Optical image stabilization camera module and optical image stabilization method

Abstract

The present invention provides an optical image stabilization camera module and an optical image stabilization method, wherein the optical image stabilization camera module comprises a camera module, wherein the camera module comprises at least an image sensor and a lens assembly; a bearing component for bearing the camera module; and a driving component for driving the bearing component to drive the camera module to rotate around an axis parallel to the plane of the image sensor. The optical image stabilization camera module and the optical image stabilization method of the present invention provide an anti-shake compensation capability by driving the camera module to perform a tilting motion around an optical axis, and can achieve a larger anti-shake compensation range than a conventional lens translation type in terms of structure.

Description

Technical Field

[0001] The present invention relates to the technical field of camera modules, and in particular to an optical image stabilization camera module and an optical image stabilization method. Background Art

[0002] With the rapid development of the smartphone industry, people's requirements for mobile phone camera imaging effects are gradually increasing. Compared with traditional camera systems, cell phone camera modules (CCM) are widely used in various new generation portable camera devices due to their advantages such as miniaturization, low power consumption, low cost and high image quality.

[0003] Currently, the structure of CCM includes a lens unit, IR (infrared filter), image sensor, flexible circuit board or printed circuit board, and a connector connected to the mobile phone motherboard.

[0004] Ordinary autofocus camera modules use a focus motor to drive the lens to move up and down in the direction of the optical axis, thereby achieving the autofocus function. When taking photos or videos, the phone cannot remain absolutely stable due to human shaking or other reasons, which causes a certain deviation in the optical path. At this time, the focus and light input of the lens will be affected, which in turn affects the quality of the image acquired by the camera module. Generally, this optical path deflection occurs in the direction perpendicular to the optical axis, and the autofocus motor can only drive the lens to move along the optical axis, so it cannot solve the problems caused by this type of optical path deflection. Adding an optical image stabilization actuator to the autofocus motor to drive the lens to move in two directions perpendicular to the optical axis or to drive the lens to tilt around the optical axis can compensate for the above-mentioned deflection of the lens and help the camera obtain better image quality. This type of camera module is called an optical image stabilization camera module.

[0005] Most of the existing mature optical image stabilization solutions for camera modules are built into the focus motor, which translates or tilts the lens to compensate for the jitter caused by hand shake or other reasons. This compensation method is limited by the size of the focus motor and the weight of the optical lens, and cannot form large-stroke / large-compensation-angle image stabilization compensation. Among them, the lens translation solution is better than the lens tilt solution. The lens tilt solution will cause the image stabilization to fail when the lens is too large and heavy. At the same time, due to the problem of the optical path, the lens tilt solution will cause the four corners to become dark or blurred after compensation, affecting the customer experience.

[0006] Moreover, since there is no drive motor in the fixed-focus camera module, the optical image stabilization function cannot be achieved using the existing lens translation or tilt optical image stabilization solutions.

[0007] Therefore, it is of great significance to the field to provide an optical image stabilization solution that can achieve a large stroke, a large compensation angle, and wider versatility. Summary of the invention

[0008] The object of the present invention is to provide an optical image stabilization camera module and an optical image stabilization method for realizing optical image stabilization with a large stroke and a large compensation angle.

[0009] Based on the above considerations, the present invention provides an optical image stabilization camera module, comprising:

[0010] A camera module, the camera module comprising at least an image sensor and a lens assembly;

[0011] A bearing component, used for bearing the camera module;

[0012] The driving component is used to drive the bearing component to drive the camera module to rotate around an axis parallel to the plane of the image sensor.

[0013] Optionally, the supporting component includes a base plate and an adjustment plate arranged on the base plate, the base plate is used to provide a fulcrum for the adjustment plate, the adjustment plate supports the camera module, and drives the camera module to rotate relative to the base plate based on an axis parallel to the image sensor plane.

[0014] Optionally, the adjustment plate includes one or more.

[0015] Optionally, the axes parallel to the image sensor plane include at least two axes, and the axes parallel to the image sensor plane are located on the same adjustment plate or different adjustment plates.

[0016] Optionally, the axes parallel to the plane of the image sensor include at least two and are located on the same adjustment plate, and the intersection of at least two axes is located on the optical axis of the image sensor.

