Liquid lens and method for manufacturing the same

Abstract

The application provides a liquid lens and a preparation method thereof, wherein the upper electrode of the liquid lens comprises symmetrically arranged upper electrode I and upper electrode II, the two ends of a first light-transmitting plate are connected to the upper electrode I and the upper electrode II respectively, the lower electrode comprises symmetrically arranged lower electrode I and lower electrode II, the two ends of a second light-transmitting plate are connected to the lower electrode I and the lower electrode II respectively; the thickness of the upper electrode near the end of the lower electrode I is greater than the thickness of the other end of the upper electrode, a sealing element is arranged between the upper electrode and the lower electrode, and the upper electrode, the lower electrode, part of the surface of the sealing element, and the first light-transmitting plate and the second light-transmitting plate form a closed cavity. By changing the thickness of different parts of the upper electrode, the reliability problem caused by the expansion of the liquid in the liquid lens is solved, the manufacturing difficulty and cost of the liquid lens are reduced, the manufacturing precision and consistency of the product are improved, the imaging quality is improved, and the application range of the liquid lens is further widened.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of optical technology, and relates to a liquid lens and a preparation method thereof. BACKGROUND

[0002] The liquid lens based on the principle of electrowetting is a base material of one or two liquids, and the purpose of zooming is achieved by changing the surface curvature of the liquid. The traditional solid lens zoom system needs to rely on a step / voice coil motor to drive one or more groups of lenses to move, and has the disadvantages of being difficult to miniaturize, slow zooming speed, high price, short service life, inconvenience for accurate control, and relatively poor reliability. The liquid lens based on the principle of electrowetting can perfectly solve these problems, and its special advantages are fast response speed and small structure occupying space.

[0003] However, the liquid lens filling liquid has a large thermal expansion coefficient, and is affected by temperature expansion and contraction. In order to ensure the reliability of the liquid lens, the current liquid lens adopts a complex structure, which not only increases the manufacturing difficulty of the liquid lens, but also increases the product cost, reduces the precision, and makes the product consistency poor. At the same time, the imaging quality of the liquid lens is reduced, and the application scene of the lens is greatly limited. Therefore, it is urgent to design and develop a liquid lens to meet the needs of actual industrial production while ensuring that the liquid lens is not affected by temperature, making the product structure simpler, reducing the manufacturing difficulty, and ensuring that the product obtains high imaging quality. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide a liquid lens and a preparation method thereof. In the present application, the liquid lens provided by changing the thickness of different parts of the upper electrode directly solves the reliability problem caused by the expansion of the liquid in the liquid lens, greatly reduces the manufacturing difficulty and cost of the liquid lens, and at the same time improves the manufacturing precision and consistency of the product, improves the imaging quality of the liquid lens, and further expands the application range of the liquid lens with high imaging quality.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a liquid lens, which comprises an upper electrode, a lower electrode, a first light-transmitting plate and a second light-transmitting plate, the upper electrode is detachably connected to the lower electrode, the upper electrode comprises an upper electrode one and an upper electrode two which are symmetrically arranged, two ends of the first light-transmitting plate are connected to the upper electrode one and the upper electrode two respectively, the lower electrode comprises a lower electrode one and a lower electrode two which are symmetrically arranged, two ends of the second light-transmitting plate are connected to the lower electrode one and the lower electrode two respectively; the thickness of the upper electrode near the lower electrode one end is greater than the thickness of the upper electrode at the other end, and a sealing element is arranged between the upper electrode and the lower electrode, and the upper electrode, the lower electrode, part of the surface of the sealing element, and the first light-transmitting plate and the second light-transmitting plate form a closed cavity, and the closed cavity is used for injecting liquid.

[0007] In the present application, the liquid lens provided by changing the thickness of different parts of the upper electrode directly solves the reliability problem caused by the expansion of the liquid in the liquid lens, greatly reduces the manufacturing difficulty and cost of the liquid lens, improves the manufacturing precision and consistency of the product, improves the imaging quality of the liquid lens, and further expands the application range of the liquid lens with high imaging quality.

[0008] As a preferred technical solution of the present application, the opposite side surfaces of the upper electrode one and the upper electrode two are both provided with assembly holes, and the two ends of the first light-transmitting plate are detachably connected to the assembly holes respectively.

[0009] It should be noted that the specific way of detachable connection is not specially limited in the present application, and those skilled in the art can make adaptive adjustment according to the actual situation. The detachable connection can be adhesion, buckling connection, etc.

[0010] It should be noted that the size and shape of the assembly hole are not specially limited in the present application, and those skilled in the art can make adaptive adjustment according to the actual situation. The size of the assembly hole matches the size of the edges of the two ends of the first light-transmitting plate, and the shape of the assembly hole also matches the assembly end of the first light-transmitting plate, which can be rectangular, square, oval, etc.

[0011] Further, in the present application, the upper electrode on the side close to the assembly hole should be thin enough to absorb the thermal expansion and contraction of the liquid to ensure the reliability of the product, and the thickness of the upper electrode and the lower electrode assembled at the other end should be thick enough to ensure the sealing strength and rigidity of the liquid lens, wherein the "thin enough" refers to the thickness of 0.05-0.1 mm, and the "thick enough" refers to the thickness of 0.1-0.5 mm.

[0012] The opposite side surfaces of the lower electrode one and the lower electrode are both provided with through holes, and the two ends of the second light-transmitting plate are detachably connected to the through holes respectively.

[0013] It should be noted that the size and shape of the through hole are not specially limited in the present application, and those skilled in the art can make adaptive adjustment according to the actual situation. The size of the through hole matches the size of the edges of the two ends of the second light-transmitting plate, and the shape of the through hole also matches the assembly end of the second light-transmitting plate, which can be rectangular, square, oval, etc.

[0014] Preferably, the through hole is arranged on the outer surface or inner wall of the lower electrode.

[0015] Preferably, when the through hole is arranged on the outer surface of the lower electrode, the second light-transmitting plate is arranged outside the surface of the lower electrode.

[0016] Preferably, when the through hole is arranged on the inner wall of the lower electrode, the second light-transmitting plate is inserted into the lower electrode.

[0017] It should be noted that in the liquid lens of the present application, the lower electrode is connected with the second light-transmitting plate in addition to the external arrangement scheme, that is, when the through hole is arranged on the outer surface of the lower electrode, the second light-transmitting plate is arranged outside the surface of the lower electrode; the internal arrangement scheme can also be used, that is, when the through hole is arranged on the inner wall of the lower electrode, the second light-transmitting plate is inserted into the lower electrode. When the internal arrangement scheme is used, the stability and reliability of the whole liquid lens can be improved, but the light transmission aperture of the liquid lens will be reduced.

