形成在一方的光阑板3上的光圈开口31的直径与形成在另一方的光阑板3上的光圈开口31的直径不同。即,两个光阑板3分别按照不同的光圈值而形成。
如图2所示,配置变更机构4具有:基座40,其固定在透镜单元5(壳体51)上;转子41,其配置在基座40上,并能够在所述光轴周向上旋转;驱动源42,其用于使转子41在所述光轴周向上旋转;保持结构43,其用于将转子41的配置位置固定在预定位置(转子41自身的中心与透镜50的中心一致的位置);移动机构44,其与转子41的旋转联动以使光阑板3向光圈位置或缩回位置移动;以及罩45,其覆盖基座40、转子41、驱动源42、保持结构43、以及移动机构44。
基座40为圆环状。基座40在载置于壳体51的状态下固定在壳体51上。并且,基座40的中央部插通有透镜50的前端部。
转子41形成为圆环状。转子41的中心轴线配置在与光轴对应的位置。因此,转子41的旋转中心设定在与光轴对应的位置。
另外,本实施方式的转子41具有圆环状的圆环板部410和圆环筒部411,所述圆环筒部411从圆环板部410的中央部的下表面向下方突出。
圆环板部410的一方的板面朝向所述光轴方向的上方(图2中上方对应的朝向)配置,圆环板部410的另一方的板面朝向所述光轴方向的下方(图2中下方对应的朝向)配置。
圆环筒部411插通有透镜50的前端部。另外,圆环筒部411构成为利用外周面承受驱动源42和保持结构43。
如图4所示,驱动源42具有:压电元件420,其在圆环板部410的下侧,并且在所述光轴径上从外侧朝向内侧(朝向圆环筒部411)配置;抵接部421,其安装于压电元件420的前端,并与转子41抵接;安装部422,其将压电元件420安装至基座40;以及供电部423(参照图5),其供给传递到压电元件420的电力。
如图6所示,压电元件420包括排成两行两列的四个区域,对置的一对区域4200、4201彼此为同种区域。
一方的对置的一对区域(以下称为第一区域)4200和另一方的对置的一对区域(以下称为第二区域)4201在不同的时间点施加有电力(脉冲)。
其中,在向第一区域4200施加脉冲时,如图7A所示,由于各第一区域4200伸长,而另一方面各第二区域4201要保持原来的形状,因此压电元件420的前端部以向前方并且向宽度方向的一方侧弯曲的轨迹(圆弧状的轨迹)进入。
并且,在停止向第一区域4200施加脉冲时,如图7B所示,压电元件420的前端部以向后方并且向宽度方向的另一方侧弯曲的轨迹(圆弧状的轨迹)返回原来的位置。
因此,在对各第一区域4200施加重复脉冲时,安装于压电元件420的前端部的抵接部421沿着椭圆状的轨迹移动。
另外,在向第二区域4201施加脉冲时,如图8A所示,由于各第二区域4201伸长,而另一方面各第一区域4200要保持原来的形状,因此压电元件420的前端部以向前方并且向宽度方向的另一方侧弯曲的轨迹(圆弧状的轨迹)进入。
并且,在停止向第二区域4201施加脉冲时,如图8B所示,压电元件420的前端部以向后方并且向宽度方向的一方侧弯曲的轨迹(圆弧状的轨迹)返回原来的位置。
因此,在对各第二区域4201施加重复脉冲时,安装于压电元件420的前端部的抵接部421也沿着椭圆状的轨迹移动。
如图4所示,安装部422构成为对压电元件420向所述光轴径向的内侧施力,以便能够维持抵接部421和转子41的抵接状态。
本实施方式的供电部423与受电部52连接(参照图5)。因此,使得施加于压电元件420的电力经由透镜单元5的受电部52而被供給。
保持结构43具有:对置保持部430,其配置于在所述光轴径向上与驱动源42(后述的压电元件420)并排的位置;以及侧方保持部431,其配置于在所述光轴周向上偏离驱动源42(后述的压电元件420)的位置。
对置保持部430具有:球4300,其从所述光轴径向的外侧与转子41抵接;以及承受部4301,其在所述光轴径向的外侧承受球4300。
侧方保持部431具有:球4310,其从所述光轴径向的外侧与转子41抵接;筒状的气缸4311,其在所述光轴径向上配置在球4310的外侧;以及抵接用施力单元4312,其配置在气缸4311内,对球4300、4310向转子41施力。
