A wire-wall multi-electrode controlled electrowetting driven liquid lens

Abstract

A wire-wall type multi-electrode controlled electrowetting driven liquid lens, the basic structure of which comprises a lens carrier (1), a dielectric electrowetting wire wall (2) and transparent upper and lower cover sheets; the main body of the lens carrier (1) is a through-hole structure, the dielectric electrowetting wire (3) is longitudinally wound between the inner wall and the outer wall of the through-hole in a row winding manner to form a wire turn, the wire wall is divided into n area blocks along the longitudinal direction, and the wire walls of each area block are electrically insulated; the dielectric electrowetting wire (3) is formed by a conductive wire core (5) wrapped with an insulating layer (6); transparent conductive liquid and insulating liquid with different refractive indices and immiscible with each other are stored in the through-hole as lens materials, and the shape of the curved interface is changed through the electrowetting effect with the dielectric electrowetting wire wall (2) to achieve optical zoom; after different control voltages are applied to different wire walls, the curved interface can be deformed, and the interface can also be deflected along the axial direction, so that an optical zoom lens or adjustable optical device with any pupil shape can be constructed.

Description

Technical Field

[0001] The patent of this invention relates to a novel wire-wall multi-electrode controlled electrowetting driven liquid lens structure and its working principle, and belongs to the technical field of photoelectric imaging, photoelectric sensing and optical information processing devices. Background Art

[0002] The traditional zoom system achieves zoom by moving the position of the lens relative to the photoelectric sensor. It is easily damaged by external forces and malfunctions, and the response time of the traditional zoom system is long. The liquid zoom lens system does not require any mechanical transmission device, and the system is not easily damaged by external forces. The liquid zoom lens achieves zoom by changing the shape of the liquid. Its response time is only a few milliseconds, and the focal length can be adjusted without mechanical movement. It has many advantages such as compact structure, flexible control, low manufacturing cost, no mechanical wear, and easy integration. It is expected to overcome the difficulties faced by traditional optical systems.

[0003] At present, the liquid zoom lens models developed internationally mainly include the following:

[0004] (a) Liquid-filled zoom lens, which changes the volume of liquid injected into the cavity to change the curvature of the film on the top surface of the cavity, thereby achieving the purpose of adjusting the focal length. The structure is simple and the price is low, but this lens requires an additional pump to provide pressure to change the curvature of the film on the top surface of the liquid. If the pressure is too high, it will cause devastating damage to the elastic film.

[0005] (b) Liquid crystal-based micro-zoom lens, which places the lens in a liquid crystal atmosphere and adjusts the refractive index of the liquid crystal by changing the applied voltage, thereby achieving control of the focal length of the lens. This type of lens is easy to array, but due to the non-uniformity of the liquid crystal in the electric field, it will cause large optical distortion.

[0006] (c) Fluid zoom lens based on dielectric electrowetting (EWOD), which uses an external voltage to adjust the curvature of the liquid surface, thereby changing the focal length of the lens. This type of lens has a compact structure and a large focal length adjustment range. The basic working principle of the fluid zoom lens based on dielectric electrowetting (EWOD) released by Philips is as follows: the lens material is composed of two immiscible liquids with different refractive indices, one is a conductive aqueous solution (high refractive index) and the other is a non-conductive oil (low refractive index). The two liquids are added to a short cylinder with transparent upper and lower surfaces. Since the side walls of the cylinder are treated with insulating hydrophobicity, the interface between the two liquids can form a stable curved surface, which acts as a lens. When an electric field perpendicular to the hydrophobic treatment surface is applied, the interfacial tension between the conductive aqueous solution and the side wall is reduced due to the electrowetting effect, thereby changing the shape of the interface between the two liquids, and ultimately causing a change in the focal length of the lens. The structure of Varioptic's liquid lens is similar to this. However, the materials used in their zoom lens solution are expensive, the device is complex, and the product yield is low. Summary of the invention

[0007] The purpose of the present invention is to propose a wire-wall type multi-electrode controlled electrowetting driven liquid lens structure, simplify the manufacturing process, improve the production technology, and solve the production cost problem of the liquid lens.

