WO2021027375A1

WO2021027375A1 - Image capturing module, and electronic apparatus

Info

Publication number: WO2021027375A1
Application number: PCT/CN2020/095050
Authority: WO
Inventors: 王庆平; 李瑞华; 郑士胜
Original assignee: 华为技术有限公司
Priority date: 2019-08-15
Filing date: 2020-06-09
Publication date: 2021-02-18
Also published as: CN112394576B; CN112394576A

Abstract

Embodiments of the present application provide an image capturing module and an electronic apparatus, pertaining to the technical field of optical imaging, and used to address the problem in which variable iris diaphragms composed of mechanical blades and having a large number of modes have an excessive thickness. A lens assembly in the image capturing module comprises a first lens and a second lens. A diaphragm structure is located between the first lens and the second lens. The diaphragm structure comprises a first transparent electrode layer, a second transparent electrode layer, and a light adjustment layer located between the first transparent electrode layer and the second transparent electrode layer. The first transparent electrode layer and the second transparent electrode layer are used to form, in a pre-determined operation state, multiple light adjustment regions on the light adjustment layer. The multiple light adjustment regions comprise a central light adjustment region and at least one peripheral light adjustment region located at a periphery of the central light adjustment region.

Description

Camera module and electronic equipment

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office on August 15, 2019, the application number is 201910755250.9, and the application name is "a camera module, electronic equipment", the entire content of which is incorporated herein by reference Applying.

Technical field

This application relates to the field of optical imaging technology, and in particular to a camera module and electronic equipment.

Background technique

With the advancement of science and technology, electronic devices nowadays are developing in the direction of multi-function and small size. In order to meet the photographing demand, a camera is provided in the electronic device. The camera is usually equipped with a variable aperture to adapt to different photographing environments.

At present, the aforementioned variable aperture includes a plurality of blades 100 as shown in FIG. 1a. The plurality of blades 100 can be relatively rotated through mechanical connection, thereby changing the size of the aperture of the light-passing hole 101 surrounded by the blades 100 to realize the change of the aperture. For example, in FIG. 1a, the aperture diameter of the light-through hole 101 is smaller than the aperture diameter of the light-through hole 101 in FIG. 1b. Therefore, the aperture when the variable aperture is in the state shown in FIG. 1a is smaller than the aperture when the variable aperture is in the state shown in FIG. 1b.

The number of blades 100 in the iris diaphragm is proportional to the gear position of the iris diaphragm that the iris diaphragm can obtain. That is, the more the number of blades 100 in the iris diaphragm, the more the adjustable range of the aperture diameter of the light-passing hole 101, and the more the gear positions of the iris diaphragm. However, when there are more adjustable iris gears, the more the number of blades 100 will be, and the larger the overall thickness of the iris will be. As a result, the size of the camera in the electronic device is relatively large, which is not conducive to the miniaturization of the electronic device.

Summary of the invention

The embodiments of the present application provide a camera module and electronic equipment, which are used to solve the problem of a variable aperture composed of mechanical blades, and when the adjustable aperture has more gears, the thickness of the variable aperture is larger.

In order to achieve the foregoing objectives, the following technical solutions are adopted in the embodiments of this application:

The first aspect of the embodiments of the present application provides a camera module. The camera module includes a lens assembly and a diaphragm structure. Wherein, the aforementioned lens assembly includes a first lens and a second lens located on the same optical axis. The diaphragm structure is located between the first lens and the second lens. The aperture structure includes a first transparent electrode layer, a second transparent electrode layer, and a dimming layer located between the first transparent electrode layer and the second transparent electrode layer. The first transparent electrode layer and the second transparent electrode layer are used for forming a plurality of dimming regions on the dimming layer in a preset working state. The plurality of dimming zones includes a central dimming zone, and at least one peripheral dimming zone located on the periphery of the central dimming zone. The transmittance of the above-mentioned dimming zone can be achieved by applying voltages to the first transparent electrode layer and the second transparent electrode layer located on both sides of the dimming layer, so that the voltage between the first transparent electrode layer and the second transparent electrode layer The electric field changes the light transmittance of the dimming layer at the position of the dimming zone. In this way, when it is necessary to obtain multiple adjustable iris gears, it is only necessary to increase the active area of the electric field formed by the first transparent electrode layer and the second transparent electrode layer, which can increase the peripheral adjustment in the above-mentioned dimming zone. The purpose of the number of light zones. It can be seen from the foregoing that the embodiment of the present application can realize multiple adjustable aperture gear positions. Since the second transparent electrode layer is located on the same side of the light-adjusting layer, when the action area of the electric field formed by the first transparent electrode layer and the second transparent electrode layer increases, the thickness of the diaphragm structure will not be affected. This can solve the problem that the current iris diaphragm composed of mechanical blades is used, and the thickness of the iris diaphragm is relatively large when the adjustable diaphragm has more gears.

According to the first aspect, in a possible design, the first transparent electrode layer covers all the dimming layers. In addition, the second transparent electrode layer includes a plurality of second electrodes arranged at intervals. Any second electrode has a ring structure. The multiple second electrodes are sequentially arranged from the inside to the outside. In this way, the voltage of each second electrode in the second transparent electrode layer can be individually controlled, so that each second electrode and the first transparent electrode layer can form a transparent layer on the dimming layer in a preset working state. The above-mentioned peripheral dimming zone with adjustable overrate.

In combination with a possible design in the first aspect, a plurality of second electrodes have a common center. The center of the second electrode is on the optical axis of the first lens and the second lens. Thus, the center of the entire diaphragm structure can be located on the optical axis of the first lens and the second lens. Helps improve the accuracy of focusing during shooting.

According to the first aspect, in another possible design, the first transparent electrode layer covers the dimming layer. The second transparent electrode layer includes a plurality of electrode groups. Any electrode group includes a plurality of block-shaped second electrodes with preset intervals. The plurality of block-shaped second electrodes are distributed in a ring shape, and different electrode groups are distributed from the inside to the outside. In this way, each second electrode in the same electrode group can be applied with the same voltage, or each second electrode in the same electrode group can be applied with a different voltage. As a result, the peripheral dimming area with adjustable transmittance is formed on the dimming layer under the preset working state of each second electrode and the first transparent electrode layer.

In combination with at least one possible design in the first aspect, the dimming layer is a liquid crystal layer. The camera module also includes a first retaining wall arranged around the periphery of the dimming layer. The first retaining wall, the first lens and the second lens form an accommodating cavity for accommodating the dimming layer. In this case, the electric field between the second electrode and the first transparent electrode layer in each dimming zone can be used to achieve the purpose of controlling the deflection angle of the liquid crystal molecules in each dimming zone. Thereby changing the light transmittance of each dimming zone.

In combination with at least one possible design in the first aspect, the light-adjusting layer is a polymer dispersed liquid crystal film. In the polymer dispersed liquid crystal film, the liquid crystal is dispersed in the organic solid polymer matrix in micron-sized droplets. Under the action of the electric field generated between the respective second electrodes in the first transparent electrode layer and the second transparent electrode layer, the optical axis orientation of the liquid crystal droplets can be adjusted to make it possible to present a transparent or opaque state.

In combination with a possible design in the first aspect, the camera module further includes a plurality of second retaining walls with a circular ring structure. Each second retaining wall is located between two adjacent second electrodes, and the second retaining wall is in contact with the first transparent electrode layer. The dimming layer includes an electrochromic layer and an electrolyte layer located between the first transparent electrode layer and the second electrode. Under the action of the electric field generated between the respective second electrodes in the first transparent electrode layer and the second transparent electrode layer, the electrolyte layer can be controlled to inject free ions from the second electrode and the first transparent electrode layer to the electro The color changing layer makes the electrochromic layer change from transparent to opaque, and the light transmittance of the dimming zone is close to or equal to zero. Alternatively, the control electrolyte layer can extract free ions from the electrochromic layer and transport them to the second electrode and the first transparent electrode layer, so that the electrochromic layer changes from opaque to transparent, so that the dimming area is transparent .

In combination with a possible design in the first aspect, the camera module further includes a plurality of second retaining walls in a ring structure. Each second retaining wall is located between two adjacent electrode groups, and the second retaining wall is in contact with the first transparent electrode layer. The dimming layer includes an electrochromic layer and an electrolyte layer located between the first transparent electrode layer and the second electrode. The technical effects of the electrochromic layer and the electrolyte layer are the same as those described above, and will not be repeated here.

According to the first aspect, in another possible design, both the first transparent electrode layer and the second transparent electrode layer cover the dimming layer. Both the first transparent electrode layer and the second transparent electrode layer are circular. By changing the voltage applied to the first transparent electrode layer and the second transparent electrode layer, the electric field between the first transparent electrode layer and the second transparent electrode layer is changed, so as to adjust the peripheral dimming formed on the dimming layer The purpose of zone transmittance.

In combination with at least one possible design in the first aspect, the dimming layer includes a colored ink layer and an electrolyte layer. The camera module also includes a first retaining wall arranged around the dimming layer. The first retaining wall, the first lens and the second lens form an accommodating cavity for accommodating the dimming layer. Under the action of the electric field generated between the respective second electrodes in the first transparent electrode layer and the second transparent electrode layer, the surface tension of the electrolyte layer and the colored ink layer can be controlled, thereby promoting the ink in the colored ink layer in the first Movement between the lens and the second lens. As a result, the light transmittance of the dimming zone with ink is close to or equal to 0, and the dimming zone without ink is transparent.

In combination with at least one possible design in the first aspect, the camera module further includes a first electronic control pin and a second electronic control pin. Wherein, the first electric control pin is arranged on the side surface of the first lens facing the second lens, and the first electric control pin is electrically connected with the first transparent electrode layer. Thus, a voltage is provided to the first transparent electrode layer through the first electronic control pin. A plurality of second electronic control pins are arranged on a side surface of the second lens facing the first lens. Each second electronic control pin is electrically connected with the second electrode. Therefore, a voltage can be provided to at least one second electrode in a dimming area through a second electronic control pin.

In combination with at least one possible design in the first aspect, the camera module further includes a lens barrel, a lens motor, and a module circuit board. Among them, the lens assembly is installed on the lens barrel; the lens barrel includes an embedded metal circuit. The first electric control pin and the second electric control pin are electrically connected with the embedded metal circuit. The lens motor is electrically connected with the embedded metal circuit of the lens barrel and is used to drive the lens in the lens assembly. The module circuit board includes a power supply circuit. The power supply circuit is electrically connected to the lens motor, and is used to supply power to the lens motor. In this case, the power supply circuit can provide a voltage to the first electronic control pin through the embedded metal circuit of the lens motor and the lens barrel, so as to charge the first transparent electrode layer through the first power supply pin. In addition, the power supply circuit can also provide voltage to the second electronic control pin through the embedded metal circuit of the lens motor and the lens barrel, so as to charge each second electrode through different second power supply pins.

