The present disclosure relates to an image stabilization lens module, a camera module and an electronic device, more particularly to an image stabilization lens module, a camera module applicable to an electronic device.
With the development of semiconductor manufacturing technology, the performance of image sensors has been improved, and the pixel size thereof has been scaled down. Therefore, featuring high image quality becomes one of the indispensable features of an optical system nowadays. Furthermore, due to the rapid changes in technology, electronic devices equipped with optical systems are trending towards multi-functionality for various applications, and therefore the functionality requirements for the optical systems have been increasing.
In recent years, there is an increasing demand for electronic devices featuring compact size, but conventional optical systems, especially the telephoto optical systems with a long focal length, are difficult to meet both the requirements of high image quality and compactness. Conventional telephoto optical systems usually have shortcomings of overly long total length, poor image quality or overly large size, which is unable to meet the requirements of the current technology trends. To achieve compactness, the optical systems may be configured to have a folded optical axis so as to reduce the dimension of the optical systems in a specific direction, thereby reducing the total system size. Moreover, the optical systems can be configured with anti-vibration function for achieving high image quality. However, to meet the abovementioned requirements, a driving unit of complex structure is required to drive an optical axis folding element, which results in more complex structure and more weight of the optical systems.
Accordingly, how to improve the optical systems for simplifying the structure of the lens assembly, achieving a compact size and maintaining high image quality so as to meet the requirement of high-end-specification electronic devices is an important topic in this field nowadays.
According to one aspect of the present disclosure, an image stabilization lens module includes an optical lens assembly, a lens holder, a light-folding element, a movable carrier, a fixed base, a plastic swing element and a driving mechanism. The optical lens assembly includes a plurality of optical lens elements, and an optical axis passes through the optical lens elements. The lens holder holds the optical lens elements of the optical lens assembly. The light-folding element is located on the optical axis and folds the optical axis. The movable carrier carries the light-folding element. The fixed base is connected to the movable carrier via an elastic element. The plastic swing element is disposed between the movable carrier and the fixed base. The plastic swing element includes a main body, a carrier support structure, a base support structure, a carrier auxiliary structure and a base auxiliary structure. The main body has a carrier corresponsive surface facing the movable carrier and a base corresponsive surface facing the fixed base. The carrier support structure is disposed on the carrier corresponsive surface, and the carrier support structure supports and is connected to the movable carrier. The base support structure is disposed on the base corresponsive surface, and the base support structure is connected to the fixed base, so that the fixed base supports the plastic swing element. The carrier auxiliary structure is disposed on the base corresponsive surface, and the carrier auxiliary structure is disposed opposite to the carrier support structure. The base auxiliary structure is disposed on the carrier corresponsive surface, and the base auxiliary structure is disposed opposite to the base support structure. The driving mechanism is configured to drive the movable carrier to rotate relative to the fixed base. In addition, the light-folding element is located on an object side of the lens holder. The carrier support structure is in physical contact with the movable carrier, and the base support structure is in physical contact with the fixed base. The carrier auxiliary structure, the base auxiliary structure and the main body of the plastic swing element are formed in one piece.
According to another aspect of the present disclosure, an image stabilization lens module includes an optical lens assembly, a lens holder, a light-folding element, a movable carrier, a fixed base, a swing element and a driving mechanism. The optical lens assembly includes a plurality of optical lens elements, and an optical axis passes through the optical lens elements. The lens holder holds the optical lens elements of the optical lens assembly. The light-folding element is located on the optical axis and folds the optical axis. The movable carrier carriers the light-folding element. The fixed base is connected to the movable carrier via an elastic element. The swing element is disposed between the movable carrier and the fixed base. The swing element includes a main body, a carrier support structure, a base support structure, a carrier auxiliary structure and a base auxiliary structure. The main body has a carrier corresponsive surface facing the movable carrier and a base corresponsive surface facing the fixed base. The carrier support structure is disposed on the carrier corresponsive surface, and the carrier support structure supports and is connected to the movable carrier. The base support structure is disposed on the base corresponsive surface, and the base support structure is connected to the fixed base, so that the fixed base supports the swing element. The carrier auxiliary structure is disposed on the base corresponsive surface, and the carrier auxiliary structure is disposed opposite to the carrier support structure. The base auxiliary structure is disposed on the carrier corresponsive surface, and the base auxiliary structure is disposed opposite to the base support structure. The driving mechanism is configured to drive the movable carrier to rotate relative to the fixed base. In addition, the light-folding element is located on an image side of the lens holder. The carrier support structure is in physical contact with the movable carrier, and the base support structure is in physical contact with the fixed base. The carrier auxiliary structure, the base auxiliary structure and the main body of the swing element are formed in one piece.
