Liquid crystal lens, glasses, electronic product, and liquid crystal lens driving method

Abstract

The present invention belongs to the field of liquid crystal lens technology, specifically a liquid crystal lens, a driving method, glasses, and an electronic product. The liquid crystal lens of the present invention includes a liquid crystal layer, a first electrode layer, a second electrode layer, a first transparent substrate, and a second transparent substrate; the second electrode layer includes a plurality of electrode units, and the plurality of electrode units are arranged in sequence from a position close to the center of the second electrode layer to a position away from the center of the second electrode layer, and each of the electrode units includes at least one conductive wire, and the conductive wire extends from a first position of the electrode unit to a second position of the electrode unit, and the distance between the second position and the center of the second electrode layer is greater than the distance between the first position and the center of the second electrode layer, and the spacing between adjacent conductive wires is less than or equal to 100μm. The driving method of the liquid crystal lens of the present invention is simple, can obtain an ideal potential distribution, and is not affected by changes in the characteristics of the high-impedance film.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid crystal lenses, and in particular relates to a liquid crystal lens, glasses, an electronic product and a liquid crystal lens driving method. Background Art

[0002] In some application scenarios, it is necessary to be able to easily adjust the focal length of the lens. For example, users with both myopia and presbyopia need to be able to quickly and easily switch between the focal length that corrects their myopia and the focal length that corrects their presbyopia. For another example, current virtual reality (VR) and augmented reality (AR) products are mainly glasses and helmets. Different users have different degrees of myopia or presbyopia. After wearing VR / AR glasses or helmets, users need to manually change lenses to achieve clear viewing, which is very inconvenient.

[0003] In addition, the types of lenses that VR / AR glasses or helmets can provide are limited, so users with myopia need to wear myopia glasses and VR / AR glasses or helmets at the same time, and users with hyperopia need to wear hyperopia glasses and VR / AR glasses or helmets at the same time. This causes a strong sense of oppression and poor comfort for users.

[0004] At present, liquid crystal lenses are used to make lenses. This type of lens has a large number of electrodes set on the liquid crystal lens, and then the liquid crystal layer in the liquid crystal lens is formed by independently driving each electrode with different driving voltages to achieve a phase distribution that can achieve the lens effect, and the focal length of the formed liquid crystal lens is adjusted by changing the driving voltage of these electrodes. Although this method can adjust the focal length of the lens more conveniently, the number of electrodes that need to be independently controlled is large, the control method is complicated, and high-precision control cannot be achieved at a low cost. There are also spiral-shaped electrodes used to form an electric field to drive the liquid crystal lens to work. For example, the patent with international publication number WO2021 / 113963A1 uses spiral-structured electrodes and high-dielectric-constant materials to make liquid crystal lenses, and uses variable electrode width and spacing to generate a certain form of potential distribution. However, the shape of the electrodes in this method is relatively complex, the production cost is high, and the material properties of the high-dielectric-constant material are unstable, and the accuracy of the potential distribution cannot be maintained for a long time. Summary of the Invention

[0005] In view of this, the present invention provides a liquid crystal lens, glasses, electronic products and a liquid crystal lens driving method to solve the technical problems in the prior art of adjusting the focal length of the lens, such as the large number of electrodes that need to be independently driven and the complex control method.

[0006] The technical solution adopted in the present invention is:

[0007] In a first aspect, the present invention provides a liquid crystal lens comprising a liquid crystal layer, a first electrode layer, a second electrode layer, a first transparent substrate, and a second transparent substrate, wherein the first electrode layer and the second electrode layer are respectively located on opposite sides of the liquid crystal layer, the first transparent substrate is located on a side of the first electrode layer facing away from the liquid crystal layer, and the second transparent substrate is located on a side of the second electrode layer facing away from the liquid crystal layer;

[0008] The second electrode layer includes a plurality of electrode units, and the plurality of electrode units are arranged in sequence from a position close to the center of the second electrode layer to a position away from the center of the second electrode layer. Each of the electrode units includes at least one conductive wire, and the conductive wire extends from a first position of the electrode unit to a second position of the electrode unit. The distance between the second position and the center of the second electrode layer is greater than the distance between the first position and the center of the second electrode layer. The spacing between adjacent conductive wires is less than or equal to 100 μm. One end of the conductive wire is driven by a first voltage, and the other end is driven by a second driving voltage.

[0009] Preferably, the plurality of electrode units are configured to enable the liquid crystal in the liquid crystal layer to form a phase distribution equivalent to that of a Fresnel lens under the action of the first driving voltage and the second driving voltage.

[0010] Preferably, the electrode unit has one conductive wire, which includes a plurality of intermediate connecting segments and a plurality of concentric rings, and adjacent concentric rings are connected via the intermediate connecting segments.

[0011] Preferably, it also includes an electrode lead group, which includes a first electrode lead and a second electrode lead, and the conductive line of the electrode unit includes a plurality of curved segments arranged from the inside to the outside, each curved segment is disconnected at the electrode lead group, wherein one end of the curved segment located at the outermost periphery is electrically connected to the second electrode lead, and the other opposite end is connected to the adjacent curved segment on the same side of the electrode lead group, wherein one end of the innermost curved segment is electrically connected to the first electrode lead, and the other opposite end is connected to the curved segment of the adjacent segment on the same side of the electrode lead group, and one end of the remaining curved segments is connected to an adjacent curved segment on the same side of the electrode lead group, and the other opposite end is connected to another adjacent curved segment on the same side of the electrode lead group.

[0012] Preferably, the curved segment is an arc, and the spacing between adjacent conductive lines is the same.

[0013] Preferably, the conductive wire is in the shape of a spiral wire.

[0014] Preferably, the conductive line is in the form of a spiral obtained by a first spiral equation, wherein the first spiral equation is:

[0015] in

[0016] Where r is the radius in polar coordinates, g(r) is the polar angle, and a is the parameter of the equation.

[0017] Preferably, the shape of the conductive line is a spiral line obtained by a second spiral line equation, and the second spiral line equation is:

[0018]

[0019] in

[0020] Where r represents the radius in polar coordinates, g(r) is the polar angle, m is a parameter related to the liquid crystal material, and R is the curvature radius of the lens.