[0018] As a preferred technical scheme of the present application, the material of the upper electrode includes any one of metal iron, iron alloy, metal copper, metal zinc, copper alloy, zinc alloy, copper-zinc alloy, metal aluminum and aluminum alloy.

[0019] It should be noted that the material of the upper electrode in the present application is not limited to the metal materials exemplified, but can also be other metal materials meeting the requirements. Those skilled in the art can make adaptive adjustment according to the actual situation. The specific shape of the upper electrode is not specially limited in the present application, and the upper electrode can be obtained by means of numerical control machine tool processing, sheet metal or mold forming, etc.

[0020] Preferably, the material of the lower electrode is metal or metal alloy.

[0021] Preferably, the surface of the lower electrode is provided with a metal plating layer or a metal oxide layer.

[0022] It should be noted that the lower electrode in the application can be various metals or metal alloy materials, such as Zn, Cu, Cr, Al or aluminum alloy, and those skilled in the art can make adaptive adjustments according to actual conditions. The surface of the lower electrode can be provided with a metal plating layer or a metal oxide layer, which can not only increase the adhesion between the hydrophobic film and the substrate, but also play an insulating role to improve the breakdown voltage of the liquid lens. The metal plating film, such as nickel, zinc, etc., can be prepared by electroplating, physical vapor deposition or vacuum magnetron sputtering deposition method. Among them, the metal oxide can be Al2O3, Ta2O5, etc.

[0023] As a preferred technical solution of the application, a first sealant layer is arranged between the first light-transmitting plate and the upper electrode.

[0024] A second sealant layer is arranged between the second light-transmitting plate and the lower electrode.

[0025] It should be noted that the specific material of the first sealant layer and the second sealant layer in the application is not specially limited, and those skilled in the art can make adaptive adjustments according to actual conditions. The material of the first sealant layer and the second sealant layer can be the same or different, and can be perfluoropolyether glue.

[0026] Preferably, the first light-transmitting plate and the second light-transmitting plate are both used for transmitting visible light.

[0027] Preferably, the material of the first light-transmitting plate and the second light-transmitting plate both includes a glass plate or a polymethyl methacrylate plate.

[0028] It should be noted that the thickness and size of the first light-transmitting plate and the second light-transmitting plate in the application are not limited, and the thickness and size of the first light-transmitting plate and the second light-transmitting plate can be adaptively adjusted according to actual conditions. Among them, only the first light-transmitting plate and the second light-transmitting plate can transmit visible light, and the material of the first light-transmitting plate and the second light-transmitting plate can be inorganic material or organic material.

[0029] As a preferred technical solution of the application, the opposite side surfaces of the lower electrode one and the lower electrode two are both inclined surfaces.

[0030] The reason why the opposite side surfaces of the lower electrode one and the lower electrode two are both inclined surfaces is that the inclined surface can reduce the working voltage of the liquid lens, and if it is not this structure, it may cause the working voltage of the liquid lens to be too high.

[0031] Preferably, the inclined surfaces form a flared structure, the two ends of the flared structure are small end and large end respectively, and the small end is close to the second light-transmitting plate.

[0032] Preferably, the included angle between the inclined surface and the second light-transmitting plate is a, and the angle of the a is 0-90°, for example, can be 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, but not limited to the listed values, other values not listed in the value range are also applicable.

[0033] The present application limits the included angle between the inclined surface and the second light-transmitting plate to a, and the angle of the a is 0-90°, because in this size range, a stable interface can be formed between the two liquids of the liquid lens, and if it is not in this range, the interface between the two liquids of the liquid lens can be unstable, reducing the optical imaging quality.

[0034] As a preferred technical solution of the present application, the contact surface side of the lower electrode and the liquid is provided with a dielectric film and a hydrophobic film.

[0035] Preferably, the hydrophobic film fully covers the surface of the dielectric film.

[0036] Preferably, the material of the dielectric film is any one or a combination of two or more of Teflon, parylene, tantalum pentoxide, aluminum oxide, and silicon nitride.

[0037] Preferably, the material of the hydrophobic film is fluoride or parylene.

[0038] Preferably, the fluoride includes perfluorinated resin and Teflon.

[0039] It should be noted that the dielectric film and the hydrophobic film in the present application can use the same material, that is, the material is both a dielectric film and a hydrophobic film. The dielectric film can prevent the lower electrode from being electrically broken down, and the hydrophobic film is used to obtain a larger initial contact angle to make the hysteresis of the lens smaller. The size and thickness of the dielectric film and the hydrophobic film are not specially limited by those skilled in the art, and those skilled in the art can make adaptive adjustments according to actual conditions.

[0040] Preferably, the contact angle between the hydrophobic film and the liquid is greater than 100°, for example, can be 101°, 110°, 120°, 130°, 150°, 200°, etc., but not limited to the listed values, other values not listed in the value range are also applicable.

[0041] The present application limits the contact angle between the hydrophobic film and the liquid to be greater than 100°, because this can ensure a faster response time of the liquid lens.

[0042] As a preferred technical solution of the present application, the sealing member includes a sealing ring.

[0043] Preferably, the sealing member is arranged on part or all of the surface between the upper electrode and the lower electrode.

[0044] Preferably, when the sealing member is arranged on part of the surface between the upper electrode and the lower electrode, the end of the upper electrode with small thickness does not contact the lower electrode, and the end of the upper electrode with large thickness partially contacts the lower electrode.

[0045] Preferably, when the sealing member is arranged on all of the surface between the upper electrode and the lower electrode, the upper electrode and the lower electrode do not contact.

[0046] It should be noted that in the present application, by arranging the sealing member on part or all of the surface between the upper electrode and the lower electrode, the upper electrode and the lower electrode are partially or fully contacted, thereby improving the feasibility of the technical solution of the present application.

[0047] Preferably, the sealing member comprises a circular ring structure.

[0048] Preferably, the material of the sealing member is any one of polytetrafluoroethylene, parylene or perfluorocyclic polymer.

[0049] It should be noted that the sealing member in the present application plays a sealing role, and the specific material, shape and size of the sealing member are not specially limited, and can be adaptively adjusted by those skilled in the art according to actual conditions.

[0050] As a preferred technical solution of the present application, the side of the upper electrode close to the lower electrode is coated with a wear-resistant insulating coating.

