Wearable healthcare device including a transparent patch for skin attachment and method for managing skin health using the same

Abstract

We provide a wearable healthcare device that includes a transparent patch for skin attachment. [Solution] The wearable healthcare device is composed of a hydrogel mixture and includes a surface layer 1100 that forms a surface and a skin contact layer 1200 that contacts one surface of the surface layer 1100 and is composed of the hydrogel mixture, the surface layer 1100 includes a first layer 1110, a second layer 1130 and an intermediate layer 1120 formed between the first layer 1110 and the second layer 1130, and the intermediate layer 1120 includes a plurality of LED modules.

Description

Technical Field

[0001] The present invention relates to a hydrogel-based LED mask device, and more specifically, includes an LED array system integrated in a hydrogel patch attached to the skin, has flexible and stretchable characteristics, and relates to a wearable healthcare device that provides phototherapy for improving the user's skin condition.

Background Art

[0002] With the continuous growth of the skincare and beauty industries, technological development for skin improvement and treatment has been rapidly progressing. In particular, as the desire to maintain healthy skin increases due to the aging of the population and the increase in income, various skin improvement devices are showing high demand in the market. Among them, LED masks based on phototherapy are positioned as representative technologies that provide skin regeneration and improvement effects. LED light sources are effective in stimulating skin tissue to promote collagen production, improving skin elasticity, and alleviating inflammation and edema.

[0003] Such phototherapy technologies are being increasingly widely used in the medical and beauty fields, and are known to provide various effects such as pain relief, recovery of skin wounds, prevention of cell damage, and skin whitening. LED masks use low-energy visible light and near-infrared light to stimulate the dermis and epidermis tissues of the skin, thereby achieving skin improvement effects. In particular, the effects of increasing collagen production, skin elasticity, and brightness have greatly enhanced user satisfaction.

[0004] Currently, many domestic and foreign companies have entered the LED mask market and launched various products, and market competition is intensifying. However, conventional LED mask products are mainly designed as fixed masks, and it has been pointed out that they are difficult to adhere to the user's face and cause inconvenience during long-term wearing.

[0005] In particular, conventional LED masks, being made of rigid plastic or silicone materials, have the disadvantage of not fitting comfortably to the skin and restricting movement during use. These structural limitations often result in insufficient transmission of the LED light source to the skin, reducing the therapeutic effect. Furthermore, moisture can accumulate inside the mask, leading to bacterial growth and potentially causing discomfort during prolonged use. Additionally, LED masks may induce eye damage and skin dryness, requiring protective equipment.

[0006] To solve these problems, there is a need to develop new LED masks that utilize flexible, skin-fitting materials. In particular, there is a need for a device that combines flexible or stretchable materials that can naturally conform to the curved surface of the skin with LED technology, minimizing the distance between the skin and the LED light source and enabling efficient light transmission. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Republic of Korea Public Utility Model No. 20-2019-0002254 [Overview of the project] [Problems that the invention aims to solve]

[0008] The problem that this invention aims to solve is to provide a hydrogel-based, flexible light (LED) mask device that improves skin adhesion, maximizes the effectiveness of LED therapy, and provides a comfortable wearing experience for the user.

[0009] The problems that this invention aims to solve are not limited to those mentioned above, and other problems not mentioned can be clearly understood by an ordinary person of the art from the following description. [Means for solving the problem]

[0010] Disclosed are wearable healthcare devices including a transparent patch for skin attachment according to various embodiments of the present invention to solve the aforementioned problems. The device comprises a surface layer comprising a hydrogel mixture and a skin contact layer comprising the hydrogel mixture and in contact with one surface of the surface layer, wherein the surface layer comprises a first layer, a second layer and an intermediate layer formed between the first layer and the second layer, and the intermediate layer comprises a plurality of LED modules.

[0011] In other embodiments, the hydrogel mixture comprises distilled water, acrylamide, a hydrophilic polymer, methylenebisacrylamide (MBA), and ammonium persulfate (APS), wherein the hydrophilic polymer is a hydrophilic polymeric substance that absorbs water and may include at least one of chitin, chitosan, gelatin, hyaluronic acid, carboxymethylcellulose (CMC), and polyvinyl alcohol (PVA).

[0012] In other embodiments, the distilled water is provided in an amount of 50 to 55 parts by weight per 100 parts by weight of the hydrogel mixture, the acrylamide is provided in an amount of 40 to 45 parts by weight per 100 parts by weight of the hydrogel mixture, the hydrophilic polymer is provided in an amount of 5 to 10 parts by weight per 100 parts by weight of the hydrogel mixture, the methylenebisacrylamide is provided in an amount of 0.025 to 0.030 parts by weight per 10 parts by weight of the hydrogel mixture, and the ammonium persulfate is provided in an amount of 0.125 to 0.130 parts by weight per 100 parts by weight of the hydrogel mixture.

[0013] In other embodiments, the surface layer and the skin contact layer are provided in a detachable manner.

[0014] In other embodiments, the intermediate layer may include a transparent electrode for connecting the plurality of LED modules, a sensor module for obtaining sensing information related to skin health, and a control module for controlling the plurality of LED modules based on the sensing information.

[0015] In other embodiments, the control module can generate control information for controlling the plurality of LED modules based on the sensing information, analyze changes in the sensing information collected over a predetermined period of time, generate user sensitivity information, and make corrections to the control information in accordance with the user sensitivity information.

[0016] In other embodiments, the sensor module includes an adhesion sensing sensor module for sensing skin contact, the control module generates adhesion state information based on sensing information obtained from the adhesion sensing sensor module, and can adjust the output intensity and operation status of the plurality of LED modules based on the adhesion state information.

