Lens driving device, camera module and electronic device

Abstract

The utility model relates to a kind of lens driving device, camera module and electronic equipment, including base, and distribution is at least one carrier and image sensor of first axis, at least one the carrier is driven along the first axis under the drive of drive assembly, still be provided with light shielding member between the carrier and the image sensor on the base, the light shielding member is in any one of annular structure and non-annular structure.Optical advantage is compared with the prior art, the advantages of the application include: by setting light shielding member on base and integrating stray light processing structure in moving carrier moving end, effectively inhibit reflected stray light, solve the reflection problem possibly caused in dynamic operation of moving carrier itself.

Description

Technical Field

[0001] This utility model belongs to the field of digital photography components, and particularly relates to a lens driving device, a camera module and an electronic device. Background Technology

[0002] In existing mobile phones and other electronic devices, there are often camera modules. As the moving carrier in the camera module moves the lens group along the optical axis during zooming / focusing, the moving carrier itself becomes a dynamic reflection source. These reflected rays directly hit the image sensor or lens group, causing ghosting, glare, or reduced image contrast. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems by providing a lens driving device, camera module, and electronic device that can solve the above-mentioned technical issues.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A lens driving device includes a base, at least one carrier and an image sensor distributed along a first axis, wherein at least one of the carriers moves along the first axis under the drive of a driving assembly, and a light-shielding member is provided on the base between the carrier and the image sensor, wherein the light-shielding member is either a ring structure or a non-ring structure.

[0005] Furthermore, a stray light treatment structure is provided on the side of the carrier near the light-shielding member, and the stray light treatment structure is either a ring structure or a non-ring structure.

[0006] Furthermore, the stray light processing structure includes any one or a combination of an inclined light-absorbing layer and an end-face light-absorbing layer, wherein the inclined light-absorbing layer and the end-face light-absorbing layer are angularly distributed and both the inclined light-absorbing layer and the end-face light-absorbing layer are angularly positioned relative to the first axis.

[0007] Furthermore, a crossbeam is provided on the side of the motion carrier near the light-shielding member, and the stray light treatment structure is provided on the crossbeam.

[0008] Furthermore, the light-shielding component includes at least one annular light-shielding plate.

[0009] Furthermore, there are two annular light-shielding plates, defined as a first annular light-shielding plate and a second annular light-shielding plate arranged sequentially along the first axis.

[0010] Furthermore, a spacer is provided between the two annular light-shielding plates.

[0011] Furthermore, the light-shielding member has a first inclined chamfer on the side near the carrier, and / or the light-shielding member has a second inclined chamfer on the side near the image sensor.

[0012] As one application, this application also provides a camera module, which includes the lens driving device described above.

[0013] As one application, this application also provides an electronic device, which includes the aforementioned camera module.

[0014] Compared with existing technologies, the advantages of this application include: by setting a light-shielding component on the base and integrating a stray light processing structure at the moving end of the moving carrier, reflected stray light is effectively suppressed, solving the reflection problem that may be caused by the moving carrier itself during dynamic operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the finished lens driving device of this utility model. Figure 2 This is an exploded schematic diagram of the lens driving device component of this utility model; Figure 3 Two exploded schematic diagrams of the lens driving device components of this utility model; Figure 4 A schematic diagram showing the specific distribution of the stray light processing structure of this utility model; Figure 5 This is an assembly diagram of the light-shielding component of this utility model; Figure 6 for Figure 5 Enlarged detail image of some components in area A; Figure 7 Three exploded schematic diagrams of the lens driving device components of this utility model; Figure 8 for Figure 7 Enlarged detail image of some components in area B; Figure 9 This is a schematic diagram showing the positional distribution of the motion carrier and the light-shielding component of this utility model; Figure 10 Two figures illustrate the specific distribution of the stray light processing structure of this utility model; Figure 11 This is a schematic diagram illustrating an example of an electronic device in Embodiment 3.

[0016] In the figure, there are: base 1, receiving groove 11, positioning protrusion 111, carrier 2, crossbeam 21, driving assembly 3, driving magnet 31, driving coil 32, image sensor 4, light shielding component 5, annular light shield 51, first inclined chamfer 511, second inclined chamfer 512, spacer 52, positioning notch 53, stray light processing structure 6, inclined light absorbing layer 61, end face light absorbing layer 62, and first axis Z. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0018] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0021] Example 1

[0022] like Figure 1 , Figure 2 and Figure 4 As shown, the lens driving device includes a base 1 for supporting components, a carrier 2 disposed within the base 1 along a first axis Z and used to support a lens group, and an image sensor 4 disposed at one end of the base 1. In this embodiment, a prism assembly is also disposed on the side of the carrier 2 away from the image sensor 4. The prism assembly is used to reflect incoming light and then direct it through the lens group within the carrier 2 into the image sensor 4. In other embodiments, there are multiple carriers 2, some of which are movable relative to the base 1 along the first axis Z, while others are relative to the base 1. A light-shielding member 5 is located between the carrier 2 closest to the image sensor 4 and the image sensor 4. At least one carrier 2 can move along the first axis Z under the drive of the driving assembly 3 to achieve the zoom or focus movement of the lens driving device. A light-shielding member 5 is also provided on the base 1 between the carrier 2 and the image sensor 4, and a stray light processing structure 6 is provided on the side of the carrier 2 near the light-shielding member 5 to absorb stray light reflected from the light-shielding member 5.

