TWI465789B - Resonance Suppression Method and Structure of Anti - Shot Lens Focusing Module - Google Patents

Description

Anti-shake lens focus module resonance suppression method and structure thereof

The invention relates to a resonance suppression method and structure of an anti-shake lens focusing module, in particular to a resonance which can suppress the displacement caused by the anti-shock structure and the lens autofocus structure, and suppresses and externally The resonant frequency generated by the vibration frequency of the environment and the control frequency of the control IC achieves a method of stabilizing the normal operation of the overall anti-shake focus module.

Since the handheld device has a camera function, the lens-proof module with anti-shake function has been gradually used in high-end handheld devices, because there are quite a lot of lens focusing modules for anti-shake function. Patent application, such as the patent application of the invention of the invention of the invention No. 098138999, "Image autofocus structure with anti-shake", and the patent application of "Invention of the lens autofocus module" of the domestic invention No. 099104936 and National Patent No. 099135166 "Anti-shake tilt correction structure of autofocus module" patent application.

However, the lens autofocus structure will slightly vibrate when the focus moves to the position, and then slowly reach the steady state from the dynamic. The time required from dynamic to steady state is called dynamic response time (Response Time). In this case, the applicant also applied for the national invention No. I325085 for approval of how to suppress the dynamic response time due to the wobbling phenomenon on the lens focusing module, and approved the case.

However, in the anti-shake structure, slight fluttering occurs due to the displacement correction action of the image, and since the focusing action and the anti-shake action are simultaneously performed during imaging, the chattering phenomenon between the two may be due to the environment. Inter-resonance interaction occurs, and the anti-shake structure and the focusing structure will also resonate due to the interaction between the control frequency of the control IC and the vibration frequency of the external environment, resulting in failure or abnormality of the overall anti-shake focus module.

For example, in a moving car, the vibration frequency of the car, the hand vibration frequency when the camera is photographed by the camera, the focus flutter frequency of the lens focusing structure, and the image correction flutter frequency of the anti-shake structure, the four vibration frequencies are simultaneously generated. At the same time, the resonance mode may be caused by the similar vibration frequency, so that the overall anti-shake focus module fails to operate correctly and fails.

Since this resonance mode will have a great influence on the operation of the overall anti-shake focus module, it is necessary to suppress this resonance mode in order to make the overall anti-shake focus module operate normally. Therefore, the inventor of the present invention proposes a resonance suppression method and structure of an anti-shake lens focusing module, and a shock-absorbing material is added to the lens focusing structure and the anti-shock structure to suppress possible resonance. phenomenon.

The main technical feature of the present invention is to provide a method for suppressing the resonance of the anti-shake lens focusing module. The method firstly includes a first movable portion and a first non-movable portion in a lens focusing structure, and the first movable portion can be Carrying a lens to perform a focusing operation along a ray axial direction; and then providing a second anti-shock structure having a second movable portion and a second non-movable portion, wherein the second movable portion can perform a photo-correcting action; then adding at least a shock absorbing material between the first movable portion and the first non-movable portion, and between the second movable portion and the second non-movable portion; finally using the shock absorbing material to absorb the first movable portion due to the action The vibration is generated and the vibration of the second movable portion due to the operation is absorbed to suppress resonance of the first movable portion and the second movable portion due to the operation.

The second technical feature of the present invention is to provide an anti-shake lens focusing module for suppressing resonance. The module includes at least: a lens focusing structure having a first movable portion and a first movable portion. The movable portion can carry a lens to perform a focusing operation along a ray axial direction; an anti-shock structure has a second movable portion and a second non-movable portion, and the second movable portion can perform a shadow correction motion At least one shock absorbing material is added between the first movable portion and the first non-movable portion, and is added between the second movable portion and the second non-movable portion for absorbing the first movable portion due to the action The vibration is generated and the vibration of the second movable portion due to the operation is absorbed to suppress resonance of the first movable portion and the second movable portion due to the operation.

The detailed description of the present invention and the accompanying drawings are not to be construed as limiting the invention.

