Lens module, intelligent wearable device and working method of intelligent wearable device

Abstract

The embodiment of the invention provides a lens module, intelligent wearable equipment and a working method thereof, relates to the technical field of display, and is used for inhibiting the development of ametropia. The lens module comprises a first electrode, a liquid crystal layer and a second electrode which are sequentially stacked, the lens module comprises a plurality of refraction units, and the lens module located in the refraction units has a first state and a second state. When the lens module located in the refraction unit is in a first state, a first angle is formed between at least part of liquid crystal molecules of the liquid crystal layer located in the refraction unit and the plane where the lens module is located, and the lens module located in the refraction unit has first refraction power. When the lens module located in the refraction unit is in a second state, at least part of liquid crystal molecules of the liquid crystal layer located in the refraction unit and the plane where the lens module is located form a second angle, and the lens module located in the refraction unit has second refraction power; wherein the first angle is different from the second angle, and the first refractive power is different from the second refractive power.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a lens module, a smart wearable device, and a method for operating the same. Background Technology

[0002] When the human eye sees an object, light emitted from the object enters the eye and is refracted through the cornea, pupil, lens, and vitreous humor, eventually forming an image on the retina. When the eye has refractive errors, such as nearsightedness or farsightedness, the image of the object will not converge on the retina. Depending on the degree of refractive error, lenses with different refractive powers are needed for correction.

[0003] However, wearing corrective lenses for extended periods can easily cause visual fatigue and reduce comfort. Summary of the Invention

[0004] This application provides a lens module, a smart wearable device, and a method for operating the same, for suppressing the development of refractive errors.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A first aspect of this application provides a smart wearable device, including: a frame, a lens module, an eye-tracking module, a driving module, and a power module. The frame includes a pair of temples and a frame disposed between the temples. The lens module is disposed within the frame, and the eye-tracking module, driving module, and power module are disposed on the frame. The lens module includes a first electrode, a liquid crystal layer, and a second electrode stacked sequentially. The lens module includes multiple refractive units, and the lens module within each refractive unit has a first state and a second state. When the lens module is in the first state, at least a portion of the liquid crystal molecules in the liquid crystal layer within the refractive unit form a first angle with the plane of the lens module, and the lens module has a first refractive power. When the lens module is in the second state, at least a portion of the liquid crystal molecules in the liquid crystal layer within the refractive unit form a second angle with the plane of the lens module, and the lens module has a second refractive power. The first angle and the second angle are different, and the first refractive power and the second refractive power are different. The eye-tracking module monitors the position of the eye. The drive module controls the lens module within the refractive unit to be in either a first or second state based on the eye position. The power module supplies power to the lens module, eye-tracking module, and drive module.

[0007] The smart wearable device provided in this application embodiment includes an eye-tracking module that can track the wearer's eye position, and a driving module that can control the lens module within the refractive unit to be in a first or second state based on the eye position. A power module can apply voltage to the lens module to change the refractive unit's state between the first and second states. The power module also provides power to the eye-tracking module and the driving module. In this application embodiment, the refractive unit in the first state constitutes the visual area of ​​the lens module, and the refractive unit in the second state constitutes the defocus area of ​​the lens module. The first and second states of the lens module within the refractive unit can be dynamically adjusted. Therefore, the visual area and defocus area of ​​the lens module can be dynamically adjusted according to the wearer's eye usage, so that the visual area of ​​the lens module can remain stably centered on the wearer's pupil, and the defocus area can continuously correct the eye's focus, achieving more effective suppression of refractive error development, while also improving wearing comfort and compliance.

[0008] Furthermore, the smart wearable device provided in this application embodiment can adjust the shape of the visual area and the defocus area according to the actual situation of the wearer, thereby more effectively suppressing the development of refractive errors.

[0009] In the solution provided in this application embodiment, the lens module of the smart wearable device controls the refractive power of the refractive unit by whether or not a voltage is applied to the liquid crystal layer in the refractive unit, which has the advantages of high flexibility and small size.

[0010] In one possible implementation, the smart wearable device further includes a processor disposed on the eyeglass frame. The processor generates a defocus scheme and generates a drive signal based on the defocus scheme. The defocus scheme includes at least one number and position of refractive units in a first state and at least one number and position of refractive units in a second state. The drive module controls the lens modules within the refractive units to be in either the first or second state according to the drive signal. In this way, the processor can switch between the first and second states of the lens modules within the refractive units to adjust the shape and position of the viewing area and the defocus area.

[0011] In one possible implementation, the smart wearable device also establishes a communication connection with an electronic device. The electronic device sends the defocusing scheme to the processor of the smart wearable device, and the processor generates a drive signal based on the received defocusing scheme. The drive module controls the lens module within the refractive unit to be in a first state or a second state based on the drive signal. In this way, the defocusing scheme can be pushed to the smart wearable device via the electronic device to adjust the shape and position of the viewing area and the defocused area.

[0012] In one possible implementation, the smart wearable device includes two eye-tracking modules, which are respectively positioned on opposite sides of the frame. This allows for adjustment of the relative positions of the viewing area and the defocus area to accommodate different eye viewing angles.

[0013] In one possible implementation, light is refracted by the refractive unit in its first state before entering the eye and converging on the retina. In this way, the lens module within the refractive unit, in its first state, serves as the visual area of ​​the lens module, enabling clear vision.

[0014] A second aspect of this application provides a lens module, including a first electrode, a liquid crystal layer, and a second electrode stacked sequentially. The lens module includes multiple refractive units, and the lens module located within the refractive units has a first state and a second state. When the lens module is in the first state, at least a portion of the liquid crystal molecules in the liquid crystal layer within the refractive unit form a first angle with the plane of the lens module, and the lens module has a first refractive power. When the lens module is in the second state, at least a portion of the liquid crystal molecules in the liquid crystal layer within the refractive unit form a second angle with the plane of the lens module, and the lens module has a second refractive power; wherein the first angle and the second angle are different, and the first refractive power and the second refractive power are different.

[0015] The lens module provided in the second aspect of the embodiments of this application, when applied to any of the smart wearable devices of the first aspect, has the same beneficial effects as the smart wearable device, and will not be repeated here.

[0016] In one possible implementation, the lens module further includes a microstructure array; the microstructure array is disposed on the side of the liquid crystal layer away from the second electrode; the microstructure array includes multiple spaced microstructures; the microstructures are located within the refractive unit; the second electrode includes multiple sub-electrodes. When the lens module located within the refractive unit is in a first state, the liquid crystal layer within the refractive unit has a first refractive index, and the refractive index of the microstructure has a first difference from the first refractive index; when the lens module located within the refractive unit is in a second state, the liquid crystal layer within the refractive unit has a second refractive index, and the refractive index of the microstructure has a second difference from the second refractive index; the first difference is less than the second difference. This provides an implementation method where the lens module located within the refractive unit is in both a first and a second state. Furthermore, the second electrode, disposed opposite to the microstructure array, is planar, making it easy to pattern and form multiple sub-electrodes.

[0017] In one possible implementation, the microstructure array is disposed on the side of the first electrode away from the liquid crystal layer. This way, when a voltage is applied to the first and second electrodes, the microstructure array, being disposed on the side of the first electrode away from the liquid crystal layer, can prevent uneven voltage drop across the liquid crystal layer caused by voltage division due to the microstructure array.

[0018] In one possible implementation, a microstructure array is disposed on the side of the first electrode near the liquid crystal layer, and the second electrode includes multiple sub-electrodes. This provides an embodiment of a lens module. In this way, the second electrode, disposed opposite the microstructure array, is planar, making it easy to pattern and form multiple sub-electrodes.

[0019] In one possible implementation, the refractive index of the microstructure can be equal to, similar to, or close to the first refractive index. In this way, light does not refract when transmitted through the lens module in the first state.

[0020] In one possible implementation, the first refractive power is zero, and the second refractive power is not zero. In this way, when the lens module located within the refractive unit is in the first state, it can serve as the visual area of ​​the lens module, and when the lens module located within the refractive unit is in the second state, it can serve as the defocus area of ​​the lens module.

[0021] In one possible implementation, the microstructure has a convex surface near the liquid crystal layer. When the lens module within the refractive unit is in a first state, there is no voltage difference between the first and second electrodes, the first angle is zero, and the first refractive power is zero. When the lens module within the refractive unit is in a second state, there is a voltage difference between the first and second electrodes, the second angle is not zero, and the second refractive power is greater than zero. This provides an implementation method for the lens module within the refractive unit to be in both a first and second state.

[0022] In one possible implementation, the microstructure has a concave surface near the liquid crystal layer. When the lens module within the refractive unit is in a first state, there is a voltage difference between the first and second electrodes, the first angle is not zero, and the first refractive power is zero. When the lens module within the refractive unit is in a second state, there is no voltage difference between the first and second electrodes, the second angle is zero, and the second refractive power is greater than zero. This provides an implementation method for the lens module within the refractive unit to be in both a first and second state.

