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EP-4167559-B1 - DRIVING APPARATUS, CAMERA MODULE, AND ELECTRONIC DEVICE

EP4167559B1EP 4167559 B1EP4167559 B1EP 4167559B1EP-4167559-B1

Inventors

  • SONG, BO

Dates

Publication Date
20260506
Application Date
20210610

Claims (9)

  1. A drive apparatus, comprising a fixed assembly (1), a carrier (2), and an electrically drive assembly (3); wherein a first end of the electrically drive assembly (3) is connected to the fixed assembly (1), and a second end of the electrically drive assembly (3) is connected to the carrier (2); and the carrier (2) is used for carrying a function device; wherein in a case of applying a voltage to the electrically drive assembly (3), the electrically drive assembly (3) deforms to drive the carrier (2) to move; wherein the electrically drive assembly (3) comprises electrically drive pieces (31), first ends of the electrically drive pieces (31) are connected to the fixed assembly (1), and second ends of the electrically drive pieces (31) are connected to the carrier (2); wherein the electrically drive piece (31) is an ion conduction drive piece, the ion conduction drive piece comprises an ion exchange resin layer (102), a first electrode layer (101) and a second electrode layer (103) respectively disposed at two opposite surfaces of the ior exchange resin layer, and a polymer electrolyte is disposed in the ion exchange resin layer; the polymer electrolyte comprises cations and anions; wherein the in a case of applying a voltage to the electrically drive assembly (3), the electrically drive assembly (3) deforming to drive the carrier (2) to move, comprises: when applying the voltage to the ion conduction drive piece in a thickness direction, the cations in the polymer electrolyte move to a cathode side, and the ion conduction drive piece is displaced in the thickness direction to drive the carrier (2) to move; and the thickness direction comprises a first direction and a second direction; and wherein in a case that a voltage applied to the ion conduction drive piece is a first voltage, the ion conduction drive piece drives the carrier (2) to move along the first direction; and in a case that a voltage applied to the ion conduction drive piece is a second voltage, the ion conduction drive piece drives the carrier (2) to move along the second direction; and wherein polarities of the first voltage and the second voltage are opposite, and the first direction and the second direction are opposite to each other; wherein the fixed assembly (1) comprises an annular structure member with a first through hole (11), the carrier (2) is disposed in the first through hole (11), there are a plurality of electrically drive pieces (31), and the plurality of electrically drive pieces (31) are symmetrically disposed with respect to a central axis of the first through hole (11); characterized in that : the carrier (2) comprises a second through hole (21), the second through hole (21) forms an accommodating cavity, and the function device is disposed in the accommodating cavity; and in a case of applying a voltage to the electrically drive piece (31), the electrically drive piece (31) deforms and drives the carrier (2) to move along an axial direction of the second through hole (21); the drive apparatus comprises a housing, wherein the annular structure member is fixedly disposed at the housing, the fixed assembly (1) further comprises a fixed member, the fixed member is disposed at an inner wall of the first through hole (11), and the number of the fixed members is the same as the number of the electrically drive pieces (31), and each of the electrically drive pieces (31) is connected to the annular structure member through one of the fixed members; the fixed member comprises an upper gasket and a lower gasket, and the upper gasket and the lower gasket are respectively in contact with a first surface and a second surface of the electrically drive piece (31), wherein the drive apparatus further comprises a circuit board, wherein the circuit board is disposed at a gap between the housing and the annular structure member, and the fixed member is electrically connected to the circuit board, and wherein in a case that the fixed member is electrically conducted with the circuit board, polarity of voltages applied to the upper gasket and the lower gasket is opposite, so that polarity of voltages applied to the first surface and the second surface of the electrically drive piece (31) is opposite, so as to deform the electrically drive piece (31) to drive the carrier (2) to move.
  2. The drive apparatus according to claim 1, wherein in a case that a voltage applied to the ion conduction drive piece is a first voltage, the ion conduction drive piece drives the carrier (2) to move along a first direction by a first distance; and in a case that a voltage applied to the ion conduction drive piece is a third voltage, the ion conduction drive piece drives the carrier (2) to move along the first direction by a second distance; and wherein polarities of the first voltage and the third voltage are the same, the third voltage is greater than the first voltage, and the first distance is different from the second distance.
  3. The drive apparatus according to claim 1, wherein in a case that a voltage applied to the ion conduction drive piece is a first voltage, the ion conduction drive piece drives the carrier (2) to move along a first direction at a first speed; and in a case that a voltage applied to the ion conduction drive piece is a third voltage, the ion conduction drive piece drives the carrier (2) to move along the first direction at a second speed; and wherein polarities of the first voltage and the third voltage are the same, the third voltage is greater than the first voltage, and the first speed is different from the second speed.
  4. A camera module, characterized by comprising a first drive apparatus (A1), the first drive apparatus (A1) being the drive apparatus according to any one of claims 1-3.
  5. The camera module according to claim 4, wherein a function device carried by a carrier (2) in the first drive apparatus is a first lens or a first lens group, the camera module further comprises a second drive apparatus (A2), the second drive apparatus (A2) is the drive apparatus according to any one of claims 1-7, and a function device carried by a carrier (2) in the second drive apparatus (A2) is a second lens or a second lens group.
