Lens module and eyeglasses

Abstract

This application relates to a lens module and eyeglasses. The lens module includes a lens body and a power supply circuit. The lens body includes a flexible film defining a cavity and a transparent liquid contained within the cavity. A conductive block array is disposed on the flexible film, and the conductive block array includes multiple conductive blocks spaced apart from each other. The power supply circuit provides a driving voltage to the conductive blocks in the conductive block array to change the curvature of the flexible film. Thus, as the voltage of each conductive block changes continuously, the curvature of the flexible film also changes continuously, thereby enabling continuous adjustment of the lens power. By applying a maximum or minimum voltage to a specific conductive block, the position of the optical center of the lens can be adjusted. Since the lens module in this embodiment changes the curvature of the flexible film by applying voltage to the conductive blocks on the flexible film, it does not require a complex mechanical structure. Therefore, the lens structure has low complexity, and the light transmission aperture of this lens module is large.

Description

Technical Field

[0001] This application relates to the technical field of eyeglasses, and in particular to a lens module and eyeglasses. Background Technology

[0002] With the continuous development of display technology, adjustable focal length lenses are gradually replacing fixed focal length lenses, such as in myopia glasses, cameras, mobile phones, virtual reality devices, and augmented reality devices.

[0003] In traditional technology, adjustable focal length lenses are typically achieved using elastic film liquid lenses. The principle behind this is as follows: a high-refractive-index liquid is encapsulated in a flexible film, and a mechanical structure is designed for the flexible film. By controlling the mechanical structure to generate external force to squeeze the film, the curvature at the center of the film changes accordingly, thus changing the focal length of the lens and thereby altering the lens power. Furthermore, if the magnitude of the applied external force changes continuously, the radius of curvature at the center of the film will also change continuously, thereby enabling continuous adjustment of the lens power.

[0004] However, traditional elastic film liquid lenses have a relatively complex mechanical structure and cannot achieve adjustment of the lens's optical center. Summary of the Invention

[0005] Based on this, embodiments of this application provide a lens module and eyeglasses that can reduce the complexity of the lens structure while achieving continuous adjustment of the lens power, and at the same time achieve adjustment of the optical center of the lens.

[0006] In a first aspect, a lens module is provided, comprising: a lens body, the lens body including a flexible film defining a cavity and a transparent liquid contained within the cavity, the flexible film having a conductive block array disposed thereon, the conductive block array including a plurality of conductive blocks spaced apart from each other; and

[0007] A power supply circuit is used to provide driving voltage to the conductive blocks in the conductive block array to change the curvature of the flexible film.

[0008] In a second aspect, there is provided a pair of eyeglasses comprising a lens module according to any one of the first aspects described above.

[0009] The lens module provided in this application includes a lens body and a power supply circuit. The lens body includes a flexible thin film defining a cavity and a transparent liquid contained within the cavity. A conductive block array is disposed on the flexible thin film, and the conductive block array includes multiple conductive blocks spaced apart from each other. The power supply circuit provides a driving voltage to the conductive blocks in the conductive block array to change the curvature of the flexible thin film. Thus, as the voltage of each conductive block changes continuously, the curvature of the flexible thin film also changes continuously, thereby enabling continuous adjustment of the lens power. Furthermore, by applying a maximum or minimum voltage to a specific conductive block, the position of the lens's optical center can be adjusted. Since the lens module in this application changes the curvature of the flexible thin film by applying voltage to the conductive blocks on the flexible thin film, without requiring a complex mechanical structure, its lens structure is less complex than that of existing elastic film liquid lenses, and the light transmission aperture of this lens module is larger. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a lens module provided in an embodiment of this application;

[0011] Figure 2 This is a schematic diagram of a flexible film and cavity in a lens module provided in an embodiment of this application;

[0012] Figure 3 This is a schematic diagram of the cavity deformation in a lens module provided in an embodiment of this application;

[0013] Figure 4 A schematic diagram of a conductive block array on a flexible thin film in a lens module provided in an embodiment of this application;

[0014] Figure 5 A schematic diagram showing the connection between each conductive block of a conductive block array on a flexible thin film in a lens module and a power supply circuit, provided as an embodiment of this application.

[0015] Figure 6 This is a schematic diagram showing the position of the optical center in a lens module according to an embodiment of this application;

[0016] Figure 7 A schematic diagram of different annular regions in a lens module determined based on the position of the optical center, provided as an embodiment of this application;

[0017] Figure 8 This is a schematic diagram of the cavity deformation in another lens module provided in an embodiment of this application;

[0018] Figure 9 A schematic diagram of a flexible film and cavity in another lens module provided in this application embodiment;

[0019] Figure 10 A schematic diagram of a flexible film and cavity in another lens module provided in this application embodiment;

[0020] Figure 11 A schematic diagram of the cavity in another lens module provided in this application embodiment after it has undergone concave deformation;

[0021] Figure 12 A schematic diagram of the cavity in another lens module provided in this application embodiment after expansion and deformation;

[0022] Figure 13 This is a schematic diagram of the lens structure of an AR glasses provided in an embodiment of this application;

[0023] Figure 14 This is a schematic diagram of the lens structure of another type of AR glasses provided in an embodiment of this application.

[0024] Figure label:

[0025] 10: Lens body; 20: Power supply circuit; 101: Flexible film; 102: Transparent liquid;

[0026] 1011: First flexible film; 1012: Second flexible film; 103: Support member;

[0027] 104: Flexible container; 301: First connector; 302: Optical waveguide lens; 303: Lens module;

[0028] 304: Second connector; 305: Protective lens. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0030] In the description of the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first," "second," and "third" may explicitly or implicitly include one or more features.

