Contact lenses

Abstract

To provide a contact lens comprising a lens body, an electronic component, and a circuit structure.SOLUTION: A lens body includes an optical part and an annular wearing part surrounding the optical part. The annular wearing part has a layout area with a C-shape and a lower eyelid area between both ends of the layout area. The electronic component is embedded in the lower eyelid area. The circuit structure is embedded in the annular wearing part. The annular wearing part has a plurality of positioning grooves recessed from a surface of the annular wearing part toward the circuit structure. A bottom side of each of the positioning grooves includes a part of the circuit structure so as to expose the part of the circuit structure. A total sum of opening areas of the plurality of positioning grooves is equal to or less than 1% of a total sum of surface areas of a front face and a rear face.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to contact lenses, and more particularly to smart contact lenses. [Background technology]

[0002] Conventional smart contact lenses have embedded circuit structures within them, but the specific location of the circuit structures is difficult to position with high precision, making it difficult to maintain high consistency when mass-producing conventional smart contact lenses.

[0003] Therefore, the inventors of the present invention have realized that the above-mentioned problems can be improved, and as a result of conducting extensive research and applying scientific theory, have arrived at the present invention as a method that is rational in design and can effectively improve the above-mentioned problems. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention provides a contact lens that effectively improves upon the problems with conventional smart contact lenses. [Means for solving the problem]

[0005] One embodiment of the present invention provides a contact lens comprising a lens body, an electronic component, and a circuit structure. The lens body includes an optical portion and an annular mounting portion surrounding the optical portion, the annular mounting portion including a C-shaped layout area and a lower eyelid area between both ends of the layout area. The electronic component is embedded in the lower eyelid area of ​​the annular mounting portion. The circuit structure is embedded in the annular mounting portion and electrically connected to the electronic component. The lens body includes a posterior surface having a predetermined curvature suitable for attachment to a user's eye and a front surface opposite the posterior surface. The annular mounting portion has a plurality of positioning grooves recessed from at least one of the front and rear surfaces toward the circuit structure, and the bottom side of each positioning groove includes a portion of the circuit structure so that a portion of the circuit structure is exposed. The total opening area of ​​the plurality of positioning grooves is 1% or less of the total surface area of ​​the front surface and the rear surface. [Effects of the Invention]

[0006] As described above, in the contact lens according to the embodiment of the present invention, when the structure of the annular mounting part is designed, a plurality of positioning grooves are reserved to realize high-precision positioning of the circuit structure (and the electronic components) during the manufacturing process of the contact lens, thereby maintaining high consistency when mass-producing the contact lens. More specifically, the plurality of positioning grooves are controlled within a certain ratio range to avoid excessively affecting the strength of the contact lens. Furthermore, the portions of the circuit structure are exposed from the corresponding positioning grooves to enhance the heat dissipation effect of the circuit structure. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a schematic three-dimensional view showing a contact lens according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a schematic top view of FIG. [Figure 3] 2 is a schematic plan view of the contact lens shown in FIG. 1 being attached to the user's eye. FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 5 is an enlarged schematic view of a portion V in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 7 is an enlarged schematic view of part VII in FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. [Figure 9] FIG. 9 is an enlarged schematic view of part IX in FIG. 8. [Figure 10] FIG. 2 is a schematic top view showing a contact lens according to a second embodiment of the present invention. [Figure 11] FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. [Figure 12] FIG. 2 is a schematic three-dimensional view showing a contact lens according to a third embodiment of the present invention. [Figure 13] FIG. 13 is a schematic top view of FIG. [Figure 14] FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG. [Figure 15] FIG. 13 is a cross-sectional view taken along line XV-XV in FIG. [Figure 16] FIG. 16 is an enlarged schematic view of a portion XVI in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] In order to better understand the characteristics and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the provided description and drawings are only for explaining the present invention and do not limit the protection scope of the present invention.

[0009] The "contact lenses" according to the embodiments of the present invention will be described below with reference to certain specific embodiments, and those skilled in the art will be able to understand the advantages and effects of the present invention based on the contents disclosed herein. The present invention can be implemented or applied in other different specific embodiments, and various modifications and changes can be made to the details herein based on different perspectives and applications without departing from the concept of the present invention. Also, as previously explained, the accompanying drawings of the present invention are for simple schematic illustrations and are not drawn to actual size. The technical contents of the present invention will be described in more detail based on the following embodiments, but the disclosed contents do not limit the scope of protection of the present invention.

[0010] It should be understood that although the present specification may use terms such as "first," "second," and "third" to describe various elements or signals, these elements or signals are not limited by these terms. These terms are primarily used to distinguish one element from another element or one signal from another signal. Furthermore, the term "or" used in the present specification may include any one or more combinations of the associated listed items, depending on the actual situation.

