Liquid crystal lens and method for controlling the same

Abstract

The application discloses a liquid crystal lens and a control method thereof, wherein the liquid crystal lens comprises a first substrate, a first electrode group arranged on the first substrate, the first electrode group comprising M electrode areas, each electrode area comprising N first electrodes, and first electrodes in the same order in each electrode area being connected to a same first driving voltage source; a second substrate arranged opposite to the first substrate; a common surface electrode and a lead group corresponding to positions of the electrode areas being arranged on the second substrate, each lead group comprising N+1 conductive electrodes, high-resistance leads being arranged between adjacent conductive electrodes, and the conductive electrodes at two ends of the lead group being electrically connected to a second driving voltage source and the common surface electrode respectively; and a liquid crystal layer arranged between the first substrate and the second substrate, the liquid crystal layer being filled with liquid crystal molecules. The application can compensate for the imaging effect of uneven areas of the liquid crystal lens and reduce the setting of the driving voltage source.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal lenses, and in particular to a liquid crystal lens and its control method. Background Technology

[0002] Lenses are fundamental optical components, ubiquitous in optical instruments and equipment. With the development of optical technology, the requirements for lenses are becoming increasingly stringent. Firstly, the focal length of lenses must be continuously adjustable; secondly, large focal length lenses are required.

[0003] A liquid crystal lens is a technology that utilizes the unique physical and optical properties of liquid crystal materials. Unlike traditional glass lenses, liquid crystal lenses can focus or diffuse incident light based on an applied electric field. In particular, the focal length of a liquid crystal lens can be adjusted by changing the supply voltage. Because liquid crystal lenses do not require mechanical action to adjust the focal length, they are more suitable for use in many image acquisition technologies than traditional glass lenses.

[0004] Existing large-aperture liquid crystal lenses employ a zoned design, where theoretically, applying the same voltage to electrodes of the same order in each zone achieves the effect of a Fresnel lens. Currently, liquid crystal lens designs connect electrodes of the same order in each zone via adapter cables and drive them together. This approach reduces the number of signal channels and simplifies the driving process. However, during actual manufacturing, process variations can lead to uneven imaging in certain areas, requiring independent control and adjustment of the electrode voltages in these uneven regions. Current technologies typically achieve independent control by connecting each electrode to a separate driving voltage source. This allows for individual voltage adjustment to compensate for uneven imaging, but an excessive number of driver chips and other hardware circuits can reduce yield. Summary of the Invention

[0005] The applicant's research revealed that, in most cases during the manufacturing process of liquid crystal lenses, the effects of process deviations on electrodes in the same area are similar or nearly identical. Therefore, potential errors occur in the electrodes within the same area, and these errors exhibit a certain regularity. This regularity can be utilized to compensate for the unevenness of the electrodes in the same area, effectively solving the problem of uneven performance across different regions of the liquid crystal lens.

[0006] In view of the aforementioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a liquid crystal lens and a control method thereof, which aims to reduce the setting of driving voltage source while compensating for the imaging effect of uneven areas of the liquid crystal lens.

[0007] To achieve the above objectives, a first aspect of the present invention discloses a liquid crystal lens, the liquid crystal lens comprising:

[0008] A first substrate; a first electrode group is disposed on the first substrate, the first electrode group includes M electrode regions, each electrode region includes N first electrodes, and the first electrodes in the same order in each electrode region are connected to the same first driving voltage source.

[0009] A second substrate is disposed opposite to the first substrate; a common surface electrode and lead groups corresponding to the positions of each electrode region are disposed on the second substrate, each lead group includes N+1 conductive electrodes, and high-resistance leads are connected between adjacent conductive electrodes. The conductive electrodes at both ends of the lead group are electrically connected to the second driving voltage source and the common surface electrode, respectively; wherein, the N conductive electrodes in the same lead group starting from the side of the second driving voltage source correspond one-to-one with the first electrode, and the resistance value of the high-resistance lead is greater than that of the conductive electrode;

[0010] A liquid crystal layer is disposed between the first substrate and the second substrate, and the liquid crystal layer is filled with liquid crystal molecules; the liquid crystal molecules are used to realize an electrically controlled lens after the common surface electrode, each of the first electrodes, and the lead group are connected to their respective potentials.

