Optical element driving mechanism

Abstract

The utility model discloses a kind of optical element driving mechanisms, including lens drive assembly, movable element and first capacitor, lens drive assembly includes motor and bottom plate, the motor is used to drive lens movement along optical axis direction, the bottom end of the motor is equipped with light-avoiding hole.The bottom plate is located the bottom surface of the motor and is connected with the bottom end of the motor.The movable element is movably connected with the top surface of the bottom plate and top surface is equipped with image sensor, the image sensor is located below the light-avoiding hole, for receiving the imaging information of the lens.The first capacitor includes first electrode sheet and two first sensing sheet, one of the first electrode sheet and two first sensing sheet is connected with the lens drive assembly, another is connected with the top surface of the movable element.The utility model utilizes movable element and motor cooperation to realize anti-shake, movable element is located at the bottom of motor, movable element movement process does not affect the operation of carrier, and precision anti-shake can be realized.

Description

Technical Field

[0001] This utility model relates to the field of optical element driving technology, and in particular to an optical element driving mechanism. Background Technology

[0002] With the development of technology, many electronic devices today (such as tablets or smartphones) are equipped with lens modules, enabling them to take photos or record videos. When users use electronic devices with lens modules, shaking may occur, resulting in blurry images captured by the lens module. However, as people's demands for image quality increase, the image stabilization function of lens modules is becoming increasingly important.

[0003] Current image stabilization technologies rely on an external frame mounted on the lens mount, with image stabilization achieved through frame movement. Since the frame is external to the mount, its movement can interfere with the mount's operation, limiting the stabilization effect. Therefore, image stabilization devices with optical element drive mechanisms are needed. Utility Model Content

[0004] The purpose of this invention is to provide an optical element driving mechanism to solve the problems of the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides an optical element driving mechanism, comprising:

[0006] A motor is provided at the bottom of the motor to drive the lens to move along the optical axis.

[0007] A movable component, movably connected to the bottom surface of the motor and with an image sensor mounted on its top surface, the image sensor being located below the light-blocking hole and used to receive imaging information from the lens; and

[0008] The first capacitor includes a first electrode plate and two first sensing plates, one of which is connected to the motor and the other is connected to the top surface of the moving part.

[0009] In one embodiment, the first electrode plate is connected to the bottom surface of the motor, and the two first sensing plates are connected to the top surface of the moving part; or

[0010] The first electrode plate is connected to the top surface of the movable component, and the two first sensing plates are connected to the bottom surface of the motor.

[0011] In one embodiment, the optical element driving mechanism further includes a second capacitor, the second capacitor including a second electrode sheet and two second sensing sheets, the second electrode sheet and the second sensing sheets extending in the same direction, the first electrode sheet and the first sensing sheet extending in the same direction, and the extending directions of the first electrode sheet and the second electrode sheet perpendicular to each other.

[0012] One of the second electrode and the two second sensors is connected to the lens drive assembly, and the other is connected to the top surface of the movable member. That is, the second electrode is connected to the lens drive assembly and the two second sensors are connected to the movable member, or the second electrode is connected to the movable member and the two second sensors are connected to the lens drive assembly.

[0013] In one embodiment, the second electrode plate is connected to the bottom surface of the motor, and the two second sensing plates are connected to the top surface of the moving part; or

[0014] The second electrode plate is connected to the top surface of the movable component, and the two second sensing plates are connected to the bottom surface of the motor.

[0015] In one embodiment, the motor further includes a base plate and a lens drive assembly.

[0016] The base plate is connected to the bottom surface of the lens drive assembly;

[0017] The movable component is movably connected to the base plate.

[0018] In one embodiment, the first electrode sheet is connected to the top surface of the base plate, and the two first sensing sheets are connected to the bottom surface of the movable member; or

[0019] The first electrode sheet is connected to the bottom surface of the movable component, and the two first sensing sheets are connected to the top surface of the base plate.

[0020] In one embodiment, the first electrode is connected to the bottom surface of the lens drive assembly, and the two first sensing plates are connected to the top surface of the movable member; or

[0021] The first electrode sheet is connected to the top surface of the movable component, and the two first sensing sheets are connected to the bottom surface of the lens drive assembly.