In combination with at least one possible design in the first aspect, the module circuit board further includes an image processing circuit. The camera module also includes a photosensitive element. The photosensitive element is electrically connected with the image processing circuit. The photosensitive element is used to convert the light passing through the lens assembly into image data and transmit it to the image processing circuit to process the image data or take the image through the image processing circuit.

In combination with at least one possible design in the first aspect, the camera module further includes a filter and a module base. Among them, the filter is located on the image side of the lens assembly. In addition, the module base is located between the lens assembly and the photosensitive element; the module base electrically connects the motor and the power supply circuit on the module circuit board. Wherein, the module base is provided with a through hole at a position corresponding to the lens assembly. The filter is located in the through hole. The filter can filter out the part of the light that passes through the lens assembly that is unfavorable for imaging, such as infrared light. Circuit buried wires are arranged in the module base. Therefore, the power supply circuit and the motor are electrically connected through the above-mentioned circuit buried wire.

According to the first aspect, in another possible design, the distance on the optical axis between the first lens and the second lens is D12, and D12≤0.2 mm. In this case, the thickness (the sum of the thickness of the first transparent electrode layer, the second transparent electrode layer, and the dimming layer) of the diaphragm structure located between the first lens and the second lens may be less than or equal to 0.2 mm. Therefore, the size of the camera module can be further reduced, and the total optical path length can be shortened.

According to the first aspect, in another possible design, the first lens has positive refractive power, the object side surface of the first lens is convex, and the surface close to the diaphragm structure (ie, the image side) is flat. Therefore, the entire lens assembly can have a better light converging ability on the object side, and the total optical path length of the lens assembly can be reduced. The second lens has a negative refractive power, and the surface of the second lens close to the diaphragm structure (i.e., the object side) is a plane. In this way, a part of the aberration caused by the positive refractive power of the first lens can be compensated to achieve the purpose of improving the imaging quality of the camera module.

In combination with a possible design in the first aspect, when the diaphragm structure and the first lens and the second lens are independent structures, the surface of the first lens close to the diaphragm structure and the surface of the second lens close to the diaphragm structure are both Parallel to the surface where the diaphragm structure is located. Thereby, the adhesion of the first lens, the second lens and the diaphragm structure can be made closer. Or, when the first transparent electrode layer and the second transparent electrode layer in the diaphragm structure are carried on the first lens and the second lens, the first lens is close to the surface of the diaphragm structure, and the second lens is close to the diaphragm structure The surfaces are parallel to the surface where the dimming layer is located.

In combination with a possible design in the first aspect, the image side surface of the first lens and the object side surface of the second lens have a nano-beam modulation structure. In this way, the light entering the diffractive optical element and the inside of the super lens can change the optical path through the light wave modulation effect of the above-mentioned nano beam modulation structure, so as to converge the light of different wavelength ranges to the same intersection point, so that the electronic equipment can be shared. The burden of chromatic aberration can achieve the purpose of optimizing the image quality, increasing the aperture or shortening the total length of the optical path.

According to the first aspect, in another possible design, the lens assembly further includes a third lens, a fourth lens, a fifth lens, and a third lens that are sequentially away from the image side of the second lens and are located on the same optical axis as the second lens. Six lens, seventh lens. The third lens has a negative refractive power, thereby helping to correct the curvature of field of the lens assembly, so that the imaging surface of the lens assembly is flatter. The fourth lens has a positive refractive power, so that the converging ability of the light at the object side end of the fourth lens can be dispersed, so as to avoid excessive refractive power of the first lens, which may cause excessive aberration of the lens assembly. The fifth lens has refractive power, the object side surface is concave, and the image side surface is convex, which helps increase the symmetry of the lens assembly, reduce its sensitivity, and improve imaging quality. The sixth lens has refractive power, and its object-side surface and image-side surface are both aspherical. The aspheric surface can make the lens easy to fabricate into a shape other than a spherical surface, and obtain more control variables to reduce aberrations, thereby reducing the number of lenses required, and thus can effectively reduce the total optical length. In addition, at least one of the object side surface and the image side surface of the sixth lens has at least one inflection point, which helps to further correct the off-axis aberration of the lens assembly. The seventh lens has refractive power, the object side surface and the image side surface are both aspherical, and at least one of the object side surface and the image side surface of the seventh lens has at least one inflection point. The technical effects of the aspheric surface and the inflection point are the same as described above, and will not be repeated here. In addition, the lens assembly satisfies the following conditions: 0.6<|f1/f|<1.2; |f6/f|>1.0; |f7/f|>1.0. Among them, f is the focal length of the lens assembly; f1 is the focal length of the first lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens. In this way, by setting the ratio of the focal length f1 of the first lens to the focal length f of the lens assembly to satisfy 0.6<|f1/f|<1.2, the ratio of the focal length f6 of the sixth lens to the focal length f of the lens assembly is set to satisfy |f6 /f|>1.0, set the ratio of the focal length f7 of the seventh lens to the focal length f of the lens assembly to satisfy |f7/f|>1.0, which helps to control the main refractive power of the lens assembly at the first lens and away from the sixth The lens and the seventh lens can make the lens assembly have sufficient light converging ability at the object side end, which helps to shorten the total length and maintain the miniaturization of the lens assembly.

According to the first aspect, in another possible design, the lens assembly further includes a third lens, a fourth lens, a fifth lens, and a third lens that are sequentially away from the image side of the second lens and are located on the same optical axis as the second lens. Six lens, seventh lens, eighth lens. The third lens has negative refractive power. The fourth lens has positive refractive power. The fifth lens has refractive power, the object side surface is concave, and the image side surface is convex. The setting methods and technical effects of the third lens, the fourth lens, and the fifth lens are described in the same industry, and will not be repeated here. The sixth lens has negative refractive power, its object side surface is concave, and the image side surface is convex. In this way, it helps to increase the symmetry of the lens assembly to reduce sensitivity and improve imaging quality. The seventh lens has positive refractive power, and its object side surface and image side surface are both aspherical. In this way, the seventh lens has a positive refractive power, which can be used with the sixth lens to further reduce the aberration of the lens assembly. The eighth lens has refractive power, the object side surface and the image side surface are both aspherical, and at least one surface of the eighth lens has at least one inflection point. The technical effects of the aspheric surface and the inflection point are the same as in Example 4, and will not be repeated here. The lens assembly meets the following conditions: 0.7<|f1/f|<1.3; 0.6<|f7/f|<1.0; 0.5<|f8/f|<0.9. Among them, f is the focal length of the lens assembly; f1 is the focal length of the first lens; f7 is the focal length of the seventh lens, and f8 is the focal length of the eighth lens. In this way, by setting the ratio of the focal length f1 of the first lens to the focal length f of the lens assembly to satisfy 0.7<|f1/f|<1.3, it helps to ensure that the first lens in the lens assembly located on the object side of the lens assembly That is, the first lens has sufficient refractive power, which can make the object side end of the lens assembly have sufficient light condensing ability, which helps to shorten the total system length of the lens assembly, so that the lens assembly can be miniaturized. In addition, the ratio of the focal length f7 of the seventh lens to the focal length f of the lens assembly is set to satisfy 0.6<|f7/f|<1.0, and the ratio of the focal length f8 of the eighth lens to the focal length f of the lens assembly is set to satisfy 0.5<|f8/ f|<0.9, which also helps to shorten the total system length of the lens assembly.

In combination with a possible design in the first aspect, the lens assembly satisfies the following conditions: D23≤0.15mm; 0<D12/D34<0.3; 0<D23/D34<0.3. Among them, D12 is the distance on the optical axis between the first lens and the second lens; D23 is the distance on the optical axis between the second lens and the third lens; D34 is the distance between the third lens and the fourth lens The spacing on the optical axis. In this way, by limiting the air gap between the first three lenses in the lens assembly, that is, the above-mentioned first lens, second lens, and third lens (that is, the distance between the two lenses on the optical axis), it will help make the lens assembly The lens that provides the main refractive power is close to the diaphragm structure, which facilitates aberration correction and shortens the overall length of the lens assembly.

A second aspect of the present application provides an electronic device including a display screen and any one of the above-mentioned camera modules. The display screen has a display surface and a back surface away from the display screen. The camera module is located on the back of the display screen. Alternatively, a mounting hole is provided on the display screen, and the camera module is located in the mounting hole. The above-mentioned electronic device has the same technical effect as the camera module provided in the foregoing embodiment, and will not be repeated here.

According to the second aspect, in a possible design, the display screen also includes a middle frame and a rear shell. The side surface of the middle frame away from the rear case is connected with the display screen. A main board is arranged on the surface of the middle frame facing the rear shell. The camera module includes a module circuit board, and the module circuit board is electrically connected to the main board. Therefore, the main board can process the image data captured by the module circuit board and transmit it to the display screen for display.

It should be understood that the above possible implementation schemes can be combined arbitrarily without violating the laws of nature.

