Lenses and eyeglasses

Abstract

This application provides a lens and eyeglasses, relating to the field of optical technology, comprising: a first optical module and a second optical module disposed by optical adhesive layers; a first liquid crystal layer in the first optical module is configured to exhibit a convex lens optical effect based on a first electric field between a first driving electrode layer and a first common electrode layer, the intensity of the first electric field being adjustable; a second liquid crystal layer in the second optical module is configured to exhibit a prism optical effect based on a second electric field between a second driving electrode layer and a second common electrode layer, the intensity of the second electric field being adjustable. The optical power and prism power of this lens can be dynamically adjusted according to usage needs, thereby allowing the same pair of eyeglasses to adapt to different eye use scenarios, eliminating the need for frequent replacement of everyday glasses and reading / writing glasses, thus reducing usage costs and improving wearing convenience and myopia control effectiveness.

Description

Technical Field

[0001] This application relates to the field of optical technology, and more specifically, to lenses and eyeglasses. Background Technology

[0002] With the development of optical technology, prism-lens composite glasses have been applied in the field of myopia prevention and control for teenagers. These glasses utilize the refractive effect of prisms and the converging effect of lenses to reduce the convergence of the human eye when looking at near objects and relax accommodation, transforming the near object distance into an equivalent far object distance. This allows users to see near objects clearly while keeping their eyes in a relatively relaxed state during reading and writing, thus slowing down the progression of myopia.

[0003] However, because the refractive correction requirements differ between reading and writing scenarios and everyday distance viewing scenarios, myopia control typically requires separate glasses for daily life and reading / writing, which users must manually switch between in different situations. This not only increases the cost of use, but the frequent switching of glasses is also difficult for teenagers to maintain long-term, resulting in unsatisfactory myopia control effects. Summary of the Invention

[0004] This application provides a lens and eyeglasses, the optical power and prism power of which can be dynamically adjusted according to usage needs, so that the same pair of eyeglasses can adapt to different eye use scenarios, eliminating the need to frequently change daily wear glasses and reading glasses, which helps to reduce usage costs and improve wearing convenience and myopia control effects.

[0005] In a first aspect, a lens is provided, comprising: a first optical module and a second optical module disposed by an optical adhesive layer; the first optical module comprising: a first transparent substrate and a second transparent substrate disposed opposite to each other, the second transparent substrate being in contact with the optical adhesive; a first driving electrode layer and a first common electrode layer disposed opposite to each other, the first driving electrode layer and the first common electrode layer being sandwiched between the first transparent substrate and the second transparent substrate; a first liquid crystal layer being sandwiched between the first driving electrode layer and the first common electrode layer; the second optical module comprising: a third transparent substrate and a fourth transparent substrate disposed opposite to each other, the third transparent substrate being in contact with the optical adhesive; a second driving electrode layer and a second common electrode layer disposed opposite to each other, the second driving electrode layer and the second common electrode layer being sandwiched between the third transparent substrate and the fourth transparent substrate; a second liquid crystal layer being sandwiched between the second driving electrode layer and the second common electrode layer; wherein the first liquid crystal layer is configured to exhibit a convex lens optical effect based on a first electric field between the first driving electrode layer and the first common electrode layer, the intensity of the first electric field being adjustable; the second liquid crystal layer is configured to exhibit a prism optical effect based on a second electric field between the second driving electrode layer and the second common electrode layer, the intensity of the second electric field being adjustable.

[0006] In conjunction with the first aspect, in some implementations of the first aspect, the first electric field gradually decreases along the radial direction of the lens; when the lens is a left spectacle lens, the second electric field gradually increases along the first direction of the lens; when the lens is a right spectacle lens, the second electric field gradually increases along the second direction of the lens; wherein the first direction is the direction from the left edge to the right edge of the lens, and the second direction is opposite to the first direction.

[0007] In conjunction with the first aspect, in some implementations of the first aspect, the first driving electrode layer includes: a first sub-electrode layer, which is concentrically coiled, with a first lead disposed at the edge of the first sub-electrode layer and a second lead disposed at the center of the first sub-electrode layer, the first lead and the second lead being used to connect to voltage sources at different potentials; a first insulating layer covering the first sub-electrode layer; and a second sub-electrode layer covering the first insulating layer, the second sub-electrode layer including a plurality of concentrically arranged first electrode units, each first electrode unit being electrically connected to different positions of the first sub-electrode layer through vias.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the first driving electrode layer further includes: a first high-resistivity film, the first high-resistivity film covering a plurality of first electrode units.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the first driving electrode layer includes a plurality of concentrically arranged second electrode units, each of which is connected to an independent third lead. The plurality of third leads are used to connect to voltage sources at different potentials, so that the first electric field drives the first liquid crystal layer to present the optical effect of a Fresnel lens.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the second driving electrode layer includes: a third sub-electrode layer, which is planar, with a fourth lead at a first end near the left edge of the lens and a fifth lead at a second end near the right edge of the lens, the fourth and fifth leads being used to connect to voltage sources at different potentials; a second insulating layer covering the third sub-electrode layer; and a fourth sub-electrode layer covering the second insulating layer, the fourth sub-electrode layer including multiple parallel third electrode units, each third electrode unit being strip-shaped and extending perpendicular to the first direction, each third electrode unit being electrically connected to different positions of the third sub-electrode layer through a via.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the second driving electrode layer includes: a second high-resistivity film covering a plurality of third electrode units.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the second driving electrode layer includes: a continuous zigzag electrode, a fourth lead being provided at a first end of the zigzag electrode near the left edge of the lens, and a fifth lead being provided at a second end of the zigzag electrode near the right edge of the lens, the fourth lead and the fifth lead being used to connect to voltage sources of different potentials; and a second high-resistivity film covering the zigzag electrode.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the liquid crystal molecules in the first liquid crystal layer and the second liquid crystal layer are blue phase liquid crystals.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the liquid crystal molecules in the first liquid crystal layer and the second liquid crystal layer are nematic liquid crystals, and the first optical module further includes: a first alignment layer and a second alignment layer disposed opposite to each other, the first alignment layer and the second alignment layer sandwiched between the first driving electrode layer and the first common electrode layer, and the first liquid crystal layer sandwiched between the first alignment layer and the second alignment layer; the second optical module further includes: a third alignment layer and a fourth alignment layer disposed opposite to each other, the third alignment layer and the fourth alignment layer sandwiched between the second driving electrode layer and the second common electrode layer, and the second liquid crystal layer sandwiched between the third alignment layer and the fourth alignment layer.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the first liquid crystal layer includes a first sub-liquid crystal layer and a second sub-liquid crystal layer stacked together; the second liquid crystal layer includes a third sub-liquid crystal layer and a fourth sub-liquid crystal layer stacked together; the first optical module further includes a first intermediate alignment layer sandwiched between the first sub-liquid crystal layer and the second sub-liquid crystal layer; the second optical module further includes a second intermediate alignment layer sandwiched between the third sub-liquid crystal layer and the fourth sub-liquid crystal layer; wherein the orientation of the liquid crystal in the first sub-liquid crystal layer is orthogonal to the orientation of the liquid crystal in the second sub-liquid crystal layer, and the orientation of the liquid crystal in the third sub-liquid crystal layer is orthogonal to the orientation of the liquid crystal in the fourth sub-liquid crystal layer.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the lens further includes a polarizer located on the side of the first optical module away from the second optical module.

[0017] In a second aspect, eyeglasses are provided, comprising: a frame including a lens and temples; and a lens as proposed in any possible implementation of the first aspect, the lens being shaped to fit the lens.

[0018] In conjunction with the second aspect, in some implementations of the second aspect, the glasses also include: a power supply unit connected to leads in the lens to output a voltage signal, the voltage value of which is related to the lens prescription.

[0019] In conjunction with the second aspect, in some implementations of the second aspect, the eyeglasses further include: an adjustment member disposed on the frame and electrically connected to the power supply unit, the adjustment member being configured to adjust the voltage value of the voltage signal.

[0020] In conjunction with the second aspect, in some implementations of the second aspect, the eyeglasses further include: a data interface disposed on the frame, the data interface being configured to receive the user's refraction data; and a control unit electrically connected to both the data interface and the power supply unit, the control unit being configured to control the voltage value of the voltage signal output by the power supply unit according to the refraction data.

[0021] In conjunction with the second aspect, in some implementations of the second aspect, the glasses further include: a sensing unit disposed on the frame and electrically connected to the control unit, the sensing unit being configured to detect the viewing distance of the human eye, and the control unit being further configured to control the voltage value of the voltage signal output by the power supply unit according to the viewing distance of the human eye.