[0021] Preferably, the liquid crystal lens further comprises a conductive member, the projection of the conductive member on the second electrode layer is located at the junction of adjacent electrode units, and the conductive member is used to receive a third driving voltage. In a second aspect, the present invention provides glasses comprising the liquid crystal lens described in the first aspect.

[0022] In a third aspect, the present invention provides an electronic product, comprising a control circuit and the liquid crystal lens according to the first aspect, wherein the control circuit is electrically connected to the liquid crystal lens.

[0023] In a fourth aspect, the present invention provides a liquid crystal lens driving method for driving the liquid crystal lens described in the first aspect, assuming that the first driving voltage is V1 and the second driving voltage is V2, the method comprises the following steps:

[0024] S1: Obtaining the liquid crystal linear response voltage interval of the liquid crystal lens;

[0025] S2: Obtain the minimum voltage V in the liquid crystal linear working range according to the liquid crystal linear response voltage range. min and the maximum voltage V max ;

[0026] S3: According to the minimum voltage V min and the maximum voltage V max Adjust the voltage difference between V1 and V2 to adjust the optical power of the liquid crystal lens and / or switch the state of the liquid crystal lens between a positive lens and a negative lens, where V min ≤V1≤V max , and V min ≤V2≤V max .

[0027] Beneficial effects: The liquid crystal lens, glasses, electronic products and liquid crystal lens driving method of the present invention use conductive wires with a spacing of less than or equal to 100 μm and extending from a position close to the center of the second electrode layer to a position away from the center of the second electrode layer to form electrode units, and arrange the various electrode units in sequence from a position close to the center of the second electrode layer to a position away from the center of the second electrode layer. After the conductive wires are set in each electrode unit in the aforementioned manner, each electrode unit can accurately control the potential distribution of the corresponding annular zone area and make the potential of the corresponding annular zone area change smoothly. Since several electrode units are arranged in sequence from a position close to the center of the second electrode layer to a position away from the center of the second electrode layer, the annular zone areas corresponding to each electrode are also arranged in sequence from the center of the liquid crystal lens to the outside, and these annular zone areas together constitute the working area of ​​the liquid crystal lens. The present invention only needs to uniformly control the first driving voltage and the second driving voltage loaded on both ends of the conductive wire in each electrode unit to accurately control the potential distribution of the liquid crystal layer. The control method is simple and the effect of the liquid crystal lens is significantly improved. In addition, the present invention can achieve accurate distribution of the electric potential in the annular zone region without the need for a high-impedance film by adopting the aforementioned method. The accuracy of the electric potential distribution control is not affected by changes in the characteristics of the high-impedance film, so the liquid crystal lens has higher stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work, and these are all within the scope of protection of the present invention.

[0029] Figure 1 Schematic diagram of the three-dimensional structure of the liquid crystal lens of the present invention;

[0030] Figure 2 This is a schematic structural diagram of the second electrode layer of the first structural form of the present invention;

[0031] Figure 3 This is a schematic structural diagram of an electrode unit of the first structural form of the present invention;

[0032] Figure 4 Schematic diagram of the radial potential distribution of the liquid crystal lens of the present invention;

[0033] Figure 5 A schematic structural diagram of the second electrode layer of the second structural form of the present invention;

[0034] Figure 6 This is a schematic structural diagram of an electrode unit of a second structural form of the present invention;

[0035] Figure 7 Schematic diagram of the optimal curve of the present invention;

[0036] Figure 8 Schematic diagram of the optimal curve using different parameters of the present invention;

[0037] Figure 9 This is a schematic structural diagram of the second electrode layer of the third structural form of the present invention;

[0038] Figure 10 This is a schematic structural diagram of an electrode unit of a third structural form of the present invention;

[0039] Figure 11 This is a schematic flow chart of the liquid crystal lens driving method adopted in the present invention;

[0040] Figure 12 This is a schematic structural diagram of a liquid crystal lens driving device used in the present invention;

[0041] Figure 13 The potential distribution diagram near the voltage junction of the two electrodes when the third driving voltage is introduced without using a conductive member;

[0042] Figure 14 A schematic diagram of a structure in which a conductive member is provided at the junction of two adjacent electrode units;

[0043] Figure 15 This is a partial enlarged view of a conductive member provided at the junction of two adjacent electrode units;

[0044] Figure 16 The potential distribution diagram near the junction of the two electrode voltages when the conductive member is arranged on the side facing the second substrate and the third driving voltage is applied;

[0045] Figure 17 The potential distribution diagram near the junction of the two electrode voltages when the conductive member is arranged on the side facing away from the second substrate and the third driving voltage is applied;

[0046] Figure 18 This is an interference ripple diagram of the Fresnel liquid crystal lens of the present invention, in which the middle electrode unit adopts a concentric arc structure and is in a positive lens state;

[0047] Figure 19 This is an interference ripple diagram of the Fresnel liquid crystal lens in the present invention, in which the middle electrode unit adopts a concentric arc structure and is in a negative lens state.

[0048] Explanation of the accompanying drawings: first transparent substrate 10, first electrode layer 20, liquid crystal layer 30, second electrode layer 40, electrode unit 430, first electrode unit 43-1, second electrode unit 43-2, third electrode unit 43-3, conductive line 431, outermost curved segment 4311, innermost curved segment 4312, middle curved segment 4313, connecting segment 4314, middle connecting segment 4321, concentric rings 4322, electrode lead group 4110, first electrode lead 411, second electrode lead 412, second transparent substrate 50. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. Moreover, the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations, elements defined by the phrase "comprising..." do not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising the elements. The embodiments of the present invention and the features thereof may be combined with each other if there is no conflict, and all are within the scope of protection of the present invention.