[0051] Preferably, the wear-resistant insulating coating comprises a carbon-based inorganic material layer, and is further preferably a diamond-like coating.

[0052] It should be noted that the thickness and specific material of the wear-resistant insulating coating are not specially limited in the present application, and can be adaptively adjusted by those skilled in the art according to actual conditions. By coating the wear-resistant insulating coating on the side of the upper electrode close to the lower electrode, the present application ensures the effective insulation between the upper electrode and the lower electrode, and ensures that the wear-resistant insulating coating is not easy to fall off when the upper electrode and the lower electrode are sealed. The carbon-based inorganic material layer can be a silicon carbide wear-resistant coating, and the diamond-like coating can comprise a DLC coating.

[0053] As a preferred technical solution of the present application, the liquid comprises a conductive liquid and a non-conductive liquid.

[0054] Preferably, the conductive liquid contacts the second light-transmitting plate.

[0055] Preferably, the non-conductive liquid contacts the first light-transmitting plate.

[0056] Preferably, there is a liquid interface between the conductive liquid and the non-conductive liquid.

[0057] Preferably, the conductive liquid comprises any one or a combination of two or more of water, an alcohol solution or a salt solution.

[0058] It should be noted that the water in the present application can be deionized water, the alcohol solution can be ethanol, propylene glycol, etc., and the salt solution can be potassium chloride solution, etc., which can be adjusted according to the actual situation by those skilled in the art.

[0059] Preferably, the non-conductive liquid is an organic solvent.

[0060] Preferably, the organic solvent comprises silicone oil and chlorobenzene.

[0061] It should be noted that the liquid lens in the present application is connected to the power supply through the upper electrode and the lower electrode, and a voltage is applied. In the case where the power supply is not connected, the liquid interface between the conductive liquid and the non-conductive liquid forms a concave liquid surface, at this time, a negative focal power is formed. With the power supply connected and the voltage continuously increased, the liquid interface forms a convex liquid surface, at this time, a positive focal power is formed. The quantity of the conductive liquid and the non-conductive liquid in the present application is not limited, which can be adjusted according to the actual situation by those skilled in the art.

[0062] In a second aspect, the present application provides a preparation method of the liquid lens of the first aspect, the preparation method comprising:

[0063] The first light-transmitting plate is installed between the upper electrode one and the upper electrode two, the second light-transmitting plate is installed between the lower electrode one and the lower electrode two, the sealing member is installed between the upper electrode and the lower electrode, the upper electrode, the sealing member and the lower electrode are sealed by a necking process, and the liquid lens is obtained, and the upper electrode, the lower electrode, part of the surface of the sealing member, the first light-transmitting plate and the second light-transmitting plate are injected with liquid in the closed cavity.

[0064] Compared with the prior art, the present application has the following beneficial effects:

[0065] In the present application, the liquid lens provided directly solves the reliability problem caused by the expansion of the liquid in the liquid lens by changing the thickness of different parts of the upper electrode, greatly reduces the manufacturing difficulty and cost of the liquid lens, improves the manufacturing precision and consistency of the product, improves the imaging quality of the liquid lens, and further expands the application range of the liquid lens with high imaging quality. BRIEF DESCRIPTION OF DRAWINGS

[0066] Figure 1 The structure schematic diagram of the liquid lens provided for the first embodiment of the present application;

[0067] Figure 2 This is a schematic diagram of the upper electrode structure in the liquid lens provided in Embodiment 1 of the present invention;

[0068] Figure 3 This is a schematic diagram of the structure of the lower electrode in the liquid lens provided in Embodiment 1 of the present invention;

[0069] Figure 4 This is a schematic diagram of the structure of the liquid lens provided in Embodiment 2 of the present invention;

[0070] Figure 5 This is a schematic diagram of the structure of the seal in the liquid lens provided in Embodiment 2 of the present invention;

[0071] Figure 6 This is a schematic diagram of the structure of the liquid lens provided in Embodiment 3 of the present invention;

[0072] Figure 7 This is a schematic diagram of the structure of the lower electrode in the liquid lens provided in Embodiment 3 of the present invention;

[0073] Figure 8 This is a schematic diagram of the structure of the liquid lens provided in Embodiment 4 of the present invention;

[0074] Wherein, 1-upper electrode; 2-lower electrode; 3-sealing component; 4-first light-transmitting plate; 5-second light-transmitting plate; 6-conductive liquid; 7-non-conductive liquid; 8-first sealant layer; 9-second sealant layer; 10-dielectric film; 11-hydrophobic film; 12-wear-resistant insulating coating; 13-liquid interface. Detailed Implementation

[0075] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0076] In one specific embodiment, the present invention provides a liquid lens, such as... Figures 1 to 8 As shown, the liquid lens includes an upper electrode 1, a lower electrode 2, a first light-transmitting plate 4, and a second light-transmitting plate 5. The upper electrode 1 is detachably connected to the lower electrode 2. The upper electrode 1 includes an upper electrode one and an upper electrode two symmetrically arranged. The two ends of the first light-transmitting plate 4 are respectively connected to the upper electrode one and the upper electrode two. The lower electrode 2 includes a lower electrode one and a lower electrode two symmetrically arranged. The two ends of the second light-transmitting plate 5 are respectively connected to the lower electrode one and the lower electrode two. The thickness of the upper electrode 1 near the lower electrode is greater than the thickness of the other end of the upper electrode 1. A sealing element 3 is provided between the upper electrode 1 and the lower electrode 2. The upper electrode 1, the lower electrode 2, a portion of the surface of the sealing element 3, the first light-transmitting plate 4, and the second light-transmitting plate 5 constitute a closed cavity for injecting liquid.

[0077] In the present application, the liquid lens provided directly solves the reliability problem caused by the liquid expansion in the liquid lens by changing the thickness of different parts of the upper electrode 1, greatly reduces the manufacturing difficulty and cost of the liquid lens, and improves the manufacturing precision and consistency of the product, the imaging quality of the liquid lens, and the application range of the liquid lens with high imaging quality.

[0078] The opposite side surfaces of the upper electrode one and the upper electrode two are provided with assembly holes, and the two ends of the first light-transmitting plate 4 are respectively detachably connected into the assembly holes.

[0079] In a possible implementation, the shape of the upper electrode 1 can be rectangular or trapezoidal, and the specific shape is not specially limited by those skilled in the art, and those skilled in the art can make adaptive adjustment according to the actual situation.

[0080] In another possible implementation, the shape of the lower electrode 2 can be rectangular, trapezoidal or square, and the specific shape is not specially limited by those skilled in the art, and those skilled in the art can make adaptive adjustment according to the actual situation.

