CN110609377A

CN110609377A - Lens group, camera module and electronic equipment

Info

Publication number: CN110609377A
Application number: CN201910973658.3A
Authority: CN
Inventors: 陈伟
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2019-12-24

Abstract

The application relates to a lens group, a camera module and an electronic device, wherein the lens group comprises a lens base, a prism, a liquid lens and a lens group, the prism is arranged in the lens base along the optical axis direction of the lens group, and external light can enter the prism from a light-entering part to form emergent light by reflection of the prism, and the prism can move relative to the lens group and enable the emergent light to move along a first direction perpendicular to the optical axis or deflect relative to the optical axis of the lens group around the first direction; the liquid lens is arranged between the prism and the lens group along the extending direction of the optical axis of the lens group and is used for adjusting the direction of emergent rays entering the lens group. The application discloses lens group, camera module and electronic equipment utilizes liquid lens and prism adjustment light direction of propagation in order to adapt to focusing or anti-shake's needs. Prism and liquid camera lens can adjust luminance respectively to can obtain more quick dimming effect, the liquid camera lens is adjusted luminance the in-process and is need not whole emergence and remove, thereby makes the overall structure of camera lens more miniaturized.

Description

Lens group, camera module and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to a lens group, a camera module and electronic equipment.

Background

As a common function of electronic devices such as mobile phones and tablet computers, users have higher and higher requirements for the quality of shot pictures, so that the anti-shake and auto-focus design of the electronic devices during shooting becomes more important.

The switching of near focus and far focus is realized through the removal of camera lens to traditional camera module, and along with the increase of the size of the optical sensor who is used for the formation of image, the size of camera lens also increases thereupon, leads to camera module bulky, influences electronic equipment's frivolous design, and the urgent need develops the small and exquisite and better camera module of focusing effect of structure.

Disclosure of Invention

The embodiment of the application provides a lens group with small structure and better dimming effect, a camera module and an electronic device comprising the camera module.

In one aspect, the present application provides a lens group comprising:

a lens base having a light incident portion;

the lens group is arranged in the lens base;

the prism is arranged in the lens base along the optical axis direction of the lens group, external light can enter the prism from the light incoming part to form emergent light through the prism, the prism can move relative to the lens group and enable the emergent light to move along a first direction or deflect relative to the optical axis of the lens group around the first direction, and the first direction is perpendicular to the optical axis; and

and the liquid lens is arranged between the prism and the lens group along the extending direction of the optical axis of the lens group and is used for adjusting the direction of the emergent ray entering the lens group.

In one embodiment, the prism is movable relative to the base in the direction of the optical axis, or the prism is movable in the first direction.

In one embodiment, the prism is rotatably connected to the lens holder through a rotating shaft, and the rotating shaft is perpendicular to the optical axis of the lens group.

In one embodiment, the prism is slidable along the rotation axis.

In one embodiment, the liquid lens includes a closed bag body and liquid filled in the closed bag body, light can penetrate through the liquid from one side of the closed bag body along the optical axis direction and can be emitted from the other side of the closed bag body, and a squeezing structure is arranged in the lens base and can squeeze the closed bag body and enable the closed bag body and the liquid to be deformed.

In one embodiment, the surface of the closed capsule for light to enter the liquid defines a light incident surface, the surface of the closed capsule for light to exit defines a light exiting surface, the light incident surface is located on a side away from the lens assembly, the light exiting surface is located on a side facing the lens assembly, at least one of the light incident surface and the light exiting surface is a convex surface, and the liquid lens can change the curvature radius of the convex surface under the extrusion of the extrusion structure.

In one embodiment, the squeezing structure comprises a magnet, a squeezing seat and a coil, the magnet is fixed on the inner wall of the lens seat, the squeezing seat is connected with the lens seat through an elastic sheet, the coil is connected with the squeezing seat, and the coil can drive the squeezing seat to move relative to the lens seat under the action of a magnetic field of the magnet when being electrified so that the squeezing seat squeezes the closed capsule body.

In one embodiment, the liquid lens includes a sealed cavity, and a conductive fluid and an insulating fluid filled in the sealed cavity, the conductive fluid and the insulating fluid are immiscible and separated by an interface therebetween, refractive indexes of the conductive fluid and the insulating fluid are different, and the emergent light can be refracted at the interface and then incident to the lens group; an electrode group is arranged in the lens base and used for adjusting a contact angle between the interface and the side wall of the closed cavity when the electrode group is electrified so as to change the shape of the interface.

On the other hand, this application provides a camera module, including optical sensor and foretell lens group, optical sensor follows the optical axis direction of lens group sets up the distance of lens group one side that liquid lens is far away, optical sensor has the sensitization district, the sensitization district can receive shining and formation of image of the emergent ray of lens group.

In another aspect, the present application provides an electronic device including the camera module.

The application discloses lens group, camera module and electronic equipment, lens group include the microscope base and set up prism, liquid lens and the battery of lens in the microscope base, utilize liquid lens and prism adjustment light direction of propagation in order to adapt to focusing or the needs of anti-shake. Prism and liquid camera lens can adjust luminance respectively to can obtain more quick dimming effect, the liquid camera lens is adjusted luminance the in-process and is need not whole emergence and remove, thereby makes the overall structure of camera lens more miniaturized.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of an electronic device according to an embodiment;

fig. 2 is a schematic structural diagram of a camera module according to an embodiment;

fig. 3 is a schematic structural diagram of a camera module according to another embodiment;

FIG. 4 is a schematic diagram of an embodiment of a camera module according to which light is incident on an optical sensor along an optical axis;

fig. 5 is a schematic view of the camera module shown in fig. 3, wherein an interface of the liquid lens is in a first state;

fig. 6 is a schematic view of the camera module shown in fig. 3, wherein the interface of the liquid lens is in a second state;

fig. 7 is a schematic view of the camera module shown in fig. 3, wherein the interface of the liquid lens is in a third state;

fig. 8 is a schematic view of the camera module shown in fig. 3, in which the interface of the liquid lens is in a fourth state.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The electronic device of this application embodiment, electronic device can be cell-phone, panel computer, notebook computer, intelligent bracelet, intelligent wrist-watch, intelligent helmet, intelligent glasses etc.. The embodiment of the present invention will be described by taking an example that the electronic device is a mobile phone, and it is understood that the specific form of the electronic device may be other, and is not limited herein.

