Polarization assembly and camera module with same

Abstract

The invention provides a polarization assembly and a camera module with the polarization assembly, the polarization assembly comprises a base, a polarization mechanism and at least one driving mechanism, and the base is provided with an accommodating space; wherein the polarization mechanism is rotatably arranged in the accommodating space of the base; wherein the at least one driving mechanism is connected with the polarization mechanism, the driving mechanism comprises a piezoelectric element and an iron ring, the iron ring is arranged on the support of the polarization mechanism, the piezoelectric element is connected with the iron ring, and the piezoelectric element and the iron ring are in a pre-tightening pressed state. When the piezoelectric element is electrically conducted, friction force generated between the piezoelectric element and the iron ring drives the polarization mechanism to move so as to change the polarization direction of the polarization assembly.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and in particular to a polarization component and a camera module with the polarization component. Background Art

[0002] The camera module is one of the necessary components for taking photos in electronic terminals. At present, the imaging requirements of the camera module are getting higher and higher. In order to achieve high-quality image capture, the parameter adjustment for different shooting environments is also taken into account. The brightness of the image captured by the camera module is related to the exposure of the image, and the exposure of the image is related to the amount of light entering the camera. However, whether the brightness of the image is too high or too low, it will affect the clarity of the image.

[0003] Polarizing films have the function of shielding and transmitting incident light and are widely used in camera photography, especially outdoor photography. They can filter reflected light, increase imaging contrast, effectively reduce or eliminate reflections on non-metallic surfaces, effectively increase color saturation, and improve contrast.

[0004] When shooting with a camera, a polarizing filter is installed and screwed onto the lens. By manually rotating the upper circle, the angle at which light enters the camera is changed to eliminate the reflection of the object and increase the saturation of the photo. For example, in scene and landscape photography, it is often used to show the texture of objects in strong reflections, highlight the scenery behind the glass, darken the sky, and show blue sky and white clouds. For example, shooting objects in water or in a window makes the objects clearer. In addition, shooting plants with a large amount of water, the leaves reflect light and polarize to make the leaves greener. However, polarizing filters are not required in every scene. In low light conditions, the presence of polarizing filters will make the image darker and affect the image quality. In addition, manually rotating and adjusting the angle of the polarizing filter also makes it more difficult to use the polarizing filter.

[0005] In the prior art, the application of polarizing filters in camera lenses is still difficult to meet the requirements, because not only does it need to be selected based on the scene whether to use the polarizing filter, but even when using the polarizing filter, it is also necessary to consider the polarization direction of the polarizing filter to obtain a good shooting effect. In addition, the addition of polarizing films will inevitably increase the overall height of the module, which cannot meet the requirements of mobile electronic devices for miniaturization and thinness. Summary of the invention

[0006] A major advantage of the present invention is that it provides a polarization component and a camera module with a polarization component, wherein the polarization component is arranged in front of the lens component of the camera module, and determines whether to use the polarization structure according to the shooting environment and image information feedback, and adjusts the phase of the polarizer according to the actual image information, thereby filtering unnecessary light to achieve better imaging saturation.

[0007] Another advantage of the present invention is that it provides a polarization component and a camera module with a polarization component, wherein when the camera module takes an image, by analyzing information of multiple feature areas in the image, it is determined whether a polarization element is needed and the deflection angle of the polarization element, and the polarization element is moved and rotated to take a second image to obtain a good shooting effect.

[0008] Another advantage of the present invention is that it provides a polarization component and a camera module with a polarization component, wherein the polarization component includes a polarizer and a driving mechanism that can drive the polarizer to rotate, and the driving mechanism is a piezoelectric element, which is conducive to simplifying the overall structure of the camera module.

[0009] Another advantage of the present invention is that it provides a polarization component and a camera module with a polarization component, wherein the driving mechanism of the polarization component is arranged on the outer peripheral side of the polarizer, which is beneficial to reducing the overall height of the polarization component and realizing the miniaturization and thinness of the camera module.