[0023] In one possible implementation, the microstructure has a convex surface near the liquid crystal layer. When the lens module within the refractive unit is in a first state, there is a voltage difference between the first and second electrodes, the first angle is not zero, and the first refractive power is zero. When the lens module within the refractive unit is in a second state, there is no voltage difference between the first and second electrodes, the second angle is zero, and the second refractive power is less than zero. This provides an implementation method for the lens module within the refractive unit to be in both a first and second state.

[0024] In one possible implementation, the microstructure has a concave surface near the liquid crystal layer. When the lens module within the refractive unit is in a first state, there is no voltage difference between the first and second electrodes, the first angle is zero, and the first refractive power is zero. When the lens module within the refractive unit is in a second state, there is a voltage difference between the first and second electrodes, the second angle is not zero, and the second refractive power is less than zero. This provides an implementation method for the lens module within the refractive unit to be in both a first and second state.

[0025] In one possible implementation, the first electrode includes multiple spaced sub-electrodes. When the lens module within the refractive unit is in a first state, there is no voltage difference between the first and second electrodes, and the first angle is zero. When the lens module within the refractive unit is in a second state, there is a voltage difference between the first and second electrodes, and a portion of the liquid crystal molecules corresponding to the sub-electrodes have a second angle with the plane where the lens module is located. This provides an implementation method for the lens module within the refractive unit to be in both a first and a second state.

[0026] In one possible implementation, the liquid crystal layer includes a cholesteric liquid crystal layer or a nematic liquid crystal layer. This provides an implementation method for a lens module.

[0027] In one possible implementation, the lens module further includes a corrective lens; the corrective lens is disposed on the side of the first electrode or the second electrode away from the liquid crystal layer. This provides one implementation of a lens module.

[0028] A third aspect of this application provides a method for operating a smart wearable device. The smart wearable device includes: a lens module comprising multiple refractive units; when the refractive units are in a first state, the lens module located within the refractive units has a first refractive power; when the refractive units are in a second state, the lens module located within the refractive units has a second refractive power; the first refractive power and the second refractive power are different; an eye-tracking module; a driving module; and a processor. The method for operating the smart wearable device includes: the eye-tracking module monitoring the position of the eyeball; the processor generating a defocus region distribution scheme and generating a driving signal according to the defocus region distribution scheme; the defocus region distribution scheme including at least one of the number and position of refractive units in the first state and at least one of the number and position of refractive units in the second state; and the driving module controlling the lens module within the refractive units to be in the first state or the second state according to the driving signal.

[0029] In one possible implementation, the smart wearable device establishes a communication connection with an electronic device, which sends a defocusing scheme to the processor of the smart wearable device. The defocusing scheme includes at least one number and position of refractive units in a first state, and at least one number and position of refractive units in a second state. The processor generates a drive signal based on the received defocusing scheme. The drive module controls the lens modules within the refractive units to be in either the first or second state based on the drive signal. In this way, the defocusing scheme can be pushed from the electronic device to the smart wearable device to adjust the shape and position of the viewing area and the defocused area.

[0030] The working method of the smart wearable device provided in the third aspect of the embodiments of this application, when applied to any of the smart wearable devices in the first aspect, has the same beneficial effects as the smart wearable device, and will not be repeated here. Attached Figure Description

[0031] Figure 1 An optical path diagram for myopia correction provided in this application embodiment;

[0032] Figure 2A This is a schematic diagram of the structure of a lens module provided in an embodiment of this application;

[0033] Figure 2B This is a schematic diagram of another lens module provided in an embodiment of this application;

[0034] Figure 2C An optical path diagram for delaying the progression of myopia is provided in the embodiments of this application;

[0035] Figure 3 This is a schematic diagram of the structure of a smart wearable device provided in an embodiment of this application;

[0036] Figure 4A This is a schematic diagram of the structure of another smart wearable device provided in an embodiment of this application;

[0037] Figure 4B This is a schematic diagram of the structure of another smart wearable device provided in an embodiment of this application;

[0038] Figure 5 This is a schematic diagram of the structure of a lens module provided in an embodiment of this application;

[0039] Figure 6 This is a schematic diagram of the structure of another smart wearable device provided in an embodiment of this application;

[0040] Figure 7A This is a schematic diagram of another lens module provided in an embodiment of this application;

[0041] Figure 7B This is a schematic diagram of the structure of another lens module provided in an embodiment of this application;

[0042] Figure 8A This is a schematic diagram of the structure of another lens module provided in an embodiment of this application;

[0043] Figure 8B This is a schematic diagram of the structure of another lens module provided in an embodiment of this application;

[0044] Figure 9A This is a schematic diagram of the structure of another lens module provided in an embodiment of this application;

[0045] Figure 9B This is a schematic diagram of the structure of another lens module provided in an embodiment of this application;

[0046] Figure 10A This is a schematic diagram of the structure of another lens module provided in an embodiment of this application;

[0047] Figure 10B This is a schematic diagram of the structure of another lens module provided in an embodiment of this application;

[0048] Figure 11A This is a schematic diagram of the structure of another lens module provided in an embodiment of this application;

[0049] Figure 11B for Figure 11A A sectional view along the A1A2 direction;

[0050] Figure 12A A schematic diagram illustrating the state change of a lens module provided in an embodiment of this application;

[0051] Figure 12B A schematic diagram illustrating the state change of another lens module provided in an embodiment of this application;

[0052] Figure 12C A schematic diagram illustrating the state change of another lens module provided in an embodiment of this application;

[0053] Figure 12D A schematic diagram illustrating the state change of another lens module provided in an embodiment of this application;

[0054] Figure 13 A flowchart illustrating the working method of a smart wearable device provided in an embodiment of this application;

[0055] Figure 14 This is a flowchart illustrating another method of operating a smart wearable device provided in an embodiment of this application.

[0056] Figure Labels

[0057] 10-Smart wearable device; 100-Eyeglass frame; 110-Eyeglass frame; 120-Temple; 121-First temple; 122-Second temple; 200-Eye tracking module; 300-Lens module; 300a-Viewing area; 300b-Defocus area; 30-Refractive unit; 310-First electrode; 311-Sub-electrode; 320-Second electrode; 330-Liquid crystal layer; 331-Liquid crystal molecule; 340-Microstructure array; 341-Microstructure; 301-Liquid crystal lens; 302-Corrective lens; 400-Driver module; 500-Processor; 600-Power module. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0059] Hereinafter, the terms "second," "first," etc., are used for descriptive convenience only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "second," "first," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0060] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" may be defined relative to the orientation in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms can be relative concepts, used for relative description and clarification, and can change accordingly based on the orientation of the components in the accompanying drawings.

[0061] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, the term "coupled connection" can be a direct electrical connection or an indirect electrical connection through an intermediate medium. The term "contact" can be direct contact or indirect contact through an intermediate medium.

[0062] In this embodiment of the application, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0063] Normally, when a person sees an object, the light emitted by the object enters the eye, is refracted by the cornea, pupil, lens, and vitreous humor, and finally forms an image on the retina. When the eye is nearsighted or farsighted, the image of the object will not converge on the retina.

[0064] For example, nearsightedness is characterized by the eye focusing distant objects in front of the retina. Farsightedness is characterized by the eye focusing distant objects behind the retina. This results in blurred vision and requires the use of concave lenses to correct nearsightedness (e.g.,...). Figure 1 (As shown), or in combination with a convex lens to correct farsightedness, so that the image is focused on the retina. Different degrees of myopia or farsightedness require lenses with different refractive powers for correction. Refractive power is the reciprocal of the lens's focal length and is used to indicate the degree of refraction of light. For example, positive refractive power is used for convex lenses, and negative refractive power is used for concave lenses.

[0065] To inhibit the progression of refractive errors, a lens module for corrective eyeglasses is illustrated, such as... Figure 2A As shown, the lens module 300 includes a viewing area 300a and a defocus area 300b. The defocus area 300b is located outside the viewing area 300a, and its refractive power differs from that of the viewing area 300a. Therefore, the degree of refraction of light after passing through the defocus area 300b and the viewing area 300a differs. For example, as... Figure 2B As shown, the lens module surface in the defocus region 300b has microlenses.

[0066] For example, when the wearer is looking straight ahead, they see objects through the viewing area 300a of the lens module 300, while from other angles, they see objects through the defocus area 300b.

[0067] In this way, the image of objects in the wearer's central vision is projected onto the retina, while the image of objects in the peripheral areas is not projected onto the retina, thus delaying the onset of myopia or hyperopia.

[0068] For example, taking myopic patients as an example, such as Figure 2C As shown, the image at the wearer's central visual field is projected onto the retina, while the image at the peripheral part is projected in front of the retina, forming a defocused state. This helps to inhibit the elongation of the wearer's axial length and can suppress the development of refractive errors.