Referring to fig. 1, the electronic device includes a main body 100 and a camera module 200, wherein the camera module 200 is disposed on the main body 100 and is used for capturing images.

The body 100 includes a housing 101 and a display 110 connected to the housing 101, wherein an accommodating space is formed between the housing 101 and the display 110, the accommodating space is used for accommodating internal parts of the electronic device, and the housing 101 can protect the internal parts of the electronic device. The housing 101 may be a rear cover of the electronic device and cover components such as a battery and a motherboard of the electronic device.

The camera module 200 can be installed on the housing 101, and when shooting is needed, the camera module 200 can receive external light to image.

As shown in fig. 2, the camera module 200 includes a lens group 210 for processing light and a light sensor 220 for receiving the light processed by the lens group 210 for imaging. The photosensor 220 has a photosensitive area 220a, and the photosensitive area 220a can generate photoelectric effect when being irradiated by light to perform imaging. Types of the light sensor 220 may include a CCD (charge coupled) element, a CMOS (complementary metal oxide conductor) device, a photodiode, and the like. The light sensor 220 may be a color light sensor, a monochromatic light sensor, an infrared light sensor, a gray sensor, and the like, divided from colors.

The camera module 200 has an imaging axis defined by the internal optics of the lens group 210.

In some embodiments, as shown in conjunction with FIG. 2, lens group 210 includes a prism 211, a lens group 212, a liquid lens 223, and a lens mount 216.

Referring to fig. 2, the prism 211, the liquid lens 223, and the lens group 212 are disposed in the lens holder 216 along the imaging optical axis. The lens holder 216 has a light incident portion 216a for allowing external light to enter the lens holder 216 and enter the optical sensor 220 under the optical adjustment of the optical elements inside the lens holder 216. The light incident portion 216a may be formed by forming a hole at a corresponding position on the mirror base 216, or may be formed by attaching a lens or a light transmitting member such as glass or plastic at a corresponding position on the mirror base 216. The structure of the light incident portion 216a is not limited herein, and only needs to satisfy the requirement that the external light enters the lens group 210 from the light incident portion 216a and is incident on the prism 211.

Since the propagation direction of the light passing through the prism 211 is changed due to the reflection of the prism 211, the forming optical axis can be divided into a first optical axis 200a before entering the prism 211 and a second optical axis 200b defined by the propagation direction of the outgoing light after reflection, the light emitted from the prism 211 passes through the liquid lens 223 and the lens group 212 and enters the optical sensor 220, and it can be considered that the optical axis of the lens group 212 is coaxial with the second optical axis 200b, that is, the optical axis of the lens group 212 defines the propagation direction of the optical path from the prism 211 to the lens group 212 in the imaging optical axis.

After the optical device inside the lens group 210 and the optical sensor 220 are assembled to form the camera module 200 according to the requirement of the light path, when the camera module 200 takes a picture, the external light enters the photosensitive area 220a of the optical sensor 220 along the direction of the imaging optical axis of the camera module 200, so that the photosensitive area 220a is illuminated by the light to form an image.

It should be particularly noted that "along the imaging optical axis of the camera module 200" does not mean that the propagation direction of all the light rays incident on the optical sensor 220 is completely coincident with or parallel to the direction of the imaging optical axis. For example, referring to fig. 4, some of the light rays incident on the optical sensor 220 along the second optical axis 200b are coincident with or parallel to the second optical axis 200b, and some of the light rays are at a certain angle with respect to the second optical axis 200b, as long as the light rays can enter the camera module 200 and irradiate the photosensitive area 220a of the optical sensor 220 to meet the imaging requirement of the optical sensor 220.

In some embodiments, the camera module 200 may be fixedly disposed in the housing 101, and a light-transmitting part or a light-transmitting area is disposed on the housing 101, so that light outside the housing 101 can be incident on the camera module 200, thereby meeting the shooting requirements of the camera module 200. The light-transmitting component may be transparent plastic or transparent glass, the casing 101 may also be partially made of a transparent material to form a light-transmitting region, or may be made of a light-transmitting material, so that light can penetrate into the electronic device from the outside and enter the light-incident surface 201 of the camera module 200, so as to meet the shooting requirement of the camera module 200.

In other embodiments, the camera module 200 may also be movably disposed on the body 100. For example, the main body 100 is provided with an accommodating groove for accommodating the camera module 200, the camera module 200 moves relative to the main body 100 and can be selectively located in an accommodating state and an extending state, in the accommodating state, the camera module 200 is located in the accommodating groove, and the camera module 200 at this time is shielded by the casing 101 on the periphery of the main body 100, so that the camera module 200 is prevented from being exposed to damage the overall appearance of the electronic device. In the extended state, the camera module 200 extends out of the accommodating groove, so that external light can enter the camera module 200 through the imaging optical axis of the camera module 200, and the imaging requirement of the camera module 200 is met.