[0050] Example 1

[0051] like Figure 1 As shown, this embodiment provides a liquid crystal lens, which includes a liquid crystal layer 30, a first electrode layer 20, a second electrode layer 40, a first transparent substrate 10 and a second transparent substrate 50. The first electrode layer 20 and the second electrode layer 40 are respectively located on opposite sides of the liquid crystal layer 30. The first transparent substrate 10 is located on the side of the first electrode layer 20 facing away from the liquid crystal layer 30, and the second transparent substrate 50 is located on the side of the second electrode layer 40 facing away from the liquid crystal layer 30.

[0052] The liquid crystal lens in this embodiment can adopt a layered structure. The first transparent substrate 10, the first electrode layer 20, the liquid crystal layer 30, the second electrode layer 40 and the second transparent substrate 50 are respectively located in different layers, and the aforementioned layers are stacked and arranged along the light transmission direction of the liquid crystal lens, that is, the normal direction of each layer. The arrangement method can be referred to Figure 1 As shown, in Figure 1 In the figure, along the light transmission direction of the liquid crystal lens, from bottom to top, there are a transparent substrate, a first electrode layer 20, a liquid crystal layer 30, a second electrode layer 40, and a second transparent substrate 50. The first transparent substrate 10 and the second transparent substrate 50 can be made of transparent materials with a certain strength and rigidity, such as a glass substrate, a plastic substrate, etc. The first substrate can support the liquid crystal lens. The first transparent substrate 10 can serve as a carrier for the first electrode layer 20, and the first electrode layer 20 can be plated on the first substrate. The second substrate also plays a supporting role and can also serve as a carrier for the second electrode layer 40, and the second electrode layer 40 can be plated on the second transparent substrate 50.

[0053] like Figure 2 、 Figure 5 and Figure 9 As shown, the second electrode layer 40 includes a plurality of electrode units 430, and the plurality of electrode units 430 are sequentially arranged from a position close to the center of the second electrode layer 40 to a position away from the center of the second electrode layer 40. Each of the electrode units 430 includes at least one conductive wire 431, and the conductive wire 431 extends from a first position of the electrode unit 430 to a second position of the electrode unit 430. The distance between the second position and the center of the second electrode layer 40 is greater than the distance between the first position and the center of the second electrode layer 40. The spacing between adjacent conductive wires 431 is less than or equal to 100 μm. Figure 2 As shown in the figure, d is the distance between adjacent conductive wires 431. In this embodiment, one end of the guide wire is driven by a first voltage, and the other end is driven by a second driving voltage. The first position can be the position where the electrode unit 430 is closest to the center of the second electrode layer 40, and the second position can be the position where the electrode unit 430 is farthest from the center of the second electrode layer 40.

[0054] Each electrode unit 430 corresponds to an annular zone, and each electrode unit 430 is used to control the potential distribution of the annular zone. Since a number of electrode units 430 are arranged in sequence from a position close to the center of the second electrode layer 40 to a position away from the center of the second electrode layer 40, the corresponding annular zones are also arranged in sequence from the center of the liquid crystal lens to the outside. These annular zones together constitute the working area of ​​the liquid crystal lens. In a specific implementation, one end of the conductive wire 431 of each electrode unit 430 can be connected to a power supply providing a first driving voltage through an electrode lead, so that the first driving voltage provided by the power supply is loaded to one end of the conductive wire 431 through the electrode lead, and then the other end of the conductive wire 431 is connected to a power supply providing a second driving voltage through an electrode lead, so that the second driving voltage provided by the power supply is loaded to the other end of the conductive wire 431 through the electrode lead.

[0055] This embodiment utilizes a conductive wire 431 having a certain resistance value, which gradually extends from a position of the electrode unit 430 near the center of the second electrode layer 40 to a position of the electrode unit 430 away from the center of the second electrode layer 40. Because the length of the conductive wire 431 is greater than its width and thickness, the conductive wire 431 is linear. The number of conductive wires 431 can be one or more. In this embodiment, the first electrode layer 20 is used to receive a common voltage, and the conductive wire 431 in each electrode unit 430 receives a first driving voltage at one end and a second driving voltage at the other end.

[0056] like Figure 4As shown, for an electrode unit 430, after applying a voltage in the aforementioned manner, since the conductive wire 431 has a certain length, the voltage on the conductive wire 431 gradually changes with the length position of the conductive wire 431. In addition, since the conductive wire 431 passes through various positions of the annular zone from the inside to the outside during the process of extending from the first position to the second position, the electric potential near the space through which the conductive wire 431 passes also changes gradiently as the conductive wire 431 extends from the first position to the second position. The electric field formed by the electrode unit 430 in the liquid crystal layer 30 also presents a gradient distribution along the radial direction. For example, the electric potential of the liquid crystal layer 30 in the annular zone region corresponding to the electrode unit 430 may change along the radial direction such that the electric potential gradually increases from the first position to the second position, and reaches a maximum at the second position. For another example, the electric potential of the liquid crystal layer 30 in the annular zone region of the electrode unit 430 may change along the radial direction such that the electric potential gradually decreases from the first position to the second position, and reaches a minimum at the second position. In this embodiment, the radial potential distribution within the electrode units 430 can be adjusted by setting the radial width of each electrode unit 430. Therefore, the radial width of each electrode unit 430 in this embodiment can be set as needed, without limitation. Because the arrangement of the liquid crystal directors can be electrically controlled, they exhibit different refractive index gradients in a non-uniform electric field. Therefore, applying a voltage with a certain gradient can induce a non-uniform distribution of the liquid crystal directors, resulting in a specific phase distribution for the outgoing light propagating through the liquid crystal layer 30. Therefore, in this embodiment, the potential distribution of the annular zones corresponding to each electrode unit 430 is adjusted by adjusting the first and second driving voltages, thereby adjusting the overall potential distribution of the liquid crystal lens and adjusting the focal length of the liquid crystal lens. Although multiple conductive wires 431 are provided in this embodiment, only two driving voltages are required to operate the liquid crystal lens. Furthermore, the optical power of the liquid crystal lens can be controlled by adjusting only one or both of these driving voltages, eliminating the need for independent control of each guide wire. This simplifies the control method, requires fewer electrode leads, and reduces cost.