[0008] The present invention proposes a wire-wall type multi-electrode controlled electrowetting driven liquid lens structure, see Figure 1 , including a lens carrier 1, a dielectric electrowetting wire wall 2 and transparent upper and lower cover sheets; the main part of the lens carrier 1 is a through-hole structure, and the dielectric electrowetting wire 3 is wound between the inner wall and the outer wall of the through-hole in a row winding manner to form one or several layers of wire turns (somewhat similar to the winding method of a toroidal transformer), and the densely packed dielectric electrowetting wires 3 form a dielectric electrowetting wire wall 2 at the through-hole cavity wall, wherein the core component dielectric electrowetting wire 3 is formed by a conductive wire core 5 wrapped with an insulating layer 6, and a hydrophobic layer 7 can be coated on the outside of the insulating layer 6 to improve the hydrophobicity of the outer surface of the wire core, and sometimes the insulating layer and the hydrophobic layer are combined into one, see Figure 2 ; Therefore, the dielectric electrowetting wall contains two important elements of the electrowetting effect: a conductive layer and an insulating hydrophobic layer. Of course, the hydrophobic layer can also be applied after the wall is formed; the internal space of the through hole is sealed as a lens cavity 4 with transparent upper and lower cover sheets, and two or more transparent conductive liquids and insulating liquids with different refractive indices and immiscible with each other are stored in the cavity as lens materials.

[0009] If a surface of one of the upper and lower cover sheets that contacts the conductive liquid is provided with a transparent conductive layer, it can be led out as electrode I; when the cover sheet surface is not provided with a transparent conductive layer, other conductive materials are provided to contact the conductive liquid and be led out as electrode I, especially when the lens carrier 1 material is a conductive medium, it can directly contact the conductive liquid and can also be led out as electrode I; the taps of the dielectric electrowetting line 3 are merged into another electrode II for lead-out.

[0010] The zoom driving force of the variable liquid lens of the present invention comes from the electrowetting effect caused by the contact between the dielectric electrowetting line 3 and the conductive liquid under the action of voltage, which has nothing to do with the lens carrier 1. Therefore, the material of the lens carrier 1 can be a conductor or a non-conductor; the shape is not limited. When used as a lens, the shape is preferably a through-hole circular tube or a through-hole cone as shown in Figure 3. When used as other adjustable optical components, any other shape can be selected.

[0011] The curved interface formed by the contact between the conductive liquid and the insulating liquid acts as a lens. Under the action of voltage, the interfacial tension between the conductive liquid and the dielectric electrowetting line wall 2 is reduced due to the electrowetting effect, thereby changing the shape of the curved interface to achieve tuning of the optical focal length.

[0012] Different from the general variable lens and liquid lens device, the lens of the present invention can set dielectric wetting walls according to the area, and each dielectric wetting wall can be independently applied with a control voltage. Figure 4 As shown, the inner wall of the carrier 1 is divided into n regions in the longitudinal direction, and different dielectric electrowetting wire segments are wound around each region. Each wire segment is electrically insulated to form n dielectric wetting walls. The taps of each wire segment are combined to lead out an electrode II to form an electrode group (II_1, II_2, ...II_n). Different control voltages can be applied to each electrode, which can cause the liquid contact surface to deform and deflect axially at the same time, thereby controlling the three-dimensional movement of the lens focus, and can also control the liquid curved surface to become a plane with controllable deflection direction.

[0013] The dielectric electrowetting wire wall 2 can be formed by n different dielectric electrowetting wires winding side by side along the inner wall longitudinally, and each wire can be independently applied with a control voltage signal, see Figure 5 .

[0014] Similarly, the dielectric electrowetting line wall 2 can also be set as a multi-layer line structure, and each layer can be individually applied with voltage control, see Figure 6 .