因此,转子41在侧方保持部431的球4310在所述光轴径向上移动的范围内允许在所述光轴径向上移动,并在所述光轴径向上移动之后,利用抵接用施力单元4312的作用力返回原来的位置。
如图2所示,移动机构44具有:杆部440,其从所述光阑板3的外周缘部向外方伸出;连结轴441,其呈轴状,以与所述光轴方向平行的姿态配置,且配置位置为固定的状态,并且与所述杆部440以能够旋转的方式连结;操作部442,其安装在比所述杆部440中的所述连结轴441的连结位置更靠前端侧;以及导向部443,其按照所述转子41的所述光轴周向中的旋转动作使所述操作部442向与所述光轴周向以及所述光轴方向各自的方向正交的光轴径向的一方侧或另一方侧移动。
本实施方式的杆部440呈细长的薄板状,且长度方向上的一端部固定在光阑板3上。
连结轴441构成为即使转子41旋转,配置位置也不会改变。本实施方式的连结轴441固定在罩45上,并从罩45的下表面向下方伸出。
另外,连结轴441上连结有能够旋转的、杆部440的长度方向上的一端部和另一端部之间的中间部。因此,杆部440能够以与连结轴441连结的位置为中心在周向(以连结轴441为中心的周向)上旋转。
操作部442形成为从操作部442向转子41伸出。另外,本实施方式的操作部442形成为轴状。
导向部443由导向槽构成,所述导向槽形成为相对于所述转子41在上表面开口。以下,将导向部443称为导向槽进行说明。
如图3所示,导向槽443具有:内侧导向部4430,其形成在转子41的中央部侧(所述光轴径向的内侧);外侧导向部4431,其形成在比内侧导向部4430靠转子41的外周缘部侧(所述光轴径向的外侧);以及中间导向部4432,其与内侧导向部4430和外侧导向部4431连续。
内侧导向部4430和外侧导向部4431沿着所述光轴周向形成圆弧状。
另外,所述光轴周向的内侧导向部4430的形成位置与外侧导向部4431的形成位置设定为不重合。即,内侧导向部4430和外侧导向部4431形成在光轴径向上和光轴周向上均相互远离的位置,该内侧导向部4430和外侧导向部4431经由中间导向部4432连接。
本实施方式的导向槽443上插入有操作部442,转子41构成为与操作部442相对旋转。因此,若在转子41旋转时导向槽443相对于操作部442的位置发生变化,则操作部442在导向槽443内被转子41推压,从而向远离转子41的中心的方向或靠近转子41的中心的方向移动。
即,在本实施方式中,操作部442构成设置于杆部440的卡合部,导向槽443构成设置于转子41并且与操作部442卡合的被卡合部,通过操作部442与导向槽443卡合,杆部440与转子41的旋转联动,以连结轴441为中心旋转。
具体而言,在与操作部442对应的位置上配置有内侧导向部4430的状态下使转子41旋转时,中间导向部4432通过与操作部442对应的位置,外侧导向部4431到达与操作部442对应的位置。
此时,操作部442被中间导向部4432从转子41的中心向转子41的外周缘部的方向(远离转子41的中心的方向)引导,杆部440的所述另一端部与操作部442一起从转子41的中心向转子41的外周缘部的方向(远离转子41的中心的方向)移动,光阑板3与杆部440的所述一端部一起从转子41的外周缘部向转子41的中心的方向(靠近转子41的中心的方向)移动。并且,光阑板3从缩回位置配置变更为光圈位置。
另一方面,在与操作部442对应的位置上配置有外侧导向部4431的状态下使转子41旋转时,中间导向部4432通过与操作部442对应的位置,内侧导向部4430到达与操作部442对应的位置。
此时,操作部442被中间导向部4432从转子41的外周缘部向转子41的中心的方向(靠近转子41的中心的方向)引导,杆部440的所述另一端部与操作部442一起从转子41的外周缘部向转子41的中心的方向(靠近转子41的中心的方向)移动,光阑板3与杆部440的所述一端部一起向转子41的中心向转子41的外周缘部的方向(远离转子41的中心的方向)移动。并且,光阑板3从光圈位置配置变更为缩回位置。