It should be noted that the camera module 200 can be used as a front camera. For example, in the electronic device shown in fig. 1, the light incident surface 201 of the camera module 200 is exposed at a side of the display area 110a of the display screen 110, and the external light can enter the light incident surface 201 along the first optical axis 200 a. As shown in fig. 2 to 4, under the reflection of the prism 211, the light beam enters the light sensor 220 along the second optical axis 200b through the liquid lens 223 and the lens group 212. In other embodiments, the arrangement position of the camera module 200 in the body 100 is adapted to be adjusted, so that the light incident surface 201 faces away from one side of the displayable region 110a of the display screen 110, that is, the camera module 200 can be used for rear-end shooting, and the shooting angle of the camera module 200 relative to the body 100 is not limited herein.

The structure of the lens group 210 will be further described with reference to fig. 2.

The optical axis of the lens group 212 and the second optical axis 200b in the imaging optical axis are coaxially arranged, the prism 211 is used as an optical device for dividing the imaging optical axis into a first optical axis 200a before incidence and a second optical axis 200b after incidence, the prism 211 is arranged in the imaging optical axis, specifically, the prism 211 is arranged in the lens base 216 along the optical axis direction of the lens group 212, meanwhile, in order to meet the requirement of optical processing on external light, the arrangement position of the prism 211 in the lens base 216 can enable the external light to enter the prism 211 from the light entering part 216a so as to be reflected by the prism 211 to form emergent light. It will be appreciated that the outgoing light rays enter the light sensor 220 through the liquid lens and the lens group 212 substantially along the second optical axis 200 b.

In some embodiments, the prism 211 can move relative to the lens group 212 and make the emergent light move along a first direction perpendicular to the optical axis (i.e. the X direction shown in fig. 2 and 3) or deflect around the optical axis of the lens group 210, so that the imaging field of view obtained by the optical sensor 220 via the lens group 210 changes, and the change can be used to compensate the image shake caused by vibration and other factors when the camera module 200 shoots, so that the image is clear and meets the requirement of optical anti-shake.

The liquid lens 223 is disposed between the prism 211 and the lens group 212 along an extending direction of an optical axis of the lens group 212, and is used for adjusting a direction of the emergent light entering the lens group 212. Such adjustment of the emergent light rays of the liquid lens 223 and the prism 211 can be performed simultaneously, thereby effectively improving the overall dimming efficiency of the lens group 210. Meanwhile, the dimming mode of the liquid lens 223 is different from the adjusting mode of the prism 211, so that the lens group 210 can adapt to various dimming requirements. For example, under the parallel effect of the prism 211 on the outgoing light along the first direction, the liquid lens 223 can adapt to perform convergence or divergence on the outgoing light to different degrees, so that the light finally outgoing through the lens group 212 enters the photosensitive area 220a of the optical sensor 220 to obtain a better imaging effect.

The prism 211 may be adapted to adjust the outgoing light by various configurations.

In some embodiments, the prism 211 can move relative to the lens group 212 along the optical axis of the lens group 212, that is, the prism 211 can move closer to or farther from the lens group 212 along the second optical axis 200b, so that the field of view obtained by the light sensor 220 through the prism 211 also moves, and the scanning effect is achieved.

The prism 211 is movable in a first direction, i.e. the prism 211 is movable in the X-direction, so that the field of view of the light sensor 220 can be scanned in another dimension.

For convenience of understanding, referring to fig. 4, taking the photosensitive area 220a of the optical sensor 220 as a rectangle for example, when the light incident on the photosensitive area 220a moves along the X direction, the imaging field of view obtained by the optical sensor 220 will present the visual effect of scanning along the X direction; accordingly, when the light incident on the photosensitive area 220a moves in the Y direction, the imaging field of view obtained by the photosensor 220 will exhibit the visual effect of scanning in the Y direction. Thus, the movement or deflection of the outgoing light rays by the prism 211 enables the adjustment of the light rays entering the photosensitive area 220a, so that the photosensor 220 can acquire different imaging fields of view. Based on this, when the camera module 200 generates image shake due to vibration, the image shake can be counteracted in a reverse adjustment manner, so that the image tends to be clear, and the anti-shake effect is realized.

In some embodiments, the prism 211 can perform the first direction moving operation on the outgoing light, and can also deflect the outgoing light in the first direction. It will be appreciated that as the prism 211 is moved, the outgoing light rays are translated in a first direction. When the prism 211 deflects the outgoing light around the first direction, that is, the outgoing light deflects around the X direction relative to the second optical axis 200b, and then the outgoing light will have the effect of moving and scanning the optical sensor 220 along the Y direction.

The prism 211 is rotatably connected to the mirror base 216 via a rotation axis 211a, and the rotation axis 211a is perpendicular to the optical axis of the lens group 212, that is, the rotation axis 211a is perpendicular to the second optical axis 200b, so that when the prism 211 rotates around the rotation axis 211a relative to the mirror base 216, the emergent light reflected by the prism 211 is deflected around the rotation axis 211a relative to the second optical axis 200b, thereby enabling the optical sensor 220 to obtain different imaging visual fields. Accordingly, when the camera module 200 is used for shooting, if the optical sensor 220 forms an image of a vibrating factor to generate image shake, the image can be corrected by the deflection of the emergent light rays through the prism 211, so that the anti-shake effect is realized.

Further, the prism 211 is slidable along the rotation shaft 211 a. That is to say, the prism 211 can rotate around the rotation axis 211a relative to the lens holder 216 to generate a deflection effect on the outgoing light, and the prism 211 can slide along the rotation axis 211a, so that the outgoing light can move along the direction of the rotation axis 211a, and further, with the adoption of the structure, the prism 211 can adapt to the adjustment of the outgoing light in two dimensions of X-Y, that is, the view field captured by the light sensing area 220a of the optical sensor 220 can move in two dimensions of X-Y, so as to enhance the anti-shake effect of the camera module 200, specifically, the camera module 200 configured with the lens group 210 can not only adapt to the anti-shake requirement of image shake in the X direction, but also adapt to the anti-shake requirement of image shake in the Y direction.