[0081] It should be noted that the size and shape of the assembly hole are not specially limited by the present application, and those skilled in the art can make adaptive adjustment according to the actual situation. The size of the assembly hole matches the size of the edges of the two ends of the first light-transmitting plate 4, and the shape of the assembly hole also matches the assembly end of the first light-transmitting plate 4, which can be rectangular, square, elliptical, etc.

[0082] Further, in the present application, the upper electrode 1 on the side close to the assembly hole should be thin enough to absorb the thermal expansion and contraction of the liquid to ensure the reliability of the product, and the thickness of the upper electrode 1 and the lower electrode 2 at the other end should be thick enough to ensure the sealing strength and rigidity of the liquid lens, wherein the "thin enough" refers to the thickness of 0.05-0.1 mm, and the "thick enough" refers to the thickness of 0.1-0.5 mm.

[0083] The opposite side surfaces of the lower electrode one and the lower electrode 2 are provided with through holes, and the two ends of the second light-transmitting plate 5 are respectively detachably connected into the through holes.

[0084] It should be noted that the size and shape of the through hole are not specially limited by the present application, and those skilled in the art can make adaptive adjustment according to the actual situation. The size of the through hole matches the size of the edges of the two ends of the second light-transmitting plate 5, and the shape of the through hole also matches the assembly end of the second light-transmitting plate 5, which can be rectangular, square, elliptical, etc.

[0085] The through hole is arranged on the outer surface or inner wall of the lower electrode 2, when the through hole is arranged on the outer surface of the lower electrode 2, the second light-transmitting plate 5 is arranged outside the surface of the lower electrode 2, and when the through hole is arranged on the inner wall of the lower electrode 2, the second light-transmitting plate 5 is arranged inside the lower electrode 2.

[0086] It should be noted that the lower electrode 2 of the liquid lens in the present application is connected with the second light-transmitting plate 5, in addition to the external arrangement scheme, that is, when the through hole is arranged on the outer surface of the lower electrode 2, the second light-transmitting plate 5 is arranged outside the surface of the lower electrode 2, and the internal arrangement scheme can also be used, that is, when the through hole is arranged on the inner wall of the lower electrode 2, the second light-transmitting plate 5 is arranged inside the lower electrode 2, wherein the internal arrangement scheme can improve the stability and reliability of the whole liquid lens, but the light transmission aperture of the liquid lens is reduced.

[0087] The material of the upper electrode 1 includes any one of metal iron, iron alloy, metal copper, metal zinc, copper alloy, zinc alloy, copper-zinc alloy, metal aluminum and aluminum alloy. It should be noted that the material of the upper electrode 1 in the present application is not limited to the metal materials exemplified, but can also be other metal materials meeting the requirements, and those skilled in the art can make adaptive adjustments according to the actual situation. The specific shape of the upper electrode 1 is not specially limited in the present application, and the upper electrode 1 can be obtained by means of numerical control machine tool processing, sheet metal or die forming.

[0088] The material of the lower electrode 2 is metal or metal alloy, and the surface of the lower electrode 2 is provided with a metal plating layer or a metal oxide layer. It should be noted that the lower electrode 2 in the present application can be various metal materials, such as Zn, Cu, Cr, Al or aluminum alloy, and those skilled in the art can make adaptive adjustments according to the actual situation. The surface of the lower electrode 2 can be provided with a metal plating layer or a metal oxide layer, which can not only increase the adhesion between the hydrophobic film 11 and the substrate, but also play an insulating role to improve the breakdown voltage of the liquid lens. The metal plating film, such as nickel, zinc, etc., can be prepared by electroplating, physical vapor deposition or vacuum magnetron sputtering deposition, etc. The metal oxide can be Al2O3, Ta2O5, etc.

[0089] The first sealing glue layer 8 is arranged between the first light-transmitting plate 4 and the upper electrode 1, and the second sealing glue layer 9 is arranged between the second light-transmitting plate 5 and the lower electrode 2. It should be noted that the specific material of the first sealing glue layer 8 and the second sealing glue layer 9 is not specially limited in the present application, and those skilled in the art can make adaptive adjustments according to the actual situation. The material of the first sealing glue layer 8 and the second sealing glue layer 9 can be the same or different, and can be perfluoropolyether glue.

[0090] The first light-transmitting plate 4 and the second light-transmitting plate 5 are both used for transmitting visible light, and the material of the first light-transmitting plate 4 and the second light-transmitting plate 5 both includes glass plate or polymethyl methacrylate plate.

[0091] It should be noted that the thickness and size of the first light-transmitting plate 4 and the second light-transmitting plate 5 are not limited in the present application, and the thickness and size of the first light-transmitting plate 4 and the second light-transmitting plate 5 can be adjusted adaptively according to actual conditions. Wherein, only the first light-transmitting plate 4 and the second light-transmitting plate 5 can transmit visible light, and the material of the first light-transmitting plate 4 and the second light-transmitting plate 5 can be inorganic material or organic material.

[0092] The opposite side of the lower electrode one and the lower electrode two is a bevel, and the bevels form a flared structure, the two ends of the flared structure are a small end and a large end, the small end is close to the second light-transmitting plate 5, and the angle between the bevel and the second light-transmitting plate 5 is a, the angle of a is 0-90°.

[0093] The surface side of the lower electrode 2 in contact with the liquid is provided with a dielectric film 10 and a hydrophobic film 11, the hydrophobic film 11 fully covers the surface of the dielectric film 10, the material of the dielectric film 10 is any one or a combination of two or more of Teflon, parylene, tantalum pentoxide, aluminum oxide and silicon nitride; the material of the hydrophobic film 11 is fluoride or parylene, the fluoride includes perfluorinated resin and Teflon, the contact angle between the hydrophobic film 11 and the liquid is greater than 100°.

[0094] It should be noted that the dielectric film 10 and the hydrophobic film 11 in the present application can adopt the same material, that is, the material is both the dielectric film 10 and the hydrophobic film 11, the dielectric film 10 can prevent the lower electrode 2 from being electrically broken down, and the hydrophobic film 11 is to obtain a larger initial contact angle to make the hysteresis of the lens smaller; the size and thickness of the dielectric film 10 and the hydrophobic film 11 are not specially limited by those skilled in the art, and those skilled in the art can adjust adaptively according to actual conditions.

