CN112099115B

CN112099115B - Liquid lens and camera module

Info

Publication number: CN112099115B
Application number: CN202011006985.0A
Authority: CN
Inventors: 董富伟
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2022-05-31
Anticipated expiration: 2040-09-23
Also published as: CN112099115A

Abstract

The application provides a liquid lens and a camera module. Two layers of conductive liquid and insulating liquid are filled in the closed cavity to form two interfaces, public electrodes are respectively arranged at two ends of the closed cavity, a plurality of driving electrodes are respectively arranged on the peripheral side of the closed cavity, the plurality of driving electrodes are arranged into two groups at intervals along the axial direction of the closed cavity, and the curvatures of the corresponding interfaces can be respectively adjusted by adjusting the electric field between each group of driving electrodes and the adjacent public electrodes, so that large-range focusing is realized; and the electric field between one driving electrode and the adjacent common electrode is adjusted, the curvature of the area corresponding to the driving electrode on the adjacent interface can be adjusted, and further the electric field between each driving electrode and the adjacent common electrode can be adjusted, and the deflection angle of the optical axis of the adjacent interface can be changed, so that the deflection angle of the optical axis of the liquid lens is adjusted, and the anti-shake function is realized.

Description

Liquid lens and camera module

Technical Field

The application belongs to the technical field of lenses, and more particularly relates to a liquid lens and a camera module.

Background

The liquid lens adjusts the curvature of an interface between two kinds of liquid by changing an electric field so as to change a focal length and further realize focusing. Because the liquid lens can realize the focusing function, when using, can remove the voice coil motor structure from, can simplify the structure, reduce the volume of the module of making a video recording, thus also attach more and more importance to the liquid lens at present. However, the current liquid lens does not have anti-shake performance, and when the liquid lens is used, an anti-shake structure is often required to be additionally arranged, so that the complexity and the volume of the lens are increased.

Disclosure of Invention

An object of the embodiments of the present application is to provide a liquid lens, so as to solve the problem that the liquid lens in the related art has a small focal length variation range and does not have anti-shake performance.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions: providing a liquid lens, which comprises a closed cavity with two ends being transparent, two layers of conductive liquid filled at the two ends of the closed cavity and insulating liquid positioned between the two layers of conductive liquid, wherein the refractive indexes of the conductive liquid and the insulating liquid are different, and two interfaces are formed between each layer of the conductive liquid and the insulating liquid; the both ends of closed cavity are equipped with respectively with two-layerly the common electrode that the conducting liquid electricity is connected, the week side interval of closed cavity is equipped with and is used for adjusting two respectively two sets of driving electrode of interface curvature, two sets of driving electrode follows closed cavity axial interval sets up, and is two sets of driving electrode all with each layer the insulating interval of conducting liquid sets up, each group driving electrode includes the center on a plurality of driving electrode that the week side of closed cavity set up.

In an optional embodiment, one set of the driving electrodes includes a plurality of first electrodes, and the other set of the driving electrodes includes a plurality of second electrodes, and the first electrodes and the second electrodes are arranged in a one-to-one correspondence.

In an alternative embodiment, the conducting liquid is the same density as the insulating liquid.

In an alternative embodiment, the surface tension of the conducting liquid and the insulating liquid is different.

In an optional embodiment, an oleophilic hydrophobic layer is arranged on the inner wall of the closed cavity.

In an optional embodiment, the closed cavity includes two transparent substrates disposed in parallel and a dam disposed between the two transparent substrates, the driving electrode is disposed on the dam, and the two common electrodes are disposed on the two transparent substrates, respectively.

In an alternative embodiment, the driving electrodes are disposed on an inner surface of the dam, and an insulating layer covering each driving electrode is disposed in the closed cavity.

In an alternative embodiment, each of the driving electrodes has a connecting plate extending outward adjacent to one end of the corresponding common electrode, and the insulating layer covers the connecting plate.

In an optional embodiment, the edge of the transparent substrate is provided with a notch exposing each connecting plate.

In an optional embodiment, the common electrode is a conductive plate, and an opening is formed in the conductive plate corresponding to the middle area of the box dam; or the common electrode is a transparent conductive layer arranged on the corresponding light-transmitting substrate.