[0069] However, because the shape and distribution of the viewing area 300a and defocus area 300b of the aforementioned lens are fixed, the defocus state of the wearer's eyeball remains constant during long-term wear of these corrective glasses. As time increases, the effect of suppressing the progression of refractive errors diminishes. Furthermore, since the positions of the central and peripheral portions of the corrective lens remain fixed, when the wearer needs to view objects through the peripheral portion, they must turn their head, resulting in poor comfort.

[0070] Therefore, in order to suppress the development of refractive errors and improve the comfort and compliance of wearing corrective glasses, this application also provides a smart wearable device, which may be, for example, smart glasses or the aforementioned corrective glasses.

[0071] like Figure 3 As shown, the smart wearable device 10 mainly includes a frame 100, an eye-tracking module 200, a lens module 300, a drive module 400, and a power module 600.

[0072] Regarding the frame size 100, as... Figure 4A As shown, the frame 100 includes a frame 110 and a pair of temples 120 connected to each other. The frame 110 is disposed between the pair of temples 120.

[0073] The smart wearable device 10 has a near-eye side on the same side as the temple 120 and an image side opposite the temple 120. That is, when the wearer wears the smart wearable device 10, the wearer's eyes are located on the near-eye side of the smart wearable device 10.

[0074] For the sake of illustration below, as Figure 4A As shown, a pair of temples 120 includes a first temple 121 and a second temple 122. The embodiments of this application do not limit the positions of the first temple 121 and the second temple 122.

[0075] That is, the frame 100 includes a frame 110, a first temple 121, and a second temple 122. Both the first temple 121 and the second temple 122 are connected to the frame 110, and the frame 110 is located between the first temple 121 and the second temple 122.

[0076] For example, such as Figure 4A As shown, the frame 110 can be a pair of frames 110 and a central beam. The two ends of the central beam are respectively connected to the two frames 110.

[0077] There may be two frames 110, which are connected to each other by a central beam. Correspondingly, two temples 120 are respectively disposed on both sides of the two frames 110.

[0078] Or, for example, such as Figure 4B As shown, the frame 110 can also be a one-piece frame. This application does not limit this aspect; it can be set reasonably according to actual needs.

[0079] The frame 110 can be a full-frame frame that completely covers the periphery of the lens module 300, or a semi-frame frame that covers at least part of the edge of the lens module 300. This application embodiment does not limit this.

[0080] For example, the frame 110 may be a ring-shaped structure, and the interior of the ring-shaped frame 110 is used to install the lens module 300.

[0081] Alternatively, for example, the aforementioned smart wearable device 10 may also be a frameless smart wearable device.

[0082] Continue to refer to Figure 3 The lens module 300 is set inside the frame 110.

[0083] In some embodiments, such as Figure 5 As shown, the lens module 300 may include a stacked liquid crystal lens 301 and a corrective lens 302.

[0084] The corrective lens 302 can be a convex lens with positive refractive power. Alternatively, the corrective lens 302 can be a concave lens with negative refractive power. This application does not limit the specific application; it can be configured appropriately according to actual needs.

[0085] For example, the corrective lens 302 can be disposed on the near-eye side of the liquid crystal lens 301. Alternatively, the corrective lens 302 can also be disposed on the far-eye side of the liquid crystal lens 301.

[0086] At this point, the liquid crystal lens 301 and the corrective lens 302 are bonded together. That is, the surface of the liquid crystal lens 301 near the corrective lens 302 is bonded to the surface of the corrective lens 302 near the liquid crystal lens 301. The liquid crystal lens 301 can be a curved mirror.

[0087] Alternatively, for example, the liquid crystal lens 301 may be disposed between the corrective lenses 302. For instance, the lens module 300 includes a first corrective lens, a liquid crystal lens 301, and a second corrective lens stacked sequentially.

[0088] In this case, the liquid crystal lens 301 can be a plane mirror, or it can be a curved mirror.

[0089] It should be noted that the lens module 300 in this embodiment can also be a liquid crystal lens 301. That is, the lens module 300 does not include the corrective lens 302. This embodiment does not limit this, and can be set according to the actual situation.

[0090] For example, such as Figure 5 As shown, the area of ​​human eye's line of sight corresponds to the viewing area 300a of the lens module 300, and the area outside the human eye's line of sight corresponds to the defocus area 300b of the lens module 300.

[0091] It is explained here that the visual area 300a, when used in conjunction with the corrective lens 302, can correct refractive errors to achieve clear vision.

[0092] In this embodiment, the viewing area 300a and the defocus area 300b can be dynamically adjusted according to the position of the human eye.

[0093] For example, continue to refer to Figure 3 The lens module 300 includes multiple refractive units 30. Each refractive unit 30 has a first state a1 and a second state a2. That is, the lens module 300 located within the refractive units 30 has a first state a1 and a second state a2.

[0094] When the lens module 300 located within the refractive unit 30 is in the first state a1, the lens module 300 located within the refractive unit 30 has a first refractive power.

[0095] When the lens module 300 located within the refractive unit 30 is in the second state a2, the lens module 300 located within the refractive unit 30 has a second refractive power. The first refractive power and the second refractive power are different.

[0096] It should be noted that the refractive power of the corrective lens 302 located in the refractive unit 30 is the same when it is in the first state a1 and the second state a2, while the refractive power of the liquid crystal lens 301 located in the refractive unit 30 is different when it is in the first state a1 and the second state a2.

[0097] For example, when the liquid crystal lens 301 located in the refractive unit 30 is in the first state a1, the refractive power of the liquid crystal lens 301 is zero. When the liquid crystal lens 301 located in the refractive unit 30 is in the second state a2, the refractive power of the liquid crystal lens 301 is not zero.

[0098] like Figure 3As shown, the refractive unit 30 in the first state a1 can be located at the center of the lens module 300, and the refractive unit 30 in the second state a2 can be located on the periphery of the refractive unit 30 in the first state a1.

[0099] In this way, when light passes through the liquid crystal lens 301 in the refractive unit 30 in the first state a1, no refraction occurs. When light passes through the liquid crystal lens 301 in the refractive unit 30 in the second state a2, refraction occurs. Therefore, the refractive unit 30 in the first state a1 can be regarded as the viewing area, and the refractive unit 30 in the second state a2 can be regarded as the defocus area.

[0100] In this embodiment, the first state a1 and the second state a2 of the refractive unit 30 can be adjusted, that is, the viewing area and the defocus area of ​​the lens module 300 can be adjusted.

[0101] In this embodiment, the position and number of the refractive units 30 in the first state a1 and the refractive units 30 in the second state a2 are not limited; they can be set reasonably according to the actual situation. Furthermore, the arrangement and division of the refractive units 30 are not limited in this embodiment.

[0102] Regarding the eye-tracking module 200, such as Figure 3 As shown, the eye-tracking module 200 is mounted on the frame 100.

[0103] The eye-tracking module 200 is used to monitor the position of the eyeballs. In other words, the eye-tracking module 200 is used to determine the visual center of the wearer's pupils, that is, to determine the wearer's viewing angle.

[0104] The eye-tracking module 200 can be mounted on the frame 110 or on the temple 120. This embodiment does not limit the placement of the eye-tracking module 200; it can be positioned appropriately according to actual needs.

[0105] Understandably, the eye-tracking module 200 is positioned to avoid being obstructed by the frame 100.

[0106] In some embodiments, the smart wearable device 10 includes two eye-tracking modules 200. The two eye-tracking modules 200 are respectively disposed on opposite sides of the frame 100.

[0107] This allows for the monitoring of the position of the wearer's two eyeballs separately.

[0108] by Figure 4A Taking the smart wearable device 10 shown as an example, two eye-tracking modules 200 are respectively set on the two frames 110.

[0109] Regarding the drive module 400, such as Figure 3 As shown, the drive module 400 is used to control the lens module 300 in the refractive unit 30 to be in the first state a1 or the second state a2 according to the position of the eyeball.

[0110] For example, the eye-tracking module 200 monitors the wearer's eye position, and the drive module 400 controls the multiple refractive units 30 included in the lens module 300 to present a first state a1 or a second state a2 according to the eye position monitored by the eye-tracking module 200.

[0111] In some embodiments, the number of refractive units 30 in the first state a1 is fixed, and the position of the refractive units 30 in the first state a1 can be controlled according to the monitored eye position to realize that the visual area moves with the wearer's eye.

[0112] For example, the radial dimension of the viewing area of ​​the lens module 300 can be 7mm to 11mm. For instance, the radial dimension of the viewing area can be 7mm, 8mm, 9mm, 10mm, or 11mm, etc.

[0113] In some embodiments, such as Figure 6 As shown, the smart wearable device 10 also includes a processor 500.

[0114] For example, the processor 500 is electrically connected to the drive module 400.

[0115] The processor 500 is used to generate a defocus scheme and generate a drive signal based on the defocus scheme.