[0017] Optionally, the axes parallel to the image sensor plane include at least two axes located on different adjustment plates, and the projections of the axes located on different adjustment plates on the image sensor plane intersect, and the intersection point is located on the optical axis of the image sensor.

[0018] Optionally, the type of the driving component includes a piezoelectric driver, a memory alloy driver, or an electromagnetic coil driver.

[0019] Optionally, at least one driver is provided corresponding to each axis parallel to the image sensor plane.

[0020] Optionally, a protective shell is disposed outside the optical image stabilization structure.

[0021] Optionally, a limiting structure for limiting the position of the camera module is arranged inside the protective shell.

[0022] The present invention also provides an optical image stabilization method for a camera module, comprising the following steps:

[0023] Providing a camera module, the camera module at least comprising an image sensor and a lens assembly;

[0024] Using a carrying component to carry the camera module;

[0025] A driving component is used to drive the bearing component, and the bearing component drives the camera module to rotate around an axis parallel to the plane of the image sensor.

[0026] Optionally, the supporting component includes a base plate and an adjustment plate arranged on the base plate, the base plate is used to provide a fulcrum for the adjustment plate, the adjustment plate supports the camera module, and drives the camera module to rotate relative to the base plate based on an axis parallel to the image sensor plane.

[0027] Optionally, the adjustment plate includes one or more.

[0028] Optionally, the axes parallel to the image sensor plane include at least two axes, and the axes parallel to the image sensor plane are located on the same adjustment plate or different adjustment plates.

[0029] Optionally, the axes parallel to the plane of the image sensor include at least two and are located on the same adjustment plate, and the intersection of at least two axes is located on the optical axis of the image sensor.

[0030] Optionally, the axes parallel to the image sensor plane include at least two axes located on different adjustment plates, and the projections of the axes located on different adjustment plates on the image sensor plane intersect, and the intersection point is located on the optical axis of the image sensor.

[0031] Optionally, the type of the driving component includes a piezoelectric driver, a memory alloy driver, or an electromagnetic coil driver.

[0032] Optionally, at least one driver is provided corresponding to each axis parallel to the image sensor plane.

[0033] Optionally, a protective shell is disposed outside the optical image stabilization structure.

[0034] Optionally, a limiting structure for limiting the position of the camera module is arranged inside the protective shell.

[0035] The optical image stabilization camera module and the optical image stabilization method of the present invention can improve the anti-shake compensation range by making the camera module perform tilting movement around the optical axis, avoid image quality problems caused by optical path deflection due to hand shaking during shooting, and thus achieve the purpose of optical image stabilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0037] Figure 1 Shown is a schematic diagram of the structure of the optical image stabilization camera module provided in Example 1;

[0038] Figure 2 Shown is a schematic structural diagram of a bearing component and a driving component provided in the first embodiment;

[0039] Figure 3 Shown is a schematic structural diagram of an optical image stabilization camera module provided by another embodiment;

[0040] Figure 4 A schematic diagram showing the structure of a bearing component and a driving component provided in another embodiment;

[0041] Figure 5 Shown is a schematic diagram of the structure of an optical image stabilization camera module provided in Example 2;

[0042] Figure 6 The diagram shows the structure of the bearing component and the driving component provided in the second embodiment;

[0043] Figure 7 A schematic diagram showing the structure of a bearing component and a driving component provided in another embodiment;

[0044] Figure 8 Shown is a schematic diagram of the structure of the optical image stabilization camera module provided in Example 3.

[0045] In the drawings, the same or similar reference numerals denote the same or similar devices (modules) or steps throughout different drawings. DETAILED DESCRIPTION

[0046] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited to the specific implementation disclosed below.

[0047] Secondly, the present invention is described in detail using schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the schematic diagrams are only examples and should not limit the scope of protection of the present invention.

[0048] The present invention provides an optical image stabilization camera module, the optical image stabilization camera module comprising:

[0049] A camera module, the camera module comprising at least an image sensor and a lens assembly;

[0050] A bearing component, used for bearing the camera module;

[0051] The driving component is used to drive the bearing component to drive the camera module to rotate around an axis parallel to the plane of the image sensor to achieve optical image stabilization compensation.