In an alternative embodiment, the driving electrodes are provided on the outer surface of the dam, or the driving electrodes are integrally formed in the dam.

Another object of an embodiment of the present application is to provide a camera module, including the liquid lens according to any of the above embodiments.

The beneficial effect of the liquid lens that this application embodiment provided and module of making a video recording lies in: compared with the prior art, the liquid lens has the advantages that two layers of conductive liquid and insulating liquid are filled in the closed cavity to form two interfaces, the two ends of the closed cavity are respectively provided with the common electrodes, the peripheral sides of the closed cavity are respectively provided with the two groups of driving electrodes, each group of driving electrodes comprises the plurality of driving electrodes surrounding the peripheral sides of the closed cavity, and therefore the curvatures of the two interfaces can be adjusted by applying voltage to the plurality of driving electrodes in each group, and large-range focusing is further achieved; respectively applying voltage to the plurality of driving electrodes in each group to enable the group of driving electrodes to form differential pressure on two opposite sides of the closed cavity, so that the optical axis of the adjacent interface can deflect to one side of the closed cavity; when two groups of driving electrodes respectively form pressure difference at two opposite sides of the closed cavity, the optical axes of the two interfaces can deflect towards the same side of the closed cavity, and then the deflection angle of the optical axis of the liquid lens is adjusted, so that the anti-shake function is realized. The camera module using the liquid lens can realize focusing and anti-shake functions.

Drawings

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

Fig. 1 is a schematic structural diagram of a first liquid lens provided in an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a first liquid lens along an axial direction of a closed cavity of the first liquid lens according to an embodiment of the present application;

FIG. 3 is a schematic top view of a set of driving electrodes in the liquid lens shown in FIG. 2;

FIG. 4 is a schematic top view of the common electrode in the liquid lens shown in FIG. 2;

fig. 5 is a schematic structural diagram of a liquid lens provided in an embodiment of the present application when the liquid lens is a planar lens;

FIG. 6 is a schematic structural diagram of a liquid lens provided in an embodiment of the present application when the liquid lens is a crescent lens;

fig. 7 is a schematic structural diagram of a concave liquid lens provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a liquid lens provided in an embodiment of the present application when the liquid lens is a convex lens;

fig. 9 is a schematic structural diagram of a liquid lens provided in an embodiment of the present application when an optical axis is deflected;

FIG. 10 is a schematic diagram illustrating a top view of a set of driving electrodes in a second liquid lens according to an embodiment of the present application;

FIG. 11 is a schematic cross-sectional view of a third liquid lens provided in an embodiment of the present application;

FIG. 12 is a schematic cross-sectional view of a fourth liquid lens provided in an embodiment of the present application;

fig. 13 is a schematic structural diagram of a first camera module according to an embodiment of the present disclosure;

fig. 14 is an exploded view of the camera module of fig. 13;

fig. 15 is a schematic structural diagram of a second camera module according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a third camera module according to an embodiment of the present application.

Wherein, in the drawings, the reference numerals are mainly as follows:

100-a camera module;

10-a liquid lens; 101-optical axis; 11-sealing the cavity; 111-a light-transmissive substrate; 1111-a first light-transmitting substrate; 1112-a second light-transmissive substrate; 112-box dam; 113-a notch; 1131 — a first notch; 1132 — a second gap; 121-a conductive liquid; 1211 — a first conductive liquid; 1212-a second electrically conductive liquid; 122-an insulating liquid; 123-interface; 1231-first interface; 1232 — second interface; 13-a common electrode; 130-opening a hole; 131-a first common electrode; 132-a second common electrode; 14-a drive electrode; 141-a first electrode; 142-a second electrode; 15-a connecting plate; 151-first connecting plate; 152-a second connection plate; 16-an insulating layer; 17-an oleophilic hydrophobic layer;

211-a scaffold; 212-a flexible wiring board; 213-lens module; 2131-circuit board; 214-a conductive line; 215-conductive glue; 221-a support frame; 222-a circuit board; 223-an image sensor; 224-lens cone; 225-solid lens.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that, in the description of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