[0057] This embodiment can control the potential distribution of the annular zone area corresponding to the cell electrode by setting the shape of the conductive wire 431 in each electrode unit 430. In order to more accurately control the potential distribution of the annular zone area corresponding to the electrode unit 430, a high-impedance film or a high-dielectric constant material is often filled around the conductive wire 431. However, high-impedance films and high-dielectric constant materials have the characteristic of unstable characteristics. Therefore, although the use of high-impedance films or high-dielectric constant materials can improve the accuracy of controlling the potential distribution, its stability cannot be guaranteed. This embodiment achieves high-precision potential distribution by setting the shape of the conductive wire 431 and setting the spacing between the conductive wires 431 to within 100μm, thereby forming an ideal potential distribution in the corresponding annular zone area without using a high-impedance film, and overcoming the influence of the poor stability of the high-impedance film or high-dielectric constant material on the liquid crystal lens effect.

[0058] In 1882, French physicist Augustin Jean Fresnel, based on the principle that surface curvature determines imaging characteristics in optical imaging, proposed that in the design of an optical lens, the surface curvature could be maintained constant, while the surface thickness could be reduced during processing. This design would still allow the lens to converge light, focusing incident light onto its surface to a focal point. In actual lens processing and application, a spherical lens can be considered as several discontinuous segments, with excess material removed between the segments. During processing, the original surface curvature is maintained, without affecting the deflection of light. Fresnel lenses are designed and processed based on this principle. The function of the aforementioned discontinuous segments is achieved by a series of concentric rings on the Fresnel lens. This embodiment can also utilize a liquid crystal lens to achieve an effect equivalent to that of a Fresnel lens. In this embodiment, the electrode units 430 are configured to cause the liquid crystal in the liquid crystal layer 30 to form a phase distribution equivalent to that of a Fresnel lens under the action of a first driving voltage and a second driving voltage.

[0059] like Figure 4As shown, each electrode unit 430 corresponds to a ring zone of a Fresnel lens. For any electrode unit 430, when the first drive voltage and the second drive voltage are applied, the electric field formed by this electrode unit 430 causes the liquid crystal in the corresponding region of the liquid crystal layer 30 to form a specific phase distribution. This specific phase distribution makes the light modulation effect of the liquid crystal layer 30 equivalent to the light modulation effect of the Fresnel ring zone on the corresponding Fresnel lens. All electrode units 430 combined are equivalent to a single Fresnel lens. This embodiment can also adjust the focal length of this liquid crystal lens equivalent to the Fresnel lens by adjusting the first drive voltage and the second drive voltage. In this embodiment, the conductive lines 431 of each electrode unit 430 can be made of a transparent conductive material. The aforementioned transparent conductive materials include but are not limited to ITO electrodes, IZO electrodes, FTO electrodes, AZO electrodes, IGZO electrodes, etc.

[0060] This embodiment can also achieve a change in the positive or negative optical power of the liquid crystal lens by changing the magnitude relationship between the first drive voltage and the second drive voltage applied to each electrode unit 430, thereby changing the liquid crystal lens from a negative lens to a positive lens or from a positive lens to a negative lens. For example, when the first drive voltage applied to the end of the conductive wire 431 near the electrode center is less than the second drive voltage applied to the end of the conductive wire 431 away from the electrode center, the liquid crystal lens of this embodiment has the characteristics of a convex lens, and the glasses made using the liquid crystal lens of this embodiment can be used as reading glasses. When the magnitude relationship between the first drive voltage and the second drive voltage is changed so that the first drive voltage applied to the end of the conductive wire 431 near the electrode center is greater than the second drive voltage applied to the end of the conductive wire 431 away from the electrode center, the liquid crystal lens of this embodiment has the characteristics of a concave lens, and the glasses made using the liquid crystal lens of this embodiment can be used as myopia glasses.

[0061] As one such method, when the number of conductive wires 431 in an electrode unit 430 is greater than or equal to 2, the conductive wires 431 of the electrode unit 430 are rotationally symmetric about a point in the second electrode layer 40. The rotationally symmetric distribution means that when the pattern formed by all conductive wires 431 is simultaneously rotated by an angle around a fixed point on the second electrode layer 40, the image formed by the new conductive wires 431 completely overlaps with the previous image. When the conductive wires 431 are rotationally symmetric about a point in the second electrode layer 40, the electric potential also forms a rotationally symmetric distribution.

[0062] When the number of conductive wires 431 is greater than or equal to 2, the electrode unit 430 further includes a first electrical connector and a second electrical connector, wherein the first electrical connector is used to provide the same first driving voltage to the ends of each conductive wire 431 electrically connected thereto. The second electrical connector is used to provide the same second driving voltage to the ends of each conductive wire 431 electrically connected thereto. As a preferred embodiment, in this embodiment, the spacing between adjacent conductive wires 431 is the same. As another preferred embodiment, in this embodiment, the width of the conductive wire 431 is the same at all locations. In addition, in this embodiment, when the spacing between adjacent conductive wires 431 is less than or equal to 100 μm, each electrode unit 430 can also use only one conductive wire 431 to obtain a more ideal potential distribution.

[0063] As one embodiment, when the electrode unit 430 has one conductive wire 431, the conductive wire 431 includes a plurality of intermediate connecting segments 4321 and a plurality of concentric rings 4322, and the adjacent concentric rings 4322 are connected by the intermediate connecting segments 4321. Figure 2 and Figure 3 As shown, for ease of understanding, different cross-section lines are used to represent different electrode units 430. For any electrode unit 430, the conductive line 431 is composed of a series of concentric rings 4322. These concentric rings 4322 fill the electrode unit 430 from the inside out, and adjacent concentric rings 4322 are connected end to end by an intermediate connecting section 4321 to form a complete conductive line 431. When using the above structure, electrode leads for passing driving voltage to each electrode unit 430 can be connected from below or above the second electrode layer 40.

[0064] In this embodiment, the conductive wires of the electrode unit 430 are arranged in a regular concentric ring structure, and the spacing between the wires does not need to be varied. A parabolic potential distribution can be formed when the spacing between adjacent wires is the same, which reduces the structural complexity and thus the manufacturing cost.