[0052] The present invention also provides an optical image stabilization method for a camera module, comprising the following steps:

[0053] Providing a camera module, the camera module at least comprising an image sensor and a lens assembly;

[0054] Using a carrying component to carry the camera module;

[0055] A driving component is used to drive the bearing component, and the bearing component drives the camera module to rotate around an axis parallel to the plane of the image sensor.

[0056] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the optical image stabilization camera module and the optical image stabilization method of the present invention are described in detail below with reference to the accompanying drawings. Embodiment 1

[0057] This embodiment provides an optical image stabilization camera module, such as Figure 1 As shown, including:

[0058] The camera module 11 includes at least an image sensor and a lens assembly;

[0059] A bearing component, used for bearing the camera module;

[0060] The driving component 13 is used to drive the bearing component and drive the camera module 11 to rotate around an axis parallel to the image sensor plane.

[0061] The bearing component is configured as a bottom plate and an adjustment plate located on the bottom plate, the bottom plate is used to provide a fulcrum for the adjustment plate, the adjustment plate carries the camera module, and drives the camera module to rotate relative to the bottom plate based on an axis parallel to the image sensor plane. Figure 1 and 2 As shown, the bearing component includes a bottom plate 122 and an adjustment plate 121 disposed on the bottom plate. The adjustment plate 121 carries the camera module 11. A support shaft 123 is disposed at the center of the bottom plate 122 to provide a fulcrum for the adjustment plate 121. The bottom plate 122 is also provided with a clamping claw 124 to fix the memory alloy driver and form an electrical connection with the driver. In another embodiment, as Figure 3 and Figure 4As shown, the adjustment plate is provided as a first adjustment plate 1211' and a second adjustment plate 1212', the first adjustment plate 1211' carries the camera module 11', the first adjustment plate 1211' is symmetrically provided with grooves for respectively fixing the memory alloy drivers 131' and 133', the second adjustment plate is provided with a support shaft 1231' for supporting the first adjustment plate 1211', the memory alloy drivers 131' and 133' drive the first adjustment plate 1211' to drive the camera module to rotate around the first axis based on the second adjustment plate 1212'. The second adjustment plate 1212' is symmetrically provided with grooves for respectively fixing the memory alloy drivers 132' and 134', the bottom plate 122' is provided with a support shaft 1232', and is also provided with a clamping claw 124' for fixing the memory alloy driver and forming an electrical connection therewith, the memory alloy drivers 132' and 134' drive the second adjustment plate 1212' to drive the camera module to rotate around the second axis based on the bottom plate. In other embodiments, the adjustment plate may be provided as one or more, and may also be provided in a strip shape or other shapes, as long as it satisfies the bearing function and can drive the camera module to rotate based on the base plate.

[0062] Preferably, the axis parallel to the image sensor plane, i.e., the rotation axis, can be set to two or more as needed, the multiple rotation axes are not completely parallel, and the multiple rotation axes are located on different adjustment plates or on unequal adjustment plates, wherein the projections of at least two rotation axes on the image sensor plane intersect and the intersection point is located on the optical axis of the image sensor. In this embodiment, Figure 1 As shown, the rotation axis includes a first axis and a second axis that are perpendicular to each other, and the intersection of the first axis and the second axis corresponds to the optical axis of the image sensor.

[0063] The types of the driving components include piezoelectric drivers, memory alloy drivers, or electromagnetic coil drivers. The drivers can be arranged according to the rotation axis, and one or more drivers can be arranged corresponding to one rotation axis. Figure 2 As shown, a memory alloy driver is selected as the driving component 13. According to the first axis and the second axis set in this embodiment, the memory alloy driver of this embodiment includes a first driver 131 and a third driver 133 for driving the camera module to rotate around the first axis, and a second driver 132 and a fourth driver 134 for driving the camera module to rotate around the second axis. The first driver 131 and the third driver 133 are symmetrically arranged relative to the first axis, and the second driver 132 and the fourth driver 134 are symmetrically arranged relative to the second axis.

[0064] A protective shell is generally provided around the camera module, such as Figure 1 The protective shell 14 is used to protect the camera module 11. A limiting structure (not shown) for limiting the position of the camera module 11 may also be provided inside the protective shell 14.

[0065] A return component (not shown) may also be provided between the bottom plate and the camera module, preferably an elastic flexure, for returning the camera module to its original position when the camera module stops working.

