CN116107132A - Film iris diaphragm, camera module and method for controlling light inlet quantity of camera module - Google Patents

Abstract

The invention discloses a film iris diaphragm, a camera shooting module and a method for controlling the light inlet quantity of the camera shooting module. The optical lens is arranged on a photosensitive path of the photosensitive assembly, the film iris is arranged on the outer side of the optical lens, the film iris further comprises at least two telescopic films, at least two driving electrodes and an optical inlet channel with a variable area, the at least two telescopic films are arranged around the optical axis of the camera module so as to define the optical inlet channel by the inner sides of the films of the at least two telescopic films, the driving electrodes are arranged on the outer sides of the films of the telescopic films, and when the driving electrodes apply an excitation electric signal to the telescopic films, the telescopic films are driven to allow the inner sides of the films of the telescopic films to move towards a direction close to or far away from the optical axis of the camera module.

Description

Thin film iris diaphragm, camera module and method for controlling the amount of light entering the camera module

technical field

The invention relates to an optical imaging device, in particular to a thin-film iris diaphragm, a camera module and a method for controlling the amount of light entering the camera module.

Background technique

The development trend of thinner and lighter portable electronic devices imposes strict requirements on the size of the camera module, which is one of the standard configurations of portable electronic devices. The requirements of electronic devices for the imaging quality of camera modules are also increasing accordingly. It can be understood that the imaging quality of the camera module is affected by many factors, such as pixel size, variable aperture and so on. The variable aperture of the existing camera module adopts a mechanical structure made of multiple metal sheets or perforated gratings, and controls the size of the area that blocks light through complex mechanical movements or overlapping, thereby realizing the adjustment of the amount of light entering. For example, the iris-type variable aperture is a circular structure with a central hole formed by a plurality of overlapping arc-shaped thin metal sheets, and the function of the iris-type variable aperture can be changed by mechanically operating the clutch of each metal sheet. The aperture size of the central circular hole enables the light to enter the optical lens of the camera module through the variable central circular hole, thereby realizing the control of the amount of incoming light. It is unavoidable that, on the one hand, since the iris-type variable aperture has a complex mechanical structure, and on the other hand, it needs to reserve space for the movement of the mechanical structure, the iris-type variable aperture needs to occupy a relatively large area of the camera module. Due to the large space, the size of the camera module cannot be further reduced, which in turn makes the camera module unable to meet the requirements of thinner and lighter portable electronic devices. In order to adapt to the development trend of thinner and lighter portable electronic devices, the size of the camera module must be strictly controlled, which leads to the camera module having to abandon the structure of the variable aperture, which makes the camera module unable to adjust the camera module The brightness and depth of field of the image taken by the group cannot present the image effect of blurred background.

Contents of the invention

One object of the present invention is to provide a thin-film iris diaphragm, a camera module and a method for controlling the amount of light entering the camera module, wherein the film iris can control the amount of light entering the camera module to adjust the amount of light entering the camera module. The brightness and depth of field of the image captured by the camera module.

One object of the present invention is to provide a thin-film iris diaphragm, a camera module and a method for controlling the amount of light entering the camera module, wherein the film iris forms a light-incoming channel to allow light to enter the camera module The optical lens of the present invention, wherein the film iris controls the amount of light entering the camera module by controlling the area of the light entering channel of the film iris.

One object of the present invention is to provide a film iris diaphragm, a camera module and a method for controlling the amount of light entering the camera module, wherein the film iris diaphragm does not need to occupy a height space when adjusting the area of the light entering channel , thus: on the one hand, the thin film iris itself can reduce the height of the camera module due to its thinner size; on the other hand, the iris film does not need to occupy the The height space of the module does not require the camera module to reserve a working space, and the height dimension of the camera module can be significantly reduced to meet the requirements of thinner and lighter electronic equipment.

An object of the present invention is to provide a film iris diaphragm, a camera module and a method for controlling the amount of light entering the camera module, wherein a driving electrode of the film iris diaphragm can drive the film outside the film of a stretch film The stretch film stretches to allow the inner side of the stretch film to move toward or away from the optical axis of the camera module, thereby controlling the area of the light entrance channel defined by the inner side of the stretch film .

According to one aspect of the present invention, the present invention provides a camera module, which includes:

a lens assembly, wherein the lens assembly includes an optical lens;

a photosensitive component, wherein the optical lens is held in the photosensitive path of the photosensitive component; and

A film iris diaphragm, wherein said film iris diaphragm is arranged outside said optical lens, wherein said film iris diaphragm further comprises at least two stretchable films and at least two driving electrodes and has a variable area The light entrance channel, at least two of the stretch films are arranged around the optical axis of the camera module, so that the light entrance channel is defined by the inner side of the film of at least two of the stretch films, and the driving electrodes are arranged on the The outer side of the stretchable film, wherein when the driving electrode applies an excitation electric signal to the stretchable film, the stretchable film is driven to allow the inner side of the stretchable film to face the light approaching or away from the camera module Axis direction movement.

According to an embodiment of the invention, at least one of said stretch films and the other of said stretch films have a height difference.

According to an embodiment of the present invention, the film iris diaphragm includes two stretch films and two drive electrodes, and each drive electrode is arranged on the outside of each stretch film.

According to an embodiment of the present invention, the film iris diaphragm includes four stretch films and four drive electrodes, and each drive electrode is respectively arranged on the outside of each stretch film.

According to an embodiment of the present invention, the inner sides of each stretchable film are arc-shaped, so that the inner sides of the two stretchable films can define a substantially circular light entrance channel.

According to an embodiment of the present invention, each of the stretch films is a semi-circular film.

According to an embodiment of the present invention, two said stretch films are arranged symmetrically.

According to an embodiment of the present invention, the four stretchable films are centrally symmetrical with the optical axis of the camera module as the axis of symmetry.

According to an embodiment of the present invention, each of the stretch films is a semicircular film, or each of the stretch films is a rectangular film.

According to an embodiment of the present invention, the optical lens includes a lens barrel and a series of optical lenses arranged on the lens barrel, wherein the end surface of the lens barrel has at least two mounting surfaces for mounting at least The two stretch films, wherein at least one of the mounting surfaces of the lens barrel and the other mounting surface have a height difference, so that at least one of the stretch films and the other stretch film have a height difference .

According to an embodiment of the present invention, the lens assembly includes a lens carrier, the optical lens is arranged on the lens carrier, wherein the end surface of the lens carrier has at least two mounting surfaces for mounting at least two There are two stretch films, wherein at least one of the mounting surfaces of the lens barrel has a height difference from the other mounting surface, so that at least one of the stretch films and the other stretch films have a height difference.