其中,本实施方式的转子41上配置有两组将一个光阑板3、杆部440、连结轴441、操作部442以及导向部443组成为一组的光圈单元。
另外,一方的光圈单元中的光阑板3、杆部440、连结轴441以及操作部442和另一方的光圈单元中的光阑板3、杆部440、连结轴441以及操作部442以转子41的中心为基准形成点对称的配置关系。此外,一方的光圈单元的导向部443的内侧导向部4430和另一方的光圈单元的导向部443的内侧导向部4430连续地形成,但是一方的光圈单元的导向部443的内侧导向部4430和另一方的光圈单元的导向部443的内侧导向部4430也可以形成为非连续。
在本实施方式中,各光圈单元的光阑板3的初始位置为缩回位置,在转子41向光轴周向的一方侧(图2的所述光轴周向的逆时针方向)旋转时,如图9所示,形成一方的光圈单元的光阑板3配置在光圈位置而另一方的光圈单元的光阑板3配置在缩回位置的状态。
并且,在转子41向光轴周向的另一方侧(图2的所述光轴周向的顺时针方向)旋转时,如图10所示,形成一方的光圈单元的光阑板3配置在缩回位置,另一方的光圈单元的光阑板3配置在光圈位置的状态。
本实施方式的光圈装置2的结构如上所述。接着,对光圈装置2的动作进行说明。
光圈装置2在初始状态(未采取变更入射到透镜50的光量的动作的状态)下,如图3所示,各光阑板3配置在缩回位置。另外,在本实施方式的光圈装置2中,构成为以转子41的中心为基准点对称配置的一方的光圈单元和另一方的光圈单元的动作根据转子41的旋转方向而变化。
具体而言,在利用一方的光阑板3变更入射到透镜50的光量时,压电元件420的第一区域4200上施加有脉冲。
这样,抵接部421将转子41推转到所述光轴周向的一方侧(图9A中的逆时针方向)。伴随于此,由于操作部442向所述光轴周向的一方侧移动,因此连结杆以连结轴441为中心旋转,固定于连结杆的前端部的光阑板3向光圈位置移动。
在光阑板3配置于光圈位置时,只有通过光圈开口31的光到达透镜50,除此之外的光被遮蔽区域30遮蔽。抑制了拍摄的图像和视频的亮度。
并且,在一方的光阑板3返回退位位置时,压电元件420的第二区域4201上施加有脉冲。
这样,抵接部421将转子41推转到所述光轴周向的另一方侧(图9B中的顺时针方向)。伴随于此,由于操作部442向所述光轴周向的另一方侧移动,因此连结杆以连结轴441为中心旋转,固定于连结杆的前端部的光阑板3从光圈位置向缩回位置移动。
在一方的光阑板3配置于缩回位置时,透镜50的上方整体敞开。
同样地,在利用另一方的光阑板3变更入射到透镜50的光量时,压电元件420的第二区域4201上施加有脉冲。
这样,抵接部421将转子41推转到所述光轴周向的另一方侧(图10A中的顺时针方向)。伴随于此,由于操作部442向所述光轴周向的另一方侧移动,因此连结杆以连结轴441为中心旋转,固定于连结杆的前端部的光阑板3向光圈位置移动。
在另一方的光阑板3配置于光圈位置时,仅通过光圈开口31的光到达透镜50,除此之外的光由遮蔽区域30遮蔽。抑制了拍摄的图像和视频的亮度。
在另一方的光阑板3返回退位位置时,压电元件420的第一区域4200上施加有脉冲。
这样,抵接部421将转子41推转到所述光轴周向的一方侧(图10B中的逆时针方向)。伴随于此,由于操作部442向所述光轴周向的一方侧移动,因此连结杆以连结轴441为中心旋转,固定于连结杆的前端部的光阑板3从光圈位置向缩回位置移动。
在另一方的光阑板3配置于缩回位置时,透镜50的上方整体敞开。
这样,本实施方式的光圈装置2能够利用两种光阑板3变更入射到透镜50的光量。
如上所述,根据本实施方式的光圈装置2,由于构成为通过将形成有预设面积的光圈开口31的光阑板3配置在光圈位置(透镜50上),能够设定入射到透镜50的光量,因此在光阑板3配置在光圈位置时,能够始终以固定宽度设定使入射到透镜50的光穿过的区域,由此,能够适当地设定入射到透镜50的光量。