[0065] like Figure 5 and Figure 6As shown in FIG. 1 , as one implementation manner, in this embodiment, the conductive line 431 is in the shape of a spiral line. The starting point of the spiral line may be the position closest to the center of the second electrode layer 40 in the electrode unit 430. The spiral line extends in circles from the starting point along the circumferential direction toward the edge of the second electrode layer 40. In the process of the spiral line extending from the center of the second electrode layer 40 to the edge of the second electrode layer 40, the spiral line fills most of the area of ​​the electrode unit 430. The potential of the electrode unit 430 also gradually changes as the spiral line extends. Therefore, a relatively ideal potential distribution can be obtained when the spacing between adjacent conductive lines is less than or equal to 100 μm.

[0066] In this embodiment, the liquid crystal lens only needs to set the shape of the conductive line 431 to obtain a potential distribution that accurately meets the functional requirements of various liquid crystal lenses. The specific method for setting the shape of the conductive line 431 is as follows:

[0067] like Figure 7 As shown, in this embodiment, the conductive line 431 is in the shape of a spiral line obtained by a first spiral line equation, and the first spiral line equation is:

[0068] in

[0069] Where r is the radius in polar coordinates, g(r) is the polar angle, and a is the parameter of the equation.

[0070] like Figure 8 As shown, the size of a determines the density of the helical line. The larger a is, the denser the helical line is. By using the conductive wire 431 arranged in the above manner, a precise parabolic distribution of electric potential can be obtained, so that the wavefront distribution of the obtained liquid crystal lens also forms a precise parabolic distribution.

[0071] In this embodiment, the shape of the conductive line 431 is a spiral line obtained by a second spiral line equation, and the second spiral line equation is:

[0072]

[0073] in

[0074] Where r represents the radius in polar coordinates, g(r) is the polar angle, m is a parameter related to the liquid crystal material, and R is the curvature radius of the lens.

[0075] By employing the aforementioned arrangement of conductive wires 431, a precisely spherical potential distribution can be achieved, thereby ensuring that the resulting liquid crystal lens's wavefront distribution is also precisely spherical. A lens with a spherical wavefront offers the most ideal imaging results. However, conventional lenses require complex and meticulous external processing to achieve a near-spherical wavefront distribution. However, the present invention achieves a precisely spherical wavefront distribution simply by shaping the guide wires to meet the aforementioned requirements. This allows for a lens with a highly precise spherical wavefront distribution without the need for complex processing, significantly reducing manufacturing costs.

[0076] The shape of the conductive line 431 is a spiral line obtained by the third spiral line equation, and the third spiral line equation is:

[0077]

[0078] Where r represents the radius in polar coordinates, g(r) is the polar angle,

[0079] Where c is an arbitrary constant and a is a parameter of the equation.

[0080] By adopting the conductive wire 431 arranged in the aforementioned manner, a precise cone-shaped distribution of electric potential can be obtained, so that the wavefront distribution of the obtained liquid crystal lens also becomes a precise cone-shaped distribution.

[0081] As one implementation method, in this embodiment, the line shape of the electrode unit 430 is a parabola, and the mathematical equation representing the shape is: (Unit: μm).

[0082] As one implementation manner, in this embodiment, the shape of the conductive line 431 is an arc, and the mathematical equation representing the shape is: (Unit: μm).

[0083] As one implementation manner, in this embodiment, the conductive wire 431 is in the shape of an Archimedean spiral, and the mathematical equation of the shape is:

[0084] (Unit: μm).

[0085] The Archimedean spiral is an equidistant spiral, meaning it extends outward at equal distances. In the parametric equation for a spiral, k represents the period it takes for the spiral to extend from the center to the edge.

[0086] As a preferred implementation manner, in this embodiment, the line shape of the electrode unit 430 is a Fermat spiral, and the mathematical equation of the shape is:

[0087] (Unit: μm).

[0088] The difference between the Fermat spiral and the Archimedean spiral is that as the spiral expands outward, the spiral radius increases nonlinearly, and the further it expands outward, the slower the increase in the spiral radius. Figure 9 and Figure 10 As shown, Figure 9 The second electrode layer in the embodiment is provided with three electrode units, which are respectively a first electrode unit 43-1, a second electrode unit 43-2 and a third electrode unit 43-3 from the inside to the outside.

[0089] In this embodiment, the second electrode layer 40 further includes an electrode lead assembly 4110, which includes a first electrode lead 411 and a second electrode lead 412. The first electrode lead 411 is electrically connected to an end of the conductive wire 431 in the electrode unit 430 that is close to the electrode center, while the second electrode lead 412 is electrically connected to an end of the conductive wire 431 in the electrode unit 430 that is away from the electrode center. Both the first electrode wire and the second electrode wire extend outward from a position close to the center of the second electrode layer 40.

[0090] In this embodiment, the conductive line 431 of the electrode unit 430 includes a plurality of curved segments arranged from the inside to the outside. A conductive line 431 in this embodiment can be regarded as consisting of a plurality of curved segments connected end to end. The aforementioned arrangement from the inside to the outside refers to the distribution from a position close to the center of the second electrode layer 40 to a position away from the center of the second electrode layer 40 along the radial direction of the liquid crystal lens. The direction close to the center of the second electrode layer 40 is the inside, and the direction away from the center of the second electrode layer 40 is the outside. In this embodiment, each curved segment is disconnected at the electrode lead group 4110 to avoid contact or mutual influence with the electrode lead group 4110. After each curved segment is disconnected at the electrode lead, two ends are formed, and the two ends are respectively on both sides of the electrode lead.

[0091] One end of the outermost curved segment 4311 is electrically connected to the second electrode lead 412, and the other opposite end is connected to the adjacent curved segment on the same side of the electrode lead group 4110; one end of the innermost curved segment 4312 is electrically connected to the first electrode lead 411, and the other opposite end is connected to the adjacent curved segment on the same side of the electrode lead group 4110; one end of the remaining curved segments is connected to an adjacent curved segment on the same side of the electrode lead group 4110, and the other opposite end is connected to another adjacent curved segment on the same side of the electrode lead group 4110.