[0015] The dielectric electrowetting wire wall 2 can be provided with one or more layers of wire walls by thick wire cores, and then thin wires are provided between the gaps of the wire walls to improve the filling rate and flatness, see Figure 7 .

[0016] The dielectric electrowetting wire wall (2) can be provided with one or more layers of wire walls by means of a thin wire core, and then a layer of thick wires is sparsely provided on the side of the wire wall contacting the liquid to increase the contact area between the liquid and the wire wall, see Figure 8 .

[0017] When the dielectric electrowetting wire wall has a certain hardness, the lens matrix 1 can be discarded, and only the dielectric electrowetting wire wall can be used to construct the lens body, and adhesive can be applied to the outside of the wall to prevent the wall from leaking; or a weaving technology can be used, such as weaving the dielectric electrowetting wire into the lens cavity body, which also acts as the dielectric electrowetting wire wall, see Fig. 9 .

[0018] In addition, according to the stacking scheme based on the present invention, the liquids stored in the lens cavity 3 can be three or more liquids.

[0019] Beneficial effects: According to the above description, the present invention has the following characteristics:

[0020] This patent combines the wire-turn winding technology with modern optical technology to design a wire-wall multi-electrode controlled electrowetting driven liquid lens structure, which has important economic and technical value. The device designed by the invention has the advantages of simple structure, easy production and low cost.

[0021] The innovation lies in:

[0022] 1) Invented dielectric electrowetting wire, then applied this wire to the construction of liquid variable focus lens products and provided electrowetting effect drive. Transformed the production of the core component of the traditional liquid variable focus lens, the insulating dielectric layer that provides the electrowetting effect, into wire core processing with mature production technology, greatly simplified the production process and improved the yield rate. This broke the monopoly of foreign technology on liquid variable focus lenses and accelerated the localization of liquid variable focus lenses.

[0023] 2) Since the zoom driving force of the variable liquid lens of the present invention comes from the electrowetting effect between the dielectric electrowetting lines and the conductive liquid, and has nothing to do with the material and shape of the lens carrier, an optical variable focus lens with any pupil shape can be constructed, such as a triangular pupil, a quadrilateral or even a polygonal pupil, breaking the limitation of the circular pupil of the variable focus lens; adjustable optical devices with various special-shaped cavity structures can also be designed and prepared, which will bring a new world to the design and preparation of adjustable optical devices.

[0024] 3) The simple, easy and colorful control electrode settings bring unlimited possibilities for the control and application of adjustable optical devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of the structure of a wire-wall electrowetting driven liquid lens, in which there are 1-lens carrier, 2-dielectric electrowetting wire wall, 3-lens cavity, 4-dielectric electrowetting wire, and 8-electrode tap. The wire wall is divided into 3 areas, and there are 3 control electrode taps. Applying different voltages to each of them can change the interfacial tension of each dielectric electrowetting wall independently.

[0026] Figure 2 It is a schematic diagram of the dielectric electrowetting line structure, in which 5-conductive core, 6-insulating layer, 7-hydrophobic layer;

[0027] Figure 3A This is a schematic diagram of a through hole with a conical structure, in which the wiring can be arranged at an angle;

[0028] Figure 3B It is a schematic diagram of a through hole having a double cone-shaped structure;

[0029] Figure 4 This is the driving principle diagram of the four walls of the electrowetting liquid lens. The common electrode is the conductive liquid pin. The taps 4-1, 4-2, 4-3, and 4-4 are used as four control electrodes. Applying appropriate voltages to each of them can change the interfacial tension of the four surfaces of the dielectric electrowetting wall independently. The double liquid contact surface can be transformed into a plane, an inclined surface, etc., and the direction of the light can be controlled to move the focus at a certain angle.

