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

Abstract

The application belongs to the technical field of optics, and particularly relates to a liquid crystal lens, a driving method of the liquid crystal lens and an electronic product. The liquid crystal lens comprises a first substrate, a first pattern electrode, a high impedance film, a first orientation layer, a liquid crystal layer, a second orientation layer, a second pattern electrode and a second substrate which are sequentially stacked; the first pattern electrode comprises two first rectangular electrodes and a plurality of second rectangular electrodes, the two first rectangular electrodes and the plurality of second rectangular electrodes have the same length, the plurality of second rectangular electrodes are rotationally arranged along the same set center, and the two first rectangular electrodes are respectively arranged in parallel on two sides of a reference plane, and the two first rectangular electrodes and each second rectangular electrode are loaded with a first driving voltage V1 at the end on one side of the reference plane and a second driving voltage V2 at the end on the other side. The application can reduce diffraction and effectively avoid voltage jump.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of optics, and particularly relates to a liquid crystal lens, a driving method of the liquid crystal lens and an electronic product. BACKGROUND

[0002] The liquid crystal lens can change optical power through electric field regulation, and has the advantages of fast response speed, small volume and easy integration. Based on these excellent properties, the liquid crystal lens has been widely used in projection display, light focusing and energy concentrating, illumination optics and small imaging systems. The structure of the liquid crystal lens is generally divided into two types. The first type is proposed by Sato in the document Liquid-crystal lens-cells with variable focal length, which changes the shape of the liquid crystal layer to have a lens effect, and then changes the refractive index of the liquid crystal layer through voltage modulation to change the optical power of the lens, as shown in formula (1). The second type is controlled by electrodes to realize phase modulation. Kotava proposed a mode control liquid crystal lens structure in 2015, in which the upper and lower electrode surfaces are driven by alternating current to generate a near parabolic voltage, as shown in formula (2). Although this lens has good imaging effect, the finished lens is relatively unstable due to the need of high resistance film material for the electrode surface. Galstian proposed a serpentine ITO electrode to replace the high resistance film in the document Electrically tunable liquid crystal lens with a serpentine electrode design, which realized mode control, as shown in formula (3). Algorri also proposed a similar structure in the document A high birefringence liquid crystal for lenses with large aperture, in which a single electrode realizes the voltage distribution of the lens, and concentric circular rings are designed to distribute the voltage into a circle, as shown in formula (4). However, the ITO electrode in the lens area of the two structures will produce obvious diffraction effect, and the voltage distribution in the area not covered by the electrode will jump, which makes the imaging effect of the lens not ideal. Figure 1 Figure 2 Figure 3 Figure 4 SUMMARY

[0003] Therefore, the application provides a liquid crystal lens, a driving method of the liquid crystal lens and an electronic product, which are used to solve the technical problems that the ITO electrode in the existing liquid crystal lens will produce obvious diffraction effect, and the voltage distribution in the area not covered by the electrode will jump.

[0004] ​​​​The first aspect of the present application provides a liquid crystal lens, comprising a first substrate, a first pattern electrode, a high impedance film, a first alignment layer, a liquid crystal layer, a second alignment layer, a second pattern electrode and a second substrate which are sequentially stacked.

[0005] The first pattern electrode comprises two first rectangular electrodes and a plurality of second rectangular electrodes, the lengths of the two first rectangular electrodes and the plurality of second rectangular electrodes are the same, the plurality of second rectangular electrodes are arranged in rotation along the same set center, and the two first rectangular electrodes are respectively arranged in parallel on two sides of a reference plane, the two first rectangular electrodes and each second rectangular electrode are loaded with a first driving voltage V1 at the end on one side of the reference plane and a second driving voltage V2 at the end on the other side, the reference plane is a plane passing through the set center and perpendicular to the plane where the first pattern electrode is located, and wherein V represents the amplitude of the alternating voltage, f represents the voltage frequency, and represents the voltage phase.

[0006] Preferably, a spacer is further arranged between the first alignment layer and the second alignment layer.