[0116] The defocus scheme includes at least one of the number and position of refractive units 30 in a first state a1, and at least one of the number and position of refractive units 30 in a second state a2. For example, in different defocus schemes, the shape of the viewing area 300a is fixed, while the shape of the defocus area 300b changes.

[0117] The drive module 400 controls the lens module 300 in the refractive unit 30 to be in the first state a1 or the second state a2 according to the drive signal.

[0118] For example, the smart wearable device 10 may also include a communication module ( Figure 3 (Not illustrated in the image). The communication module is used to establish a communication connection with electronic devices. It can send the defocus scheme to the smart wearable device 10 through electronic devices. The drive module 400 generates a drive signal according to the received defocus scheme. The drive module 400 controls the lens module 300 in the refractive unit 30 to be in the first state a1 or the second state a2 according to the drive signal.

[0119] Electronic devices may include, for example, mobile phones, watches, or remote controls. These devices and the communication module can connect wirelessly via Wi-Fi, Bluetooth, mobile communication, or RFID.

[0120] For example, such as Figure 6 As shown, the smart wearable device 10 also includes a power module 600. The power module is used to supply power to modules such as the eye-tracking module 200, the drive module 400, the lens module 300, the processor 500, and the communication module.

[0121] Regarding lens module 300, such as Figure 7A As shown, the lens module 300 includes a first electrode 310, a liquid crystal layer 330, and a second electrode 320 stacked sequentially. That is, the liquid crystal lens 301 includes a first electrode 310, a liquid crystal layer 330, and a second electrode 320 stacked sequentially.

[0122] like Figure 7A As shown, the liquid crystal layer 330 is located between the first electrode 310 and the second electrode 320. The liquid crystal layer 330 includes a plurality of liquid crystal molecules 331.

[0123] For ease of illustration, the first direction x and the second direction y form the plane containing the lens module 300, and the first direction x and the second direction y are perpendicular. The thickness direction of the lens module 300 is taken as the third direction z. It should be clarified here that the third direction z is the normal to the plane xy. When no voltage is applied, the orientation of the long axis of the liquid crystal molecules 331 is parallel to the plane xy.

[0124] For example, liquid crystal molecules 331 are arranged in an array in the plane xy, and multiple layers of liquid crystal molecules 331 are arranged at intervals along the third direction z, and the long axis orientation of the liquid crystal molecules 331 is helical.

[0125] When no voltage is applied to the liquid crystal molecule 331, the long axis of the liquid crystal molecule 331 lies in the xy plane. After a voltage is applied to the liquid crystal molecule 331, the orientation of the long axis of the liquid crystal molecule 331 will rotate in the third direction z. For example, a voltage can be applied to the liquid crystal layer 330 through the first electrode 310 and the second electrode 320.

[0126] For example, by applying a voltage, the orientation of the long axis of the liquid crystal molecule 331 can be rotated from a direction parallel to the plane xy to a third direction z, wherein the angle of rotation of the long axis orientation of the liquid crystal molecule 331 is related to the magnitude of the applied voltage.

[0127] In some embodiments, the material of the liquid crystal layer 330 may primarily include cholesteric liquid crystal or nematic liquid crystal.

[0128] For example, such as Figure 7AAs shown, the material of the liquid crystal layer 330 includes cholesteric liquid crystal.

[0129] Regarding the liquid crystal molecule 331 of cholesteric liquid crystals, such as Figure 7A As shown, the orientation of the long axis of liquid crystal molecule 331 is parallel to the plane xy.

[0130] When a voltage is applied to the cholesteric liquid crystal, the long axis orientation of the liquid crystal molecules 331 rotates towards the third z-direction, which can change the equivalent refractive index of the liquid crystal layer 330. For example, when a voltage is applied to the cholesteric liquid crystal layer, the equivalent refractive index of the liquid crystal layer 330 decreases.

[0131] Or, for example, such as Figure 7B As shown, the material of the liquid crystal layer 330 includes nematic liquid crystal.

[0132] Regarding the liquid crystal molecule 331 of the nematic liquid crystal, such as Figure 7B As shown, the long axis directions of the liquid crystal molecules 331 are the same, that is, when no voltage is applied, the long axis directions of the liquid crystal molecules 331 in the nematic liquid crystal are all the first direction x.

[0133] The refractive index of light in the liquid crystal layer 330 changes with the orientation of the long axis of the liquid crystal molecules 331. Therefore, the refractive index of the liquid crystal layer 330 can be changed by adjusting the magnitude of the voltage applied to the liquid crystal layer 330.

[0134] In some embodiments, when the lens module 300 located in the refractive unit 30 is in the first state a1, at least a portion of the liquid crystal molecules 331 of the liquid crystal layer 330 located in the refractive unit 30 have a first angle with the thickness direction (third direction z) of the lens module 300, and the lens module 300 located in the refractive unit 30 has a first refractive power.

[0135] When the lens module 300 located in the refractive unit 30 is in the second state a2, at least a portion of the liquid crystal molecules 331 of the liquid crystal layer 330 located in the refractive unit 30 have a second angle with the thickness direction (third direction z) of the lens module 300, and the lens module 300 located in the refractive unit 30 has a second refractive power.

[0136] Among them, the first angle is different from the second angle, and the first refractive power is different from the second refractive power.

[0137] When the lens module 300 located in the refractive unit 30 is in the first state a1 and the second state a2, the long axis orientation of the liquid crystal molecules 331 is different.

[0138] It should be noted that the third direction z mentioned in the embodiments of this application can also be other directions, such as the first direction x or the second direction y, and the embodiments of this application do not limit this. Alternatively, it can be the angle between the liquid crystal molecule 331 and a certain plane, for example, the liquid crystal molecule 331 and the plane where the lens module 300 is located can have a first angle and a second angle.

[0139] For example, when the liquid crystal lens 301 located in the refractive unit 30 is in the first state a1, the refractive power of the lens module 300 located in the refractive unit 30 is zero, that is, the first refractive power is zero.

[0140] When the liquid crystal lens 301 located in the refractive unit 30 is in the second state a2, the refractive power of the lens module 300 located in the refractive unit 30 is not zero, that is, the second refractive power is not zero.

[0141] In one embodiment, such as Figure 7A As shown, the second electrode 320 includes a plurality of sub-electrodes 311, and the microstructure array 340 is disposed on the side of the first electrode 310 near the liquid crystal layer 330.

[0142] The voltage can be applied to the liquid crystal molecules 331 in different regions by using the sub-electrode 311.

[0143] For example, such as Figure 7A As shown, when the microstructure array 340 is disposed on the side of the electrode close to the liquid crystal layer 330, the microstructure array 340 and the multiple sub-electrodes 311 are respectively disposed on opposite sides of the liquid crystal layer 330.

[0144] In this way, the electrodes positioned opposite to the microstructure array 340 ( Figure 7A The second electrode 320 is flat and can be easily patterned to form multiple sub-electrodes 311.

[0145] Alternatively, by way of example, the microstructure array 340 and the plurality of sub-electrodes 311 are all disposed on the same side of the liquid crystal layer 330.

[0146] This application does not limit the specific implementation details; appropriate settings can be made according to the actual situation.

[0147] Or, for example, such as Figure 7B As shown, the first electrode 310 includes a plurality of sub-electrodes 311.

[0148] In this embodiment, the first electrode 310 or the second electrode 320 is not limited to including multiple sub-electrodes; it is sufficient that at least one of the first electrode 310 and the second electrode 320 includes multiple sub-electrodes 311. Alternatively, the first electrode 310 and the second electrode 320 may both be continuous electrodes, as long as it is possible to apply voltage to the liquid crystal layer 330 in sections.

[0149] In this embodiment of the application, one refractive unit 30 may correspond to one sub-electrode 311.

[0150] Alternatively, multiple refractive units 30 can correspond to one sub-electrode 311. In this case, one sub-electrode 311 can simultaneously control the liquid crystal lens 301 in multiple refractive units 30 to be in either a first state or a second state.

[0151] In some embodiments, such as Figure 7B As shown, the liquid crystal lens 301 also includes a substrate and a cover plate. For example, both the substrate and the cover plate are made of light-transmitting materials.

[0152] The substrate and the cover plate are respectively disposed on the outside of the first electrode 310 and the second electrode 320 to provide support for the liquid crystal lens 301 and protect the liquid crystal lens 301.

[0153] In some embodiments, the lens module 300 further includes an alignment layer (not shown in the figure).

[0154] In other words, the liquid crystal lens 301 also includes an alignment layer. The alignment layer is disposed between the electrode and the liquid crystal layer 330. For example, an alignment layer is disposed between the first electrode 310 and the liquid crystal layer 330, and an alignment layer is also disposed between the second electrode 320 and the liquid crystal layer 330.

[0155] The alignment layer is used to align the liquid crystal molecules 331 in the liquid crystal layer 330.