According to another aspect of the present disclosure, an image stabilization lens module includes an optical lens assembly, a lens holder, a light-folding element, a movable carrier, a fixed base, a swing element, a first driving mechanism, a second driving mechanism and a flexible printed circuit board. The optical lens assembly includes a plurality of optical lens elements, and an optical axis passes through the optical lens elements. The lens holder holds the optical lens elements of the optical lens assembly. The light-folding element is located on the optical axis and folds the optical axis. The movable carrier carries the light-folding element. The fixed base is connected to the movable carrier via an elastic element. The swing element is disposed between the movable carrier and the fixed base. The first driving mechanism is configured to drive the movable carrier to rotate relative to the fixed base in a first rotation direction or in a direction opposite to the first rotation direction, and the first driving mechanism includes a first coil and a first magnet disposed corresponding to each other. The second driving mechanism is configured to drive the movable carrier to rotate relative to the fixed base in a second rotation direction or in a direction opposite to the second rotation direction, and the second driving mechanism includes a second coil and a second magnet disposed corresponding to each other. The flexible printed circuit board is attached to the fixed base. In addition, the light-folding element is located on an image side of the lens holder. The swing element is in physical contact with the movable carrier, and the swing element is in physical contact with the fixed base. The first coil and the second coil are disposed on the flexible printed circuit board, and the first magnet and the second magnet are disposed on the movable carrier.
According to another aspect of the present disclosure, a camera module includes an image sensor and one of the aforementioned image stabilization lens modules. The image sensor is disposed on an image surface of the image stabilization lens module.
According to another aspect of the present disclosure, an electronic device includes the aforementioned camera module.
The disclosure can be better understood by reading the following detailed description of the embodiments, with reference made to the accompanying drawings as follows:
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.
The present disclosure provides an image stabilization lens module. The image stabilization lens module includes an optical lens assembly, a lens holder, at least one light-folding element, a movable carrier, a fixed base, a swing element and at least one driving mechanism.
The optical lens assembly includes a plurality of optical lens elements, and an optical axis passes through the optical lens elements. Moreover, the lens holder holds the optical lens elements of the optical lens assembly.
The light-folding element can be located on an object side or an image side of the lens holder, and the light-folding element folds the optical axis. For example, in one configuration where the light-folding element is disposed on the object side of the lens holder, the light-folding element is configured to redirect an incident light traveling along the optical axis towards the lens holder, so that the light passes through the optical lens elements of the optical lens assembly. In one configuration where the light-folding element is disposed on the image side of the lens holder, the light-folding element is configured to redirect the light coming from the optical lens assembly. In addition, in one configuration where the number of light-folding element is plural, one of the light-folding elements can be disposed on the object side of the lens holder, and another of the light-folding elements can be disposed on the image side of the lens holder, so that light changes its traveling direction multiple times in the image stabilization lens module so as to be applicable to various optical systems of different requirements. Moreover, the light-folding element can be, for example, a mirror having a reflection surface or a prism having a reflection surface, but the present disclosure is not limited thereto. Furthermore, in some configurations, the light-folding element can have several reflection surfaces, so that light changes its traveling direction multiple times in the image stabilization lens module. In some configurations, the light-folding element can include a plurality of prisms that are cemented or assembled together, but the present disclosure is not limited thereto.
The movable carrier carries the light-folding element, and the movable carrier is configured to bring the light-folding element to rotate together.
The fixed base is connected to the movable carrier via an elastic element. The elastic element provides a preload force so that the movable carrier can be rotatably and more stably disposed on the fixed base. For example, the elastic element exerts a preload force on the movable carrier in a direction towards the fixed base. Therefore, the movable carrier can remain stable when the movable carrier is not driven to move.
The swing element is disposed between the movable carrier and the fixed base, the swing element is in physical contact with the movable carrier, and the swing element is in physical contact with the fixed base. Therefore, the swing element provides the movable carrier with a degree of freedom of rotation relative to the fixed base. Moreover, the degree of freedom of rotation can be a rotation direction, such as pitching or yawing, but the present disclosure is not limited thereto. In some configurations, the swing element can be made of plastic material as a plastic swing element, but the present disclosure is not limited thereto.
The driving mechanism is configured to drive the movable carrier to rotate in at least one direction relative to the fixed base, so that the light-folding element disposed on the movable carrier can be rotated together relative to the fixed base.
According to the present disclosure, the driving mechanism can drive the movable carrier and the light-folding element disposed on the movable carrier to rotate relative to the fixed base so as to change the direction of the optical axis, thereby achieving image stabilization.
The swing element can include a main body, a carrier support structure, a base support structure, a carrier auxiliary structure and a base auxiliary structure. The main body has a carrier corresponsive surface facing the movable carrier and a base corresponsive surface facing the fixed base. The carrier support structure is disposed on the carrier corresponsive surface, and the carrier support structure supports and is connected to the movable carrier. The carrier support structure is in physical contact with the movable carrier. The base support structure is disposed on the base corresponsive surface, and the base support structure is connected to the fixed base, so that the fixed base supports the swing element, and the base support structure is in physical contact with the fixed base. The carrier auxiliary structure is disposed on the base corresponsive surface, and the carrier auxiliary structure is disposed opposite to the carrier support structure. The base auxiliary structure is disposed on the carrier corresponsive surface, and the base auxiliary structure is disposed opposite to the base support structure. In addition, the carrier auxiliary structure, the base auxiliary structure and the main body are formed in one piece. Furthermore, the carrier auxiliary structure, the base auxiliary structure and the main body of the swing element can be one-piece formed by, for example, injection molding, metal stamping process or sheet metal bending, but the present disclosure is not limited thereto.