[0022] In conjunction with the second aspect, in some implementations of the second aspect, the sensing unit includes a gyroscope, an eye-tracking sensor, and a distance sensor.

[0023] Based on the above technical solution, liquid crystal layers are introduced into the first and second optical modules of the lens, respectively, and the two liquid crystal layers are driven by a variable electric field to present the optical effects of a convex lens and a prism. Since the electric field can be adjusted by an external voltage signal, the optical power and prism power of the lens can be changed in real time according to usage needs, allowing the same pair of glasses to adapt to different visual scenarios without the need for frequent changes between everyday glasses and reading / writing glasses. The compact structure of this lens helps reduce lens thickness and weight, thereby improving the user's wearing experience. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a prism-lens composite lens; Figure 2 This is a schematic diagram of the structure of a lens 200 according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a first driving electrode layer 13 according to an embodiment of this application; Figure 4 This is a schematic diagram of another structure of the first driving electrode layer 13 proposed in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of a second driving electrode layer 23 according to an embodiment of this application; Figure 6 This is a schematic diagram of another structure of the second driving electrode layer 23 proposed in the embodiments of this application; Figure 7This is a schematic diagram of the voltage distribution of the second driving electrode layer 23 according to an embodiment of this application; Figure 8 This is a schematic diagram of the structure of another lens 200 proposed in the embodiments of this application; Figure 9 This is a schematic diagram of the structure of another lens 200 proposed in the embodiments of this application; Figure 10 This is a schematic diagram of the structure of a pair of glasses 300 proposed in an embodiment of this application. Detailed Implementation

[0025] This application will present various aspects, embodiments, or features relating to a system comprising multiple devices, components, modules, etc. It should be understood and appreciated that individual systems may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Furthermore, combinations of these approaches are also possible. Furthermore, in the embodiments of this application, the words "exemplary," "for example," etc., are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" in the embodiments of this application should not be construed as being better or more advantageous than other embodiments or design schemes. Specifically, the use of the term "exemplary" is intended to present the concept in a concrete manner. The business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0026] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0027] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0028] In the description of the embodiments of this application, the terms "upper," "lower," "left," "right," "inner," "outer," "vertical," and "horizontal," etc., indicate the orientation or positional relationship relative to the orientation or position of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and not to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They can change accordingly depending on the orientation of the components in the accompanying drawings, and therefore should not be construed as limiting this application.

[0029] In the embodiments of this application, the same reference numerals are used to denote the same component or part. For the same part in the embodiments of this application, only one part or component may be labeled with reference numerals in the figures. It should be understood that the reference numerals also apply to other identical parts or components. In addition, the various parts in the figures are not drawn to scale, and the dimensions and sizes of the parts shown in the figures are only exemplary and should not be construed as limiting this application.

[0030] The occurrence and progression of myopia are closely related to prolonged close-range visual activity. When the human eye focuses on a near object, two physiological mechanisms, accommodation and convergence, need to be activated simultaneously. Accommodation refers to the contraction of the ciliary muscle and the convexity of the lens, increasing refractive power to focus diverging light rays from near objects onto the retina; convergence refers to the contraction of the medial rectus muscles of both eyes, causing the visual axes of the left and right eyes to deflect nasally and converge on the near object, maintaining binocular single vision. Prolonged, high-intensity close-range visual activity will lead to ciliary muscle spasm and extraocular muscle fatigue, which are key factors in inducing and worsening myopia.

[0031] With the development of optical technology, prism-transparent composite glasses have been applied in the field of myopia control. These glasses use the optical combination of a convex lens and a base-inward prism to regulate the light entering the eye, thereby reducing eye strain during close work.

[0032] Figure 1This is a schematic diagram of the structure of a prism composite lens.

[0033] refer to Figure 1 As shown, the prism-lens composite lens processes incident light from a nearby target by combining a prism and a convex lens in the optical path.

[0034] A convex lens has the ability to converge light rays. When diverging light rays emitted from nearby objects such as books or screens first pass through a convex lens, the lens applies a positive refractive force to the light rays, reducing their divergence and bringing them closer to parallel light. Near images that would normally require the eye to exert all its accommodative effort to focus can be focused with less effort after being processed by a convex lens. This significantly reduces the contraction strength of the ciliary muscle, allowing the eye to relax.

[0035] Figure 1 The prism-guided lens shown contains a base-in (BI) prism, which reduces convergence load. The prism's optical characteristic is to deflect incident light rays towards its base. When the prism is configured with its base facing the nose and its apex facing the temporal side, the light rays entering both eyes are pre-deflected towards the nose. From an optical axis perspective, without prism intervention, near vision requires a large convergence angle between the optical axes of both eyes at the target; however, with the introduction of this prism, the incoming light rays converge towards the nose, reducing the need for convergence between the optical axes of both eyes. This results in an eye position closer to the relaxed state when viewing distant targets, thus reducing the load on the medial rectus muscle.

[0036] In this application, "near" can be understood as the location of a target that requires the human eye to use a relatively strong adjustment and convergence to see clearly, and "far" can be understood as the location of a target that the human eye can see clearly without using adjustment or with only a small amount of adjustment.

[0037] Based on the aforementioned synergistic effect of optics and physiology, prism-lens composite lenses can reduce eye strain when viewing near objects. This allows users to clearly identify near targets while both accommodation and convergence remain relaxed, thus slowing down eye fatigue and myopia progression caused by continuous close-range eye use. Consequently, when viewing near objects such as books, the actual amount of accommodation and convergence used is reduced, and the eye state is close to the relaxed state when looking at distant objects.

[0038] However, existing prism composite lenses face technical and usage bottlenecks in practical applications.

[0039] First, the refractive correction requirements for reading and writing scenarios differ fundamentally from those for everyday distance viewing. The convex lenses and prisms in prism-lens composite lenses are designed for near work. If used directly for distance viewing, the convex lenses will cause overcorrection, resulting in blurred images of distant targets; the introduction of prisms will also interfere with normal eye alignment, affecting stereoscopic vision at distances. Therefore, currently, separate everyday glasses and reading / writing glasses are typically required, which users must manually switch between for different scenarios. This not only increases the cost of use but also places extremely high demands on user compliance.

[0040] Secondly, the limitations of the existing physical structure of prism-lens composite lenses further restrict the wearing experience. Traditional prism-lens composite lenses achieve functional integration by physically stacking prisms and convex lenses or by using a progressive multifocal design, resulting in a significant increase in lens thickness and weight.

[0041] Among the aforementioned issues, the needs of adolescents are particularly prominent. Adolescents are in a critical period of visual development, and their daily studies lead to prolonged and intensive close-range visual activity, making them a high-risk group for myopia progression. Furthermore, carrying and changing two pairs of glasses is inconvenient and difficult for adolescents to maintain long-term, ultimately resulting in unsatisfactory myopia control effects.

[0042] In view of this, embodiments of this application provide a lens and eyeglasses, the optical power and prism power of which can be dynamically adjusted according to usage needs, so that the same pair of eyeglasses can adapt to different eye use scenarios, eliminating the need to frequently change everyday glasses and reading glasses, which helps to reduce usage costs and improve wearing convenience and myopia control effects.

[0043] Figure 2 This is a schematic diagram of the structure of a lens 200 according to an embodiment of this application. The schematic diagram shows a side cross-sectional view of the lens 200 to illustrate the film structure of the lens 200.

[0044] refer to Figure 2 As shown, the lens 200 includes: a first optical module 10 and a second optical module 20 stacked together by optical adhesive 30; Furthermore, the aforementioned first optical module 10 includes: The first transparent substrate 11 and the second transparent substrate 12 are disposed opposite to each other, and the second transparent substrate 12 is in contact with the optical adhesive 30; The first driving electrode layer 13 and the first common electrode layer 14 are disposed opposite to each other, and are sandwiched between the first transparent substrate 11 and the second transparent substrate 12. A first liquid crystal layer 15 is sandwiched between a first driving electrode layer 13 and a first common electrode layer 14. The aforementioned second optical module 20 includes: The third transparent substrate 21 and the fourth transparent substrate 22 are arranged opposite to each other, with the third transparent substrate 21 in contact with the optical adhesive 30; The second driving electrode layer 23 and the second common electrode layer 24 are disposed opposite to each other, and are sandwiched between the third transparent substrate 21 and the fourth transparent substrate 22. The second liquid crystal layer 25 is sandwiched between the second driving electrode layer 23 and the second common electrode layer 24. The first liquid crystal layer 15 is configured to exhibit a convex lens optical effect based on a first electric field between the first driving electrode layer 13 and the first common electrode layer 14, and the first electric field is adjustable; the second liquid crystal layer 25 is configured to exhibit a prism optical effect based on a second electric field between the second driving electrode layer 23 and the second common electrode layer 24, and the second electric field is adjustable.