[0092] like Figure 10As shown, among the multiple curved segments that make up the conductive line 431, two are particularly special. One is the outermost curved segment 4311 in the electrode unit 430, i.e., the curved segment farthest from the center of the second electrode layer 40 in the electrode unit 430. The other is the innermost curved segment 4312, i.e., the curved segment farthest from the center of the second electrode layer 40 in the electrode unit 430. One end of the outermost curved segment 4311 is electrically connected to the second electrode lead 412, and the other end is electrically connected to the next curved segment (the curved segment radially closer to the center of the second electrode layer 40). One end of the innermost curved segment 4312 is electrically connected to the first electrode lead 411, and the other end is connected to the previous curved segment (the curved segment radially farther from the center of the second electrode layer 40). Among all the curved segments that make up the conductive line 431, except for the aforementioned two curved segments, both ends of the remaining curved segments are connected to their adjacent curved segments. For ease of description, these curved segments are also referred to herein as intermediate curved segments 4313. One end of these intermediate curve segments 4313 is connected to the previous curve segment, and the other end is connected to the next curve segment. In this way, these curve segments are connected end to end to form a conductive line 431 that continuously extends from the position of the electrode unit 430 near the center of the second electrode layer 40 to the position of the edge of the second electrode unit 430 and fully fills the second electrode layer 40. On the other hand, they cleverly avoid the electrode lead group 4110, thereby achieving accurate distribution of electric potential while avoiding the influence of the electrode lead group 4110. In this embodiment, the ends of two adjacent curve segments can be connected by a connecting segment 4314. That is, one end of the connecting segment 4314 is connected to the previous curve segment, and the other end is connected to the next curve segment. The first electrode lead 411 and the second electrode lead 412 can be straight lines, and each connecting segment 4314 can also be a straight line parallel to the first electrode lead 411 or the second electrode lead 412.

[0093] like Figure 10 As shown in FIG. 1 , as one preferred embodiment, in this embodiment, the curved segment is an arc, and the spacing between adjacent conductive lines is the same. The above method can not only obtain an accurate parabolic potential distribution, but also reduce the production cost by using a simple structure. The effect of the Fresnel liquid crystal lens using this structure can be seen in FIG. Figure 18 and Figure 19 ,in Figure 18 and Figure 19 These are interference ripple diagrams of the liquid crystal lens in positive and negative lens working states when the single curve segment is a circular arc. It can be seen from the figures that the potential of the Fresnel liquid crystal lens with this structure presents a good parabolic distribution.

[0094] As another implementation in this embodiment, the spacing between at least some adjacent curved segments is unequal. This embodiment can also control the potential distribution of the electrode unit 430 by setting the spacing between the curved segments, thereby controlling the light modulation effect of the liquid crystal lens.

[0095] The spacing between adjacent curved segments satisfies the requirement that the potential distribution formed by the liquid crystal lens is spherical. When the spacing between adjacent curved segments meets the aforementioned requirements, the resulting wavefront distribution of the liquid crystal lens is spherical. Lenses with spherical wavefronts offer the most ideal imaging results, but conventional lenses require complex and meticulous external processing to achieve a lens with a nearly spherical wavefront distribution. In contrast, the present invention achieves a lens with a precisely spherical wavefront distribution simply by ensuring that the spacing between adjacent curved segments meets the aforementioned requirements. The spacing between adjacent curved segments satisfies the requirement that the potential distribution formed by the liquid crystal lens is conical. When the spacing between adjacent curved segments meets the aforementioned requirements, the resulting wavefront distribution of the liquid crystal lens is conical. As a preferred embodiment, in this embodiment, a high-impedance film is disposed between the second electrode layer 40 and the liquid crystal layer 30. Unlike current methods that primarily utilize high-impedance films to guide the potential distribution of liquid crystal lenses, this embodiment incorporates high-impedance films between adjacent conductive lines 431 primarily to reduce spatial variations in the electric field near the conductive lines 431. Since the spacing between adjacent conductive lines 431 is less than 100 μm, the potential distribution is mainly determined by the conductive lines 431 . Therefore, the effect of the change in the high-resistance film characteristics on the potential distribution in this embodiment can be ignored.

[0096] In addition, an insulating layer may be provided between the second electrode layer 40 and the liquid crystal layer 30, or an insulating layer may be provided between the second electrode layer 40 and the liquid crystal layer 30 and a high-resistance film may be provided between the insulating layer and the liquid crystal layer 30 to reduce the spatial variation of the electric field near the conductive line 431. Figure 13 As shown in the figure, since the voltage at the junction of two adjacent electrode units jumps from the first driving circuit to the second driving voltage, the voltage in this area suddenly changes, thereby generating a stronger electric field than other areas. This electric field affects the potential distribution within a certain range at the junction, thereby reducing the imaging quality of the liquid crystal lens. Figure 14 As shown, in this embodiment, the liquid crystal lens further includes a conductive member, the projection of the conductive member on the second electrode layer is located at the junction of adjacent electrode units, and the conductive member is used to receive a third driving voltage.

[0097] like Figure 15 As shown, Figure 15 To intercept Figure 14The schematic diagram of an enlarged arbitrary small section in the circular ring, in which a and b respectively represent the parts of the conductive lines of the two electrode units that are adjacent to the other electrode unit. Since each electrode unit is composed of conductive lines, the junction of adjacent electrode units includes the parts of the conductive lines of the two electrode units that are adjacent to the other electrode unit, and the area between the two adjacent parts, namely part a, part b and part c between part a and part b in the figure. The projection of the conductive element on the second electrode layer can be located between the two adjacent electrode units, or it can partially cover the parts of the conductive lines of the two electrode units that are adjacent to the other electrode unit. The conductive element can be located on the side of the second electrode layer facing the second substrate, or it can be located on the side of the second electrode layer facing away from the second substrate. In this embodiment, an insulating layer is also included between the conductive element and the second electrode layer. In this embodiment, the insulating layer is used to separate the conductive element and the second electrode layer to avoid mutual influence. As Figure 16 and Figure 17 As shown, by applying the third driving voltage V3 to the conductive element, the range affected by the strong electric field at the junction of two adjacent electrode units can be reduced, thereby improving the imaging quality of the liquid crystal lens.