FIG. 1 is a perspective exploded view of an embodiment of the anti-shake lens focusing module of the present invention. The anti-shake lens focusing module of the present invention includes at least an outer frame 10, a lens focusing structure 20, and an anti-handle. The shock structure 30 and an image sensing component 40, wherein the lens focusing structure 20, the anti-shock structure 30 and the image sensing component 40 are all located in a ray axial direction.

An upper plate 11 is disposed on the outer frame 10; and the lens focusing structure 20 can carry an action of autofocusing the lens 21 along the axial direction (z axis) to focus the image on the sensing component 40. The anti-shock structure 30 performs an image correcting action perpendicular to the ray axis (x-axis or y-axis); and the image sensing element 40 is disposed on a carrier substrate 41.

The method for suppressing resonance of the present invention mainly comprises two parts. The first part is to suppress the vibration generated when the focusing structure 20 of the lens performs the focusing operation. The components of the focusing structure 20 of the lens can be divided into a first movable part and a first non- The movable portion is mainly provided with at least one shock absorbing material, such as a soft gel, a soft spring, a soft rubber or a vibration absorbing tape, between the first movable portion and the first non-movable portion, and the shock absorbing material is used to absorb the first portion. The movable portion is oscillated during operation to suppress the resonance frequency of the first movable portion due to the operation, which will be described below by way of an embodiment.

The second part is to suppress the vibration generated when the anti-shock structure 30 performs the image correcting action. The component of the anti-shake structure 30 can also be divided into a second movable part and a second non-movable part, and the same is At least the shock absorbing material, such as a soft gel, a soft spring, a soft rubber or a shock absorbing tape, is added between the second movable portion and the second movable portion, and the shock absorbing material absorbs the vibration caused by the action of the second movable portion. In order to suppress the resonance frequency which may be generated by the second movable portion due to the operation, three embodiments will be respectively described below.

Referring to FIG. 2, it is a side cross-sectional view of the first embodiment of the present invention. Referring to FIG. 1 together, in the embodiment, the first movable portion of the lens focus driving structure 20 is used to carry the The lens 21 performs an autofocus operation. Preferably, the lens focusing structure 20 includes at least one lens carrier 22 and a frame 23, wherein the lens carrier 21 is mounted at the center of the lens carrier 22, and the lens carrier 22 is covered with a coil 24, and the lens carrier 22 Both the lens carrier 22 and the coil 24 can be used as components of the first movable portion.

The center of the frame 23 can accommodate the lens carrier 22, and the side edge of the frame 23 is embedded with four magnetic elements 25 corresponding to the outer side of the coil 24, and the magnetic elements 25 do not contact the coil 24, and the Both the lens holder 22 and its connecting member can serve as the first non-movable portion.

Wherein the side edge of the magnetic element 25 and the coil 24, that is, between the first movable portion and the first non-movable portion, may be used to join the shock absorbing material, preferably on the peripheral side edge of the frame 23. A plurality of accommodating notches (not shown) are provided for accommodating the shock absorbing material 50 such that the shock absorbing materials 50 are connected between the frame 23 and the coil 24.

In the first embodiment of the anti-shake structure of the present invention, the outer frame 10 serves as a second non-movable portion of the anti-shake structure, and the outer frame 10 connects the lens focusing structure 20 and the carrier substrate of the image sensing element 40. 41.

The second movable portion of the anti-shock structure 30 is provided with a lens frame 31 on which a correcting lens 32 is disposed, and the second movable portion and the second non-movable portion are connected by at least one flexible element. The present embodiment is connected between the lens frame 31 and the upper frame 11 of the outer frame 10. Preferably, the flexible component can be four suspension wires 33 or a spring piece, so that the correction lens 32 can be set. The image sensing element 40 is suspended above the axial direction of the light to correct the image shift caused by the jitter.

Preferably, the anti-shock structure 30 further includes a magnet assembly 34 and a coil assembly 35, wherein the magnet assembly 34 includes at least one x-axis magnet 34x and at least one y-axis magnet 34y, and the coil assembly 35 includes At least one x-axis coil 35x and at least one y-axis coil 35y are associated with the magnet assembly 34 without contact.

One of the magnet assembly 34 and the coil assembly 35 is connected to the second movable portion, and the other is connected to the second non-movable portion. The magnet assembly 34 and the coil assembly 35 correspond to each other. Between the two, the shock absorbing material 50 can be added to cause the shock absorbing material 50 to suppress resonance which may occur in the two movable portions.