In some embodiments, the electronic device further includes a detection module for detecting shake information of the camera module 200, and a driving module for adjusting and controlling a state of the liquid lens 223 according to the shake information, so that the emergent light adjusted by the liquid lens 223 is diverged or converged or shifted to different degrees.

It should be noted that in some embodiments, the liquid lens 223 may perform dimming by using a squeezing manner, and in other embodiments, dimming may also be performed by using a liquid level shape change inside the liquid lens. The liquid lens with different structural forms has different dimming forms, and the driving module has different control forms on the liquid lens.

The following further explains the squeeze type liquid lens 223 and the adjustment of the liquid surface shape change inside the liquid lens, respectively, as examples.

In some embodiments, referring to fig. 2, the liquid lens 223 includes a closed capsule 223a and a liquid 223b filling the closed capsule 223a, and light can penetrate the liquid 223b from one side of the closed capsule 223a and exit from the other side, and the closed capsule 223a can deform together with the liquid 223b when being squeezed, so as to adjust the direction of the exiting light, so as to meet the requirements of focusing and anti-shake.

In some embodiments, the sealing capsule 223a is flat, so that the thickness is thinner along the optical axis of the lens set 212, and a sufficient light receiving surface can be obtained in the direction perpendicular to the optical axis of the lens set 212 to adapt to the requirement of adjusting the emergent light of the prism 211.

A pressing structure 224 is provided in the lens holder 216, and the pressing structure 224 can press the closed capsule 223a, so that the closed capsule 223a and the liquid 223b are deformed.

The liquid lens 223 may be a convex lens in its overall shape, and has a certain light condensing effect on light.

The surface of the closed capsule 223a for light to enter the liquid 223b defines a light incident surface 2231, the surface of the closed capsule 223a for light to exit defines a light emitting surface 2232, the light incident surface 2231 is located on a side away from the lens assembly 212, the light emitting surface 2232 is located on a side facing the lens assembly 212, and at least one of the light incident surface 2231 and the light emitting surface 2232 is a convex surface, so that a convex surface is used to construct a convex lens to generate a converging effect on the exiting light.

Taking the structure of the camera module 200 shown in fig. 2 as an example, the light-emitting surface 2232 is a convex surface.

In another embodiment, the light incident surface 2231 and the light emitting surface 2232 are both convex surfaces, i.e., the liquid lens 223 has a lenticular shape. Of course, in other embodiments, only the light incident surface 2231 is a convex surface, and the light emitting surface 2232 is a plane surface, which can also have a better light-focusing effect on light.

In short, at least one of the light incident surface 2231 and the light emitting surface 2232 of the liquid lens 223 is a convex surface, so as to perform a dimming effect on the emergent light of the prism 211. It should be particularly pointed out here that, no matter whether the light incident surface 2231 or the light emitting surface 2232 is a convex surface, the direction of the emergent light ray is changed by squeezing and deforming the liquid lens 223 in the present application, and in fact, the curvature radius of the convex surface is changed. Specifically, the liquid lens 223 can change the radius of curvature of the convex surface under the pressing of the pressing structure 224.

Taking the camera module 200 shown in fig. 2 as an example, the light-emitting surface 2232 is a convex surface, and the pressing structure 224 presses one side of the light-emitting surface 2232 of the liquid lens 223, so that the convex surface corresponding to the light-emitting surface 2232 is deformed to different degrees, that is, the curvature radius of the convex surface changes, so that the light is refracted at the convex surface when the light exits from the liquid lens 223, and the direction of the refracted light also changes due to the change of the curvature radius of the convex surface.

It should be noted that the term "change in the radius of curvature of the convex surface" includes a change in the radius of curvature corresponding to a spherical surface having the convex surface as a standard, and also includes a change in the radius of curvature of only a part of the spherical surfaces having the micro-size, when the convex surface is a smooth curved surface formed of a plurality of spherical surfaces having the micro-size. For example, when the extrusion structure 224 extrudes the side of the light-emitting surface 2232, only a partial area of the light-emitting surface 2232 is extruded, and the other part of the light-emitting surface 2232 is only slightly or not slightly changed because of being extruded by the whole liquid lens 223, so that relatively, the area of the light-emitting surface 2232 directly extruded by the extrusion structure 224 will be more obviously deformed, the change of the propagation direction of the light when the light exits from the surface corresponding to the partial area is larger, and the light exiting along the second optical axis 200b of the camera will be hardly affected. For another example, the pressing structure 224 presses one side of the light-emitting surface 2232 to make the other side expand and swell relatively, so that the entire convex surface corresponding to the light-emitting surface 2232 deflects relative to the second optical axis 200b, and when the photosensitive area 220a of the optical sensor 220 performs imaging, the imaging field of view also scans along with the deflection of the convex surface relative to the second optical axis 200b, and then image shake generated by vibration during shooting can be compensated by using the adjusting method, so as to achieve optical anti-shake.

The pressing structure 224 has various structural forms as long as the liquid lens 223 can be pressed and deformed to adjust the light emitting direction.

For example, in some embodiments, the extrusion structure 224 is pneumatically extruded.

Specifically, the extrusion structure 224 includes an inflation and deflation element and an annular air bag, the annular air bag is annularly arranged on the liquid lens 223 along the direction of the second optical axis 200b, the inflation and deflation element inflates or deflates the annular air bag, so that the annular air bag expands or contracts in different degrees, and the liquid lens 223 is extruded by the expansion and contraction movement of the annular air bag, so that the regulation and control of the emergent light of the liquid lens 223 are realized. Of course, the annular air bag may be replaced by a non-annular air bag, for example, a plurality of air bags are uniformly distributed around the second optical axis 200b on the periphery of the liquid lens 223, in this way, the extrusion form of the liquid lens 223 may be richer by the inflation and deflation of one or some of the air bags alone, so as to obtain richer dimming effect.