The image stabilization lens module can further include a flexible printed circuit board attached to the fixed base. Therefore, the flexible printed circuit board is bendable, which is favorable for reducing the size of the image stabilization lens module.
The driving mechanism can include at least one coil and at least one magnet disposed corresponding to each other. One of the coil and the magnet is disposed on the movable carrier, and the other of the coil and the magnet is directly or indirectly disposed on the fixed base. Therefore, a proper number of the coil and the magnet is favorable for optimizing the driving efficiency of the driving mechanism. In one configuration, the magnet can be disposed on the movable carrier, and the coil can be disposed on the flexible printed circuit board attached to the fixed base, such that the coil is indirectly disposed on the fixed base. Therefore, it is favorable for providing a circuit design of better space utilization efficiency.
The driving mechanism is configured to drive the movable carrier to rotate relative to the fixed base in a first rotation direction and to rotate relative to the fixed base in a direction opposite to the first rotation direction, and drive the movable carrier to rotate relative to the fixed base in a second rotation direction and to rotate relative to the fixed base in a direction opposite to the second rotation direction. In one configuration, the driving mechanism can include a first driving mechanism and a second driving mechanism. The first driving mechanism is configured to drive the movable carrier to rotate relative to the fixed base in the first rotation direction or in the direction opposite to the first rotation direction, the second driving mechanism is configured to drive the movable carrier to rotate relative to the fixed base in the second rotation direction or in the direction opposite to the second rotation direction, and a rotation axis of the first rotation direction is different from a rotation axis of the second rotation direction. The first driving mechanism includes a first coil and a first magnet disposed corresponding to each other, and the second driving mechanism includes a second coil and a second magnet corresponding to each other. Moreover, the first coil and the second coil can be both disposed on the flexible printed circuit board attached to the fixed base, and the first magnet and the second magnet can be both disposed on the movable carrier.
A first block mechanism can be formed between the carrier auxiliary structure and the fixed base. For example, after the swing element is driven (e.g., brought by the movable carrier) to rotate a certain angle in the second rotation direction or in its opposite rotation direction, the carrier auxiliary structure on the base corresponsive surface of the main body of the swing element comes into contact with the fixed base, such that the fixed base blocks the carrier auxiliary structure so as to stop the rotation of the swing element. Therefore, it is favorable for reducing the impact force between the swing element and the fixed base so as to improve module operation quality. Moreover, the first block mechanism can provide a buffer against impact force, reduce impact noise and/or limit the movement range of the swing element, but the present disclosure is not limited thereto.
The carrier auxiliary structure can overlap the carrier support structure in a direction parallel to a part of the optical axis passing through the optical lens elements. Therefore, it is favorable for enhancing the effect of the first block mechanism.
A second block mechanism can be formed between the base auxiliary structure and the movable carrier. For example, after the movable carrier is driven to rotate a certain angle in the first rotation direction or the direction opposite to the first rotation direction, the movable carrier comes into contact with the base auxiliary structure on the carrier corresponsive surface of the main body of the swing element, such that the base auxiliary structure blocks the movable carrier so as to stop the rotation of the movable carrier. Therefore, it is favorable for reducing the impact force between the swing element and the movable carrier so as to improve module operation quality. Moreover, the second block mechanism can provide a buffer against impact force, reduce impact noise and/or limit the movement range of the movable carrier, but the present disclosure is not limited thereto.
The base auxiliary structure can overlap the base support structure in the direction parallel to the part of the optical axis passing through the optical lens elements. Therefore, it is favorable for enhancing the effect of the second block mechanism.
In some configurations, the carrier support structure can consist of at least two balls and at least two conical recesses, the conical recesses are formed on the carrier corresponsive surface, and the balls are respectively in physical contact with the conical recesses. Moreover, each of the conical recesses can consist of multiple flat surfaces that are tangent to the surface of the ball, thus having a conical appearance, but the present disclosure is not limited thereto. Therefore, the flat surfaces of the conical recesses are in physical contact with the balls via contact points, such that the structural stability of the carrier support structure can be improved.
In some configurations, the carrier support structure can consist of at least one cylindrical protrusion or at least one cylindrical recess. Therefore, the cylindrical protrusion or the cylindrical recess one-piece formed with the main body of the swing element is favorable for reducing manufacturing costs. Moreover, the cross-section of the cylindrical protrusion or the cylindrical recess can be in an arc shape and have a particular curvature radius, but the present disclosure is not limited thereto.