Description of the drawings

FIG. 1a is a schematic structural diagram of a variable aperture provided by an embodiment of the application;

FIG. 1b is a schematic structural diagram of another variable aperture provided by an embodiment of the application;

2a is a schematic structural diagram of an electronic device provided by an embodiment of this application;

FIG. 2b is a schematic diagram of a structure of the display screen in FIG. 2a;

FIG. 3a is a schematic diagram of a setting method of a camera module provided by an embodiment of the application;

FIG. 3b is a schematic diagram of another setting method of a camera module provided by an embodiment of the application;

FIG. 3c is a schematic diagram of an arrangement position of the camera module on the display screen provided by an embodiment of the application;

FIG. 3d is a schematic diagram of another setting method of a camera module provided by an embodiment of the application;

4 is a schematic structural diagram of a camera module provided by an embodiment of the application;

FIG. 5a is a schematic diagram of an aperture structure provided by an embodiment of the application;

5b is a schematic diagram of the central dimming area and the peripheral dimming area of the diaphragm structure shown in FIG. 5a;

5c is another schematic diagram of the central dimming area and the peripheral dimming area of the diaphragm structure shown in FIG. 5a;

5d is a schematic diagram of another diaphragm structure provided by an embodiment of the application;

FIG. 6a is a schematic diagram of an arrangement of the second transparent electrode layer in the aperture structure provided by an embodiment of the application;

Figure 6b is a cross-sectional view taken along the broken line D-D in Figure 6a;

6c is a schematic diagram of another arrangement of the second transparent electrode layer in the aperture structure provided by the embodiment of the application;

Figure 6d is a cross-sectional view taken along the dashed line F-F in Figure 6c;

Figure 7a is another cross-sectional view taken along the broken line D-D in Figure 6a;

FIG. 7b is a schematic diagram of an aperture size setting of the aperture structure provided by an embodiment of the application;

Figure 7c is a cross-sectional view obtained by performing another cut along the dotted line D-D in Figure 6a;

FIG. 7d is a schematic diagram of another setting of the aperture size of the aperture structure provided by the embodiment of the application;

FIG. 7e is a schematic diagram of another aperture size setting of the aperture structure provided by an embodiment of the application;

FIG. 8a is a schematic diagram of an arrangement of the dimming layer in the diaphragm structure provided by an embodiment of the application;

8b is a schematic diagram of another setting method of the dimming layer in the diaphragm structure provided by the embodiment of the application;

Fig. 8c is a schematic diagram of an aperture size of the diaphragm structure shown in Fig. 8b;

8d is a schematic diagram of another aperture size of the aperture structure shown in FIG. 8b;

Figure 8e is a schematic structural diagram of the second retaining wall in Figure 8a;

9 is a schematic diagram of another arrangement of the second transparent electrode layer of the aperture structure provided by an embodiment of the application;

10 is a schematic diagram of another setting method of the dimming layer in the diaphragm structure provided by the embodiment of the application;

11 is a schematic structural diagram of another camera module provided by an embodiment of the application;

FIG. 12a is a schematic diagram of an electronic control pin provided by an embodiment of the application;

FIG. 12b is a schematic diagram of another electronic control pin provided by an embodiment of the application;

FIG. 13 is a schematic diagram of the structure of the module circuit board in FIG. 10;

FIG. 14a is a schematic diagram of a lens assembly provided by an embodiment of the application;

Fig. 14b is a schematic diagram of imaging of the lens assembly shown in Fig. 14a under a larger aperture;

Fig. 14c is a schematic diagram of imaging of the lens assembly shown in Fig. 14a at a smaller aperture;

FIG. 15 is a schematic diagram of another lens assembly provided by an embodiment of the application.

Reference signs:

100-blade; 101-light hole; 01-electronic equipment; 10-display screen; 11-middle frame; 12-shell; 13-BLU; 20-camera module; 103-transparent area; 104-installation area 21-lens assembly; 211-first lens; 212-second lens; 22-aperture structure; 200-central dimming zone; 201-peripheral dimming zone; 30-dimming layer; 31-first transparent electrode 32-second transparent electrode layer; 320-second electrode; 321-auxiliary electrode; 322-electrode group; 33-first retaining wall; 301-liquid crystal molecules; 3022-electrolyte layer; 3023-colored ink layer; 3021 -Electrochromic layer; 34-second retaining wall; 41-lens barrel; 410-metal circuit; 42-lens motor; 43-module circuit board; 44-photosensitive element; 45-filter; 46-module Base; 460-through hole; 51-first electric control pin; 52-second electric control pin; 430-power supply circuit; 431-image processing circuit; 213-third lens; 214-fourth lens; 215- Fifth lens; 216-sixth lens; 217-seventh lens; 220-imaging surface; 218-eighth lens.

detailed description

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

Hereinafter, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of these features. In the description of this application, unless otherwise specified, the meaning of "plurality" may be two or more.

In addition, in this application, the azimuth terms such as “upper”, “lower”, “left”, and “right” may include but are not limited to the directions defined relative to the schematic placement of the components in the drawings. It should be understood that these directions Sexual terms can be relative concepts, and they are used for relative description and clarification, which can change accordingly according to the changes in the orientation of the components in the drawings.

In this application, unless expressly stipulated and limited otherwise, the term "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or a whole; it can be directly connected or Can be indirectly connected through an intermediary.

The embodiment of the application provides an electronic device. The electronic device includes, for example, a mobile phone, a tablet computer, a personal digital assistant (PDA), a vehicle-mounted computer, and the like. The embodiments of the present application do not impose special restrictions on the specific form of the above electronic equipment. For the convenience of description, the following description takes the electronic device as a mobile phone as an example.

In this case, as shown in FIG. 2a, the aforementioned electronic device 01 includes but is not limited to a display screen 10, a middle frame 11, and a housing 12. The display screen 10 is installed on a side surface of the middle frame 11 away from the rear housing 12, and the middle frame 11 is connected with the housing 12. Among them, the display screen 10 has a display surface A1 for displaying images and a back surface A2 away from the display surface A1. When the display screen 10 is installed on the middle frame 11 and connected to the casing 12 through the middle frame 11, the casing 12 is arranged on the back A2 of the display screen 10.

In some embodiments of the present application, as shown in FIG. 2b, the aforementioned display screen 10 may include, but is not limited to, a liquid crystal display (LCD). In this case, the aforementioned electronic device 01 may further include a backlight unit (BLU) 13 for providing a light source to the liquid crystal display.

Optionally, in some other embodiments of the present application, the above-mentioned display screen 10 may include, but is not limited to, an organic light emitting diode (OLED) display screen. The OLED display screen can realize self-luminescence, so the electronic device No need to set the above BLU in 01.

In addition, the above-mentioned electronic device 01 further includes a camera module for realizing image shooting. In some embodiments of the present application, the aforementioned camera module may be used as a rear camera. In this case, as shown in FIG. 3a, the camera module 20 may be located on the back A2 of the display screen 10. In addition, the light-receiving surface (the surface for receiving light) of the camera module 20 can be far away from the back surface A2 of the display screen 10.

Alternatively, in other embodiments of the present application, the aforementioned camera module 20 may be used as a front camera. In this case, as shown in FIG. 3b, the camera module 20 may be located on the back A2 of the display screen 10. In addition, the light-receiving surface of the camera module 20 may face the back A2 of the display screen 10. Based on this, in order to enable light to be incident on the light-receiving surface of the camera module 20, the display screen 10 may have a light-transmitting area 103 at a position corresponding to the camera module 20. The light-transmitting area 103 may be arranged in an effective display area (AA) as shown in FIG. 3c.

Wherein, the light transmittance of the light-transmitting area 103 is greater than the light transmittance of the area except the light-transmitting area 103 in the AA area.

Optionally, in other embodiments of the present application, the aforementioned camera module 20 may be used as a front camera. In this case, as shown in FIG. 3d, an installation area 104 may be provided on the display screen 10, and the camera module 20 is located in the installation area 104. In addition, the light-receiving surface of the camera module 20 may be located on the same side as the display surface A1 of the display screen 10. Wherein, in FIG. 3d, the diagonally filled parts around the installation area 104 all represent the display screen 10.

The structure of the above-mentioned camera module 20 is described below with an example.

As shown in FIG. 4, the camera module 20 may include, but is not limited to, a lens assembly 21. The lens assembly 21 may, but is not limited to, include a first lens 211 and a second lens 212 located on the same optical axis O-O. In some embodiments of the present application, the above-mentioned first lens 211 may be a lens in the lens assembly 21 that is closer to the object side (ie, the side closer to the shooting object, the left side in the figure). The second lens 212 may be a lens adjacent to the first lens 211.

As shown in FIG. 4, the first lens 211 may have a positive refractive power, or it may be understood that the first lens 211 is a convex lens. In this way, the entire lens assembly 21 can have a better light converging ability on the object side, and the total optical path length of the lens assembly 21 can be reduced. In some embodiments of the present application, the object side (left side) surface of the first lens 211 is convex.

In addition, the second lens 212 may have a negative refractive power, that is, the second lens 212 is a concave lens. In this way, a part of the aberration caused by the positive refractive power of the first lens 211 can be compensated, and the imaging quality of the camera module 20 can be improved.

On this basis, as shown in FIG. 4, the camera module 20 may further include an aperture structure 22. The diaphragm structure 22 may be located between the first lens 211 and the second lens 212. In order to enable the diaphragm structure 22 to better contact the first lens 211 and the second lens 212. The image side (the side used for imaging, the right side in the figure) surface of the first lens 211, that is, the side surface close to the diaphragm structure 22 may be flat. The object side (left side in the figure) surface of the second lens 212, that is, the side surface close to the diaphragm structure 22 may be flat.

In some embodiments of the present application, the image side surface of the first lens 211 and the object side surface of the second lens 212 may be parallel to the plane where the diaphragm structure 22 is located. In this way, the first lens 211 and the aperture structure 22 and the second lens 212 and the aperture structure 22 can be better attached.

On this basis, the image side (right side in the figure) surface of the first lens 211 and the object side (left side in the figure) surface of the second lens 212 may have a nano-beam modulation structure. In some embodiments of the present application, the first lens 211 or the second lens 212 having the above-mentioned nano-beam modulation structure may be used as diffractive optical elements (DOE) or meta-lens.

In this way, the light entering the DOE and the inside of the super lens can change the optical path through the light wave modulation effect of the above-mentioned nanobeam modulation structure, thereby converging light of different wavelength ranges to the same intersection point, thereby sharing the electronic device 01 to eliminate chromatic aberration The burden of optimizing the image quality, increasing the aperture or shortening the total length of the optical path.

On this basis, the above-mentioned aperture structure 22 may include, but is not limited to, the first transparent electrode layer 31 and the second transparent electrode layer 32 as shown in FIG. 5a, as well as the first transparent electrode layer 31 and the second transparent electrode layer 32. Between the dimming layer 30.

The first transparent electrode layer 31 and the second transparent electrode layer 32 are used to form a plurality of dimming areas on the dimming layer 30 as shown in FIG. 5b in a preset working state. The plurality of dimming zones may include a central dimming zone 200 and at least one peripheral dimming zone 201 located at the periphery of the central dimming zone 200.

It should be noted that the foregoing preset working state may include, but is not limited to, inputting voltages to the first transparent electrode layer 31 and the second transparent electrode layer 32, respectively, so that the first transparent electrode layer 31 and the second transparent electrode layer 32 An electric field is generated therebetween, so that the state of the dimming area can be formed on the dimming layer 30. When the voltage input to the first transparent electrode layer 31 and the second transparent electrode layer 32 is changed, the electric field generated between the first transparent electrode layer 31 and the second transparent electrode layer 32 will also change. Below, the light transmittance of the dimming area formed on the dimming layer 30 is changed.