Referring to FIG. 3, it is a side cross-sectional view of a second embodiment of the anti-shake structure of the present invention. In the embodiment, the outer frame 10 is also used as the second immovable portion of the anti-shock structure 30. The outer frame 10 is connected to the carrier substrate 41 of the image sensing component 40, and the lens focusing structure 20 can be accommodated therein.

The anti-shock structure 30 further includes at least one flexible element connected between the second movable portion and the second non-movable portion. In the embodiment, the flexible element is coupled to the lens focusing structure 20 Between the upper plate 11 of the outer frame 10 and the upper portion 11 of the lens focusing structure 20, the second movable portion of the anti-shock structure 30 is the second movable portion.

Preferably, the flexible component can be four suspension wires 33 (as shown in FIG. 3) or a spring piece 36. FIG. 4 is a schematic perspective cross-sectional view of the elastic piece as a flexible element, and the elastic piece 36 focuses the lens. The structure 20 is suspended in the axial direction of the light inside the outer frame 10 such that the first immovable portion of the lens focusing structure 20 becomes the second movable portion.

5 is a perspective view of the embodiment of the elastic piece 36. The elastic piece 36 includes a peripheral fixing portion 361, an outer movable portion 362 and an inner layer movable portion 363. The outer peripheral fixing portion 361 is fixedly connected to The outer frame 10 is upper plate 11; the outer movable portion 362 is a channel having a double U-shaped opening opposite to each other, and is disposed in the inner periphery of the outer peripheral fixing portion 361, and is connected to the two sets of symmetrical first fulcrums 364. The outer peripheral fixing portion 361 is located in the inner periphery of the outer layer movable portion 362, and is also in the shape of a double-shaped opening opposite to each other, and is opposite to the double-shaped groove of the outer movable portion 362. The 90 degree angular position is coupled to the outer movable portion 362 at a 90 degree angular position relative to the first fulcrum 364 by two sets of symmetrical second fulcrums 365, and the inner movable portion 363 is coupled to the lens focus mode. Group 20.

Referring to FIG. 4 again, the outer movable portion 362 can cause the lens focusing module 20 to perform an x-axis displacement of the tilting swing, and the inner movable portion 363 can tilt the lens focusing module 20 to tilt. The y-axis displacement.

Preferably, the anti-shock structure 30 further includes a magnet assembly 34 and a coil assembly 35, wherein the magnet assembly 34 includes at least one x-axis magnet and at least one y-axis magnet, and the coil assembly 35 includes at least one The x-axis coil and the at least one y-axis coil are corresponding to the magnet assembly and are not in contact with each other.

One of the magnet assembly 34 and the coil assembly 35 is connected to the outer frame 10 or its connecting element as an element of the second immovable portion, such as the carrier substrate 41 of the image sensing element 40, and the other one The lens focusing module 20 is connected to the second movable portion, and the magnet assembly 34 and the coil assembly 35 are mutually coupled to each other for adding the shock absorbing material 50.

Referring to FIG. 6 , it is a side cross-sectional view of a third embodiment of the anti-shake structure of the present invention. In the embodiment, the upper panel 11 of FIG. 1 is also used as the first non-movable of the lens focusing structure 20 . The outer frame 10 is connected to the lens focusing structure 20.

The anti-shock structure 30 further includes at least one flexible component connected between the second movable portion and the second immovable portion. In this embodiment, the flexible component is connected to the image sensing component. Preferably, the flexible component can be four suspension wires 33 or an elastic piece for suspending the carrier substrate 41 from the lens focusing structure 20 between the carrier substrate 41 of the outer frame 10. The light ray in the lower direction is such that the carrier substrate 41 becomes the second movable portion.

Preferably, the anti-shock structure 30 further includes a magnet assembly 34 and a coil assembly 35, wherein the magnet assembly 34 includes at least one x-axis magnet and at least one y-axis magnet, and the coil assembly 35 includes at least one The x-axis coil and the at least one y-axis coil are corresponding to the magnet assembly and are not in contact with each other.