Reference throughout this specification to "one embodiment," "some embodiments," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather mean "one or more but not all embodiments" unless specifically stated otherwise. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Referring to fig. 1 to 3, a liquid lens 10 provided in the present application will now be described. The liquid lens 10 includes a closed cavity 11, and two ends of the closed cavity 11 are transparent, so that light can pass through the closed cavity 11 along the axial direction of the closed cavity 11. The enclosed cavity 11 is filled with an insulating liquid 122 and two layers of conductive liquids 121, the insulating liquid 122 is located between the two layers of conductive liquids 121, and the conductive liquids 121 and the insulating liquid 122 are immiscible with each other, so that two interfaces 123 are formed between the insulating liquid 122 and the two layers of conductive liquids 121, and refractive indexes of the conductive liquids 121 and the insulating liquid 122 are different, so that light rays can be refracted when passing through the interfaces 123 between the insulating liquid 122 and the conductive liquids 121, thereby realizing light ray adjustment. The two layers of conductive liquid 121 and insulating liquid 122 are filled in the closed cavity 11, so that when the closed cavity 11 is shaken, the insulating liquid 122 and the conductive liquid 121 can be prevented from being mixed, and the stability of the interface 123 of the insulating liquid 122 and the conductive liquid 121 is further ensured.

The direction from one end of the closed cavity 11 to the other end is the axial direction or the thickness direction; and the axial side of the closed cavity 11 is the side of the closed cavity 11. Two ends of the closed cavity 11 are respectively provided with a common electrode 13, the two common electrodes 13 are respectively electrically connected with the two layers of conductive liquid 121, the periphery of the closed cavity 11 is provided with a plurality of driving electrodes 14, and the two adjacent driving electrodes 14 are arranged at intervals so as to enable the two adjacent driving electrodes 14 to be insulated; the plurality of driving electrodes 14 are divided into two groups, each group comprises the plurality of driving electrodes 14, the two groups of driving electrodes 14 are distributed along the axial direction of the closed cavity 11, the two groups of driving electrodes 14 are arranged at intervals in an insulated manner with the conductive liquid 121 on each layer, and the driving electrodes 14 of each group are arranged around the periphery of the closed cavity 11. Thus, by applying current between a set of driving electrodes 14 and the adjacent common electrode 13 to change the electric field between the set of driving electrodes 14 and the adjacent common electrode 13, the curvature of the interface 123 between the insulating liquid 122 and the conductive liquid 121 electrically connected to the common electrode 13 can be changed under the influence of the electric field, thereby changing the focal length of the liquid lens 10. By changing the electric field between the two sets of driving electrodes 14 and the corresponding common electrode 13, the curvatures of the two interfaces 123 can be respectively changed, so that the focal length of the liquid lens 10 can be adjusted more accurately, and the focal length of the liquid lens 10 can be adjusted in a wider range.

Referring to fig. 9, since there are a plurality of driving electrodes 14, different voltages are applied to the driving electrodes 14 in a group, respectively, so that a pressure difference is formed in a direction from one side to the other side of the enclosed cavity 11 for the driving electrodes 14 in the group, and the optical axis 101 of the corresponding interface 123 is deflected, and the deflection angle of the optical axis 101 of the corresponding interface 123 can be adjusted by adjusting the pressure difference. When different voltages are applied to the driving electrodes 14 in the two groups, the two groups of driving electrodes 14 form pressure differences in the direction from one side of the enclosed cavity 11 to the other side, so that the optical axes 101 of the two interfaces 123 are deflected to the same side, the deflection angles of the optical axes 101 of the two interfaces 123 can be adjusted, and the deflection angle of the optical axis 101 of the liquid lens 10 can be adjusted, so that the liquid lens 10 achieves an anti-shake function, and thus the liquid lens 10 has both a focusing function and an anti-shake function.