[0011] [First embodiment] 1 to 9 show a first embodiment of the present invention. As shown in FIGS. 1 to 4, this embodiment discloses a contact lens 100 (also referred to as a smart contact lens). The contact lens 100 can be placed on a user's eye 200 (e.g., FIG. 3) or implanted within the eye 200 (not shown in the drawings), depending on design needs.

[0012] The contact lens 100 according to this embodiment may have a function to correct refractive errors, including hyperopia, myopia, astigmatism, presbyopia, or astigmatism-presbyopia, or the contact lens 100 may be a makeup lens without a corrective function.

[0013] The contact lens 100 according to this embodiment includes a lens body 1, an electronic component 2 embedded in the lens body 1, and a circuit structure 3 embedded in the lens body 1 and electrically connected to the electronic component 2, but the present invention is not limited thereto. For example, in other embodiments not shown in the drawings of the present invention, the contact lens 100 may include only the lens body 1 and the circuit structure 3, omitting the electronic component 2, depending on design needs. Below, each component of the contact lens 100 according to this embodiment will be described in order, and the connection relationships between the multiple components will be described.

[0014] The lens body 1 according to this embodiment is formed by hardening hydrogel or silicone hydrogel, and the hydrogel is, for example, p-HEMA, but the present invention is not limited thereto. Here, the lens body 1 includes an optical portion 11 and an annular mounting portion 12 surrounding the optical portion 11. The optical portion 11 may or may not have a function for correcting refractive error according to design requirements. It should be noted that, although no element is embedded in the optical portion 11 in this embodiment, elements may be embedded in the optical portion 11 according to design requirements (for example, when the contact lens 100 is applied to a digital zoom device), and the present invention is not limited to the above description of this embodiment.

[0015] A central axis L is defined in the optical portion 11, and the centers of the optical portion 11 and the annular mounting portion 12 are both positioned on the central axis L. The annular mounting portion 12 is connected to the outer edge of the optical portion 11 and has a substantially circular ring shape. The electronic components 2 and the circuit structure 3 are embedded inside the annular mounting portion 12. The manufacturing method for embedding the electronic components 2 and the circuit structure 3 in the annular mounting portion 12 (or the manufacturing method for the contact lens 100) may be adjusted or changed according to design requirements, and the present invention is not limited thereto.

[0016] More specifically, the annular mounting portion 12 includes a C-shaped layout area 121 and a lower eyelid area 122 located between both ends of the layout area 121. The electronic component 2 is embedded in the lower eyelid area 122. When the contact lens 100 is worn on the eye 200, the positions of the lower eyelid area 122 and the electronic component 2 correspond to the lower eyelid 201, which is relatively less sensitive, of the eye 200, thereby effectively reducing the foreign body sensation felt by the user.

[0017] 2 to 5, the surface of the lens body 1 includes a rear surface 1b and a front surface 1a opposite to the rear surface 1b. Here, the rear surface 1b has a predetermined curvature, so that it is suitable for being worn on the eye 200 of the user. That is, the predetermined curvature is related only to the eye 200.

[0018] The front surface 1a includes a visible surface 11a corresponding to the optical portion 11 and a free-form surface 12a corresponding to the annular mounting portion 12, and the visible surface 11a has a first curvature related to an optical design required to correct the refractive error. Alternatively, the first curvature of the visible surface 11a and the back surface 1b may together form a no-prescription structure.

[0019] To further explain, the first curvature of the visible surface 11a is different from the second curvature of the free-form surface 12a, so that the thickness distribution of the annular mounting portion 12 gradually increases toward the electronic component 2 (e.g., the lower eyelid area 122), but the present invention is not limited thereto. For example, in another embodiment not shown in the drawings of the present invention, the first curvature is substantially the same as the second curvature, and the thickness of the annular mounting portion 12 is substantially uniform.

[0020] In other words, the contact lens 100 may have at least one electronic component 2 embedded at any location in the annular mounting portion 12 according to design requirements. For example, in another embodiment not shown in the drawings of the present invention, at least one electronic component 2 is embedded on both horizontal sides of the annular mounting portion 12, so that the thickness of the annular mounting portion 12 is thickest in the horizontal direction of the eye and gradually decreases in the vertical direction of the eye. In this way, this mounting method can accommodate at least two electronic components 2 and reduce the foreign body sensation when wearing the contact lens 100.