[0007] Preferably, the first rectangular electrode and the second rectangular electrode are transparent electrodes.

[0008] Preferably, the first substrate and the second substrate are transparent substrates.

[0009] Preferably, the second pattern electrode is a planar electrode.

[0010] Preferably, the second pattern electrode comprises a plurality of electrode units with the same center position, the plurality of electrode units are sequentially arranged from the position of the center of the second pattern electrode to the edge position of the second pattern electrode, wherein the electrode unit at the center is circular, and the remaining electrode units are annular, and the line connecting the center position of the second pattern electrode and the set center is perpendicular to the first pattern electrode.

[0011] Preferably, the electrode unit is divided into two sub-units by the reference plane.

[0012] The second aspect of the present application provides a driving method of a liquid crystal lens, which is used for driving the liquid crystal lens of the first aspect, and the method comprises the following steps:

[0013] S1: obtaining a liquid crystal linear working interval of the liquid crystal lens;

[0014] S2: obtaining a minimum voltage Vmin and a maximum voltage Vmax in the liquid crystal linear working interval according to the liquid crystal linear working interval;

[0015] S3: determining a voltage phase according to the minimum voltage Vmin and the maximum voltage Vmax a target adjustment range of the voltage phase;

[0016] S4: loading a first driving voltage V1 on the end part of the first rectangular electrode and the second rectangular electrode on one side of the reference plane and loading a second driving voltage V2 on the end part on the other side according to the adjustment range, and the voltage phase of the loaded driving voltage is within the target adjustment range.

[0017] In a third aspect, the present application provides a driving method of a liquid crystal lens, used for driving the liquid crystal lens of the first aspect, and the method comprises:

[0018] S01: obtaining a liquid crystal linear working interval of the liquid crystal lens;

[0019] S02: obtaining a minimum voltage Vmin and a maximum voltage Vmax within the liquid crystal linear working interval according to the liquid crystal linear working interval;

[0020] S03: determining a voltage phase a target adjustment range of the voltage phase;

[0021] S04: loading a first driving voltage V1 on the end part of the first rectangular electrode and the second rectangular electrode on one side of the reference plane and loading a second driving voltage V2 on the end part on the other side according to the adjustment range, and the voltage phase of the loaded driving voltage is within the target adjustment range.

[0022] S05: loading driving voltages to each electrode unit according to the position of each electrode unit in the second pattern electrode, wherein the driving voltage of the i-th electrode unit is

[0023] In a fourth aspect, the present application provides an electronic product comprising a control circuit and the liquid crystal lens of any one of claims 1 to 7, wherein the control circuit is electrically connected with the liquid crystal lens

[0024] Beneficial effects: the liquid crystal lens, the driving method of the liquid crystal lens and the electronic product of the present application adopt the structure of rotating arrangement of multiple rectangular electrodes around a set center, and each rectangular electrode forms a parabolic distribution by applying driving voltages to the two ends of the rectangular electrode, so that a rotationally symmetric parabolic potential distribution can be formed under the joint action of all the rectangular electrodes. And the potential distribution in the lens function area is made more smooth by the high impedance film. Since the liquid crystal lens of the present application does not produce obvious diffraction and jump, its optical performance is more excellent. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced as follows, and other drawings can be obtained by those of ordinary skill in the art without any creative effort on the premise of not paying any creative effort, and these are within the protection scope of the present application.

