A plate-shaped ultrasonic motor for use in an auto-focus driving part or an OIS driving part of a lens drive apparatus, includes: a plate-shaped resonant part disposed in parallel to an optical axis; a pair of plate-shaped piezoelectric elements laminated to the plate-shaped resonant part from both sides thereof in a plate-thickness direction; and a single electrode having a pair of plate-shaped terminal parts sandwiching the pair of piezoelectric element from both sides in the plate-thickness direction to distribute electric power to the pair of plate-shaped piezoelectric elements.
G02B 7/09 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
G02B 7/08 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
G02B 27/64 - Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
A drive element serves for driving a passive element (4) relative to an active element (1). The active element (1) comprises a resonator (2) and an oscillating excitation means (23), and at least one arm (21) extending in an arm direction (21a) and comprising, at an outer end, a contact element (31) that is movable by way of oscillating movements of the arm (21), for driving the passive element (4). The arm (21) comprises, at its outer end, a contact element (31) driving a contact area (41) of the passive element (4). At least one of the following is the case: the contact element (31) comprises an insert (80) made of a material that is made from a material that is different from the material of the resonator (2), in particular harder than the material of the resonator (2); a first wear suppressing element (83) is arranged on the contact element (31) and a second wear suppressing element is (84) arranged on the passive element (4) in the contact area (41); the passive element (4) is made of a wear suppressing material.
H02N 2/00 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
H02N 2/02 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuatorsLinear positioners
H02N 2/10 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
A drive unit for driving a passive element (4) relative to an active element (1), comprises a resonator (2) and an excitation means (23), and two arms (21, 22) with contact elements (31, 32) that are movable by way of oscillating movements and thereby drive the passive element (4). The resonator (2) is attached to a base element (5) by means of fixation elements (29). For at least a first arm (21) and for its contact element (31, 32) there is a shortest path through the active element 1 to a nearest fixation element (29). The shortest path does not intersect an outline of the excitation means (23), or, of it does, the area of an overhanging portion of the excitation means (23) is less than ten percent of an area of the excitation means (23). As a result, the excitation means are less likely to break due to forces on the arms.
H02N 2/00 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
H02N 2/02 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuatorsLinear positioners
H02N 2/10 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
A piezoelectric drive unit is configured for driving a passive element relative to an active element, wherein the active element includes a resonator with two arms, each extending in parallel to a reference plane and ending in a contact element, which is movable by oscillating movements of the arms and thereby drives the passive element. Each of the arms has, at the outer end of the arm, a protrusion extending inward, toward the other arm, and on at least one of the arms, the respective contact element, arranged at the arm's outer end, extends outward, away from the other arm.
A driving-unit operation method includes: generating pulse blocks on the basis of driving pulses; and modifying a driving signal in accordance with a position error signal. In the modifying the driving signal, when the position error signal is in a first range, the shape of the driving pulses is modified so as to form a first driving-pulse shape, and the pulse-block duty cycle is set to a first pulse-block duty cycle value, whereas when the position error signal is in a second range, the shape of the driving pulses is modified so as to form a second driving-pulse shape, and the pulse-block duty cycle is set to a second pulse-block duty cycle value.
G02B 7/08 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
G02B 27/64 - Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
G03B 5/00 - Adjustment of optical system relative to image or object surface other than for focusing of general interest for cameras, projectors or printers
A method for operating a drive unit having an active element with a resonator and an excitation structure for exciting oscillations in the resonator and thereby driving a passive element. The method includes driving the excitation structure with a driving signal, the driving signal being a periodic signal having driving pulses repeated with an excitation frequency. Depending on a control signal, modifying the driving signal, if the control signal is within a first range, by modifying the excitation frequency or modifying the shape of the driving pulses and, if the control signal is within a second range, repeatedly omitting driving pulses.
H01L 41/04 - SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR - Details thereof - Details of piezo-electric or electrostrictive elements
A drive element serves for driving a passive element (4) relative to an active element (1). The active element (1) comprises a resonator (2) and an oscillating excitation means (23), and at least one arm (21) extending in an arm direction (21a) and comprising, at an outer end, a contact element (31) that is movable by way of oscillating movements of the arm (21), for driving the passive element (4). The arm (21) comprises, at its outer end, a protrusion (33) extending in a first direction relative to the arm direction (21a), on a first side of the arm direction. The arm's contact element (31) extends in a second direction relative to the arm direction (21a), on a second side of the arm direction, opposite to the first side.