[0045] It should be noted that the aforementioned adjustable first electric field refers to the adjustable voltage difference between the first driving electrode layer 13 and the first common electrode layer 14, i.e., the adjustable electric field strength, thereby changing the effective refractive index at various points in the first liquid crystal layer 15 to adjust the optical power of the convex lens. The aforementioned adjustable second electric field refers to the adjustable voltage difference between the second driving electrode layer 23 and the second common electrode layer 24, i.e., the adjustable electric field strength, thereby changing the effective refractive index at various points in the second liquid crystal layer 25 to adjust the prism's prism power. Furthermore, the gradient distribution of the first electric field along the radial direction of the lens 200 and the gradient distribution of the second electric field along the horizontal direction of the lens 200 are determined by the electrode patterns of their respective driving electrode layers and can remain unchanged during electric field adjustment.

[0046] In some possible embodiments, the first transparent substrate 11, the second transparent substrate 12, the third transparent substrate 21 and the fourth transparent substrate 22 may be made of soda-lime glass substrate with a thickness of 0.5 mm. This thickness can ensure sufficient mechanical strength to support the liquid crystal cell while maintaining the overall thinness and lightness of the lens 200.

[0047] In some possible embodiments, where further improvements in thermal shock resistance are required, the aforementioned transparent substrates can also be replaced with borosilicate glass substrates; correspondingly, the thickness can be appropriately adjusted within the range of 0.3 mm to 1.0 mm according to actual needs.

[0048] In some possible embodiments, where a significant reduction in lens weight is required, the aforementioned transparent substrates can also be made of polyethylene terephthalate (PET) resin, with the thickness appropriately adjusted within the range of 0.3 mm to 0.7 mm according to actual needs. Compared to glass substrates, PET resin substrates have a lower density, which helps to further reduce the overall weight of the lens, and the PET material has a certain degree of flexibility, which can improve the safety of the lens when subjected to external impact.

[0049] In some possible embodiments, the first driving electrode layer 13, the first common electrode layer 14, the second driving electrode layer 23, and the second common electrode layer 24 are typically made of indium tin oxide (ITO) thin film. This material has high transmittance in the visible light band and low sheet resistance, which is beneficial for reducing the driving voltage. Of course, it can also be replaced with other transparent conductive oxide thin films such as aluminum-doped zinc oxide (AZO) thin film or indium zinc oxide (IZO) thin film.

[0050] In some possible embodiments, the thicknesses of the first driving electrode layer 13, the first common electrode layer 14, the second driving electrode layer 23, and the second common electrode layer 24 can be controlled within the range of 100nm to 200nm. They are deposited on the surface of the corresponding film structure by magnetron sputtering or chemical vapor deposition, and then the desired electrode pattern is formed by photolithography and wet etching.

[0051] In some possible embodiments, the optical adhesive 30 can be optically clear adhesive (OCA), which has a refractive index similar to that of the glass substrate, and is used to bond the first optical module 10 and the second optical module 20 while avoiding interface reflection. The optical adhesive 30 can also be replaced with other optical adhesives with UV curing or thermosetting properties to adapt to different process conditions. For example, optical adhesives with UV curing properties can be adapted to the characteristics of PET resin substrates that are not suitable for long-term high-temperature processing.

[0052] In some possible embodiments, during the fabrication process, a first driving electrode layer 13 and a first common electrode layer 14 can be fabricated on the inner surfaces of the first transparent substrate 11 and the second transparent substrate 12, respectively, and a first liquid crystal layer 15 can be poured between them. A first liquid crystal cell is then formed by bonding the two layers together with a sealant. Similarly, a second driving electrode layer 23, a second common electrode layer 24, and a second liquid crystal layer 25 are fabricated between the third transparent substrate 21 and the fourth transparent substrate 22 to form a second liquid crystal cell. Finally, the second transparent substrate 12 and the third transparent substrate 21 are bonded together with optical adhesive 30 to complete the assembly of the lens 200.

[0053] The liquid crystal molecules in the first liquid crystal layer 15 and the second liquid crystal layer 25 exhibit optical anisotropy. When a voltage is applied between the first driving electrode layer 13 and the first common electrode layer 14, the liquid crystal molecules in the first liquid crystal layer 15 are deflected under the action of the first electric field. This allows the effective refractive index distribution of the first liquid crystal layer 15 in the direction perpendicular to the first transparent substrate 11 and the second transparent substrate 12 to adapt to the electric field distribution, and the effective refractive index changes with the electric field strength. Similarly, the liquid crystal molecules in the second liquid crystal layer 25 are deflected accordingly under the action of the second electric field between the second driving electrode layer 23 and the second common electrode layer 24. This allows the effective refractive index distribution of the second liquid crystal layer 25 in the direction perpendicular to the third transparent substrate 21 and the fourth transparent substrate 22 to adapt to the electric field distribution, and the effective refractive index changes with the electric field strength.

[0054] In order for the first liquid crystal layer 15 to exhibit the optical effect of a convex lens based on the first electric field, the first electric field can be configured as follows: the first electric field gradually decreases along the radial direction of the lens 200.

[0055] In order for the second liquid crystal layer 25 to exhibit the optical effect of a prism based on the second electric field, the second electric field can be configured as follows: When lens 200 is a left spectacle lens, the second electric field gradually increases along the first direction of lens 200; When lens 200 is the right spectacle lens, the second electric field gradually increases along the second direction of lens 200; The first direction is from the left edge to the right edge of the lens 200, and the second direction is opposite to the first direction.

[0056] Based on this, for the first liquid crystal layer 15, by configuring the electrode pattern and applied voltage of the first driving electrode layer 13, a distribution with different effective refractive indices in the central and edge regions can be formed within the first liquid crystal layer 15. This results in different phase delays in the radial direction of the light passing through the first liquid crystal layer 15, exhibiting a wavefront modulation effect similar to a convex lens, thereby achieving the optical effect of a convex lens. For the second liquid crystal layer 25, by configuring the electrode pattern and applied voltage of the second driving electrode layer 23, a linearly varying refractive index gradient can be formed in the second liquid crystal layer 25 in the horizontal direction (i.e., the aforementioned first or second direction). This causes the outgoing light axis to deflect at a uniform angle relative to the incident light axis, thereby achieving the optical effect of a prism. Since both the first and second electric fields can be adjusted by an external voltage signal, the optical power and prism power of the lens 200 can be dynamically changed according to usage requirements.

[0057] Based on the above technical solution, liquid crystal layers are introduced into the first and second optical modules of the lens, respectively, and the two liquid crystal layers are driven by a variable electric field to present the optical effects of a convex lens and a prism. Since the electric field can be adjusted by an external voltage signal, the optical power and prism power of the lens can be changed in real time according to usage needs, allowing the same pair of glasses to adapt to different visual scenarios without the need for frequent changes between everyday glasses and reading / writing glasses. The compact structure of this lens helps reduce lens thickness and weight, thereby improving the user's wearing experience.

[0058] In some possible embodiments, reference Figure 2 As shown, the first optical module 10 can be disposed on the side of the lens 200 away from the human eye, and the second optical module 20 can be disposed on the side of the lens 200 closer to the human eye. Of course, it is not excluded that the first optical module 10 can be disposed on the side of the lens 200 closer to the human eye, while the second optical module 20 can be disposed on the side of the lens 200 away from the human eye.

[0059] As described above, the electrode patterns of the first driving electrode layer 13 and the second driving electrode layer 23 determine the spatial distribution of the first and second electric fields, respectively. These spatial distributions, in turn, determine the effective refractive index distribution within the first liquid crystal layer 15 and the second liquid crystal layer 25, thereby determining the convex lens optical effect and prism optical effect exhibited by the lens 200, respectively. The electrode structures of the first driving electrode layer 13 and the second driving electrode layer 23 will be described in detail below with reference to specific embodiments.

[0060] Figure 3 This is a schematic diagram of the structure of a first driving electrode layer 13 proposed in an embodiment of this application.