[0095] The sealing element 3 includes a sealing ring, and the sealing element 3 is arranged on part or all of the surface between the upper electrode 1 and the lower electrode 2; when the sealing element 3 is arranged on part of the surface between the upper electrode 1 and the lower electrode 2, the end of the upper electrode 1 with small thickness does not contact the lower electrode 2, and the end of the upper electrode 1 with large thickness partially contacts the lower electrode 2; when the sealing element 3 is arranged on all of the surface between the upper electrode 1 and the lower electrode 2, the upper electrode 1 and the lower electrode 2 do not contact.

[0096] It should be noted that in the present application, the sealing element 3 is arranged on part or all of the surface between the upper electrode 1 and the lower electrode 2, so that the upper electrode 1 and the lower electrode 2 are partially or fully contacted, thereby improving the feasibility of the technical scheme of the present application.

[0097] The sealing member 3 comprises a circular ring structure, and the sealing member 3 is made of any one of polytetrafluoroethylene, parylene or perfluorocyclic polymer.

[0098] The upper electrode 1 is coated with a wear-resistant insulating coating 12 on the side close to the lower electrode 2, and the wear-resistant insulating coating 12 comprises a carbon-based inorganic material layer, which can further be a diamond-like coating.

[0099] It should be noted that the thickness and specific material of the wear-resistant insulating coating 12 are not specially limited in the present application, and those skilled in the art can make adaptive adjustments according to the actual situation. By coating the wear-resistant insulating coating 12 on the side of the upper electrode 1 close to the lower electrode 2, the present application ensures the effective insulation between the upper electrode 1 and the lower electrode 2, and at the same time ensures that the wear-resistant insulating coating 12 is not easy to fall off when the upper electrode 1 and the lower electrode 2 are sealed.

[0100] The liquid comprises a conductive liquid 6 and a non-conductive liquid 7, the conductive liquid 6 is in contact with the second light-transmitting plate 5, the non-conductive liquid 7 is in contact with the first light-transmitting plate 4, and there is a liquid interface 13 between the conductive liquid 6 and the non-conductive liquid 7. Further, the conductive liquid 6 comprises any one or a combination of at least two or more of water, alcohol solution or salt solution; the non-conductive liquid 7 is an organic solvent, and further, the organic solvent comprises silicone oil and chlorobenzene.

[0101] It should be noted that the liquid lens in the present application is connected to the power supply through the upper electrode 1 and the lower electrode 2, and a voltage is applied. In the case where the power supply is not connected, the liquid interface 13 between the conductive liquid 6 and the non-conductive liquid 7 forms a concave liquid surface, at this time, a negative focal power is formed. With the power supply connected and the voltage continuously increased, the liquid interface 13 forms a convex liquid surface, at this time, a positive focal power is formed. The amount of the conductive liquid 6 and the non-conductive liquid 7 in the present application is not limited, and those skilled in the art can make adjustments according to the actual situation.

[0102] In another specific embodiment, the present application provides a preparation method of the liquid lens, which comprises:

[0103] The first light-transmitting plate 4 is installed between the upper electrode one and the upper electrode two, the second light-transmitting plate 5 is installed between the lower electrode one and the lower electrode two, the sealing member 3 is installed between the upper electrode 1 and the lower electrode 2, the upper electrode 1, the sealing member 3 and the lower electrode 2 are sealed by a necking process, and a liquid lens is obtained. The liquid is injected into the closed cavity formed by the part of the surface of the upper electrode 1, the lower electrode 2, the sealing member 3, the first light-transmitting plate 4 and the second light-transmitting plate 5.

[0104] Example 1

[0105] The embodiment provides a liquid lens, wherein:

[0106] The liquid lens comprises an upper electrode 1, a lower electrode 2, a first light-transmitting plate 4 and a second light-transmitting plate 5, the upper electrode 1 is detachably connected to the lower electrode 2, the upper electrode 1 comprises an upper electrode one and an upper electrode two which are symmetrically arranged, the two ends of the first light-transmitting plate 4 are connected to the upper electrode one and the upper electrode two respectively, the lower electrode 2 comprises a lower electrode one and a lower electrode two which are symmetrically arranged, the two ends of the second light-transmitting plate 5 are connected to the lower electrode one and the lower electrode two respectively, the thickness of the upper electrode 1 near the lower electrode one end is greater than the thickness of the other end of the upper electrode 1, a sealing element 3 is arranged between the upper electrode 1 and the lower electrode 2, and the upper electrode 1, the lower electrode 2, part of the surface of the sealing element 3, and the first light-transmitting plate 4 and the second light-transmitting plate 5 form a closed cavity, and the closed cavity is used for injecting liquid.

[0107] The opposite side surfaces of the upper electrode one and the upper electrode two are both provided with assembly holes, and the two ends of the first light-transmitting plate 4 are detachably connected to the assembly holes respectively. The opposite side surfaces of the lower electrode one and the lower electrode two are both provided with through holes, and the two ends of the second light-transmitting plate 5 are detachably connected to the through holes respectively.

[0108] The through hole is arranged on the outer surface of the lower electrode 2, and the second light-transmitting plate 5 is arranged outside the surface of the lower electrode 2.

[0109] The material of the upper electrode 1 is ferrous alloy. The material of the lower electrode 2 is aluminum alloy, and an aluminum oxide layer is arranged on the surface of the lower electrode 2. A first sealing glue layer 8 is arranged between the first light-transmitting plate 4 and the upper electrode 1, and a second sealing glue layer 9 is arranged between the second light-transmitting plate 5 and the lower electrode 2. The first light-transmitting plate 4 and the second light-transmitting plate 5 are both used for transmitting visible light, and the materials of the first light-transmitting plate 4 and the second light-transmitting plate 5 are both glass plates.

[0110] The opposite side surfaces of the lower electrode one and the lower electrode two are both inclined surfaces, and the inclined surfaces form an expanded structure, the two ends of the expanded structure are a small end and a large end respectively, the small end is close to the second light-transmitting plate 5, the included angle between the inclined surface and the second light-transmitting plate 5 is a, and the angle of a is 45°.

[0111] The surface side of the lower electrode 2 in contact with the liquid is provided with a dielectric film 10 and a hydrophobic film 11, the hydrophobic film 11 fully covers the surface of the dielectric film 10, the material of the dielectric film 10 is Teflon, the material of the hydrophobic film 11 is parylene, and the contact angle between the hydrophobic film 11 and the liquid is 110°.

[0112] The sealing element 3 comprises a sealing ring, the sealing element 3 is arranged on part of the surface between the upper electrode 1 and the lower electrode 2, the end of the upper electrode 1 with small thickness does not contact the lower electrode 2, and the end of the upper electrode 1 with large thickness partially contacts the lower electrode 2.