[0098] Example 2

[0099] This embodiment provides a liquid crystal lens driving method, which is used to drive the liquid crystal lens described in Example 1. Assume that the voltage applied between the first electrical connection and the first electrode layer 20 is V1, and the voltage applied between the second electrical connection and the first electrode layer 20 is V2. Figure 11 As shown, the method includes the following steps:

[0100] S1: Obtaining the liquid crystal linear response voltage interval of the liquid crystal lens;

[0101] The linear operating range of the liquid crystal refers to the voltage range in which the phase retardation of the liquid crystal and the driving voltage are in a linear relationship.

[0102] S2: Obtain the minimum voltage V in the liquid crystal linear working range according to the liquid crystal linear response voltage range. min and the maximum voltage V max ;

[0103] S3: According to the minimum voltage V min and the maximum voltage V max Adjust the voltage difference between V1 and V2 to adjust the optical power of the liquid crystal lens, where V min ≤V1≤V max , and V min ≤V2≤V max .

[0104] In this step, the optical power of the liquid crystal lens can be adjusted by adjusting the value of V1-V2. When making specific adjustments, you can keep V1 unchanged and adjust the size of V2; you can also keep V1 unchanged and adjust the size of V2; you can also change the sizes of V1 and V2 at the same time. When keeping V1 unchanged and adjusting the size of V2, you can set V1=V min Or V1=V max , and adjust the size of V2; when keeping V2 unchanged and adjusting the size of V1, you can set V2 = V min Or V2 = V max In addition, this embodiment can also switch the positive lens state and the negative lens state of the liquid crystal lens by changing the size relationship between V1 and V2.

[0105] Example 3

[0106] In addition, combined Figure 12 The liquid crystal lens driving method of the aforementioned embodiment of the present invention can be implemented by the liquid crystal lens driving device of this embodiment. Figure 12 FIG2 shows a schematic diagram of the hardware structure of a liquid crystal lens driving device provided by an embodiment of the present invention. The liquid crystal lens driving device of this embodiment may include a processor 1 and a memory 2 storing computer program instructions. Specifically, the processor 1 may include a central processing unit (CPU) or an application-specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiment of the present invention.

[0107] Memory 2 may include a large-capacity memory for data or instructions. By way of example, and not limitation, memory 2 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 2 may include removable or non-removable (or fixed) media. Where appropriate, memory 2 may be internal or external to the data processing device. In a specific embodiment, memory 2 is a non-volatile solid-state memory. In a specific embodiment, memory 2 includes a read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these. Processor 1 implements any of the data addressing methods for driving a regional random liquid crystal lens in the above-described embodiments by reading and executing computer program instructions stored in memory 2.

[0108] In one example, the liquid crystal lens driving device of this embodiment may further include a communication interface 3 and a bus 410. Figure 10 As shown, the processor 1, memory 2, and communication interface 3 are connected and communicate with each other via bus 410. Communication interface 3 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiment of the present invention. Bus 410 includes hardware, software, or both, and couples various components to each other. By way of example and not limitation, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industrial Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industrial Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses or a combination of two or more of these. Where appropriate, bus 410 may include one or more buses. Although the embodiments of the present invention describe and illustrate specific buses, the present invention contemplates any suitable bus or interconnect.

[0109] Example 4

[0110] In addition, in conjunction with the liquid crystal lens driving method in the above embodiments, embodiments of the present invention may provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when executed by a processor, the computer program instructions implement any of the liquid crystal lens driving methods in the above embodiments.

[0111] Example 5

[0112] This embodiment provides a pair of glasses, comprising the liquid crystal lens described in Example 1. The glasses include a left lens and a right lens, each of which is provided with the liquid crystal lens described in Example 1. The glasses also include a control circuit, the control circuit comprising a first focusing circuit and a second focusing circuit. The first focusing circuit is electrically connected to the liquid crystal lens in the left lens and is used to adjust the optical power of the liquid crystal lens in the left lens. The second focusing circuit is electrically connected to the liquid crystal lens in the right lens and is used to adjust the optical power of the liquid crystal lens in the right lens.

[0113] Example 6

[0114] This embodiment provides an electronic product, comprising a control circuit and the liquid crystal lens described in any one of Embodiment 1, wherein the control circuit is electrically connected to the liquid crystal lens. The electronic product includes, but is not limited to, an imaging device, a display device, a mobile phone, a wearable device, and the like.

[0115] Example 7

[0116] This embodiment provides an AR device, including the liquid crystal lens described in Embodiment 1. Furthermore, the AR device includes a first lens assembly and a second lens assembly. The first lens assembly includes at least one liquid crystal lens described in Embodiment 1, and the second lens assembly includes at least one liquid crystal lens described in Embodiment 1. The AR device also includes a first focusing circuit and a second focusing circuit. The first focusing circuit is electrically connected to the liquid crystal lens in the first lens assembly and is used to adjust the optical power of the liquid crystal lens in the first lens assembly. The second focusing circuit is electrically connected to the liquid crystal lens in the second lens assembly and is used to adjust the optical power of the liquid crystal lens in the second lens assembly. In this embodiment, the first lens assembly corresponds to the user's left eye, and the second lens assembly corresponds to the user's right eye.

[0117] In AR devices, since the left and right eyes correspond to different screens, they also have two sets of lens assemblies corresponding to the left and right eyes, respectively. Since the interpupillary distance of different users' eyes varies, if the focal length of the lens assembly is constant, it will inevitably lead to some users experiencing different feelings when wearing AR glasses. Because different consumers have different facial features, the AR glasses in this embodiment can use the liquid crystal lens in Example 1 to achieve the function of focal length adjustment. Adjusting both the interpupillary distance and the focal length to the appropriate position will allow the image to fall accurately on the retina, obtaining a clear image, thereby providing users with a better user experience.