[0156] In this embodiment, the film structure and corresponding position of the liquid crystal lens 301 are not limited; they can be set according to the actual situation.

[0157] In some embodiments, such as Figure 7A As shown, the lens module 300 also includes a microstructure array 340. That is, the liquid crystal lens 301 also includes a microstructure array 340.

[0158] For example, the microstructure array 340 is located between the liquid crystal layer 330 and the first electrode 310 or the second electrode 320. For instance, as... Figure 7A As shown, the microstructure array 340 can be located between the liquid crystal layer 330 and the first electrode 310. Alternatively, the microstructure array 340 can also be located between the liquid crystal layer 330 and the second electrode 320.

[0159] Alternatively, for example, the microstructure array 340 is located on the side of the first electrode 310 or the second electrode 320 away from the liquid crystal layer 330. For instance, the microstructure array 340 may be located on the side of the first electrode 310 away from the liquid crystal layer 330. Alternatively, the microstructure array 340 may also be located on the side of the second electrode 320 away from the liquid crystal layer 330.

[0160] In other words, such as Figure 8A As shown, the first electrode 310 is disposed between the microstructure array 340 and the liquid crystal layer 330. The first electrode 310 is disposed on the surface of the microstructure array 340 near the liquid crystal layer 330, and the first electrode 310 is attached to the microstructure array 340.

[0161] For example, the substrate or cover plate can be integrated with the microstructure array 340.

[0162] In this way, when applying voltage to the first electrode 310 and the second electrode 320, uneven voltage drop across the liquid crystal layer 330 due to voltage division caused by the microstructure array 340 can be avoided. To compensate for voltage drop loss, a larger voltage would be required. Therefore, the liquid crystal lens 301 configured in this way requires a smaller voltage.

[0163] The embodiments of this application do not limit the location of the microstructure array 340. For ease of illustration, the following description assumes that the microstructure array 340 is located on the side of the first electrode 310 away from the liquid crystal layer 330.

[0164] like Figure 8A As shown, the microstructure array 340 includes a plurality of spaced-apart microstructures 341. The microstructures 341 are located within the refractive unit 30. For ease of illustration, one microstructure 341 is shown as corresponding to one refractive unit 30.

[0165] In other words, the lens module 300 located in the refractive unit 30, the liquid crystal lens 301 includes a first electrode 310, a microstructure 341, a liquid crystal layer 330 and a second electrode 320 stacked together.

[0166] In this embodiment of the application, a microstructure 341 may correspond to a sub-electrode 311.

[0167] Alternatively, multiple microstructures 341 can correspond to one sub-electrode 311. In this case, one sub-electrode 311 can simultaneously control the refractive index of the liquid crystal layer 330 corresponding to multiple microstructures 341. That is, one sub-electrode 311 can simultaneously control the state of multiple refractive units 30.

[0168] For example, when the lens module 300 located within the refractive unit 30 is in the first state a1, the liquid crystal layer 330 located within the refractive unit 30 has a first refractive index, and the refractive index of the microstructure 341 is the same as or close to the first refractive index. For instance, the refractive index of the microstructure 341 has a first difference from the first refractive index, and the first difference is zero or close to zero. When the refractive index of the microstructure 341 is the same as the first refractive index, the first difference is zero.

[0169] At this time, when light is transmitted within the liquid crystal lens 301, it passes sequentially through the microstructure 341 and the liquid crystal layer 330. Since the refractive indices of the microstructure 341 and the liquid crystal layer 330 are the same or similar, the light does not undergo refraction during transmission, or the angle of refraction is negligible, or the proportion of light energy undergoing refraction is negligible. That is, when light enters the liquid crystal layer 330 through the microstructure 341, no refraction occurs, or the refraction angle approaches zero, or only a very small portion of the light undergoes refraction. When the lens module 300 located within the refractive unit 30 is in the first state a1, the first refractive power of the lens module 300 (liquid crystal lens 301) located within the refractive unit 30 is zero.

[0170] It is explained here that when the first refractive power is zero, the light rays are converged onto the retina of the human eye through the refractive unit 30 in the first state a1.

[0171] For example, when the lens module 300 located within the refractive unit 30 is in the second state a2, the liquid crystal layer 330 located within the refractive unit 30 has a second refractive index, and the refractive index of the microstructure 341 is different from the second refractive index. For example, the refractive index of the microstructure 341 is greater than the second refractive index. Or, the refractive index of the microstructure 341 is less than the second refractive index.

[0172] At this point, the first difference between the first refractive index and the refractive index of microstructure 341 is less than the second difference between the second refractive index and the refractive index of microstructure 341. The second difference is much greater than the first difference.

[0173] At this time, when light propagates within the liquid crystal lens 301, it passes sequentially through the microstructure 341 and the liquid crystal layer 330. Due to the difference in refractive indices between the microstructure 341 and the liquid crystal layer 330, the light undergoes a reversal during propagation; that is, when the light enters the liquid crystal layer 330 through the microstructure 341, refraction occurs. When the lens module 300 located within the refractive unit 30 is in the second state a2, the lens module 300 within the refractive unit 30 possesses a second refractive power, and this second refractive power is not zero. In other words, the refractive index of the microstructure 341 differs from the second refractive index, corresponding to a positive or negative second refractive power.

[0174] The second refractive power can be positive or negative. In this embodiment, the sign of the second refractive power is not limited; it can be set reasonably according to the actual situation.

[0175] This clarifies that when the second refractive power is positive, light rays converge through the refractive unit 30 of the second state a2 to the front of the retina, thus slowing the progression of myopia. When the second refractive power is negative, light rays converge through the refractive unit 30 of the second state a2 to the back of the retina, thus slowing the progression of hyperopia.

[0176] In some embodiments, such as Figure 8A As shown, the side of microstructure 341 closest to liquid crystal layer 330 is convex.

[0177] For example, such as Figure 8A As shown, when the lens module 300 located within the refractive unit 30 is in the first state a1, there is no voltage difference between the first electrode 310 and the second electrode 320, i.e., the voltage difference is zero. In other words, no voltage is applied between the first electrode 310 and the second electrode 320 of the refractive unit 30.

[0178] At this time, within the refractive unit 30, the long axis orientation of the liquid crystal molecules 331 in the liquid crystal layer 330 is parallel to the plane where the liquid crystal layer 330 is located, that is, the long axis orientation of the liquid crystal molecules 331 has a first angle with the plane xy, and the degree of the first angle is zero.

[0179] Correspondingly, when the lens module 300 located in the refractive unit 30 is in the first state a1, the liquid crystal layer 330 located in the refractive unit 30 has a first refractive index, and the refractive index of the microstructure 341 is the same as or close to the first refractive index.

[0180] At this time, it can be equivalent to light being transmitted within the liquid crystal lens 301 without refraction. When the lens module 300 located within the refractive unit 30 is in the first state a1, the first refractive power of the lens module 300 located within the refractive unit 30 is zero.

[0181] For example, such as Figure 8B As shown, when the lens module 300 located within the refractive unit 30 is in the second state a2, there is a voltage difference between the first electrode 310 and the second electrode 320. That is, a voltage is applied between the first electrode 310 and the second electrode 320 of the refractive unit 30.

[0182] At this time, within the refractive unit 30, the long axis orientation of the liquid crystal molecules 331 in the liquid crystal layer 330 is perpendicular to the plane where the liquid crystal layer 330 is located. That is, the long axis orientation of the liquid crystal molecules 331 is rotated from the direction parallel to the plane xy to the third direction z. After rotation, the long axis orientation of the liquid crystal molecules 331 has a second angle with the plane xy, and the degree of the second angle is not zero.

[0183] Correspondingly, when the lens module 300 located within the refractive unit 30 is in the second state a2, the liquid crystal layer 330 located within the refractive unit 30 has a second refractive index, and the refractive index of the microstructure 341 is different from the second refractive index. For example, the refractive index of the microstructure 341 is greater than the second refractive index.

[0184] At this time, when light propagates within the liquid crystal lens 301, it passes sequentially through the microstructure 341 and the liquid crystal layer 330, resulting in refraction. When the lens module 300 located within the refractive unit 30 is in the second state a2, the lens module 300 within the refractive unit 30 has a second refractive power, and this second refractive power is not zero. That is, the refractive index of the microstructure 341 is greater than the second refractive index, corresponding to a positive second refractive power.

[0185] In other embodiments, such as Figure 9A As shown, the side of microstructure 341 closest to liquid crystal layer 330 is concave.

[0186] For example, such as Figure 9A As shown, when the lens module 300 located within the refractive unit 30 is in the first state a1, there is a voltage difference between the first electrode 310 and the second electrode 320. That is, a voltage is applied between the first electrode 310 and the second electrode 320 of the refractive unit 30.