[0031] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "connected" should be interpreted broadly. For example, they can be electrical connections, fixed connections, detachable connections, or integral connections. They can be direct connections or indirect connections. They can be the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0032] The following disclosure provides many different embodiments or examples for implementing different structures of the embodiments of this application. In order to simplify the description of the embodiments of this application, only specific components and settings are described below, which are merely examples and are not intended to limit the scope of protection of this application.

[0033] The global rate of myopia has increased significantly, leading to a substantial increase in the demand for myopia correction. For those with myopia, wearing glasses often requires lenses with a specific focal length that match their existing prescription. However, for specialized glasses beyond regular myopia glasses, such as AR glasses and VR glasses, wearers often need to wear these glasses on top of their regular glasses, or they may require custom-made lenses with a specific focal length. This necessitates ordering multiple custom-made lenses for different users, and since each custom-made lens is only suitable for that specific user, its usability is limited.

[0034] With the continuous development of display technology, lenses that can achieve continuous adjustment of lens power have emerged. Currently, there are three main technical solutions that can achieve continuous adjustment of lens power: electrowetting liquid lenses, elastic film liquid lenses, and liquid crystal lenses.

[0035] Electrowetting liquid lenses are primarily based on the principle of electrowetting. By altering the wettability between the liquid and the lens wall through voltage, the radius of curvature of the high-refractive-index liquid is changed, thus altering the lens power. Furthermore, applying continuously varying voltages causes the radius of curvature of the high-refractive-index lens to change continuously, enabling continuous adjustment of the lens power. However, while electrowetting liquid lenses offer fast response times and are unaffected by gravity, they require high driving voltages, posing a risk of liquid electrolysis. Additionally, electrowetting lenses have small apertures, complex mechanical structures, large module sizes, and complex manufacturing processes, resulting in high costs.

[0036] The principle of an elastic film liquid lens is to first encapsulate a high-refractive-index liquid in an elastic film and design a mechanical structure for the film. By controlling the mechanical structure (such as controlling a motor) to generate external force to squeeze the film, the curvature at the center of the film changes accordingly, thus changing the lens power. Simultaneously, if the magnitude of the applied external force continuously changes, the radius of curvature at the center of the film also continuously changes, thereby achieving continuous adjustment of the lens power. However, although the elastic film liquid lens solution has a relatively fast response speed and a lower driving voltage for mechanical actuation, when the size is large, the elastic film is easily collapsed due to gravity, leading to optical path distortion. Furthermore, the mechanical structure is complex, the module size is large, the light transmission aperture is small, and the cost is high.

[0037] Liquid crystal lenses (LCDs) work by applying different voltages to different areas of the liquid crystal, controlling the arrangement of liquid crystal molecules in those areas, thereby altering the refractive index of the liquid crystal material and achieving a refractive index gradient distribution, ultimately simulating a lens effect. By appropriately changing the magnitude and distribution of the applied voltage, the lens power can be continuously changed. However, while LCDs offer high control precision and are unaffected by gravity, they suffer from low light transmittance, a small zoom range, and a slow response time.

[0038] This application provides a novel adjustable focal length and optical center lens module, capable of dynamically adjusting the lens's myopia prescription and pupillary distance. Light rays from all directions are deflected when passing through a lens, causing a change in their propagation direction. However, there is a point on the lens where the propagation direction of light rays from any direction remains unchanged when passing through this point; that is, the outgoing and incoming directions are parallel. This point is called the optical center of the lens. For example, for a concave lens, the optical center is usually the most concave position of the lens.

[0039] Please refer to Figure 1 This application provides a lens module, including a lens body 10 and a power supply circuit 20. The lens body 10 includes a flexible film 101 defining a cavity and a transparent liquid 102 contained within the cavity. The flexible film 101 is provided with an array of conductive blocks (e.g., ...). Figure 1 The black portion on the outer surface of the flexible film 101 shown in the diagram), the conductive block array includes a plurality of conductive blocks spaced apart from each other; power supply circuit 20 is used to provide a driving voltage to the conductive blocks in the conductive block array to change the curvature of the flexible film.

[0040] Optionally, the power supply circuit 20 can be a micro-circuit with processing functions integrated into the lens module, or it can be a circuit that receives external input voltage. The power supply circuit 20 can be connected to each conductive block in the conductive block array to provide a driving voltage to each conductive block, thereby changing the curvature of the flexible film. It should be noted that when the lens module is in a bent state, i.e., when the lens module has a certain curvature, the voltage is highest in the central region of the bend, and decreases with distance from the central region. A higher voltage corresponds to a greater deformation of the flexible film.

[0041] Optionally, the flexible film 101 can be made of materials such as polydimethylsiloxane (PDMS), polyethylene terephthalate (PET, commonly known as polyester resin), polycarbonate (PC, also known as PC plastic), or polymethyl methacrylate (PMMA, also known as acrylic or plexiglass). This application embodiment does not specifically limit the material of the flexible film. The cavity formed using the flexible film 101 can be square, circular, or any other arbitrary shape. This application embodiment also does not specifically limit the shape of the cavity. Furthermore, after forming the cavity using the flexible film 101, a conductive block array can be provided on all or part of the outer surface of the flexible film 101. In practical applications, the conductive block array can be provided on the outer surface of the flexible film 101 according to the actual use and application scenario of the lens module.

[0042] Optionally, the transparent liquid 102 contained in the cavity formed by the flexible film can be a transparent liquid with a high refractive index to achieve refractive power correction. For example, it can be dimethyl silicone oil, polyethylene glycol, etc. The specific type of transparent liquid 102 is not limited in the embodiments of this application, as long as it can achieve refractive power correction.