[0023] Specifically, the light-shielding component 5 is fixedly installed on the base 1, and its main body is shaped as follows: Figure 5 The aperture structure shown has a specific shape, forming a light channel. The core function of the light-shielding component 5 is to physically isolate stray light on non-imaging beam paths, preventing unwanted light generated by reflection and scattering inside the device from directly illuminating the photosensitive surface of the image sensor 4.

[0024] like Figures 5-6 As shown, the light-shielding member 5 includes at least one annular light-shielding plate 51. Specifically, there are two annular light-shielding plates 51, arranged sequentially along the first axis Z direction, and a spacer 52 is provided between the two annular light-shielding plates 51 to form a "sandwich"-like structure. A first inclined chamfer 511 is provided on the inner edge of one annular light-shielding plate 51 near the stray light processing structure 6, and the first inclined chamfer 511 is inclined outward toward the stray light processing structure 6. The core design intent of the first inclined chamfer 511 is that when stray light (especially light incident at a small angle near the inner edge of the first light-shielding plate) shines on the surface of the first inclined chamfer 511, its inclined angle is used to actively reflect this part of the stray light that may originally be randomly scattered or adversely reflected to the area where the stray light processing structure 6 is located.

[0025] A second inclined chamfer 512 is provided on the inner edge of another annular light-shielding plate facing the image sensor 4. The second inclined chamfer 512 is inclined outward away from the stray light processing structure 6. It is specifically used to absorb or guide the back stray light reflected from the surface of the image sensor 4. This design ensures that the back-reflected light is efficiently absorbed by the light-shielding member 5, or is harmlessly scattered to non-sensitive areas through a specific tilt angle, avoiding its secondary reflection back to the sensor or optical lenses to form ghosting / flare.

[0026] In other embodiments, the light-shielding plate 51 may also be non-annular, for example, U-shaped, rectangular or other unclosed shapes when viewed along the first axis Z direction.

[0027] In other embodiments, a single light-shielding member 5 has a first inclined chamfer 511 on the side facing the carrier 2, and a second inclined chamfer 512 on the side facing the image sensor 4.

[0028] In this embodiment, two annular light-shielding plates 51 form a double physical barrier. This design significantly enhances the ability to block directly incident stray light and effectively reduces the possibility of light diffraction or scattering through the internal gaps or edges of the light-shielding member 5. The first light-shielding plate (closer to the carrier) is responsible for intercepting most of the initial stray light, while the second light-shielding plate (closer to the image sensor) acts as a supplementary barrier, intercepting secondary stray light that penetrates the edge of the first annular light-shielding plate 51 or is generated by the spacer 52 area.

[0029] The spacer 52 ensures a precise and constant axial distance between the two annular light-shielding plates 51, helping to precisely align the two annular light-shielding plates 51 and ensuring that their inner holes are strictly coaxial, guaranteeing an unobstructed main imaging optical path, while also ensuring the consistency of the stray light suppression structure. At the same time, the spacer 52 provides mechanical support for the relatively thin annular light-shielding plates 51, enhancing the structural rigidity and stability of the entire light-shielding component 5 and preventing deformation during device assembly or use.

[0030] However, even after processing, some stray light (especially light with a small incident angle or high energy) may still be reflected on the inner surface of the light-shielding member 5. If these reflected stray lights are not effectively eliminated, they may re-enter the imaging optical path, eventually forming ghosting, glare, or reducing image contrast on the image sensor 4, thus affecting the imaging quality.

[0031] like Figure 4 As shown, in order to completely solve the secondary stray light problem caused by the reflection of the light-shielding member 5 itself, this embodiment provides a stray light treatment structure 6 on the side of the carrier 2 near the light-shielding member 5. The position of the stray light treatment structure 6 is precisely designed so that it is always located on the expected path of the light reflected from the inner wall of the light-shielding member 5 throughout the entire stroke range of the carrier 2 moving along the first axis Z.

[0032] Furthermore, regarding the aforementioned stray light processing structure 6, the stray light processing structure 6 can be either a ring structure or a non-ring structure. In this embodiment, a non-ring structure stray light processing structure 6 is used as an example. In the implementation of the non-ring structure, such as... Figure 4 and Figure 10The stray light treatment structure 6 shown is fixedly installed at a specific position on the carrier 2 near the light-shielding member 5, and its distribution does not form a complete ring. Specifically, the carrier 2 has an integrally formed crossbeam 21 on the side near the light-shielding member 5, and the stray light treatment structure 6 is disposed on the crossbeam 21. The crossbeam 21 has an inclined surface for being disposed on the inclined light-absorbing layer 61, and an end face for being disposed on the end face light-absorbing layer 62. The inclined surface includes any one or a combination of two of the following: a planar inclined surface and an arc-shaped inclined surface.