[0011] The liquid crystal lens is configured as follows:

[0012] According to the construction instructions of the electrically controlled lens, a first potential is applied to each of the first electrodes and a second potential is applied to the common surface electrode; the actual potential of each of the first electrodes is obtained; based on the actual potential and the first potential, a corresponding third potential is applied to each of the lead groups to generate a step-down potential on the conductive electrodes on both sides of each of the high-resistivity leads in the lead group; the liquid crystal molecules in the liquid crystal layer are deflected by the potential difference between the first potential and the second potential or the potential difference between the first potential and the step-down potential, thus forming the electrically controlled lens; wherein, the first potential applied to the first electrodes of the same order in each electrode region is the same potential, and the potential difference between the actual potential of any first electrode and its corresponding step-down potential is equivalent to the potential difference between the first potential and the second potential corresponding to that first electrode.

[0013] Optionally, the resistance value of each high-resistance lead in the lead group is determined based on the ratio of the first potential to the actual potential, so that the stepped potential generated on both sides of each high-resistance lead meets the requirements.

[0014] Optionally, the liquid crystal lens is specifically configured as follows:

[0015] According to the construction instructions of the electronically controlled lens, a first potential is applied to each of the first electrodes and a second potential is applied to the common surface electrode;

[0016] Obtain the actual potential of each of the first electrodes; obtain a first ratio between the actual potential and the first potential based on the actual potential and the first potential; wherein each of the first ratios in the same electrode region is within a preset range;

[0017] According to the first ratio, a corresponding third potential is applied to each of the lead groups to generate a step-down potential on the conductive electrodes on both sides of each high-resistance lead in the lead group. The liquid crystal molecules in the liquid crystal layer are deflected by the potential difference between the first potential and the second potential or the potential difference between the first potential and the step-down potential, thus forming the electro-controlled lens.

[0018] Optionally, the lead group specifically includes: N+1 conductive electrodes, with high-resistance leads connecting adjacent conductive electrodes, and the conductive electrodes at both ends of the lead group being electrically connected to the second driving voltage source and the common surface electrode, respectively; wherein, the high-resistance leads and the conductive electrodes combine to form a conductive path, the resistance of the conductive electrodes is less than that of the high-resistance leads, and when the corresponding third potential is applied to the lead group, the corresponding step potential is assigned to each conductive electrode.

[0019] Optionally, one end of the lead group is electrically connected to the common surface electrode, and the other end is electrically connected to the second driving voltage source. An insulating layer is provided between the lead group and the common surface electrode at other positions except for the two ends.

[0020] A second aspect of the present invention discloses a control method for a liquid crystal lens, applied to the aforementioned liquid crystal lens, the method comprising:

[0021] In response to the construction instructions of the electrically controlled lens, a first potential is applied to each of the first electrodes and a second potential is applied to the common surface electrode; wherein the first potential applied to the first electrodes of the same order in each of the electrode regions is the same potential;

[0022] The actual potential of each first electrode is collected; based on the actual potential and the first potential, the third potential corresponding to each lead group is obtained;

[0023] A corresponding third potential is applied to each of the lead groups to generate a step-down potential on the conductive electrodes on both sides of each high-resistance lead in the lead group; wherein, the liquid crystal molecules in the liquid crystal layer are deflected by the potential difference between the first potential and the second potential or the potential difference between the first potential and the step-down potential, forming the electro-controlled permeation; for any first electrode: the potential difference between the actual potential and the corresponding step-down potential is equivalent to the potential difference between the first potential and the second potential corresponding to the first electrode.

[0024] The beneficial effects of this invention are as follows: 1. The first electrode group of this invention includes M electrode regions, each electrode region includes N first electrodes, and the first electrodes in the same order in each electrode region are connected to the same first driving voltage source; and lead groups corresponding to the positions of each electrode region are set on the second substrate, each lead group includes N+1 conductive electrodes, and high-resistance leads are connected between adjacent conductive electrodes. The conductive electrodes at both ends of the lead group are electrically connected to the second driving voltage source and the common surface electrode, respectively. This invention sets up the lead groups based on the factor that the potential error of the first electrode in the same electrode region has a certain regularity. The lead groups will also generate regularly changing step potentials. The regularly changing potential of the lead groups is used to compensate for the actual potential of the first electrode, so that the potential difference between the actual potential of the first electrode and its corresponding step potential is equivalent to the potential difference between the first potential and the second potential of the corresponding first electrode. Compared with the prior art, each first electrode requires a driving voltage source, in this invention, the first electrodes in the same order in each electrode region are connected to the same driving voltage source, and each lead group only requires one driving voltage source. Therefore, the present invention can compensate for the imaging effect of uneven areas while reducing the driving voltage source.