[0043] Specifically, as can be seen from the above analysis, when a certain driving voltage is applied to the conductive block array on the flexible film 101, the flexible film 101 will undergo a deformation of a certain curvature, forming a lens with a certain refractive power. Optionally, based on Figure 1 As shown in the structure, a symmetrical array of conductive blocks is provided on the outer surface of the flexible film 101. The power supply circuit 20 can provide a driving voltage for the upper and lower conductive block arrays. An attractive or repulsive force can be generated between two opposing conductive blocks in the upper and lower conductive block arrays. Under the action of the attractive or repulsive force, the upper and lower surfaces of the flexible film 101 are squeezed or expanded and deformed. Similarly, the transparent liquid 102 contained in the cavity formed by the flexible film 101 also undergoes structural changes with the deformation of the flexible film 101, thereby changing the refraction direction of the incident light and adjusting the focal length of the lens module.

[0044] Furthermore, the greater the driving voltage applied to the conductive blocks, the greater the attractive or repulsive force between the upper and lower conductive blocks, and the greater the deformation of the flexible film. Therefore, for a lens module with a certain curvature, the driving voltage corresponding to the conductive block at the center of the lens is the largest, while the driving voltage gradually decreases with distance from the center. In other words, the magnitude of the driving voltage corresponding to each conductive block in the conductive block array is related to the distance between the conductive block and the central region; optionally, the central region can be the central region of the lens or the optical center of the lens, which can be determined based on the user's actual interpupillary distance.

[0045] The lens module in this embodiment includes a lens body and a power supply circuit. The lens body includes a flexible thin film defining a cavity and a transparent liquid contained within the cavity. A conductive block array is disposed on the flexible thin film, and the conductive block array includes multiple conductive blocks spaced apart from each other. The power supply circuit provides a driving voltage to the conductive blocks in the conductive block array to change the curvature of the flexible thin film. Thus, as the voltage of each conductive block changes continuously, the curvature of the flexible thin film also changes continuously, thereby enabling continuous adjustment of the lens power. Furthermore, by applying a maximum or minimum voltage to a specific conductive block, the position of the optical center of the lens can be adjusted. Since the lens module in this embodiment changes the curvature of the flexible thin film by applying voltage to the conductive blocks on the flexible thin film, without requiring a complex mechanical structure, its lens structure is less complex than that of existing elastic film liquid lenses, and the light transmission aperture of this lens module is larger.

[0046] In one embodiment, such as Figure 2 As shown, the flexible film 101 includes a first flexible film 1011 and a second flexible film 1012; a first conductive block array is disposed on the surface of the first flexible film 1011, and a second conductive block array is disposed on the surface of the second flexible film 1012, and each conductive block in the first conductive block array and each conductive block in the second conductive block array are disposed opposite each other through a transparent liquid; the power supply circuit 20 is used to provide a first voltage to the first conductive block in the first conductive block array, and to provide a second voltage to the second conductive block in the second conductive block array opposite to the first conductive block, the second voltage may be the same as the first voltage, or it may be different from the first voltage.

[0047] Optionally, for Figure 2The lens module structure provided in this embodiment supplies a first voltage to the first conductive block in the first conductive block array on the first flexible film 1011 via a power supply circuit 20, and simultaneously supplies a second voltage, different from the first voltage, to the second conductive block opposite the first conductive block in the second conductive block array on the second flexible film 1012. This causes an electrostatic attraction to occur between the first conductive block array on the first flexible film 1011 and the second conductive block array on the second flexible film 1012. Under the influence of this electrostatic attraction, the first flexible film 1011 and the second flexible film 1012 attract each other, forming a concave lens. A schematic diagram of the concave lens module structure is shown below. Figure 3 As shown. Optionally, the first conductive block in the first conductive block array on the first flexible film 1011 and the second conductive block in the second conductive block array on the second flexible film 1012 opposite to the first conductive block form a pair of conductive blocks. One of them is supplied with a first voltage, and the other is supplied with a second voltage with the opposite polarity to the first voltage, so that the first conductive block and the second conductive block generate electrostatic attraction after being supplied with voltages of opposite polarity and attract each other.

[0048] The following will be about Figure 2 The working principle of the lens module structure provided in the embodiments is described in detail.

[0049] First, for the first conductive block array on the first flexible thin film 1011 and the second conductive block array on the second flexible thin film 1012, etching technology can be used to etch the conductive side of the flexible thin film to obtain a uniformly distributed conductive block array with multiple conductive blocks, such as... Figure 4 As shown; optionally, the etching process of the flexible thin film may include: obtaining a complete and conductive flexible thin film, pressing a dry film onto the surface of the flexible thin film, then performing exposure and development processes to etch out the designed circuits, performing film stripping and IR baking after etching, and finally performing a protective film coating process, thereby forming a flexible thin film with a conductive block array.

[0050] For the array of conductive blocks on this flexible thin film, each conductive block is connected to an independent wire, such as... Figure 5As shown, a power supply circuit can be connected through this wire to provide different driving voltages to each conductive block, thereby achieving precise control over the curvature of the lens module's film surface. Furthermore, the shape of the conductive block can be rectangular (specifically, it can also be square), and the side length of the rectangle can be in the range of 100-1000 μm; the spacing between two adjacent conductive blocks can be in the range of 10-200 μm. It should be noted that the shape, size, and spacing between the conductive blocks provided in this embodiment are only illustrative of a preferred embodiment and are not intended to specifically limit them. However, in practical applications, if the size of the conductive blocks or the spacing between them is too small, it may cause a significant increase in manufacturing difficulty and cost; while if the size of the conductive blocks or the spacing between them is too large, it is difficult to achieve accurate adjustment of the optical center, resulting in poor adjustment accuracy of the optical center.