Therefore, a preset working state is associated with a set of voltages provided to the first transparent electrode layer 31 and the second transparent electrode layer 32, the electric field formed by the first transparent electrode layer 31 and the second transparent electrode layer 32, and the The light transmittance of the dimming zone formed on the dimming layer 30 matches.

It should be noted that FIG. 5b is an example in which the diaphragm structure 22 includes a dimming area 201. 5c is an example in which the aperture structure 22 includes three dimming zones, which are respectively the dimming zone 201a, the dimming zone 201b, and the dimming zone 201c arranged in order from the inside to the outside.

Among them, the letters "a", "b" and "c" after the label "201" of the dimming zone are used to illustrate and distinguish multiple dimming zones.

In the present application, the central dimming area 200 may include but is not limited to a circle, and the peripheral dimming area 201 may include, but is not limited to, a circular ring. In order to make the imaging effect of the camera module 20 better, and for the convenience of illustration, the following embodiments all take the central dimming area 200 as a circle and the peripheral dimming area 201 as an example.

In addition, in some embodiments of the present application, as shown in FIG. 5 a, the first transparent electrode layer 31 may be disposed on a side surface of the first lens 211 facing or close to the second lens 212. In the embodiment of the present application, the first transparent electrode layer 31 may be a whole film layer covering the dimming layer 30. The first transparent electrode layer 31 may be a circular film.

As shown in FIG. 5 a, the second transparent electrode layer 32 may be disposed on a side surface of the second lens 212 facing or close to the first lens 211.

Alternatively, in some other embodiments of the present application, as shown in FIG. 5d, the second transparent electrode layer 32 is disposed on a side surface of the first lens 211 facing or close to the second lens 212. The first transparent electrode layer 31 is disposed on a side surface of the second lens 212 facing or close to the first lens 211.

The above is that the first transparent electrode layer 31 (or the second transparent electrode layer 32) is disposed on the first lens 211, and the second transparent electrode layer 32 (or the first transparent electrode layer 31) is disposed on the second lens 212. For example, the arrangement of the first transparent electrode layer 31 and the second transparent electrode layer 32 in the diaphragm structure 22 located between the first lens 211 and the second lens 212 is illustrated. In this case, the first lens 211 and the second lens 212 serve as the carrier of the first transparent electrode layer 31 and the second transparent electrode layer 32 in the diaphragm structure 22.

In another possible implementation manner of the present application, the diaphragm structure 22 may be independent of the first lens 211 and the second lens 212. For example, the diaphragm structure 22 may have an upper substrate close to the first lens 211 and a lower substrate close to the second lens 212. The first transparent electrode layer 31 and the second transparent electrode layer 32 may be fabricated on the above-mentioned upper substrate and lower substrate, respectively. Other methods for arranging the diaphragm structure 22 between the first lens 211 and the second lens 212 will not be repeated here.

The following describes the structure of the light-adjusting layer 30 and the manner in which multiple light-adjusting areas are formed on the light-adjusting layer 30 under the preset working state of the first transparent electrode layer 31 and the second transparent electrode layer 32 in combination with different examples. for example.

Example one

In some embodiments of this example, the above-mentioned first transparent electrode layer 31 can be known from the above, and may be a circular film covering the dimming layer 30.

In addition, the second transparent electrode layer 32 in FIG. 5a may include a plurality of second electrodes 320 arranged at intervals in FIG. 6a. Wherein, the second transparent electrode layer 32 includes a plurality of second electrodes 320 arranged at intervals may include, but is not limited to, the second transparent electrode layer 32 includes a plurality of second electrodes 320, and one of two adjacent second electrodes 320 The space has a gap H as shown in FIG. 6b (a cross-sectional view cut along the dashed line DD in FIG. 6a). The gap H is used to separate two adjacent second electrodes 320, so as to avoid the phenomenon of electric field interference after voltage is input to two adjacent second electrodes 320.

The present application does not limit the size of the gap H between two adjacent second electrodes 320, as long as the gap H can prevent electric field interference between two adjacent second electrodes 320.

On this basis, as shown in FIG. 6a, any one of the second electrodes 320 may have a ring structure. The plurality of second electrodes 320 are sequentially arranged from the inside to the outside. In some embodiments of the present application, the multiple second electrodes 320 may have a common center. Based on this, the center of the second electrode 320 may be on the optical axis O-O of the first lens 211 and the second lens 212 (as shown in FIG. 4).

In this case, each of the second electrode 320 and the first transparent electrode layer 31 is used to form a peripheral dimming area on the dimming layer 30 in a preset working state. For example, in FIG. 6a, the three second electrodes 320 arranged in order from the inside to the outside and the first transparent electrode layer 31 in the preset working state respectively form as shown in FIG. 5c, which are arranged in order from the inside to the outside. The peripheral dimming area 201a, the peripheral dimming area 201b, and the peripheral dimming area 201c.

Wherein, the orthographic projection of the second electrode 320 on the second lens 212 overlaps the orthographic projection of the peripheral dimming area 201 formed on the dimming layer 30 by the second electrode 320 on the second lens 212. That is, the width of the second electrode 320 can determine the width of a peripheral dimming area formed on the dimming layer 30 by the second electrode 320 and the first transparent electrode layer 31 in the preset working state.

Therefore, when the width of the second electrode 320 is larger, a peripheral dimming area with a larger width can be obtained, and vice versa. The present application does not limit the width of the second electrode 320, and those skilled in the art can adjust the width of the second electrode 320 according to the aperture size required by the diaphragm structure 22 at a certain aperture value.

It should be noted that, in some embodiments of the present application, the aforementioned central dimming area 200 may be in a transparent state when the first transparent electrode layer 31 is energized or not. In this case, as shown in FIG. 6b, the second transparent electrode layer 32 may be hollowed out in the central dimming area 200, that is, there is no electrode pattern.

Alternatively, in other embodiments of the present application, the second transparent electrode layer 32 may further include a circular auxiliary electrode 321 arranged in the central dimming area 200, as shown in FIG. 6c. As shown in FIG. 6d (a cross-sectional view taken along the dashed line F-F in FIG. 6c), there may be a gap L between the auxiliary electrode 321 and the second electrode 320 adjacent to the auxiliary electrode 321.

The present application does not limit the size of the gap L, as long as it can ensure that no electric field interference occurs between the auxiliary electrode 321 and the second electrode 320 adjacent to the auxiliary electrode 321. In this way, when the diaphragm structure 22 is working normally, the voltage input between the first transparent electrode layer 31 and the auxiliary electrode 321 can be controlled to make the central dimming area 200 in a transparent state.

For the convenience of description, the following descriptions are all based on an example in which the central dimming area 200 is in a transparent state when the aperture structure 22 is in a normal working state and in a non-working state.

Wherein, the material constituting each second electrode 320 in the first transparent electrode layer 31 and the second transparent electrode layer 32 and the auxiliary electrode 321 may be a transparent conductive material. For example, indium tin oxide (Indium Tin Oxide, ITO), indium zinc oxide (Indium Zinc Oxide, IZO).

In the embodiment of the present application, the materials of any two second electrodes 320 may be the same or different. For the sake of simplicity, optionally, the materials of each second electrode 320 in the first transparent electrode layer 31 and the second transparent electrode layer 32 and the auxiliary electrode 321 may be the same, for example, both may be the above ITO.

In this case, when a voltage is applied to each of the second electrodes 320 of the first transparent electrode layer 31 and the second transparent electrode layer 32, the transmission of the dimming layer 30 at the position of each peripheral dimming area 201 can be controlled. rate. For example, the voltage difference between the first transparent electrode layer 31 and each second electrode 320 can be controlled, so that the diaphragm structure 22 has a plurality of adjustable diaphragm gears. In the following, the process of the diaphragm structure 22 to realize the multi-level aperture adjustment is described as an example.

For example, in some embodiments of the present application, as shown in FIG. 7a, the dimming layer 30 may be a liquid crystal layer, and liquid crystal molecules 301 are disposed in the liquid crystal layer. Since the liquid crystal layer is liquid, the liquid crystal layer can be filled in the gap between two adjacent second electrodes 320.

In order to seal the liquid crystal molecules 301 in the liquid crystal layer. As shown in FIG. 7b, the aforementioned camera module 20 may further include a first retaining wall 33 arranged around the periphery of the liquid crystal layer. The first retaining wall 33 and the first lens 211 and the second lens 212 may form a liquid crystal cell for containing the liquid crystal layer.

When the light transmittance of the central dimming zone 200 is the largest and the central dimming zone 200 is in a transparent state, for example, voltage is provided to the first transparent electrode layer 31 and all the second electrodes 320 (shown in FIG. 6a), In this way, the voltage difference between the first transparent electrode layer 31 and each of the second electrodes 320 can all be the first voltage V1. For example, the first voltage V1=0V.

In this case, the second electrode 320 and the first transparent electrode layer 31 in the above-mentioned peripheral dimming regions (including the peripheral dimming region 201a, the peripheral dimming region 201b, and the peripheral dimming region 201c) can be controlled As shown in FIG. 7a, the angles of the liquid crystal molecules 301 in each peripheral dimming zone are not deflected, and light can pass through the peripheral dimming zones. At this time, the light transmittance of the dimming layer 30 and the light transmittance of the central dimming area 200 at the positions of the peripheral dimming regions may be close to or the same.

In this way, the light incident to the camera module 20 can enter the second lens 212 through the peripheral dimming area 201a, the peripheral dimming area 201b, the peripheral dimming area 201c, and the central dimming area 200 to achieve imaging. At this time, the aperture of the aforementioned camera module 20 may be the maximum aperture as shown in FIG. 7b, for example, Fno=1.4. In this case, the large aperture can be used to shoot a relatively dim scene, so that more light can enter the camera module 20 and reduce noise.

Or, for another example, a voltage is provided to the first transparent electrode layer 31 and each second electrode 320, so that the voltage difference between the first transparent electrode layer 31 and each second electrode 320 can be the second voltage V2. For example, if |V2|<30V, the second voltage V2 is a non-zero value. For example, the second voltage V2=30V.

In this case, the electric field between the second electrode 320 and the first transparent electrode layer 31 in each peripheral dimming area (including the peripheral dimming area 201a, the peripheral dimming area 201b, and the peripheral dimming area 201c) can be made Under the control of, the angles of the liquid crystal molecules 301 in each peripheral dimming area are deflected, and light cannot pass through the peripheral dimming areas.