因此,本实施方式的光圈装置2起到能够适当地设定入射到透镜50的光量的优良效果。
另外,本实施方式的光圈装置2中,由于在一方的光阑板3形成的光圈开口31的直径与另一方的光阑板3形成的光圈开口31的直径不同,因此能够逐步适当地设定光圈值(入射到透镜50的光亮)。
此外,配置变更机构4构成为利用安装部422对转子41的圆环筒部411进行推压操作,所述安装部422构成为利用压电元件420描绘椭圆状的轨迹并移动,在安装部422的前方(从安装部422对转子41的圆环筒部411施加最强力的方向)配置有限制转子41的移动的对置保持部430,安装部422的前 方配置有侧方保持部431,所述侧方保持部431在允许转子41移动的同时向转子41的中心施加作用力,因此在使转子41的移动平滑的同时,还抑制了位置偏移。
另外,在本实施方式的光圈装置2中,由于在转子41上配置了光阑板3和用于使光阑板3移动的机构,因此平衡能够难以被破坏,能够抑制光圈装置相对于透镜50的姿态发生变化。
而且,由于构成为利用形成在转子41上的导向槽443来发挥用于使安装于杆部440的操作部442移动的功能,因此还能够抑制光圈装置整体的厚度。
本实施方式的光圈装置2具备两个光圈单元,这两个光圈单元构成为与相同的转子41的动作联动。即,由于两个光圈单元中的一方以不从动于另一方而构成,因此能够按照转子41的旋转而适当地使两个光圈单元高精度地进行动作。
而且,由于一方的光圈单元中的光阑板3、杆部440、连结轴441以及操作部442与另一方的光圈单元中的光阑板3、杆部440、连结轴441以及操作部442以转子41的中心为基准形成点对称的配置关系,因此能够抑制用于使光阑板3移动的转子41的旋转量,由此,能够高效地使光阑板3移动。
此外,本发明的光圈装置不限定于上述实施方式,当然可以在不脱离本发明的主旨的范围内施加各种变更。
在上述实施方式中,一方的光圈单元的光阑板3、杆部440、连结轴441以及操作部442与另一方的光圈单元的光阑板3、杆部440、连结轴441以及操作部442以转子41的中心为基准形成点对称的配置关系,但不限定于该结构。例如,一方的光圈单元的光阑板3、杆部440、连结轴441以及操作部442与另一方的光圈单元的光阑板3、杆部440、连结轴441以及操作部442还可以配置为通过驱动源42(后述的压电元件420)和透镜50的光轴,并以在所述光轴径向上延伸的假想线为中心形成线对称的位置关系。
在上述实施方式中,两个光阑板3上均形成有光圈开口31,但不限定于该结构。例如,两个光阑板3中的一方上可以不形成有光圈开口31。
由于未形成有光圈开口31的光阑板3整体为遮蔽区域30,因此若配置在光圈位置,则成为覆盖透镜50整体的状态。这样,未形成有光圈开口31的光阑板3用于使入射到透镜50的光的通路成为完全切断的状态。
在上述实施方式中,连结轴441固定在罩45上,但不限定于该结构。例如,只要在转子41旋转时设置位置不变,连结轴441也可以固定在基座40上。
上述实施方式的驱动源42由压电元件420构成,但不限定于该结构。例如,如图11所示,驱动源42还可以由马达构成,所述马达由转子4202和定子4203构成。这样,由于容易抑制驱动源42的厚度,因此容易使光圈装置2小型化。
附图标记说明
1:摄像头模块
2:光圈装置
3:光阑板
4:配置变更机构
31:光圈开口
50:透镜

Claims (10)

  1. 一种光圈装置,其特征在于,所述光圈装置设定入射到摄像头模块的透镜的光量,
    所述光圈装置具备:
    光阑板,其包含遮蔽向所述透镜的入射光的遮蔽区域;以及
    配置变更机构,其将所述光阑板配置变更为光圈位置和缩回位置,所述光圈位置是在所述透镜上、并且所述光圈开口的中心配置于与所述透镜的光轴对应的位置上的位置,所述缩回位置是从所述透镜上缩回的位置。
  2. 根据权利要求1所述的光圈装置,其特征在于,
    所述配置变更机构具有:
    转子,其能够在以所述光轴为中心的光轴周向上旋转;
    移动结构,其按照所述转子的旋转,使得所述光阑板移动至所述光圈位置或所述缩回位置;