Compared with the prior art, the liquid lens 10 provided by the application has the advantages that two layers of conductive liquid 121 and insulating liquid 122 are filled in the closed cavity 11 to form two interfaces 123, the two ends of the closed cavity 11 are respectively provided with the common electrodes 13, the peripheral side of the closed cavity 11 is respectively provided with the plurality of driving electrodes 14, the plurality of driving electrodes 14 are axially arranged into two groups along the closed cavity 11 at intervals, and accordingly, the electric field between each group of driving electrodes 14 and the adjacent common electrodes 13 can be adjusted to respectively adjust the curvature of the corresponding interfaces 123, and further large-range focusing is realized; by applying voltage to the driving electrodes 14 in each group, respectively, the driving electrodes 14 in the group form a pressure difference on the two opposite sides of the enclosed cavity 11, so that the optical axis of the adjacent interface 123 can be deflected to one side of the enclosed cavity 11; when two sets of driving electrodes 14 respectively form a pressure difference on two opposite sides of the enclosed cavity 11, the optical axes of the two interfaces 123 can both deflect to the same side of the enclosed cavity 11, and further the deflection angle of the optical axis 101 of the liquid lens 10 is adjusted, so as to realize the anti-shake function.

Referring to fig. 1 and fig. 2, one set of driving electrodes 14 includes a plurality of first electrodes 141, and the other set of driving electrodes 14 includes a plurality of second electrodes 142, i.e. the plurality of driving electrodes 14 are respectively the plurality of first electrodes 141 and the plurality of second electrodes 142, and the plurality of first electrodes 141 form one set of driving electrodes 14, and the plurality of second electrodes 142 form the other set of driving electrodes 14. The common electrode 13 includes a first common electrode 131 and a second common electrode 132, and the first common electrode 131 and the second common electrode 132 are respectively located at both ends of the closed cavity 11. The two layers of conductive liquid 121 are a first conductive liquid 1211 and a second conductive liquid 1212 respectively, the first conductive liquid 1211 and the second conductive liquid 1212 are located at two ends of the closed cavity 11, the insulating liquid 122 is located between the first conductive liquid 1211 and the second conductive liquid 1212, a first interface 1231 is formed between the insulating liquid 122 and the first conductive liquid 1211, and a second interface 1232 is formed between the second insulating liquid 122 and the second conductive liquid 1212, that is, the two interfaces 123 are a first interface 1231 and a second interface 1232 respectively. The first conductive liquid 1211 is located at one end of the closed cavity 11 close to the first common electrode 131, the second conductive liquid 1212 is located at one end of the closed cavity 11 close to the second common electrode 132, the first conductive liquid 1211 is electrically connected to the first common electrode 131, and the second conductive liquid 1212 is electrically connected to the second common electrode 132. The first electrode 141 is located at one end of the side of the closed cavity 11 close to the first common electrode 131, and the second electrode 142 is located at one end of the side of the closed cavity 11 close to the second common electrode 132.

Referring also to fig. 9, the curvature of the first interface 1231 can be adjusted by applying a voltage to the plurality of first electrodes 141; when different voltages are applied to the plurality of first electrodes 141 in a direction from one side to the other side of the closed cavity 11, a pressure difference is formed between the plurality of first electrodes 141, so that the first interface 1231 is deflected, and the optical axis deflection angle of the first interface 1231 is adjusted. Similarly, by applying voltages to the plurality of second electrodes 142, the curvature of the second interface 1232 can be adjusted; when different voltages are applied to the plurality of second electrodes 142, and a pressure difference is formed between the plurality of second electrodes 142 in a direction from one side to the other side of the enclosed cavity 11, the second interface 1232 can be deflected, and the optical axis deflection angle of the second interface 1232 can be adjusted. Meanwhile, different voltages are applied to the plurality of first electrodes 141 and different voltages are applied to the plurality of second electrodes 142, so that a pressure difference is formed between the plurality of first electrodes 141 and the plurality of second electrodes 142 in a direction from one side to the other side of the enclosed cavity 11, and the first interface 1231 and the second interface 1232 can both deflect towards the same side of the enclosed cavity 11, thereby adjusting the optical axis deflection angle of the liquid lens 10 to realize the anti-shake function.

In one embodiment, referring to fig. 2, 3 and 9, the first electrodes 141 and the second electrodes 142 are disposed in a one-to-one correspondence, so that the same positions of the two interfaces 123 can be synchronously adjusted to better control the liquid lens 10 and adjust the deflection angle of the optical axis 101 of the liquid lens 10.