According to an embodiment of the present invention, the lens assembly includes a lens carrier, the optical lens is arranged on the lens carrier, and the optical lens includes a lens barrel and a series of optical lenses arranged on the lens barrel The lens, wherein the end surface of the lens carrier and the end surface of the lens barrel respectively form at least one mounting surface for mounting at least two of the stretch films, wherein the mounting surface of the lens carrier and the The mounting surface of the lens barrel has a height difference, so that at least one of the stretch films and the other stretch film have a height difference.

According to another aspect of the present invention, the present invention further provides a camera module, which includes:

a lens assembly, wherein the lens assembly includes an optical lens;

a photosensitive component, wherein the optical lens is held in the photosensitive path of the photosensitive component; and

A film iris diaphragm, wherein the film iris diaphragm is arranged outside the optical lens, wherein the film iris diaphragm includes at least two stretchable films and at least two driving electrodes and a variable-area progressive The light channel, wherein the outer side of the stretchable film far away from the optical lens among the two adjacent stretchable films is arranged on the inner side of the stretchable film close to the optical lens, and the outermost The inner side of the stretchable film defines the light entrance channel, and the driving electrodes are arranged on the outer side of the stretchable film, wherein when the driving electrodes apply excitation electrical signals to the stretchable film, the stretchable film driven to allow the film inner side of the stretch film to move towards or away from the optical axis of the camera module.

According to an embodiment of the present invention, the film iris diaphragm includes three stretch films and three drive electrodes, and each drive electrode is respectively arranged on the outside of each stretch film.

According to an embodiment of the present invention, the optical lens includes a lens barrel and a series of optical lenses arranged on the lens barrel, and the innermost stretchable film is attached to the end surface of the lens barrel.

According to an embodiment of the present invention, the lens assembly includes a lens carrier, the optical lens is disposed on the lens carrier, and the innermost stretch film is attached to the end surface of the lens barrel.

According to another aspect of the present invention, the present invention further provides a method for controlling the amount of light entering the camera module, wherein the method for controlling the amount of light entering includes the following steps:

(a) A light entrance channel with variable area is defined by the film inner sides of at least two stretch films;

(b) When positive excitation is applied to at least two of the stretch films, the inner sides of the films of at least two of the stretch films are allowed to move toward the direction of the optical axis of a camera module to stretch, so as to reduce the size of the light entrance channel area, so less light is allowed to reach a photosensitive chip through an optical lens of the camera module after passing through the light entrance channel; and

(c) When negative excitation is applied to at least two of the stretch films, allow the film inner sides of at least two of the stretch films to move and shrink in a direction away from the optical axis of the camera module, so as to enlarge the light entrance channel area, so more light is allowed to reach the photosensitive chip through the optical lens of the camera module after passing through the light entrance channel.

According to an embodiment of the present invention, when the number of the stretch films is two, two of the stretch films are arranged symmetrically.

According to an embodiment of the present invention, when the number of the stretch films is more than three, the optical axis of the camera module is taken as the axis of symmetry, and more than three of the stretch films are arranged symmetrically about the center.

According to an embodiment of the invention, at least one of said stretch films and the other of said stretch films have a height difference.

Description of drawings

FIG. 1 is a schematic perspective view of a camera module according to a preferred embodiment of the present invention.

2A and 2B are schematic cross-sectional views of the camera module in different directions after the top cover is removed according to the preferred embodiment of the present invention.

FIG. 3 is an exploded schematic diagram of the camera module according to the above-mentioned preferred embodiment of the present invention.

FIG. 4A and FIG. 4B illustrate the working process of a thin-film iris of the camera module according to the above-mentioned preferred embodiment of the present invention from a cross-sectional perspective and a top perspective respectively.

5A and 5B are schematic cross-sectional views in different directions after removing the top cover of a modified example of the camera module according to the above-mentioned preferred embodiment of the present invention.

FIG. 6 is an exploded schematic diagram of the above-mentioned modified example of the camera module according to the above-mentioned preferred embodiment of the present invention.

7A and 7B are schematic cross-sectional views in different directions after removing the top cover of another modified example of the camera module according to the above-mentioned preferred embodiment of the present invention.

FIG. 8A and FIG. 8B are schematic cross-sectional views in different directions after removing the top cover of another modified example of the camera module according to the above-mentioned preferred embodiment of the present invention.

FIG. 9 is a schematic cross-sectional view of another modified example of the camera module according to the above-mentioned preferred embodiment of the present invention, after removing the top cover.

FIG. 10 is an exploded schematic diagram of the above-mentioned modified example of the camera module according to the above-mentioned preferred embodiment of the present invention.

11 is a schematic cross-sectional view of a camera module after removing the top cover according to another preferred embodiment of the present invention.

FIG. 12 schematically illustrates the working process of a thin film iris of the camera module in the preferred embodiment of the present invention from a sectional perspective.

Detailed ways

Before describing in detail any embodiment of the invention, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of the components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use of "including", "including" or "having" and variations thereof herein is intended to cover the items listed below and their equivalents as well as additional items. Unless otherwise specified or limited, the terms "mount", "connect", "support" and "coupling" and variations thereof are used broadly and encompass both direct and indirect mounting, connecting, supporting and coupling. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings.

And, in the first aspect, in the disclosure of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical" , "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, Rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, the above terms cannot be construed as limiting the present invention; in the second aspect, the term "a" should be understood as "at least one "or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a logarithmic number limits.

Referring to accompanying drawings 1 to 4B of the accompanying drawings of the present invention, a camera module according to a preferred embodiment of the present invention will be disclosed and explained in the following description, wherein the camera module includes a A photosensitive component 10 , a lens component 20 and a film iris diaphragm 30 .

Specifically, the photosensitive component 10 includes a circuit board 11 and a photosensitive chip 12 , and the photosensitive chip 12 is connected to the circuit board 11 . Preferably, the photosensitive component 10 also includes a mirror base 13, the mirror base 13 is arranged on the circuit board 11, and the mirror base 13 surrounds the photosensitive chip 12, so that the photosensitive chip The photosensitive area 12 can correspond to a light channel 131 defined by the mirror base 13 , so that incident light can reach the photosensitive chip 12 after passing through the light channel 131 of the mirror base 13 .

It is worth mentioning that the way the photosensitive chip 12 is connected to the circuit board 11 is not limited. For example, in the specific example of the camera module shown in accompanying drawings 1 to 4B, after the back of the photosensitive chip 12 is attached to the front of the circuit board 11, it is connected by a connecting wire 14. The pads of the photosensitive chip 12 and the pads of the circuit board 11 are used to realize the connection between the photosensitive chip 12 and the circuit board 11 . Optionally, when the front side of the photosensitive chip 12 is mounted on the back side of the circuit board 11, the pads of the photosensitive chip 12 and the pads of the circuit board 11 can be directly welded to realize the The connection between the photosensitive chip 12 and the circuit board 11 , at this time, the photosensitive area of the photosensitive chip 12 corresponds to the reserved light hole of the circuit board 11 .