[0113] The sealing member 3 comprises a circular ring structure, and is made of polytetrafluoroethylene. The side of the upper electrode 1 close to the lower electrode 2 is coated with a wear-resistant insulating coating 12, which is a diamond-like coating.

[0114] The liquid comprises a conductive liquid 6 and a non-conductive liquid 7, the conductive liquid 6 is in contact with the second light-transmitting plate 5, the non-conductive liquid 7 is in contact with the first light-transmitting plate 4, and there is a liquid interface 13 between the conductive liquid 6 and the non-conductive liquid 7. Further, the conductive liquid 6 is water, and the non-conductive liquid 7 is silicone oil.

[0115] Embodiment 2

[0116] The embodiment provides a liquid lens, wherein:

[0117] The liquid lens comprises an upper electrode 1, a lower electrode 2, a first light-transmitting plate 4 and a second light-transmitting plate 5. The upper electrode 1 is detachably connected to the lower electrode 2. The upper electrode 1 comprises an upper electrode one and an upper electrode two arranged symmetrically. The two ends of the first light-transmitting plate 4 are connected to the upper electrode one and the upper electrode two respectively. The lower electrode 2 comprises a lower electrode one and a lower electrode two arranged symmetrically. The two ends of the second light-transmitting plate 5 are connected to the lower electrode one and the lower electrode two respectively. The thickness of the upper electrode 1 close to the lower electrode one is greater than the thickness of the other end of the upper electrode 1. A sealing member 3 is arranged between the upper electrode 1 and the lower electrode 2. The upper electrode 1, the lower electrode 2, part of the surface of the sealing member 3, and the first light-transmitting plate 4 and the second light-transmitting plate 5 form a closed cavity, and the closed cavity is used for injecting liquid.

[0118] The opposite side surfaces of the upper electrode one and the upper electrode two are both provided with assembly holes, and the two ends of the first light-transmitting plate 4 are detachably connected to the assembly holes respectively. The opposite side surfaces of the lower electrode one and the lower electrode two are both provided with through holes, and the two ends of the second light-transmitting plate 5 are detachably connected to the through holes respectively.

[0119] The through hole is arranged on the outer surface of the lower electrode 2, and the second light-transmitting plate 5 is arranged outside the surface of the lower electrode 2.

[0120] The material of the upper electrode 1 is ferrous alloy. The material of the lower electrode 2 is aluminum alloy.

[0121] A first sealing glue layer 8 is arranged between the first light-transmitting plate 4 and the upper electrode 1, and a second sealing glue layer 9 is arranged between the second light-transmitting plate 5 and the lower electrode 2. The first light-transmitting plate 4 and the second light-transmitting plate 5 are both used for transmitting visible light, and the materials of the first light-transmitting plate 4 and the second light-transmitting plate 5 are both polymethyl methacrylate plates.

[0122] The opposite side surfaces of the lower electrode one and the lower electrode two are both inclined surfaces, and the inclined surfaces form an expanded structure. The two ends of the expanded structure are a small end and a large end respectively. The small end is close to the second light-transmitting plate 5. The included angle between the inclined surface and the second light-transmitting plate 5 is a, and the angle a is 45°.

[0123] The surface side of the lower electrode 2 in contact with the liquid is provided with a dielectric film 10 and a hydrophobic film 11, the hydrophobic film 11 fully covers the surface of the dielectric film 10, the material of the dielectric film 10 is parylene; the material of the hydrophobic film 11 is perfluorinated resin, and the contact angle between the hydrophobic film 11 and the liquid is 120°.

[0124] The sealing member 3 includes a sealing ring, and the sealing member 3 is arranged on the entire surface between the upper electrode 1 and the lower electrode 2; the upper electrode 1 and the lower electrode 2 are not in contact.

[0125] The sealing member 3 includes a sealing member 3 with a circular ring structure, and the material of the sealing member 3 is parylene. The liquid includes a conductive liquid 6 and a non-conductive liquid 7, the conductive liquid 6 is in contact with the second light-transmitting plate 5, the non-conductive liquid 7 is in contact with the first light-transmitting plate 4, there is a liquid interface 13 between the conductive liquid 6 and the non-conductive liquid 7, further, the conductive liquid 6 is water; the non-conductive liquid 7 is chlorobenzene.

[0126] Embodiment 3

[0127] The embodiment provides a liquid lens, wherein:

[0128] The liquid lens includes an upper electrode 1, a lower electrode 2, a first light-transmitting plate 4 and a second light-transmitting plate 5, the upper electrode 1 is detachably connected to the lower electrode 2, the upper electrode 1 includes symmetrically arranged upper electrode one and upper electrode two, the two ends of the first light-transmitting plate 4 are respectively connected to the upper electrode one and the upper electrode two, the lower electrode 2 includes symmetrically arranged lower electrode one and lower electrode two, and the two ends of the second light-transmitting plate 5 are respectively connected to the lower electrode one and the lower electrode two; the thickness of the upper electrode 1 near the lower electrode one end is greater than the thickness of the other end of the upper electrode 1, and the sealing member 3 is arranged between the upper electrode 1 and the lower electrode 2, and the upper electrode 1, the lower electrode 2, part of the surface of the sealing member 3, and the first light-transmitting plate 4 and the second light-transmitting plate 5 form a closed cavity, and the closed cavity is used for injecting liquid.

[0129] The opposite side surfaces of the upper electrode one and the upper electrode two are respectively provided with assembly holes, and the two ends of the first light-transmitting plate 4 are respectively detachably connected to the assembly holes. The opposite side surfaces of the lower electrode one and the lower electrode two are respectively provided with through holes, and the two ends of the second light-transmitting plate 5 are respectively detachably connected to the through holes.

[0130] The through hole is arranged on the inner wall of the lower electrode 2, and the second light-transmitting plate 5 is inserted into the lower electrode 2.

[0131] The material of the upper electrode 1 is iron alloy. The material of the lower electrode 2 is aluminum alloy, and the surface of the lower electrode 2 is provided with an aluminum oxide layer. The first light-transmitting plate 4 and the upper electrode 1 are provided with a first sealing glue layer 8, and the second light-transmitting plate 5 and the lower electrode 2 are provided with a second sealing glue layer 9. The first light-transmitting plate 4 and the second light-transmitting plate 5 are used for transmitting visible light, and the materials of the first light-transmitting plate 4 and the second light-transmitting plate 5 are both glass plates.