[0187] At this time, within the refractive unit 30, the long axis orientation of the liquid crystal molecules 331 in the liquid crystal layer 330 is perpendicular to the plane where the liquid crystal layer 330 is located. That is, the long axis orientation of the liquid crystal molecules 331 is rotated from the direction parallel to the plane xy to the third direction z. After rotation, the long axis orientation of the liquid crystal molecules 331 has a first angle with the plane xy, and the degree of the first angle is not zero.

[0188] Correspondingly, when the lens module 300 located in the refractive unit 30 is in the first state a1, the liquid crystal layer 330 located in the refractive unit 30 has a first refractive index, and the refractive index of the microstructure 341 is the same as or close to the first refractive index.

[0189] At this time, it can be equivalent to light being transmitted within the liquid crystal lens 301 without refraction. When the lens module 300 located within the refractive unit 30 is in the first state a1, the first refractive power of the lens module 300 located within the refractive unit 30 is zero.

[0190] For example, such as Figure 9B As shown, when the lens module 300 located within the refractive unit 30 is in the second state a2, there is no voltage difference between the first electrode 310 and the second electrode 320, i.e., the voltage difference is zero. In other words, no voltage is applied between the first electrode 310 and the second electrode 320 of the refractive unit 30.

[0191] At this time, within the refractive unit 30, the long axis orientation of the liquid crystal molecules 331 in the liquid crystal layer 330 is parallel to the plane xy where the liquid crystal layer 330 is located, that is, there is a second angle between the long axis orientation of the liquid crystal molecules 331 and the plane xy, and the degree of the second angle is zero.

[0192] Correspondingly, when the lens module 300 located within the refractive unit 30 is in the second state a2, the liquid crystal layer 330 located within the refractive unit 30 has a second refractive index, and the refractive index of the microstructure 341 is different from the second refractive index. For example, the refractive index of the microstructure 341 is less than the second refractive index.

[0193] At this time, when light propagates within the liquid crystal lens 301, it passes sequentially through the microstructure 341 and the liquid crystal layer 330, resulting in refraction. When the lens module 300 located within the refractive unit 30 is in the second state a2, the lens module 300 within the refractive unit 30 has a second refractive power, and this second refractive power is not zero. The refractive index of the microstructure 341 is different from the second refractive index, corresponding to a positive second refractive power.

[0194] In some embodiments, the side of the microstructure 341 near the liquid crystal layer 330 is concave.

[0195] For example, when the lens module 300 located in the refractive unit 30 is in the first state a1, there is no voltage difference between the first electrode 310 and the second electrode 320, that is, the voltage difference is zero.

[0196] At this time, the liquid crystal layer 330 located within the refractive unit 30 has a first refractive index, and the refractive index of the microstructure 341 is the same as or close to the first refractive index, which is equivalent to light being transmitted within the liquid crystal lens 301 without refraction. When the lens module 300 located within the refractive unit 30 is in the first state a1, the first refractive power of the lens module 300 located within the refractive unit 30 is zero.

[0197] For example, when the lens module 300 located in the refractive unit 30 is in the second state a2, there is a voltage difference between the first electrode 310 and the second electrode 320.

[0198] At this time, the liquid crystal layer 330 located within the refractive unit 30 has a second refractive index, and the refractive index of the microstructure 341 is greater than the second refractive index. When the lens module 300 located within the refractive unit 30 is in the second state a2, the lens module 300 located within the refractive unit 30 has a second refractive power, which is negative.

[0199] In other embodiments, the side of microstructure 341 closest to liquid crystal layer 330 is convex.

[0200] For example, when the lens module 300 located in the refractive unit 30 is in the first state a1, there is a voltage difference between the first electrode 310 and the second electrode 320.

[0201] At this time, the liquid crystal layer 330 located within the refractive unit 30 has a first refractive index, and the refractive index of the microstructure 341 is the same as or close to the first refractive index, which is equivalent to light being transmitted within the liquid crystal lens 301 without refraction. When the lens module 300 located within the refractive unit 30 is in the first state a1, the first refractive power of the lens module 300 located within the refractive unit 30 is zero.

[0202] For example, when the lens module 300 located in the refractive unit 30 is in the second state a2, there is no voltage difference between the first electrode 310 and the second electrode 320, that is, the voltage difference is zero.

[0203] At this time, the liquid crystal layer 330 located within the refractive unit 30 has a second refractive index, and the refractive index of the microstructure 341 is greater than the second refractive index. When the lens module 300 located within the refractive unit 30 is in the second state a2, the lens module 300 located within the refractive unit 30 has a second refractive power, which is negative.

[0204] In some other embodiments, such as Figure 10A As shown, the first electrode 310 includes a plurality of sub-electrodes 311 arranged at intervals.

[0205] In other words, the lens module 300 located in the refractive unit 30, the liquid crystal lens 301 includes a sub-electrode 311, a liquid crystal layer 330 and a second electrode 320 stacked together.

[0206] At this time, the liquid crystal lens 301 shares the second electrode 320.

[0207] For example, such as Figure 10A As shown, when the lens module 300 located within the refractive unit 30 is in the first state a1, there is no voltage difference between the sub-electrode 311 and the second electrode 320, i.e., the voltage difference is zero. In other words, no voltage is applied between the sub-electrode 311 and the second electrode 320 of the refractive unit 30.

[0208] At this time, within the refractive unit 30, the long axis orientation of the liquid crystal molecules 331 in the liquid crystal layer 330 is parallel to the plane where the liquid crystal layer 330 is located, that is, there is a first angle between the long axis orientation of the liquid crystal molecules 331 and the direction parallel to the plane xy (the first direction x), and the degree of the first angle is zero.

[0209] Correspondingly, when the lens module 300 located in the refractive unit 30 is in the first state a1, the liquid crystal layer 330 located in the refractive unit 30 has a first refractive index.

[0210] At this time, the light is transmitted within the liquid crystal lens 301 without scattering, and the light is converged onto the retina of the human eye by the refractive unit 30 in the first state a1.

[0211] For example, such as Figure 10B As shown, when the lens module 300 located within the refractive unit 30 is in the second state a2, there is a voltage difference between the first electrode 310 and the second electrode 320. That is, a voltage is applied between the first electrode 310 and the second electrode 320 of the refractive unit 30.

[0212] At this time, within the refractive unit 30, the long axis orientation of the liquid crystal molecules 331 in the liquid crystal layer 330 is parallel to the plane where the liquid crystal layer 330 is located. That is, the long axis orientation of the liquid crystal molecules 331 rotates from the direction parallel to the plane xy (the first direction x) to the third direction z. The long axis orientation of the rotated liquid crystal molecules 331 has a second angle with the first direction x, and the degree of the second angle is not zero.

[0213] Correspondingly, when the lens module 300 located within the refractive unit 30 is in the second state, the liquid crystal layer 330 located within the refractive unit 30 has a second refractive index.

[0214] At this time, light is transmitted within the liquid crystal lens 301, and the light is scattered. After being transmitted through the refractive unit 30 in the second state, part of the light is transmitted to the retina of the human eye, while part is not transmitted to the retina of the human eye.

[0215] Light is transmitted to the retina through the visual area 300a. After being transmitted through the defocus area 300b, the light is scattered, which changes the contrast on the retina. For example, the defocus area reduces the contrast of the light, which can slow down the growth of the axial length of the eye and effectively inhibit the development of refractive errors.

[0216] In this embodiment, the refractive unit 30 can be switched between a first state a1 and a second state a2.

[0217] In some embodiments, such as Figure 11A and Figure 11B As shown, the first electrode 310 or the second electrode 320 can be arrayed. For example, the first electrode 310 can be arranged in a two-dimensional array. Each sub-electrode 311 can be controlled individually, or multiple sub-electrodes 311 can be controlled to control whether the voltage applied to the liquid crystal layer 330 in the refractive unit 30 is applied, so as to regulate the arrangement of the liquid crystal molecules 331.

[0218] In this embodiment, one sub-electrode 311 controls one refractive unit 30, or one sub-electrode 311 can control multiple refractive units 30. This application does not limit this, and can be reasonably set according to the actual situation.

[0219] For example, the sub-electrode 311 may include shapes such as quadrilaterals, hexagons, and concentric rings, or the array electrodes may be randomly arranged.

[0220] like Figure 11A As shown, the lens module 300 can be divided into multiple closely packed hexagons, each hexagon serving as a refractive unit 30. The state of the lens module 300 within each refractive unit 30 can be adjusted. In this way, the relationship between the refractive indices of the liquid crystal lenses 301 within the refractive unit 30 can be controlled by whether or not a voltage difference is applied, thereby enabling the lens module 300 within the refractive unit 30 to switch between a first state a1 and a second state a2, achieving dynamic adjustment of the viewing area 300a and the defocus area 300b. The following explanation will refer to the first state a1 as the viewing area 300a and the second state a2 as the defocus area 300b.