[0026] Figure 1 A structural schematic diagram of a liquid crystal lens proposed by Sato in the prior art;

[0027] Figure 2 A structural schematic diagram of a mode control liquid crystal lens proposed by Kotava in the prior art;

[0028] Figure 3 A structural schematic diagram of a liquid crystal lens in which a high-resistance film is replaced by a serpentine ITO electrode to realize mode control in the prior art;

[0029] Figure 4 A structural schematic diagram of a liquid crystal lens in which a single electrode is used to realize voltage distribution of the lens, and concentric circular rings are designed to make the voltage distribution circular in the prior art;

[0030] Figure 5 A sectional view of the liquid crystal lens adopted by the present application;

[0031] Figure 6 A structural schematic diagram of a first pattern electrode in the present application;

[0032] Figure 7 A structural schematic diagram of a single rectangular electrode in the present application;

[0033] Figure 8 A structural schematic diagram of a second pattern electrode in the present application;

[0034] Figure 9 A flow schematic diagram of a liquid crystal lens driving method in the present application;

[0035] Figure 10 A schematic diagram of a linear working interval of a liquid crystal lens;

[0036] Figure 11 A fitting curve diagram of potential distribution of a liquid crystal layer under different driving voltages;

[0037] Figure 12 A voltage distribution diagram in a liquid crystal layer of the liquid crystal lens of the present application;

[0038] Figure 13 An interference fringe diagram of the liquid crystal lens of the present application;

[0039] Figure 14 A flow schematic diagram of another liquid crystal lens driving method in the present application;

[0040] Figure 15 This is a schematic diagram of the effective potential of the first patterned electrode and the effective voltage of the liquid crystal layer of the present invention;

[0041] Figure 16 This is a voltage distribution diagram of the Fresnel liquid crystal lens of the present invention.

[0042] The components and their numbers shown in the picture:

[0043] First substrate 1, first patterned electrode 2, first rectangular electrode 21, second rectangular electrode 22, high impedance film 3, first alignment layer 4, liquid crystal layer 5, spacer 6, second alignment layer 7, second patterned electrode 8, second substrate 9. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of 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 document, 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 terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, the element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Where there is no conflict, embodiments of the present invention and the various features thereof can be combined with each other, all of which are within the scope of protection of the present invention.

[0045] Example 1

[0046] like Figure 5 As shown, this embodiment provides a liquid crystal lens, which includes a first substrate 1, a first patterned electrode 2, a high-resistivity film 3, a first alignment layer 4, a liquid crystal layer 5, a second alignment layer 7, a second patterned electrode 8, and a second substrate 9 stacked sequentially.

[0047] like Figure 6 As shown, the first patterned electrode 2 includes two first rectangular electrodes 21 and several second rectangular electrodes 22. The two first rectangular electrodes 21 and several second rectangular electrodes 22 have the same length. The several second rectangular electrodes 22 are arranged in a rotating pattern around the same set center. The two first rectangular electrodes 21 are respectively arranged parallel to each other on both sides of a reference plane. A first driving voltage V1 is applied to the ends of the two first rectangular electrodes 21 and each second rectangular electrode 22 on one side of the reference plane, and a second driving voltage V2 is applied to the ends on the other side. The reference plane is a plane that passes through the set center and is perpendicular to the plane where the first patterned electrode 2 is located. Where V represents the AC voltage amplitude, and f represents the voltage frequency. Indicates the voltage phase.

[0048] In each of the second rectangular electrodes 22, any one of the second rectangular electrodes 22 can be obtained by rotating another second rectangular electrode 22 around a predetermined center by a certain angle. The angles between the second rectangular electrodes 22 can be equal or unequal, which is not limited here. These second rectangular electrodes 22 intersect at the same point, which is the aforementioned predetermined center. Both the first rectangular electrode 21 and the second rectangular electrode 22 have two opposing endpoints. In this embodiment, the first pattern electrode 2 is divided into two parts with a reference plane as the boundary. For ease of description, one part is called the first part, and the other part is called the second part. The endpoints of the first rectangular electrode 21 and the second rectangular electrode 22 located in the first part are all loaded with a first driving voltage, and the endpoints located in the second part are all loaded with a second driving voltage. The first driving voltage and the second driving voltage have the same amplitude, the same frequency, and a phase difference of the same value. The driving voltage. The second patterned electrode is a planar electrode, which can serve as a ground plane.

[0049] Each rectangular electrode of the first patterned electrode 2 can generate a near-parabolic potential distribution under the drive of a sinusoidal alternating current. The first driving voltage V1 and the second driving voltage V2 can be expressed as follows:

[0050]

[0051] The effective value of electric potential can be expressed as:

[0052] Where T is the integration time.