[0132] The opposite side of the lower electrode one and the lower electrode two is a bevel, and the bevels form a flared structure, the two ends of the flared structure are a small end and a large end, the small end is close to the second light transmission plate 5, the angle between the bevel and the second light transmission plate 5 is a, and the angle a is 45°.

[0133] The surface of the lower electrode 2 in contact with the liquid is provided with a dielectric film 10 and a hydrophobic film 11, the hydrophobic film 11 fully covers the surface of the dielectric film 10, the material of the dielectric film 10 is Teflon; the material of the hydrophobic film 11 is parylene, and the contact angle between the hydrophobic film 11 and the liquid is 110°.

[0134] The sealing member 3 includes a sealing ring, and the sealing member 3 is arranged on part of the surface between the upper electrode 1 and the lower electrode 2. The end of the upper electrode 1 with small thickness does not contact the lower electrode 2, and the end of the upper electrode 1 with large thickness partially contacts the lower electrode 2.

[0135] The sealing member 3 includes a circular ring structure, and the material of the sealing member 3 is polytetrafluoroethylene. The side of the upper electrode 1 close to the lower electrode 2 is coated with a wear-resistant insulating coating 12, and the wear-resistant insulating coating 12 is a diamond-like coating.

[0136] The liquid includes a conductive liquid 6 and a non-conductive liquid 7, the conductive liquid 6 contacts the second light transmission plate 5, the non-conductive liquid 7 contacts the first light transmission plate 4, and there is a liquid interface 13 between the conductive liquid 6 and the non-conductive liquid 7. Further, the conductive liquid 6 is water; and the non-conductive liquid 7 is silicone oil.

[0137] Embodiment 4

[0138] The embodiment provides a liquid lens, wherein:

[0139] The liquid lens includes an upper electrode 1, a lower electrode 2, a first light transmission plate 4 and a second light transmission plate 5. The upper electrode 1 is detachably connected to the lower electrode 2. The upper electrode 1 includes symmetrically arranged upper electrode one and upper electrode two. The two ends of the first light transmission plate 4 are respectively connected to the upper electrode one and the upper electrode two. The lower electrode 2 includes symmetrically arranged lower electrode one and lower electrode two. The two ends of the second light transmission plate 5 are respectively connected to the lower electrode one and the lower electrode two. The thickness of the upper electrode 1 close to the lower electrode one end is greater than the thickness of the other end of the upper electrode 1. A sealing member 3 is arranged between the upper electrode 1 and the lower electrode 2. Part of the surface of the upper electrode 1, the lower electrode 2, the sealing member 3, and the first light transmission plate 4 and the second light transmission plate 5 form a closed cavity. The closed cavity is used for injecting liquid.

[0140] The opposite side surfaces of the upper electrode one and the upper electrode two are respectively provided with assembly holes, and the two ends of the first light transmission plate 4 are respectively detachably connected to the assembly holes. The opposite side surfaces of the lower electrode one and the lower electrode two are respectively provided with through holes, and the two ends of the second light transmission plate 5 are respectively detachably connected to the through holes.

[0141] The through hole is arranged on the inner wall of the lower electrode 2, and the second light-transmitting plate 5 is inserted into the lower electrode 2.

[0142] The material of the upper electrode 1 is ferrous alloy, and the material of the lower electrode 2 is aluminum alloy.

[0143] The first sealing glue layer 8 is arranged between the first light-transmitting plate 4 and the upper electrode 1, and the second sealing glue layer 9 is arranged between the second light-transmitting plate 5 and the lower electrode 2. The first light-transmitting plate 4 and the second light-transmitting plate 5 are both used for transmitting visible light, and the materials of the first light-transmitting plate 4 and the second light-transmitting plate 5 are both polymethyl methacrylate plates.

[0144] The opposite sides of the lower electrode one and the lower electrode two are both inclined surfaces, and the inclined surfaces form an expanded structure, and the two ends of the expanded structure are a small end and a large end, respectively. The small end is arranged close to the second light-transmitting plate 5, and the included angle between the inclined surface and the second light-transmitting plate 5 is a, and the angle of a is 45°.

[0145] The surface side of the lower electrode 2 in contact with the liquid is provided with a dielectric film 10 and a hydrophobic film 11, the hydrophobic film 11 fully covers the surface of the dielectric film 10, the material of the dielectric film 10 is parylene, the material of the hydrophobic film 11 is perfluorinated resin, and the contact angle between the hydrophobic film 11 and the liquid is 120°.

[0146] The sealing element 3 includes a sealing ring, and the sealing element 3 is arranged on the entire surface between the upper electrode 1 and the lower electrode 2; the upper electrode 1 and the lower electrode 2 do not contact.

[0147] The sealing element 3 includes a sealing element 3 with a circular ring structure, and the material of the sealing element 3 is parylene. The liquid includes a conductive liquid 6 and a non-conductive liquid 7, the conductive liquid 6 is in contact with the second light-transmitting plate 5, the non-conductive liquid 7 is in contact with the first light-transmitting plate 4, there is a liquid interface 13 between the conductive liquid 6 and the non-conductive liquid 7, further, the conductive liquid 6 is water; and the non-conductive liquid 7 is chlorobenzene.

[0148] Example 5

[0149] The embodiment provides a liquid lens, wherein, different from example 1, part of the end surface of the upper electrode 1 is not coated with the wear-resistant insulating coating 12, and other parameters and structures are the same as those of example 1.

[0150] Comparative Example 1

[0151] The comparative example provides a liquid lens, wherein, different from example 1, the thickness of the upper electrode 1 is not distinguished, and other parameters and structures are the same as those of example 1.

[0152] Through the light transmission test of the liquid lens of examples 1-4 and example 5, it is found that the reliability of examples 1-4 is better than that of example 5, because the conduction between the upper and lower electrodes may be caused by no wear-resistant insulation coating, so that the liquid lens cannot work normally.

[0153] Through the light transmission test of the liquid lens of examples 1-4 and comparative example 1, it is found that the light transmission effect of examples 1-4 is better than that of comparative example 1 under high and low temperature, because the thickness of the upper electrode 1 is not distinguished under high and low temperature, which may cause the reliability problem after the liquid expansion or contraction or make the liquid lens deform seriously, the optical axis deviates, and the liquid lens cannot work normally.

[0154] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and those skilled in the art should understand that any changes or replacements within the technical scope disclosed by the present application can be easily thought by those skilled in the art, and all fall within the protection scope and disclosure scope of the present application.