[0051] Next, based on the above conductive block array structure, when realizing the curvature control of the lens module, the optical center of the lens module can be determined first. Here, the optical center of the lens module can be determined as the default optical center position, or the optical center of the lens module corresponding to the left and right eyes can be determined according to the interpupillary distance of the user's eyes.

[0052] After determining the optical center of the lens, the driving voltage of each conductive block in the conductive block array can be determined based on the optical center. Optionally, each conductive block in the conductive block array can be connected to the power supply circuit, and the voltage on each conductive block can be determined by dividing the conductive blocks in the conductive block array into multiple annular regions according to the optical center, and determining the voltage on the corresponding annular region according to the target refractive power.

[0053] Suppose we need to adjust the optical center of the lens module to the upper right corner area, such as... Figure 6 As shown, if the user's eyes have a target myopia degree, then the same or different driving voltages need to be applied to each conductive block in the conductive block array on the flexible film of the lens module. In an optional implementation, such as Figure 7 As shown, it can be based on the optical center of the target (e.g. Figure 6 (As shown in the image), determine the conductive blocks in the central region corresponding to the optical center; then, using this central region as the center, divide the remaining conductive blocks into multiple different annular regions, such as... Figure 7The system consists of ring-shaped regions of varying color intensity. Next, based on a preset correspondence, the driving voltage corresponding to each ring-shaped region corresponding to the target refractive power can be determined, thereby determining the driving voltage for each conductive block. This preset correspondence can include the relationship between different refractive powers and voltage sets, including the driving voltage of the central region and the driving voltages of each ring-shaped region sequentially outward from the central region. The closer to the central region, the greater the driving voltage of the conductive block. The target refractive power can be calculated from the target myopia or obtained from the correspondence between different myopia degrees and refractive powers.

[0054] After determining the driving voltage of each conductive block, the power supply circuit can apply corresponding voltages to the first conductive block in the first conductive block array on the first flexible film 1011 and the second conductive block in the second conductive block array on the second flexible film 1012 that is opposite to the first conductive block, respectively, according to the driving voltage of each conductive block. For example, a positive voltage can be applied to the first conductive block in the first conductive block array on the first flexible film 1011, and a negative voltage can be applied to the second conductive block in the second conductive block array on the second flexible film 1012.

[0055] At this point, the first flexible film 1011, the second flexible film 1012 of the lens module, and the high-refractive-index transparent liquid poured into the cavity formed by the flexible films can form a parallel plate capacitor structure, and the high-refractive-index transparent liquid is the electrolyte of the capacitor; according to the principle of electrostatic attraction, the charge in the conductive block and the electrical signal in the conductive block generate an electrostatic attraction f. e The electrostatic attraction (t) can be calculated using the following formula:

[0056]

[0057] Where ε0 is the vacuum permittivity, A is the area of ​​a conductive block, V(t) is the voltage of the electrical signal applied to the conductive block on the flexible film, and T is the area of ​​the conductive block. i T represents the total thickness of the flexible thin film (excluding the conductive block array on the flexible thin film) and the high-refractive-index transparent liquid. sc ε is the thickness of the conductive block array on the flexible thin film. i The combined relative permittivity ε is the permittivity of a flexible thin film and a transparent liquid with a high refractive index. sc is the relative permittivity of the conductive block array on the flexible thin film.

[0058] The above analysis shows that, all other things being equal, the higher the voltage, the stronger the electrostatic attraction. Therefore, the flexible film corresponding to the optical center region of the lens module exhibits the greatest degree of indentation, and the degree of indentation decreases with increasing distance from the optical center, as described above. Figure 3 As shown. Furthermore, based on the aforementioned formula for calculating electrostatic attraction, the required electrostatic attraction for each conductive block corresponding to a different refractive power can be determined according to the radius of curvature corresponding to that refractive power. Then, based on the required electrostatic attraction for each conductive block, the driving voltage for each conductive block corresponding to that refractive power can be determined. In this way, a preset correspondence relationship can be obtained, including the correspondence between different refractive powers and voltage sets. This voltage set includes the driving voltage of the central region corresponding to that refractive power and the driving voltages of each annular region sequentially outward from the central region.

[0059] In summary, the lens module provided in this application embodiment can adjust the optical center of the lens module by changing the position of the maximum voltage supplied to the conductive block array; it can also adjust the radius of curvature of the lens module diaphragm, i.e., adjust the degree of myopia, by adjusting the maximum voltage value supplied to the conductive block array.

[0060] In another optional implementation of this embodiment, for farsighted users, a first voltage can be provided to the first conductive block in the first conductive block array on the first flexible film 1011 via the power supply circuit 20, and a second voltage of the same value as the first voltage can be provided to the second conductive block opposite the first conductive block in the second conductive block array on the second flexible film 1012. This causes a mutual repulsive force to be generated between the first conductive block array on the first flexible film 1011 and the second conductive block array on the second flexible film 1012. Consequently, under the action of the mutual repulsive force, the first flexible film 1011 and the second flexible film 1012 repel each other, forming a protrusion, i.e., forming a convex lens. The structural schematic diagram of the lens module after the protrusion can be shown as follows. Figure 8 As shown. Optionally, the first conductive block in the first conductive block array on the first flexible film 1011 and the second conductive block opposite to the first conductive block in the second conductive block array on the second flexible film 1012 form a pair of conductive blocks. One of them is supplied with a first voltage, and the other is supplied with a second voltage of the same polarity as the first voltage, so that the first conductive block and the second conductive block generate a repulsive force after being supplied with the same voltage, and thus repel each other. Optionally, the first voltage and the second voltage can both be positive voltages or both be negative voltages.