At this time, the light transmittance of the dimming layer 30 at each peripheral dimming zone position is close to or equal to zero. As a result, the light incident to the camera module 20 can only enter the second lens 212 through the central dimming area 200 to achieve imaging, but cannot enter the second lens 212 through the aforementioned central dimming areas.

In this case, the aperture of the aforementioned camera module 20 may be the smallest aperture as shown in FIG. 7d, for example, Fno=6. In this way, the above-mentioned small aperture can be used to photograph the trajectory of fireworks, the trajectory of meteors, and the atomized flowing water.

Or, for another example, by controlling the voltage of the second electrode 320 used to generate the peripheral dimming region 201c, so that the voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be the aforementioned second voltage V2. It can be seen from the above that the transmittance of the dimming layer 30 at the position of the peripheral dimming region 201c is close to or equal to zero.

In addition, the voltages of the remaining second electrodes 320 are controlled so that the voltage difference between the first transparent electrode layer 31 and the remaining second electrodes 320 can be the first voltage V1=0, so that the peripheral dimming as shown in FIG. 7e The transmittance of the area 201a and the peripheral dimming area 201b is the same as the transmittance of the central dimming area 200.

In this way, the light incident on the camera module 20, as shown in FIG. 7e, can enter the second lens 212 through the peripheral dimming area 201a, the peripheral dimming area 201b, and the central dimming area 200 to achieve imaging, and cannot pass through. It enters the second lens 212 through the above-mentioned peripheral dimming regions 201c. At this time, compared to the structure shown in FIG. 7d, the aperture of the aforementioned camera module 20 has an aperture that is increased, for example, Fno=3.4.

In addition, when the voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be the first voltage V1=0, the transmittance of each peripheral dimming area 201 formed on the dimming layer 30 is the largest. The voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be the second voltage V2, for example, when V2=30V, the transmittance of each peripheral dimming area 201 formed on the dimming layer 30 It is close to or equal to zero as an example.

In some other possible implementation solutions of the present application, when the voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be the first voltage V1=0, the peripheral adjustments formed on the dimming layer 30 The transmittance of the light zone 201 is close to or equal to zero. When the voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be the second voltage V2, for example, when V2=30V, the non-zero value of each peripheral dimming area 201 formed on the dimming layer 30 is transparent. The rate is the largest.

It can be seen from the above that when the voltage difference between the first transparent electrode layer 31 and each second electrode 320 can be the second voltage V2=30V, the first transparent electrode layer 31 and each second electrode 320 are in the preset working state The transmittance of each peripheral dimming area 201 formed on the dimming layer 30 may be zero. In some other possible implementation solutions of the present application, the voltage difference between the first transparent electrode layer 31 and the second electrode 320 may be different, so that the percentage of transmittance of each peripheral dimming area 201 can be adjusted.

For example, the voltage of the second electrode 320 used to generate the peripheral dimming area 201a is controlled so that the voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be 10V, and the dimming at the position of the peripheral dimming area 201a The transmittance of layer 30 may be 60%. The voltage of the second electrode 320 used to generate the peripheral dimming area 201b is controlled so that the voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be 20V, and the dimming layer 30 at the position of the peripheral dimming area 201b The transmittance can be 30%. The voltage of the second electrode 320 used to generate the peripheral dimming area 201c is controlled so that the voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be 30V. The dimming layer 30 at the position of the peripheral dimming area 201c The transmittance can be close to zero.

At this time, the aperture of the diaphragm structure 22 will be smaller than the aperture Fno=3.4 corresponding to FIG. 7e, and greater than the aperture Fno=6 corresponding to FIG. 7d.

It should be noted that the foregoing is only an example of the preset working state of the first transparent electrode layer 31 and the second electrode 320, that is, the manner of setting the voltage difference between the first transparent electrode layer 31 and the second electrode 320. The setting methods of other voltage differences are available in the same way, so I won't repeat them here.

In summary, the diaphragm structure 22 of the camera module 20 provided by the embodiment of the present application has a plurality of dimming zones with adjustable light transmittance (which may include a central dimming zone 200 and a plurality of peripheral dimming zones 201). In addition, the transmittance of the aforementioned dimming zone can be adjusted by voltages respectively applied to the first transparent electrode layer 31 and the second transparent electrode layer 32 located on both sides of the dimming layer 30. In this way, when it is necessary to obtain multiple adjustable iris gears, it is only necessary to increase the number of the second electrodes 320 used to form the second transparent electrode layer 32, which can increase the peripheral dimming in the dimming zone. The purpose of the area 201 number. In this case, the above-mentioned camera module 20 can perform optical imaging of the photographed object, and after the shooting action is triggered, automatically optimize the calculated aperture value according to the system algorithm to adjust the aperture of the diaphragm structure 22 to realize the aperture Fno=1.4~ Fno=6 gears of multiple adjustable apertures.

Since the second electrodes 320 in the second transparent electrode layer 32 are all located on the same side of the dimming layer 30, when the number of the second electrodes 320 increases, the thickness of the aperture structure 22 will not be affected. This can solve the problem that the current iris diaphragm composed of mechanical blades is used, and the thickness of the iris diaphragm is relatively large when the adjustable diaphragm has more gears.

It should be noted that the present application does not limit the appearance contour shape of the aperture structure 22. For example, FIG. 6a illustrates an example in which the appearance contour shape of the aperture structure 22 is a rectangle. In some other embodiments of the present application, the aperture structure 22 may also have other possible shapes such as a circle, a triangle, a diamond, and so on.

Optionally, in other embodiments of this example, the dimming layer 30 may also be a polymer dispersed liquid crystal (PDLC). In this PDLC, liquid crystals are dispersed in an organic solid polymer matrix in micron-sized droplets. Under the action of the electric field generated between the respective second electrodes 320 in the first transparent electrode layer 31 and the second transparent electrode layer 32, the optical axis orientation of the liquid crystal droplets can be adjusted, so that the PDLC can be transparent or opaque. status.

In this case, the arrangement of each second electrode 320 in the second transparent electrode layer 32 is the same as that described above, and will not be repeated here.

Optionally, in other embodiments of the present application, the camera module further includes a plurality of second retaining walls 34 as shown in FIG. 8a. Any second retaining wall 34 is a circular ring structure as shown in FIG. 8e. As shown in FIG. 8a, each second retaining wall 34 is located between two adjacent second electrodes 320. In addition, the second barrier wall 34 is in contact with the first transparent electrode layer 31. In addition, the dimming layer 30 includes an electrochromic layer 3021 and an electrolyte layer 3022 located between the first transparent electrode layer 31 and the second electrode 320.

It should be noted that FIG. 8a is an example in which the electrochromic layer 3021 can be disposed on the first transparent electrode layer 31 and the electrolyte layer 3022 can be disposed on the second electrode 320 as an example. In other embodiments of the present application, the electrochromic layer 3021 may be disposed on the second electrode 320, and the electrolyte layer 3022 may be disposed on the first transparent electrode layer 31.

For example, in the case where the light transmittance of the central dimming area 200 is the largest and the central dimming area 200 is in a transparent state, for example, when the first transparent electrode layer 31 and each second transparent electrode layer 31 as shown in FIG. The electrode 320 provides a voltage, so that the voltage difference between the first transparent electrode layer 31 and each second electrode 320 can be the above-mentioned first voltage V1=0V. At this time, under the control of the electric field between the second electrode 320 and the first transparent electrode layer 31 in the respective peripheral dimming regions, the electrolyte layer 3022 can remove free ions from the second electrode 320 and the first transparent electrode layer 31. It is injected into the electrochromic layer 3021 so that the electrochromic layer 3021 changes from transparent to opaque.

At this time, the light transmittance of the dimming layer 30 at the positions of the above-mentioned peripheral dimming areas (including the peripheral dimming area 201a, the peripheral dimming area 201b, and the peripheral dimming area 201c) is close to or equal to zero. As a result, the light incident to the camera module 20 can only enter the second lens 212 through the central dimming area 200 to achieve imaging, but cannot enter the second lens 212 through the aforementioned central dimming areas. In this case, the aperture of the camera module 20 may be the smallest aperture, for example, Fno=6.

Or, for another example, when a voltage is provided to the first transparent electrode layer 31 and each second electrode 320 as shown in FIG. 8a, so that the voltage difference between the first transparent electrode layer 31 and each second electrode 320 can be The second voltage V2. For example, V2=30V. At this time, under the control of the electric field between the second electrode 320 and the first transparent electrode layer 31 in the respective peripheral dimming regions, the electrolyte layer 3022 can extract free ions from the electrochromic layer 3021 and transfer them to the first transparent electrode layer. In the second electrode 320 and the first transparent electrode layer 31, the electrochromic layer 3021 changes from opaque to transparent.

At this time, the light transmittance of the dimming layer 30 at the positions of the peripheral dimming regions (including the peripheral dimming region 201a, the peripheral dimming region 201b, and the peripheral dimming region 201c) is close to that of the central dimming region 200. Thus, the light incident to the camera module 20 can pass through the peripheral dimming areas 201 and the central dimming area 200, and enter the second lens 212 to achieve imaging. In this case, the aperture of the aforementioned camera module 20 may be the maximum aperture, for example, Fno=1.4.

It should be noted that when the voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be the first voltage V1=0, the transmission of the peripheral dimming regions 201 formed on the dimming layer 30 The rate is close to or equal to zero. When the voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be the second voltage V2, for example, when V2=30V, the non-zero value of each peripheral dimming area 201 formed on the dimming layer 30 is transparent. Take the maximum rate as an example.

In some other possible implementation solutions of the present application, when the voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be the first voltage V1=0, the peripheral adjustments formed on the dimming layer 30 The transmittance of the light zone 201 is the largest. The voltage difference between the first transparent electrode layer 31 and the second electrode 320 can be the second voltage V2, for example, when V2=30V, the transmittance of each peripheral dimming area 201 formed on the dimming layer 30 Close to or equal to zero.

In addition, the voltages of the second electrodes 320 used to generate different peripheral dimming regions 201 can be controlled, so that the voltage difference between the first transparent electrode layer 31 and the different second electrodes 320 is at |V2|<30V, and is Different values are selected in the range of non-zero values, so as to adjust the transmittance percentage of each peripheral dimming area 201. The specific adjustment process is described in the same industry and will not be repeated here.