[0030] Figure 5 It is a schematic diagram of an electrowetting line wall spacing line arrangement;

[0031] Figure 6 This is a schematic diagram of the electrowetting wire wall multi-layer wire arrangement structure;

[0032] Figure 7 It is one of the schematic diagrams of multi-layer and multi-core diameter cable arrangement of electrowetting wire wall;

[0033] Figure 8 This is the second schematic diagram of multi-layer and multi-core diameter cable arrangement of the electrowetting wire wall;

[0034] Fig. 9 It is a schematic diagram of the mesh electrowetting line wall and the lens carrier being combined into one;

[0035] FIG. 10 is a schematic diagram of bonding the electrowetting line wall to the lens carrier using the transfer method. DETAILED DESCRIPTION

[0036] The embodiment of the present application proposes a wire-wall-type electrowetting-driven liquid lens, which can be applied to a lens system with optical zoom requirements. The liquid lens device can be applied to an optical system with imaging functions, such as a microscope, a telescope, an artificial biological eye, etc.; it can also be applied to devices with camera functions, such as mobile phone lenses, cameras, CCD lenses, etc. The present application is not limited to the application scenarios of the lens device, and the above description is only an example.

[0037] Specifically, the liquid lens may include a through-hole lens carrier 1, a dielectric electrowetting line wall 2 formed by a dielectric electrowetting line 3 passing through the through-hole, and upper and lower cover sheets for encapsulating a transparent liquid; the dielectric electrowetting line 3 is formed by a conductive wire core 5 wrapped with an insulating layer 6, and a hydrophobic layer 7 may be coated on the outside if necessary; the dielectric electrowetting line 3 is passed through the inner wall and the outer wall of the through-hole in a winding manner to form a wire turn, forming a dielectric electrowetting line wall 2 at the through-hole cavity wall; the interior of the through-hole sealed by the transparent upper and lower cover sheets serves as a lens cavity 4, in which two or more conductive liquids and insulating liquids are stored as lens materials, which have different refractive indices and are immiscible, and the contact curved surface of the conductive liquid and the insulating liquid acts as a lens, and a voltage is applied between the electrode I and the electrode II, and the conductive liquid and the dielectric electrowetting line wall 2 undergo an electrowetting effect to reduce the surface tension of the liquid, thereby changing the shape of the liquid curved interface to achieve optical zoom.

[0038] Since the variable focus driving force of the variable liquid lens comes from the electrowetting effect between the dielectric electrowetting line 4 and the conductive liquid, and has nothing to do with the lens carrier 1, the lens carrier 1 can be made of a conductive material or a non-conductive material; the shape is also not limited. The shape used as a lens is preferably a through-hole circular tube or a Figure 3A Conical or Figure 3B The double cone shape shown is; when used as other adjustable optical components, any other shape can be selected.

[0039] Regarding the electrode settings, they are divided into common electrodes and control electrodes.

[0040] The following introduces the common electrode setting in three cases.

[0041] Solution 1: At least one of the upper and lower cover sheets has a surface provided with a transparent conductive layer, which is in full contact with the surface in contact with the conductive liquid and is led out as a common electrode I.

[0042] Solution 2: In order to minimize the reflection loss of light by the upper and lower cover plates, no transparent conductive layer is provided on the surface of the upper and lower cover plates. In this case, other conductive materials can be provided between the conductive liquid and the sealing cover plate to contact the conductive liquid and be led out as a common electrode I.

[0043] Solution three, when the lens carrier 1 is made of conductive material, the conductive liquid is in direct contact with the lens carrier and is led out as a common electrode I.

[0044] The control electrode setting can be diversified, for example, it can be set in the following six situations.

[0045] Solution 1: When a dielectric electrowetting line 3 is used to pass through the lens matrix 1 to form a dielectric electrowetting line wall 2, the control electrode is led out from any one of the two taps of the dielectric electrowetting line 3, or the two taps are combined into another electrode II.