[0061] In some possible embodiments, reference is made to the foregoing. Figure 2It can be seen that the aforementioned first driving electrode layer 13 may include: First sub-electrode layer 131, as described above Figure 3 Image (a) shows a top view of the first sub-electrode layer 131, see reference. Figure 3 As can be seen from (a) in the figure, the first sub-electrode layer 131 is concentrically coiled, the edge of the first sub-electrode layer 131 is provided with a first lead 01, and the center of the first sub-electrode layer 131 is provided with a second lead 02. The first lead 01 and the second lead 02 are used to connect to voltage sources with different potentials. The first insulating layer 133 covers the first sub-electrode layer 131 to provide electrical isolation. The second sub-electrode layer 132, as described above Figure 3 Image (b) shows a top view of the second sub-electrode layer 132, see reference. Figure 3 As can be seen from (b) above, the second sub-electrode layer 132 covers the first insulating layer 133, and the second sub-electrode layer 132 includes a plurality of concentrically arranged first electrode units 1321; referring to the above... Figure 2 As shown, each of the first electrode units 1321 can be electrically connected to different positions of the first sub-electrode layer 131 through the via 06 (which is opened in the first insulating layer 133).

[0062] The first sub-electrode layer 131 is concentrically coiled, and its overall shape is similar to a planar spiral resistor. This gives the first sub-electrode layer 131 a certain surface resistance. When the first lead 01 and the second lead 02 are connected to voltage sources with different potentials, the current flows along the coiling path of the first sub-electrode layer 131, forming a continuous voltage drop on the first sub-electrode layer 131. Therefore, the potentials at different radial positions on the first sub-electrode layer 131 are different.

[0063] Each first electrode unit 1321 in the second sub-electrode layer 132 is electrically connected to different radial positions of the first sub-electrode layer 131 through a via 06 formed on the first insulating layer 133, thereby leading the potential at different radial positions on the first sub-electrode layer 131 to the corresponding first electrode unit 1321. Since the first common electrode layer 14 is usually a whole-surface electrode and is at a uniform potential, each first electrode unit 1321 has a different potential difference relative to the first common electrode layer 14, thereby forming a first electric field that gradually changes radially within the first liquid crystal layer 15.

[0064] In some possible embodiments, the width of each of the first electrode units 1321 can be set to 3μm to 8μm, and the spacing between adjacent first electrode units 1321 can be set to 3μm to 12μm. This size range is beneficial to ensure the accuracy of electric field control while avoiding electric field crosstalk between adjacent electrode units.

[0065] Under the action of the first electric field, the effective refractive index of the first liquid crystal layer 15 in the radial direction changes accordingly, causing the light passing through the lens 200 to produce a centrally converging phase delay, thus exhibiting the optical effect of a convex lens.

[0066] In some possible embodiments, in order to ensure that the pressure difference between the first electrode units 1321 can be smoothly transitioned and that the sudden change in pressure difference will not affect the control effect of the lens 200 on light, the first driving electrode layer 13 may further include: a first high-resistivity film 134, which covers a plurality of first electrode units 1321.

[0067] In some possible embodiments, the first high-resistivity film 134 can be a thin film formed by a composite of materials such as silicon dioxide (SiO2), indium oxide (In2O3) and zirconium oxide (ZrO2). The composite coating of the above materials can provide the required resistance characteristics while ensuring optical transmittance.

[0068] In some possible embodiments, the resistivity of the first high-resistivity film 134 described above can be controlled at 10. 8 Ω·cm to 10 18 Within the range of Ω·cm, this resistivity range allows the first high-resistivity film 134 to form a continuous resistance path between adjacent first electrode units 1321, thereby converting discrete step voltage differences into continuously changing voltage differences, avoiding abrupt changes in the effective refractive index of the first liquid crystal layer 15, and improving the smoothness of light control by the lens 200.

[0069] In some possible embodiments, the thickness of the first high-resistivity film 134 can be controlled in the range of 50 nm to 200 nm and formed on the surface of the second sub-electrode layer 132 by magnetron sputtering or chemical vapor deposition. This thickness can reduce the impact on optical transmittance while ensuring the resistance characteristics.

[0070] In some possible embodiments, the first insulating layer 133 can be made of inorganic insulating materials such as silicon nitride film or silicon dioxide film, and the thickness can be controlled in the range of 200nm to 500nm. This thickness can reduce the process difficulty of preparing via 06 while ensuring good insulation performance.

[0071] In some possible embodiments, the first insulating layer 133 may also be made of organic resin material, and the thickness may be appropriately adjusted in the range of 1μm to 3μm according to actual needs. Organic resin material has a good planarization effect, which is beneficial to improving the surface morphology of the upper film layer.

[0072] In some possible embodiments, the via 06 can be patterned on the first insulating layer 133 by photolithography, and then penetrate the first insulating layer 133 by dry etching or wet etching, so as to expose the corresponding position of the first sub-electrode layer 131 and form an electrical connection with the first electrode unit 1321 above it.

[0073] In some possible embodiments, reference Figure 2 As shown, the first sub-electrode layer 131 can be located on the side of the first insulating layer 133 closer to the human eye, and the second sub-electrode layer 132 can be located on the side of the first insulating layer 133 away from the human eye. Of course, it is not excluded that the first sub-electrode layer 131 can be located on the side of the first insulating layer 133 away from the human eye, and the second sub-electrode layer 132 can be located on the side of the first insulating layer 133 closer to the human eye.

[0074] Based on the above technical solution, by using the concentrically wound first sub-electrode layer as a resistive voltage divider structure, different potentials can be generated on multiple first electrode units with only two leads, eliminating the need to draw leads separately for each first electrode unit. This simplifies the driving circuit structure and fabrication process. The first insulating layer achieves electrical isolation between the upper and lower electrode layers and enables electrical connection through vias, allowing the second sub-electrode layer to obtain the required gradient potential distribution. This, in turn, forms a radially varying first electric field within the liquid crystal layer, causing the lens to exhibit the optical effect of a convex lens.

[0075] Figure 4 This is a schematic diagram of another first driving electrode layer 13 proposed in the embodiments of this application.

[0076] refer to Figure 4 As shown, the first driving electrode layer 13 may include a plurality of concentrically arranged second electrode units 1322, each of which is connected to an independent third lead 03. The plurality of third leads 03 are used to connect to voltage sources at different potentials so that the first electric field drives the first liquid crystal layer 15 to present the optical effect of a Fresnel lens.

[0077] The aforementioned multiple second electrode units 1322 are arranged in a concentric ring, with each second electrode unit 1322 corresponding to a ring region of a Fresnel lens. When each third lead 03 is connected to a voltage source with a different potential, each second electrode unit 1322 has an independent potential difference relative to the first common electrode layer 14, thereby generating different electric field intensities in each ring region within the first liquid crystal layer 15. Within each ring region, the effective refractive index of the first liquid crystal layer 15 changes accordingly based on the electric field intensity, forming a phase step similar to that of a Fresnel lens between adjacent rings. This causes the light passing through the lens 200 to converge as a whole, thus exhibiting the optical effect of a Fresnel lens. Compared to a continuous convex lens structure, the Fresnel lens structure, by discretizing the continuous phase distribution into multiple rings, can reduce the number of electrode layers required while maintaining converging ability, which helps to simplify the film structure and fabrication process of the first driving electrode layer 13.

[0078] In some possible embodiments, the second electrode unit 1322 may be made of ITO thin film, and a concentric ring pattern may be formed on the surface of the first transparent substrate 11 by photolithography and wet etching processes. The second electrode units 1322 are spaced 3μm to 12μm apart. This spacing can reduce the impact of optical abrupt changes while avoiding short circuits between adjacent electrodes.

[0079] In some possible embodiments, the corresponding ring width can be set according to the radial position of the second electrode unit 1322 on the lens 200. The ring width of the second electrode unit 1322 near the center can be set in the range of 3μm to 8μm, and the ring width of the second electrode unit 1322 far from the center can be appropriately increased. This setting is beneficial to reduce the number of electrodes in the peripheral area while ensuring optical resolution.

[0080] Based on the above technical solution, by connecting multiple concentrically arranged second electrode units to independent leads, the continuous phase distribution is discretized into multiple rings, so that the first liquid crystal layer can exhibit the optical effect of a Fresnel lens under the drive of the first electric field. While maintaining the converging ability, the number of electrode layers and film structure are simplified, which helps to reduce the fabrication difficulty.

[0081] Figure 5 This is a schematic diagram of the structure of a second driving electrode layer 23 proposed in an embodiment of this application.