[0053] Normalize the coordinates of a single electrode, such as Figure 7 As shown, Figure 7 In the diagram, 0 represents the preset center position, and -1 and +1 represent the positions of the two ends of the electrode, respectively. The effective value of the potential distribution on a single electrode is V. upmay be expressed as:

[0054]

[0055] Since a single electrode can generate a parabolic potential distribution under the driving of the first driving voltage and the second driving voltage, the plurality of second rectangular electrodes 22 are arranged in a rotating distribution along the same center point, and thus have a parabolic potential distribution at each angle. These electrodes, in combination with the high-impedance film 3, can smoothly distribute the potential in the lens area to obtain a rotationally symmetric parabolic potential distribution. When the driving voltage is in the linear working range of the liquid crystal, the rotationally symmetric parabolic potential distribution causes the refractive index of the liquid crystal layer 5 to be parabolic. Therefore, the electrode structure in this embodiment can not only obtain a liquid crystal lens with a parabolic refractive index of the liquid crystal layer 5, but also does not produce significant diffraction effects, so the optical effect of the lens is more excellent.

[0056] In order to better support the liquid crystal layer 5, a spacer 6 is further arranged between the first alignment layer 4 and the second alignment layer 7 in this embodiment. The spacer 6 can be arranged at the edge of the liquid crystal layer 5 to keep the shape of the liquid crystal layer 5 stable.

[0057] In this embodiment, the first rectangular electrode 21 and the second rectangular electrode 22 are arranged as transparent electrodes. After using transparent electrodes, light can pass through the electrodes without being blocked, thereby improving the optical effect of the liquid crystal lens. The materials of the transparent electrodes include, but are not limited to, ITO electrode materials, FTO electrode materials, AZO electrode materials, IGZO electrode materials, IZO electrode materials, etc.

[0058] In this embodiment, the first substrate 1 and the second substrate 9 can be made of transparent materials with certain strength and rigidity, such as glass substrates, plastic substrates, etc. The first substrate 1 and the second substrate 9 can support the liquid crystal lens. The first substrate 1 can be used as a carrier for the first pattern electrode 2, and the first pattern electrode 2 can be plated on the first substrate 1. The second substrate 9 also has a supporting effect and can be used as a carrier for the second pattern electrode 8, and the second pattern electrode 8 can be plated on the second substrate 9.

[0059] The use of transparent substrates for the first substrate 1 and the second substrate 9 in this embodiment can improve the light transmittance and thus improve the optical performance of the liquid crystal lens.

[0060] Embodiment 2

[0061] The embodiment further improves the liquid crystal lens as described above, and a Fresnel liquid crystal lens can also be obtained. For this kind of liquid crystal lens, the second pattern electrode 8 comprises a plurality of electrode units with the same center position, and the plurality of electrode units are arranged in sequence from the center position of the second pattern electrode 8 to the edge position of the second pattern electrode 8. The electrode unit at the center is circular, and the other electrode units are annular. The center position of the second pattern electrode 8 and the line connecting the set center are perpendicular to the first pattern electrode 2.

[0062] The Fresnel lens is obtained by keeping the surface curvature unchanged in the design of the optical lens, but reducing the thickness of the surface in the process of machining. The lens designed in this way can still converge light and focus the light incident on the surface to the focal point.

[0063] In the actual machining and application of the lens, the spherical lens can be regarded as a plurality of non-continuous parts, and the excess part between the parts is removed, but the original curvature of the surface is kept unchanged in the process of machining, which does not affect the deflection of light. The functions of the plurality of non-continuous parts are realized by the center circle and a series of concentric rings on the Fresnel lens in the embodiment. The functions of the concentric rings of the Fresnel lens are realized by the regular deflection of the liquid crystal layer 5 under the action of the electric field in the embodiment, so that the optical effect equivalent to the Fresnel lens is realized by the liquid crystal lens.