[0022] In one embodiment, the second electrode sheet is connected to the top surface of the base plate, and the two second sensing sheets are connected to the bottom surface of the movable component; or

[0023] The second electrode plate is connected to the bottom surface of the movable part, and the two second sensing plates are connected to the top surface of the base plate.

[0024] In one embodiment, the second electrode is connected to the bottom surface of the lens drive assembly, and the two second sensing plates are connected to the top surface of the movable component; or

[0025] The second electrode is connected to the top surface of the movable component, and the two second sensing plates are connected to the bottom surface of the lens drive assembly.

[0026] In one embodiment, the optical element driving mechanism includes a built-in circuit that is electrically connected to the first capacitor and the second capacitor.

[0027] In one embodiment, the optical element driving mechanism further includes a control chip electrically connected to built-in circuitry.

[0028] In one embodiment, the control chip is located on the motor.

[0029] In one embodiment, the built-in wiring extends to the outside of the motor and is electrically connected to the control chip.

[0030] In one embodiment, the motor includes:

[0031] The base is provided with the light-blocking hole;

[0032] A carrier, which is movably connected to the base, is used to mount the lens;

[0033] An elastic element is connected to the carrier and the base and is used to drive the carrier to reset.

[0034] This invention utilizes a movable component and a motor to achieve anti-shake performance. The movable component is located at the bottom of the motor, and its movement will not affect the operation of the carrier. Furthermore, a first capacitor and a second capacitor are set to detect the displacement of the movable component, enabling precise anti-shake performance. Attached Figure Description

[0035] Figure 1 This is a perspective view of an optical element driving mechanism according to an embodiment of the present invention.

[0036] Figure 2 yes Figure 1 The illustrated embodiment shows an assembly diagram of the moving parts, the first capacitor, the second capacitor, the built-in circuitry, and the control chip.

[0037] Figure 3 yes Figure 2 The illustrated embodiment shows an assembly diagram of the first capacitor, the second capacitor, the built-in circuitry, and the control chip.

[0038] Figure 4 This is a perspective view of the base plate and movable parts in one embodiment of this utility model.

[0039] Figure 5 Figure 4 An assembly diagram of the first electrode plate of the first capacitor and the second electrode plate of the second capacitor in the illustrated embodiment.

[0040] Figure 6 yes Figure 4 The illustrated embodiment shows an assembly diagram of the first capacitor, the second capacitor, the built-in circuitry, and the control chip.

[0041] Figure 7 This is a perspective view of the optical element driving mechanism of another embodiment of the present invention.

[0042] Figure 8 yes Figure 7 The illustrated embodiment is an assembly diagram of the active component, the first capacitor, the second capacitor, and the built-in circuitry.

[0043] Figure 9 yes Figure 7 An assembly diagram of the first capacitor, the second capacitor, and the built-in circuitry in the illustrated embodiment.

[0044] Figure 10 This is a perspective view of the base plate and movable parts in another embodiment of this utility model.

[0045] Figure 11 yes Figure 10 An assembly diagram of the first electrode plate of the first capacitor and the second electrode plate of the second capacitor in the illustrated embodiment.

[0046] Figure 12 yes Figure 10 An assembly diagram of the first capacitor, the second capacitor, and the built-in circuitry in the illustrated embodiment.

[0047] Reference numerals: 100, Lens drive mechanism; 1, Motor; 2, Moving part; 21, Image sensor; 3, First capacitor; 31, First electrode plate; 32, First sensing plate; 4, Second capacitor; 41, Second electrode plate; 42, Second sensing plate; 5, Base plate; 6, Control chip; 7, Built-in circuit; 8, Lens;

[0048] Specific implementation methods in the examples

[0049] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0050] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0051] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the purpose, features, and advantages of this utility model. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of this utility model, but are merely illustrative of the essential spirit of the technical solution of this utility model.

[0052] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0053] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0054] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0055] This utility model relates to an optical element driving mechanism, which includes a motor 1, a movable part 2, a first capacitor 3, and a second capacitor 4.