[0082] In some possible embodiments, reference is made to the foregoing. Figure 2 It can be seen that the aforementioned second driving electrode layer 23 may include: Third sub-electrode layer 231, as described above Figure 5 Image (a) shows a top view of the third sub-electrode layer 231, see reference. Figure 5As can be seen from (a) in the figure, the third sub-electrode layer 231 is planar, and a fourth lead 04 is provided at the first end of the third sub-electrode layer 231 near the left edge of the lens 200, and a fifth lead 05 is provided at the second end of the third sub-electrode layer 231 near the right edge of the lens 200. The fourth lead 04 and the fifth lead 05 are used to connect to voltage sources with different potentials. The second insulating layer 233 covers the third sub-electrode layer 231 to provide electrical isolation. Fourth sub-electrode layer 232, as described above Figure 5 Image (b) shows a top view of the fourth sub-electrode layer 232, which covers the second insulating layer 233. The fourth sub-electrode layer 232 includes a plurality of parallelly arranged third electrode units 2321. The third electrode units 2321 are strip-shaped, and their extending direction is perpendicular to the first direction. (Refer to the above...) Figure 2 As shown, each of the above-mentioned third electrode units 2321 can be electrically connected to different positions of the third sub-electrode layer 231 through via 07 (which is opened in the second insulating layer 233).

[0083] The aforementioned third sub-electrode layer 231 is planar, and its overall shape is similar to that of a planar thin-film resistor. The third sub-electrode layer 231 itself has a certain planar resistance. When the fourth lead 04 and the fifth lead 05 are connected to voltage sources with different potentials, current flows in the third sub-electrode layer 231 along the first direction, forming a continuous voltage drop on the third sub-electrode layer 231. Therefore, the potentials at different positions on the third sub-electrode layer 231 along the first direction are different.

[0084] Each third electrode unit 2321 in the aforementioned fourth sub-electrode layer 232 is electrically connected to different positions of the third sub-electrode layer 231 along the first or second direction through a via 07 formed on the second insulating layer 233, thereby leading out the potential at different positions on the third sub-electrode layer 231 to the corresponding third electrode unit 2321. Since the second common electrode layer 24 is usually a whole-surface electrode and is at a uniform potential, each third electrode unit 2321 has a different potential difference relative to the second common electrode layer 24, thereby forming a gradually changing second electric field along the first direction in the second liquid crystal layer 25.

[0085] In some possible embodiments, the width of each of the above-mentioned third electrode units 2321 can be set to 3μm to 8μm, and the spacing between adjacent third electrode units 2321 can be set to 3μm to 12μm. This size range is beneficial to ensure the accuracy of electric field control while avoiding electric field crosstalk between adjacent electrode units.

[0086] Under the action of the second electric field, the effective refractive index of the second liquid crystal layer 25 in the first direction changes accordingly, causing the outgoing light axis to be deflected at a uniform angle relative to the incident light axis, thus presenting the optical effect of a prism.

[0087] In some possible embodiments, in order to ensure a smooth transition of the pressure difference between the third electrode units 2321, and to prevent abrupt changes in the pressure difference from affecting the light control effect of the lens 200, refer to the above. Figure 2 As shown, the second driving electrode layer 23 may further include a second high-resistivity film 234, which covers a plurality of third electrode units 2321.

[0088] For specific examples regarding the material selection, resistivity range, thickness, and fabrication process of the second high-resistivity film 234, please refer to the aforementioned examples regarding the first high-resistivity film 134, which will not be repeated here.

[0089] In some possible embodiments, reference Figure 2 As shown, the third sub-electrode layer 231 can be located on the side of the second insulating layer 233 closer to the human eye, and the fourth sub-electrode layer 232 can be located on the side of the second insulating layer 233 away from the human eye. Of course, it is not excluded that the third sub-electrode layer 231 can be located on the side of the second insulating layer 233 away from the human eye, and the fourth sub-electrode layer 232 can be located on the side of the second insulating layer 233 closer to the human eye.

[0090] Based on the above technical solution, by using the planar third sub-electrode layer as a resistive voltage divider structure, different potentials can be generated on multiple third electrode units with only two leads, eliminating the need to draw leads separately for each third electrode unit. This simplifies the driving circuit structure and fabrication process. The second insulating layer achieves electrical isolation between the upper and lower electrode layers and enables electrical connection through vias, allowing the fourth sub-electrode layer to obtain the required gradient potential distribution. This, in turn, forms a gradually changing second electric field along the horizontal direction (i.e., the aforementioned first or second direction) within the liquid crystal layer, causing the lens to exhibit a prism optical effect.

[0091] Figure 6 This is a schematic diagram of another second driving electrode layer 23 proposed in the embodiments of this application.

[0092] refer to Figure 6As shown, the second driving electrode layer 23 may include a continuous zigzag electrode 2322. A fourth lead 04 is provided at the first end of the zigzag electrode 2322 near the left edge of the lens 200, and a fifth lead 05 is provided at the second end of the zigzag electrode 2322 near the right edge of the lens 200. The fourth lead 04 and the fifth lead 05 are used to connect to voltage sources with different potentials. The second driving electrode layer 23 may also include a second high-resistivity film 234, which covers the zigzag electrode 2322.

[0093] The aforementioned zigzag electrode 2322 has a continuous zigzag shape, resembling a serpentine planar resistor. The zigzag electrode 2322 itself has a certain line resistance. When the fourth lead 04 and the fifth lead 05 are connected to voltage sources with different potentials, current flows along the extension path of the zigzag electrode 2322, forming a continuous voltage drop on the zigzag electrode 2322. Therefore, the potential at different positions along the first direction on the zigzag electrode 2322 is different. The second high-resistivity film 234 covers the surface of the zigzag electrode 2322, forming a continuous resistive path between adjacent segments of the zigzag electrode 2322, thereby converting the discrete step voltage difference into a continuously changing voltage difference. Thus, the second high-resistivity film 234, in conjunction with the zigzag electrode 2322, forms a gradually changing second electric field within the second liquid crystal layer 25 along the first direction, causing the effective refractive index of the second liquid crystal layer 25 to change gradient in the first direction. This, in turn, causes the outgoing optical axis to deflect at a uniform angle relative to the incident optical axis, exhibiting a prism optical effect.

[0094] Based on the above technical solution, by using a continuous zigzag electrode in conjunction with a second high-resistivity film, a second electric field that gradually changes along the horizontal direction (i.e., the first or second direction mentioned above) can be formed in the second liquid crystal layer using only a single electrode. This is beneficial to further simplify the film structure and fabrication process of the second driving electrode layer 23, so that the lens exhibits the optical effect of a prism.

[0095] In some possible embodiments, reference Figure 2 The lens 200 shown has a first liquid crystal cell formed between the first transparent substrate 11 and the second transparent substrate 12, and a first liquid crystal layer 15 is filled in the first liquid crystal cell.

[0096] For example, the thickness of the first liquid crystal cell (i.e., the distance between the first transparent substrate 11 and the second transparent substrate 12) can be set to 3 μm to 16 μm.

[0097] In some possible embodiments, reference Figure 2 The lens 200 shown has blue phase liquid crystal molecules in the first liquid crystal layer 15 and the second liquid crystal layer 25.

[0098] Blue phase liquid crystals are liquid crystal phases with a three-dimensional periodic helical structure, typically obtained by doping nematic liquid crystals with chiral agents. Blue phase liquid crystals are optically isotropic when no electric field is applied, meaning they have a uniform refractive index distribution. When an electric field is applied, blue phase liquid crystals exhibit birefringence based on the Kerr effect, and the effective refractive index of blue phase liquid crystals increases with increasing electric field strength.

[0099] When a first electric field is applied between the first driving electrode layer 13 and the first common electrode layer 14, the blue phase liquid crystals at different locations in the first liquid crystal layer 15 exhibit different optical states due to differences in electric field intensity. To create a central converging effect equivalent to a convex lens, the pressure difference between the first driving electrode layer 13 and the first common electrode layer 14 is configured to be maximum in the central region and minimum (e.g., 0V) in the edge region of the first sub-electrode layer 131 (i.e., the location of the first lead 01) and the first common electrode layer 14 is 0V. There is no electric field here, and the blue phase liquid crystal exhibits optical isotropy with a uniform refractive index distribution of size n. iso The voltage difference between the central region of the first sub-electrode layer 131 (i.e., the location of the second lead 02) and the first common electrode layer 14 is at its maximum value (e.g., 24V). The electric field strength is at its maximum here. Under the influence of the electric field, the blue phase liquid crystal is stretched and exhibits optical anisotropy. The magnitude of the refractive index along the optical axis is: n iso +Δn.