[0046] Option 2: Figure 4 As shown, the lens mother body 1 is divided into multiple sections and the dielectric electrowetting line 3 is wound around. At this time, the dielectric electrowetting line wall 2 is divided into n independent units, such as walls 4_1, 4_2, 4_3, ..., and different control voltages are applied to each electrode tap. Each unit can independently undergo electrowetting. The control electrodes can be named II_1, II_2, ... II_n. In this case, each control electrode applies the same control voltage, then the curved interface of the liquid lens is a spherical surface, and the zoom control effect is the same as the aforementioned scheme 1; when each control electrode applies a different control voltage, the curved interface of the liquid lens can be deflected, and the optical axis of the lens can be deflected at a certain angle. When there is jitter in the lens system, the focus position can be changed by adaptively adjusting the control voltage, thereby improving the phenomenon of image quality degradation caused by jitter. In addition, it can also be used as an extension, for example, it can be used as a cascade, and the liquid contact surface can also be transformed into an aspherical application.

[0047] Option 3: Figure 5 As shown, the dielectric electrowetting wire wall 2 can be formed by n different dielectric electrowetting wires winding side by side along the inner wall longitudinally, such as 5_1, 5_2, 5_3, ..., each wire core periodically appears on the dielectric electrowetting wire wall, and each wire core can be independently applied with a control voltage signal to prepare for the need for periodic control of electrodes in certain occasions.

[0048] Option 4: Figure 6 As shown, the dielectric electrowetting line wall 2 can also be set as a multi-layer line array structure, such as 6_1, 6_2, ..., and each layer can be independently applied with voltage control.

[0049] Option 5: Figure 7 As shown, the dielectric electrowetting wire wall 2 can be provided by providing one or more layers of wire wall 7_1 with a thick wire core, and then providing thin wires 7_2 between the gaps of the wire wall to improve the filling rate and flatness.

[0050] Option 6: Figure 8As shown, the dielectric electrowetting wire wall 2 can be provided with one or more layers of wire wall 8_1 by thin wire cores, and then one or more layers of thick wires 8_2 are sparsely provided on the side of the wire wall contacting the liquid using thick wires to increase the contact area between the liquid and the wire wall.

[0051] The liquids stored in the lens cavity 3 may be three or more liquids.

[0052] Specific embodiment 1: The lens matrix 1 can be made of a metal cylinder or a cone cylinder, which is treated for rust prevention, and the typical value of the inner diameter can be 0.1mm-100mm. The dielectric electrowetting wire conductive wire core 5 is preferably but not limited to a soft metal thin conductive wire, such as copper wire, silver wire, gold wire, aluminum wire, iron wire or tantalum, niobium, etc., and can also be made of non-metallic conductive materials such as conductive silicone rubber. According to the different inner diameters of the cylinder (cone), wire cores with different core diameters can be selected, ranging from micrometers to millimeters. The outer periphery of the wire core is evaporated or coated with micrometer-level parylene as an insulating layer, and the typical value can be 1-10 micrometers. Insulating dielectric materials commonly used in capacitors can also be selected, such as tantalum (niobium) oxide, aluminum oxide and other high dielectric constant materials to reduce the driving voltage. The hydrophobic layer mainly plays a hydrophobic modification role, so it is achieved by using a polytetrafluoroethylene polymer material coating below the micrometer level or even the nanometer level. The surface microstructure can also be made on the outside of the insulating layer to improve the hydrophobicity. The hydrophobic layer can also be coated separately after the electrowetting wire core wall is set. According to different needs, the shape of the wire core end face can be diversified, including round, elliptical, rounded rectangular, etc.

[0053] A wire shuttle or other processing tool is used to longitudinally wind one or more layers of wire turns between the inner wall and the outer wall of the circular (conical) cylinder through hole in a row winding manner. Thus, the dielectric electrowetting wires are arranged in a longitudinal manner, and a dielectric electrowetting wire wall with the same distribution as the inner wall of the circular (conical) cylinder through hole is formed at the through hole cavity wall. Adhesive or ultraviolet curing glue can be pre-coated between the wire wall and the inner wall of the through hole cavity for fixing. The wire wall can be set in a variety of ways. For example, multiple layers of wire walls can be set, each layer is controlled by different electrodes, each layer of wire wall can be divided into n parts longitudinally and controlled by different electrodes, and the wires of the wire wall can be set with different thicknesses. For example, a layer of wire wall is first set with thick wires, and then thin wires are set between the thick wires to increase the filling ratio and surface flatness; or one or more layers of wire walls are first set with thin wire cores, and then one or more layers of thick wires are sparsely set on the side of the wire wall contacting the liquid using thick wires to increase the contact area between the liquid and the wire wall.