[0021] As described above, in the contact lens 100 according to the embodiment of the present invention, the free-form surface 12a is formed on the front surface 1a of the lens body 1, so that the thickness of the layout area 121 does not need to completely correspond to the lower eyelid area 122, thereby realizing a thinner layout area 121, effectively improving the oxygen permeability of the layout area 121, and reducing the foreign body sensation when wearing the contact lens 100.

[0022] In order to effectively improve the oxygen permeability of the layout area 121 and reduce the foreign body sensation when wearing the contact lens 100, it is preferable that the contact lens 100 is adjusted by the second curvature of the free-form surface 12a so as to satisfy at least one of the multiple characteristics described in the following two paragraphs, but the present invention is not limited thereto.

[0023] The maximum thickness Tmax of the annular mounting portion 12 (the portion where the component is embedded) is in the area where the electronic component 2 is arranged (for example, the lower eyelid area 122). Also, the minimum thickness Tmin of the annular mounting portion 12 (the portion where the component is embedded) is in a portion of the layout area 121 away from the lower eyelid area 122 (for example, an upper portion of the layout area 121 shown in FIG. 4). That is, when the contact lens is attached to the eye 200, the portion of the annular mounting portion 12 where the component is embedded and where the annular mounting portion 12 has the maximum thickness Tmax corresponds to the lower eyelid 201 of the eye 200, and the portion of the annular mounting portion 12 where the component is embedded and where the annular mounting portion 12 has the minimum thickness Tmin corresponds to the upper eyelid 202 of the eye 200. In this embodiment, the maximum thickness Tmax and minimum thickness Tmin correspond to the user's lower eyelid and upper eyelid, respectively, but in the present invention, the relative positional relationship between the thickness of the contact lens 100 and the user's eyelid is not limited to this.

[0024] In the lower eyelid area 122, there is a distance D122 between the circuit structure 3 and the rear surface 1b. The distance D122 is greater than the distance D121 between the circuit structure 3 and the rear surface 1b in the layout area 121.

[0025] The circuit structure 3 may exist alone in the lens body 1 (not shown in the drawings) or in combination with the electronic components 2, and the circuit structure 3 (and the electronic components 2) may perform at least one of multiple functions such as energy reception, wireless signal transmission, digital calculation, sensing and monitoring, pressure application, current release, image projection, optical zoom, and power storage through electrical or physical driving, but the present invention is not limited thereto.

[0026] In this embodiment, the circuit structure 3 includes a carrier 31 and a circuit 32 (e.g., a metal circuit) formed on the carrier 31, and the circuit 32 is electrically connected to the electronic component 2. In this embodiment, the carrier 31 is formed into a predetermined curved structure by cold pressing or hot pressing a mold. As a result, the carrier 31 has a formed curvature different from the second curvature, and the formed curvature is preferably close to the predetermined curvature of the rear surface 1b (e.g., the formed curvature is 100% to 110% of the predetermined curvature), but the present invention is not limited thereto.

[0027] Here, in this embodiment, the carrier 31 is described as a flexible printed circuit board (FPCB) having a thickness of 10 μm to 300 μm. The thickness of the carrier 31 is preferably 40 μm to 80 μm. The polymer material contained in the carrier 31 may be polyimide (PI), liquid crystal polymer (LCP), polyethylene terephthalate (PET), or polyethylene naphthalate (Poly(ethylene 2,6-naphthalene dicarboxylate) (PEN), but the present invention is not limited thereto.

[0028] More specifically, the carrier 31 includes a C-shaped segment 311 embedded in the layout area 121 and a connecting segment 312 embedded in the lower eyelid area 122, and the connecting segment 312 is connected between two end edges of the C-shaped segment 311. Here, the electronic component 2 may be attached to the connecting segment 312. The circuit 32 is formed on the C-shaped segment 311 so as to extend to the connecting segment 312 and connect to the electronic component 2.

[0029] In addition, since wrinkles or stress concentration easily occur during the press molding process, at least one void 3111 is formed in the C-shaped segment 311 of the carrier 31, and the at least one void 3111 is filled with the lens body 1. It is noteworthy that in the top view of the contact lens 100 (along the central axis L), the area of ​​the at least one void 3111 should be 1% to 85% (preferably 10% to 40%) of the area surrounded by the outer contour of the C-shaped segment 311, which can effectively reduce wrinkles or stress concentration of the carrier 31 and, in combination with the free-form surface 12a, further improve the oxygen permeability of the contact lens 100.

[0030] Furthermore, by forming a plurality of radial notches 313 in the carrier 31 from its outer edge toward the central axis L, it is possible to further reduce wrinkles or stress concentration in the carrier 31. Here, the plurality of radial notches 313 in this embodiment are each formed at the boundary between the C-shaped segment 311 and the connecting segment 312, but the present invention is not limited to this.