[0056] The motor 1 drives the lens 8 to move along the optical axis. Specifically, the motor 1 includes a lens drive assembly, which comprises a base, a carrier, a housing, and an elastic element. The carrier is located on the top surface of the base and is movably connected to the base along the optical axis of the lens 8. In one embodiment, the base is provided with a magnet assembly, and the carrier is provided with a coil assembly. The coil assembly and the magnet assembly cooperate to drive the carrier to move along the optical axis to adjust the focal length.

[0057] The base is equipped with a light-blocking hole located below the lens 8, allowing light to enter the lens 8 and be projected onto the movable part 2.

[0058] The outer shell covers the carrier and is fixedly connected to the base. The outer shell is also provided with a light-blocking hole, so that external light can enter the lens 8 and be projected onto the movable part 2 through the lens 8.

[0059] Of course, in some embodiments, the base may not be provided, the carrier and the shell may be movably connected, and the movable part 2 may be movably connected to the bottom of the shell.

[0060] exist Figure 1-3 In the embodiment shown, the movable part 2 is movably connected to the base or housing of the lens driving assembly. Specifically, the movable part 2 can be movably connected to the lens driving assembly by means of a magnet and a coil. For example, the magnet can be set on the movable part 2, and the coil can be set on the base or housing. The coil and the magnet can cooperate to drive the movable part 2 to move in a first direction or a second direction. The movable part 2 can be elastically connected to the base of the lens driving assembly by a spring wire, and the spring wire can drive the movable part 2 to reset.

[0061] Of course, in other embodiments, the movable component 2 can also be mounted on the electronic device via ball bearings, with the housing of the lens drive assembly covering the movable component 2, and the carrier located above the movable component 2. The movable component 2 can move within the lens drive assembly along a first direction or a second direction. This invention does not limit the specific movable connection method between the lens drive assembly and the movable component 2.

[0062] An image sensor 21 is provided on the top surface of the movable component 2. The image sensor 21 is located below the light-blocking hole and is used to receive imaging information from the lens 8. The movable component 2 moves along the first direction or the second direction, which can drive the image sensor 21 to move along the first direction or the second direction, ensuring that the image sensor 21 is aligned with the lens 8 along the optical axis, thereby preventing lens 8 from shaking.

[0063] The first capacitor 3 includes a first electrode plate 31 and two first sensing plates 32. One of the first sensing plates 32 is a transmitting sensing plate, and the other is a receiving sensing plate. The transmitting sensing plate emits a signal, which is reflected by the first electrode plate 31 and received by the receiving sensing plate. When the position of the first electrode plate 31 moves, its reflected signal also changes, thereby causing a change in the capacitance value between the two sensing plates.

[0064] exist Figure 1-3 In the embodiment shown, the first electrode sheet 31 is laid flat on the bottom surface of the base, while the two first sensing sheets 32 are disposed on the top surface of the movable member 2.

[0065] Of course, in other embodiments, the first electrode sheet 31 is laid flat on the top surface of the movable member 2, while the two first sensing sheets 32 are on the same plane and installed on the bottom surface of the base of the lens drive assembly, with the first electrode sheet 31 located in the middle of the two first sensing sheets 32.

[0066] As a preferred embodiment, the optical element driving mechanism further includes a second capacitor 4. The second capacitor 4 has the same structural principle as the first capacitor 3, including a second electrode sheet 41 and two second sensing sheets 42. The difference is that the extension direction of the second electrode sheet 41 and the second sensing sheet 42 is perpendicular to the extension direction of the first electrode sheet 31 and the first sensing sheet 32. That is to say, the first electrode sheet 31 and the two first sensing sheets 32 extend along the first direction, while the second electrode sheet 41 and the two second sensing sheets 42 extend along the second direction.

[0067] The first capacitor can detect the displacement of the moving part along a first direction, and the second capacitor can detect the displacement of the moving part along a second direction. By using the first and second capacitors in conjunction, the displacement of the moving part along the first and second directions can be detected. The first and second directions are perpendicular to the optical axis of the lens. Since the first and second capacitors are relatively light, they have virtually no impact on the movement of the moving part, thus improving the flexibility of the moving part's movement.