[0054] The transparent upper and lower covers are made of high-performance thin glass sheets (such as the biochemical experiment cover glass of model WESTChester, PA19380 produced by VWR Scientific), which has good toughness and high light transmittance; the conductive layer of the transparent cover can be realized by an ITO layer prepared by a vacuum coating method. The insulating liquid is bromododecane (density 1.0399, refractive index 1.4583), and the conductive liquid is a salt water solution with the same density as it to eliminate the influence of gravity.

[0055] Specific embodiment 2: Since the conductivity of the lens matrix 1 is not a core factor, a non-metallic cylinder or conical cylinder made of silicone rubber or plastic can be used. This is because silicone rubber is easy to shape and can be mass-produced through mold injection molding. If the matrix is ​​required to be conductive, a conductive medium can be added to the above materials to make conductive silicone rubber or plastic. The dielectric electrowetting line can be completed with reference to the method for making polyesterimide / polyamideimide composite layer enameled wire, but the thickness of the insulating layer is controlled within 10 microns to reduce the control voltage of the electrowetting effect. After the dielectric electrowetting line wall is installed in place on the lens matrix 1, the hydrophobic layer can be realized by dipping the hydrophobic agent FOTs on the surface of the line wall to increase the initial contact angle of the liquid. The conductive fluid uses lithium chloride aqueous solution or sodium sulfate aqueous solution, and the insulating fluid uses phenylmethylsiloxane.

[0056] Specific embodiment 3: Since the zoom driving force of the variable liquid lens of the present invention comes from the electrowetting effect between the dielectric electrowetting line 3 and the conductive liquid, and has nothing to do with the material and shape of the lens carrier 1, an optical variable focus lens with any pupil shape can be constructed, such as a triangular pupil, a quadrilateral or even a polygonal pupil, which breaks through the limitation of the circular pupil of the variable focus lens; various adjustable optical devices with special-shaped cavity structures can also be designed and prepared, combined with a simple, easy and colorful control electrode design, which will definitely bring a new world to the design and preparation of adjustable optical devices, and thus construct other optical adjustable devices. The upper and lower cover plates are selected from chemically strengthened optical glass or other similar materials used in the production of mobile phone screens, such as sodium silicate glass materials, Corning Gorilla Glass, or organic glass used in the production of OLEDs.

[0057] Specific embodiment 4: Since the existence of the lens matrix 1 is only to assist the shape of the lens, when the dielectric electrowetting wire wall has a certain hardness, the lens matrix 1 can be discarded, and only the dielectric electrowetting wire wall is used to construct the lens body. In order to prevent the wall from leaking, glue is brushed on the outside of the wall. Another situation is to use weaving technology, for example, weaving the dielectric electrowetting wire into the lens cavity body. At this time, the dielectric electrowetting wire also acts as a dielectric electrowetting wire wall. The third situation is that the dielectric electrowetting wire can be arranged on a three-dimensional column complementary to the lens cavity, and then transferred to the cavity wall of the lens matrix 1, see Fig. 10A and Fig. 10B Using tantalum pentoxide (Ta2O5) with a relative permittivity of up to 20 or niobium pentoxide (Nb2O5) with a relative permittivity of 35-50 as the insulating dielectric layer of the dielectric electrowetting line can greatly reduce the device driving voltage.

[0058] Specific embodiment 5: The manufacturing process of the dielectric electrowetting line can be that the conductive inner core is made of metal aluminum material, and the insulating dielectric layer is set as a dense aluminum oxide film. The aluminum oxide film can be prepared by vapor deposition, liquid chemical deposition, and electrochemical method, especially the oxide film prepared by electrochemical method, which is wrapped with a porous layer and can be used as a hydrophobic layer.