[0031] In the top view of the contact lens 100, the area of ​​the at least one void 3111 is 1% to 75% of the area of ​​the annular mounting portion 12, and in this embodiment, the number of the at least one void 3111 formed in the C-shaped segment 311 is described as being plural, but the present invention is not limited thereto. For example, in other embodiments not shown in the drawings of the present invention, the void 3111 may not be formed in the C-shaped segment 311 of the carrier 31.

[0032] In this embodiment, the circuit 32 has at least one enclosed closed circuit, and the plurality of voids 3111 of the C-shaped segment 311 are located in at least one closed circuit of the circuit 32. It should be noted that in this embodiment, the number of at least one closed circuit is plural, and the plurality of voids 3111 are respectively located in the plurality of closed circuits of the circuit 32, but the present invention is not limited thereto.

[0033] Here, each of the voids 3111 has a curved shape, and the width of any of the voids 3111 gradually increases from both ends toward the center (for example, the voids 3111 in this embodiment have a roughly crescent shape). More specifically, any of the voids 3111 has an inner hole edge 3112 and an outer hole edge 3113, and both ends of the inner hole edge 3112 are connected to both ends of the outer hole edge 3113, respectively, thereby forming the both ends of at least one of the voids 3111.

[0034] Here, the inner hole edge 3112 and the outer hole edge 3113 are both arc-shaped, and the radius of the inner hole edge 3112 is smaller than the radius of the outer hole edge 3113. The centers of the inner hole edge 3112 and the outer hole edge 3113 are located on two different planes perpendicular to the central axis L. That is, the void 3111 in this embodiment is not planar, but is arranged along the molding curvature of the carrier 31.

[0035] In order to define the distribution of the multiple voids 3111 in more detail, in the top view of the contact lens 100, the central axis L is taken as the starting point, and based on this starting point, the X-axis and Y-axis intersect perpendicularly to the starting point, and the contact lens is divided counterclockwise into a first quadrant Q1, a second quadrant Q2, a third quadrant Q3, and a fourth quadrant Q4.

[0036] In the top view of the contact lens 100, the lower eyelid area 122 is located in the third quadrant Q3 and the fourth quadrant Q4. The Y axis is approximately the center line of the lower eyelid area 122. The lower eyelid area 122 corresponds to a central angle σ122 of the starting point. The central angle σ122 is preferably 30 degrees to 180 degrees, and may be set according to design requirements, but the present invention is not limited thereto.

[0037] In the top view of the contact lens 100, the plurality of voids 3111 are distributed in the first quadrant Q1, the second quadrant Q2, the third quadrant Q3, and the fourth quadrant Q4. Furthermore, among the plurality of voids 3111 distributed in the first quadrant Q1, the second quadrant Q2, the third quadrant Q3, and the fourth quadrant Q4, when a void 3111 straddles different quadrants, the area difference between any two portions of the void 3111 located in different quadrants is 50% or less.

[0038] More specifically, in the top view of the contact lens 100, any of the voids 3111 straddles at least two quadrants (for example, any of the voids 3111 straddles the first quadrant Q1 and the fourth quadrant Q4, or straddles the second quadrant Q2 and the third quadrant Q3). Any of the voids 3111 may be mirror-symmetric with respect to the X-axis, but the present invention is not limited thereto.

[0039] The plurality of voids 3111 include at least one first void 3111a and at least one second void 3111b. Although the present embodiment has been described as including a plurality of the at least one first void 3111a and at least one second void 3111b, the present invention is not limited thereto. Here, the plurality of first voids 3111a are located inside the plurality of second voids 3111b, respectively, i.e., the radius of each of the second voids 3111b is different from the radius of any of the first voids 3111a (for example, larger than the radius of the first void 3111a).

[0040] In this embodiment, each of the first voids 3111a has an arc shape, its center is located on the central axis L, and the plurality of first voids 3111a are arranged with spaces between them. Each of the second voids 3111b has an arc shape, its center is located on the central axis L, and the plurality of second voids 3111b are arranged with spaces between them.

[0041] Any one of the first voids 3111a is located within the range of the central angle corresponding to the second void 3111b. In addition, the gap between any two adjacent first voids 3111a and the gap between any two adjacent second voids 3111b are located in the same radial direction of the contact lens 100.