One of the magnet assembly 34 and the coil assembly 35 is connected to the outer frame 10 or its connecting element, such as the outer frame 10, which is the component of the second immovable portion, and the other is connected to the carrier substrate 41. As an element of the second movable portion, the magnet assembly 34 and the coil assembly 35 correspond to each other, and the shock absorbing material 50 can be added.

FIG. 7 is a side cross-sectional view showing a fourth embodiment of the anti-shake structure of the present invention. In the embodiment, the lens focusing structure 20 is connected to the lens frame 31 of the anti-shock structure 30. That is, the first movable portion and the second movable portion are connected to form a movable portion, and the first movable portion and the second movable portion form an immovable portion, so that only the magnet assembly 34 and The shock absorbing material 50 is added between the coil assembly 35 (the second movable portion and the second non-movable portion), that is, the shock absorbing material only needs to be added between the movable portion and the movable portion, so that the shock absorbing material 50 suppresses the The resonance that may be generated by the movable portion is omitted, and the shock absorbing material is omitted between the side edge of the magnetic member 25 and the coil 24 (the first movable portion and the first movable portion).

The present invention is capable of providing a design that is quite different from the prior art by the above-mentioned disclosed technology, which can improve the overall use value, and is not found in the publication or public use before the application, and has already met the requirements of the invention patent. , 提出 filed an invention patent application in accordance with the law.

10. . . Outer frame

11. . . On board

20. . . Lens focusing structure

twenty one. . . Lens

twenty two. . . Lens carrier

twenty three. . . frame

twenty four. . . Coil

25. . . Magnetic component

30. . . Anti-shock structure

31. . . Lens holder

32. . . Correction lens

33. . . Suspension line

34. . . Magnet assembly

34x. . . X-axis magnet

34y. . . Y-axis magnet

35. . . Coil assembly

35x. . . X-axis coil

35y. . . Y-axis coil

36. . . shrapnel

361. . . Peripheral fixation

362. . . Outer activity department

363. . . Inner activity department

364. . . First point

365. . . Second pivot

40. . . Image sensing component

41. . . Carrier substrate

50. . . Shock absorbing material

FIG. 1 is a perspective exploded view of an embodiment of the anti-shake lens focusing module of the present invention.

2 is a side cross-sectional view showing the first embodiment of the lens focusing module and the anti-shocking structure of the present invention.

Figure 3 is a side cross-sectional view showing a second embodiment of the anti-shake structure of the present invention.

Figure 4 is a schematic cross-sectional view showing a three-dimensional embodiment in which the elastic piece is a flexible member according to the present invention.

Figure 5 is a perspective view of an embodiment of the shrapnel of the present invention.

Figure 6 is a side cross-sectional view showing a third embodiment of the anti-shake structure of the present invention.

Figure 7 is a side cross-sectional view showing a fourth embodiment of the anti-shake structure of the present invention.

10. . . Outer frame

11. . . On board

twenty one. . . Lens

twenty two. . . Lens carrier

twenty three. . . frame

twenty four. . . Coil

25. . . Magnetic component

33. . . Suspension line

34. . . Magnet assembly

35. . . Coil assembly

40. . . Image sensing component

41. . . Carrier substrate

50. . . Shock absorbing material

Claims (32)