  6. The camera module according to claim 5, wherein the first lens or the first lens group is a zoom lens group, and the zoom lens group comprises two aspherical lenses; and in a case of applying a voltage to an electrically drive assembly (3) of the first drive apparatus, the electrically drive assembly (3) generates deformation to drive the carrier (2) in the first drive apparatus to move, so as to move the zoom lens group.
  7. The camera module according to claim 5, wherein the second lens or the second lens group is a compensating lens group, and the compensating lens group comprises an aspherical lens; and in a case of applying a voltage to an electrically drive assembly (3) of the second drive apparatus (A2), the electrically drive assembly (3) generates deformation to drive the carrier (2) in the second drive apparatus (A2) to move, so as to move the compensating lens group, to compensate for image surface movement caused by the movement of the zoom lens group.
  8. The camera module according to claim 5, further comprising a prism, wherein the prism is disposed in front of the first lens or the first lens group on an optical path of the camera module; or the camera module further comprises a rear fixed group, wherein the rear fixed group is disposed behind the second lens or the second lens group on the optical path; or the camera module further comprises a color filter, wherein the color filter is disposed behind the rear fixed group on the optical path; or the camera module further comprises a photosensitive chip, wherein the photosensitive chip is disposed behind the color filter on the optical path.
  9. An electronic device, characterized by comprising the drive apparatus according to any one of claims 1-3.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202010536062.X filed on June 12, 2020. TECHNICAL FIELD This application relates to the field of electronic devices, and in particular, to a drive apparatus, a camera module, and an electronic device. BACKGROUND At present, with the development of electronic devices, people often photograph images through the electronic devices. With the improvement of demands of people, the quality requirements of images are also higher and higher. A drive structure in a camera module of the electronic device can drive a lens to move to realize an automatic focusing function, so as to photograph a clearer image. A conventional drive apparatus uses a magnetoelectric structure to implement the driving of the drive apparatus; however, the magnetoelectric structure would interfere with the electronic devices around the drive apparatus and affect performances of the electronic devices. US 2017/059812A1 provides an imaging apparatus and a method for operating the same, and more particularly, provides a high-speed lens moving technique capable of effective multi-view angle and multi-focus images for a short period of time and an image photographing and sorting technique according the high-speed lens moving technique. Accordingly, the movement of lenses is performed using a new technique without applying the existing slow lens moving technique performed using a motor, etc., so that it is possible to acquire multi-view angle and multi-focus images using one imaging apparatus for a short period of time. JP 2007094237A provides a driving device whose driving sound is restrained, a light adjusting device which adjusts light quietly, and a photographing device which performs photography quietly. The driving device for driving the focus lens 23 of an optical system where the focus lens 23 is driven to adjust a focus includes: a motor for focus 182 driving the focus lens 23; and a polymer actuator 500 for driving the focus lens 23 and obtaining higher adjusting accuracy than focus adjusting accuracy obtained by the motor for focus 182. EP 3078703A1 provides an ion conductive film contains an ion conductive macromolecular material, a carbon material, and an electrically conductive material different from the carbon material. US 2012/249868 A1 provides a lens module. The lens module includes a lens body; a lens holding member that movably holds the lens body along an optical axis of the lens body without tilting the optical axis; a displacement element that has a flat-plate shape of which one end edge on a side of the lens body along the optical axis is disposed as a free end and the free end is displaced to freely approach the lens body by applying a voltage; and a push-up member that is disposed on the free end of the displacement element and is inserted on one end surface side of the lens body, which is perpendicular to the optical axis, by the approach towards the lens body of the displacement element so as to push up the lens body in the optical axis direction. US 2007/285558 A1 provides an optical unit and image pickup apparatus capable of performing "auto focus function" and "image shake correction function" and characterized by easy assembling, compact configuration, high performance and reduced costs. The optical unit and image pickup apparatus are provided with a polymer actuator to move an optical device, whereby performing auto focus function and image shake correction function can be performed. The polymer actuator is provided with electric wirings for image pickup device, thereby reducing the number of circuit board used for electric wiring of the image pickup device, with the result that an optical unit and image pickup apparatus characterized by easy assembling, compact configuration, high performance and reduced costs are provided. EP 2413172A1 provides a lens and a camera. The lens module includes: a lens forming an image of an object; a lens holder to hold an outer peripheral side of the lens to allow reciprocal movement in an optical axis direction of the lens; a housing at least one end side of which is opened, which includes a cylindrical receiving part having an inner surface, one surface of which, at a lateral side, contacts one surface of the lens holder at the lateral side perpendicular to the optical axis direction, and which receives the lens holder in the receiving part to allow reciprocal movement in the optical axis direction of the lens and in a sliding state; and an actuator part including a movable part which is displaced by a displacement amount corresponding to a level of an applied drive voltage and reciprocates the lens holder received in the housing between a first position and a second position in the optical axis direction. KR20100019688A provides a driving actuator complying a carbon nano tube is provided to implement an auto focus control function and stabilization by supplying different volta