H02N 2/00 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
H02N 2/02 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuatorsLinear positioners
H02N 2/10 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
8.
LENS DRIVING APPARATUS, CAMERA MODULE AND CAMERA-MOUNTED APPARATUS
A lens drive device is provided with a first fixed part, a first movable part, a first supporting part, and a Z-direction drive unit which moves the first movable section in an optical axis direction (the Z-direction) relative to the first fixed part and is constituted by an ultrasonic motor that converts vibration motion into rotational motion. The lens drive device further has a rotating body which rotates around the optical axis in response to rotational motion of the Z-direction drive unit, and a mechanical element which converts the rotational motion of the rotating body into linear motion in the optical axis direction, the first movable part being moved in the optical axis direction by rotation of the rotating body.
A drive unit for driving a passive element relative to an active element includes a resonator and excitation device, at least a first arm including, at an outer end of the arm, a first contact element that is movable by way of oscillating movements of the first arm, thereby driving the passive element relative to the active element. The passive element includes a first contact area, arranged to be in contact with a first contact element of the first arm. A magnetic element is arranged to exert a magnetic force causing a relative force between the active element and passive element, whereby the first contact area is pressed against the first contact element with a pre-stress force.
H02N 2/02 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuatorsLinear positioners
H02N 2/00 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
A lens driving device includes: a movable part for accommodating a lens; and an ultrasonic motor having a resonance part configured to move the movable part by motion of the resonance part of the ultrasonic motor. The resonance part has a pair of arms, and is disposed such that only one of the arms is in contact with the movable part.
G02B 27/64 - Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
G02B 7/02 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses
G02B 7/09 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
H02N 2/02 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuatorsLinear positioners
H04N 23/54 - Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
H04N 23/55 - Optical parts specially adapted for electronic image sensorsMounting thereof
H04N 23/68 - Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
H04N 23/80 - Camera processing pipelinesComponents thereof
G03B 30/00 - Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
An oscillating drive unit for driving a passive element relative to an active element includes a resonator with at least two arms extending in parallel to a reference plane, one of the arms including a contact element, movable by way of oscillating movements, for driving the passive element relative to the active element. Two of the arms extend in a substantially symmetric manner, and an other one of the arms is arranged not to come into contact with the passive element.
A piezoelectric drive unit is configured for driving a passive element (4) relative to an active element (1), wherein the active element (1) comprises a resonator (2) with two arms (21, 22) each extending in parallel to a reference plane (28) and ending in a contact element (31, 32) which is movable by oscillating movements of the arms (21, 22) and thereby drives the passive element (4). Each of the arms (21, 22) comprises, at the outer end of the arm, a protrusion extending inward, toward the other arm, and on at least one of the arms (21, 22), the respective contact element (31, 32), arranged at the arm's outer end, extends outward, away from the other arm.
H02N 2/00 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
H02N 2/02 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuatorsLinear positioners
H02N 2/10 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
A driving-unit operation method according to the present invention includes: a step for generating pulse blocks on the basis of driving pulses; and a step for modifying a driving signal in accordance with a position error signal. In the step for modifying the driving signal, when the position error signal is in a first range, the shape of the driving pulses is modified so as to form a first driving-pulse shape, and the pulse-block duty cycle is set to a first pulse-block duty cycle value (C-83, C-84), whereas when the position error signal is in a second range, the shape of the driving pulses is modified so as to form a second driving-pulse shape, and the pulse-block duty cycle is set to a second pulse-block duty cycle value (C-85, C-86).
H02N 2/00 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
G03B 5/00 - Adjustment of optical system relative to image or object surface other than for focusing of general interest for cameras, projectors or printers
H04N 5/232 - Devices for controlling television cameras, e.g. remote control
A method serves for operating a drive unit comprising an active element (1) having a resonator (2) and an excitation means (23) for exciting oscillations in the resonator (2) and thereby driving a passive element (4). The method comprises the steps of • driving the excitation means (23) with a driving signal, the driving signal being a periodic signal comprising driving pulses repeated with an excitation frequency; • depending on a control signal, modifying the driving signal by: o if the control signal is within a first range, modifying the excitation frequency or modifying the shape of the driving pulses, and o if the control signal is within a second range, repeatedly omitting driving pulses.