[0025] 2. The resistance value of each high-resistance lead in the lead assembly of this invention is determined based on the ratio of the first potential to the actual potential, so that the stepped potentials generated on both sides of each high-resistance lead meet the requirements. This is because the ratio of the actual potential to the first potential formed by the first electrode within the same electrode region due to process deviations is similar. Based on this, this invention determines the resistance value of the high-resistance leads, thereby improving compensation accuracy and enhancing the imaging effect of the liquid crystal lens.

[0026] 3. In this invention, one end of the lead assembly is electrically connected to a common surface electrode, and the other end is electrically connected to a second driving voltage source. An insulating layer is provided between the lead assembly and the common surface electrode at all other locations except the two ends. This invention uses an insulating layer to prevent changes in the required stepped potential caused by direct contact between the lead assembly and the common surface electrode at locations other than the two ends.

[0027] In summary, this invention, while compensating for the imaging effect of uneven areas in the liquid crystal lens, reduces the number of driving voltage sources, thereby avoiding the problem of reduced yield caused by an excessive number of hardware circuits such as driving chips. Attached Figure Description

[0028] Figure 1 This is a front view schematic diagram of a liquid crystal lens according to a specific embodiment of the present invention;

[0029] Figure 2 This is a schematic flowchart of a liquid crystal lens control method provided in a specific embodiment of the present invention. Detailed Implementation

[0030] This invention discloses a liquid crystal lens and its control method. Those skilled in the art can refer to the content of this document and appropriately modify the technical details to achieve the desired implementation. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in this invention. The methods and applications of this invention have been described through preferred embodiments. Those skilled in the art can clearly modify or appropriately change and combine the methods and applications described herein without departing from the content, spirit, and scope of this invention to implement and apply the technology of this invention.

[0031] The applicant's research revealed that, in most cases during the manufacturing process of liquid crystal lenses, the effects of process deviations on electrodes in the same area are similar or nearly identical. Therefore, potential errors occur in the electrodes within the same area, and these errors exhibit a certain regularity. This regularity can be utilized to compensate for the unevenness of the liquid crystal lens across different areas, effectively resolving the problem of uneven performance. This regularity typically manifests as the ratio of the required potential to the actual potential being the same. This is because process deviations generally result in similar electrode losses within the same area. For example, in the same area, electrode A requires a potential of 1V, but the actual potential is 0.9V; electrode B requires a potential of 2V, but the actual potential is 1.8V, and so on.

[0032] Therefore, embodiments of the present invention provide a liquid crystal lens, such as... Figure 1 As shown, the liquid crystal lens includes:

[0033] First substrate 1; First electrode group is disposed on first substrate 1, the first electrode group includes M electrode regions 2, each electrode region 2 includes N first electrodes 3, and the first electrodes 3 in the same order in each electrode region 2 are connected to the same first driving voltage source 4.

[0034] A second substrate 5 is disposed opposite to the first substrate 1; a common surface electrode 6 and lead groups 7 corresponding to the positions of each electrode region 2 are disposed on the second substrate 5. Each lead group 7 includes N+1 conductive electrodes 8, and high-resistance leads 9 are connected between adjacent conductive electrodes. The conductive electrodes 8 at both ends of the lead group 7 are electrically connected to the second driving voltage source 10 and the common surface electrode 6, respectively. Among them, the N conductive electrodes 8 in the same lead group 7 starting from the side with the second driving voltage source 10 correspond one-to-one with the first electrode 3, and the resistance value of the high-resistance lead 9 is greater than that of the conductive electrode 8.

[0035] A liquid crystal layer 11 is disposed between the first substrate 1 and the second substrate 5, and the liquid crystal layer 11 is filled with liquid crystal molecules 12; the liquid crystal molecules 12 are used to realize an electrically controlled lens after the common surface electrode 6, each first electrode 3 and lead group 7 are connected to their respective potentials.