[0068] exist Figure 1-3 In the illustrated embodiment, two second sensing plates 42 are located on the top surface of the movable member 2, while the second electrode plate 41 is located on the bottom surface of the base.

[0069] Of course, in other embodiments, the second electrode sheet 41 is laid flat on the top surface of the movable member 2, while the two second sensing sheets 42 are on the same plane and mounted on the bottom surface of the base of the lens drive assembly, with the second electrode sheet 41 located in the middle of the two second sensing sheets 42.

[0070] exist Figure 4-6 In the illustrated embodiment, the motor 1 further includes a base plate 5, which is connected to the bottom surface of the lens drive assembly. Specifically, the base plate 5 is located below the base and the housing, and can be spaced apart from the base by a number of support columns.

[0071] The movable component 2 is located between the base plate 5 and the base and is movably connected to the base plate 5. In one embodiment, the movable component 2 can be rollably connected to the base plate 5 via ball bearings, and can be driven to move along a first direction or a second direction by a magnet or coil.

[0072] In this embodiment, the first electrode plate 31 is connected to the top surface of the base plate 5, while the two first sensing plates 32 are connected to the bottom surface of the movable member 2. The second electrode plate 41 is connected to the top surface of the base plate 5, while the two second sensing plates 42 are connected to the bottom surface of the movable member 2.

[0073] Alternatively, the first electrode 31 is connected to the bottom surface of the movable member 2, and the two first sensing plates 32 are connected to the top surface of the base plate 5. The second electrode 41 is connected to the top surface of the base plate 5, and the two second sensing plates 42 are connected to the bottom surface of the movable member 2.

[0074] Of course, in another embodiment, the first electrode plate 31 can also be connected to the bottom surface of the base, while the two first sensing plates 32 are connected to the top surface of the movable member 2. The second electrode plate 41 is connected to the bottom surface of the movable member 2, and the two second sensing plates 42 are connected to the top surface of the base plate 5.

[0075] In other words, one of the first sensing plate 32 and the first electrode plate 31 needs to be connected to the lens drive assembly or the base plate 5, and the other needs to be connected to the corresponding position of the movable member 2. Similarly, one of the second sensing plate 42 and the second electrode plate 41 needs to be connected to the lens drive assembly or the base plate 5, and the other needs to be connected to the corresponding position of the movable member 2. Multiple configurations are possible.

[0076] The optical element driving mechanism also includes a control chip 6 and a built-in circuit 7. The built-in circuit 7 is electrically connected to the first sensing element 32 of the first capacitor 3 and the second sensing element 42 of the second capacitor 4. The control chip 6 is electrically connected to the built-in circuit 7. In other words, the control chip 6 is electrically connected to the first capacitor 3 and the second capacitor 4, and can monitor the capacitance values ​​of the first capacitor 3 and the second capacitor 4 to achieve closed-loop control.

[0077] exist Figure 1-3 In the embodiment shown, the built-in circuit 7 is disposed on the top surface of the movable part 2, and the control chip 6 is located inside the motor 1 and connected to the base plate 5.

[0078] Figure 4-6 In the embodiment shown, the built-in circuit 7 is embedded in the base plate 5 and connected to the control chip 6, the first capacitor, and the second capacitor 4.

[0079] Figure 7-9 The illustrated embodiments and Figure 1-3 The embodiments shown are basically the same, except that the built-in circuit 7 is embedded in the top surface of the movable part 2 and extends to the outside of the motor 1, and is electrically connected to the external control chip 6.

[0080] Figure 10-12 and Figure 4-6 The embodiments shown are basically the same, except that the built-in circuit 7 is embedded in the base plate 5 and extends to the outside of the motor 1, and is electrically connected to the external control chip 6.

[0081] This invention utilizes a movable component and a motor to achieve anti-shake performance. The movable component is located at the bottom of the motor, and its movement does not affect the operation of the carrier. Furthermore, a first capacitor and a second capacitor are set to detect the displacement of the movable component, enabling precise anti-shake performance.

[0082] The preferred embodiments of the present invention have been described in detail above, but it should be understood that, if necessary, aspects of the embodiments can be modified to utilize aspects, features, and concepts from various patents, applications, and publications to provide other embodiments.