In other embodiments, the pressing structure 224 may also directly adopt a micro telescopic cylinder, and a telescopic rod of the telescopic cylinder is used to press the liquid lens 223, so that the dimming of the liquid lens 223 can be realized to meet the focusing and anti-shake requirements.

In other embodiments, the pressing structure 224 may press the liquid lens 223 by generating a moving force by electromagnetic induction.

Specifically, as shown in connection with fig. 2, the pressing structure 224 includes a magnet 2241, a pressing seat 2242, and a coil 2243. The pressing base 2242 is connected with the mirror base 216 through the elastic sheet 225, so that when the pressing base 2242 does not press the liquid lens 223, the elastic sheet 225 can keep the pressing base 2242 to be reset to an initial state, and only when the pressing base 2242 is moved relative to the mirror base 216 under the action of the magnetic force of the coil 2243 and the magnet 2241, the elastic sheet 225 is forced to deform by the magnetic force.

In some embodiments, the magnet 2241 is fixed on the inner wall of the lens holder 216, the coil 2243 is connected to the pressing seat 2242, and the coil 2243 can move the pressing seat 2242 relative to the lens holder 216 under the magnetic field of the magnet 2241 when it is powered on, so that the pressing seat 2242 presses the liquid lens 223. The coil 2243 is arranged on the pressing seat 2242, so that the weight of the pressing seat 2242 can be reduced as much as possible, the driving force provided by the magnetic action of the coil 2243 and the magnet 2241 can drive the pressing seat 2242 to move relative to the lens seat 216 to press the liquid lens 223, that is, the closed capsule 223a of the liquid lens 223 is pressed, so that the closed capsule 223a and the liquid 223b inside the closed capsule 223a deform to meet the dimming requirement of the liquid lens 223 on the emergent light of the prism 211.

In other embodiments, the coil 2243 may be disposed on the inner wall of the lens holder 216, and accordingly, the magnet 2241 is connected to the pressing seat 2242, in this way, the pressing seat 2242 can be moved relative to the lens holder 216 by using the magnetic force of the coil 2243 and the magnet 2241, considering that the magnet 2241 is connected to the pressing seat 2242 and when the pressing seat 2242 presses the liquid lens 223, the magnet 2241 moves along with the pressing seat 2242, and in order to make the pressing seat 2242 move lightly, the magnet 2241 may be a neodymium iron boron magnet with strong magnetism and small volume.

It should be noted that, the extrusion structure 224 includes the corresponding magnet 2241 and the coil 2243 that set up of multiunit, and wherein, multiunit coil 2243 arranges along the week side of extrusion seat 2242 to make extrusion seat 2242 can extrude the different sides of liquid lens 223, in order to promote the regulation and control effect of liquid lens 223 to emergent ray.

Since the movement of the coil 2243 in the magnetic field is related to the direction of current flow through the coil 2243, in some embodiments, the coil 2243 may be controlled to move the plunger 2242 in the opposite direction by controlling the direction of the current flowing through the coil 2243. For example, as shown in fig. 2, when the pressing base 2242 needs to be driven to deflect towards the right side relative to the imaging second optical axis 200b, the coil 2243 on the left side is supplied with a current in a first direction, so that the coil 2243 drives the left side of the pressing base 2242 to move upwards, and correspondingly, the coil 2243 on the right side is supplied with a current in a direction opposite to the first direction, so that the right side of the pressing base 2242 can move downwards under the driving of the coil 2243. Coil 2243 that is located extrusion seat 2242 both sides like this can act on simultaneously and extrude seat 2242 and deflect towards common adjustment direction to effectively improve regulation efficiency, then during feasible shooting, can be quick adjust luminance, with the shooting effect that obtains the preferred.

In this embodiment, a driving module disposed in the electronic device is configured to regulate and control the pressing structure 224 according to the shake information, so that the pressing structure 224 presses and deforms the liquid lens 223, and the liquid lens 223 moves or deflects towards a desired direction, so as to achieve focusing and shake prevention.

Specifically, when the pressing structure 224 adopts the way that the coil 2243 is electrified to move in the magnetic field to adjust the pressing seat 2242, the driving module is used for regulating and controlling the direction and the size of the current flowing through the corresponding coil 2243, so that the coil 2243 acts on the pressing seat 2242 with different forces, and then the pressing seat 2242 realizes different degrees of pressing deformation on the liquid lens 223, so as to adapt to the adjustment requirement of the light ray which needs to be incident to the light sensing area 220a of the optical sensor 220.

In other embodiments, the liquid lens can change the liquid level inside the liquid lens to realize the dimming effect on the emergent light.

In order to distinguish from the squeeze type liquid lens 223 described above, as shown in fig. 3 and 5, in this embodiment, a liquid lens 213 is shown, and the liquid lens 213 includes a sealed cavity, and a conductive fluid 213a and an insulating fluid 213b filled in the sealed cavity. The sealed cavity may be formed by enclosing the light incident side 2131, the peripheral side and the light exit side 2132, wherein the light incident side 2131 and the light exit side 2132 can allow light to pass through, for example, a transparent glass plate or a plastic plate is used to form the light incident side 2131 and the light exit side 2132. The periphery is enclosed between the light incident side 2131 and the light emergent side 2132, and the inner wall is provided with the hydrophobic layer 2133, so that the conductive fluid 213a has a more precise contact angle regulation effect when generating an electrowetting effect. The material of the hydrophobic layer 2133 may be an amorphous fluoropolymer such as AF1600, AF1601 or AF1600X, supplied by DuPont, or any other low surface energy polymer.

The conducting fluid 213a and the insulating fluid 213b are immiscible with each other and separated by an interface 213c therebetween, refractive indexes of the conducting fluid 213a and the insulating fluid 213b are different, and light emitted from the prism 211 can be refracted at the interface 213c and then incident on the lens group 212.