[0036] The liquid crystal lens is configured as follows:

[0037] According to the construction instructions of the electro-optic lens, a first potential is applied to each first electrode 3 and a second potential is applied to the common surface electrode 6; the actual potential of each first electrode 3 is obtained, and according to the actual potential and the first potential, a corresponding third potential is applied to each lead group 7 so that the conductive electrodes 8 on both sides of each high-resistance lead 9 in the lead group 7 generate a step-by-step potential. The liquid crystal molecules 12 in the liquid crystal layer 11 are deflected by the potential difference between the first potential and the second potential or the potential difference between the first potential and the step-by-step potential, thus forming an electro-optic lens; wherein, the first potential applied to the first electrodes 3 of the same order in each electrode region 2 is the same potential, and the potential difference between the actual potential of any first electrode 3 and its corresponding step-by-step potential is equivalent to the potential difference between the first potential and the second potential corresponding to the first electrode 3.

[0038] It should be noted that in this embodiment of the invention, the resistance of the high-resistance lead 9 is much greater than that of the conductive electrode 8. The conductive electrode 8 is used as a wire, and the high-resistance lead 9 is used as a resistor to level the potential of adjacent high-resistance leads 9 so that the potential of the corresponding area of ​​the conductive electrode 8 is stable.

[0039] like Figure 1 As shown, Figure 1 The diagram illustrates three electrode regions 2, each containing four first electrodes 3, corresponding to three lead groups 7. Each lead group 7 includes five conductive electrodes 8 and four high-resistance leads 9. The conductive electrodes 8 on both sides are connected to the second driving voltage source 10 and the common surface electrode 6, respectively. The positions of the four conductive electrodes 8 in the same lead group 7, starting from the side connected to the second driving voltage source 10, correspond one-to-one with the positions of the first electrodes 3.

[0040] In one specific embodiment, the first potential is greater than the second potential, the first potential is greater than the third potential, and the third potential may be less than or equal to the second potential. The potentials are directional; the direction of the third potential is generally negative, opposite to the first potential.

[0041] In practical applications, the second potential is generally 0V.

[0042] It should be noted that, in this embodiment of the invention, the deviation of the first electrode 3 within the same electrode region 2 due to process influences exhibits a regularity. Then, the lead group 7 connected to the same second driving voltage source 10 generates a corresponding regularly changing potential to compensate for the first electrode 3 within the same electrode region 2. In this way, each first electrode 3 does not need to be individually connected to a driving voltage source, thus achieving compensation for the imaging effect of uneven areas in the liquid crystal lens. For example... Figure 1The illustrated embodiment has 12 first electrodes 3. If existing technologies were to compensate for the imaging effect of uneven areas in the liquid crystal lens, 12 driving voltage sources would be required. However, this embodiment only requires 7. By reducing the number of driving voltage sources while still compensating for the uneven imaging effect of the liquid crystal lens, the yield rate can be avoided due to an excessive number of hardware circuits such as driving chips. This also reduces hardware costs.

[0043] For example, electrodes in the same region are similarly affected by process deviations, resulting in potential errors that tend to follow a certain pattern. The most common pattern is that the losses in the same electrode region 2 are generally the same. For instance, electrode A in the same region requires a potential of 1V, but its actual potential is 0.9V; electrode B requires a potential of 2V, but its actual potential is 1.8V; electrode C requires a potential of 2V, but its actual potential is 2.7V, and so on. Based on this pattern, potential changes can be compensated for using lead group 7, resulting in stepped potentials of -0.1V, -0.2V, and -0.3V.

[0044] In one specific embodiment, the resistance value of each high-resistance lead 9 in the lead group 7 is determined according to the ratio of the first potential to the actual potential, so that the stepped potential generated on both sides of each high-resistance lead 9 meets the requirements.

[0045] It should be noted that when the first potential and the actual potential are the same, the resistance values ​​of each high-resistance lead 9 are also the same.

[0046] In one specific embodiment, the liquid crystal lens is specifically configured as follows:

[0047] According to the construction instructions of the electronically controlled lens, a first potential is applied to each of the first electrodes 3 and a second potential is applied to the common surface electrode 6;

[0048] The actual potential of each first electrode 3 is obtained; based on the actual potential and the first potential, the first ratio between the actual potential and the first potential is obtained; wherein, each first ratio in the same electrode region 2 is within a preset range;

[0049] According to the first ratio, a corresponding third potential is applied to each lead group 7 so that the conductive electrodes 8 on both sides of each high-resistance lead 9 in the lead group 7 generate a step-by-step potential. The liquid crystal molecules 12 in the liquid crystal layer 11 are deflected by the potential difference between the first potential and the second potential or the potential difference between the first potential and the step-by-step potential, thus forming an electrically controlled lens.