[0061] Furthermore, when controlling the curvature of a hyperopic lens, the optical center of the hyperopic lens can be determined first. Then, based on the optical center, multiple annular regions can be divided. According to the hyperopic degree and the preset correspondence, the driving voltage corresponding to each annular region can be determined. Among them, the closer to the optical center, the greater the driving voltage of the conductive block, and the greater the mutual repulsion force generated by the first voltage and the second voltage of the same polarity.

[0062] In this embodiment, the flexible film includes a first flexible film and a second flexible film. A first conductive block array is disposed on the surface of the first flexible film, and a second conductive block array is disposed on the surface of the second flexible film. Each conductive block in the first conductive block array and each conductive block in the second conductive block array are positioned opposite each other through a transparent liquid. A power supply circuit provides a first voltage to the first conductive block in the first conductive block array on the first flexible film, and provides a second voltage to the second conductive block in the second conductive block array on the second flexible film opposite to the first conductive block. This second voltage is different from the first voltage. Through this lens module structure, continuous adjustment of myopia can be achieved. Furthermore, because the driving voltage of each conductive block can be precisely controlled, the curvature of the film (i.e., the flexible film) of the lens module can be precisely controlled, thus allowing for a very large visible area, thereby increasing the light transmission aperture of the lens module. Moreover, the lens module in this embodiment can also achieve active adjustment of the lens optical center without requiring additional mechanical structures, resulting in a thinner and lighter structure for the lens module.

[0063] In one embodiment, such as Figure 9 As shown, the lens body 10 also includes a support member 103. The first flexible film 1011 and the second flexible film 1012 are disposed opposite to each other across the support member 103. The first flexible film 1011, the second flexible film 1012 and the support member 103 surround each other to form a cavity.

[0064] Optionally, the support member 103 and the first flexible film 1011 and the second flexible film 1012 can be bonded together by welding or by adhesive bonding. The support member 103 can be made of at least one of PC or PMMA material, and its thickness can be between 1-4 mm. It should be noted that the thickness and material of the support member provided in this embodiment are only a preferred reference range and are not intended to limit the thickness and material of the support member.

[0065] In one embodiment, such as Figure 10 As shown, the lens module 10 also includes an elastic container 104, which communicates with the cavity through a through hole provided in the support member 103, for containing transparent liquid overflowing from the cavity, or for injecting transparent liquid into the cavity.

[0066] Optionally, the elastic container 104 can be an elastic spherical balloon or a container of any shape with an elastic structure; this embodiment does not limit this. The elastic container 104 can be filled with a transparent liquid with the same refractive index as the transparent liquid inside the cavity. The transparent liquid can flow between the elastic container 104 and the cavity through the through-hole provided in the support member 103. Optionally, Figure 10The initial state of the elastic container 104 shown can be the state corresponding to the lens module having no refractive power, i.e., when it is used as a plano lens. When the refractive power of the lens module is adjusted, if the lens module deforms into a concave lens, i.e., when used as a myopia lens, then the elastic container 104 can contain the transparent liquid overflowing from the cavity, and the elastic container 104 expands and becomes larger, such as... Figure 11 As shown; if the lens module is deformed into a convex lens, i.e., used as a farsighted lens, then the elastic container 104 can inject a transparent liquid into the cavity, and the elastic container 104 contracts and becomes smaller, such as Figure 12 As shown, the elastic container in this embodiment can adapt to different deformations of the lens module, realize the adjustment of different diopters of the lens module, and improve the diversity and reliability of the diopters adjustment of the lens module.

[0067] It should be noted that the initial state of the elastic container 104 can be the initial form corresponding to a refractive power of zero. At this time, the refractive power is zero, so there is no need to apply any voltage to the first conductive block array on the first flexible film and the second conductive block array on the second flexible film, and the first and second flexible films do not undergo any deformation. Of course, the initial state of the elastic container 104 can also be the form corresponding to a certain myopia state or a certain hyperopia state. For example, a lens module can be designed for a user with a specific refractive power, and the curvature of the lens module can be flexibly adjusted as the user's eye power changes during long-term use.

[0068] In one embodiment, both the first flexible film 1011 and the second flexible film 1012 are transparent films, and the conductive block array is disposed on the surface of the transparent film facing away from the transparent liquid, such as... Figure 2 or Figure 9 As shown, the first flexible film 1011 (gray area) is the transparent film, and the black area on the upper surface of the first flexible film 1011 (gray area) is the first conductive block array. Similarly, the second flexible film 1012 (gray area) is the transparent film, and the black area on the lower surface of the second flexible film 1012 (gray area) is the second conductive block array. According to the above description of the formation of the conductive block array, a conductive film deposited on the transparent film may be included. By etching the conductive film, the conductive block array disposed on the transparent film can be obtained. Optionally, the conductive film can be an indium tin oxide (ITO) film, and correspondingly, each conductive block in the conductive block array can be an indium tin oxide (ITO) conductive block.

[0069] Optionally, when the cavity is defined by the first flexible film 1011 and the second flexible film 1012, or when the cavity is formed by the first flexible film 1011, the second flexible film 1012 and the support member 103, the side surface on which the conductive block array is provided on the transparent film can be oriented outward. This can prevent the transparent liquid in the cavity from corroding the conductive block array and can also prevent leakage, thereby improving the safety of the lens module.

[0070] For example, the transparent film can be a PET film, the conductive film can be an ITO film, and the high-refractive-index transparent liquid injected into the cavity can be a polyethylene glycol (PEG200) solution; when the first flexible film 1011 and the second flexible film 1012 are supplied with voltages of opposite polarity by the power supply module 20, they indent inward, squeezing the transparent liquid in the cavity, so that excess transparent liquid is discharged into the elastic sac. A schematic diagram can be shown below. Figure 11 As shown; when the first flexible film 1011 and the second flexible film 1012 are supplied with voltages of the same polarity by the power supply module 20, they expand outward and draw in a certain amount of transparent liquid from the elastic container. A schematic diagram can be shown as follows. Figure 12 As shown.