It is worth mentioning that the manner in which the mirror base 13 is disposed on the circuit board 11 is not limited. For example, in the specific example of the camera module shown in FIGS. 1 to 4B , the mirror base 13 is integrally combined with the circuit board 11 and the photosensitive chip 12 during the molding process. A part of the photosensitive area, and the mirror base 13 forms the light channel 131 during molding, so as to allow the photosensitive area of the photosensitive chip 12 to correspond to the light channel 131 . Optionally, the mirror base 13 is only integrally combined with the circuit board 11 during the molding process, and at the same time forms the light channel 131, wherein the photosensitive chip 12 is allowed to pass through the The light channel 131 is mounted on the circuit board 11 . Optionally, the mirror base 13 is a prefabricated part, after the photosensitive chip 12 is mounted on the circuit board 11, the mirror base 13 is pasted on the circuit board 11 by an adhesive such as glue, And the photosensitive area of the photosensitive chip 12 corresponds to the light channel 131 of the mirror base 13 .

In addition, continuing to refer to accompanying drawings 1 to 4B, the photosensitive assembly 10 includes at least one electronic component 15, which may be but not limited to a resistor, capacitor, processor, driver, etc., wherein the electronic component 15 is mounted on the circuit board 11 , and the electronic components 15 can be embedded by the mirror holder 13 .

In addition, continuing to refer to accompanying drawings 1 to 4B, the photosensitive assembly 10 includes a filter holder 16 and a filter 17 mounted on the filter holder 16, the filter 17 may be But not limited to infrared cut filters. The filter holder 16 is mounted on the inner side of the top surface of the mirror base 13, and the filter 17 is kept on the photosensitive path of the photosensitive chip 12, so that the incident light is filtered by the filter After being filtered by the sheet 17 , it can reach the photosensitive chip 12 through the light channel 131 of the mirror base 13 . Optionally, the photosensitive assembly 10 may not be provided with the filter holder 16 , but the filter 17 may be directly attached to the mirror holder 13 .

Continuing to refer to accompanying drawings 1 to 4B, the lens assembly 20 includes an optical lens 21, wherein the optical lens 21 is held on the photosensitive path of the photosensitive chip 12 of the photosensitive assembly 10, so that the incident light is The optical lens 21 can sequentially pass through the optical filter 17 and the light channel 131 of the mirror base 13 to reach the photosensitive chip 12 after converging.

Further, the lens assembly 20 includes a lens carrier 22, the optical lens 21 is arranged on the lens carrier 22, and the lens carrier 22 is arranged on the top surface of the mirror seat 13 of the photosensitive assembly 10 , thus maintaining the photosensitive path of the optical lens 21 on the photosensitive chip 12 . For example, the lens carrier 22 can be pasted on the outside of the top surface of the mirror base 13 by an adhesive such as glue. It can be understood that, in the embodiment where the photosensitive component 10 of the camera module is not configured with the lens holder 13 , the lens carrier 22 can be directly bonded to the circuit board 11 .

It is worth mentioning that the type of the lens carrier 22 is not limited. For example, in some feasible examples, the lens carrier 22 is a lens holder. After the camera module is assembled, the relative position of the optical lens 21 and the photosensitive chip 12 remains unchanged so that the camera The module forms a fixed-focus camera module. In other feasible examples, the lens carrier 22 includes a driving motor, such as a voice coil motor and an anti-shake motor. After the camera module is assembled, the relative position of the optical lens 21 and the photosensitive chip 12 It can be adjusted so that the camera module forms a dynamic focus camera module or an anti-shake camera module.

Referring to accompanying drawings 1 to 4B, the film iris 30 is arranged on the outside of the optical lens 21 for controlling the amount of incoming light of the camera module, thereby adjusting the image captured by the camera module The brightness and depth of field.

Specifically, the film iris 30 includes at least two stretch films 31 and at least two drive electrodes 32, and the film iris 30 forms a variable-area progressive gap between at least two stretch films 31. Light channel 33. More specifically, each of the stretch films 31 has a film outer side 3101 and a film inner side 3102 corresponding to the film outer side 3101, and at least two of the stretch films 31 are arranged around the optical axis of the camera module. , so that the light entrance channel 33 is defined by the film inner sides 3102 of at least two stretch films 31 . Each of the drive electrodes 32 is respectively arranged on the film outer side 3101 of each of the stretch film 31, and the drive electrodes 32 are configured to drive the film inner side 3102 of the stretch film 31 toward or away from. The direction of the optical axis of the camera module moves, so that the area of the light entrance channel 33 defined by the film inner side 3102 of at least two stretch films 31 is variable, thereby controlling the amount of light entering the camera module .

For example, the stretchable film 31 may be a piezoelectric film, and when the drive electrode 32 applies an excitation electric signal to the stretchable film 31, the stretchable film 31 can be deformed and stretched in the horizontal direction, so that the stretchable The film inner side 3102 of the film 31 can move toward or away from the optical axis of the camera module, so that the area of the light entrance channel 33 can be changed to control the amount of light entering the camera module. Specifically, when the drive electrode 32 applies positive excitation to the stretch film 31, the film inner side 3102 of the stretch film 31 moves toward the direction close to the optical axis of the camera module to make the stretch film 31 The thin film 31 is stretched to reduce the area of the light entrance channel 33 of the thin film iris 30 , thereby reducing the light entrance amount of the camera module. Correspondingly, when the drive electrode 32 applies negative excitation to the stretch film 31, the film inner side 3102 of the stretch film 31 moves in a direction away from the optical axis of the camera module to make the stretch The thin film 31 shrinks to enlarge the area of the light entrance channel 33 of the thin film iris 30 , thereby increasing the light entrance amount of the camera module.

In the camera module of the present invention, on the one hand, the stretch film 31 of the film iris 30 is made of an opaque film material, so the film iris 30 is in the The height direction of the camera module takes up almost no space, so that the thin film iris 30 can reduce the height of the camera module due to its thinner size. On the other hand, the working mode of the film iris 30 is that the drive electrode 32 drives the stretch film 31 by applying an excitation electrical signal for positive excitation or negative excitation to the stretch film 31. The inner side 3102 of the film is stretchable to adjust the area of the light entrance channel 33 defined by at least two stretchable films 31 to control the amount of light entering the camera module, so that the film iris 30 does not work The height space of the camera module needs to be occupied. In this way, the camera module does not need to reserve a working space for the film iris 30 during design, which is beneficial to reduce the height dimension of the camera module. Therefore, by designing the film iris 30, on the basis of being able to adjust the brightness and depth of field of the image captured by the camera module by controlling the amount of light entering the camera module, the camera module The height dimension can be significantly reduced to meet the needs of thinner and lighter electronic equipment.