Optionally, in other embodiments of the present application, as shown in FIG. 8b, the above-mentioned dimming layer 30 may include a colored ink layer 3023 and an electrolyte layer 3022. The colored ink layer 3023 and the electrolyte layer 3022 may be a whole film layer. The colored ink layer 3023 and the electrolyte layer 3022 can be sealed in the containing cavity formed by the first retaining wall 33 and the first lens 211 and the second lens 212.

In this case, under the action of each of the second electrodes 320 in the first transparent electrode layer 31 and the second transparent electrode layer 32, the surface tension of the electrolyte layer 3022 and the colored ink layer 3023 can be controlled, thereby pushing the colored ink layer The ink in 3023 moves between the first lens 211 and the second lens 212.

In this way, when a voltage is applied to the first transparent electrode layer 31 and the second transparent electrode layer 32, the voltage difference between the first transparent electrode layer 31 and the second transparent electrode layer 32 can be the aforementioned first voltage V1= At 0V, the ink in the colored ink layer 3023 is pushed to the edge of the diaphragm structure 22. As shown in FIG. 8c, the area of the central dimming zone 200 is much larger than the area of the peripheral dimming zone 201. Moreover, the central dimming area 200 is transparent because it is not covered by ink, and its light transmittance is the largest. At this time, the diaphragm structure 22 may have a large aperture, for example, Fno=1.4.

When the applied voltage applied to the first transparent electrode layer 31 and the second transparent electrode layer 32 is adjusted so that the voltage difference between the first transparent electrode layer 31 and the second transparent electrode layer 32 can be the above-mentioned second voltage V2, for example When V2=30V, the ink at the edge of the diaphragm structure 22 gradually moves to the center of the diaphragm structure 22, so that the area of the central dimming area 200 is reduced as shown in FIG. 8d, and the peripheral dimming area 201 The area increases. At this time, the diaphragm structure 22 may have a small aperture, for example, Fno=6.

It should be noted that when the pressure difference between the first transparent electrode layer 31 and the second transparent electrode layer 32 can be the above-mentioned first voltage V1=0V, the ink in the colored ink layer 3023 is pushed to the diaphragm. Edge of structure 22. When the pressure difference between the first transparent electrode layer 31 and the second transparent electrode layer 32 can be the above-mentioned second voltage V2, the ink in the colored ink layer 3023 gradually moves to the center of the diaphragm structure 22, thereby making the center adjustment The area of the light zone 200 is reduced as an example.

In some other possible implementation manners of the present application, it is also possible when the voltage difference between the first transparent electrode layer 31 and the second transparent electrode layer 32 may be the above-mentioned first voltage V1=0V, for example, when When no voltage is applied to the transparent electrode layer 31 and the second transparent electrode layer 32, because the ink in the colored ink layer 3023 does not move, it is evenly dispersed in each dimming zone, so that the light transmittance of the entire diaphragm structure 22 is close to or Equal to 0 to achieve the purpose of power saving. When the pressure difference between the first transparent electrode layer 31 and the second transparent electrode layer 32 can be the aforementioned second voltage V2, the ink in the colored ink layer 3023 is pushed to the edge of the diaphragm structure 22, and the diaphragm structure 22 The aperture becomes larger.

It should be noted that FIG. 8b is an example in which the colored ink layer 3023 is disposed close to the first transparent electrode layer 31, and the electrolyte layer 3022 is disposed close to the second electrode 320. In other embodiments of the present application, the colored ink layer 3023 may be disposed close to the second electrode 320, and the electrolyte layer 3022 may be disposed close to the first transparent electrode layer 31.

In addition, in the embodiment of the present application, the color of the ink in the colored ink layer 3023 may be black, gray, etc. with good light-shielding performance, and the embodiment of the present application does not limit the color of the ink in the colored ink layer 3023.

It can be seen from the above that the material constituting the first transparent electrode layer 31 and the second transparent electrode layer 32 may be a thin film layer formed of a transparent conductive material. Therefore, the thickness of the first transparent electrode layer 31 and the second transparent electrode layer 32 can be made small. In addition, for any of the above-mentioned dimming layers 30, the thickness of the dimming layer 30 may be determined by the distance between the first lens 211 and the second lens 212 on the optical axis O-O.

In some embodiments of the present application, as shown in FIG. 4, the distance on the optical axis O-O between the first lens 211 and the second lens 212 is D12, and D12 may be ≤0.2 mm. In this case, the thickness of the diaphragm structure 22 (the sum of the thicknesses of the first transparent electrode layer 31, the second transparent electrode layer 32, and the dimming layer 30) between the first lens 211 and the second lens 212 may be less than Or equal to 0.2mm. Therefore, the size of the camera module 20 can be further reduced, and the total optical path length can be shortened.

For example, the thickness of the diaphragm structure 22 may be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, or 0.2 mm.

Example two

In addition, the second transparent electrode layer 32 in FIG. 5a may include a plurality of electrode groups 322 as shown in FIG. 9. The different electrode groups 322 are distributed from the inside to the outside. The circular solid line in FIG. 9 is not a physical structure, and the solid line is used to define two adjacent electrode groups 322.

On this basis, any one electrode group 322 includes a plurality of block-shaped second electrodes 320 with preset intervals. In addition, the plurality of block-shaped second electrodes 320 are distributed in a ring shape. Each electrode group 322 and the first transparent electrode layer 31 are used to form a peripheral dimming area on the dimming layer 30 in the above preset working state.

For example, in FIG. 9, the three electrode groups 322 arranged in order from the inside to the outside, and the first transparent electrode layer 31 in the above preset working state, respectively form as shown in FIG. 5c, and are arranged in order from the inside to the outside. The peripheral dimming area 201a, the peripheral dimming area 201b, and the peripheral dimming area 201c.

In this case, in order to enable the transmittance of different peripheral dimming regions to be individually adjusted, a certain gap is required between the two second electrodes 320 respectively located in the adjacent electrode groups 322. This application does not limit the size of the gap, as long as it can ensure that the electric field interference can be avoided between the second electrodes 320 of different electrode groups 322.

In addition, since one electrode group 322 and the first transparent electrode layer 31 are used in the preset working state to form a peripheral dimming area on the dimming layer 30, the voltage of each second electrode 320 in the same electrode group 322 can be the same . Therefore, the present application does not limit the distance between two adjacent second electrodes 320 in the same electrode group 322, that is, the aforementioned predetermined distance.

In the embodiment of the present application, a plurality of second electrodes 320 in different electrode groups 322 arranged in order from the inside to the outside may be located on the same straight line, or may not be on the same straight line. This application does not limit this.

It should be noted that in this example, when multiple second electrodes 320 in the same electrode group 322 are connected to each other, a ring-shaped second electrode 320 as shown in FIG. 6a can be formed in Example 1.

Based on this, the dimming layer 30 may be the liquid crystal layer. In this case, only the liquid crystal molecules in the liquid crystal layer located between the second electrode 320 and the first transparent electrode layer 31 can be flipped under the control of the second electrode 320 and the first transparent electrode layer 31 to achieve Adjustment of transmittance. Therefore, the greater the density of the second electrode 320 in the same electrode group 322, the larger the area of the peripheral dimming area formed on the dimming layer 30 under the preset working state of the electrode group 322 and the first transparent electrode layer 31 .

In addition, the above-mentioned dimming layer 30 may further include a colored ink layer 3023 and an electrolyte layer 3022. Alternatively, the above-mentioned dimming layer 30 may also be PDLC.

In this case, when a voltage is applied to the second electrode 320 in the same electrode group 322, in some possible implementations of the present application, the same voltage may be applied to the second electrode 320 in the same electrode group 322 to The voltage difference between the first transparent electrode layer 31 and each second electrode 320 in the same electrode group 322 can be the above-mentioned second voltage V2, for example, V2=30V.

Alternatively, in other possible implementations of the present application, the voltage of each second electrode 320 in the same electrode group 322 can also be individually controlled, so that the first transparent electrode layer 31 is different from the second electrode in the same electrode group 322. For the voltage difference of 320, different values are selected within the range of |V2|<30V and are non-zero values, so as to adjust the transmittance percentage of each peripheral dimming area 201. The specific adjustment process is described in the same industry and will not be repeated here.

Example three

In this example, as shown in FIG. 10, the first transparent electrode layer 31 and the second transparent electrode layer 32 may be a whole thin film layer covering the dimming layer 30. Both the first transparent electrode layer 31 and the second transparent electrode layer 32 may be circular.

In this case, the above-mentioned dimming layer 30 includes a colored ink layer 3023 and an electrolyte layer 3022. The colored ink layer 3023 and the electrolyte layer 3022 can be sealed in the containing cavity formed by the first retaining wall 33 and the first lens 211 and the second lens 212.

Based on this, when different voltages are applied to the second transparent electrode layer 32, the electric field generated between the first transparent electrode layer 31 and the second transparent electrode layer 32 pushes the ink in the colored ink layer 3023 to the first lens 211. During the movement between the second lenses 212, the colored ink layer 3023 can have different light transmission areas, so as to achieve the purpose of adjusting the aperture.

For example, when a voltage is applied to the first transparent electrode layer 31 and the second transparent electrode layer 32 so that the voltage difference between the first transparent electrode layer 31 and the second transparent electrode layer 32 is the first voltage V1=0, the colored ink The ink in the layer 3023 is pushed to the edge of the diaphragm structure 22. As shown in FIG. 8c, the area of the central dimming zone 200 is much larger than the area of the peripheral dimming zone 201. Moreover, the central dimming area 200 is transparent because it is not covered by ink, and its light transmittance is the largest. At this time, the diaphragm structure 22 may have a large aperture.

When the voltage applied to the first transparent electrode layer 31 and the second transparent electrode layer 32 is adjusted so that the voltage difference between the first transparent electrode layer 31 and the second transparent electrode layer 32 can be the above-mentioned second voltage V2, for example V2=30V, the ink at the edge of the diaphragm structure 22 gradually moves to the center of the diaphragm structure 22, so that the area of the central dimming area 200 is reduced as shown in FIG. 8d, while the peripheral dimming area 201 The area increases. At this time, the diaphragm structure 22 may have a small aperture.

In some other possible implementations of the present application, when the voltage difference between the first transparent electrode layer 31 and the second transparent electrode layer 32 can be the above-mentioned first voltage V1=0V, the colored ink layer 3023 is evenly dispersed In each dimming zone. When the pressure difference between the first transparent electrode layer 31 and the second transparent electrode layer 32 can be the aforementioned second voltage V2, the ink in the colored ink layer 3023 is pushed to the edge of the diaphragm structure 22, and the diaphragm structure 22 The aperture becomes larger.