[0042] 2, 4, and 6, the annular mounting part 12 has a plurality of positioning grooves 123 formed to be recessed from at least one of the front surface 1a and the rear surface 1b toward the circuit structure 3, and the bottom side of each of the positioning grooves 123 includes a portion of the circuit structure 3, thereby exposing the portion of the circuit structure 3. In other words, a contact lens in which the positioning grooves are not formed does not correspond to the contact lens 100 according to this embodiment. The number of positioning grooves 123 is at least four, and a central axis L is defined in the optical part 11. In a top view of the contact lens 100, starting from the central axis L, the contact lens 100 is divided counterclockwise into a first quadrant Q1, a second quadrant Q2, a third quadrant Q3, and a fourth quadrant Q4, so that at least one positioning groove 123 exists in each of the first quadrant Q1, the second quadrant Q2, the third quadrant Q3, and the fourth quadrant Q4.

[0043] More specifically, when the circuit structure 3 (and the electronic components 2) is placed in a molding die (not shown in the drawings), a plurality of positioning structures of the molding die abut against the portions of the circuit structure 3, thereby accurately positioning the circuit structure 3 (and the electronic components 2) at predetermined positions. Hydrogel or silicone hydrogel is then injected into the molding die to form a lens body 1 for covering the circuit structure 3 (and the electronic components 2). After the contact lens 100 is removed from the molding die, a plurality of positioning grooves 123 are formed in the lens body 1 at locations that cover the plurality of positioning structures.

[0044] As described above, in the contact lens 100 according to the embodiment of the present invention, the structure of the annular mounting part 12 is designed to reserve the positioning grooves 123 to achieve high-precision positioning of the circuit structure 3 (and the electronic component 2) during the manufacturing process of the contact lens 100, thereby maintaining high consistency when mass-producing the contact lens 100.

[0045] Here, the plurality of positioning grooves 123 are controlled within a certain ratio range (for example, the total opening area of ​​the plurality of positioning grooves 123 is 1% or less of the total surface area of ​​the front surface 1a and the rear surface 1b), thereby avoiding excessive influence on the strength of the contact lens 100. In addition, the portion of the circuit structure 3 is exposed from the corresponding positioning groove 123 in order to enhance the heat dissipation effect of the circuit structure 3.

[0046] 4 to 9, in this embodiment, the plurality of positioning grooves 123 may be divided into a plurality of front positioning grooves 123a and a plurality of rear positioning grooves 123b. Also, the plurality of front positioning grooves 123a are recessed from the front surface 1a (e.g., the free-form surface 12a) toward the circuit structure 3, and the rear positioning groove 123b is recessed from the rear surface 1b toward the circuit structure 3, but the present invention is not limited to this.

[0047] The bottom of the rear positioning groove 123b and / or the bottom of the front positioning groove 123a may include a portion of the circuit structure 3, thereby exposing the portion of the circuit structure 3. Here, the depth of each of the front positioning grooves 123a is 50 μm to 100 μm, and the depth of each of the rear positioning grooves 123b is 50 μm to 100 μm. That is, in the contact lens 100 according to this embodiment, the depths of the front positioning groove 123a and the rear positioning groove 123b are designed so that the circuit structure 3 is accurately embedded in the lens body 1 at a predetermined depth. Furthermore, the predetermined depth can be changed according to design requirements, and the present invention is not limited thereto.

[0048] In this embodiment, preferably, the plurality of rear positioning grooves 123b and any one of the front positioning grooves 123a do not correspond to the same locations on the circuit structure 3, so as to perform multi-point positioning in a staggered arrangement, thereby realizing high-precision positioning of the circuit structure 3 and effectively avoiding a situation in which a portion of the contact lens 100 is insufficient in strength. Also, in the top view of the contact lens 100, the front positioning groove 123a and the rear positioning groove 123b may each extend along the radial direction of the lens body 1 and cross the circuit structure 3, but the present invention is not limited thereto.

[0049] More specifically, the front positioning groove 123a in this embodiment has a substantially stepped structure and includes a first tread surface 1231, a first riser surface 1232 connecting the front surface 1a (e.g., the free-form surface 12a) and the first tread surface 1231, a second tread surface 1233 spaced apart from the first tread surface 1231, and a second riser surface 1234 connecting the first tread surface 1231 and the second tread surface 1233.

[0050] Here, the first foot surface 1231 is disposed on the bottom side of the front positioning groove 123a and includes a portion of the circuit structure 3 so as to expose the portion of the circuit structure 3. The distance between the second foot surface 1233 and the front surface 1a (e.g., the free-form surface 12a) is longer than the distance between the first foot surface 1231 and the front surface 1a (e.g., the free-form surface 12a). The second riser surface 1234 is disposed on one side of the circuit structure 3 (or electronic component 2), and the circuit 32 is completely embedded in the lens body 1. That is, in the circuit structure 3, only a portion of the carrier 31 can be exposed from the positioning groove 123.