    所述移动结构具有:
    杆部,其从所述光阑板的外周缘部向外方伸出;
    连结轴,其呈轴状,以轴心与所述光轴延伸的光轴方向一致的姿态配置,且配置位置为固定的状态,并且与所述杆部以能够旋转的方式连结;
    操作部,其安装在比所述杆部中的所述连结轴的连结位置更靠前端侧;
    导向部,其按照所述转子的所述光轴周向中的旋转动作使所述操作部向与所述光轴周向以及所述光轴方向各自的方向正交的光轴径向的一方侧或另一方侧移动。
  3. 根据权利要求2所述的光圈装置,其特征在于,
    所述导向部是形成于所述转子的导向槽。
  4. 根据权利要求2所述的光圈装置,其特征在于,
    所述配置变更机构具有驱动源,其用于使所述转子在所述光轴周向上旋转。
  5. 根据权利要求2所述的光圈装置,其特征在于,
    所述配置变更机构具有保持结构,其用于将所述转子的配置位置固定在所述转子自身的中心与所述透镜的中心一致的位置。
  6. 根据权利要求2所述的光圈装置,其特征在于,
    具备两组光圈单元,所述光圈单元将所述光阑板、所述杆部、所述连结轴、所述操作部以及所述导向部组成一组;
    所述光圈装置以在一方的所述光圈单元的所述光阑板和另一方的所述光圈单元的所述光阑板一起配置于所述缩回位置的开放状态下,在所述转子向所述光轴周向的一方侧旋转时,所述一方的所述光圈单元的所述光阑板向所述光圈位置移动,在所述开放状态下,在所述转子向所述光轴周向的另一方侧旋转时,所述另一方的所述光圈单元的所述光阑板向所述光圈位置移动的方式构成。
  7. 根据权利要求6所述的光圈装置,其特征在于,
    所述一方的所述光圈单元与所述另一方的所述光圈单元以所述转子的中心为基准点对称地配置。
  8. 根据权利要求6所述的光圈装置,其特征在于,
    在一方的所述光圈单元的所述光阑板上,形成有沿光轴方向贯穿的光圈开口,
    另一方的所述光圈单元的光阑板,形成有与所述一方的所述光圈单元的所述光阑板的所述光圈开口直径不同的光圈开口、或不形成光圈开口。
  9. 一种摄像头模块,其特征在于,
    具备根据权利要求1~8中任一项所述的光圈装置。
  10. 一种电子设备,其特征在于,
    具备根据权利要求1~8中任一项所述的光圈装置。
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CN102067033A (zh) * 2008-06-19 2011-05-18 奥林巴斯株式会社 光调节装置
US20110091198A1 (en) * 2009-10-20 2011-04-21 Canon Kabushiki Kaisha Aperture unit and lens barrel including the same
CN102402101A (zh) * 2010-09-08 2012-04-04 三星电子株式会社 光量调节设备
CN103649829A (zh) * 2011-07-07 2014-03-19 佳能电子株式会社 光量调节装置和光学设备
CN108139559A (zh) * 2015-08-19 2018-06-08 富士胶片株式会社 透镜装置
WO2019124071A1 (ja) * 2017-12-21 2019-06-27 株式会社nittoh 絞り装置、レンズ鏡筒及び撮像装置又は投影装置

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JP7367022B2 (ja) 2023-10-23
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EP4137886A4 (en) 2023-07-26
US20230384650A1 (en) 2023-11-30

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