Based on this, for the camera module 20 having any one of the diaphragm structures 22 described in Example 1, Example 2, and Example 3, the camera module 20 further includes a lens barrel 41 and a lens motor 42 as shown in FIG. And module circuit board 43. In addition, in order to provide voltage to the respective second electrodes 320 in the first transparent electrode layer 31 and the second transparent electrode layer 32 in the diaphragm structure 22. The aforementioned camera module 20 may further include a first electronic control pin 51 as shown in FIG. 12a and a second electronic control pin 52 as shown in FIG. 12b.

The first electronic control pin 51 may be disposed on a surface of the first lens 211 facing the second lens 212. The first electrical control pin 51 is electrically connected to the first transparent electrode layer 31. Therefore, a voltage is provided to the first transparent electrode layer 31 through the first electronic control pin 51. A plurality of second electronic control pins 52 are arranged on a side surface of the second lens 212 facing the first lens 211. Each second electronic control pin 52 is electrically connected to the second electrode 320. Therefore, a voltage can be provided to at least one second electrode 320 in a dimming area through a second electronic control pin 52.

In addition, the aforementioned lens assembly 21 may be mounted on the lens barrel 41. The lens barrel 41 includes a lens barrel body for supporting the lens in the lens assembly 21. In addition, the lens barrel 41 may also include an embedded metal circuit 410 embedded in the lens barrel body, as shown in FIG. 11. The above-mentioned first electric control pin 51 and the second electric control pin 52 are electrically connected to the embedded metal circuit 410 in the lens barrel 41.

On this basis, the lens motor 42 in FIG. 11 and the embedded metal circuit 410 of the lens barrel 41 can be electrically connected. When the aforementioned lens assembly 21 further includes a plurality of lenses arranged on the image side of the second lens 212, the lens motor 42 can be used to drive the lenses in the lens assembly 21. For example, the remaining lenses arranged on the image side of the second lens 212 are relatively The second lens 212 moves.

In some embodiments of the application, the aforementioned lens motor 42 may have any one of functions of auto focus (AF) and optical image stabilization (OIS).

In addition, the above-mentioned module circuit board 43 may include a power supply circuit 430 as shown in FIG. 13. The power supply circuit 430 can be electrically connected to the lens motor 42 for supplying power to the lens motor 42. In this case, the power supply circuit 430 can also provide a voltage to the first electronic control pin 51 through the lens motor 42 and the embedded metal circuit 410 of the lens barrel 41, so as to provide a voltage to the first transparent electrode through the first power supply pin 51. Layer 31 is charged. In addition, the power supply circuit 430 can also provide voltage to the second electronic control pin 52 through the lens motor 42 and the embedded metal circuit 410 of the lens barrel 41, so as to provide the second electrode 320 through different second power supply pins 52. Charge it.

In addition, in order to collect the light passing through the lens assembly 21 to realize imaging. The module circuit board 43 also includes a photosensitive element 44 (also called an image chip) as shown in FIG. 11 and an image processing circuit 431 as shown in FIG. 13. The photosensitive element 44 is electrically connected to the image processing circuit 431. The photosensitive element 44 can be used to photoelectrically convert the light transmitted through the lens assembly 21 to generate a digital image (also called image data), and transmit it to the image processing circuit 431 , In order to process the image data or take the image by the image processing circuit 431.

It should be noted that the above-mentioned photosensitive element 44 may be a charge coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

Based on this, as shown in FIG. 2a, when the surface of the middle frame 11 facing the rear housing 12 is provided with a motherboard, such as a printed circuit board (PCB), the module circuit board 43 can be electrically connected to the motherboard. The driving circuit in the display screen 10 may pass through the middle frame 11 through a flexible printed circuit (FPC), and then be electrically connected to the main board on the middle frame 11, so that the picture taken by the camera module 20 can be transmitted to the display Screen 10 displays.

In addition, in order to protect the photosensitive element 44 and enable a certain distance between the photosensitive element 44 and the lens assembly 21 for imaging, the aforementioned camera module 20 further includes as shown in FIG. 11, which is located between the lens assembly 21 and the photosensitive element. 44 between the module base 46.

In this case, in order to electrically connect the power supply circuit 430 on the module circuit board 43 and the motor 42, the module base 46 is provided with a buried circuit (not shown in the figure). Thus, the power supply circuit 430 and the motor 42 are electrically connected through the above-mentioned circuit buried wire.

In addition, in order to filter out the part of the light passing through the lens assembly 21 that is unfavorable for imaging, such as infrared light. The camera module 20 also includes a filter 45 on the image side of the lens assembly 21 as shown in FIG. 11. In order to fix the filter 45, the module base 46 is provided with a through hole 460 at a position corresponding to the lens assembly 21, and the filter 45 is fixed in the through hole 460.

The following is an example of how the lens assembly 21 is set.

Example four

In this example, as shown in FIG. 14a, the lens assembly 21 includes seven lenses, that is, in addition to the first lens 211 and the second lens 212, the lens assembly 21 also includes the second lens as shown in FIG. 14a. The third lens 213, the fourth lens 214, the fifth lens 215, the sixth lens 216, and the seventh lens 217 are located on the same optical axis as the second lens 212 on the image side.

Wherein, the third lens 213 may have a negative refractive power, thereby helping to correct the curvature of field of the lens assembly 21, so that the imaging surface of the lens assembly 21 is flatter. The fourth lens 214 may have a positive refractive power, so as to disperse the light converging ability at the object side end of the fourth lens 214, so as to avoid excessive refractive power of the first lens 211, which may cause excessive aberrations in the lens assembly 21.

In addition, the fifth lens 215 may have refractive power, the object side (left) surface may be concave, and the image side (right) surface may be convex, thereby helping to increase the symmetry of the lens assembly 21 and reduce its sensitivity. Enhance the imaging quality.

The sixth lens 216 may have refractive power, and its object side (left side) surface and image side (right side) surface may both be aspheric (ASP). The aspheric surface can make the lens easy to fabricate into a shape other than a spherical surface, and obtain more control variables to reduce aberrations, thereby reducing the number of lenses required, and thus can effectively reduce the total optical length. In addition, at least one of the object side (left side) surface and the image side (right side) surface of the sixth lens 216 may have at least one inflection point. This inflection point helps to further correct the off-axis aberration of the lens assembly 21.

The seventh lens 217 may have refractive power, and its object side (left side) surface and image side (right side) surface may both be aspherical, and the object side (left side) surface and image side (right side) surface of the seventh lens 217 ) At least one of the surfaces may have at least one inflection point. The technical effects of the aspheric surface and the inflection point are the same as described above, and will not be repeated here.

In addition, the aforementioned lens assembly 21 may satisfy the following conditions: 0.6<|f1/f|<1.2; |f6/f|>1.0; |f7/f|>1.0. Among them, f is the focal length of the lens assembly 21. f1 is the focal length of the first lens 211, f6 is the focal length of the sixth lens 216, and f7 is the focal length of the seventh lens 217. Among them, the unit of focal length is millimeter (mm).

In this way, by setting the ratio of the focal length f1 of the first lens 211 to the focal length f of the lens assembly to satisfy 0.6<|f1/f|<1.2, the ratio of the focal length f6 of the sixth lens 216 to the focal length f of the lens assembly is set to satisfy |f6/f|>1.0, set the ratio of the focal length f7 of the seventh lens 217 to the focal length f of the lens assembly to satisfy |f7/f|>1.0, which helps to control the main refractive power of the lens assembly 21 at the first lens 211 , And far away from the sixth lens 216 and the seventh lens 217, can make the lens assembly 21 have sufficient light converging ability at the object side end, which helps to shorten the total length and maintain the miniaturization of the lens assembly 21.

In addition, the lens assembly 21 satisfies the following conditions: D23≤0.15mm; 0<D12/D34<0.3; 0<D23/D34<0.3.

Among them, D12 is the distance between the first lens 211 and the second lens 212 on the optical axis O-O. D23 is the distance on the optical axis O-O between the second lens 212 and the third lens 213. D34 is the distance between the third lens 213 and the fourth lens 214 on the optical axis O-O. In this way, by limiting the air gap between the first three lenses in the lens assembly 21, namely the first lens 211, the second lens 212, and the third lens 213 (that is, the distance between the two lenses on the optical axis OO), the It is advantageous to make the lens that provides the main refractive power in the lens assembly 21 close to the diaphragm structure 22, thereby facilitating aberration correction and shortening the total system length of the lens assembly 21.

It can be seen from the above that when the diaphragm structure 22 is shown in FIG. 7b, the central dimming area 200 is in a transparent state, and the light transmittance in the peripheral dimming area 201a, the peripheral dimming area 201b, and the peripheral dimming area 201c is relative to the center When the light transmittance of the dimming zone 200 is close to or the same, the aperture of the camera module 20 may be the maximum aperture, for example, Fno=1.4. In this case, as shown in FIG. 14b, more light from outside can enter the lens assembly 21 and pass through each lens in the lens assembly 21 to form an image on the imaging surface 220.

Or, when the diaphragm structure 22 is shown in FIG. 7c, the central dimming area 200 is in a transparent state, and the light transmittance in the peripheral dimming area 201a, the peripheral dimming area 201b, and the peripheral dimming area 201c is close to or equal to 0 At this time, the aperture of the camera module 20 may be the smallest aperture, for example, Fno=6. In this case, as shown in FIG. 14c, light from the outside world can enter the lens assembly 21 and pass through each lens in the lens assembly 21 to form an image on the imaging surface 220.

The parameters of each lens in the lens assembly 21 shown in FIG. 14a are described below with examples. The detailed parameter settings are shown in Table 1 and Table 2.

Table 1

Among them, the above Table 1 is the structure data of the lens assembly 21, wherein the units of the radius of curvature, thickness, and focal length are millimeters (mm). The surface code of the lens in Table 1 is shown in Figure 14a.

It should be noted that in FIG. 14a, only the surface of each lens in the lens assembly 21 in Table 1 is marked, and the remaining surfaces, such as the surface S0 of the object, the surface S3 where the diaphragm structure is located, and the surface S15 where the filter is located. , And the imaging surfaces S17 and S18 are not labeled in Fig. 14a.

Table 2

Among them, Table 2 is the aspheric surface data of each surface in the lens assembly 21, where k is the conical surface coefficient, and A4 to A16 are the 4th to 16th order aspheric surface coefficients.