In one embodiment, the inner wall of the closed cavity 11 is provided with the oleophilic hydrophobic layer 17 to improve the affinity of the insulating liquid 122 with the inner wall of the closed cavity 11, so as to reduce the affinity of the conductive liquid 121 with the closed cavity 11, thereby making the insulating liquid 122 better separate the two layers of conductive liquid 121, and also facilitating the driving of the shape change of the conductive liquid 121.

In one embodiment, the density of the conducting liquid 121 and the insulating liquid 122 is the same, so that when the conducting liquid 121 and the insulating liquid 122 fill the closed cavity 11, the conducting liquid 121 and the insulating liquid 122 are relatively stationary when the closed cavity 11 is shaken at a high speed, and thus the insulating liquid 122 and the conducting liquid 121 are prevented from mixing, and the interface 123 between the insulating liquid 122 and the conducting liquid 121 is stable.

In one embodiment, the two layers of conductive liquid 121 are made of the same material, which can reduce the cost and facilitate the control of the focal length of the liquid lens 10. In some embodiments, the two layers of conductive liquid 121 may be made of different materials, so that the two layers of conductive liquid 121 can be easily distinguished.

In one embodiment, the surface tension of the conducting liquid 121 and the insulating liquid 122 are different, so as to ensure that the interface 123 between the insulating liquid 122 and the conducting liquid 121 is stable. In one embodiment, the difference between the surface tension of the conducting liquid 121 and the surface tension of the insulating liquid 122 is larger, so as to better ensure the stability of the interface 123 between the insulating liquid 122 and the conducting liquid 121.

In one embodiment, referring to fig. 1 and fig. 2, the enclosed cavity 11 includes two transparent substrates 111 and a dam 112, the two transparent substrates 111 are disposed in parallel, and the dam 112 is disposed between the two transparent substrates 111, so that the two transparent substrates 111 are two ends of the enclosed cavity 11 respectively, so that the two transparent substrates 111 and the dam 112 enclose the enclosed cavity 11. Each of the driving electrodes 14 is disposed on the dam 112, and the two common electrodes 13 are disposed on the two light-transmitting substrates 111, respectively. The structure can facilitate the processing and manufacturing of the closed cavity 11 and the installation and the arrangement of the driving electrode 14 and the common electrode 13. In some embodiments, a hole may be cut in the transparent substrate and covered with a transparent sheet to form the enclosed cavity 11.

Referring to fig. 1 and fig. 2, the two transparent substrates 111 are a first transparent substrate 1111 and a second transparent substrate 1112, respectively, the first common electrode 131 is disposed on the first transparent substrate 1111, and the second common electrode 132 is disposed on the second transparent substrate 1112.

In one embodiment, referring to fig. 1 and fig. 2, the driving electrodes 14 are disposed on the inner surface of the dam 112, and the insulating layer 16 covering each driving electrode 14 is disposed in the enclosed cavity 11, that is, the first electrode 141 and the second electrode 142 are both disposed on the inner surface of the dam 112, so that the insulating layer 16 covers the first electrode 141 and the second electrode 142, which can better adjust the electric field between the driving electrode 14 and the adjacent common electrode 13.

In one embodiment, insulating layer 16 may be the aforementioned oleophilic hydrophobic layer 17. Of course, in some embodiments, the oleophilic hydrophobic layer 17 may be separately disposed on the inner surface of the insulating layer 16.

In one embodiment, referring to fig. 1 to 3, each driving electrode 14 has a connecting plate 15 extending outward adjacent to one end of the adjacent transparent substrate 111, and the insulating layer 16 covers the connecting plate 15. A connection plate 15 is provided on each of the driving electrodes 14 to facilitate electrical connection with an external circuit. Specifically, for example, a first connection plate 151 extends outward from one end of the first electrode 141 close to the first light-transmitting substrate 1111, so as to facilitate electrical connection between the first electrode 141 and an external circuit. A second connecting plate 152 extends outwardly from an end of the second electrode 142 close to the second transparent substrate 1112, so as to facilitate electrical connection between the second electrode 142 and an external circuit.

In one embodiment, referring to fig. 1, the edge of the transparent substrate 111 is formed with a notch 113 for turning out each connecting plate 15, so as to facilitate connection of each driving electrode 14 to an external circuit. Specifically, a first notch 1131 is opened at an edge of the first transparent substrate 1111 to expose the first connecting plate 151, so that the first connecting plate 151 can be connected to an external circuit. A second gap 1132 is opened at an edge of the second transparent substrate 1112 to expose the second connection board 152, so that the second connection board 152 is connected to an external circuit.