Preferably, at least two stretchable films 31 are symmetrically arranged with the optical axis of the camera module as the axis of symmetry, so that the optical axis of the camera module can always pass through the film iris 30 The central position of the light inlet channel 33, so that at the same annular position of the camera module, the amount of light entering the camera module can be kept consistent, that is, the light entering the camera module can be evenly The distribution is beneficial to reduce the image distortion of the camera module, so as to ensure the imaging quality of the camera module.

Continuing to refer to accompanying drawing 1 to Fig. 4B, described film iris diaphragm 30 comprises four described stretch films 31, along the clockwise direction, four described stretch films 31 are defined as a first film 311, a The second film 312, a third film 313 and a fourth film 314, the first film 311, the second film 312, the third film 313 and the fourth film 314 use the camera module The optical axis of the symmetry axis is centrally symmetrically arranged, so that the positions of the first film 311 and the third film 313 are opposite and located on an opposite side of the optical axis of the camera module, and the second film 312 is opposite to the fourth film 314 and is located on the opposite side of the optical axis of the camera module. The film inner side 3102 of the first film 311, the film inner side 3102 of the second film 312, the film inner side 3102 of the third film 313 and the film inner side of the fourth film 314 3102 defines the light entrance channel 33 of the film iris 30 .

Correspondingly, the film iris 30 includes four driving electrodes 32, and along the clockwise direction, the four driving electrodes 32 are sequentially defined as a first electrode 321, a second electrode 322, a The third electrode 323 and a fourth electrode 324 . The first electrode 321 is disposed on the film outer side 3101 of the first film 311 for driving the film inner side 3102 of the first film 311 toward or away from the optical axis of the camera module direction movement. The second electrode 322 is disposed on the film outer side 3101 of the second film 312 for driving the film inner side 3102 of the second film 312 toward or away from the optical axis of the camera module direction movement. The third electrode 323 is disposed on the outer side 3101 of the third film 313 for driving the inner side 3101 of the third film 313 toward or away from the optical axis of the camera module direction movement. The fourth electrode 324 is disposed on the film outer side 3101 of the fourth film 314 for driving the film inner side 3102 of the fourth film 314 toward or away from the optical axis of the camera module direction movement.

Preferably, the first film 311, the second film 312, the third film 313 and the fourth film 314 are rectangular films with the same piezoelectric coefficient and size, and at the initial position, on the one hand, the The edges of the film inner side 3102 of the first film 311 are respectively perpendicular to the edges of the film inner side 3102 of the second film 312 and the edges of the film inner side 3102 of the fourth film 314, the first The edge of the film inner side 3102 of the film 311 is parallel to the edge of the film inner side 3102 of the third film 313, on the other hand, the film inner side 3102 of the first film 311, the second film 312 The distance between the inner side 3102 of the film, the inner side 3102 of the third film 313 and the inner side 3102 of the fourth film 314 and the optical axis of the camera module is the same, as described The membrane inner side 3102 of the first membrane 311, the membrane inner side 3102 of the second membrane 312, the membrane inner side 3102 of the third membrane 313 and the membrane inner side 3102 of the fourth membrane 314 define A substantially square light entrance channel. When the first electrode 321 , the second electrode 322 , the third electrode 323 and the fourth electrode 324 are connected to the first film 311 , the second film 312 , and the third film 313 respectively When the same excitation electric signal is applied to the fourth film 314, the first film 311, the second film 312, the third film 313 and the fourth film 314 can produce the same deformation to adjust the The area of the light entrance channel 33 of the film iris diaphragm 30 and ensure that the optical axis of the camera module always passes through the center position of the light entrance channel 33 of the film iris diaphragm 30 .

Optionally, the first film 311, the second film 312, the third film 313 and the fourth film 314 are semi-circular films with the same piezoelectric coefficient and size, so that the first film The membrane inner side 3102 of 311, the membrane inner side 3102 of the second membrane 312, the membrane inner side 3102 of the third membrane 313 and the membrane inner side 3102 of the fourth membrane 314 define a substantially circle Shaped said light entrance channel 33.

It is worth mentioning that, in other examples of the camera module of the present invention, the film iris 30 may include three stretch films 31, wherein the films of the stretch films 31 The inner side 3102 can define a substantially triangular light entrance channel 33 . Or in other examples of the camera module of the present invention, the film iris diaphragm 30 may include five stretch films 31, wherein the film inner side 3102 of these stretch films 31 can define a The light entrance channel 33 is substantially pentagonal.

In the specific example of the camera module shown in FIGS. 1 to 4B , the first film 311 , the second film 312 , and the third film 313 of the film iris 30 and the fourth thin film 314 are disposed on the end surface of the optical lens 21 , so as to arrange the thin film iris 30 outside the optical lens 21 .

Specifically, the optical lens 21 includes a lens barrel 211 and a series of optical lenses 212 arranged sequentially along the height direction of the lens barrel 211, wherein the end surface of the lens barrel 211 of the optical lens 21 has two A first mounting surface 2111 and two second mounting surfaces 2112, the two first mounting surfaces 2111 are opposite to each other and located on an opposite side of the optical axis of the camera module, and the two second mounting surfaces 2111 are located on opposite sides of the optical axis of the camera module. The two mounting surfaces 2112 are opposite to each other and located on the opposite side of the optical axis of the camera module, and the two first mounting surfaces 2111 and the two second mounting surfaces 2112 have a height difference, The end surface of the lens barrel 211 is stepped.

For ease of description and understanding, in the specific example of the camera module shown in Figs. Take the height position of the second mounting surface 2112 as an example. It can be understood that, in other examples of the camera module of the present invention, the height positions of the two first mounting surfaces 2111 of the lens barrel 211 may be higher than the two second mounting surfaces The height position of 2112.

The first film 311 and the third film 313 of the film iris 30 are mounted on the two first mounting surfaces 2111 of the lens barrel 211 of the optical lens 21 respectively, Correspondingly, the second film 312 and the fourth film 314 are mounted on the two second mounting surfaces 2112 of the lens barrel 211 respectively, so that the first film 311 and the third film The membrane 313 is at a lower position, while the second membrane 312 and the fourth membrane 314 are at a higher position. Through the above arrangement, when the first electrode 321, the second electrode 322, the third electrode 323, and the fourth electrode 324 are respectively connected to the first film 311, the second film 312, the When the third film 313 and the fourth film 314 apply an excitation electric signal, the movements of the first film 311, the second film 312, the third film 313 and the fourth film 314 do not interfere with each other , so as to ensure the reliability of the film iris 30 in operation.

It can be understood that the height difference between the first mounting surface 2111 and the second mounting surface 2112 of the lens barrel 211 depends on the thickness of the stretch film 31 . Specifically, the height difference between the first mounting surface 2111 and the second mounting surface 2112 of the lens barrel 211 is slightly larger than the thickness of the stretch film 31, so that the first mounting surface 2111 and the second mounting surface 2112 can be ensured The motions of the film 311, the second film 312, the third film 313 and the fourth film 314 do not interfere with each other, and can avoid the movement of the first film 311, the second film 312, the first film The overlapping positions of the third thin film 313 and the fourth thin film 314 form a larger gap to leak light.