[0050] It should be noted that, in this embodiment, the potential loss of the first electrode 3 in the same electrode region 2 is generally the same or similar due to process deviations, resulting in similar first ratios for each electrode. The corresponding lead group 7 can then undergo a similar pattern of change to compensate for this.

[0051] In one specific embodiment, the lead group 7 specifically includes: N+1 conductive electrodes 8, with high-resistance leads 9 connected between adjacent conductive electrodes, and the conductive electrodes 8 at both ends of the lead group 7 being electrically connected to the second driving voltage source 10 and the common surface electrode 6, respectively; wherein, the high-resistance leads 9 and conductive electrodes 8 combine to form a conductive path, the resistance of the conductive electrodes 8 is less than that of the high-resistance leads 9, and when a corresponding third potential is applied to the lead group 7, each conductive electrode 8 is given a corresponding step potential.

[0052] It should be noted that the conductive electrodes 8 at both ends of the lead group 7 are electrically connected to the second driving voltage source 10 and the common surface electrode 6, respectively. Therefore, the potentials of the conductive electrodes 8 at both ends are the applied potential of the second driving voltage source 10 and the potential of the common surface electrode 6, respectively.

[0053] In one specific embodiment, one end of the lead group 7 is electrically connected to the common surface electrode 6, and the other end is electrically connected to the second driving voltage source 10. An insulating layer 13 is provided between the lead group 7 and the common surface electrode 6 at other positions except the two ends.

[0054] It should be noted that the insulation layer 13 is designed to prevent the required step potential from changing due to direct contact between the lead group 7 and the common surface electrode 6 at other locations except for the two ends.

[0055] The first electrode group of this embodiment includes M electrode regions 2, each electrode region 2 including N first electrodes 3. The first electrodes 3 in the same order in each electrode region 2 are connected to the same first driving voltage source 4. A lead group 7 corresponding to the position of each electrode region 2 is disposed on the second substrate 5. Each lead group 7 includes N+1 conductive electrodes 8, and high-resistance leads 9 connect adjacent conductive electrodes. The conductive electrodes 8 at both ends of the lead group 7 are electrically connected to the second driving voltage source 10 and the common surface electrode 6, respectively. This embodiment of the invention takes into account the potential error of the first electrodes 3 within the same electrode region, which has a certain regularity, to set the lead group 7. The lead group 7 also generates a regularly changing stepped potential. The regularly changing potential of the lead group 7 is used to compensate for the actual potential of the first electrode 3, so that the potential difference between the actual potential of the first electrode 3 and its corresponding stepped potential is equivalent to the potential difference between the first potential and the second potential corresponding to the first electrode 3. Compared to existing technologies where each first electrode 3 requires a separate driving voltage source, in this embodiment of the invention, the first electrodes 3 in the same order within each electrode region 2 are connected to the same driving voltage source, and each lead group 7 requires only one driving voltage source. Therefore, this embodiment of the invention can compensate for the imaging effect of uneven areas while reducing the number of driving voltage sources.

[0056] In this embodiment of the invention, the resistance value of each high-resistance lead 9 in the lead group 7 is determined based on the ratio of the first potential to the actual potential, so that the stepped potentials generated on both sides of each high-resistance lead 9 meet the requirements. This is because the ratio of the actual potential to the first potential formed by the first electrode 3 within the same electrode region 2 due to process deviations is similar. Based on this, the resistance value of the high-resistance lead 9 is determined, thereby improving compensation accuracy and enhancing the imaging effect of the liquid crystal lens.

[0057] In this embodiment of the invention, one end of the lead assembly 7 is electrically connected to the common surface electrode 6, and the other end is electrically connected to the second driving voltage source 10. An insulating layer 13 is provided between the lead assembly 7 and the common surface electrode 6 at all other locations except the two ends. This embodiment of the invention uses the insulating layer 13 to prevent changes in the required stepped potential caused by direct contact between the lead assembly 7 and the common surface electrode 6 at other locations except the two ends.