In one embodiment, referring to fig. 2 and 4, the common electrode 13 is a conductive plate, such as a metal plate, or a metal layer. Of course, it may be a conductive plate made of other conductive materials. The conductive plate has an opening 130 formed therein corresponding to the hollow region of the dam 112 so that light can pass through the common electrode 13.

In one embodiment, referring to fig. 2 and fig. 3, each group of driving electrodes 14 includes four driving electrodes 14, and the four driving electrodes 14 in each group are uniformly distributed on the peripheral side of the closed cavity 11, that is, four first electrodes 141 and four second electrodes 142 are provided, so as to conveniently control the deflection angle of the optical axis 101 of each interface 123.

Referring to fig. 5, when the voltages between the plurality of first electrodes 141 and the first common electrode 131 are adjusted to make the first interface 1231 be a plane, and the voltages between the plurality of second electrodes 142 and the second common electrode 132 are adjusted to make the second interface 1232 be a plane, the liquid lens 10 can be a planar lens, and the light directly passes through the liquid lens 10 along the axial direction of the liquid lens 10.

Referring to fig. 1, when the voltages between the first electrodes 141 and the first common electrode 131 are adjusted to make the middle of the first interface 1231 protrude toward the first light-transmitting substrate 1111 and the voltages between the second electrodes 142 and the second common electrode 132 are adjusted to make the middle of the second interface 1232 protrude toward the first light-transmitting substrate 1111, the liquid lens 10 forms a crescent lens protruding toward one side of the first light-transmitting substrate 1111.

Referring to fig. 6, when the voltages between the first electrodes 141 and the first common electrode 131 are adjusted to make the middle of the first interface 1231 protrude toward the second transparent substrate 1112, and the voltages between the second electrodes 142 and the second common electrode 132 are adjusted to make the middle of the second interface 1232 also protrude toward the second transparent substrate 1112, the liquid lens 10 forms a crescent lens protruding toward one side of the second transparent substrate 1112.

Referring to fig. 7, when the voltages between the first electrodes 141 and the first common electrode 131 are adjusted to make the middle of the first interface 1231 protrude toward the second transparent substrate 1112, and the voltages between the second electrodes 142 and the second common electrode 132 are adjusted to make the middle of the second interface 1232 protrude toward the first transparent substrate 1111, the liquid lens 10 forms a concave lens.

Referring to fig. 8, when the voltages between the first electrodes 141 and the first common electrode 131 are adjusted to make the middle of the first interface 1231 protrude toward the first transparent substrate 1111 and the voltages between the second electrodes 142 and the second common electrode 132 are adjusted to make the middle of the second interface 1232 protrude toward the second transparent substrate 1112, the liquid lens 10 forms a convex lens.

Referring to fig. 9, when the voltages between the first electrodes 141 and the first common electrode 131 and the voltages between the second electrodes 142 and the second common electrode 132 are respectively adjusted, the optical axis 101 of the first interface 1231 and the optical axis 101 of the second interface 1232 are deflected to one axial side of the enclosed cavity 11, so as to achieve the anti-shake function.

In an embodiment, referring to fig. 10, each group of driving electrodes 14 includes eight driving electrodes 14, and the eight driving electrodes 14 in each group are uniformly distributed on the peripheral side of the closed cavity 11, that is, eight first electrodes 141 and eight second electrodes 142, so as to more precisely control the position and curvature of each interface 123, and further more precisely adjust the deflection angle of the optical axis 101 of each interface 123. In other embodiments, each set of driving electrodes 14 includes three, five, six, seven, nine, ten, etc. driving electrodes 14, and particularly, if the first electrodes 141 are three, five, six, seven, nine, ten, etc., the corresponding second electrodes 142 may also be three, five, six, seven, nine, ten, etc. Of course, in some embodiments, the number of the first electrodes 141 is equal to the number of the second electrodes 142, and there is a one-to-one correspondence. In other embodiments, the number of the first electrodes 141 is not equal to the number of the second electrodes 142.