[0100] Therefore, it can be seen that the refractive index distribution at other locations in the first liquid crystal layer 15 follows a parabolic decreasing pattern from the center to the edge, and the refractive index at a distance r from the center can be determined by the following formula (1): (1) in, Where K is the Kerr coefficient and E is the electric field strength. Where λ is the incident light wavelength, and R is the effective optical aperture radius.

[0101] To achieve the above refractive index distribution, the pressure difference between each first electrode unit 1321 in the first driving electrode layer 13 and the first common electrode layer 14 can be set according to a gradient.

[0102] For example, when the potential at the location of the second lead 02 is 24V, the potential at the location of the first lead 01 is 0V, and the potential of the first common electrode layer 14 is 0V, the voltage differences between the seven first electrode units 1321 from the inside out and the first common electrode layer 14 can be 21V, 18V, 15V, 12V, 9V, 6V, and 3V respectively. It should be noted that the above potential configuration is merely an example; any electric field distribution that results in a large voltage difference at the center and a small voltage difference at the edges is acceptable.

[0103] Accordingly, a voltage is applied between the second driving electrode layer 23 and the second common electrode layer 24, and the blue phase liquid crystal in the second liquid crystal layer 25 generates birefringence under the action of the electric field. Its effective refractive index changes with the electric field strength, thereby forming the required refractive index gradient in the second liquid crystal layer 25 in the first direction.

[0104] Figure 7 This is a schematic diagram of the voltage distribution of the second driving electrode layer 23 proposed in the embodiments of this application.

[0105] refer to Figure 7 As shown, the second driving electrode layer 23 and the second common electrode layer 24 can be driven by an AC square wave signal (e.g., a frequency of 90Hz) to avoid long-term polarization damage to the liquid crystal molecules by the DC electric field.

[0106] Taking the second driving electrode layer 23, which includes 182 third electrode units 2321, as an example, the driving signal of the second common electrode layer 24 alternates between a first potential and a second potential, and the driving signal of each third electrode unit 2321 also alternates between corresponding potentials. By configuring the potential difference between each third electrode unit 2321 and the second common electrode layer 24, the voltage difference between each third electrode unit 2321 and the second common electrode layer 24 can be made to increase sequentially from left to right.

[0107] For example, the voltage difference between the leftmost third electrode unit 2321 (denoted as electrode 0) and the second common electrode layer 24 can be set to 0V, and the voltage difference between the rightmost third electrode unit 2321 (denoted as electrode 181) and the second common electrode layer 24 can be set to 24V; the voltage difference between each third electrode unit 2321 and the second common electrode layer 24 increases sequentially from left to right, such as the voltage difference corresponding to electrode 1 being 0.133V, the voltage difference corresponding to electrode 2 being 0.265V, the voltage difference corresponding to electrode 90 being 11.934V, the voltage difference corresponding to electrode 91 being 12.066V, the voltage difference corresponding to electrode 179 being 23.735V, and the voltage difference corresponding to electrode 180 being 23.867V.

[0108] Since the voltage levels of each third electrode unit 2321 are discretely distributed, abrupt changes in liquid crystal deflection can easily occur, leading to abrupt changes in refractive index. By covering the surfaces of multiple third electrode units 2321 with a second high-resistivity film 234, the pressure difference change between adjacent third electrode units 2321 can be transformed from an abrupt change to a uniform change, thereby forming a smooth refractive index gradient in the second liquid crystal layer 25 in the first direction, and better achieving control over light deflection.

[0109] Based on the above technical solution, since blue phase liquid crystals are optically isotropic when no electric field is applied, and the refractive index modulation of blue phase liquid crystals is based on the Kerr effect, there is no need for an alignment layer fabrication process for the first liquid crystal layer using blue phase liquid crystals, nor is it necessary to configure a polarizer. This simplifies the lens fabrication process, reduces lens thickness, and improves lens transmittance.

[0110] In applications where cost control is critical, the liquid crystal molecules in the first liquid crystal layer 15 and the second liquid crystal layer 25 can also be replaced by nematic liquid crystals. Nematic liquid crystal materials have high maturity, a stable supply chain, and low cost, which helps to reduce the overall manufacturing cost of the lens 200. The following will provide a detailed description of embodiments of the lens 200 using nematic liquid crystals.

[0111] Figure 8 This is a schematic diagram of the structure of another lens 200 proposed in the embodiments of this application.

[0112] Compared to the above Figure 2 The lens 200 shown is... Figure 8 The structural difference of the lens 200 shown lies in the type of liquid crystal molecules in the liquid crystal layer, which is a nematic liquid crystal. Accordingly, the first optical module 10 in the lens 200 also includes the following film structure: The first alignment layer 16 and the second alignment layer 17 are disposed opposite to each other, and the first alignment layer 16 and the second alignment layer 17 are sandwiched between the first driving electrode layer 13 and the first common electrode layer 14, and the first liquid crystal layer 15 is sandwiched between the first alignment layer 16 and the second alignment layer 17. In addition, the second optical module 20 in the lens 200 also includes the following film structure: The third alignment layer 18 and the fourth alignment layer 19 are disposed opposite to each other, sandwiched between the second driving electrode layer 23 and the second common electrode layer 24, and the second liquid crystal layer 25 is sandwiched between the third alignment layer 18 and the fourth alignment layer 19.

[0113] In addition, it also includes a polarizer 40, which is located on the side of the first optical module 10 away from the second optical module 20.

[0114] In some possible embodiments, the first orientation layer 16, the second orientation layer 17, the third orientation layer 18 and the fourth orientation layer 19 described above can typically be polyimide (PI) alignment films.

[0115] During preparation, the PI solution can be first coated onto the surface of the corresponding substrate, and then cured to form an alignment film layer.

[0116] In some possible embodiments, the above-mentioned alignment layer can also be made of photoalignment material, and alignment can be achieved by polarized ultraviolet light irradiation. The photoalignment process can avoid the static electricity and dust problems caused by tribo-alignment.

[0117] In some possible embodiments, the polarizer 40 can typically be an iodine-based polarizer or a dye-based polarizer. The transmission axis of the polarizer 40 is aligned with the initial orientation of the liquid crystal molecules in the first liquid crystal layer 15, for example, at 45 degrees or -45 degrees relative to the horizontal direction, so that the incident light becomes linearly polarized light after passing through the polarizer 40 and interacts efficiently with the liquid crystal molecules.

[0118] In the absence of an electric field, the liquid crystal molecules of the aforementioned nematic liquid crystal are regularly aligned in a specific direction under the influence of the first alignment layer 16 and the second alignment layer 17. When incident light passes through the polarizer 40, it becomes linearly polarized light with the vibration direction consistent with the initial alignment of the liquid crystal molecules. When a first electric field is applied between the first driving electrode layer 13 and the first common electrode layer 14, the liquid crystal molecules in the first liquid crystal layer 15 are deflected under the influence of the first electric field, and their effective refractive index changes with the electric field strength, thereby forming the required refractive index gradient within the first liquid crystal layer 15, exhibiting the optical effect of a convex lens. Similarly, the liquid crystal molecules in the second liquid crystal layer 25 are deflected under the influence of the second electric field, forming the required refractive index gradient within the second liquid crystal layer 25, exhibiting the optical effect of a prism.

[0119] Because nematic liquid crystal materials are highly mature, have a stable supply chain, and are relatively inexpensive, they help reduce the overall manufacturing cost of the lens 200. Furthermore, the polarizer 40 is positioned on the side of the first optical module 10 furthest from the second optical module 20, i.e., the outermost side of the lens 200. This allows the incident light to be modulated into linearly polarized light before entering the first optical module 10. This linearly polarized light then passes sequentially through the first optical module 10 and the second optical module 20, where it is respectively endowed with the optical effects of a convex lens and a prism, which helps ensure the optical alignment accuracy of the two optical modules.

[0120] Figure 9 This is a schematic diagram of the structure of another lens 200 proposed in the embodiments of this application.

[0121] Compared to the above Figure 2 The lens 200 shown is... Figure 9 The structural difference of the lens 200 shown lies in the type of liquid crystal molecules in the liquid crystal layer; it uses nematic liquid crystal, but compared to... Figure 8 The lens 200 shown is also different. Figure 9 The lens 200 shown eliminates the polarizer structure, and correspondingly, additional designs are made for the first liquid crystal layer 15, the second liquid crystal layer 25, and the alignment film: refer to Figure 9As shown, the first liquid crystal layer 15 includes a first sub-liquid crystal layer 151 and a second sub-liquid crystal layer 152 stacked together; the second liquid crystal layer 25 includes a third sub-liquid crystal layer 251 and a fourth sub-liquid crystal layer 252 stacked together; wherein the orientation of the liquid crystal in the first sub-liquid crystal layer 151 is orthogonal to the orientation of the liquid crystal in the second sub-liquid crystal layer 152, and the orientation of the liquid crystal in the third sub-liquid crystal layer 251 is orthogonal to the orientation of the liquid crystal in the fourth sub-liquid crystal layer 252.