[0083] In light of the detailed description above, these and other changes can be made to the embodiments. Generally, the terminology used in the claims should not be considered limited to the specific embodiments disclosed in the specification and claims, but should be understood to include all possible embodiments together with the full scope of equivalents enjoyed by these claims.

[0084] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An optical element driving mechanism, characterized in that, include: A motor is provided at the bottom of the motor to drive the lens to move along the optical axis. A movable component is movably connected to the bottom surface of the motor and has an image sensor mounted on its top surface. The image sensor is located below the light-blocking hole and is used to receive imaging information from the lens. as well as The first capacitor includes a first electrode plate and two first sensing plates, one of which is connected to the motor and the other is connected to the top surface of the moving part.

2. The optical element driving mechanism according to claim 1, characterized in that, The first electrode plate is connected to the bottom surface of the motor, and the two first sensing plates are connected to the top surface of the movable component; or The first electrode plate is connected to the top surface of the movable component, and the two first sensing plates are connected to the bottom surface of the motor.

3. The optical element driving mechanism according to claim 1, characterized in that, The optical element driving mechanism further includes a second capacitor, which includes a second electrode sheet and two second sensing sheets. The second electrode sheet and the second sensing sheets extend in the same direction, and the first electrode sheet and the first sensing sheet extend in the same direction. The extension directions of the first electrode sheet and the second electrode sheet are perpendicular to each other. One of the second electrode sheet and the two second sensing sheets is connected to the lens drive assembly, and the other is connected to the top surface of the moving part.

4. The optical element driving mechanism according to claim 3, characterized in that, The second electrode plate is connected to the bottom surface of the motor, and the two second sensing plates are connected to the top surface of the moving part; or The second electrode plate is connected to the top surface of the movable component, and the two second sensing plates are connected to the bottom surface of the motor.

5. The optical element driving mechanism according to claim 3, characterized in that, The motor also includes a base plate and a lens drive assembly. The base plate is connected to the bottom surface of the lens drive assembly; The movable component is movably connected to the base plate.

6. The optical element driving mechanism according to claim 5, characterized in that, The first electrode plate is connected to the top surface of the base plate, and the two first sensing plates are connected to the bottom surface of the movable component; or The first electrode sheet is connected to the bottom surface of the movable component, and the two first sensing sheets are connected to the top surface of the base plate.

7. The optical element driving mechanism according to claim 5, characterized in that, The first electrode is connected to the bottom surface of the lens driving assembly, and the two first sensing plates are connected to the top surface of the movable component; or The first electrode sheet is connected to the top surface of the movable component, and the two first sensing sheets are connected to the bottom surface of the lens drive assembly.

8. The optical element driving mechanism according to claim 5, characterized in that, The second electrode plate is connected to the top surface of the base plate, and the two second sensing plates are connected to the bottom surface of the movable component; or The second electrode plate is connected to the bottom surface of the movable part, and the two second sensing plates are connected to the top surface of the base plate.

9. The optical element driving mechanism according to claim 5, characterized in that, The second electrode is connected to the bottom surface of the lens drive assembly, and the two second sensing plates are connected to the top surface of the movable component; or The second electrode is connected to the top surface of the movable component, and the two second sensing plates are connected to the bottom surface of the lens drive assembly.

10. The optical element driving mechanism according to claim 3, characterized in that, The optical element driving mechanism includes a built-in circuit that is electrically connected to the first capacitor and the second capacitor.

11. The optical element driving mechanism according to claim 10, characterized in that, The optical element driving mechanism also includes a control chip, which is electrically connected to the built-in circuitry.

12. The optical element driving mechanism according to claim 11, characterized in that, The control chip is located on the motor.

13. The optical element driving mechanism according to claim 11, characterized in that, The built-in wiring extends to the outside of the motor and is electrically connected to the control chip.

14. The optical element driving mechanism according to claim 1, characterized in that, The motor includes: The base is provided with the light-blocking hole; A carrier, which is movably connected to the base, is used to mount the lens; An elastic element is connected to the carrier and the base and is used to drive the carrier to reset.

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