In the embodiment of using the liquid lens 213 to adjust the light emitted from the prism 211, an electrode set 214a is disposed in the lens holder 216, and the electrode set 214a is used to adjust the state of the liquid lens 213 when the power is turned on, so that the light passing through the liquid lens 213 is focused or diffused differently. Specifically, the electrode set 214a is used to adjust a contact angle between the interface 213c and the sidewall of the sealed cavity when the power is turned on, so as to change the shape of the interface 213c, so that the light is refracted when passing through the interface 213c to achieve the dimming effect.

When the liquid lens 213 is needed to adjust the propagation direction of the light, the electrode set 214a may be used to conduct electricity to the conductive fluid 213a to generate an electrowetting effect, so as to change the contact angle between the conductive fluid 213a and the peripheral side, that is, the contact angle between the interface 213c and the sidewall of the sealed cavity, so that the shape of the interface 213c is changed, and further the light passing through the interface 213c is refracted to different degrees.

In this embodiment, the driving module disposed in the electronic device is configured to regulate the electrode group 214a according to the jitter information, so that the electrode group 214a provides different voltages for the conductive fluid 213a to generate the electrowetting effect to adjust the contact angle between the interface 213c and the sidewall of the sealed cavity, and then change the shape of the interface 213c to meet the requirement of adjusting light to achieve optical anti-jitter.

The optical principle of the liquid lens 213 will be further described below only in four states of the liquid lens 213 shown in fig. 5 to 8.

As shown in fig. 3, the liquid lens 213 is electrically connected to two sets of electrode sets 214a, the two sets of electrode sets 214a are respectively disposed on two opposite sides of the liquid lens 213 perpendicular to the second optical axis 200b, so that the two sets of electrodes are used to respectively adjust and control the contact angle at the corresponding interface 213c, so that the interface 213c can not only adapt to the change of curvature, but also adjust the deflection direction of the interface 213c relative to the second optical axis 200b to deflect the light relative to the second optical axis 200 b.

Referring to fig. 5, the first electrode 2134 electrically connected to the conductive fluid 213a and the second electrode 2135 electrically connected to the sealed cavity form one of the electrode sets 214 a. The third electrode 2136 electrically connected to the conductive fluid 213a and the fourth electrode 2137 electrically connected to the sealed cavity form another group of electrode sets 214 a. In this arrangement, a voltage V1 between the first electrode 2134 and the second electrode 2135 is a voltage applied to one side of the liquid lens 213, and a voltage V2 between the third electrode 2136 and the fourth electrode 2137 is a voltage applied to the other side of the liquid lens 213. The contact angle of the interface 213c at the corresponding position is changed by the change of the voltage V1 and the voltage V2, so as to realize dimming.

When the voltage V1 and the voltage V2 are equal, the contact angles between the interface 213c and the two opposite sidewalls of the sealed cavity are equal, so that the interface 213c is symmetrical about the optical axis, and the light passing through the interface 213c is symmetrical to converge or diverge. For example, when the voltage V1 and the voltage V2 are both the first voltage value, such as 0V, the conductive fluid 213a does not generate the electrowetting effect, the interface 213c between the conductive fluid 213a and the insulating fluid 213b is in the first state, the side of the interface 213c corresponding to the conductive fluid 213a presents a convex arc surface, and due to the different refractive indexes of the conductive fluid 213a and the insulating fluid 213b, the light is refracted when passing through the interface 213c, and the parallel light is diffused.

Referring to fig. 6, when the voltage V1 and the voltage V2 are both at the second voltage value, for example, 37V, the conductive fluid 213a generates the electrowetting effect, the interface 213c between the conductive fluid 213a and the insulating fluid 213b will be in the second state, the interface 213c is in a plane, and the propagation direction of the parallel light ray passing through the interface 213c along the optical axis is unchanged.

Referring to fig. 7, when the voltage V1 and the voltage V2 are both at a third voltage value, for example, 50V, the conductive fluid 213a generates an electrowetting effect, the interface 213c between the conductive fluid 213a and the insulating fluid 213b is in a third state, and the side of the interface 213c corresponding to the conductive fluid 213a is a concave arc surface, so that the light propagating along the optical axis is refracted and focused when passing through the interface 213c due to the different refractive indexes of the conductive fluid 213a and the insulating fluid 213 b.

Referring to fig. 8, when the voltage V1 is not equal to the voltage V2, that is, the contact angle between the interface 213c and the side wall of the sealed cavity is not consistent with the electrowetting effect caused by the influence of the voltages V1 and V2 on different sides, that is, the interface 213c between the conductive fluid 213a and the insulating fluid 213b is in the fourth state, the interface 213c deflects at a certain angle relative to the optical axis, so that the light beam is deflected to one side at the interface 213c, specifically, the focus F of the light beam focused by the liquid lens 213 deviates from the second optical axis 200b, that is, the light beam is deflected relative to the second optical axis 200b, so as to optically prevent the image shake caused by the vibration of the camera module 200 in this way.

The shape of the interface 213c varies depending on the magnitude of the voltage applied to the electrode set 214a and the material of the conductive fluid 213 a. Different materials, at the same voltage, have different electrowetting effects. That is, the interface 213c may have different shapes under the same first voltage value, second voltage value and third voltage value by using different conductive fluids 213 a.

In some embodiments, the conductive fluid 213a may be deionized water and the insulating fluid 213b may be silicon oil. The materials of the conductive fluid 213a and the insulating fluid 213b are not limited herein, and only the electrowetting effect is required to generate the shape change at the interface 213 c.