[0064] In the embodiment, the radius of each electrode unit is the same as the radius of the corresponding Fresnel ring. The radius of the i-th electrode unit from the center of the second pattern electrode to the edge is r i , where r0 is the radius of the electrode unit at the center (the first electrode unit), and , where i is a positive integer greater than or equal to 1, and the larger the value of i is, the closer the ring is to the edge position of the lens.

[0065] The embodiment uses the driving voltage loaded on the second pattern electrode to reduce the voltage finally acting on the corresponding region of the liquid crystal layer, so that the voltage distribution of each region in the liquid crystal layer meets the voltage distribution of the Fresnel liquid crystal lens.

[0066] As shown in Figure 8 , in order to facilitate the loading of the driving voltage, the embodiment divides the electrode unit corresponding to each Fresnel ring into two sub-units by the reference plane. Assuming that the second pattern electrode has n electrode units corresponding to the Fresnel rings, there are 2n sub-units after division. For example Figure 8There are three Fresnel zones in the middle, numbered from the center to the edge as the first Fresnel zone, the second Fresnel zone, and the third Fresnel zone. The first Fresnel zone is divided into two sub-units, V3 and V6; the second Fresnel zone is divided into two sub-units, V4 and V7; and the third Fresnel zone is divided into two sub-units, V5 and V8.

[0067] Example 3

[0068] like Figure 9 As shown, this embodiment provides a driving method for a liquid crystal lens, which is used to drive the liquid crystal lens described in Embodiment 1. The method includes:

[0069] S1: Obtain the linear operating range of the liquid crystal lens;

[0070] The linear operating range of a liquid crystal refers to the voltage range in which the phase delay of the liquid crystal is linearly related to the driving voltage. Within this range, the voltage distribution determines the type of liquid crystal lens.

[0071] For example, when the liquid crystal lens uses liquid crystal material of type (HTW148700-100), the linear response region of this liquid crystal is 1.6V. rms Up to 2.5V rms Between, see Figure 10 As shown.

[0072] S2: Obtain the minimum voltage Vmin and maximum voltage Vmax within the linear working range of the liquid crystal based on the linear working range of the liquid crystal;

[0073] S3: Determine the voltage phase based on the minimum voltage Vmin and the maximum voltage Vmax. The target adjustment range; for example, for Figure 7 The potential of a single electrode reaches its maximum at the edge x = ±1, let the maximum value be 2.5V. rms ,Right now According to the aforementioned formula, when the driving voltage V amplitude is 3.54V, then for the electrode center x = 0, we have:

[0074] According to the aforementioned formula, to make the magnitude of the center potential change within 1.6V... rms Up to 2.5V rms Voltage phase The range of variation should be between 100.42° and 0°. Figure 11 (a) to (h) represent voltage phase. The different potential distributions corresponding to changes within the target adjustment range (100.42° to 0°). Figure 11 The fitting coefficients R of all fitted parabolas 2At least above 0.997, this indicates that the potential distribution on the electrode line is very close to a parabolic distribution.

[0075] S4: According to the adjustment range, a first driving voltage V1 is applied to the end of the first rectangular electrode and the second rectangular electrode located on one side of the reference plane, and a second driving voltage V2 is applied to the end on the other side, wherein the voltage phase of the applied driving voltage is within the adjustment range.

[0076] According to the aforementioned driving method The liquid crystal layer voltage is obtained as follows Figure 12 As shown. Actual device corresponding... Figure 11 The interference fringes of the applied voltage are as follows Figure 13 As shown.