It is worth mentioning that, the manner in which the stretch film 31 is attached to the end surface of the lens barrel 211 of the optical lens 21 is not limited. For example, the first film 311 and the third film 313 can be attached to the first mounting surface 2111 of the lens barrel 211 by glue, and the second film 312 and the fourth film 314 It can be mounted on the second mounting surface 2112 of the lens barrel 211 by glue.

Continuing to refer to accompanying drawings 1 to 3, the camera module further includes a top cover 40 having a light inlet 41, wherein the top cover 40 is covered by the film iris 30 and the outside of the lens assembly 20, and the light entrance hole 41 of the top cover 40 corresponds to the light entrance channel 33 of the film iris 30, so that the top cover 40 participates in forming the The appearance of the above-mentioned camera module and the protection of the film iris 30.

Continuing to refer to FIG. 4A, when the first electrode 321, the second electrode 322, the third electrode 323 and the fourth electrode 324 are applied to the first film 311, the second film 312, When the third film 313 and the fourth film 314 are positively excited, the film inner side 3102 of the first film 311, the film inner side 3102 of the second film 312, the third film The inner side 3102 of the film 313 and the inner side 3102 of the fourth film 314 respectively move toward the direction close to the optical axis of the camera module to allow the four stretchable films 31 to stretch, so as to adjust the The film inside 3102 of the first film 311, the film inside 3102 of the second film 312, the film inside 3102 of the third film 313, and the film inside 3102 of the fourth film 314 The defined area of the light entrance channel 33 reduces the amount of light entering the camera module. At this time, the camera module has a smaller aperture and a larger depth of field. In this state, the camera module can capture an image with a blurred background.

Continuing to refer to FIG. 4B, when the first electrode 321, the second electrode 322, the third electrode 323 and the fourth electrode 324 are respectively directed to the first film 311, the second film 312, When negative excitation is applied to the third film 313 and the fourth film 314, the film inner side 3102 of the first film 311, the film inner side 3102 of the second film 312, the third film The film inner side 3102 of 313 and the film inner side 3102 of the fourth film 314 respectively move towards the direction away from the optical axis of the camera module to allow the four stretch films 31 to shrink, so as to adjust the The film inside 3102 of the first film 311, the film inside 3102 of the second film 312, the film inside 3102 of the third film 313, and the film inside 3102 of the fourth film 314 The defined area of the light inlet channel 33 increases the amount of light entering the camera module. At this time, the camera module has a larger aperture and a smaller depth of field. In this state, the camera module can capture images with a clear background.

Accompanying drawings 5A to 6 show a modified example of the camera module of the above-mentioned preferred embodiment, and the difference from the camera module shown in Fig. 1 to Fig. 4B is that in Fig. 5A to Fig. In the specific example of the camera module shown in 6, the first film 311, the second film 312, the third film 313 and the fourth film of the film iris 30 314 are provided on the lens carriers 22 respectively.

Specifically, the end surface of the lens carrier 22 has two first mounting surfaces 2111 and two second mounting surfaces 2112, and the two first mounting surfaces 2111 are opposite to each other and located on the side of the camera module. On one opposite side of the optical axis, the positions of the two second mounting surfaces 2112 are opposite and located on the other opposite side of the optical axis of the camera module, and the two first mounting surfaces 2111 and the two The second mounting surface 2112 has a height difference, so that the end surface of the lens carrier 22 is stepped.

The first film 311 and the third film 313 of the film iris 30 are mounted on the two first mounting surfaces 2111 of the lens carrier 22 respectively, and correspondingly, the first The second film 312 and the fourth film 314 are respectively arranged on the two second mounting surfaces 2112 of the lens carrier 22, so that the first film 311 and the third film 313 are at a lower position, And the second film 312 and the fourth film 314 are at a higher position. Through the above arrangement, when the first electrode 321, the second electrode 322, the third electrode 323, and the fourth electrode 324 are respectively connected to the first film 311, the second film 312, the When the third film 313 and the fourth film 314 apply an excitation electric signal, the movements of the first film 311, the second film 312, the third film 313 and the fourth film 314 do not interfere with each other , so as to ensure the reliability of the film iris 30 in operation.

It can be understood that the height difference between the first mounting surface 2111 and the second mounting surface 2112 of the lens carrier 22 depends on the thickness of the stretch film 31 . Specifically, the height difference between the first mounting surface 2111 and the second mounting surface 2112 of the lens carrier 22 is slightly larger than the thickness of the stretch film 31, so that the first mounting surface 2111 and the second mounting surface 2112 can be ensured. The motions of the film 311, the second film 312, the third film 313 and the fourth film 314 do not interfere with each other, and can avoid the movement of the first film 311, the second film 312, the first film The overlapping positions of the third thin film 313 and the fourth thin film 314 form a larger gap to leak light.

Accompanying drawing 7A and Fig. 7B have shown a modified example of the described camera module of above-mentioned preferred embodiment, and the described camera module shown in Fig. 5A to Fig. 6 is different, in Fig. 7A and 7B In the specific example of the camera module shown, the middle of the lens carrier 22 has two bosses 221, which are positioned higher than the end surface of the optical lens 21 and protrude toward the optical axis of the camera module. Direction, wherein the two first mounting surfaces 2111 of the lens carrier 22 are formed on the two bosses 221, and the two second mounting surfaces 2112 are formed on the end surface of the lens carrier 22, so The two first mounting surfaces 2111 and the two second mounting surfaces 2112 have a height difference, so that the first film 311, the second film 312, the third film 313 and the The movement of the fourth film 314 does not interfere with each other, thereby ensuring the reliability of the film iris 30 in operation.

Accompanying drawing 8A and Fig. 8B have shown a modified example of the described camera module of above-mentioned preferred embodiment, and the described camera module shown in Fig. 1 to Fig. 4B is different, in Fig. 8A and Fig. In the specific example of the camera module shown in 8B, the end surface of the lens barrel 211 of the optical lens 21 and the end surface of the lens carrier 22 have a height difference, and the thin film variable steel ring 30 has a height difference. The first film 311 and the third film 313 are arranged on the end surface of the lens barrel 211 of the optical lens 21, and the second film 312 and the fourth film 314 are arranged on the lens carrier 22 end face. In other words, the end surface of the lens barrel 211 of the optical lens 21 forms two first mounting surfaces 2111 , and the end surface of the lens carrier 22 forms two second mounting surfaces 2112 . When the first electrode 321 , the second electrode 322 , the third electrode 323 and the fourth electrode 324 are connected to the first film 311 , the second film 312 , and the third film 313 respectively When an excitation electric signal is applied to the fourth film 314, the movements of the first film 311, the second film 312, the third film 313 and the fourth film 314 do not interfere with each other, thereby ensuring that the The reliability of the film iris 30 in operation.