The carrier support structure can have a first rotation axis, and the movable carrier is rotatable relative to the fixed base in the first rotation direction and the direction opposite to the first rotation direction around the first rotation axis. Therefore, it is favorable for providing the feasibility of adjusting the optical axis direction along the first rotation direction and its opposite rotation direction so as to obtain clear images. Moreover, the first rotation direction and its opposite rotation direction can be, for example, pitching or yawing, but the present disclosure is not limited thereto. In one configuration where the carrier support structure consists of at least two balls and at least two conical recesses, the first rotation axis can be located in a connection line of contact points between the movable carrier and the balls of the carrier support structure, but the present disclosure is not limited thereto; in other configurations, the first rotation axis can be located, for example, in a connection line of the centers of the balls of the carrier support structure. In one configuration where the carrier support structure consists of at least one cylindrical recess, the first rotation axis can be located in a connection line of contact points between the movable carrier and the cylindrical recess of the carrier support structure, but the present disclosure is not limited thereto; in other configurations, the first rotation axis can be located, for example, in an axis of the cylindrical recess on the carrier support structure.
In some configurations, the base support structure can consist of at least two balls and at least two conical recesses, the conical recesses are formed on the base corresponsive surface, and the balls are respectively in physical contact with the conical recesses. Moreover, each of the conical recesses can consist of multiple flat surfaces that are tangent to the ball to have a conical appearance, but the present disclosure is not limited thereto. Therefore, the balls are in physical contact with the conical recesses via contact points, so the rolling resistance of the balls can be reduced.
In some configurations, the base support structure can consist of at least one cylindrical protrusion or at least one cylindrical recess. Therefore, the cylindrical protrusion or the cylindrical recess one-piece formed with the main body of the swing element is favorable for increasing product design flexibility.
The base support structure can have a second rotation axis, and the movable carrier is rotatable relative to the fixed base in the second rotation direction and the direction opposite to the second rotation direction around the second rotation axis. Therefore, it is favorable for providing the feasibility of adjusting the optical axis direction along the second rotation direction and its opposite rotation direction so as to obtain clear images. Moreover, the second rotation direction and its opposite rotation direction can be, for example, pitching or yawing, but the present disclosure is not limited thereto. In one configuration where the base support structure consists of at least two balls and at least two conical recesses, the second rotation axis can be located in a connection line of contact points between the fixed base and the balls of the base support structure, but the present disclosure is not limited thereto; in other configurations, the second rotation axis can be located, for example, in a connection line of the centers of the balls of the base support structure. In the base support structure consists of at least one cylindrical protrusion, the second rotation axis can be located in a connection line of contact points between the fixed base and the cylindrical protrusion of the base support structure, but the present disclosure is not limited thereto; in other configurations, the second rotation axis can be located, for example, in an axis of the cylindrical protrusion on the base support structure.
The rotation axis of the first rotation direction and the rotation axis of the second rotation direction are different from each other and can be orthogonal to each other; in other words, the first rotation axis and the second rotation axis are different from each other and can be orthogonal to each other. Therefore, by proper rotation axes (or rotation directions) arrangement, the image stabilization function of the image stabilization lens module can be optimized.
When a maximum field of view of the optical lens assembly is FOV, the following condition can be satisfied: 1 degree<FOV<50 degrees. Therefore, a telephoto lens module having a narrow field of view can be defined. Moreover, the following condition can also be satisfied: 1 degree<FOV≤35 degrees.
The plastic swing element can have at least one gate trace. Therefore, it is favorable for providing a high molding precision swing element. In addition, the gate trace can be disposed on desired positions of the swing element according to molding requirements so as to achieve better molding efficiency.
Light in the light-folding element can undergo at least one total internal reflection. Therefore, the effect of the total internal reflection(s) in a single light-folding element can be equivalent to the optical property of multiple light-folding elements capable of folding the optical axis, thereby reducing manufacturing costs. Moreover, by selecting a proper reflective index of the light-folding element with multiple reflection surfaces, imaging light can undergo total internal reflection(s) in the light-folding element. Moreover, when light arrives at the interface from a medium of higher refractive index to another medium of lower refractive index and the incident angle is larger than the critical angle, the light undergoes total internal reflection.
The image stabilization lens module can further include a guiding yoke and a guiding magnet. The guiding yoke is disposed on the movable carrier, the guiding magnet is disposed on the fixed base, and the guiding yoke and the guiding magnet are disposed corresponding to each other and together generate a preload force so that the movable carrier can be rotatably and more stably disposed on the fixed base. For example, an interaction between the guiding yoke and the guiding magnet exerts a preload force on the movable carrier in a direction towards the fixed base. Therefore, the assembly stability between the movable carrier and the fixed base can be increased.
According to the present disclosure, a camera module is provided. The camera module includes an image sensor and the aforementioned image stabilization lens module, and the image sensor is disposed on an image surface of the optical lens assembly.
According to the present disclosure, an electronic device is provided. The electronic device includes the aforementioned camera module.
According to the present disclosure, the aforementioned features and conditions can be utilized in numerous combinations so as to achieve corresponding effects.
According to the above description of the present disclosure, the following specific embodiments are provided for further explanation.
In this embodiment, a camera module 1 is provided. The camera module 1 includes an image stabilization lens module 2 and an image sensor ISU. In addition, the image stabilization lens module 2 includes an optical lens assembly 21, a lens holder 22, a casing 20, a fixed base 23, a light-folding element 24, a movable carrier 25, a plastic swing element 26, a flexible printed circuit board 27 and a driving mechanism 28. The image sensor ISU is disposed on an image surface of the optical lens assembly 21.