[0071] In addition, the transparent film can also be made of materials such as PDMS, PET, PC or PMMA, and the thickness can be between 50-300μm. It should be noted that the thickness and material of the transparent film provided in this embodiment are only a preferred reference range and are not intended to limit the thickness and material of the transparent film.

[0072] In one embodiment, eyeglasses are also provided, comprising the lens module described in the above embodiments. Optionally, the eyeglasses can be ordinary vision correction eyeglasses, or VR eyeglasses, AR eyeglasses, MR eyeglasses, etc. This application does not limit the type of eyeglasses. The eyeglasses in this embodiment enable continuous adjustment of the lens power, and the lens structure of the eyeglasses has low complexity and a large light transmission aperture. For a detailed description of the lens module in these eyeglasses, please refer to the descriptions of the lens modules in the above embodiments; they will not be repeated here.

[0073] In one embodiment, such as Figure 13As shown, the glasses also include a first connector 301 and a waveguide lens 302. The waveguide lens 302 is stacked and connected to the lens module 303 through the first connector 301. That is to say, when the glasses are AR glasses, the lenses of the AR glasses can be AR lenses formed by stacking the waveguide lens 302 and the lens module 303. This allows the AR lenses to automatically and continuously adjust the myopia prescription, so that AR glasses users do not need to customize myopia lenses separately, and different users do not need to customize and replace special myopia lenses when using the same AR glasses. This allows the same AR glasses to be used by more users without replacing the lenses, resulting in a better user experience.

[0074] Optionally, the first connector 301 can be connected by a frame adhesive or by a mechanical structure; this application does not limit this. Preferably, the waveguide lens 302 and the lens module 303 can be connected by a frame adhesive. In addition, the lens module 303 can be located on the side closer to the user, which can both realize the function of vision correction and protect the waveguide lens.

[0075] In one embodiment, such as Figure 14 As shown, the glasses also include a second connector 304 and a protective lens 305. The protective lens 305 is stacked and connected to the side of the waveguide lens 302 facing away from the lens module 303 via the second connector 304. That is, the lens module 303 is attached to the inner side (i.e., the side closer to the user) of the waveguide lens 302, and the protective lens 305 is attached to the outer side (i.e., the side away from the user) of the waveguide lens 302, which protects the waveguide lens 302, reduces damage to the waveguide lens 302, and increases the service life of the waveguide lens 302. Optionally, the second connector 304 can be the same as or different from the first connector 301. Preferably, the outer protective lens 305 and the waveguide lens 302 are connected by frame adhesive, and the waveguide lens 302 and the lens module 303 are connected by frame adhesive, resulting in AR lenses used in AR glasses that have continuously adjustable myopia prescription and adjustable optical center, realizing dynamic adjustment of myopia prescription and pupillary distance.

[0076] In one embodiment, the glasses may further include a controller coupled to the lens module for determining the driving voltage of each conductive block in the conductive block array on the lens module according to the target refractive power; and providing a corresponding driving voltage to each conductive block to change the curvature of the flexible film of the lens module.

[0077] Optionally, the target refractive power can be input by the user, or it can be determined by the user-inputted myopia or hyperopia. The user input can be via input components on the lens module, such as buttons, knobs, or touchscreens; or via other input components that are wired / wireless connected to the lens module, such as input components on AR glasses that communicate with the lens module, or input components on a remote control device that communicates with the lens module. This application does not specifically limit the method of obtaining the target refractive power in this embodiment.

[0078] Specifically, after determining the target refractive power, the controller can determine the driving voltage of each conductive block in the conductive block array on the lens module based on the target refractive power. Optionally, a correspondence between different refractive powers and the driving voltages of different conductive blocks in the conductive block array can be preset. This correspondence can be stored in the controller or in other devices that are communicatively connected to the lens module. Then, the controller can determine the driving voltage of each conductive block in the conductive block array corresponding to the target refractive power based on the target refractive power and the preset correspondence. When the preset correspondence is stored in the controller, the controller can directly query the driving voltage of each conductive block in the conductive block array corresponding to the target refractive power based on the preset correspondence. When the preset correspondence is stored in other devices that are communicatively connected to the lens module, the controller can send the target refractive power to the other device and instruct the other device to determine the driving voltage of each conductive block in the conductive block array corresponding to the target refractive power based on the target refractive power and the preset correspondence, and send it to the controller of the lens module.

[0079] The above analysis of the working principle of the lens module shows that when the power supply circuit provides the corresponding driving voltage to each conductive block according to the driving voltage of each conductive block, each conductive block generates electrostatic attraction or mutual repulsion under the action of the driving voltage, which causes the flexible film to deform. The deformed flexible film has a curvature corresponding to the target refractive power, which is used to match the user's myopia degree and realize the adjustment of the lens module's power.

[0080] Optionally, after determining the first voltage magnitude of the first conductive block in the first conductive block array on the first flexible film in the lens module, and determining the second voltage magnitude of the second conductive block in the second conductive block array on the second flexible film, the controller can also control the voltage polarity of the first conductive block in the first conductive block array and the voltage polarity of the second conductive block in the second conductive block array according to the type of the target refractive power; wherein, the type of the target refractive power may include myopia and hyperopia.

[0081] Optionally, the controller is further configured to, when the target refractive power is myopia, control the voltage polarity of the first conductive block in the first conductive block array on the first flexible film to be opposite to the voltage polarity of the second conductive block in the second conductive block array on the second flexible film; at this time, an electrostatic attraction is generated between the first conductive block in the first conductive block array on the first flexible film and the second conductive block in the second conductive block array on the second flexible film opposite to the first conductive block, causing the first flexible film and the second flexible film to be concave inward to form a concave lens with a certain curvature to match the myopia.