Accompanying drawing 9 and Fig. 10 have shown a modified example of the described camera module of above-mentioned preferred embodiment, and the described camera module shown in Fig. 1 to Fig. 4B is different, in accompanying drawing 9 and Fig. In the specific example of the camera module shown in 10, the film iris 30 includes two semicircular stretch films 31, which are respectively defined as a left film 315 and a right film 316, the left side film 315 and the right side film 316 are arranged symmetrically, so as to allow the left side film 315 and the right side film 316 to be connected end to end and the film on the left side 315 A substantially circular light entrance channel 33 is formed between the inner side 3102 and the inner side 3102 of the right side film 316 .

Correspondingly, the film iris 30 includes two driving electrodes 32, which are respectively defined as a left electrode 325 and a right electrode 326, and the left electrode 325 is arranged on the left The outer side 3101 of the film 315 is used to drive the inner side 3102 of the left side film 315 to move toward or away from the optical axis of the camera module. The right side electrode 326 is disposed on the outer side 3101 of the right side film 316 for driving the inner side 3102 of the right side film 316 toward or away from the optical axis of the camera module direction movement.

Preferably, the left side film 315 and the right side film 316 are semi-circular films with the same piezoelectric coefficient and size, and in the initial position, the left side film 315 and the right side film 316 are relatively opposite to the The optical axis of the camera module is symmetrical, so that when the left electrode 325 and the right electrode 326 respectively apply the same excitation electrical signal to the left film 315 and the right film 316, the left The film 315 and the right film 316 can produce the same deformation to adjust the area of the light entrance channel 33 of the film iris 30, and ensure that the optical axis of the camera module always passes through the film The central position of the light entrance channel 33 of the iris 30 .

It is worth mentioning that, in other examples of the camera module of the present invention, the number of the stretch films 31 of the film iris 30 may be more than three, for example, the number of stretch films 31 It can be 3, 4, 5 or more. Correspondingly, the number of the driving electrodes 32 of the film iris 30 can be more than 3, for example, the number of the driving electrodes 32 can be 3, 4, 5 or more.

In the specific example of the camera module shown in accompanying drawings 9 and 10, the left film 315 and the right film 316 of the film iris 30 are respectively arranged on the optical The end surface of the lens 21 is used to arrange the film iris 30 outside the optical lens 21 .

Specifically, the lens barrel 211 of the optical lens 21 has a left mounting surface 2113 and a right mounting surface 2114, and the left mounting surface 2113 and the right mounting surface 2114 correspond to each other And both have height difference. For the convenience of description and understanding, in the specific example of the camera module shown in Fig. 11 and Fig. 12, the height position of the mounting surface 2113 on the left side of the lens barrel 211 is higher than that on the right side. The height position of the side mounting surface 2114 is taken as an example. It can be understood that, in other examples of the camera module of the present invention, the height position of the left mounting surface 2113 of the lens barrel 211 may be lower than the height position of the right mounting surface 2114 .

The left film 315 is mounted on the left mounting surface 2113 of the lens barrel 211 , and the right film 316 is mounted on the right mounting surface of the lens barrel 211 accordingly. surface 2114, so that the left side film 315 is at a higher position, and the right side film 316 is at a lower position, when the left side electrode 325 and the right side electrode 326 are facing the left side film 315 and the When the right film 316 is applied with an excitation signal, the movements of the left film 315 and the right film 316 do not interfere with each other, thereby ensuring the reliability of the film iris 30 in operation.

It can be understood that the height difference between the left mounting surface 2113 and the right mounting surface 2114 of the lens barrel 211 depends on the thickness of the stretch film 31 . Specifically, the height difference between the left mounting surface 2113 and the right mounting surface 2114 of the lens barrel 211 is slightly greater than the thickness of the stretch film 31, so that the left side can be guaranteed The movement of the film 315 and the right film 316 does not interfere with each other, and can avoid forming a large gap at the overlapping position of the left film 315 and the right film 316 to cause light leakage.

Continuing to refer to accompanying drawings 9 and 10, when the left electrode 325 and the right electrode 326 respectively apply positive excitation to the left film 315 and the right film 316, the left film 315 The inner side 3102 of the film and the inner side 3102 of the right side film 316 respectively move towards or away from the optical axis of the camera module to adjust the inner side of the film 315 from the left side 3102 and the film inner side 3102 of the right side film 316 define the area of the light entrance channel 33, thereby reducing the amount of light entering the camera module. At this time, the camera module has a smaller aperture and a larger depth of field. In this state, the camera module can capture an image with a blurred background.

Correspondingly, when the left electrode 325 and the right electrode 326 respectively apply negative excitation to the left film 315 and the right film 316, the film inner side 3102 of the left film 315 and the film inner side 3102 of the right side film 316 respectively move towards or away from the optical axis direction of the camera module, so as to enlarge the film inner side 3102 of the left side film 315 and the right side The inner side 3102 of the film 316 defines the area of the light entrance channel 33 , thereby increasing the amount of light entering the camera module. At this time, the camera module has a larger aperture and a smaller depth of field. In this state, the camera module can capture images with a clear background.

According to another aspect of the present invention, the present invention further provides a method for controlling the amount of light entering the camera module, wherein the method for controlling the amount of light entering includes the following steps:

(a) a light entrance channel 33 with a variable area is defined by the film inner sides 3102 of at least two stretch films 31;

(b) When positive excitation is applied to at least two of the stretch films 31, the film inner sides 3102 of at least two of the stretch films 31 are allowed to move toward the direction close to the optical axis of the camera module, so as to adjust the The area of the light entrance channel 33, so less light is allowed to reach the photosensitive chip 12 through the optical lens 21 of the camera module after passing through the light entrance channel 33; and

(c) When negative excitation is applied to at least two of the stretch films 31, the film inner sides 3102 of at least two of the stretch films 31 are allowed to move and shrink in a direction away from the optical axis of the camera module, so as to adjust the The area of the light entrance channel 33 is such that more light is allowed to reach the photosensitive chip 12 through the optical lens 21 of the camera module after passing through the light entrance channel 33 .

Through the above method, on the one hand, the stretch film 31 of the film iris 30 is made of an opaque film material, so the film iris 30 is at the height of the camera module. The direction hardly takes up space, so that the thin film iris 30 can reduce the height of the camera module due to its thinner size; on the other hand, the working method of the thin film iris 30 The drive electrode 32 drives the inner side 3102 of the stretch film 31 to expand and contract by applying a positive or negative excitation electrical signal to the stretch film 31, so as to adjust The area of the light entrance channel 33 defined by 31 controls the amount of light entering the camera module, so that the film iris 30 does not need to occupy the height space of the camera module when it is working, so that the The camera module does not need to reserve a working space for the film iris 30 during design, which is beneficial to reduce the height of the camera module. Therefore, by designing the film iris 30, on the basis of being able to adjust the brightness and depth of field of the image captured by the camera module by controlling the amount of light entering the camera module, the camera module The height dimension can be significantly reduced to meet the needs of thinner and lighter electronic equipment.