The optical lens assembly 21 includes a plurality of optical lens elements, and an optical axis passes through the optical lens elements. Furthermore, the lens holder 22 holds the optical lens elements of the optical lens assembly 21.
The light-folding element 24 is located on an object side of the lens holder 22, and the light-folding element 24 is configured to fold the optical axis. Furthermore, the light-folding element 24 is configured to redirect an incident light traveling along the optical axis towards the lens holder 22, so that the light passes through the optical lens elements of the optical lens assembly 21. In this embodiment, the light-folding element 24 is a prism.
The casing 20 is disposed on the fixed base 23, and the casing 20 and the fixed base 23 together form an accommodation space S. The movable carrier 25 is rotatably disposed in the accommodation space S and carries the light-folding element 24, and the movable carrier 25 is configured to bring the light-folding element 24 to rotate together.
The fixed base 23 is connected to the movable carrier 25 via an elastic element EC, and the elastic element EC exerts a preload force on the movable carrier 25 in a direction towards the fixed base 23.
The plastic swing element 26 is disposed between the movable carrier 25 and the fixed base 23, and the plastic swing element 26 is in physical contact with the movable carrier 25 and the fixed base 23. In specific, as shown in
The carrier support structure 261 is disposed on the carrier corresponsive surface CS, the carrier support structure 261 supports and is connected to the movable carrier 25, and the carrier support structure 261 is in physical contact with the movable carrier 25. In detail, as shown in
The base support structure 262 is disposed on the base corresponsive surface BS, and the base support structure 262 is connected to the fixed base 23, so that the fixed base 23 supports the plastic swing element 26. Moreover, the base support structure 262 is in physical contact with the fixed base 23. In detail, as shown in
The carrier auxiliary structure 263 is disposed on the base corresponsive surface BS, and the carrier auxiliary structure 263 is disposed opposite to the carrier support structure 261. In addition, as shown in
The base auxiliary structure 264 is disposed on the carrier corresponsive surface CS, and the base auxiliary structure 264 is disposed opposite to the base support structure 262. In addition, as shown in
In this embodiment, the plastic swing element 26 is one-piece formed by plastic injection molding, and the carrier auxiliary structure 263, the base auxiliary structure 264 and the main body 260 of the plastic swing element 26 are formed in one piece. As shown in
The flexible printed circuit board 27 is attached to the fixed base 23.
The driving mechanism 28 is configured to drive the movable carrier 25 to rotate relative to the fixed base 23 in the first rotation direction DR1 (and the opposite direction DP1) and/or the second rotation direction DR2 (and the opposite direction DP2), so that the light-folding element 24 disposed on the movable carrier 25 can be rotated together relative to the fixed base 23. In specific, as shown in
When a maximum field of view of the optical lens assembly 21 is FOV, the following condition is satisfied: 1 degree<FOV<50 degrees.
In this embodiment, a camera module 1b is provided. The camera module 1b includes an image stabilization lens module 2b and an image sensor ISU. In addition, the image stabilization lens module 2b includes a casing 20b, a fixed base 23b, an optical lens assembly 21b, a lens holder 22b, a light-folding element 24b, a movable carrier 25b, a swing element 26b, a flexible printed circuit board 27b and a driving mechanism 28b. The image sensor ISU is disposed on an image surface of the optical lens assembly 21b.
The casing 20b is disposed on the fixed base 23b, and the casing 20b and the fixed base 23b together form an accommodation space S for the optical lens assembly 21b, the lens holder 22b, the light-folding element 24b, the movable carrier 25b, the swing element 26b and the driving mechanism 28b to be disposed therein.
The optical lens assembly 21b includes a plurality of optical lens elements, and an optical axis passes through the optical lens elements. Furthermore, the lens holder 22b holds the optical lens elements of the optical lens assembly 21b.
The light-folding element 24b is located on an image side of the lens holder 22b, and the light-folding element 24b is configured to fold the optical axis. Furthermore, the light-folding element 24b is configured to redirect light coming from the optical lens assembly 21b. As shown in
The movable carrier 25b carries the light-folding element 24b, and the movable carrier 25b is configured to bring the light-folding element 24b to rotate together.
The fixed base 23b is connected to the movable carrier 25b via an elastic element EC, and the elastic element EC exerts a preload force on the movable carrier 25b in a direction towards the fixed base 23b.
The swing element 26b is disposed between the movable carrier 25b and the fixed base 23b, and the swing element 26b is in physical contact with the movable carrier 25b and the fixed base 23b. In specific, as shown in
The carrier support structure 261b is disposed on the carrier corresponsive surface CS, the carrier support structure 261b supports and is connected to the movable carrier 25b, and the carrier support structure 261b is in physical contact with the movable carrier 25b. In detail, as shown in
The base support structure 262b is disposed on the base corresponsive surface BS, and the base support structure 262b is connected to the fixed base 23b, so that the fixed base 23b supports the swing element 26b. Moreover, the base support structure 262b is in physical contact with the fixed base 23b. In detail, as shown in
The carrier auxiliary structure 263b is disposed on the base corresponsive surface BS, and the carrier auxiliary structure 263b is disposed opposite to the carrier support structure 261b. In addition, as shown in
The base auxiliary structure 264b is disposed on the carrier corresponsive surface CS, and the base auxiliary structure 264b is disposed opposite to the base support structure 262b. In addition, as shown in
In this embodiment, the carrier auxiliary structure 263b, the base auxiliary structure 264b and the main body 260b of the swing element 26b are formed in one piece.