Example 5

In this example, as shown in FIG. 15, the lens assembly 21 includes eight lenses, that is, in addition to the first lens 211 and the second lens 212, the lens assembly 21 also includes the image side of the second lens 212 (right side). ), and the third lens 213, the fourth lens 214, the fifth lens 215, the sixth lens 216, the seventh lens 217, and the eighth lens 218 are located on the same optical axis OO as the second lens 212.

Wherein, the third lens 213 may have a negative refractive power. The fourth lens 214 may have positive refractive power. The fifth lens 215 has refractive power, and its object side (left side) surface may be a concave surface, and the image side (right side) surface may be a convex surface. The setting methods and technical effects of the third lens 213, the fourth lens 214, and the fifth lens 215 are the same as those in Example 4, and will not be repeated here.

In addition, the sixth lens element 216 may have a negative refractive power, and its object side (left side) surface may be a concave surface, and the image side (right side) surface may be a convex surface. In this way, it helps to increase the symmetry of the lens assembly 21 to reduce sensitivity and improve imaging quality.

The seventh lens 217 may have positive refractive power, and its object side (left side) surface and image side (right side) surface may both be aspherical. In this way, the seventh lens 217 has a positive refractive power and can be used with the sixth lens 216 to further reduce the aberration of the lens assembly 21.

The eighth lens 218 may have refractive power, both the object side (left side) surface and the image side (right side) surface thereof may be aspherical, and at least one surface of the eighth lens 218 has at least one inflection point. The technical effects of the aspheric surface and the inflection point are the same as in Example 4, and will not be repeated here.

In addition, the aforementioned lens assembly 21 may satisfy the following conditions: 0.7<|f1/f|<1.3; 0.6<|f7/f|<1.0; 0.5<|f8/f|<0.9. Among them, f is the focal length of the lens assembly 21. f1 is the focal length of the first lens 211, and f7 is the focal length of the seventh lens 217. f8 is the focal length of the eighth lens 218. Among them, the unit of focal length is millimeter (mm).

In this way, by setting the ratio of the focal length f1 of the first lens 211 to the focal length f of the lens assembly to satisfy 0.7<|f1/f|<1.3, it helps to ensure that the lens assembly 21 is located on the object side of the lens assembly 21. One lens, that is, the first lens 211 has sufficient refractive power, which can make the object side end of the lens assembly 21 have sufficient light converging ability, which helps to shorten the total system length of the lens assembly 21, so that the lens assembly 21 can be miniaturized. setting. In addition, the ratio of the focal length f7 of the seventh lens 217 to the focal length f of the lens assembly is set to satisfy 0.6<|f7/f|<1.0, and the ratio of the focal length f8 of the eighth lens 218 to the focal length f of the lens assembly is set to satisfy 0.5<| f8/f|<0.9, which is also conducive to shortening the total system length of the lens assembly 21.

In addition, the lens assembly 21 in this example satisfies the following conditions: D23≤0.15mm; 0<D12/D34<0.3; 0<D23/D34<0.3. The technical effects of the lens assembly 21 meeting the above conditions are the same as those described above, and will not be repeated here.

The parameters of each lens in the lens assembly 21 shown in FIG. 15 are described below with examples. The detailed parameter settings are shown in Table 3 and Table 4.

table 3

Among them, the above Table 3 is the structure data of the lens assembly 21, in which the units of the radius of curvature, thickness, and focal length are millimeters (mm). The surface code of the lens in Table 3 is shown in Figure 15.

It should be noted that only the surface of each lens in the lens assembly 21 in Table 3 is marked in FIG. 15, and the remaining surfaces, such as the surface S0 of the object, the surface S3 where the diaphragm structure is located, and the surface S18 where the filter is located , And the imaging surfaces S19 and S20 are not labeled in FIG. 15.

Table 4

Among them, Table 4 is the aspheric surface data of each surface in the lens assembly 21, where k is the conical surface coefficient, and A4 to A16 are the 4th to 16th order aspheric surface coefficients.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any change or replacement within the technical scope disclosed in this application shall be covered by the protection scope of this application . Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A camera module, characterized by comprising:

The lens assembly includes a first lens and a second lens located on the same optical axis;

The diaphragm structure is located between the first lens and the second lens; the diaphragm structure includes: a first transparent electrode layer, a second transparent electrode layer, and a first transparent electrode layer and a second transparent electrode layer; The dimming layer between the two transparent electrode layers;

The first transparent electrode layer and the second transparent electrode layer are used for forming a plurality of dimming areas on the dimming layer in a preset working state; the plurality of dimming areas includes a central dimming area , And at least one peripheral dimming zone located outside the central dimming zone.
The camera module according to claim 1, wherein:

The first transparent electrode layer covers the dimming layer;

The second transparent electrode layer includes a plurality of second electrodes arranged at intervals; any one of the second electrodes has a ring structure; and the plurality of second electrodes are arranged sequentially from the inside to the outside.
4. The camera module of claim 2, wherein the plurality of second electrodes have a common center; the center of the second electrode is on the optical axis of the first lens and the second lens.
The camera module according to claim 1, wherein:

The first transparent electrode layer covers the dimming layer;

The second transparent electrode layer includes a plurality of electrode groups; any one electrode group includes a plurality of block-shaped second electrodes with a preset interval, and the plurality of block-shaped second electrodes are distributed in a ring shape; The electrode group is distributed from the inside to the outside.
The camera module according to any one of claims 2-4, wherein:

The dimming layer is a liquid crystal layer;

The camera module further includes a first retaining wall arranged around the periphery of the dimming layer; the first retaining wall, the first lens and the second lens are formed to accommodate the dimming layer Containing cavity.
The camera module according to claim 2, wherein:

The camera module further includes a plurality of second retaining walls with a circular ring structure; each of the second retaining walls is located between two adjacent second electrodes, and the second retaining wall is connected to the first transparent The electrode layers are in contact;

The dimming layer includes an electrochromic layer and an electrolyte layer located between the first transparent electrode layer and the second electrode.
4. The camera module of claim 1, wherein the first transparent electrode layer and the second transparent electrode layer both cover the dimming layer; the first transparent electrode layer and the second transparent electrode layer The transparent electrode layers are all round.
The camera module of claim 2, 3, 4 or 7, wherein the dimming layer comprises a colored ink layer and an electrolyte layer;

The camera module further includes a first retaining wall arranged around the dimming layer; the first retaining wall, the first lens and the second lens form a receiving wall for accommodating the dimming layer Cavity.
The camera module according to any one of claims 2-4, wherein the camera module further comprises:

The first electronic control pin is arranged on the side surface of the first lens facing the second lens; the first electronic control pin is electrically connected to the first transparent electrode layer;

A plurality of second electric control pins; arranged on a side surface of the second lens facing the first lens; each of the second electric control pins is electrically connected to one of the second electrodes.
The camera module of claim 9, wherein the camera module further comprises:

The lens barrel; the lens assembly is mounted on the lens barrel; the lens barrel includes an embedded metal circuit; the first electronic control pin, the second electronic control pin and the embedded metal circuit connection;

A lens motor, electrically connected to the embedded metal circuit of the lens barrel, for driving the lens in the lens assembly to move;

The module circuit board includes a power supply circuit; the power supply circuit is electrically connected with the lens motor, and is used for supplying power to the lens motor.
The camera module of claim 1, wherein the distance on the optical axis between the first lens and the second lens is D12, D12≤0.2 mm.
The camera module according to claim 1, wherein:

The first lens has a positive refractive power, the object side surface of the first lens is a convex surface, and the surface close to the diaphragm structure is a flat surface;

The second lens has a negative refractive power, and the surface of the second lens close to the diaphragm structure is a plane.
The camera module according to claim 12, wherein the lens assembly further comprises a third lens, a fourth lens, and a third lens that are sequentially away from the image side of the second lens and are located on the same optical axis as the second lens. Lens, fifth lens, sixth lens, seventh lens;

The third lens has a negative refractive power;

The fourth lens has a positive refractive power;

The fifth lens has refractive power, the object side surface is concave, and the image side surface is convex;

The sixth lens element has refractive power, the object side surface and the image side surface thereof are both aspherical, and at least one of the object side surface and the image side surface of the sixth lens element has at least one inflection point;

The seventh lens has refractive power, the object side surface and the image side surface thereof are both aspherical, and at least one of the object side surface and the image side surface of the seventh lens has at least one inflection point;

The lens assembly meets the following conditions:

0.6<|f1/f|<1.2; |f6/f|>1.0; |f7/f|>1.0;

Wherein, f is the focal length of the lens assembly; f1 is the focal length of the first lens, f6 is the focal length of the sixth lens, and f7 is the focal length of the seventh lens.
The camera module according to claim 12, wherein the lens assembly further comprises a third lens, a fourth lens, and a third lens that are sequentially away from the image side of the second lens and are located on the same optical axis as the second lens. Lens, fifth lens, sixth lens, seventh lens, eighth lens;

The third lens has a negative refractive power;

The fourth lens has a positive refractive power;

The fifth lens has refractive power, the object side surface is concave, and the image side surface is convex;

The sixth lens has a negative refractive power, the object side surface is concave, and the image side surface is convex;

The seventh lens has a positive refractive power, and its object side surface and image side surface are both aspherical;

The eighth lens has refractive power, the object side surface and the image side surface are aspherical, and at least one surface of the eighth lens has at least one inflection point;

The lens assembly meets the following conditions:

0.7<|f1/f|<1.3; 0.6<|f7/f|<1.0; 0.5<|f8/f|<0.9;

Wherein, f is the focal length of the lens assembly; f1 is the focal length of the first lens; f7 is the focal length of the seventh lens, and f8 is the focal length of the eighth lens.
The camera module according to claim 13 or 14, wherein the lens assembly meets the following conditions:

D23≤0.15mm; 0<D12/D34<0.3; 0<D23/D34<0.3;

Wherein, D12 is the distance on the optical axis between the first lens and the second lens; D23 is the distance on the optical axis between the second lens and the third lens; D34 is the distance on the optical axis between the The distance on the optical axis between the third lens and the fourth lens.
An electronic device, characterized by comprising a display screen, and the camera module according to any one of claims 1-15;

The display screen has a display surface and a back surface away from the display screen; the camera module is located on the back of the display screen;

Alternatively, a mounting hole is opened on the display screen, and the camera module is located in the mounting hole.
The electronic device of claim 16, wherein the display screen further comprises a middle frame and a rear shell;

A surface of the middle frame away from the rear case is connected to the display screen; the surface of the middle frame facing the rear case is provided with a main board;

The camera module includes a module circuit board, and the module circuit board is electrically connected to the main board.