[0033] The stray light processing structure 6 includes any one or a combination of an inclined light-absorbing layer 61 and an end-face light-absorbing layer 62, which are angularly distributed. The inclined light-absorbing layer 61 is disposed on a specific local area of ​​the crossbeam 21 near the light-shielding member 5, and its surface is inclined at an angle relative to the first axis Z. The inclined direction of the inclined light-absorbing layer 61 is inward from the side near the light-shielding member 5 towards the side away from the light-shielding member 5. The end-face light-absorbing layer 62 is disposed on a specific local area of ​​the moving crossbeam 21 near the light-shielding member 5, and this end-face area is perpendicular to the first axis Z. In this embodiment, the end-face light-absorbing layer 62 is located outside the inclined light-absorbing layer 61, making the inclined light-absorbing layer 61 closer to the first axis Z passing through the center of the image sensor 4. In this embodiment, the surfaces of the inclined light-absorbing layer 61 and / or the end-face light-absorbing layer 62 are blackened or coated with a light-shielding material.

[0034] In this embodiment, the light-shielding component 5 is SOMA light-shielding material. Of course, in other embodiments, it can also be made of other resins, fibers, or other materials.

[0035] In this embodiment, the spacer 52 is made of stamped metal or other plastic materials.

[0036] Among them, such as Figures 2-3 As shown, regarding the aforementioned driving component 3, the driving component 3 includes a driving magnet 31 and a driving coil 32. In this embodiment, to reduce the processing difficulty, the driving magnet 31 is placed on the carrier 2, and the aforementioned driving coil 32 is placed on the base 1.

[0037] And to reduce processing difficulty, such as Figures 7-8 As shown, the base 1 is also provided with a receiving groove 11 for accommodating the light-shielding member 5. Furthermore, the receiving groove 11 is also provided with a positioning protrusion 111 for quickly positioning the light-shielding member 5. Figure 9 As shown, the light-shielding member 5 is provided with a positioning notch 53 that corresponds to and matches the positioning protrusion 111. As a preferred embodiment, the positions of the positioning protrusion 111 and the positioning notch 53 can be interchanged.

[0038] Example 2

[0039] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference lies in that, for the lens driving device of Embodiment 1, the camera module of this embodiment includes a lens driving device.

[0040] A camera module is a complete photographic device, typically including multiple components such as a lens, storage medium, display screen, and control panel. Outside the camera module, it also includes an external housing, control interface, display screen, memory card slot, etc., forming a complete working system capable of performing various functions such as image capture, real-time preview, storage, playback / transmission, etc., representing a more advanced application.

[0041] Example 3

[0042] The structure and principle of this embodiment are basically the same as those of Embodiment 2. The difference is that, in relation to the camera module of Embodiment 2, the electronic device in this embodiment includes a camera module.

[0043] like Figure 11 As shown, electronic devices refer to those devices that rely on electronic technology to perform specific functions, such as processing signals, data, or converting energy. They are widely used in fields such as communication, computing, entertainment, and industrial control, including but not limited to smartphones, computers, televisions, audio systems, and medical instruments, which greatly improve the convenience and efficiency of modern life.

[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. Lens driving device comprising a base (1) and at least one carrier (2) and an image sensor (4) distributed along a first axis (Z), at least one of said carriers (2) being moved along said first axis (Z) under the drive of a drive assembly (3), characterized in that, A light-shielding member (5) is also provided on the base (1) between the carrier (2) and the image sensor (4), and the light-shielding member (5) is either a ring structure or a non-ring structure.

2. The lens driving device according to claim 1, characterized by A stray light treatment structure (6) is provided on the side of the carrier (2) near the light-shielding member (5), and the stray light treatment structure (6) is either a ring structure or a non-ring structure.

3. The lens driving device according to claim 2, characterized in that, The stray light processing structure (6) includes any one or a combination of an inclined light-absorbing layer (61) and an end-face light-absorbing layer (62). The inclined light-absorbing layer (61) and the end-face light-absorbing layer (62) are angularly distributed, and both the inclined light-absorbing layer (61) and the end-face light-absorbing layer (62) are angularly positioned relative to the first axis (Z).

4. The lens driving device according to claim 2, characterized in that, The carrier (2) has a crossbeam (21) on the side near the light-shielding member (5), and the stray light treatment structure (6) is located on the crossbeam (21).

5. The lens driving device according to claim 1, characterized in that, The light-shielding component (5) includes at least one annular light-shielding plate (51).

6. The lens driving device according to claim 5, characterized in that, There are two annular light-shielding plates (51), which are defined as a first annular light-shielding plate and a second annular light-shielding plate arranged sequentially along the first axis (Z).

7. The lens driving device according to claim 6, characterized in that, A spacer (52) is provided between the two annular light-shielding plates (51).

8. The lens driving device according to any one of claims 1-5, characterized in that, The light-shielding member (5) has a first inclined chamfer (511) on the side near the carrier (2), and / or the light-shielding member (5) has a second inclined chamfer (512) on the side near the image sensor (4).

9. A camera module, characterized in that, The camera module includes the lens driving device according to any one of claims 1-8.

10. An electronic device, characterized in that, The electronic device includes the camera module as described in claim 9.

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