[0118] Example 8

[0119] This embodiment provides a VR device, including the liquid crystal lens described in Embodiment 1. The VR device includes a third lens assembly and a fourth lens assembly. The third lens assembly includes at least one liquid crystal lens described in Embodiment 1, and the fourth lens assembly includes at least one liquid crystal lens described in Embodiment 1. The VR device also includes a third focusing circuit and a fourth focusing circuit. The third focusing circuit is electrically connected to the liquid crystal lens in the third lens assembly and is used to adjust the optical power of the liquid crystal lens in the third lens assembly; the fourth focusing circuit is electrically connected to the liquid crystal lens in the fourth lens assembly and is used to adjust the optical power of the liquid crystal lens in the fourth lens assembly. In this embodiment, the third lens assembly corresponds to the user's left eye, and the fourth lens assembly corresponds to the user's right eye.

[0120] In VR devices, since the left and right eyes correspond to different screens, they also have two sets of lens assemblies, one for the left eye and the other for the right eye. Since the interpupillary distance between different users varies, if the focal length of the lens assembly is constant, some users will inevitably experience differences when wearing VR glasses. Because different consumers have different facial features, the VR glasses in this embodiment can utilize the liquid crystal lens in Example 1 to achieve focal length adjustment. Adjusting both the interpupillary distance and focal length to the appropriate position will ensure that the image falls accurately on the retina, resulting in a clear image and a better user experience.

[0121] The above is a detailed introduction to the liquid crystal lens driving method, device, equipment, and storage medium provided by the embodiments of the present invention.

[0122] It should be understood that the present invention is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of clarity, detailed descriptions of known methods are omitted. In the above embodiments, several specific steps are described and illustrated as examples. However, the method and process of the present invention are not limited to the specific steps described and illustrated. Those skilled in the art may make various changes, modifications, and additions, or change the order of the steps after understanding the spirit of the present invention. The functional blocks shown in the above block diagrams can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they may be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of the present invention are programs or code segments used to perform the desired tasks. Programs or code segments may be stored in a machine-readable medium or transmitted over a transmission medium or communication link via a data signal carried in a carrier wave. "Machine-readable medium" may include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memory, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, and the like. The code segments can be downloaded via a computer network such as the Internet or an intranet. It should also be noted that the exemplary embodiments described herein describe methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the steps described above. In other words, the steps may be performed in the order described in the embodiments, or in a different order, or several steps may be performed simultaneously.

[0123] The above description is only a specific embodiment of the present invention. Those skilled in the art will clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention.

Claims

1. A liquid crystal lens, characterized in that: The device comprises a liquid crystal layer, a first electrode layer, a second electrode layer, a first transparent substrate and a second transparent substrate, wherein the first electrode layer and the second electrode layer are respectively located on opposite sides of the liquid crystal layer, the first transparent substrate is located on a side of the first electrode layer facing away from the liquid crystal layer, and the second transparent substrate is located on a side of the second electrode layer facing away from the liquid crystal layer; The second electrode layer includes a plurality of electrode units, the plurality of electrode units are sequentially arranged from a position close to the center of the second electrode layer to a position away from the center of the second electrode layer, the conductive line extends from a first position of the electrode unit to a second position of the electrode unit, the distance between the second position and the center of the second electrode layer is greater than the distance between the first position and the center of the second electrode layer, the spacing between adjacent conductive lines is less than or equal to 100 μm, one end of the conductive line is driven by a first voltage, and the other end thereof is driven by a second driving voltage; The electrode unit has one conductive wire, which includes a plurality of intermediate connecting segments and a plurality of concentric rings, and the adjacent concentric rings are connected via the intermediate connecting segments.

2. The liquid crystal lens according to claim 1, wherein The plurality of electrode units are configured to enable the liquid crystal in the liquid crystal layer to form a phase distribution equivalent to that of a Fresnel lens under the action of the first driving voltage and the second driving voltage.

3. The liquid crystal lens according to claim 1, wherein It also includes an electrode lead group, which includes a first electrode lead and a second electrode lead. The conductive line of the electrode unit includes a plurality of curved segments arranged from the inside to the outside, each curved segment is disconnected at the electrode lead group, wherein one end of the curved segment located on the outermost periphery is electrically connected to the second electrode lead, and the other opposite end is connected to the adjacent curved segment on the same side of the electrode lead group, wherein one end of the innermost curved segment is electrically connected to the first electrode lead, and the other opposite end is connected to the curved segment of the adjacent segment on the same side of the electrode lead group, and one end of the remaining curved segments is connected to an adjacent curved segment on the same side of the electrode lead group, and the other opposite end is connected to another adjacent curved segment on the same side of the electrode lead group.

4. The liquid crystal lens according to claim 3, wherein The curved line segments are circular arcs, and the distances between adjacent conductive lines are the same.

5. The liquid crystal lens according to any one of claims 1 to 4, characterized in that The liquid crystal lens further includes a conductive element, a projection of the conductive element on the second electrode layer is located at a junction of adjacent electrode units, and the conductive element is used to receive a third driving voltage.

6. Glasses, characterized in that A liquid crystal lens comprising the liquid crystal lens according to any one of claims 1 to 5.

7. Electronic products, characterized in that, The liquid crystal lens comprises a control circuit and the liquid crystal lens according to any one of claims 1 to 4, wherein the control circuit is electrically connected to the liquid crystal lens.

8. A liquid crystal lens driving method, characterized in that: For driving the liquid crystal lens according to any one of claims 1 to 4, assuming that the first driving voltage is V1 and the second driving voltage is V2, the method comprises the following steps: S1: Obtaining the liquid crystal linear response voltage interval of the liquid crystal lens; S2: Obtain the minimum voltage V in the liquid crystal linear working range according to the liquid crystal linear response voltage range. min and the maximum voltage V max ; S3: According to the minimum voltage V min and the maximum voltage V max Adjust the voltage difference between V1 and V2 to adjust the optical power of the liquid crystal lens and / or switch the state of the liquid crystal lens between a positive lens and a negative lens, where V min ≤V1≤V max , and V min ≤V2≤V max .

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