Claims

1. A liquid lens, characterized in that, The liquid lens includes an upper electrode, a lower electrode, a first light-transmitting plate, and a second light-transmitting plate. The upper electrode is detachably connected to the lower electrode. The upper electrode includes an upper electrode one and an upper electrode two symmetrically arranged. The two ends of the first light-transmitting plate are respectively connected to the upper electrode one and the upper electrode two. The lower electrode includes a lower electrode one and a lower electrode two symmetrically arranged. The two ends of the second light-transmitting plate are respectively connected to the lower electrode one and the lower electrode two. The thickness of the upper electrode near the lower electrode is greater than the thickness of the other end of the upper electrode, and a sealing element is provided between the upper electrode and the lower electrode. The upper electrode, the lower electrode, a portion of the sealing element, the first light-transmitting plate, and the second light-transmitting plate constitute a closed cavity, which is used to inject liquid. The upper electrode one and the upper electrode two are each provided with mounting holes on their opposite sides, and the two ends of the first light-transmitting plate are respectively detachably connected to the mounting holes; The thickness of the upper and lower electrodes assembled together is greater than the thickness of the upper electrode on the side near the assembly hole. The thickness of the upper electrode on the side near the mounting hole is 0.05~0.1mm; The thickness of the upper and lower electrodes assembled at the other end is 0.1~0.5mm; The upper electrode is coated with a wear-resistant insulating coating on the side closest to the lower electrode; The wear-resistant insulating coating includes a carbon-based inorganic material layer; The wear-resistant insulating coating is a diamond-like coating.

2. The liquid lens according to claim 1, characterized in that, Both the lower electrode one and the lower electrode two have through holes on their opposite sides, and both ends of the second light-transmitting plate are detachably connected to the through holes.

3. The liquid lens according to claim 2, characterized in that, The through hole is provided on the outer surface or inner wall of the lower electrode.

4. The liquid lens according to claim 3, characterized in that, When the through hole is provided on the outer surface of the lower electrode, the second light-transmitting plate is placed outside the surface of the lower electrode.

5. The liquid lens according to claim 3, characterized in that, When the through hole is provided on the inner wall of the lower electrode, the second light-transmitting plate is inserted into the lower electrode.

6. The liquid lens according to claim 1, characterized in that, The material of the upper electrode includes any one of the following: iron, iron alloy, copper, zinc, copper alloy, zinc alloy, aluminum, and aluminum alloy.

7. The liquid lens according to claim 1, characterized in that, The lower electrode is made of metal.

8. The liquid lens according to claim 1, characterized in that, The surface of the lower electrode is provided with a metal plating layer or a metal oxide layer.

9. The liquid lens according to claim 1, characterized in that, A first sealant layer is provided between the first light-transmitting plate and the upper electrode; A second sealant layer is provided between the second light-transmitting plate and the lower electrode.

10. The liquid lens according to claim 1, characterized in that, Both the first and second light-transmitting plates are used to transmit visible light.

11. The liquid lens according to claim 1, characterized in that, The first and second light-transmitting plates are both made of glass or polymethyl methacrylate.

12. The liquid lens according to claim 1, characterized in that, Both the first and second lower electrodes have an inclined surface on their opposite sides.

13. The liquid lens according to claim 12, characterized in that, The inclined surfaces form an expanded structure, with a small end and a large end at each end, and the small end is positioned close to the second light-transmitting plate.

14. The liquid lens according to claim 12, characterized in that, The angle between the inclined plane and the second light-transmitting plate is α, and the angle α is 0~90°.

15. The liquid lens according to claim 1, characterized in that, A dielectric film and a hydrophobic film are provided on one side of the surface where the lower electrode contacts the liquid.

16. The liquid lens according to claim 15, characterized in that, The hydrophobic film completely covers the surface of the dielectric film.

17. The liquid lens according to claim 15, characterized in that, The dielectric film is made of any one or a combination of two or more of the following materials: Teflon, parylene, tantalum pentoxide, aluminum oxide, and silicon nitride.

18. The liquid lens according to claim 15, characterized in that, The hydrophobic membrane is made of fluoride or parylene.

19. The liquid lens according to claim 18, characterized in that, The fluorides include perfluorinated resins.

20. The liquid lens according to claim 15, characterized in that, The contact angle between the hydrophobic film and the liquid is greater than 100°.

21. The liquid lens according to claim 1, characterized in that, The sealing element includes a sealing ring.

22. The liquid lens according to claim 1, characterized in that, The sealing element is disposed on part or all of the surface between the upper electrode and the lower electrode.

23. The liquid lens according to claim 22, characterized in that, When the seal is disposed on a portion of the surface between the upper electrode and the lower electrode, the thinner end of the upper electrode does not contact the lower electrode, and the thicker end of the upper electrode partially contacts the lower electrode.

24. The liquid lens according to claim 22, characterized in that, When the seal is disposed on the entire surface between the upper electrode and the lower electrode, the upper electrode and the lower electrode do not contact each other.

25. The liquid lens according to claim 1, characterized in that, The seal includes a seal with a circular ring structure.

26. The liquid lens according to claim 1, characterized in that, The sealing element is made of any one of polytetrafluoroethylene, poly(p-xylene), or perfluorocyclic polymers.

27. The liquid lens according to claim 1, characterized in that, The liquid includes conductive liquids and non-conductive liquids.

28. The liquid lens according to claim 27, characterized in that, The conductive liquid is in contact with the second light-transmitting plate.

29. The liquid lens according to claim 27, characterized in that, The non-conductive liquid comes into contact with the first light-transmitting plate.

30. The liquid lens according to claim 27, characterized in that, There is a liquid interface between the conductive liquid and the non-conductive liquid.

31. The liquid lens according to claim 27, characterized in that, The conductive liquid includes any one or a combination of at least two or more of the following: water, alcohol solution, or salt solution.

32. The liquid lens according to claim 27, characterized in that, The non-conductive liquid is an organic solvent.

33. The liquid lens according to claim 32, characterized in that, The organic solvents include silicone oil and chlorobenzene.

34. A method for preparing a liquid lens according to any one of claims 1-33, characterized in that, The preparation method includes: The first light-transmitting plate is installed between the first upper electrode and the second upper electrode, the second light-transmitting plate is installed between the first lower electrode and the second lower electrode, and the sealing member is installed between the upper electrode and the lower electrode. The upper electrode, the sealing member, and the lower electrode are sealed by a necking process to obtain the liquid lens. Liquid is injected into the closed cavity formed by the upper electrode, the lower electrode, a portion of the sealing member, the first light-transmitting plate, and the second light-transmitting plate.

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