[0058] In summary, the embodiments of the present invention, while compensating for the imaging effect of uneven areas of the liquid crystal lens, reduce the number of driving voltage sources, thereby avoiding the problem of reduced yield caused by an excessive number of hardware circuits such as driving chips.

[0059] Based on the liquid crystal lens provided above, embodiments of the present invention also provide a control method for the liquid crystal lens, such as... Figure 2 As shown, the method includes:

[0060] S201: In response to the construction command of the electronically controlled lens, a first potential is applied to each of the first electrodes and a second potential is applied to the common surface electrode.

[0061] In each electrode region, the first potential applied to the first electrode in the same order is the same potential.

[0062] Step S202: Collect the actual potential of each first electrode; based on the actual potential and the first potential, obtain the third potential corresponding to each lead group.

[0063] Step S203: Apply the corresponding third potential to each lead group to generate a step-by-step potential on the conductive electrodes on both sides of each high-resistance lead in the lead group.

[0064] In this process, the liquid crystal molecules in the liquid crystal layer are deflected by the potential difference between the first potential and the second potential, or the potential difference between the first potential and the ladder, thus forming an electrically controlled permeable layer; for any first electrode: the potential difference between the actual potential and the corresponding ladder potential is equivalent to the potential difference between the first potential and the second potential corresponding to the first electrode.

[0065] The method of this invention can effectively control each driving voltage source, and compensate for the imaging effect of uneven areas of the liquid crystal lens by reducing the driving voltage source corresponding to the lens in this invention.

[0066] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0067] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A liquid crystal lens, characterized in that, The liquid crystal lens includes: A first substrate; a first electrode group is disposed on the first substrate, the first electrode group includes M electrode regions, each electrode region includes N first electrodes, and the first electrodes in the same order in each electrode region are connected to the same first driving voltage source. A second substrate is disposed opposite to the first substrate; the second substrate is provided with a common surface electrode and lead groups corresponding to the positions of each electrode area. Each lead group includes N+1 conductive electrodes, and high-resistance leads are connected between adjacent conductive electrodes. The conductive electrodes at both ends of the lead group are electrically connected to the second driving voltage source and the common surface electrode, respectively. Among them, the N conductive electrodes in the same lead group starting from the side of the second driving voltage source correspond one-to-one with the first electrode. The high-resistance leads and the conductive electrodes are combined to form a conductive path. The resistance value of the high-resistance leads is greater than that of the conductive electrodes. When a corresponding third potential is applied to the lead group, a corresponding step potential is assigned to each conductive electrode. A liquid crystal layer is disposed between the first substrate and the second substrate, and the liquid crystal layer is filled with liquid crystal molecules; the liquid crystal molecules are used to realize an electrically controlled lens after the common surface electrode, each of the first electrodes, and the lead group are connected to their respective potentials. The resistance value of each high-resistance lead in the lead group is determined according to the ratio of the first potential to the actual potential, so that the stepped potential generated on both sides of each high-resistance lead meets the requirements. The liquid crystal lens is configured as follows: According to the construction instructions of the electrically controlled lens, a first potential is applied to each of the first electrodes and a second potential is applied to the common surface electrode; the actual potential of each of the first electrodes is obtained, and a first ratio between the actual potential and the first potential is obtained based on the actual potential and the first potential; wherein, each of the first ratios in the same electrode region is within a preset range; according to the first ratio, a corresponding third potential is applied to each of the lead groups to generate a step-down potential on the conductive electrodes on both sides of each high-resistance lead in the lead group, and the liquid crystal molecules in the liquid crystal layer are deflected by the potential difference between the first potential and the second potential or the potential difference between the first potential and the step-down potential, thus forming the electrically controlled lens; wherein, the first potential applied to the first electrodes of the same order in each electrode region is the same potential, and the potential difference between the actual potential of any first electrode and its corresponding step-down potential is equivalent to the potential difference between the first potential and the second potential corresponding to that first electrode.

2. The liquid crystal lens according to claim 1, characterized in that, One end of the lead assembly is electrically connected to the common surface electrode, and the other end is electrically connected to the second driving voltage source. An insulating layer is provided between the lead assembly and the common surface electrode at the other positions except for the two ends.

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