In one embodiment, referring to fig. 11, the common electrode 13 is a transparent conductive layer disposed on the corresponding transparent substrate 111, such as an ITO (Indium tin oxide) conductive layer can be formed on the transparent substrate 111, so that the liquid lens 10 can be made thinner.

In one embodiment, the conductive liquid 121 may be directly contacted with the corresponding common electrode 13 to electrically connect the conductive liquid 121 with the corresponding common electrode 13. In other embodiments, conductive pins protruding into the corresponding conductive liquid 121 may also be used to electrically connect the conductive pins with the corresponding common electrode 13.

In one embodiment, referring to fig. 12, the driving electrodes 14 are disposed on the outer surface of the dam 112, so as to dispose the driving electrodes 14 on the dam 112, isolate the driving electrodes 14 from the conductive liquid 121, and connect the driving electrodes 14 to an external circuit. In other embodiments, the driving electrodes 14 may be integrally formed in the dam 112, so that the driving circuit may be protected by the dam 112 and the dam 112 may be insulated and spaced from the conductive liquid 121.

In one embodiment, the outline of the liquid lens 10 is rectangular to facilitate mounting and fixing, and also to facilitate manufacturing. In other embodiments, the outer corridor of the liquid lens 10 may also be cylindrical.

In one embodiment, the inner cavity of the closed cavity 11 is cylindrical such that the liquid lens 10 forms a circular lens. In other embodiments, the inner cavity of the enclosed cavity 11 is rectangular such that the liquid lens 10 forms a rectangular lens. In some embodiments, the inner cavity of the closed cavity 11 may be provided with other shapes as required to manufacture a correspondingly shaped lens.

The liquid lens 10 of the embodiment of the application can realize focusing and anti-shaking functions on one lens, so that the size of the camera device using the liquid lens 10 can be smaller, and the thickness can be thinner. The liquid lens 10 of the embodiment of the application can be applied to an image pickup device which needs focusing and anti-shaking, the structure of the image pickup device can be simplified, and the size and the thickness of the image pickup device are reduced. Of course, the liquid lens 10 may be used in other devices requiring a lens.

Referring to fig. 13, an embodiment of the present application further discloses a camera module 100, which includes the liquid lens 10 according to any of the embodiments. The image pickup module 100 uses the liquid lens 10 according to any of the above embodiments, has focusing and anti-shake functions, and can reduce the volume of the image pickup module 100.

In one embodiment, referring to fig. 13 and 14, the image capturing module 100 further includes a lens module 213, a holder 211, and a flexible printed circuit 212, wherein the liquid lens 10 is mounted on the holder 211, the liquid lens 10 is supported by the holder 211, the holder 211 is mounted on the flexible printed circuit 212, the liquid lens 10 is electrically connected to the flexible printed circuit 212, that is, each common electrode 13 and each driving electrode 14 of the liquid lens 10 are electrically connected to the flexible printed circuit 212, the flexible printed circuit 212 is electrically connected to a circuit board 2131 of the lens module 213, and the lens module 213 can be a conventional image capturing lens, so that the image capturing module 100 has functions of focusing and anti-shake. This structure can add the liquid lens 10 to a conventional camera lens to increase focusing and anti-shake functions. In addition, a flexible wiring board 212 is provided to facilitate electrical connection with the circuit board 2131 of the lens module 213. Of course, in other embodiments, the liquid lens 10 may be directly electrically connected to the circuit board 2131 of the lens module 213.

In one embodiment, the holder 211 may be provided with a circuit therein, and the liquid lens 10 and the holder 211 are electrically connected through a wire 214, and the holder 211 is electrically connected to the flexible circuit board 212, so as to facilitate the electrical connection of the liquid lens 10 and the flexible circuit board 212, and also to reduce the volume of the camera module 100 and to stably support the liquid lens 10.

In one embodiment, the bracket 211 may be electrically connected to the flexible wiring board 212 by a conductive adhesive 215. In other embodiments, the bracket 211 may be fixed to the flexible circuit board 212, and the bracket 211 may be electrically connected to the flexible circuit board 212 by a conductive wire.