[0010] According to one aspect of the present invention, a polarization component of the present invention that can achieve the above-mentioned objects and other objects and advantages includes:

[0011] A base, wherein the base is provided with a containing space;

[0012] a polarizing mechanism, wherein the polarizing mechanism is rotatably disposed in the accommodating space of the base; and

[0013] At least one driving mechanism, wherein the at least one driving mechanism is connected to the polarizing mechanism, the driving mechanism comprises a piezoelectric element and an iron ring, wherein the iron ring is arranged on the bracket of the polarizing mechanism, the piezoelectric element is connected to the iron ring, and the piezoelectric element and the iron ring are in a pre-tightened and compressed state, when the piezoelectric element is electrically conductive, the friction force generated between the piezoelectric element and the iron ring drives the polarizing mechanism to move, so as to change the polarization direction of the polarization component.

[0014] According to one embodiment of the present invention, the polarization mechanism of the polarization component includes a polarizer and a bracket supporting the polarizer, wherein the polarizer is fixed to the bracket, the bracket is connected to the driving mechanism, and the driving mechanism drives the polarizer to move through the bracket.

[0015] According to one embodiment of the present invention, the bracket includes a bracket body and a bracket through hole formed in the bracket body, wherein the polarizer is fixed to the bracket body, and the direction of the central axis of the polarizer is parallel to the direction of the central axis of the bracket through hole.

[0016] According to an embodiment of the present invention, the iron ring is arranged on the outside of the bracket, and the iron ring is in a ring-shaped structure.

[0017] According to an embodiment of the present invention, the piezoelectric element is fixed on the base, and the piezoelectric element is positively opposite to the iron ring.

[0018] According to one embodiment of the present invention, the driving mechanism further includes a spring sheet, wherein the spring sheet is arranged on the base, the spring sheet is located on the outside of the piezoelectric element, and the spring sheet is in a compressed pre-tightened state, which provides pre-tightening pressure for the piezoelectric element.

[0019] According to one embodiment of the present invention, the base includes a base substrate and a base wall formed on the base substrate, the base substrate and the base wall form the accommodating space, and the polarizing mechanism is rotatably disposed in the accommodating space of the base.

[0020] According to one embodiment of the present invention, the base is further provided with at least one mounting groove, wherein the piezoelectric element and the spring are mounted in the mounting groove of the base.

[0021] According to one embodiment of the present invention, the polarization component further includes a supporting mechanism, which is arranged between the base and the polarizing mechanism and is used to support the polarizing mechanism. The supporting mechanism includes at least three supporting units, wherein the at least three supporting units are arranged on the base, and the bracket of the at least three supporting units supporting the polarizing mechanism is located above the base.

[0022] According to one embodiment of the present invention, the at least three supporting units of the supporting mechanism are constructed as steel balls, wherein the supporting units are rollably arranged between the bracket and the base of the polarizing mechanism, and at least three accommodating grooves for accommodating the supporting mechanism are provided between the base and the bracket.

[0023] According to one embodiment of the present invention, it further comprises a circuit board, wherein the circuit board is electrically connected to the piezoelectric element of the driving mechanism.

[0024] According to one embodiment of the present invention, it further includes a shell, wherein the shell is arranged above the base, the polarizing mechanism and the driving mechanism, the shell is buckled above the base, the shell includes a shell body and a side wall extending downward from the outer edge of the shell body, the inner side of the side wall of the shell is close to the base wall of the base, and the spring sheet of the driving mechanism is arranged between the side wall of the shell and the base wall, and the spring sheet is in a pre-tightened and compressed state between the side wall and the base wall.

[0025] According to another aspect of the present application, the present application further provides a camera module, including:

[0026] Photosensitive components;

[0027] lens assembly; and

[0028] A polarization component as described above, wherein the lens component and the polarization component are arranged at the front end of the photosensitive component along the light sensing path of the photosensitive component, and the polarization component is located at the front end of the light incident direction of the lens component.

[0029] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and the accompanying drawings.

[0030] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. In the accompanying drawings, unless otherwise specified, the same reference numerals are used to represent the same components. Among them:

[0032] Figure 1 It is a schematic diagram of the overall structure of a camera module according to the first preferred embodiment of the present invention.

[0033] Figure 2 It is a schematic structural diagram of a polarization component of the camera module according to the first preferred embodiment of the present invention.