[0051] In addition, the specific structure and shape of the front positioning grooves 123a may be changed according to design requirements. In addition, in this embodiment, the front positioning grooves 123a have different structures (for example, as shown in FIGS. 4 and 8) to achieve high-precision positioning of the circuit structure 3.

[0052] To explain further, the depth of any of the front positioning grooves 123a located in the lower eyelid area 122 is deeper than the depth of any of the front positioning grooves 123a in the layout area 121. Furthermore, the bottom side (or the first tread surface 1231) of one of the front positioning grooves 123a located in the lower eyelid area 122 includes a portion of the electronic component 2, thereby exposing the portion of the electronic component 2 and achieving high-precision positioning of the electronic component 2.

[0053] It should be noted that the contact lens 100 according to this embodiment can be further combined with various devices. For example, in another embodiment not shown in the drawings, the contact lens 100 can be wirelessly connected to any wearable device (e.g., a lens-mounted reader or a neck-mounted reader) worn by the user. The wearable device (or reader) can employ well-known wireless transmission technologies such as RFID, e.g., 13.56 MHz or 860-960 MHz bandwidth, or other wireless inductive power or signal transmission technologies, to power, sense, or provide signal feedback to the contact lens 100, thereby realizing intelligent monitoring (e.g., continuous intraocular pressure collection and warning), intelligent treatment (e.g., controlled release of dry eye medication), AR services (e.g., image projection), or other smart applications.

[0054] [Second embodiment] 10 and 11 show a second embodiment of the present invention. This embodiment is similar to the first embodiment, so similar parts of the two embodiments will not be described again. The differences between this embodiment and the first embodiment will be described below.

[0055] In this embodiment, at least one of the front positioning grooves 123a is formed in a jagged shape across the voids 3111 so as to expose a portion of each of the voids 3111. Here, in the top view of the contact lens 100, the front positioning grooves 123a having a jagged shape are formed by extending along the radial direction of the lens body 1 so as to cross the circuit structure 3. The portion of each of the voids 3111 is located between the first tread surface 1231 and the second tread surface 1233 of the front positioning groove 123a having a jagged shape.

[0056] More specifically, in the jagged front positioning groove 123a, the first tread surface 1231 and the second tread surface 1233 each include a plurality of segments separated from each other. The first tread surface 1231 includes a portion of the circuit structure 3 so as to expose the portion of the circuit structure 3. The distance between the second tread surface 1233 and the front surface 1a is greater than the distance between the first tread surface 1231 and the front surface 1a. The first riser surface 1232 connects the free-form surface 12a and the second tread surface 1233.

[0057] As described above, the contact lens 100 according to the embodiment of the present invention achieves high-precision positioning of the circuit structure 3 by forming the front positioning groove 123a in the annular mounting portion 12, which has a jagged shape and crosses multiple of the voids 3111.

[0058] [Third embodiment] 12 to 16 show a third embodiment of the present invention. This embodiment is similar to the first and second embodiments, so similar parts of the two embodiments will not be described again. Differences between this embodiment and the first and second embodiments will be described below.

[0059] In this embodiment, the voids 3111 each have an elongated shape with approximately the same width, the front positioning groove 123a is formed in the layout area 121, and the carrier 31 has a plurality of radial notches 313 formed from the outer edge toward the central axis L. In addition, the structure of the front positioning groove 123a and the connection relationship between the front positioning groove 123a and the circuit structure 3 are similar to the front positioning groove 123a disclosed in the first embodiment shown in Figures 1 and 9, so they will not be described here again.

[0060] More specifically, in the top view of the contact lens 100, the area of ​​the plurality of voids 3111 distributed in the first quadrant Q1 and the second quadrant Q2 is larger than the area of ​​the plurality of voids 3111 distributed in the third quadrant Q3 and the fourth quadrant Q4. Also, in the top view of the contact lens 100, the area of ​​the plurality of voids 3111 needs to be 1% to 85% (preferably 10% to 40%) of the area enclosed by the outer periphery of the C-shaped segment 311.

[0061] Furthermore, one front positioning groove 123a may be disposed between two adjacent voids 3111, and the plurality of voids 3111 may include the plurality of first voids 3111a and the plurality of second voids 3111b. Here, the plurality of first voids 3111a are located inside the plurality of second voids 3111b, respectively. That is, the radius of each of the second voids 3111b is different from the radius of any of the first voids 3111a (for example, larger than the radius of the first voids 3111a).

[0062] In this embodiment, each of the first voids 3111a is arc-shaped, with its center located on the central axis L, and the first voids 3111a are spaced apart from one another. Each of the second voids 3111b is arc-shaped, with its center located on the central axis L, and the second voids 3111b are spaced apart from one another.