Preferably, when the number of the stretch film 31 is two, two of the stretch films 31 are arranged symmetrically; when the number of the stretch film 31 is more than three, the optical axis of the camera module As the axis of symmetry, more than three stretchable films 31 are arranged symmetrically in the center; through the above-mentioned method, the light entering the camera module can be evenly distributed to help reduce the image of the camera module distortion, thereby ensuring the imaging quality of the camera module.

Preferably, at least one of the stretch films 31 and the other stretch films 31 of the film iris 30 have a height difference, so that when the driving electrodes 32 apply an excitation electrical signal to the stretch films 31, The movements of at least two stretchable films 31 of the film iris 30 do not interfere with each other, thereby ensuring the reliability of the film iris 30 in operation.

Referring to accompanying drawings 11 and 12 of the accompanying drawings of the present invention, a camera module according to another preferred embodiment of the present invention will be disclosed and explained in the following description, and accompanying drawings 1 to 4B The difference between the shown camera modules is the specific structure of the film iris 30 .

Specifically, the film iris 30 includes at least two stretchable films 31 and at least two driving electrodes 32 , and the film iris 30 has a light entrance channel 33 with a variable area. The stretch film 31 has a film outside 3101 and a film inside 3102 corresponding to the film outside 3101, wherein the stretch film 31 of the two adjacent stretch films 31 far away from the optical lens 21 The film outer side 3101 is arranged on the film inner side 3102 of one of the stretch films 31 close to the optical lens 21, and the outermost stretch film 31 defines the light entrance channel 33, wherein the driving electrodes 32 is arranged on the film outer side 3101 of the stretch film 31, so that when the drive electrode 32 applies an excitation electric signal to the stretch film 31, the stretch film 31 is driven to allow the stretch film 31 The inner side of the film 3102 moves toward or away from the optical axis of the camera module to change the area of the light entrance channel 33 defined by the outermost stretch film 31, thereby controlling the camera module the amount of incoming light.

For example, the stretch film 31 may be a piezoelectric annular film to allow the stretch film 31 to define the light entrance channel 33, and when the drive electrode 32 applies an excitation electrical signal to the stretch film 31, the The stretch film 31 can be deformed and stretched in the horizontal direction, so that the film inner side 3102 of the stretch film 31 can move toward or away from the optical axis of the camera module, so that the light entrance channel The area of 33 is variable to control the amount of light entering the camera module. Specifically, when the drive electrode 32 applies positive excitation to the stretch film 31, the film inner side 3102 of the stretch film 31 moves toward the direction close to the optical axis of the camera module to make the stretch film 31 The thin film 31 is stretched to reduce the area of the light entrance channel 33 of the thin film iris 30 , thereby reducing the light entrance amount of the camera module. Correspondingly, when the driving electrode 32 moves in a direction away from the optical axis of the camera module, the stretchable film 31 is contracted to enlarge the light entrance channel 33 of the film iris 30 area, thereby increasing the amount of light entering the camera module.

In the camera module of the present invention, on the one hand, the stretch film 31 of the film iris 30 is made of an opaque film material, so the film iris 30 is in the The height direction of the camera module takes up almost no space, so that the thin film iris 30 can reduce the height of the camera module due to its thinner size. On the other hand, the working mode of the film iris 30 is that the drive electrode 32 drives the stretch film 31 by applying an excitation electrical signal for positive excitation or negative excitation to the stretch film 31. The inner side 3102 of the film is stretched to adjust the area of the light entrance channel 33 defined by the stretch film 31 to control the amount of light entering the camera module, so that the film iris 30 does not need to occupy The height space of the camera module, in this way, the camera module does not need to reserve a working space for the film iris 30 during design, which is conducive to reducing the height dimension of the camera module. Therefore, by designing the film iris 30, on the basis of being able to adjust the brightness and depth of field of the image captured by the camera module by controlling the amount of light entering the camera module, the camera module The height dimension can be significantly reduced to meet the needs of thinner and lighter electronic equipment.

Continuing to refer to accompanying drawings 11 and 12, the film iris 30 includes three said stretch films 31 and three said drive electrodes 32, along the height direction, three said stretch films 31 are defined in turn as A bottom side film 317, a middle part film 318 and a top side film 319, said bottom side film 317, said middle part film 318 and said top side film 319 are all annular, and are bounded by said top side film 319 The light entering channel 33 , the three driving electrodes 32 are sequentially defined as a bottom electrode 327 , a middle electrode 328 and a top electrode 329 .

It is worth mentioning that, in other examples of the camera module of the present invention, the film iris 30 may include two stretchable films 31 and two drive electrodes 32, or the film The iris 30 may include more than four stretch films 31 and more than four driving electrodes 32 .

The bottom side electrode 327 is disposed on the film outer side 3101 of the bottom side film 317 for driving the film inner side 3102 of the bottom side film 317 toward or away from the optical axis of the camera module direction of movement. The middle electrode 328 is arranged on the film outer side 3101 of the middle film 318 for driving the film inner side 3102 of the middle film 318 to move towards or away from the optical axis of the camera module , and the film outer side 3101 of the middle film 318 is disposed on the film inner side 3102 of the bottom side film 317 . The top-side electrode 329 is disposed on the film outer side 3101 of the top-side film 319 for driving the film inner side 3102 of the top-side film 319 toward or away from the optical axis of the camera module and the film outer side 3101 of the top side film 319 is arranged on the film inner side 3102 of the middle film 318 .

Referring to accompanying drawing 12, when described bottom side electrode 327, described middle electrode 328 and described top side electrode 329 respectively apply positive excitation to described bottom side film 317, described middle part film 318 and described top side film 319 , the film inner side 3102 of the bottom side film 317, the film inner side 3102 of the middle film 318, and the film inner side 3102 of the top side film 319 respectively face the optical axis close to the camera module The direction of movement allows the four stretch films 31 to stretch, so as to reduce the area of the light entrance channel 33 defined by the film inner side 3102 of the top side film 319, thereby reducing the progress of the camera module. amount of light. At this time, the camera module has a smaller aperture and a larger depth of field. In this state, the camera module can capture an image with a blurred background.

Referring to accompanying drawing 12, when described bottom side electrode 327, described middle electrode 328 and described top side electrode 329 apply negative excitation to described bottom side film 317, described middle part film 318 and described top side film 319 respectively , the film inner side 3102 of the bottom side film 317, the film inner side 3102 of the middle film 318, and the film inner side 3102 of the top side film 319 respectively face away from the optical axis of the camera module. The direction of movement allows the four stretch films 31 to stretch, so as to increase the area of the light entrance channel 33 defined by the film inner side 3102 of the top side film 319, thereby increasing the progress of the camera module. amount of light. At this time, the camera module has a larger aperture and a smaller depth of field. In this state, the camera module can capture images with a clear background.