In an embodiment, referring to fig. 15, the image capturing module 100 further includes a supporting frame 221, a circuit board 222 and an image sensor 223, the liquid lens 10 is mounted on the supporting frame 221, the liquid lens 10 is supported by the supporting frame 221, the circuit board 222 is mounted on the supporting frame 221, the circuit board 222 is supported by the supporting frame 221, the image sensor is mounted on the circuit board 222, and the liquid lens 10 and the circuit board 222 are electrically connected, that is, each common electrode 13 and each driving electrode 14 of the liquid lens 10 are electrically connected to the circuit board 222. This module 100 of making a video recording both can focus, can realize the anti-shake again, and simple structure, and small, the equipment is convenient.

In one embodiment, referring to fig. 16, the camera module 100 further includes a lens barrel 224, and the liquid lens 10 is mounted in the lens barrel 224 to support the liquid lens 10 through the lens barrel 224.

In one embodiment, referring to fig. 16, a solid lens 225 is installed in the lens barrel 224, and the solid lens 225 may be a glass lens, a plastic lens, or the like, so as to combine with the liquid lens 10 for focusing to improve the image capturing quality.

The camera module 100 of the embodiment of the application can be applied to mobile terminals such as tablet computers, smart phones and smart watches. In some embodiments, the camera module 100 can also be applied to a camera, an unmanned aerial vehicle, or other devices requiring shooting.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A liquid lens, characterized in that: the device comprises a closed cavity with two ends being light-transmitting, two layers of conductive liquid filled at the two ends of the closed cavity and insulating liquid positioned between the two layers of the conductive liquid, wherein the refractive indexes of the conductive liquid and the insulating liquid are different, and two interfaces are formed between each layer of the conductive liquid and the insulating liquid; the both ends of closed cavity are equipped with respectively with two-layer the public electrode that the conducting liquid electricity is connected, the week side interval of closed cavity is equipped with and is used for adjusting two respectively interface curvature's two sets of driving electrode, and is two sets of driving electrode follows closed cavity axial interval sets up, wherein, the one end of closed cavity is the axial to the direction of the other end, and light can be followed closed cavity axial is passed closed cavity, two sets of driving electrode all with each layer the insulating interval of conducting liquid sets up, each group driving electrode includes around a plurality of driving electrode that the week side of closed cavity set up, each group driving electrode can be with the circular telegram of neighbouring public electrode.

2. The liquid lens of claim 1, wherein: one group of the driving electrodes comprises a plurality of first electrodes, the other group of the driving electrodes comprises a plurality of second electrodes, and the first electrodes and the second electrodes are arranged in a one-to-one correspondence mode.

3. The liquid lens of claim 1, wherein: the conductive liquid is the same density as the insulating liquid.

4. The liquid lens of claim 1, wherein: the surface tension of the conductive liquid is different from that of the insulating liquid.

5. The liquid lens of any one of claims 1-4, wherein: and an oleophylic hydrophobic layer is arranged on the inner wall of the closed cavity.

6. The liquid lens according to any one of claims 1 to 4, wherein: the closed cavity comprises two light-transmitting substrates arranged in parallel and a dam arranged between the two light-transmitting substrates, the driving electrode is arranged on the dam, and the two public electrodes are respectively arranged on the two light-transmitting substrates.

7. The liquid lens of claim 6, wherein: the driving electrodes are arranged on the inner surface of the dam, and an insulating layer covering each driving electrode is arranged in the closed cavity.

8. The liquid lens of claim 7, wherein: one end of each driving electrode, which is adjacent to the corresponding common electrode, extends outwards to form a connecting plate, and the insulating layer covers the connecting plates.

9. The liquid lens of claim 8, wherein: and notches exposing the connecting plates are formed in the edge of the light-transmitting substrate.

10. The liquid lens of claim 6, wherein: the common electrode is a conductive plate, and an opening is formed in the conductive plate corresponding to the middle area of the box dam; or the common electrode is a transparent conductive layer arranged on the corresponding light-transmitting substrate.

11. The liquid lens of claim 6, wherein: the driving electrode is arranged on the outer surface of the box dam, or the driving electrode is integrally formed in the box dam.

12. The module of making a video recording, its characterized in that: comprising a liquid lens according to any of claims 1-11.