[0034] Figure 3 is a schematic diagram of an exploded view of the polarization component according to the first preferred embodiment of the present invention.

[0035] Figure 4 is a cross-sectional view of the polarization component according to the first preferred embodiment of the present invention. DETAILED DESCRIPTION

[0036] It should be pointed out that the embodiments shown in the drawings are only used as examples to specifically and vividly explain and illustrate the concept of the present invention. The size and structure thereof are not necessarily drawn to scale, nor do they constitute a limitation to the concept of the present invention.

[0037] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the various drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0038] Referring to the drawings of this application specification Figures 1 to 4 As shown, a polarization component and a camera module with a polarization component according to the first preferred embodiment of the present application are explained in the following description. The camera module includes a photosensitive component 10, a lens component 20, and a polarization component 30 arranged at the light incident end of the lens component 20, wherein the lens component 20 is arranged on the photosensitive side of the photosensitive component 10 along the optical axis direction of the photosensitive component 10. The camera module is suitable for mobile electronic devices, such as mobile phones, wearable smart devices, etc., and determines whether to use a polarization structure according to the shooting environment and image information feedback during shooting, and adjusts the phase of the polarizer according to the actual image information, thereby filtering unnecessary light to make the imaging saturation better.

[0039] The polarization component 30 is located at the front end of the light incident direction of the lens assembly 20, that is, the light incident to the camera module passes through the polarization component 30 and the lens assembly 20 in sequence before reaching the photosensitive component 10. The polarization component 30 is provided with a light hole 302 for incident light to pass through, and the incident light incident from the outside passes through the light hole 302 of the polarization component 30 and then reaches the photosensitive component 10 through the lens assembly 20.

[0040] The polarization component 30 includes a base 31, a polarization mechanism 32 and at least one driving mechanism 33 disposed on the base 31, wherein the base 31 has a containing space 301, and the polarization mechanism 32 and the at least one driving mechanism 33 are disposed in the containing space 301 of the base 31. The driving mechanism 33 is disposed on the base 31, and the driving mechanism 33 is connected to the polarization mechanism 32, and the driving mechanism 33 can drive the polarization mechanism 32 to move based on the base 31 to adjust the polarization direction of the polarization component 30.

[0041] The polarizing mechanism 32 of the polarization component 30 includes a polarizer 321 and a bracket 322 supporting the polarizer 321, wherein the polarizer 321 is fixed to the bracket 322, and the bracket 322 is connected to the driving mechanism 33. The driving mechanism 33 drives the polarizer 321 to move through the bracket 322 to adjust the polarization direction of the polarization component 30.

[0042] The polarizer 321 is supported by the bracket 322 at the light hole 302 of the polarization component 30, and the incident light enters the polarizer 321 through the light hole 302 of the polarization component 30, and the polarizer 321 selectively blocks or transmits the incident light at a specific angle.

[0043] The bracket 322 includes a bracket body 3221 and a bracket through hole 3222 formed in the bracket body 3221, wherein the polarizer 321 is fixed to the bracket body 3221, and the direction of the central axis of the polarizer 321 is substantially parallel to the direction of the central axis of the bracket through hole 3222. The bracket body 3221 of the bracket 322 has a light incident side surface and a light emitting side surface, and preferably, in this preferred embodiment of the present application, the polarizer 321 is fixed to the light incident side surface of the bracket 322. Optionally, in another optional embodiment of the present application, the polarizer 321 is fixed in the bracket through hole 3222 of the bracket 322.

[0044] The bracket 322 carries the polarizer 321, and when the driving mechanism 33 is driven, the polarizer 321 is driven to move in a specific direction to adjust the polarization angle of the polarizer 321. In this preferred embodiment of the present application, the bracket 322 is rotatably disposed in the accommodating space 301 of the base 31, and the driving mechanism 33 can drive the bracket 322 and the polarizer 321 disposed on the bracket 322 to rotate in a specific direction in the accommodating space 301 of the base 31 to adjust the polarization direction of the incident light incident on the polarization component.