[0082] Optionally, the controller is further configured to, when the target refractive power is hyperopia, control the voltage polarity of the first conductive block in the first conductive block array on the first flexible film to be the same as the voltage polarity of the second conductive block in the second conductive block array on the second flexible film; at this time, a mutual repulsive force is generated between the first conductive block in the first conductive block array on the first flexible film and the second conductive block in the second conductive block array on the second flexible film opposite to the first conductive block, causing the first flexible film and the second flexible film to expand outward to form a convex lens with a certain curvature to match the hyperopia.

[0083] In this embodiment, the controller determines the driving voltage of each conductive block in the conductive block array on the lens module according to the target refractive power, and provides the corresponding driving voltage to each conductive block to change the curvature of the flexible film of the lens module. This enables continuous adjustment of the lens module's power, thereby improving the intelligence and flexibility of the lens module. In addition, since the lens module has a low structural complexity and a simple control principle, it is easy to control and maintain, which can reduce the maintenance cost of the lens module.

[0084] In one embodiment, when the controller determines the driving voltage of each conductive block in the conductive block array on the lens module according to the target refractive power, the controller may optionally divide the conductive blocks in the conductive block array into multiple annular regions according to the optical center, and determine the voltage on each annular region according to the target refractive power, so as to determine the driving voltage of each conductive block in each annular region.

[0085] The optical center of a lens refers to the point where the direction of light propagation remains unchanged when light passes through the lens. Optionally, the optical center can be a preset default position, a user-input optical center position, or an optical center position determined based on the user's input pupillary distance. In this embodiment, the method of determining the optical center is not specifically limited, nor is the method of user input.

[0086] Optionally, after determining the optical center, the controller can first determine the central conductive block in the conductive block array corresponding to the optical center, and then determine multiple annular regions with the central conductive block as the center; optionally, the central conductive block can be a single conductive block corresponding to the optical center, or it can be multiple conductive blocks corresponding to the optical center, such as... Figure 7 The diagram shows four conductive blocks corresponding to the region with the highest voltage. Of course, the central conductive block could also be nine conductive blocks corresponding to the optical center, or similarly. It should be noted that the number of central conductive blocks can be determined based on the position and size of the optical center and the size of the conductive blocks; the smaller the size of the conductive blocks, the more central conductive blocks are required.

[0087] Furthermore, for the multiple annular regions centered on the central conductive block, the shape of these annular regions can be circular, elliptical, or square, etc., and the width of each annular region can be the width of one conductive block or the width of multiple conductive blocks, such as... Figure 7 The width of the annular region shown is the width of two conductive blocks. This application does not specifically limit the shape and width of the annular region, and in practical applications, the width of an annular region can be related to the size of the conductive blocks. Furthermore, the smaller the width of the annular region, the more precise the voltage control, the smoother the resulting surface, and the better the diopter control effect of the lens module.

[0088] Furthermore, after determining multiple annular regions centered on the optical center, the controller can determine the voltage on each annular region based on the target refractive power, thereby determining the driving voltage of each conductive block in each annular region.

[0089] Optionally, a pre-defined correspondence between different refractive powers and the voltages of different annular regions can be established. The closer to the center region, the higher the voltage; alternatively, the closer to the center region, the lower the voltage. In other words, the voltage in each annular region is negatively or positively correlated with the distance between the annular region and the optical center. Based on this pre-defined correspondence, the voltage in each annular region corresponding to the target refractive power can be determined, thereby determining the driving voltage of each conductive block in each annular region.

[0090] Furthermore, the voltage polarity of the first conductive block in the first conductive block array on the first thin film and the voltage polarity of the second conductive block opposite to the first conductive block in the second conductive block array on the second thin film can be determined based on the correspondence between the target refractive power and the voltage of different annular regions, and finally the driving voltage of each conductive block can be determined.

[0091] Optionally, if the voltage on each annular region is negatively correlated with distance (i.e., the closer to the center region, the greater the voltage), then, when the target refractive power is myopia, the controller controls the voltage polarity of the first conductive block in the first conductive block array on the first flexible film to be opposite to the voltage polarity of the second conductive block in the second conductive block array on the second flexible film; when the target refractive power is hyperopia, the controller controls the voltage polarity of the first conductive block in the first conductive block array on the first flexible film to be the same as the voltage polarity of the second conductive block in the second conductive block array on the second flexible film; optionally, voltages of the same polarity can both be positive voltages or both be negative voltages.

[0092] If the voltage in each annular region is positively correlated with distance (i.e., the closer to the center region, the smaller the voltage), then, when the target refractive power is myopia, the controller controls the voltage polarity of the first conductive block in the first conductive block array on the first flexible film to be the same as the voltage polarity of the second conductive block in the second conductive block array on the second flexible film opposite to the first conductive block; optionally, the voltages of the same polarity can both be positive voltages or both be negative voltages; when the target refractive power is hyperopia, the controller controls the voltage polarity of the first conductive block in the first conductive block array on the first flexible film to be opposite to the voltage polarity of the second conductive block in the second conductive block array on the second flexible film opposite to the first conductive block.

[0093] Furthermore, when energizing the first conductive block in the first conductive block array and the second conductive block in the first conductive block array opposite to the first conductive block, all the first conductive blocks in the first conductive block array can be energized, or only a portion of the first conductive blocks in the first conductive block array can be energized; correspondingly, the same applies to the second conductive block array; that is, only a portion of the first and second conductive blocks around the optical center can be energized to achieve curvature adjustment of the lens module, that is, for the controller, the controller can energize the first conductive blocks whose distance from the optical center is less than a preset first distance threshold.