When the interface 213c is deformed to be in different forms, the liquid lens 213 will focus or scatter light to different degrees, and further the electrowetting of the electrode group 214a on the conductive fluid 213a is used to change the contact angle of the interface 213c, so that the direction of the light emitted by the liquid lens 213 can be adjusted, and the light finally incident on the photosensitive area 220a of the optical sensor 220 and imaged is always the light modulated by the liquid lens 213, therefore, from the perspective of imaging performed by the optical sensor 220, the light modulation performed by the liquid lens 213 will enable the optical sensor 220 to obtain different shooting fields. For example, when the liquid lens 213 focuses light properly, the light emitted from the liquid lens 213 enters the photosensitive area 220a of the optical sensor 220 after passing through the lens group 212, and the light focusing degree of the liquid lens 213 is different, that is, the focal length is adjusted, so that the photosensitive area 220a of the optical sensor 220 obtains the light of a distant scene to achieve long-range shooting, or the photosensitive area 220a of the optical sensor 220 obtains the light of a close scene to achieve short-range shooting.

In this way, the liquid lens 213 is only electrowetting inside the conductive fluid 213a, and the position of the contact angle of the interface 213c is not changed, so that the light propagation direction can be changed to meet the focusing or anti-shake requirement without moving the liquid lens 213. Because the liquid lens 213 does not need to move when dimming, the response is fast and sensitive, so that a faster dimming effect can be obtained, and when adjusting a larger lens, a power source with a large volume is not needed, and only the electrode group 214a is needed to provide electrowetting voltage for the conductive fluid 213a, so that the camera module 200 can still provide a better focusing or anti-shaking effect under the condition of maintaining a small structure.

The lens assembly 212 includes a plurality of convex lenses and/or concave lenses for focusing or filtering light by using the lens assembly.

For example, in some embodiments, the lens assembly 212 includes a convex lens and a concave lens disposed along the optical axis, the light passing through the liquid lens 213 is focused after entering the convex lens of the lens assembly 212, and then is diffused while passing through the concave lens, so that the stray light of different frequency bands in the light can be separated from the light entering the photosensitive area 220a of the optical sensor 220, and the stray light is prevented from entering the photosensitive area 220a of the optical sensor 220 to affect the imaging effect.

It should be noted that the kind, number and composition of the lenses of the lens assembly 212 may be any known structure in the art, and may also be adjusted according to the actual light processing requirements. The specific structure of the lens assembly 212 is not limited herein, as long as the liquid lens 213 can process the propagation direction of the light beam therebetween, so that the light beam finally incident on the photosensitive area 220a of the optical sensor 220 can meet the requirement of imaging.

As shown in fig. 3, the camera module 200 further includes a mounting plate 214 disposed in the mirror base 216, the prism 211 and the lens group 212 are respectively disposed on two sides of the mounting plate 214 after being mounted on the mirror base 216, and the liquid lens 213 is connected to the mounting plate 214.

The mounting plate 214 is a mounting carrier for the liquid lens 213, but does not affect the incidence of light from the prism 211 to the liquid lens 213. The mounting plate 214 may be made of a transparent glass plate or a plastic plate, and has a light transmittance of more than 70%, that is, light exits from the prism 211, and at least 70% of the light can pass through the mounting plate 214, so that enough light enters the liquid lens 213 and enters the photosensitive area 220a of the optical sensor 220 from the lens set 212.

In other embodiments, the mounting plate 214 may not be made of transparent material, but a through hole for light to pass through is formed in the mounting plate 214, and after the liquid lens 213 is mounted and fixed by the mounting plate 214, the light can still enter the liquid lens 213 through the through hole. As for the structure of the mounting plate 214, it is only necessary to satisfy the mounting requirement of the liquid lens 213 and adapt to the requirement of the light entering the liquid lens 213, and the description thereof is omitted.

In the embodiment of the liquid lens 213 using the squeeze-type liquid lens 213, as shown in fig. 3, the mounting board 214 may be internally wired to electrically connect the electrical signals of the electrode group 214a to an external circuit. For example, a lead 214b is disposed on an outer side of the lens holder 216, and the lead 214b is electrically connected to the electrode group 214a through an internal trace of the mounting board 214, so as to be electrically connected to an external circuit through the lead 214b after the lens holder 216 is assembled to the camera module 200. For example, the camera module 200 includes a circuit board 200c, the optical sensor 220 is disposed on the circuit board 200c, and the leads 214b are electrically connected to the circuit board 200 c. The optical sensor 220 is mounted on the circuit board 200c in the form of a patch, and the optical sensor 220 may be adhered to the circuit board 200c by glue.

It should be noted that the circuit board 200c may be a rigid circuit board or a flexible circuit board, and the type of the circuit board 200c is not limited herein. It is understood that the circuit board 200c may be printed with a circuit to electrically connect with the optical sensor 220, so that an electrical signal generated when the photosensitive region 220a of the optical sensor 220 is illuminated to generate an optoelectronic effect may be transmitted from the circuit board 200c to a corresponding functional module such as a controller, an image processor, a memory, etc.

The lens holder 216 is connected to the circuit board 200c and covers the optical sensor 220 therein, so that the light emitted from the lens set 212 can enter the photosensitive area 220a of the optical sensor 220, and the light optically processed by the lens set 210 enters the photosensitive area 220a for imaging.

In some embodiments, the lens holder 216 is provided with a filter 215, the filter 215 is located on a side of the lens set 212 farther from the prism 211 in an extending direction of an optical axis of the lens set 212, and then when the lens set 210 is mounted on the camera module 200, the filter 215 is located between the lens set 212 and the optical sensor 220 for filtering light emitted from the lens set 212, so that the light incident to the optical sensor 220 has no stray light interference, and a better imaging effect is obtained. For example, in some embodiments, the filter 215 may filter out infrared light in the light, so that the light sensor 220 is not interfered by the infrared light when imaging, so as to improve the imaging effect.