The flexible printed circuit board 27b is attached to the fixed base 23b. In this embodiment, the image sensor ISU is disposed on the flexible printed circuit board 27b.
The driving mechanism 28b is configured to drive the movable carrier 25b to rotate relative to the fixed base 23b in the first rotation direction DR1 (and the opposite direction DP1) and/or the second rotation direction DR2 (and the opposite direction DP2), so that the light-folding element 24b disposed on the movable carrier 25b can be rotated together relative to the fixed base 23b. In specific, as shown in
When a maximum field of view of the optical lens assembly 21b is FOV, the following condition is satisfied: 1 degree<FOV<50 degrees.
In this embodiment, a camera module 1c is provided. The camera module 1c includes an image stabilization lens module 2c and an image sensor ISU. In addition, the image stabilization lens module 2c includes an optical lens assembly 21c, a lens holder 22c, a casing 20c, a fixed base 23c, a light-folding element 24c, a movable carrier 25c, a plastic swing element 26c, a flexible printed circuit board 27c and a driving mechanism 28c. The image sensor ISU is disposed on an image surface of the optical lens assembly 21c.
The optical lens assembly 21c includes a plurality of optical lens elements, and an optical axis passes through the optical lens elements. Furthermore, the lens holder 22c holds the optical lens elements of the optical lens assembly 21c.
The light-folding element 24c is located on an object side of the lens holder 22c, and the light-folding element 24c is configured to fold the optical axis. Furthermore, the light-folding element 24c is configured to redirect an incident light traveling along the optical axis towards the lens holder 22c, so that the light passes through the optical lens elements of the optical lens assembly 21c. In this embodiment, the light-folding element 24c is a prism.
The casing 20c is disposed on the fixed base 23c, and the casing 20c and the fixed base 23c together form an accommodation space S. The movable carrier 25c is rotatably disposed in the accommodation space S and carries the light-folding element 24c, and the movable carrier 25c is configured to bring the light-folding element 24c to rotate together.
The fixed base 23c is connected to the movable carrier 25c via an elastic element EC, and the elastic element EC exerts a preload force on the movable carrier 25c in a direction towards the fixed base 23c.
The plastic swing element 26c is disposed between the movable carrier 25c and the fixed base 23c, and the plastic swing element 26c is in physical contact with the movable carrier 25c and the fixed base 23c. In specific, as shown in
The carrier support structure 261c is disposed on the carrier corresponsive surface CS, the carrier support structure 261c supports and is connected to the movable carrier 25c, and the carrier support structure 261c is in physical contact with the movable carrier 25c. In detail, as shown in
The base support structure 262c is disposed on the base corresponsive surface BS, and the base support structure 262c is connected to the fixed base 23c, so that the fixed base 23c supports the plastic swing element 26c. Moreover, the base support structure 262c is in physical contact with the fixed base 23c. In detail, as shown in
The carrier auxiliary structure 263c is disposed on the base corresponsive surface BS, and the carrier auxiliary structure 263c is disposed opposite to the carrier support structure 261c. In addition, as shown in
The base auxiliary structure 264c is disposed on the carrier corresponsive surface CS, and the base auxiliary structure 264c is disposed opposite to the base support structure 262c. In addition, as shown in
In this embodiment, the carrier auxiliary structure 263c, the base auxiliary structure 264c and the main body 260c of the plastic swing element 26c are formed in one piece. As shown in
The flexible printed circuit board 27c is attached to the fixed base 23c.
The driving mechanism 28c is configured to drive the movable carrier 25c to rotate relative to the fixed base 23c in the first rotation direction DR1 (and the opposite direction DP1) and/or the second rotation direction DR2 (and the opposite direction DP2), so that the light-folding element 24c disposed on the movable carrier 25c can be rotated together relative to the fixed base 23c. In specific, as shown in
In this embodiment, a camera module 1d is provided. The camera module 1d includes an image stabilization lens module 2d and an image sensor ISU. In addition, the image stabilization lens module 2d includes a casing 20d, a fixed base 23d, an optical lens assembly 21d, a lens holder 22d, two light-folding elements 24d, a movable carrier 25d, a swing element 26d, a flexible printed circuit board 27d, a first driving mechanism 28d, a second driving mechanism 29d, a third driving mechanism 30d, a guiding yoke 31d and a guiding magnet 32d. The image sensor ISU is disposed on an image surface of the optical lens assembly 21d.