[0045] The driving mechanism 33 includes at least one piezoelectric element 331 and an iron ring 332 opposite to the at least one piezoelectric element 331, wherein the piezoelectric element 331 is arranged on the base 31, the iron ring 332 is connected to the bracket 322, and the iron ring and the piezoelectric element 321 are in a pre-tightened and compressed state. When the piezoelectric element 331 is electrically conducted, the piezoelectric element 331 and the iron ring 332 are tightly attached and generate friction, and the piezoelectric element 331 drives the iron ring 332 to rotate in a specific direction.

[0046] In the example, in the preferred embodiment of the present application, the iron ring 332 is arranged on the outside of the bracket 322, and the iron ring 332 is a ring-shaped structure. Preferably, in the preferred embodiment of the present application, the iron ring 332 is attached to the outside of the bracket 322.

[0047] The piezoelectric element 331 is fixed to the base 31, and the piezoelectric element 331 is positively opposite to the iron ring 332. When the piezoelectric element 331 is electrically conductive, the piezoelectric element 331 resonates, and the piezoelectric element 331 and the iron ring 332 move by squeezing each other. Preferably, in this preferred embodiment of the present application, the piezoelectric element 331 is located on the outside or inside of the annular structure of the iron ring 332.

[0048] The driving mechanism 33 further includes a spring sheet 333, wherein the spring sheet 333 is arranged on the base 31, the spring sheet 333 is located on the outside of the piezoelectric element 331, and the spring sheet 333 is in a compressed pre-tightened state, which provides pre-tightening pressure for the piezoelectric element 331, so that the piezoelectric element 331 and the iron ring 332 are only attached to each other, thereby increasing the friction between the piezoelectric element 331 and the iron ring 332 of the driving mechanism 33.

[0049] The spring sheet 333 is an elastic element such as an elastic metal spring sheet or a spring, which is arranged on the outside of the piezoelectric element 331. The spring sheet 333 is in a compressed and pre-tightened state on the outside of the piezoelectric element 331, providing pressure for the piezoelectric element 331 and the iron ring 331, so that when the piezoelectric element 331 is electrically conducted, the friction force between the piezoelectric element 331 and the iron ring 322 is used to drive the iron ring 332 to move.

[0050] The base 31 carries and supports the driving mechanism 33 and the polarizing mechanism 32, wherein the base 31 includes a base substrate 311 and a base wall 312 formed on the base substrate 311, the base substrate 311 and the base wall 312 form the accommodating space 301, and the driving mechanism 33 and the polarizing mechanism 32 are arranged in the accommodating space 301 of the base 31.

[0051] The accommodation space 301 formed by the base wall 312 of the base 31 is cylindrical, and the base wall 312 integrally extends upward from the base substrate 311 along the axial direction of the accommodation space 301. The polarizing mechanism 32 is rotatably arranged in the accommodation space 301 of the base 31, and the bracket 322 of the polarizing mechanism 32 and the iron ring 332 of the driving mechanism 33 are restricted by the base wall 312 of the base 31 to prevent the polarizer 321 from being deflected. In other words, the bracket 322 of the polarizing mechanism 32 and the iron ring 332 of the driving mechanism 33 are supported by the base substrate 311 of the base 31 and are retained in the accommodation space 301 by the base wall 312.

[0052] The piezoelectric element 331 of the driving mechanism 33 is disposed on the base wall 312 of the base 31. The base 31 is further provided with at least one mounting groove 313, wherein the piezoelectric element 331 and the spring 333 are mounted in the mounting groove 313 of the base 31. Preferably, in this preferred embodiment of the present application, the mounting groove 313 is formed on one side of the base wall 312 of the base 31, the mounting groove 313 communicates the inner side and the outer side of the base wall 312, or the mounting groove 313 is formed on the inner side of the base wall 312.

[0053] The base 31 further includes a plurality of bosses 314, wherein the bosses 314 are located above the base substrate 311 and inside the base wall 312. The bracket 322 of the polarizing mechanism 32 is disposed above the bosses 314 of the base 31, and the bosses 314 support the bracket 322 of the polarizing mechanism 32.

[0054] It should be noted that the boss 314 of the base 31 protrudes upward from the base substrate 311 , and the boss 314 of the base 31 and the base substrate 311 are an integrated structure.