[0122] Accordingly, the first optical module 10 further includes a first intermediate alignment layer 171, which is sandwiched between the first sub-liquid crystal layer 151 and the second sub-liquid crystal layer 152. The second optical module 20 further includes a second intermediate alignment layer 172, which is sandwiched between the third sub-liquid crystal layer 251 and the fourth sub-liquid crystal layer 252.

[0123] The optical modulation of nematic liquid crystals depends on the polarization state of the incident light. Single-layer liquid crystal structures typically require the use of polarizers to ensure that the incident light is linearly polarized before entering the liquid crystal layer. In the aforementioned... Figure 9 In the lens 200 shown, the first liquid crystal layer 15 is composed of a first sub-liquid crystal layer 151 and a second sub-liquid crystal layer 152 stacked together, with the initial orientation directions of the nematic liquid crystals in the two layers being orthogonal to each other; the second liquid crystal layer 25 is composed of a third sub-liquid crystal layer 251 and a fourth sub-liquid crystal layer 252 stacked together, with the initial orientation directions of the nematic liquid crystals in the two layers being orthogonal to each other. Therefore, when unpolarized natural light is incident, the light vector component in any polarization direction can be effectively modulated in the two orthogonally arranged sub-liquid crystal layers. The overall optical effect of the two sub-liquid crystal layers stacked together is similar to that of a single liquid crystal layer combined with a polarizer, thus eliminating the need for a polarizer and improving the light transmittance and brightness of the lens 200.

[0124] In some possible embodiments, the first intermediate alignment layer 171 is used to define the initial alignment direction of liquid crystal molecules in the first sub-liquid crystal layer 151 and the second sub-liquid crystal layer 152. Since the first sub-liquid crystal layer 151 and the second sub-liquid crystal layer 152 have different alignment directions, the first intermediate alignment layer 171 can be a single-layer structure with different alignment directions on its two side surfaces, one side facing the first sub-liquid crystal layer 151 and the other side facing the second sub-liquid crystal layer 152, to provide the required alignment definition for these two sub-liquid crystal layers respectively. Similarly, the second intermediate alignment layer 172 can also be a single-layer structure with different alignment directions on its two side surfaces, to define the initial alignment direction of liquid crystal molecules in the third sub-liquid crystal layer 251 and the fourth sub-liquid crystal layer 252.

[0125] In some possible embodiments, the first intermediate alignment layer 171 and the second intermediate alignment layer 172 may also adopt a double-layer structure, that is, it is formed by two independent sub-alignment layers stacked together, each sub-alignment layer corresponding to a sub-liquid crystal layer, and the two sub-alignment layers having mutually orthogonal alignment directions.

[0126] In some possible embodiments, the first intermediate alignment layer 171 and the second intermediate alignment layer 172 may be made of PI alignment film or photoalignment material. For specific material selection and preparation process, please refer to the aforementioned embodiments regarding the first alignment layer 16, which will not be repeated here.

[0127] The foregoing embodiments described various optical structures and driving methods for the lens 200, including different schemes such as blue phase liquid crystal or nematic liquid crystal. The lens 200 can be fitted into eyeglasses for user wear; the structure of these eyeglasses will be described below.

[0128] Figure 10 This is a schematic diagram of the structure of a pair of glasses 300 according to an embodiment of this application. The dashed lines represent the electrical connections between multiple functional units within the glasses 300.

[0129] refer to Figure 10 As shown, the glasses 300 may include: The eyeglass frame includes a frame 311 and temples 312; and any of the lenses 200 proposed in the embodiments of this application, the shape of which is adapted to the frame 311.

[0130] In some possible embodiments, the aforementioned frames can typically be made of materials such as titanium alloy, plastic titanium, or sheet metal, which can reduce overall weight and improve wearing comfort while ensuring structural strength.

[0131] Furthermore, based on the foregoing embodiments regarding lens 200, it is known that lens 200 requires power; therefore, the aforementioned eyeglasses 300 may also include: The power supply unit 320 is connected to the leads in the lens 200 to output a voltage signal whose voltage value is related to the diopter of the lens 200.

[0132] For example, the power supply unit 320 may include a lithium battery or a flexible battery, which may be disposed inside the temple 312.

[0133] For example, the power supply unit 320 can be electrically connected to the first lead 01, the second lead 02, the fourth lead 04 and the fifth lead 05 in the lens 200 via a flexible circuit board, so as to provide independent driving voltages for the first driving electrode layer 13 and the second driving electrode layer 23 respectively.

[0134] For example, the voltage value of the voltage signal output by the power supply unit 320 can be set according to the required optical power and prism power of the lens 200, for example, outputting a voltage signal in the range of 0V to 30V.

[0135] Based on the above technical solution, by introducing a power supply unit into the glasses, the power supply unit is electrically connected to the electrode layer inside the lens 200 through a lead wire, providing the required electrical energy for the electric field driving of the liquid crystal layer, so that the lens can present the corresponding convex lens and prism optical effects based on the variable electric field.

[0136] Furthermore, since the voltage signal output by the power supply unit 320 is adjustable, the aforementioned glasses 300 may also include: An adjustment element 330 is disposed on the frame and electrically connected to the power supply unit 320. The adjustment element 330 is configured to adjust the voltage value of the voltage signal output by the power supply unit 320.

[0137] For example, the aforementioned adjustment element 330 can be a knob, button, or touch-sensitive element, and can be located on the outer surface of the temple 312 to facilitate manual operation by the user when wearing the glasses.

[0138] For example, the aforementioned adjustment element 330 can be configured to switch between a lifestyle lens mode and a reading / writing lens mode. The lifestyle lens mode corresponds to a lower output voltage value, which keeps the optical power and prism power of the lens 200 at a lower level, suitable for telephoto scenarios. The reading / writing lens mode corresponds to a higher output voltage value, which keeps the optical power and prism power of the lens 200 at a higher level, suitable for near vision scenarios, so as to reduce the accommodation and convergence of the human eye when viewing near objects.

[0139] Based on the above technical solution, users can manually switch between different usage modes through the adjustment mechanism, so that the same pair of glasses can adapt to different visual scenarios such as seeing far and near, without the need to equip and frequently change daily glasses and reading glasses.

[0140] In some possible embodiments, considering that the user's myopia gradually decreases with the assistance of the glasses 300, or in order to enable the same pair of glasses to adapt to users with different myopia levels, the glasses 300 may further include: The data interface 340 is disposed on the eyeglass frame and configured to receive the user's refraction data; the control unit 350 is electrically connected to the data interface 340 and the power supply unit 320 respectively, and is configured to control the voltage value of the voltage signal output by the power supply unit 320 according to the refraction data.

[0141] For example, the data interface 340 mentioned above can be a universal serial bus (USB) interface, a Bluetooth module, or a near field communication (NFC) module, etc., and can be set on the temple 312 to receive the user's refraction data transmitted from an external device. The refraction data mentioned above can include personalized parameters such as the user's required myopia degree, astigmatism degree, prism power, and pupillary distance.

[0142] For example, the control unit 350 described above can be a microcontroller or a dedicated driver chip, and can be located inside the temple 312. Based on the refraction data received from the data interface 340, the control unit 350 calculates the voltage value corresponding to the user's personalized refractive correction needs, and controls the power supply unit 320 to output the corresponding voltage signal, thereby automatically adjusting the optical power and prism power of the lens 200 to values ​​matching the refraction data.

[0143] Based on the above technical solution, by introducing a data interface and control unit into the glasses, the glasses can automatically set the lens power based on the user's optometry data, achieving personalized and precise refractive correction without the need for manual adjustment by the user.

[0144] In some possible embodiments, to further enhance the intelligent features of the glasses 300, the glasses 300 may further include: A sensing unit 360 is disposed on the frame and electrically connected to a control unit 350. The sensing unit 360 is configured to detect the viewing distance of the human eye. The control unit 350 is also configured to control the voltage value of the voltage signal output by the power supply unit 320 according to the viewing distance of the human eye.

[0145] For example, the aforementioned sensing unit 360 includes a distance sensor, an eye-tracking sensor, and a gyroscope.