[0221] For example, such as Figure 12A As shown, the visual area 300a and the defocus area 300b can be dynamically adjusted as the wearer's eyes move. In other words, a defocus area distribution scheme is generated based on the position of the wearer's eyes.

[0222] like Figure 12A As shown, the number of refractive units 30 included in the viewing area 300a is fixed, and correspondingly, the number of refractive units 30 included in the defocus area 300b is also fixed. Figure 12A The indicated adjustment is to change the relative positions of the visual area 300a and the defocus area 300b on the lens module 300 according to the position of the eyeball. That is, the visual area 300a is moved as a whole on the lens module 300.

[0223] Or, for example, such as Figure 12B As shown, the pattern in the out-of-focus area 300b can also be adjusted.

[0224] In other words, the arrangement of the refractive units 30 in the defocus region 300b is changed.

[0225] For example, such as Figure 12B As shown, the pattern in the out-of-focus area 300b is adjusted to a concentric ring structure. Alternatively, as... Figure 12C As shown, the pattern in the out-of-focus area 300b is randomly distributed.

[0226] Or, for example, such as Figure 12D As shown, the relative positional relationship between the viewing area 300a and the defocus area 300b can also be adjusted.

[0227] In other words, the number and arrangement of the refractive units 30 included in the visual region 300a are changed.

[0228] For example, the area enclosed by the viewing area 300a can be a circle, rectangle, polygon, or irregular shape. This application does not impose such limitations; it can be set reasonably according to the actual situation.

[0229] It is clarified here that a defocus scheme can be sent to the smart wearable device 10 via an electronic device. The processor 500 generates a drive signal based on the defocus scheme, and the drive module 400 controls the lens module 300 within the refractive unit 30 to be in either the first state a1 or the second state a2 based on the drive signal.

[0230] The defocus scheme may include at least one of the number and position of refractive units 30 in a first state a1, and at least one of the number and position of refractive units 30 in a second state a2. That is, the defocus scheme is the distribution of the defocus region 300b. For example, in different defocus schemes, the shape of the visual region 300a is fixed, while the shape of the defocus region 300b changes. In the same defocus scheme, the position of the visual region 300a changes according to the position of the wearer's eyeball tracked by the eye-tracking module 200.

[0231] The smart wearable device 10 provided in this application embodiment includes an eye-tracking module 200 capable of tracking the wearer's eye position, and a driving module capable of controlling the lens module 300 within the refractive unit 30 to be in either a first state a1 or a second state a2 based on the eye position. A power module can apply voltage to the lens module to change the refractive unit's position in either the first or second state. The power module also provides power to both the eye-tracking module and the driving module. In this embodiment, the refractive unit 30 in the first state a1 constitutes the visual area 300a of the lens module 300, and the refractive unit 30 in the second state a2 constitutes the defocus area 300b of the lens module 300. The first state a1 and the second state a2 of the lens module 300 within the refractive unit 30 can be dynamically adjusted. Therefore, the visual area 300a and the defocus area 300b of the lens module 300 can be dynamically adjusted according to the wearer's eye usage, so that the visual area 300a of the lens module 300 can be continuously and stably centered on the wearer's pupil, and the defocus area 300b can continuously correct the defocus of the eyeball, thereby more effectively suppressing the development of refractive errors, while also improving wearing comfort and compliance.

[0232] Furthermore, the smart wearable device 10 provided in this application embodiment can adjust the shape of the visual area 300a and the defocus area 300b according to the actual situation of the wearer, thereby more effectively suppressing the development of refractive errors.

[0233] In the solution provided in this application embodiment, the lens module 300 of the smart wearable device 10 controls the refractive power of the lens module 300 by whether or not a voltage is applied to the liquid crystal layer 330, which has the advantages of high flexibility and small size.

[0234] Based on the above description of the smart wearable device 10, the following, in conjunction with... Figures 12A-12DThe working method of the above-mentioned smart wearable device 10 is explained.

[0235] like Figure 13 As shown in the embodiments of this application, a method for operating a smart wearable device 10 is also provided, including:

[0236] S11, Eye-tracking module 200 monitors eye position.

[0237] The eye-tracking module 200 monitors the position of the eyes. In other words, the eye-tracking module 200 determines the wearer's pupil visual center, i.e., the eye-tracking module 200 determines the wearer's viewing angle.

[0238] S12, the processor 500 generates a defocus area distribution scheme and generates a drive signal based on the defocus area distribution scheme.

[0239] The defocus area distribution scheme can be the position of the viewing area 300a.

[0240] S13, the drive module 400 controls the lens module 300 in the refractive unit 30 to be in the first state a1 or the second state a2 according to the drive signal.

[0241] For example, the eye-tracking module 200 monitors the wearer's eye position, and the drive module 400 controls the multiple refractive units 30 included in the lens module 300 to present a first state a1 or a second state a2 according to the eye position monitored by the eye-tracking module 200.

[0242] The adjustment of the state of the lens module 300 in step S3 is the same as in the above embodiments, and you can refer to the relevant description of the lens module 300 in the above embodiments.

[0243] In other embodiments, such as Figure 14 As shown, this application embodiment also provides another method of operating a smart wearable device 10, including:

[0244] S21, The smart wearable device 10 establishes a communication connection with the electronic device.

[0245] For example, the smart wearable device 10 also includes a communication module that establishes a communication connection with an electronic device. The electronic device may include, for example, a mobile phone, a watch, or a remote control. The electronic device and the communication module can establish a wireless communication connection.

[0246] S22, The electronic device sends the defocusing scheme to the smart wearable device 10.

[0247] For example, the electronic device sends the defocus solution to the processor 500 of the smart wearable device 10.

[0248] The defocusing scheme includes at least one of the number and position of refractive units 30 in the first state a1, and at least one of the number and position of refractive units 30 in the second state a2.

[0249] The description of the defocusing scheme in step S22 is the same as in the above embodiments. For details, please refer to the relevant description of the defocusing scheme in the above embodiments.

[0250] S23, Processor 500 generates drive signals according to the defocusing scheme.

[0251] The processor 500 generates a drive signal based on the received defocus scheme.

[0252] S24. The drive module 400 controls the lens module 300 in the refractive unit 30 to be in the first state a1 or the second state a2 according to the drive signal.

[0253] In step S24, the drive module 400 controls the state of the lens module 300 according to the drive signal in the same way as in step S13 above. For details, please refer to the description in the above embodiments, which will not be repeated here.

[0254] In this way, the defocus scheme can be sent to the smart wearable device 10 through the electronic device to change the state of the lens module 300 in the refractive unit 30, thereby changing the distribution of the viewing area 300a and the defocus area 300b, as well as changing the arrangement of the refractive unit 30 in the defocus area 300b.

[0255] Based on this, this application embodiment also provides a lens module 300, including a first electrode 310, a liquid crystal layer 330 and a second electrode 320 stacked sequentially.

[0256] The lens module 300 is similar to the lens module 300 in the above embodiments. Please refer to the relevant description of the lens module 300 in the above embodiments, which will not be repeated here.

[0257] In some embodiments, the lens module 300 further includes a microstructure array 340. The microstructure array 340 includes a plurality of spaced-apart microstructures 341; the microstructures 341 are located within the refractive unit 30; when the lens module 300 within the refractive unit 30 is in a first state a1, the liquid crystal layer 330 within the refractive unit 30 has a first refractive index, and the refractive index of the microstructures 341 has a first difference from the first refractive index; when the lens module 300 within the refractive unit 30 is in a second state a2, the liquid crystal layer 330 within the refractive unit 30 has a second refractive index, and the refractive index of the microstructures 341 has a second difference from the second refractive index, wherein the first difference is less than the second difference. This provides an implementation method for the lens module 300 within the refractive unit 30 to be in the first state a1 and the second state a2.

[0258] For example, the refractive index of microstructure 341 may be equal to or infinitely close to the first refractive index.

[0259] In some embodiments, the first refractive power is zero, and the second refractive power is not zero. In this way, when the lens module 300 located in the refractive unit 30 is in the first state a1, it can serve as the viewing area 300a of the lens module 300, and when the lens module 300 located in the refractive unit 30 is in the second state a2, it can serve as the defocus area 300b of the lens module 300.

[0260] In some embodiments, the microstructure 341 is convex on the side near the liquid crystal layer 330; when the lens module 300 located within the refractive unit 30 is in the first state a1, there is no voltage difference between the first electrode 310 and the second electrode 320, and the first angle is zero; when the lens module 300 located within the refractive unit 30 is in the second state a2, there is a voltage difference between the first electrode 310 and the second electrode 320, and the second angle is not zero. This provides an implementation method for the lens module 300 located within the refractive unit 30 to be in the first state a1 and the second state a2.