[0094] In this embodiment, the controller divides the conductive blocks in the conductive block array into multiple annular regions based on the optical center, and determines the voltage on each annular region according to the target refractive power, thereby determining the driving voltage of each conductive block in each annular region. This allows for not only free adjustment of the optical center of the lens module, but also precise control of the curvature of the lens module by matching the adjusted optical center, achieving dynamic and continuous adjustment of the lens module's refractive power and pupillary distance, thus improving the intelligence and multifunctionality of the lens module. Furthermore, in this embodiment, the lens module does not require additional mechanical structures for active adjustment of the lens's optical center, resulting in a thinner and lighter structure and more convenient adjustment of the optical center.

[0095] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0096] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A lens module, characterized in that, include: The lens body includes a flexible film defining a cavity and a transparent liquid contained inside the cavity. The flexible film is provided with a conductive block array, which includes a plurality of conductive blocks spaced apart from each other. and, power supply circuit; Each conductive block is connected to the power supply circuit via an independent wire; The power supply circuit determines the driving voltage of each conductive block corresponding to the target refractive power based on the target refractive power and the distance between each conductive block and the optical center of the lens module. It also provides the maximum driving voltage to the conductive block closest to the optical center and sequentially decreases the driving voltage to multiple annular regions as the distance increases, thereby generating attractive or repulsive forces between the conductive blocks. Under the action of these forces, the upper and lower surfaces of the flexible film are compressed or expanded, causing deformation and changing the curvature of the flexible film. The optical center is determined based on the user's interpupillary distance. The power supply circuit is also used to adjust the optical center of the lens module by changing the position of the maximum voltage supplied to the conductive block array.

2. The lens module according to claim 1, characterized in that, The flexible film includes a first flexible film and a second flexible film. A first conductive block array is disposed on the surface of the first flexible film, and a second conductive block array is disposed on the surface of the second flexible film. Each conductive block in the first conductive block array and each conductive block in the second conductive block array are disposed opposite to each other through the transparent liquid. The power supply circuit is used to provide a first voltage to a first conductive block in the first conductive block array, and to provide a second voltage to a second conductive block in the second conductive block array opposite to the first conductive block, wherein the second voltage is different from the first voltage.

3. The lens module according to claim 2, characterized in that, The lens body also includes a support member, and the first flexible film and the second flexible film are disposed opposite each other across the support member, and the first flexible film, the second flexible film and the support member surround to form the cavity.

4. The lens module according to claim 3, characterized in that, The lens module also includes an elastic container, which communicates with the cavity through a through hole provided in the support member, for containing transparent liquid overflowing from the cavity, or for injecting transparent liquid into the cavity.

5. The lens module according to claim 3 or 4, characterized in that, The thickness of the support is between 1 and 4 mm; the material of the support includes at least one of polycarbonate and polymethyl methacrylate.

6. The lens module according to any one of claims 2 to 4, characterized in that, Both the first flexible film and the second flexible film are transparent films, and the conductive block array is disposed on the surface of the transparent film facing away from the transparent liquid.

7. The lens module according to claim 6, characterized in that, The thickness of the transparent film is between 50 and 300 μm; the material of the transparent film includes at least one of polydimethylsiloxane, polyethylene terephthalate, polycarbonate and polymethyl methacrylate.

8. The lens module according to any one of claims 1 to 4, characterized in that, The conductive block is an indium tin oxide (ITO) conductive block.

9. The lens module according to any one of claims 1 to 4, characterized in that, Each of the conductive blocks is rectangular, and the side length of the rectangle is in the range of 100-1000μm; the spacing between two adjacent conductive blocks is in the range of 10-200μm.

10. A pair of eyeglasses, characterized in that, The eyeglasses include a lens module as described in any one of claims 1 to 9.

11. The eyeglasses according to claim 10, characterized in that, The glasses also include a first connector and an optical waveguide lens, wherein the optical waveguide lens is stacked and connected to the lens module through the first connector.

12. The eyeglasses according to claim 11, characterized in that, The glasses also include a second connector and a protective lens, and the side of the optical waveguide lens facing away from the lens module is connected to the protective lens in a stacked manner through the second connector.

13. The eyeglasses according to any one of claims 10 to 12, characterized in that, The glasses also include a controller, which is coupled to the lens module; The controller is used to determine the driving voltage of each conductive block in the conductive block array on the lens module according to the target refractive power; and to provide a corresponding driving voltage to each conductive block to change the curvature of the flexible film of the lens module.

14. The eyeglasses according to claim 13, characterized in that, The controller is also configured to divide the conductive blocks in the conductive block array into multiple annular regions according to the optical center; and to determine the voltage on each annular region according to the target refractive power, so as to determine the driving voltage of each conductive block in each annular region.

15. The eyeglasses according to claim 14, characterized in that, The voltage on the conductive blocks in each of the annular regions is negatively or positively correlated with the distance; the distance is the distance between the annular region and the optical center.

16. The eyeglasses according to claim 14, characterized in that, The controller is used to control the voltage polarity of the first conductive block in the first conductive block array on the first flexible film to be opposite to the voltage polarity of the second conductive block in the second conductive block array on the second flexible film when the target refractive power is myopia; the distance between the first conductive block and the optical center is less than a preset first distance threshold.

17. The eyeglasses according to claim 14, characterized in that, The controller is used to control the voltage polarity of the first conductive block in the first conductive block array on the first flexible film to be the same as the voltage polarity of the second conductive block in the second conductive block array on the second flexible film opposite to the first conductive block when the target refractive power is hyperopia; the distance between the first conductive block and the optical center is less than a preset second distance threshold.

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