[0055] The polarization assembly 30 further includes a supporting mechanism 34 , which is disposed between the base 31 and the polarizing mechanism 32 and is used to support the polarizing mechanism 32 . When the driving mechanism 33 drives the polarizing mechanism 32 to move, the polarizing mechanism 32 is allowed to rotate along a specific direction in the accommodating space 301 .

[0056] The support mechanism 34 includes at least three support units 341, wherein the at least three support units 341 are disposed on the base 31, and the at least three support units 341 support the bracket 322 of the polarizing mechanism 32 to be located above the boss 314. That is, in this preferred embodiment of the present application, the polarizing mechanism 32 is supported by the at least three support units 341 above the boss 341, so as to avoid friction between the bracket 322 of the polarizing mechanism 32 and the boss 341.

[0057] The at least three supporting units 341 of the supporting mechanism 34 are configured as steel balls, wherein the supporting units 341 are rollably disposed between the bracket 322 of the polarizing mechanism 32 and the base 31 .

[0058] Correspondingly, at least three receiving grooves 315 for receiving the support mechanism 34 are provided between the base 31 and the bracket 322. Preferably, in this preferred embodiment of the present application, the at least three receiving grooves 315 are formed on the upper surface of the boss 314 of the base 31. Optionally, in another optional embodiment of the present application, the at least three receiving grooves 315 are formed on the lower surface of the bracket 322.

[0059] It can be understood that the support unit 341 of the support mechanism 34 of the polarization component 30 supports the polarizing mechanism 32 to move in the accommodating space 301 in a rolling manner, and when the piezoelectric element 331 of the driving mechanism 33 is electrically conducted, the friction force between the piezoelectric element 331 and the iron ring 332 drives the bracket 322 of the polarizing mechanism 32 to rotate in a specific direction, and the bracket 322 of the polarizing mechanism 32 drives the polarizer 321 to rotate synchronously, thereby changing the polarization direction of the polarizer 321.

[0060] The polarization component 30 further includes a circuit board 35 , wherein the circuit board 35 is electrically connected to the piezoelectric element 321 of the driving mechanism 33 , and the circuit board 35 provides the driving mechanism 33 with the electrical energy required for operation.

[0061] The circuit board 35 of the polarization component 30 is disposed below the base 31. It is worth mentioning that in this preferred embodiment of the present application, the circuit board 35 is connected to the circuit board of the camera module, and when the camera module needs to adjust the polarization direction of the polarization component 30, the circuit board of the camera module is electrically connected to the driving mechanism 32 through the circuit board 35.

[0062] The polarization assembly 30 further includes a housing 36, wherein the housing 36 is disposed above the base 31, the polarizing mechanism 32, and the driving mechanism 33, and the housing 36 is buckled above the base 31. The housing 36 includes a housing body 361 and a side wall 362 extending downward from the outer edge of the housing body 361, wherein the housing body 361 covers the polarizing mechanism 32 and the driving mechanism 33 to prevent dust from entering the accommodating space 301. The side wall 362 of the housing 36 is buckled on the outer edge of the base 311 of the base 31.

[0063] The inner side of the side wall 362 of the shell 36 is close to the base wall 312 of the base 31, and the spring piece 333 of the driving mechanism 33 is arranged between the side wall 362 of the shell 36 and the base wall 312, and the spring piece 333 is in a pre-tightened and compressed state between the side wall 362 and the base wall 312.

[0064] like Figure 4 As shown, when the polarization direction of the polarization component 30 of the camera module needs to be adjusted, the circuit board 35 of the polarization component 30 is electrically connected to the driving mechanism 33, and the spring 333 of the driving mechanism 33 is between the housing 36 and the base 31, and is in a compressed state, and the spring 333 provides pre-tightening pressure for the piezoelectric element 331 and the iron ring 332 of the driving mechanism 33. The piezoelectric element 331 is electrically connected, and a friction force in the circumferential direction is generated between the iron ring 332 opposite to it, that is, the piezoelectric element 331 drives the iron ring 332 to rotate in its circumferential direction, and the iron ring 332 is attached to the outer side of the bracket 322 of the polarizing mechanism 32. Therefore, the iron ring 332 drives the bracket 322 of the polarizing mechanism 32 to rotate synchronously, wherein the bracket 322 drives the polarizer 321 to rotate, thereby adjusting the polarization direction of the polarization component 30.