A resonance suppression method for an anti-shake lens focusing module, the method comprising at least the following steps: preparing a lens focusing structure having a first movable portion and a first non-movable portion, wherein the first movable portion carries a lens Performing a focusing operation along a ray axial direction, wherein the first movable portion is a lens carrier or a coil, the first non-movable portion is a frame or a plurality of magnetic components; and an anti-shock structure is provided, a second movable portion and a second non-movable portion, wherein the second movable portion can perform an image correcting action; adding at least one shock absorbing material between the first movable portion and the first movable portion, and the second movable portion And absorbing the vibration caused by the focusing operation of the first movable portion by using the shock absorbing material, and absorbing the vibration caused by the image correcting operation of the second movable portion, thereby suppressing the first movable portion and The resonance of the second movable portion due to the action. The resonance suppression method according to claim 1, wherein the shock absorbing material is a soft gel, a soft spring, a soft rubber or a shock absorbing tape. The resonance suppression method of claim 1, wherein the lens focusing structure comprises: the lens carrier as the first movable portion, and the center can be installed The lens is surrounded by the coil; and the frame is used as the first non-movable portion, and the lens holder is accommodated in the center, and the magnetic component is embedded in the side edge of the frame, corresponding to the outer side of the coil, And do not touch the coil. The resonance suppression method of claim 3, wherein a side wall of the frame and the lens holder are used to join the shock absorbing material. The resonance suppression method of claim 3, wherein a receiving slot is further formed on a side edge of the frame for adding the shock absorbing material. The method of claim 1, wherein the anti-shock structure comprises: an outer frame as the second non-movable portion, the outer frame is connected with the lens focusing structure; An image sensing component is disposed thereon, and the outer frame is connected to the second non-movable portion; a lens frame is provided with a correcting lens as the second movable portion; at least one flexible component is Connected between the second movable portion and the second non-movable portion for suspending the correcting lens in the axial direction of the light; a magnet assembly comprising at least one x-axis magnet and at least one y-axis magnet; a coil assembly comprising at least one x-axis coil and at least one y-axis coil, and corresponding to the magnet assembly without contact; wherein the coil assembly and the magnet assembly are connected to the second movable portion, The other is connected to the two immovable portions and is corresponding to each other for adding the shock absorbing material. The resonance suppression method of claim 6, wherein the flexible element suspends the correction lens between the lens focusing structure and the image sensing element. The resonance suppression method according to claim 6, wherein the flexible element is a plurality of suspension wires. The resonance suppression method according to claim 6, wherein the flexible member is a spring piece. The method of claim 1, wherein the anti-shock structure comprises: an outer frame as the second non-movable portion; and a carrier substrate on which an image sensing component is disposed. Connecting the outer frame to the second non-movable portion; connecting at least one flexible element between the lens focusing structure and the second non-movable portion, so that the lens focusing structure becomes the second movable portion, the lens The focusing structure is suspended in the axial direction of the light inside the outer frame; a magnet assembly includes at least one x-axis magnet and at least one y-axis magnet; and a coil assembly including at least one x-axis coil and at least one y-axis a coil and corresponding to the magnet assembly without contacting; wherein the coil assembly and the magnet assembly are connected to the second movable portion, and the other is connected to the two non-movable portions, and corresponding to each other In order to join the shock absorbing material. The resonance suppression method according to claim 10, wherein the flexible element is a plurality of suspension wires. The resonance suppression method according to claim 10, wherein the flexible member is a spring piece. The method for suppressing resonance according to claim 1, wherein the anti-shock structure comprises at least: an outer frame as the second non-movable portion, the outer frame connecting the lens focusing structure; and a carrier substrate; An image sensing component is disposed as the second movable portion; at least one flexible component is connected between the second movable portion and the second immovable portion for suspending the carrier substrate The lens is disposed in the axial direction of the light below the focusing structure; a magnet assembly includes at least one x-axis magnet and at least one y-axis magnet; and a coil assembly including at least one x-axis coil and at least one y-axis coil, and The magnet assemblies correspond to each other without contact; wherein the coil assembly and the magnet assembly are connected to one of the The second movable portion is connected to the two non-movable portions and is corresponding to each other for adding the shock absorbing material. The resonance suppression method according to claim 13, wherein the flexible element is a plurality of suspension wires. The resonance suppression method according to claim 13, wherein the flexible member is a spring piece. The resonance suppression method according to claim 1, wherein the first movable portion is connected to the second movable portion, and only the shock absorbing material is required to be added between the second movable portion and the second movable portion. The shock absorbing material between the first movable portion and the first immovable portion is omitted. An anti-shake lens focusing module for suppressing