Continuing to refer to accompanying drawings 11 and 12, in this specific example of the camera module of the present invention, the bottom side film 317 of the film iris 30 is arranged on the end surface of the optical lens 21, To allow the film iris 30 to be held outside the optical lens 21 . Optionally, in other examples of the camera module of the present invention, the bottom side film 317 of the film iris 30 is arranged on the end surface of the lens carrier 22 to allow the film to be A diaphragm 30 is held outside the optical lens 21 .

It should be understood by those skilled in the art that the embodiments of the present invention shown in the foregoing description and drawings are only examples and do not limit the present invention. The objects of the present invention have been fully and effectively accomplished. The functions and structural principles of the present invention have been shown and described in the embodiments, and the embodiments of the present invention may have any deformation or modification without departing from the principles.

Claims (20)

1. A camera module, its characterized in that includes:

a lens assembly, wherein the lens assembly comprises an optical lens;

a photosensitive assembly, wherein the optical lens is held in a photosensitive path of the photosensitive assembly; and

The film iris diaphragm is arranged on the outer side of the optical lens, the film iris diaphragm further comprises at least two telescopic films, at least two driving electrodes and an optical inlet channel with a variable area, the at least two telescopic films are arranged around the optical axis of the camera module so as to define the optical inlet channel by the inner sides of the at least two telescopic films, the driving electrodes are arranged on the outer sides of the films of the telescopic films, and when the driving electrodes apply an excitation electric signal to the telescopic films, the telescopic films are driven to allow the inner sides of the films of the telescopic films to move towards a direction approaching or separating from the optical axis of the camera module.

2. The camera module of claim 1, wherein the thin film iris comprises two of the telescoping thin films and two of the drive electrodes, each of the drive electrodes being disposed outside of a thin film of each of the telescoping thin films, respectively.

3. The camera module of claim 1, wherein the thin film iris comprises four of the telescoping thin films and four of the drive electrodes, each of the drive electrodes being disposed outside of a thin film of each of the telescoping thin films, respectively.

4. A camera module according to claim 3, wherein the film inner side of each of said flexible films is curved to allow the film inner sides of two of said flexible films to define a generally circular light entry channel.

5. The camera module of claim 4, wherein each of the telescoping membranes is a semi-circular membrane, respectively.

6. The camera module of claim 2, wherein two of the telescoping films are symmetrically disposed.

7. A camera module according to claim 3, wherein the four flexible films are centered on the optical axis of the camera module.

8. The camera module of claim 7, wherein each of the telescoping membranes is a semicircular membrane, respectively, or each of the telescoping membranes is a rectangular membrane, respectively.

9. The camera module of any of claims 1 to 8, wherein at least one of the telescoping films and the other telescoping film have a height difference.

10. The camera module of claim 9, wherein the optical lens comprises a barrel and a series of optical lenses disposed on the barrel, wherein an end surface of the barrel has at least two mounting surfaces for mounting at least two of the telescoping films, wherein at least one of the mounting surfaces and the other mounting surface of the barrel have a height difference such that at least one of the telescoping films and the other telescoping film have a height difference.

11. The camera module of claim 9, wherein the lens assembly comprises a lens carrier, the optical lens being disposed on the lens carrier, wherein an end surface of the lens carrier has at least two mounting surfaces for mounting at least two of the pellicle, wherein at least one of the mounting surfaces and the other mounting surface of the lens barrel have a height difference such that at least one of the pellicle and the other pellicle have a height difference.

12. The camera module of claim 9, wherein the lens assembly comprises a lens carrier, the optical lens is disposed on the lens carrier, and the optical lens comprises a lens barrel and a series of optical lenses disposed on the lens barrel, wherein an end surface of the lens carrier and an end surface of the lens barrel respectively form at least one mounting surface for mounting at least two of the pellicle, wherein the mounting surface of the lens carrier and the mounting surface of the lens barrel have a height difference such that at least one of the pellicle and the other pellicle have a height difference.

13. A camera module, its characterized in that includes:

A lens assembly, wherein the lens assembly comprises an optical lens;

a photosensitive assembly, wherein the optical lens is held in a photosensitive path of the photosensitive assembly; and

a thin film iris, wherein the thin film iris is disposed outside the optical lens, wherein the thin film iris includes at least two telescopic thin films and at least two driving electrodes, and an area-variable light-entering channel, wherein a thin film outside of one of the adjacent two telescopic thin films, which is far from the optical lens, is disposed inside a thin film near the one of the telescopic thin films of the optical lens, and a thin film inside of the outermost telescopic thin film defines the light-entering channel, the driving electrodes are disposed outside the thin film of the telescopic thin film, wherein the telescopic thin film is driven to allow the thin film inside of the telescopic thin film to move toward a direction near or far from an optical axis of the image pickup module when the driving electrodes apply an excitation electric signal to the telescopic thin film.

14. The camera module of claim 13, wherein the thin film iris includes three of the telescoping thin films and three of the drive electrodes, each of the drive electrodes being disposed outside of a thin film of each of the telescoping thin films, respectively.

15. The image pickup module according to claim 13, wherein the optical lens includes a barrel and a series of optical lenses provided to the barrel, the innermost telescopic film being attached to an end face of the barrel.

16. The camera module of claim 13, wherein the lens assembly comprises a lens carrier, the optical lens is disposed on the lens carrier, and the innermost telescopic film is attached to an end surface of the lens barrel.

17. A method for controlling the light input of an image pickup module, characterized in that the light input control method comprises the following steps:

(a) The inner sides of the films of the at least two telescopic films define a light inlet channel with a variable area;

(b) When forward excitation is applied to at least two telescopic films, allowing the inner sides of the films of the at least two telescopic films to move towards the direction close to the optical axis of a camera module to stretch so as to reduce the area of the light inlet channel, and allowing less light to reach a photosensitive chip through an optical lens of the camera module after passing through the light inlet channel; and

(c) When negative excitation is applied to at least two telescopic films, the inner sides of the films of the at least two telescopic films are allowed to move towards the direction away from the optical axis of the camera module to shrink so as to enlarge the area of the light inlet channel, and more light rays are allowed to reach the photosensitive chip through the optical lens of the camera module after passing through the light inlet channel.

18. The light intake amount control method according to claim 17, wherein when the number of the stretchable films is two, two of the stretchable films are symmetrically disposed.

19. The light-entering amount control method according to claim 17, wherein when the number of the telescopic films is three or more, the three or more telescopic films are arranged centering symmetrically with respect to an optical axis of the image pickup module as a symmetry axis.

20. The light intake amount control method according to any one of claims 17 to 19, wherein at least one of the stretchable film and the other stretchable film have a height difference.

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