The casing 20d includes a cover 201d and a frame body 202d, and the cover 201d is assembled to the frame body 202d. The fixed base 23d is disposed on the frame body 202d of the casing 20d, and the fixed base 23d and the casing 20d together form an accommodation space S for the optical lens assembly 21d, the lens holder 22d, the light-folding elements 24d, the movable carrier 25d, the swing element 26d, the flexible printed circuit board 27d, the first driving mechanism 28d, the second driving mechanism 29d, the third driving mechanism 30d and the guiding yoke 31d to be disposed therein. The optical lens assembly 21d includes a plurality of optical lens elements, and an optical axis passes through the optical lens elements. Furthermore, the lens holder 22d holds the optical lens elements of the optical lens assembly 21d.
The light-folding elements 24d are respectively located on an object side and an image side of the lens holder 22d, and the light-folding elements 24d are configured to fold the optical axis, so that light changes its traveling direction multiple times in the image stabilization lens module 2d. Furthermore, the light-folding element 24d located on the object side of the lens holder 22d is configured to redirect an incident light traveling along the optical axis towards the lens holder 22d so that the light passes through the optical lens elements of the optical lens assembly 21d, and the light-folding element 24d located on the image side of the lens holder 22d is configured to redirect the light coming from the optical lens assembly 21d. In this embodiment, the two light-folding elements 24d are prisms, and by selecting prism(s) with a certain reflective index, the light can undergo total internal reflection(s) in at least one of the light-folding elements 24d.
The movable carrier 25d is rotatably disposed in the accommodation space S and carries the light-folding element 24d located on the image side of the lens holder 22d, and the movable carrier 25d is configured to bring the light-folding element 24d located on the image side of the lens holder 22d to rotate together. In this embodiment, the light-folding element 24d located on the object side of the lens holder 22d is fixed to the frame body 202d of the casing 20d.
The fixed base 23d is connected to the movable carrier 25d via an elastic element EC, and the elastic element EC exerts a preload force on the movable carrier 25d in a direction towards the fixed base 23d.
The swing element 26d is disposed between the movable carrier 25d and the fixed base 23d, and the swing element 26d is in physical contact with the movable carrier 25d and the fixed base 23d. In specific, as shown in
The main support ball 265d supports and is connected to the movable carrier 25d, and the main support ball 265d is in physical contact with the movable carrier 25d. In detail, as shown in
The auxiliary balls 266d are connected to the fixed base 23d, so that the fixed base 23d supports the swing element 26d, and the auxiliary balls 266d are in physical contact with the fixed base 23d. In detail, as shown in
The flexible printed circuit board 27d is attached to the fixed base 23d.
The first driving mechanism 28d is configured to drive the movable carrier 25d to rotate relative to the fixed base 23d in a first rotation direction DR1 or a direction DP1 opposite to the first rotation direction DR1 (e.g., a yaw direction of the movable carrier 25d), so that the light-folding element 24d disposed on the movable carrier 25d can be rotated together relative to the fixed base 23d in the first rotation direction DR1 or the opposite direction DP1. In specific, as shown in
The second driving mechanism 29d is configured to drive the movable carrier 25d to rotate relative to the fixed base 23d in a second rotation direction DR2 or a direction DP2 opposite to the second rotation direction DR2 (e.g., a pitch direction of the movable carrier so that the light-folding element 24d disposed on the movable carrier 25d can be rotated together relative to the fixed base 23d in the second rotation direction DR2 or the opposite direction DP2. In specific, as shown in
In this embodiment, the rotation axis of the first rotation direction DR1 is orthogonal to the rotation axis of the second rotation direction DR2.
The third driving mechanism 30d includes a plurality of rollable elements 301d, a third coil 302d and a third magnet 303d. The rollable elements 301d are respectively and rollably disposed in guiding grooves 2020d of the frame body 202d and clamped between the lens holder 22d and the frame body 202d. The third coil 302d is disposed on the flexible printed circuit board 27d, and the third magnet 303d is fixed to the lens holder 22d. Moreover, the flexible printed circuit board 27d is configured to provide a driving current to the third coil 302d. The third coil 302d and the third magnet 303d face each other so as to provide a driving force to move the lens holder 22d, and the lens holder 22d is movable in the direction parallel to the optical axis (i.e., the part of the optical axis between the two light-folding elements 24d) with the collaboration of the rollable elements 301d, thereby providing auto focusing function.
The guiding yoke 31d is disposed on the movable carrier 25d, and the guiding magnet 32d is disposed on the fixed base 23d. The guiding yoke 31d and the guiding magnet 32d are disposed corresponding to each other and together generate a preload force. In this embodiment, an interaction between the guiding yoke 31d and the guiding magnet 32d exerts a preload force on the movable carrier 25d in a direction towards the fixed base 23d.
When a maximum field of view of the optical lens assembly 21d is FOV, the following condition is satisfied: 1 degree<FOV<50 degrees.
Please refer to
In this embodiment, the electronic device 6 is a smartphone including a plurality of camera modules, a flash module 61, a focus assist module 62, an image signal processor 63, a display module (user interface) 64 and an image software processor (not shown).