resonance, the module at least comprising: a lens focusing structure having a first movable portion and a first non-movable portion, wherein the first movable portion carries a lens extending The light ray is axially focused, wherein the first movable portion is a lens carrier or a coil, the first non-movable portion is a frame or a plurality of magnetic components, and the anti-shock structure has a second movable portion therein. And a second movable portion, wherein the second movable portion can perform a shadow correction operation; and at least one shock absorbing material is added between the first movable portion and the first movable portion, and is added to the second movable portion Between the portion and the second immovable portion, absorbing the chattering caused by the focusing operation of the first movable portion, and absorbing the chattering caused by the image correcting action of the second movable portion to suppress The first movable portion and the second movable portion may resonate due to the operation. The anti-shake lens focusing module according to claim 17, wherein the shock absorbing material is a soft gel, a soft spring, a soft rubber or a shock absorbing tape. The anti-shake lens focusing module of claim 17, wherein the lens focusing structure comprises: the lens carrier as the first movable portion, the lens can be mounted at the center, and the lens is wrapped around the lens a coil; and the frame is configured as the first non-movable portion, and the lens holder is accommodated in a center, and the magnetic element is embedded in a side edge of the frame, corresponding to the outer side of the coil, and does not contact the coil. The anti-shake lens focusing module of claim 19, wherein a side wall of the frame and the lens carrier are used to join the shock absorbing material. The anti-shake lens focusing module of claim 19, wherein an accommodating notch is further formed on a side edge of the frame for adding the shock absorbing material. The anti-shake lens focusing module of claim 17, wherein the anti-shock structure comprises: an outer frame as the second non-movable portion, the outer frame is connected with the lens focusing structure; a carrier substrate on which an image sensing component is disposed to connect the outer frame to the second non-movable portion; a lens frame on which a corrective lens is disposed as the second a movable portion; at least one flexible member connected between the second movable portion and the second non-movable portion for suspending the correcting lens in the axial direction of the light; a magnet assembly comprising at least one An x-axis magnet and at least one y-axis magnet; and a coil assembly including at least one x-axis coil and at least one y-axis coil, and corresponding to the magnet assembly without contact; wherein the coil assembly and the magnet assembly, wherein the coil assembly One of the two is connected to the second movable portion, and the other is connected to the two non-movable portions, and is corresponding to each other for adding the shock absorbing material. The anti-shake lens focusing module of claim 22, wherein the flexible component suspends the correcting lens between the lens focusing structure and the image sensing element. The anti-shake lens focusing module of claim 22, wherein the flexible component is a plurality of suspension wires. The anti-shake lens focusing module of claim 22, wherein the flexible component is a shrapnel. The anti-shake lens focusing module of claim 17, wherein the anti-shock structure comprises at least: an outer frame serving as the second non-movable portion; and a carrier substrate having an image sense thereon The measuring component is connected to the outer frame to become the second immovable portion; At least one flexible component is connected between the lens focusing structure and the second non-movable portion, so that the lens focusing structure becomes the second movable portion, and the lens focusing structure is suspended from the optical axis inside the outer frame Upward; a magnet assembly comprising at least one x-axis magnet and at least one y-axis magnet; and a coil assembly comprising at least one x-axis coil and at least one y-axis coil, and corresponding to the magnet assembly without contact; Wherein the coil assembly and the magnet assembly are connected to the second movable portion, and the other is connected to the two non-movable portions and corresponding to each other for adding the shock absorbing material. The anti-shake lens focusing module of claim 26, wherein the flexible component is a plurality of suspension wires. The anti-shake lens focusing module of claim 26, wherein the flexible component is a shrapnel. The anti-shake lens focusing module of claim 17, wherein the anti-shock structure comprises at least: an outer frame as the second non-movable portion, the outer frame connecting the lens focusing structure; The carrier substrate is provided with an image sensing component as the second movable portion; at least one flexible component is connected between the second movable portion and the second immovable portion for the carrier The substrate is suspended from the lens focus junction The light beam is disposed axially; a magnet assembly includes at least one x-axis magnet and at least one y-axis magnet; and a coil assembly including at least one x-axis coil and at least one y-axis coil, and the magnet assembly Corresponding to each other without contact; wherein the coil assembly and the magnet assembly are connected to the second movable portion, and the other is connected to the two non-movable portions, and corresponding to each other for adding the shock absorption material. The anti-shake lens focusing module of claim 29, wherein the flexible component is a plurality of suspension wires. The anti-shake lens focusing module of claim 29, wherein the flexible component is a shrapnel. The anti-shake lens focusing module of claim 29, wherein the first movable portion is connected to the second movable portion, and only needs to be added between the second movable portion and the second movable portion. The shock absorbing material is omitted, and the shock absorbing material between the first movable portion and the first immovable portion is omitted.