[0077] Example 4

[0078] like Figure 14 As shown, this embodiment provides a driving method for a liquid crystal lens, which is used to drive the liquid crystal lens described in Embodiment 2. The method includes:

[0079] S01: Obtain the linear operating range of the liquid crystal lens;

[0080] S02: Obtain the minimum voltage Vmin and maximum voltage Vmax within the linear working range of the liquid crystal based on the linear working range of the liquid crystal;

[0081] S03: Determine the voltage phase based on the minimum voltage Vmin and the maximum voltage Vmax. The target adjustment range;

[0082] S04: According to the adjustment range, a first driving voltage V1 is applied to the end of the first rectangular electrode and the second rectangular electrode located on one side of the reference plane, and a second driving voltage V2 is applied to the end on the other side, wherein the voltage phase of the applied driving voltage is within the adjustment range.

[0083] In this embodiment, the voltage driving method for the first patterned electrode is the same as in Embodiment 3, both used to generate a symmetrical potential distribution of a parabolic rotating surface, which will not be described again here.

[0084] S05: Apply driving voltage to each electrode unit according to the position of each electrode unit in the second pattern electrode, wherein the driving voltage of the i-th electrode unit is... like Figure 15 As shown, this step utilizes the second patterned electrode to reduce the effective voltage of the liquid crystal layer.

[0085] Let the driving voltage of the i-th electrode unit from the center to the edge of the second pattern electrode be... make The effective voltage of the liquid crystal layer in the region corresponding to the i-th electrode unit at this time is represented as:

[0086]

[0087] The potential of the upper substrate in the region corresponding to the i-th electrode unit is reduced by C i The effective voltage of the liquid crystal layer in the region corresponding to the i-th electrode unit should satisfy the following theoretical value:

[0088]

[0089] According to the above two formulas, the potential of the upper substrate in the region corresponding to the i-th electrode unit is reduced by C i The function can be defined as:

[0090]

[0091] According to the potential reduction value C i The potential V i and the phase of the i-th electrode unit in the second pattern electrode can be approximately solved. up i The voltage distribution of the liquid crystal layer can be obtained by solving the voltage of all regions, as shown in the following formula: Figure 16

[0092] When each electrode unit is divided into two sub-units, the driving voltage loaded by the two sub-units is equal to the driving voltage of the divided electrode unit.

[0093] V up represents the voltage of the first pattern electrode, wherein the potential reduction value C i is related to the characteristics of the Fresnel liquid crystal lens, and can be determined by the following method:

[0094] Suppose that the second pattern electrode has n electrode units (corresponding to n Fresnel zones), and the potential reduction value of the first electrode unit (the electrode unit at the center position) is C1, then the potential reduction value C i of the i-th electrode unit is C1+(i-1)[V(±1)-V(0)] / n, wherein i is a positive integer greater than or equal to 2.

[0095] V up (±1) represents the voltage at the edge of a single electrode in the first pattern electrode, and V up (0) represents the voltage at the center of a single electrode in the first pattern electrode.

[0096] Example 5

[0097] The present embodiment provides an electronic product comprising a control circuit and the liquid crystal lens described in embodiment 1 or embodiment 2, the control circuit being electrically connected with 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, etc.

[0098] It should be noted that the present application is not limited to the specific configurations and processes described above and shown in the drawings. For the sake of brevity, detailed descriptions of well-known methods are omitted. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and shown, and one of ordinary skill in the art can make various changes, modifications and additions, or change the order of the steps, after understanding the spirit of the present application. The functional blocks shown in the above described structural block diagrams can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a functional card, etc. When implemented in software, the elements of the present application are program or code segments used to perform the required tasks. The program or code segments can be stored in a machine readable medium or transmitted through a data signal carried in a carrier wave over a transmission medium or communication link. The "machine readable medium" can include any medium capable of storing or transmitting information. Examples of machine readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segments can be downloaded via a computer network such as the Internet, an intranet, etc. It should also be noted that the exemplary embodiments mentioned in the present application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiments, or in an order different from the embodiments, or several steps can be performed simultaneously.

[0099] The above description is merely specific embodiments of the present application, and those skilled in the art can clearly understand that, for the sake of brevity and simplicity, the specific working processes of the above described systems, modules and units can refer to the corresponding processes in the foregoing method embodiments, which will not be described here. It should be understood that the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application.