[0066] This embodiment also provides an optical image stabilization method for a camera module, referring to Figure 1 and Figure 2 As shown, the following steps are included:

[0067] A camera module 11 is provided, wherein the camera module includes an image sensor and a lens assembly;

[0068] A carrying component is used to carry the camera module 11;

[0069] The driving component 13 is used to drive the bearing component to drive the camera module 11 to rotate around an axis parallel to the image sensor plane.

[0070] The types of driving components include piezoelectric drivers, memory alloy drivers, or electromagnetic coil drivers. In this embodiment, the memory alloy driver 13 is selected.

[0071] The bearing component includes a bottom plate and an adjustment plate disposed on the bottom plate, wherein the bottom plate is used to provide a fulcrum for the adjustment plate, and the adjustment plate carries the camera module and drives the camera module to rotate relative to the bottom plate. The adjustment plate may include one or more.

[0072] The axis parallel to the image sensor plane, i.e., the rotation axis, can be set to two or more as needed, the multiple rotation axes are not completely parallel, and the multiple rotation axes are located on different adjustment plates or on unequal adjustment plates, wherein at least two of the rotation axes have an intersection in their projections on the image sensor plane, and the intersection is located on the optical axis of the image sensor. The types of the driving components include piezoelectric drivers, memory alloy drivers, or electromagnetic coil drivers. At least one driver is set corresponding to each axis parallel to the image sensor plane.

[0073] A protective shell is disposed outside the optical anti-shake structure, and a limiting structure for limiting the position of the camera module is disposed inside the protective shell.

[0074] In this embodiment, a driving component is provided to drive the camera module to rotate around an axis parallel to the plane of the image sensor, thereby achieving optical image stabilization compensation. Embodiment 2

[0075] This embodiment provides an optical anti-shake structure. The technical solution provided by this embodiment is similar to that of the first embodiment. The difference from the first embodiment is that the driving component in this embodiment is a piezoelectric driver.

[0076] like Figure 5 and 6 As shown, this embodiment provides an optical image stabilization camera module, including: a camera module 21, including at least an image sensor and a lens assembly;

[0077] A bearing component, used for bearing the camera module 21;

[0078] The driving component 23 is used to drive the bearing component and drive the camera module 21 to rotate around an axis parallel to the plane of the image sensor.

[0079] In this embodiment, the driving component 23 is a piezoelectric driver, such as Figure 5 and 6 As shown, this embodiment uses four piezoelectric drivers, which are fixed on the bottom plate 222 and are symmetrically arranged relative to the first axis and the second axis.

[0080] In this embodiment, the bearing component includes a bottom plate 222 and four adjustment plates 221 disposed on the bottom plate. The four adjustment plates 221 jointly bear the camera module 21. Four support shafts 223 are disposed at the center of the bottom plate 222, corresponding to the four adjustment plates one by one, and providing fulcrums for the four adjustment plates respectively. The four piezoelectric drivers respectively drive the four adjustment plates to drive the camera module to rotate.

[0081] In another embodiment, if Figure 7 As shown, two adjustment plates 221' are provided, and two piezoelectric drivers 23' are also provided accordingly. When the piezoelectric driver is powered on, it can generate both positive deformation and negative deformation, and can drive the camera module to rotate around the first axis and the second axis. In other embodiments, the adjustment plate can also be set as a flat plate, or can be set in a strip or other shape, as long as it meets the bearing function and can drive the camera module to rotate.

[0082] It should be noted that the piezoelectric driver will restore its original shape after power failure, so no reset component is required. Other technical solutions are the same as those in the first embodiment and will not be described in detail here. Embodiment 3

[0083] This embodiment provides an optical anti-shake structure. The technical solution provided by this embodiment is similar to that of the first embodiment. The difference from the first embodiment is that the driving component in this embodiment is an electromagnetic driver.

[0084] like Figure 8 As shown, this embodiment provides an optical image stabilization camera module, including:

[0085] The camera module 31 at least includes an image sensor and a lens assembly;

[0086] A bearing component, used for bearing the camera module 31;

[0087] The driving component is used to drive the bearing component and drive the camera module 31 to rotate around an axis parallel to the plane of the image sensor.

[0088] In this embodiment, the driving component is an electromagnetic driver, which includes a magnet 331 and a driving coil 332 corresponding to the magnet. Figure 8 As shown, this embodiment uses four electromagnetic drivers, which are symmetrically arranged relative to the first axis and the second axis.