[0065] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications all belong to the protection scope of the present invention.

Claims

1. A polarization component, characterized in that include: A base, wherein the base is provided with a containing space; A polarizing mechanism, wherein the polarizing mechanism is rotatably disposed in the accommodating space of the base; as well as At least one driving mechanism, wherein the at least one driving mechanism is connected to the polarizing mechanism, the driving mechanism comprises a piezoelectric element and an iron ring, wherein the iron ring is arranged in the polarizing mechanism, the piezoelectric element is connected to the iron ring, and the piezoelectric element and the iron ring are in a pre-tightened and compressed state, when the piezoelectric element is electrically conductive, the friction force generated between the piezoelectric element and the iron ring drives the polarizing mechanism to move, so as to change the polarization direction of the polarization component.

2. The polarization component according to claim 1, wherein the polarization mechanism of the polarization component comprises a polarizer and a bracket supporting the polarizer, wherein the polarizer is fixed to the bracket, the bracket is connected to the driving mechanism, and the driving mechanism drives the polarizer to move through the bracket.

3. The polarization component according to claim 2, wherein the bracket comprises a bracket body and a bracket through hole formed in the bracket body, wherein the polarizer is fixed to the bracket body, and the direction of the central axis of the polarizer is parallel to the direction of the central axis of the bracket through hole. 4 . The polarization assembly according to claim 3 , wherein the iron ring is arranged on the outside of the bracket, and the iron ring is in a ring-shaped structure. 5 . The polarization assembly according to claim 4 , wherein the piezoelectric element is fixed to the base, and the piezoelectric element is positively opposed to the iron ring.

6. The polarization component according to any one of claims 2 to 5, wherein the driving mechanism further comprises a spring sheet, wherein the spring sheet is arranged on the base, the spring sheet is located on the outside of the piezoelectric element, and the spring sheet is in a compressed pre-tightened state, which provides pre-tightening pressure for the piezoelectric element.

7. The polarization component according to claim 6, wherein the base comprises a base substrate and a base wall formed on the base substrate, the base substrate and the base wall form the accommodating space, and the polarizing mechanism is rotatably disposed in the accommodating space of the base. 8 . The polarization assembly according to claim 7 , wherein the base is further provided with at least one mounting groove, wherein the piezoelectric element and the spring are mounted in the mounting groove of the base.

9. A polarization component according to claim 8, wherein the polarization component further comprises a supporting mechanism, wherein the supporting mechanism is disposed between the base and the polarizing mechanism and is used to support the polarizing mechanism, wherein the supporting mechanism comprises at least three supporting units, wherein the at least three supporting units are disposed on the base, and the bracket of the at least three supporting units supporting the polarizing mechanism is located above the base.

10. The polarization component according to claim 9, wherein the at least three supporting units of the supporting mechanism are constructed as steel balls, wherein the supporting units are rollably arranged between the bracket and the base of the polarization mechanism, and at least three accommodating grooves for accommodating the supporting mechanism are provided between the base and the bracket.

11. The polarization assembly according to claim 10, further comprising a circuit board, wherein the circuit board is electrically connected to the piezoelectric element of the driving mechanism.

12. The polarization component according to claim 11 further includes a shell, wherein the shell is arranged above the base, the polarizing mechanism and the driving mechanism, the shell is buckled above the base, the shell includes a shell body and a side wall extending downward from the outer edge of the shell body, the inner side of the side wall of the shell is close to the base wall of the base, and the spring clip of the driving mechanism is arranged between the side wall of the shell and the base wall, and the spring clip is in a pre-tightened and compressed state between the side wall and the base wall.

13. A camera module, characterized in that: include: Photosensitive components; Lens assembly; as well as A polarization component as described in any one of claims 1 to 12, wherein the lens component and the polarization component are arranged at the front end of the photosensitive component along the light sensing path of the photosensitive component, and the polarization component is located at the front end of the light incident direction of the lens component.

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