H03B 5/32 - Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
H03K 3/66 - Generators producing trains of pulses, i.e. finite sequences of pulses by interrupting the output of a generator
15.
Lens driving device, camera module, and camera-mounted device
A lens driving device, a camera module, and a camera-mounted device are provided, which are capable of reducing the effect of external magnetism and of being reduced in size and profile thereof. The lens driving device includes an AF driving part configured to move, with respect to an AF fixing part, an AF movable part in a Z-direction extending along an optical axis, and an OIS driving part configured to move, with respect to an OIS fixing part, an OIS movable part in an X-direction and a Y direction each orthogonal to optical axis. The OIS driving part and the AF driving part are each composed of an ultrasonic motor. In a rectangle defined by two sides where the OIS driving part is disposed, the AF driving part is disposed along a side different from the two sides.
G02B 7/09 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
G02B 7/08 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
G02B 27/64 - Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
A drive unit for driving a passive element (4) relative to an active element (1) comprises a resonator (2) and excitation means (23), at least a first arm (21) comprising, at an outer end of the arm, a first contact element (31) that is movable by way of oscillating movements of the first arm (21), thereby driving the passive element (4) relative to the active element (1). The passive element (4) comprises a first contact area (41), arranged to be in contact with a first contact element (31) of the first arm (21). A magnetic element (9) is arranged to exert a magnetic force causing a relative force between the active element (1) and passive element (4), whereby the first contact area (41) is pressed against the first contact element (31) with a pre-stress force.
H02N 2/00 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
H02N 2/10 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
G04C 3/12 - Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork driven by piezoelectric meansElectromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork driven by magnetostrictive means
17.
LENS DRIVE DEVICE, CAMERA MODULE, AND CAMERA-EQUIPPED DEVICE
Provided are a lens drive device capable of reducing the effects of external magnetism and which can be made compact and low-profile, a camera module, and a camera-equipped device. A lens drive device (1) is provided with a first fixed part (12), a first movable part (11), a first supporting part (14), and a Z-direction drive unit (13) which moves the first movable section in an optical axis direction (the Z-direction) relative to the first fixed part and is constituted by an ultrasonic motor that converts vibration motion into rotational motion. The lens drive device further has a rotating body (15) which rotates around the optical axis in response to rotational motion of the Z-direction drive unit, and a mechanical element which converts the rotational motion of the rotating body into linear motion in the optical axis direction, the first movable part being moved in the optical axis direction by rotation of the rotating body.
G03B 5/00 - Adjustment of optical system relative to image or object surface other than for focusing of general interest for cameras, projectors or printers
G03B 15/00 - Special procedures for taking photographsApparatus therefor
G02B 7/04 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
An oscillating drive unit for driving a passive element (4) relative to an active element (1) comprises a resonator (2) with at least two arms (21, 22) extending in parallel to a reference plane (28), one of the arms (21, 22) comprising, a contact element (31) movable by way of oscillating movements, for driving the passive element (4) relative to the active element (1). The at least two arms (21, 22) extend in a substantially symmetric manner, and the other one of the arms (21, 22) is arranged not to come into contact with the passive element (4).
H02N 2/00 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
H02N 2/02 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuatorsLinear positioners
H02N 2/10 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
19.
LENS DRIVING DEVICE, CAMERA MODULE, AND CAMERA-MOUNTED DEVICE
Provided is a lens driving device, a camera module, and a camera-mounted device which can reduce the impact of external magnetism and which allow miniaturization and a reduction in height. This lens driving device comprises: a first fixing part; a first movable part disposed so as to be separated from the first fixing part; a first support part supporting the first movable part with respect to the first fixing part; and a Z-direction driving part that is disposed on the first fixing part and moves the first movable part in the optical axis direction with respect to the first fixing part. The Z-direction driving part has a piezoelectric element and a resonance part, and is composed of an ultrasonic motor that converts vibration motion into linear motion. The resonance part has a trunk portion held by the piezoelectric element, and first and second arm portions extending in the same direction from the trunk portion. The first and second arm portions deform when resonating with the vibration of the piezoelectric element, and only the first arm portion is in contact with the first movable part.