[0089] In this embodiment, the bearing component includes a bottom plate 322 and an adjustment plate 321 disposed on the bottom plate. A support shaft 323 is disposed at the center of the bottom plate 322 to provide a fulcrum for the adjustment plate 321 .

[0090] In other embodiments, the adjustment plate can also be configured to be strip-shaped or in other shapes, as long as it can satisfy the bearing function and drive the camera module to rotate. Other technical solutions are the same as those in the first embodiment and will not be described in detail here.

[0091] In summary, the present invention provides an optical image stabilization camera module and an optical image stabilization method, wherein the optical image stabilization camera module includes a camera module, wherein the camera module includes at least an image sensor and a lens assembly; a bearing component for bearing the camera module; and a driving component for driving the bearing component to drive the camera module to rotate around an axis parallel to the plane of the image sensor to achieve optical image stabilization compensation. The optical image stabilization camera module and the optical image stabilization method of the present invention increase the range of image stabilization compensation by driving the camera module to tilt around the optical axis, thereby avoiding image quality problems caused by the shaking of the mobile phone during shooting, thereby achieving the purpose of optical image stabilization.

[0092] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, in any case, the embodiments should be considered exemplary and non-restrictive. Furthermore, it is apparent that the term "comprising" does not exclude other elements and steps, and the wording "a" does not exclude the plural. Multiple elements stated in a device claim may also be implemented by one element. The words first, second, etc. are used to indicate names and do not indicate any particular order.

Claims

1. An optical image stabilization camera module, characterized in that: include: A camera module, the camera module comprising at least an image sensor and a lens assembly; A bearing component, used for bearing the camera module; A driving component, used for driving the bearing component to drive the camera module to rotate around an axis parallel to the plane of the image sensor; The bearing component includes a bottom plate and an adjustment plate arranged on the bottom plate, wherein the bottom plate is used to provide a fulcrum for the adjustment plate, and the adjustment plate carries the camera module and drives the camera module to rotate relative to the bottom plate based on an axis parallel to the image sensor plane; The axes parallel to the image sensor plane include at least two axes located on different adjustment plates, and the projections of the axes located on different adjustment plates on the image sensor plane intersect, and the intersection point is located on the optical axis of the image sensor.

2. The optical image stabilization camera module according to claim 1, wherein: The types of the driving components include a piezoelectric driver, a memory alloy driver, or an electromagnetic coil driver.

3. The optical image stabilization camera module according to claim 2, wherein: At least one driver is correspondingly arranged for each axis parallel to the image sensor plane.

4. The optical image stabilization camera module according to claim 1, wherein: A protective shell is arranged outside the optical anti-shake structure.

5. The optical image stabilization camera module according to claim 4, wherein: A limiting structure for limiting the position of the camera module is arranged inside the protective shell.

6. An optical image stabilization method for a camera module, characterized in that: The steps include: Providing a camera module, the camera module at least comprising an image sensor and a lens assembly; Using a carrying component to carry the camera module; The bearing component is driven by a driving component, and the bearing component drives the camera module to rotate around an axis parallel to the plane of the image sensor; The bearing component includes a bottom plate and an adjustment plate arranged on the bottom plate, wherein the bottom plate is used to provide a fulcrum for the adjustment plate, and the adjustment plate carries the camera module and drives the camera module to rotate relative to the bottom plate based on an axis parallel to the image sensor plane; The axes parallel to the image sensor plane include at least two axes located on different adjustment plates, and the projections of the axes located on different adjustment plates on the image sensor plane intersect, and the intersection point is located on the optical axis of the image sensor.

7. The optical image stabilization method of the camera module according to claim 6, characterized in that: The types of the driving components include a piezoelectric driver, a memory alloy driver, or an electromagnetic coil driver.

8. The optical image stabilization method of the camera module according to claim 7, characterized in that: At least one driver is correspondingly arranged for each axis parallel to the image sensor plane.

9. The optical image stabilization method of a camera module as claimed in claim 6, characterized in that: A protective shell is arranged outside the optical anti-shake structure.

10. The optical image stabilization method of the camera module according to claim 9, characterized in that: A limiting structure for limiting the position of the camera module is arranged inside the protective shell.

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