[0063] To further explain, in the top view of the contact lens 100, one of the front positioning grooves 123a is located in the gap between any two adjacent first voids 3111a. Also, the gaps between any two adjacent second voids 3111b (e.g., where no front positioning groove 123a is located) are not located in the same radial direction of the contact lens 100, thereby realizing high-precision positioning of the circuit structure 3.

[0064] [Advantageous Effects of the Embodiments] As described above, in the contact lens according to the embodiment of the present invention, the free-form surface is formed on the front surface of the lens body, so that the thickness of the layout area does not need to completely correspond to the lower eyelid area (for example, the thickness distribution of the annular mounting portion gradually increases toward the lower eyelid area), thereby realizing a thinner layout area, effectively improving the oxygen permeability of the layout area, and reducing the foreign body sensation when wearing the contact lens.

[0065] In addition, the contact lens according to the embodiment of the present invention effectively reduces the occurrence of wrinkles and stress concentration in the carrier by making at least one of the voids formed in the C-shaped segment of the lens body have a specific area (for example, the area of ​​at least one of the voids is 1% to 85% of the area enclosed by the outer contour of the C-shaped segment).In addition, the contact lens according to the embodiment of the present invention further improves the oxygen permeability of the contact lens by combining the arrangement of at least one of the voids with the free-form surface.

[0066] Furthermore, in the contact lens according to the embodiment of the present invention, the annular mounting structure is designed to have a plurality of positioning grooves to achieve high-precision positioning of the circuit structure (and the electronic components) during the manufacturing process of the contact lens, thereby maintaining high consistency when mass-producing the contact lens.

[0067] In further detail, the plurality of positioning grooves are controlled within a certain ratio range (for example, the total opening area of ​​the plurality of positioning grooves is 1% or less of the total surface area of ​​the front and rear surfaces), thereby avoiding excessive influence on the strength of the contact lens. In addition, the portion of the circuit structure is exposed from the corresponding positioning groove to enhance the heat dissipation effect of the circuit structure.

[0068] The above disclosure is merely a preferred embodiment of the present invention, and the scope of the claims of the present invention is not limited thereto. Therefore, all equivalent technical modifications made by utilizing the contents of the specification and drawings of the present invention are included in the scope of the claims of the present invention. [Explanation of symbols]

[0069] 100...contact lenses 1...Lens body 1a...Front 11a…Visible surface 12a...Free-form surface 1b…Rear side 11...Optical section 12...Annular mounting part 121...Layout area 122...Lower eyelid area 123... Positioning groove 123a...Front positioning groove 1231...First tread 1232...First riser 1233...Second tread 1234...Second riser 123b...Rear positioning groove 2. Electronic components 3...Circuit structure 31...Career 311...C-type segment 3111...Void 3111a...First Void 3111b...Second Void 3112...Inner hole edge 3113…Outer hole edge 312...Connection segment 313...Radial notch 32...Circuit L…Center axis Tmax: Maximum thickness Tmin: minimum thickness D121…Distance D122…distance Q1…first quadrant Q2…Second quadrant Q3…Third quadrant Q4...Fourth quadrant σ122…Central angle 200...th 201...Lower eyelid 202...Upper eyelid

Claims

1. A contact lens comprising: a lens body including an optical portion and an annular mounting portion surrounding the optical portion; an electronic component; and a circuit structure, The annular mounting portion includes a C-shaped layout area and a lower eyelid area between both ends of the layout area, The electronic component is embedded in the lower eyelid area of ​​the annular mounting portion; the circuit structure is embedded in the annular mounting portion and electrically connected to the electronic component; The lens body is a rear surface having a predetermined curvature adapted to be placed on a user's eye; a front surface opposite the rear surface; the annular mounting portion has a plurality of positioning grooves recessed from at least one of the front surface and the rear surface toward the circuit structure for positioning the lens body and the circuit structure, and a bottom side of each of the positioning grooves includes a portion of the circuit structure such that a portion of the circuit structure is exposed; a total opening area of ​​the plurality of positioning grooves is 1% or less of a total surface area of ​​the front surface and the rear surface; A contact lens characterized in that the number of the positioning grooves is at least four, a central axis is defined in the optical portion, and when the contact lens is divided sequentially into a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant in a counterclockwise direction starting from the central axis in a top view, at least one of the positioning grooves is present in each of the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant.

2. The positioning grooves include a plurality of front positioning grooves recessed into the front surface, and the depth of each of the front positioning grooves is 50 μm to 100 μm; The front positioning groove is a first tread including the portion of the circuit structure such that the portion of the circuit structure is exposed; and a first riser surface connected between the front surface and the first tread surface; A second tread surface; and a second riser surface connected between the first tread surface and the second tread surface and disposed on one side of the circuit structure or the electronic component; The contact lens of claim 1 , wherein the distance between the second tread surface and the anterior surface is greater than the distance between the first tread surface and the anterior surface.