G03B 5/00 - Adjustment of optical system relative to image or object surface other than for focusing of general interest for cameras, projectors or printers
G02B 7/04 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
G02B 7/08 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
A piezoelectric drive unit is configured for driving a passive element relative to an active element, wherein the active element includes a resonator with two arms, each extending in parallel to a reference plane and ending in a contact element, which is movable by oscillating movements of the arms and thereby drives the passive element. A pre-stress element is arranged to exert a relative force between the active element and passive element, pressing them against one another with pre-stress forces that are normal to the reference plane.
A lens driving device, a camera module, and a camera-mounted device are provided, which are capable of reducing the effect of external magnetism and of being reduced in size and profile thereof. The lens driving device includes an AF driving part configured to move, with respect to an AF fixing part, an AF movable part in a Z-direction extending along an optical axis, and an OIS driving part configured to move, with respect to an OIS fixing part, an OIS movable part in an X-direction and a Y direction each orthogonal to optical axis. The OIS driving part and the AF driving part are each composed of an ultrasonic motor. In a rectangle defined by two sides where the OIS driving part is disposed, the AF driving part is disposed along a side different from the two sides.
A piezoelectric drive unit is configured for driving a passive element (4) relative to at least one active element (1, 1'), wherein the active element comprises a substantially planar resonator (2) with two arms (21, 22), each arm extending in parallel to a reference plane and ending in a contact element (31, 32) which is movable by oscillating movements of the arms, thereby driving the passive element. A pre- stress element (6) is arranged to exert a relative force (Fp) between active element and passive element, pressing them against each another with pre-stress forces that are normal to the reference plane.
A micro suspension device comprises a base (61) and a carrier (62) that is designed to move relative to the base (61) along a reference axis (64). The carrier (62) is suspended and guided relative to the base (61) by a spring arrangement (1), with • the spring arrangement (1) comprising two spring units (21, 22), • each spring unit (21, 22) comprising two arms (31, 32), • each arm (31, 32) comprising two sections (41, 42) and a connection node (43), the first section (41) extending from a first attachment node (51), attached to the base (61), to the connection node (43), the second section (42) extending from the connection node (43) to a second attachment node (52) attached to the carrier (62), • wherein in each spring unit (21, 22), o the arms (32, 33) are connected at their connection nodes (43), o are mirror-symmetric to one another, and o are angled relative to one another.
G02B 7/02 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses
F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
G02B 7/04 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
A positioning device for a picture stabilizer for the controlled movement of a carrier with respect to a base includes a first coupling element, a second coupling element, a first transmission unit, and a second transmission unit. The first coupling element, by way of a first suspension, is assembled in a movable manner with respect to the base and is movable by a first linear drive. The second coupling element, by way of a second suspension, is assembled in a movable manner with respect to the base and is movable by a second linear drive. The first transmission unit transmits movement of the first coupling element onto the carrier and the second transmission unit transmits movement of the second coupling element onto the carrier. The first coupling element and the second coupling element in each case have a movability with essentially exactly one translatory degree of freedom.
A positioning device for an image stabilizer for controlled movement of a carrier (5) relative to a base (4) comprises: • a first coupling element (13), which is mounted movably with a first suspension (11) relative to the base (4) and is movable by means of a first drive (12), • a second coupling element (23), which is mounted movably with a second suspension (21) relative to the base (4) and is movable by means of a second drive (22), • a first transmission unit (14), by means of which a movement of the first coupling element (13) can be transmitted to the carrier (5), • a second transmission unit (24), by means of which a movement of the second coupling element (23) can be transmitted to the carrier (5), • wherein the first drive (12) and the second drive (22) are linear drives and the first coupling element (13) and the second coupling element (23) each have a mobility with substantially exactly one translational degree of freedom.
A drive unit for the movement of an active element with respect to a passive element, wherein the active element includes a resonator and at least one excitation device for exciting oscillations of the resonator. The resonator includes contact regions for exerting forces onto the passive element. The active element may be driven with respect to the passive element by way of oscillating movements. The resonator includes at least two arms, preferably a pair of arms. The at least two arms of an arm pair, proceeding from a connection region of the resonator, are formed on the same side of the resonator. In each case the contact regions are formed at the outer ends of the arms, wherein the contact regions may be moved to and away from one another by way of oscillating movements of the arm pair. Thereby, a relative movement of the passive element with respect to the active element may be effected.
H01L 41/04 - SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR - Details thereof - Details of piezo-electric or electrostrictive elements
H02N 2/00 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
patents