With continued reference to FIG. 3, the mirror mount 216 includes a first support 2161, a second support 2162, and a third support 2163. The light incident portion 216a is located in the first holder 2161, and the prism 211 is disposed in the first holder 2161 and opposite to the light incident portion 216 a. The lens assembly 212 is disposed on the second support 2162, and the filter 215 is disposed on the third support 2163. A mounting plate 214 is coupled between the first and second standoffs 2161, 2162 to mount the liquid lens 213 between the prism 211 and the lens group 212.

The second and third seats 2162 and 2163 are connected to each other and have a hollow shell-like structure. The second support 2162 defines a mounting hole 216b, and the lens assembly 212 is mounted in the mounting hole 216 b.

Lens group 212 has a variety of mounting configurations.

In some embodiments, lens set 212 may be threadably coupled to second support 2162, that is, mounting hole 216b of second support 2162 is a threaded hole, and accordingly, the periphery of lens set 212 is provided with an external thread matching mounting hole 216b, so that lens set 212 may be threadably coupled in mounting hole 216 b. In this way, the lens assembly 212 may be screwed to the first support 2161, and the screwing also provides a certain focusing requirement, so that the distance between the prism 211 and the optical sensor 220 is adjusted within a suitable range, and the imaging requirement of the photosensitive area 220a of the optical sensor 220 is met.

Lens assembly 212 may also be mounted on second support 2162 by snap-fitting, and details of the mounting of lens assembly 212 are not repeated herein.

First support 2161 and second support 2162 can be in an organic whole together with mounting panel 214 injection moulding to the equipment has been simplified, reduction in production cost, simultaneously, this kind of integrated into one piece's structural style is more stable, is difficult to appear becoming flexible, thereby ensures that the relative position between liquid lens 213 and lens group 212 can not receive the influence because of mounting panel 214 and second support 2162 become flexible, with formation of image stability when effectively guaranteeing camera module 200 and shoot.

The third support 2163 has a light hole 216c, and the filter 215 is disposed at a position opposite to the light hole 216c, so that the light filtered by the filter 215 can exit from the light hole 216c to the light sensor 220.

Further, a step groove is formed at the light transmitting hole 216c, and the filter 215 is fixed in the step groove. In other embodiments, the filter 215 may be adhered to the sidewall of the light-passing hole 216c by glue instead of forming the step groove.

It should be noted that the third support 2163 serves as a carrier for mounting the optical filter 215, and the third support 2163 may be omitted when the optical filter 215 is not needed.

The liquid lens 213 is mounted in the lens holder 216 through the mounting plate 214, and the first holder 2161 can be directly used as a carrier for mounting the liquid lens 213, and only a through hole or a light-transmitting member is required to be disposed at a corresponding position of the first holder 2161, so as to allow light to enter the liquid lens 213 and exit from the liquid lens 213 to the lens assembly 212. In the camera module 200 shown in fig. 2, even if the liquid lens 213 realizes the dimming effect by adopting a squeeze mode, the structural arrangement form of the lens holder 216 is not affected, that is, the lens module can be assembled by using the structural form of the lens holder 216 described above regardless of adopting the squeeze mode liquid lens 223 shown in fig. 2 or adopting the liquid lens 213 with the electrowetting effect shown in fig. 3.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A lens group, characterized by comprising:

a lens base having a light incident portion;

the lens group is arranged in the lens base;

2. The lens group according to claim 1, wherein said prism is movable in a direction of said optical axis relative to said lens group, or said prism is movable in said first direction.

3. The lens group as set forth in claim 1, wherein the prism is rotatably coupled to the lens holder by a rotation shaft, the rotation shaft being perpendicular to an optical axis of the lens group.

4. The lens group of claim 3, wherein the prism is slidable along the rotation axis.

5. The lens group according to any one of claims 1 to 4, wherein the liquid lens includes a closed capsule and a liquid filling the closed capsule, and light can penetrate the liquid from one side of the closed capsule and exit from the other side in the direction of the optical axis, and a pressing structure is provided in the lens holder, the pressing structure being capable of pressing the closed capsule and deforming the closed capsule together with the liquid.

6. The lens group as set forth in claim 5, wherein the surface of the closed capsule for light to enter the liquid defines a light-in surface, the surface of the closed capsule for light to exit defines a light-out surface, the light-in surface is located on a side opposite to the lens group, the light-out surface is located on a side facing the lens group, at least one of the light-in surface and the light-out surface is a convex surface, and the liquid lens can change a curvature radius of the convex surface under the extrusion of the extrusion structure.

7. The lens group as claimed in claim 5, wherein the compressing structure comprises a magnet fixed on the inner wall of the lens holder, a compressing seat connected with the lens holder through a resilient plate, and a coil connected with the compressing seat, and when the coil is energized, the compressing seat is driven by the magnetic field of the magnet to move relative to the lens holder, so that the compressing seat compresses the closed capsule.

8. The lens group of any of claims 1-4, wherein the liquid lens comprises a sealed cavity and a conducting fluid and an insulating fluid filling the sealed cavity, the conducting fluid and the insulating fluid being immiscible and separated by an interface therebetween, the conducting fluid and the insulating fluid having different refractive indices, the emergent light being refracted at the interface and incident on the lens group; an electrode group is arranged in the lens base and used for adjusting a contact angle between the interface and the side wall of the closed cavity when the electrode group is electrified so as to change the shape of the interface.

9. A camera module, comprising a light sensor and the lens assembly as claimed in any one of claims 1 to 8, wherein the light sensor is disposed on a side of the lens assembly farther from the liquid lens along an optical axis of the lens assembly, the light sensor has a photosensitive area, and the photosensitive area can receive the light emitted from the lens assembly for imaging.

10. An electronic device, comprising the camera module of claim 9.