[0059] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A wire-wall type multi-electrode controlled electrowetting driven liquid lens, characterized in that: The wire-wall type multi-electrode controlled electrowetting driven liquid lens comprises a lens carrier (1), a dielectric electrowetting wire wall (2) and transparent upper and lower cover sheets; the main body of the lens carrier (1) is a through-hole structure, the dielectric electrowetting wire (3) is longitudinally wound between the inner wall and the outer wall of the main body in a row winding manner to form a wire turn, and a dielectric electrowetting wire wall (2) is formed on the inner wall of the through-hole, and the wire wall is divided into n area blocks in the longitudinal direction, and the wire walls of each area block are electrically insulated; the dielectric electrowetting wire (3) is composed of a conductive wire core (5) wrapped with an insulating layer (6) The through hole is sealed by transparent upper and lower cover sheets to form a lens cavity (4), in which transparent conductive liquid and insulating liquid having different refractive indices and being immiscible with each other are stored as lens materials, and the curved interface between the liquids acts as a lens. Through the electrowetting effect with the dielectric electrowetting line wall (2), the shape of the curved interface is changed to achieve optical zooming; after different control voltages are applied to n lines of the dielectric electrowetting line wall (2), the curved interface is deformed or the interface is deflected along the axial direction, thereby controlling the three-dimensional movement of the lens focus; The outer insulating layer (6) of the dielectric electrowetting line (3) is coated with a hydrophobic layer (7); if the hydrophobic layer (7) has insulating properties, the insulating layer (6) and the hydrophobic layer (7) are combined into one; if the dielectric electrowetting line (3) is not coated with a hydrophobic layer (7), a hydrophobic layer is coated on the contact surface between the dielectric electrowetting line wall (2) and the liquid; The surfaces of the upper and lower covers that are in contact with the conductive liquid are provided with a transparent conductive layer and are led out as a common electrode I; or other conductive materials are provided that are in contact with the conductive liquid and are led out as a common electrode I; or when the lens carrier (1) is made of a conductive material, the lens carrier is directly in contact with the conductive liquid and is led out as a common electrode I.

2. The wire-wall type multi-electrode controlled electrowetting driven liquid lens as claimed in claim 1, characterized in that: The taps of the dielectric electrowetting line (3) are connected to each other to lead out another control electrode II.

3. The wire-wall type multi-electrode controlled electrowetting driven liquid lens as claimed in claim 1, characterized in that: After specific control voltages are applied to n dielectric electrowetting wire walls (2), the liquid bending surface is controlled to become a plane for controlling the deflection direction.

4. The wire-wall type multi-electrode controlled electrowetting driven liquid lens as claimed in claim 1, characterized in that: The dielectric electrowetting line wall (2) is arranged as a multi-layer line array structure, and voltage control is applied to each layer individually.

5. The wire-wall type multi-electrode controlled electrowetting driven liquid lens as claimed in claim 1, characterized in that: The dielectric electrowetting line wall (2) is formed by n different dielectric electrowetting lines winding side by side along the inner wall longitudinally, and each line is independently applied with a control voltage signal.

6. The wire-wall type multi-electrode controlled electrowetting driven liquid lens as claimed in claim 1, characterized in that: The dielectric electrowetting wire wall (2) is provided by providing one or more layers of wire wall with a thick wire core, and then providing thin wires between the gaps of the wire wall to improve the filling rate and flatness.

7. The electrowetting driven liquid lens according to claim 1, characterized in that: The dielectric electrowetting wire wall (2) is provided by providing one or more layers of wire wall with a thin wire core, and then using thick wires to sparsely provide a layer of thick wires on the side of the wire wall contacting the liquid, so as to increase the contact area between the liquid and the wire wall.

8. The wire-wall type multi-electrode controlled electrowetting driven liquid lens as claimed in claim 1, characterized in that: When the dielectric electrowetting line wall (2) has a certain hardness, the lens carrier (1) is discarded and the dielectric electrowetting line wall (2) is used as the lens carrier.

Images