The camera modules include an ultra-wide-angle camera module 60a, a high pixel camera module 60b and a telephoto camera module 60c. Moreover, at least one of the 20 camera modules 60a, 60b and 60c includes the image stabilization lens module of the present disclosure.
The image captured by the ultra-wide-angle camera module 60a enjoys a feature of multiple imaged objects.
The image captured by the high pixel camera module 60b enjoys a feature of high resolution and less distortion, and the high pixel camera module 60b can capture part of the image in
The image captured by the telephoto camera module 60c enjoys a feature of high optical magnification, and the telephoto camera module 60c can capture part of the image in
When a user captures images of an object, the light rays converge in the ultra-wide-angle camera module 60a, the high pixel camera module 60b or the telephoto camera module 60c to generate images, and the flash module 61 is activated for light supplement. The focus assist module 62 detects the object distance of the imaged object to achieve fast auto focusing. The image signal processor 63 is configured to optimize the captured image to improve image quality and provided zooming function. The light beam emitted from the focus assist module 62 can be either conventional infrared or laser. The display module 64 can include a touch screen, and the user is able to interact with the display module 64 to adjust the angle of view and switch between different camera modules, and the image software processor having multiple functions to capture images and complete image processing. Alternatively, the user may capture images via a physical button. The image processed by the image software processor can be displayed on the display module 64.
Please refer to
In this embodiment, the electronic device 7 is a smartphone including a camera module 70, a camera module 70a, a camera module 70b, a camera module 70c, a camera module 70d, a camera module 70e, a camera module 70f, a camera module 70g, a camera module 70h, a flash module 71, an image signal processor, a display module and an image software processor (not shown). The camera module 70 includes the image stabilization lens module 2d as disclosed in the 4th embodiment of the present disclosure. The camera module 70, the camera module 70a, the camera module 70b, the camera module 70c, the camera module 70d, the camera module 70e, the camera module 70f, the camera module and the camera module 70h are disposed on the same side of the electronic device 7, while the display module is disposed on the opposite side of the electronic device 7.
The camera module 70 is a telephoto camera module, the camera module 70a is a telephoto camera module, the camera module 70b is a telephoto camera module, the camera module 70c is a telephoto camera module, the camera module 70d is a wide-angle camera module, the camera module 70e is a wide-angle camera module, the camera module 70f is an ultra-wide-angle camera module, the camera module 70g is an ultra-wide-angle camera module, and the camera module 70h is a ToF (time of flight) camera module. In this embodiment, the camera module 70, the camera module 70a, the camera module 70b, the camera module 70c, the camera module 70d, the camera module the camera module 70f and the camera module 70g have different fields of view, such that the electronic device 7 can have various magnification ratios so as to meet the requirement of optical zoom functionality. In addition, the camera module 70 and the camera module 70a are telephoto camera modules having a light-folding element configuration. In addition, the camera module 70h can determine depth information of the imaged object. In this embodiment, the electronic device 7 includes multiple camera modules 70, 70a, 70b, 70c, 70d, 70e, 70f, 70g, and 70h, but the present disclosure is not limited to the number and arrangement of camera module. When a user captures images of an object, the light rays converge in the camera module 70, 70a, 70b, 70c, 70d, 70e, 70f, or 70h to generate an image(s), and the flash module 71 is activated for light supplement. Further, the subsequent processes are performed in a manner similar to the abovementioned embodiments, so the details in this regard will not be provided again.
Please refer to
In this embodiment, the electronic device 8 is an automobile. The electronic device 8 includes a plurality of automotive camera modules 80, and the camera modules 80, for example, each includes the camera module of the present disclosure. The camera modules 80 can be served as, for example, panoramic view car cameras, dashboard cameras and vehicle backup cameras.
As shown in
As shown in
As shown in
The smartphones, panoramic view car cameras, dashboard cameras and vehicle backup cameras in the embodiments are only exemplary for showing the image stabilization lens module and the camera module of the present disclosure installed in an electronic device, and the present disclosure is not limited thereto. The image stabilization lens module and the camera module can be optionally applied to optical systems with a movable focus. Furthermore, the image stabilization lens module and the camera module feature good capability in aberration corrections and high image quality, and can be applied to 3D (three-dimensional) image capturing applications, in products such as digital cameras, mobile devices, digital tablets, smart televisions, network surveillance devices, multi-camera devices, image recognition systems, motion sensing input devices, wearable devices and other electronic imaging devices.
The foregoing description, for the purpose of explanation, has been described with reference to specific embodiments. It is to be noted that the present disclosure shows different data of the different embodiments; however, the data of the different embodiments are obtained from experiments. The embodiments were chosen and described in order to best explain the principles of the disclosure and its practical applications, to thereby enable others skilled in the art to best utilize the disclosure and various embodiments with various modifications as are suited to the particular use contemplated. The embodiments depicted above and the appended drawings are exemplary and are not intended to be exhaustive or to limit the scope of the present disclosure to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings.
This application claims priority to U.S. Provisional Application 63/389,760, filed on Jul. 15, 2022, which is incorporated by reference herein in its entirety.
Number | Date | Country | |
---|---|---|---|
63389760 | Jul 2022 | US |