3. The contact lens of claim 2 , wherein the circuit structure includes a carrier and a circuit formed on the carrier, the circuit being completely embedded in the lens body.

4. The contact lens of claim 2 , wherein the first tread surface of one of the front positioning grooves located in the lower eyelid area includes a portion of the electronic component such that the portion of the electronic component is exposed.

5. A plurality of voids are formed in the circuit structure, the lens body is filled with the plurality of voids, and the plurality of positioning grooves include a front positioning groove recessed in the front surface, the front positioning groove crossing the plurality of voids such that a portion of each of the voids is exposed; The front positioning groove is a first tread including the portion of the circuit structure such that the portion of the circuit structure is exposed; and a second tread surface; A distance between the second tread surface and the front surface is greater than a distance between the first tread surface and the front surface; The contact lens of claim 1 , wherein the portion of each of the voids is located between the first and second tread surfaces of the front positioning groove.

6. The contact lens according to claim 5 , wherein, in a top view of the contact lens, the front positioning groove is formed extending along a radial direction of the lens body so as to cross the circuit structure.

7. A plurality of voids are formed in the circuit structure, the lens body is filled with the plurality of voids, and the plurality of positioning grooves include a front positioning groove recessed in the front surface; the front positioning groove traverses a plurality of the voids such that a portion of each of the voids is exposed; The contact lens of claim 1 , wherein the lower eyelid area is located in the third and fourth quadrants, and the plurality of voids are distributed in the first, second, third and fourth quadrants.

8. The contact lens of claim 7, wherein in the top view of the contact lens, the lower eyelid area is formed in an arc corresponding to a central angle of the origin, the central angle being between 30 degrees and 180 degrees.

9. A plurality of voids are formed in the circuit structure, the lens body is filled with the plurality of voids, and the plurality of positioning grooves include a front positioning groove recessed in the front surface, the front positioning groove crossing the plurality of voids such that a portion of each of the voids is exposed; the circuit structure comprises a carrier and a circuit formed on the carrier and connected to the electronic component; The carrier includes a C-shaped segment embedded in the layout area and a connecting segment embedded in the lower eyelid area, the connecting segment being connected between two end edges of the C-shaped segment; The circuit includes a plurality of enclosed closed electrical circuits; The contact lens of claim 1 , wherein a plurality of said voids are formed in said C-shaped segment and are located in a plurality of said closed circuits, respectively.

10. 10. The contact lens of claim 9, wherein the plurality of voids includes at least one first void and at least one second void, each of the at least one first void and the at least one second void being arc-shaped and having their centers located on a central axis of the optical portion, and a radius of the at least one second void being different from a radius of the at least one first void.

11. The contact lens of claim 2, wherein the plurality of positioning grooves further include a plurality of rear positioning grooves recessed into the rear surface, and the plurality of rear positioning grooves and any one of the front positioning grooves do not correspond to the same location of the circuit structure.

12. The contact lens of claim 1, wherein the positioning grooves further include a plurality of rear positioning grooves recessed into the rear surface, each of the rear positioning grooves having a depth of 50 μm to 100 μm, and in a top view of the contact lens, at least one of the rear positioning grooves is formed by extending along the radial direction of the lens body so as to cross the circuit structure.

13. the front surface includes a visible surface corresponding to the optical portion and a freeform surface corresponding to the annular mounting portion; the visible surface has a first curvature, the first curvature being different from a second curvature of the free-form surface such that a thickness distribution of the annular mounting portion is gradually increased toward the electronic component; The circuit structure comprises: a carrier including a C-shaped segment embedded in the layout area and a connection segment embedded in the lower eyelid area; a circuit formed on the carrier and connected to the electronic component; the carrier has a molded curvature different from the second curvature, and the connecting segment is connected between two end edges of the C-shaped segment; The contact lens of claim 1 , wherein a maximum thickness of the annular mounting portion is at the lower eyelid area and a minimum thickness of the annular mounting portion is at a point of the layout area away from the lower eyelid area.

14. 2. The contact lens of claim 1, wherein the anterior surface includes a visible surface corresponding to the optical portion and a free-form surface corresponding to the annular mounting portion, the visible surface having a first curvature, the first curvature being different from a second curvature of the free-form surface, such that a thickness distribution of the annular mounting portion is gradually thicker toward the electronic component, and a distance between the circuit structure and the posterior surface in the lower eyelid area is greater than a distance between the circuit structure and the posterior surface in the layout area.

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