[0261] In some embodiments, the microstructure 341 is concave on the side near the liquid crystal layer 330; when the lens module 300 located within the refractive unit 30 is in the first state a1, there is a voltage difference between the first electrode 310 and the second electrode 320, and the first angle is not zero; when the lens module 300 located within the refractive unit 30 is in the second state a2, there is no voltage difference between the first electrode 310 and the second electrode 320, and the second angle is equal to zero. This provides an implementation method for the lens module 300 located within the refractive unit 30 to be in the first state a1 and the second state a2.

[0262] In some embodiments, the first electrode 310 includes a plurality of spaced sub-electrodes 311; when the lens module 300 located within the refractive unit 30 is in a first state a1, there is no voltage difference between the first electrode 310 and the second electrode 320, and the first angle is zero; when the lens module 300 located within the refractive unit 30 is in a second state a2, there is a voltage difference between the first electrode 310 and the second electrode 320, and a portion of the liquid crystal molecules 331 corresponding to the sub-electrodes 311 have a second angle with the plane where the lens module 300 is located. This provides an implementation method in which the lens module 300 located within the refractive unit 30 is in the first state a1 and the second state a2.

[0263] In some embodiments, the liquid crystal layer 330 includes a cholesteric liquid crystal layer 330 or a nematic liquid crystal layer 330. This provides an implementation of a lens module 300.

[0264] In some embodiments, the lens module 300 further includes a corrective lens 302; the corrective lens 302 is disposed on the side of the first electrode 310 or the second electrode 320 away from the liquid crystal layer 330. This provides an implementation of the lens module 300.

[0265] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope 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 module, characterized in that, include: The lens module comprises a first electrode, a liquid crystal layer, and a second electrode stacked sequentially, and includes multiple refractive units. The lens module located within the refractive units has a first state and a second state. When the lens module located within the refractive unit is in the first state, at least a portion of the liquid crystal molecules in the liquid crystal layer located within the refractive unit have a first angle with the plane where the lens module is located, and the lens module located within the refractive unit has a first refractive power; When the lens module located within the refractive unit is in the second state, at least a portion of the liquid crystal molecules in the liquid crystal layer located within the refractive unit have a second angle with the plane where the lens module is located, and the lens module located within the refractive unit has a second refractive power; wherein, the first angle is different from the second angle, and the first refractive power is different from the second refractive power.

2. The lens module according to claim 1, characterized in that, The lens module further includes a microstructure array; the microstructure array is disposed on the side of the liquid crystal layer away from the second electrode; the microstructure array includes multiple spaced microstructures; the microstructures are located within the refractive unit; the second electrode includes multiple sub-electrodes; When the lens module located within the refractive unit is in the first state, the liquid crystal layer located within the refractive unit has a first refractive index, and the refractive index of the microstructure has a first difference from the first refractive index; When the lens module located within the refractive unit is in the second state, the liquid crystal layer located within the refractive unit has a second refractive index, and the refractive index of the microstructure has a second difference from the second refractive index; The first difference is less than the second difference.

3. The lens module according to claim 2, characterized in that, The microstructure array is disposed on the side of the first electrode away from the liquid crystal layer; or, The microstructure array is disposed on the side of the first electrode near the liquid crystal layer.

4. The lens module according to claim 2 or 3, characterized in that, The first refractive power is zero, and the second refractive power is not zero.

5. The lens module according to any one of claims 2-4, characterized in that, The microstructure has a convex surface on the side closest to the liquid crystal layer; When the lens module located within the refractive unit is in the first state, there is no voltage difference between the first electrode and the second electrode, the first angle is equal to zero, and the first refractive power is zero. When the lens module located within the refractive unit is in the second state, there is a voltage difference between the first electrode and the second electrode, the second angle is not zero, and the second refractive power is greater than zero. or, When the lens module located in the refractive unit is in the first state, there is a voltage difference between the first electrode and the second electrode, the first angle is not zero, and the first refractive power is zero. When the lens module located within the refractive unit is in the second state, there is no voltage difference between the first electrode and the second electrode, the second angle is equal to zero, and the second refractive power is less than zero.

6. The lens module according to any one of claims 2-4, characterized in that, The microstructure has a concave surface on the side closest to the liquid crystal layer; When the lens module located in the refractive unit is in the first state, there is a voltage difference between the first electrode and the second electrode, the first angle is not zero, and the first refractive power is zero. When the lens module located within the refractive unit is in the second state, there is no voltage difference between the first electrode and the second electrode, the second angle is equal to zero, and the second refractive power is greater than zero. or, When the lens module located within the refractive unit is in the first state, there is no voltage difference between the first electrode and the second electrode, the first angle is equal to zero, and the first refractive power is zero. When the lens module located within the refractive unit is in the second state, there is a voltage difference between the first electrode and the second electrode, the second angle is not zero, and the second refractive power is less than zero.

7. The lens module according to claim 1, characterized in that, The first electrode includes a plurality of sub-electrodes spaced apart; When the lens module located within the refractive unit is in the first state, there is no voltage difference between the first electrode and the second electrode, and the first angle is equal to zero. When the lens module located within the refractive unit is in the second state, there is a voltage difference between the first electrode and the second electrode, and the portion of the liquid crystal molecules corresponding to the sub-electrode has a second angle with the plane where the lens module is located.

8. The lens module according to any one of claims 1-7, characterized in that, The liquid crystal layer includes a cholesteric liquid crystal layer or a nematic liquid crystal layer.

9. The lens module according to any one of claims 1-8, characterized in that, The lens module also includes a corrective lens; the corrective lens is disposed on the side of the first electrode or the second electrode away from the liquid crystal layer.

10. A smart wearable device, characterized in that, include: A frame, comprising a pair of temples and a frame disposed between the pair of temples; A lens module is disposed within the lens frame. The lens module comprises a first electrode, a liquid crystal layer, and a second electrode stacked sequentially. The lens module includes multiple refractive units. The lens module located within the refractive units has a first state and a second state. When the lens module is in the first state, at least a portion of the liquid crystal molecules in the liquid crystal layer within the refractive unit have a first angle with the plane where the lens module is located, and the lens module has a first refractive power. When the lens module is in the second state, at least a portion of the liquid crystal molecules in the liquid crystal layer within the refractive unit have a second angle with the plane where the lens module is located, and the lens module has a second refractive power. The first angle and the second angle are different, and the first refractive power and the second refractive power are different. An eye-tracking module is mounted on the frame; the eye-tracking module is used to monitor the position of the eyeballs. A driving module is disposed on the frame; the driving module is used to control the lens module in the refractive unit to be in a first state or a second state according to the position of the eyeball; A power module is disposed on the frame; the power module is used to supply power to the lens module, the eye-tracking module and the drive module.

11. The smart wearable device according to claim 10, characterized in that, The smart wearable device further includes a processor disposed on the eyeglass frame; the processor is used to generate a defocus scheme and generate a drive signal according to the defocus scheme; the defocus scheme includes at least one of the number and position of the refractive units in a first state, and at least one of the number and position of the refractive units in a second state; The driving module controls the lens module within the refractive unit to be in a first state or a second state according to the driving signal.

12. The smart wearable device according to claim 10 or 11, characterized in that, The smart wearable device is also used to establish a communication connection with an electronic device; the electronic device is used to send the defocusing scheme to the processor of the smart wearable device; the processor is used to generate a drive signal according to the received defocusing scheme; The driving module is used to control the lens module in the refractive unit to be in a first state or a second state according to the driving signal.

13. The smart wearable device according to any one of claims 10-12, characterized in that, The smart wearable device includes two eye-tracking modules; the two eye-tracking modules are respectively located on opposite sides of the frame.

14. The smart wearable device according to any one of claims 10-13, characterized in that, After being refracted by the refractive unit in its first state, the light enters the eyeball and converges on the retina of the eyeball.

15. A method for operating a smart wearable device, characterized in that, The smart wearable device includes: a lens module comprising multiple refractive units; when the refractive units are in a first state, the lens module located within the refractive units has a first refractive power; when the refractive units are in a second state, the lens module located within the refractive units has a second refractive power; the first refractive power and the second refractive power are different; an eye-tracking module; a driving module; and a processor; The method of operating the smart wearable device includes: The eye-tracking module monitors the position of the eyeballs; The processor generates a defocus region distribution scheme and generates a drive signal according to the defocus region distribution scheme; the defocus region distribution scheme includes at least one of the number and position of the refractive units in a first state, and at least one of the number and position of the refractive units in a second state. The driving module controls the lens module within the refractive unit to be in a first state or a second state according to the driving signal.

16. The method of operating the smart wearable device according to claim 15, characterized in that, The smart wearable device also establishes a communication connection with an electronic device; the electronic device sends a defocusing scheme to the processor of the smart wearable device; the defocusing scheme includes at least one of the number and position of the refractive units in a first state, and at least one of the number and position of the refractive units in a second state; The processor generates a drive signal based on the received defocusing scheme; The driving module controls the lens module within the refractive unit to be in a first state or a second state according to the driving signal.

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