[0146] The aforementioned distance sensor can be located inside the frame 3111 to detect the physical distance between the human eye and the viewing target; the aforementioned eye-tracking sensor can be located near the lens 200 on the frame 3111 to detect the gaze direction of the eyeball and the convergence angle of the eyes; the aforementioned gyroscope can be located inside the temple 312 to detect the head posture and pitch angle.

[0147] For example, the aforementioned control unit 350 integrates multi-dimensional data from the distance sensor, eye-tracking sensor, and gyroscope to make a judgment: when the distance sensor detects that the viewing distance is close, and the eye-tracking sensor detects that the eyes are converging inward and the gyroscope detects that the head is in a downward posture, the control unit 350 determines that the user is in a reading / writing scenario and controls the power supply unit 320 to output a higher voltage, so that the lens 200 superimposes the optical effects of a convex lens and a prism; when the distance sensor detects that the viewing distance is far, or the eye-tracking sensor detects that the eyes are in a divergent, level-looking state and the gyroscope detects that the head is in a horizontal posture, the control unit 350 determines that the user is in a telephoto scenario and controls the power supply unit 320 to output a lower voltage, so that the lens 200 returns to its basic refractive state.

[0148] Based on the above technical solutions, through the collaborative work of multiple sensors, the glasses can more accurately identify real-world eye usage scenarios, avoid misjudgments caused by a single distance sensor, and achieve a more natural, accurate, and seamless fit.

[0149] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0150] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0151] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A lens, characterized by, include: A first optical module and a second optical module are configured by optical adhesive stacking; The first optical module includes: A first transparent substrate and a second transparent substrate are disposed opposite to each other, with the second transparent substrate in contact with the optical adhesive; A first driving electrode layer and a first common electrode layer are disposed opposite to each other, and the first driving electrode layer and the first common electrode layer are sandwiched between the first transparent substrate and the second transparent substrate; A first liquid crystal layer is sandwiched between the first driving electrode layer and the first common electrode layer; The second optical module includes: A third transparent substrate and a fourth transparent substrate are disposed opposite to each other, wherein the third transparent substrate is in contact with the optical adhesive; A second driving electrode layer and a second common electrode layer are disposed opposite to each other, and the second driving electrode layer and the second common electrode layer are sandwiched between the third transparent substrate and the fourth transparent substrate; The second liquid crystal layer is sandwiched between the second driving electrode layer and the second common electrode layer; The first liquid crystal layer is configured to exhibit a convex lens optical effect based on a first electric field between the first driving electrode layer and the first common electrode layer, wherein the intensity of the first electric field is adjustable; the second liquid crystal layer is configured to exhibit a prism optical effect based on a second electric field between the second driving electrode layer and the second common electrode layer, wherein the intensity of the second electric field is adjustable.

2. The lens according to claim 1, characterized in that, The first electric field gradually decreases along the radial direction of the lens; When the lens is a left spectacle lens, the second electric field gradually increases along the first direction of the lens; When the lens is a right spectacle lens, the second electric field gradually increases along the second direction of the lens; The first direction is from the left edge to the right edge of the lens, and the second direction is opposite to the first direction.

3. The lens according to claim 2, characterized in that, The first driving electrode layer includes: The first sub-electrode layer is concentrically coiled, with a first lead at the edge and a second lead at the center. The first lead and the second lead are used to connect to voltage sources with different potentials. A first insulating layer, the first insulating layer covering the first sub-electrode layer; The second sub-electrode layer covers the first insulating layer and includes a plurality of concentrically arranged first electrode units, each of which is electrically connected to a different position of the first sub-electrode layer through a via.

4. The lens according to claim 3, characterized in that, The first driving electrode layer further includes: A first high-resistivity film covers the plurality of first electrode units.

5. The lens according to claim 2, characterized in that, The first driving electrode layer includes a plurality of concentrically arranged second electrode units, each of which is connected to an independent third lead. The plurality of third leads are used to connect to voltage sources at different potentials so that the first electric field drives the first liquid crystal layer to exhibit the optical effect of a Fresnel lens.

6. The lens according to any one of claims 2 to 5, characterized in that, The second driving electrode layer includes: The third sub-electrode layer is planar, and a fourth lead is provided at the first end of the third sub-electrode layer near the left edge of the lens, and a fifth lead is provided at the second end of the third sub-electrode layer near the right edge of the lens. The fourth lead and the fifth lead are used to connect to voltage sources with different potentials. A second insulating layer covers the third sub-electrode layer; A fourth sub-electrode layer covers the second insulating layer. The fourth sub-electrode layer includes a plurality of third electrode units arranged in parallel. The third electrode units are strip-shaped and their extension direction is perpendicular to the first direction. Each third electrode unit is electrically connected to a different position of the third sub-electrode layer through a via.

7. The lens according to claim 6, characterized in that, The second driving electrode layer includes: A second high-resistivity film covers the plurality of third electrode units.

8. The lens according to any one of claims 2 to 5, characterized in that, The second driving electrode layer includes: A continuous zigzag electrode, wherein a fourth lead is provided at the first end of the zigzag electrode near the left edge of the lens, and a fifth lead is provided at the second end of the zigzag electrode near the right edge of the lens, and the fourth lead and the fifth lead are used to connect to voltage sources of different potentials; A second high-resistivity film covers the zigzag electrode.

9. The lens according to any one of claims 1 to 8, characterized in that, The liquid crystal molecules in the first liquid crystal layer and the second liquid crystal layer are blue phase liquid crystals.

10. The lens according to any one of claims 1 to 8, characterized in that, The liquid crystal molecules in the first liquid crystal layer and the second liquid crystal layer are nematic liquid crystals. The first optical module also includes: A first alignment layer and a second alignment layer are disposed opposite to each other, the first alignment layer and the second alignment layer are sandwiched between the first driving electrode layer and the first common electrode layer, and the first liquid crystal layer is sandwiched between the first alignment layer and the second alignment layer; The second optical module also includes: A third alignment layer and a fourth alignment layer are disposed opposite to each other, the third alignment layer and the fourth alignment layer are sandwiched between the second driving electrode layer and the second common electrode layer, and the second liquid crystal layer is sandwiched between the third alignment layer and the fourth alignment layer.

11. The lens according to claim 10, characterized in that, The first liquid crystal layer includes a first sub-liquid crystal layer and a second sub-liquid crystal layer stacked together; The second liquid crystal layer includes a third sub-liquid crystal layer and a fourth sub-liquid crystal layer stacked together; The first optical module further includes a first intermediate alignment layer, which is sandwiched between the first sub-liquid crystal layer and the second sub-liquid crystal layer; The second optical module further includes a second intermediate alignment layer, which is sandwiched between the third sub-liquid crystal layer and the fourth sub-liquid crystal layer; The orientation of the liquid crystal in the first sub-liquid crystal layer is orthogonal to the orientation of the liquid crystal in the second sub-liquid crystal layer, and the orientation of the liquid crystal in the third sub-liquid crystal layer is orthogonal to the orientation of the liquid crystal in the fourth sub-liquid crystal layer.

12. The lens according to claim 10, characterized in that, The lens also includes: A polarizer is located on the side of the first optical module away from the second optical module.

13. A pair of eyeglasses, characterized in that, include: Eyeglass frame, the eyeglass frame including a frame and temples; And a lens as claimed in any one of claims 1 to 12, wherein the shape of the lens is adapted to the frame.

14. The eyeglasses according to claim 13, characterized in that, The glasses also include: A power supply unit is connected to the leads in the lens to output a voltage signal, the voltage value of which is related to the power of the lens.

15. The eyeglasses according to claim 14, characterized in that, The glasses also include: An adjustment element is disposed on the eyeglass frame and electrically connected to the power supply unit, and the adjustment element is configured to adjust the voltage value of the voltage signal.

16. The eyeglasses according to claim 14 or 15, characterized in that, The glasses also include: A data interface is disposed on the frame and configured to receive the user's refraction data; A control unit is electrically connected to the data interface and the power supply unit, respectively. The control unit is configured to control the voltage value of the voltage signal output by the power supply unit according to the refraction data.

17. The eyeglasses according to claim 16, characterized in that, The glasses also include: A sensing unit is disposed on the frame and electrically connected to the control unit. The sensing unit is configured to detect the viewing distance of the human eye. The control unit is further configured to control the voltage value of the voltage signal output by the power supply unit according to the viewing distance of the human eye.

18. The eyeglasses according to claim 17, characterized in that, The sensing unit includes a gyroscope, an eye-tracking sensor, and a distance sensor.

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