Claims

1. A liquid crystal lens, characterized in that, It includes a first substrate, a first patterned electrode, a high-resistivity film, a first alignment layer, a liquid crystal layer, a second alignment layer, a second patterned electrode, and a second substrate, which are stacked sequentially. The first patterned electrode includes two first rectangular electrodes and several second rectangular electrodes. The two first rectangular electrodes and several second rectangular electrodes have the same length. The several second rectangular electrodes are arranged in a rotating manner around the same set center. The two first rectangular electrodes are respectively arranged parallel to each other on both sides of the reference plane. The ends of the two first rectangular electrodes and each second rectangular electrode on one side of the reference plane are loaded with a first driving voltage V1, and the ends on the other side are loaded with a second driving voltage V2. The reference plane is a plane that passes through the set center and is perpendicular to the plane where the first patterned electrode is located. The first driving voltage and the second driving voltage are AC voltages with the same voltage amplitude, the same voltage frequency, and different voltage phases.

2. The liquid crystal lens according to claim 1, characterized in that, The first driving voltage V1 and the second driving voltage V2 satisfy: Where V represents the AC voltage amplitude, and f represents the voltage frequency. Indicates the voltage phase.

3. The liquid crystal lens according to claim 1, characterized in that, The first rectangular electrode and the second rectangular electrode are transparent electrodes.

4. The liquid crystal lens according to claim 1, characterized in that, The first substrate and the second substrate are transparent substrates.

5. The liquid crystal lens according to any one of claims 1 to 4, characterized in that, The second patterned electrode is a planar electrode.

6. The liquid crystal lens according to any one of claims 1 to 4, characterized in that, The second pattern electrode includes several electrode units with the same center position. The several electrode units are arranged sequentially from the center position of the second pattern electrode toward the edge position of the second pattern electrode. The electrode unit at the center is circular, and the remaining electrode units are in the shape of a ring. The line connecting the center position of the second pattern electrode and the set center is perpendicular to the first pattern electrode.

7. The liquid crystal lens according to claim 6, characterized in that, The electrode unit is divided into two sub-units by the reference plane.

8. A method for driving a liquid crystal lens, characterized in that, The method for driving the liquid crystal lens according to any one of claims 1 to 5 includes: S1: Obtain the linear operating range of the liquid crystal lens; S2: Obtain the minimum voltage Vmin and maximum voltage Vmax within the linear working range of the liquid crystal based on the linear working range of the liquid crystal; S3: Determine the voltage phase based on the minimum voltage Vmin and the maximum voltage Vmax. The target adjustment range; S4: According to the adjustment range, a first driving voltage V1 is applied to the end of the first rectangular electrode and the second rectangular electrode located on one side of the reference plane, and a second driving voltage V2 is applied to the end on the other side, wherein the voltage phase of the applied driving voltage is within the target adjustment range.

9. A method for driving a liquid crystal lens, characterized in that, The method for driving the liquid crystal lens of claim 6 or 7 includes: S01: Obtain the linear operating range of the liquid crystal lens; S02: Obtain the minimum voltage Vmin and maximum voltage Vmax within the linear working range of the liquid crystal based on the linear working range of the liquid crystal; S03: Determine the voltage phase based on the minimum voltage Vmin and the maximum voltage Vmax. The target adjustment range; S04: According to the adjustment range, a first driving voltage V1 is applied to the end of the first rectangular electrode and the second rectangular electrode located on one side of the reference plane, and a second driving voltage V2 is applied to the end on the other side, wherein the voltage phase of the applied driving voltage is within the target adjustment range. S05: Apply driving voltage to each electrode unit according to its position in the second patterned electrode. Assuming the second patterned electrode has n electrode units, then the driving voltage of the i-th electrode unit... Where 1≤i≤n.

10. An electronic product, characterized in that, The device includes a control circuit and a liquid crystal lens according to any one of claims 1 to 7, wherein the control circuit is electrically connected to the liquid crystal lens and / or drives the liquid crystal lens using the method of claim 8 or 9.

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