[0017] In other embodiments, the second layer comprises a first mixture having an ultraviolet blocking function, wherein the first mixture comprises avobenzone, ethylhexyl salicylate, homosalate, and octocrylene, wherein the avobenzone is provided in an amount of 10 to 15 parts by weight per 100 parts by weight of the first mixture, the ethylhexyl salicylate is provided in an amount of 15 to 20 parts by weight per 100 parts by weight of the first mixture, the homosalate is provided in an amount of 35 to 40 parts by weight per 100 parts by weight of the first mixture, and the octocrylene is provided in an amount of 35 to 40 parts by weight per 100 parts by weight of the first mixture.

[0018] In other embodiments, the second layer is formed by mixing the first mixture and the hydrogel mixture in a ratio range of 20 parts by weight to 80 parts by weight to 30 parts by weight to 70 parts by weight, respectively, and the second layer may further include zinc oxide (ZnO) and a glycol-based solution.

[0019] A skin health management method using a wearable healthcare device according to another embodiment of the present invention is disclosed. The method may include the steps of collecting sensing information related to skin health, generating control information for controlling a plurality of LED modules by analyzing the sensing information, and controlling the plurality of LED modules based on the control information.

[0020] In the present invention, other specific matters are included in the detailed description and the drawings.

Effects of the Invention

[0021] According to various embodiments of the present invention, the hydrogel-based LED mask device has excellent skin adhesion and wearing comfort, and can eliminate the inconveniences that occurred with conventional fixed masks. Since the LED array system irradiates light while being in close contact with the skin, the LED treatment effect can be maximized. In addition, the hydrogel patch does not irritate the skin and helps maintain skin health through a moisturizing effect.

[0022] In addition, all layers constituting the patch contain a hydrogel component, and there is an advantage in that the patch adheres to the skin for a long time due to improved water retention, and the adhesion is maintained even on the curved surface and movement of the skin.

[0023] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

Brief Description of the Drawings

[0024] Various aspects are described with reference to the drawings, where like reference numerals are used throughout to refer to like elements. In the following examples, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. It will be apparent, however, that the aspects may be practiced without these specific details.

[0025] [Figure 1] Figure 1 is an exemplary diagram schematically showing a system for implementing a skin health management method according to an embodiment of the present invention.

[0026] [Figure 2] Figure 2 is an exemplary diagram for explaining a peeling phenomenon due to mechanical properties between a film and an adhesion site.

[0027] [Figure 3] Figure 3 is an exemplary diagram for explaining the adhesive force between a film composed of a hydrogel mixture according to an embodiment of the present invention and the skin.

[0028] [Figure 4] Figure 4 is an exemplary diagram showing a transparent patch for skin attachment including an LED module and an electrode array according to an embodiment of the present invention.

[0029] [Figure 5] Figure 5 is an exemplary diagram for explaining the configuration of a transparent patch for skin according to an embodiment of the present invention. [Figure 6] Figure 6 is an exemplary diagram for explaining the configuration of a transparent patch for skin according to an embodiment of the present invention. [Figure 7] Figure 7 is an exemplary diagram for explaining the configuration of a transparent patch for skin according to an embodiment of the present invention.

[0030] [Figure 8] Figure 8 is an exemplary diagram for explaining the process and results of an adhesion ability test according to an embodiment of the present invention.

[0031] [Figure 9] Figure 9 is an illustrative diagram illustrating the biocompatibility test process and results according to one embodiment of the present invention. [Modes for carrying out the invention]

[0032] Various embodiments and / or aspects are disclosed with reference to the drawings. In the following description, numerous specific details are disclosed for illustrative purposes to aid in the overall understanding of one or more embodiments. However, it will also be apparent to those ordinary skill in the art of the invention that these embodiments can be carried out without such specific details. The following description and accompanying drawings describe in detail specific exemplary embodiments of one or more embodiments. However, these embodiments are illustrative, and some may be used in various ways in the principles of various embodiments, and the description is intended to include all such embodiments and their equivalents. Specifically, the terms “embodiments,” “examples,” “aspects,” “exemplifications,” etc., as used herein, do not necessarily imply that any embodiment or design described is better or more advantageous than any other embodiment or design.

[0033] Hereafter, regardless of the reference numerals used in the drawings, identical or similar components will be given the same reference numeral, and redundant descriptions thereof will be omitted. Furthermore, when describing the embodiments disclosed herein, if it is determined that a specific description of the relevant prior art would obscure the gist of the embodiments disclosed herein, such detailed description will be omitted. In addition, the accompanying drawings are provided to facilitate understanding of the embodiments disclosed herein, and the accompanying drawings do not limit the technical ideas disclosed herein.

[0034] Although terms such as "first," "second," etc., are used to describe various elements and components, it goes without saying that these elements and components are not limited by these terms. These terms are used simply to distinguish one element or component from another. Therefore, it goes without saying that the first element or component mentioned below may also be the second element or component within the technical concept of the present invention.

[0035] Unless otherwise specified, all terms used herein (including technical and scientific terms) should be used in a sense that can be commonly understood by a person of ordinary skill in the art to which this invention pertains. Furthermore, terms defined in commonly used dictionaries should not be interpreted ideally or excessively unless otherwise explicitly defined.

[0036] Furthermore, the term "or" is intended to mean an implicational "or," not an exclusive "or." That is, unless otherwise specified or unclear from the context, "X uses A or B" is intended to mean one of the natural implicational substitutions. That is, if X uses A, or X uses B, or X uses both A and B, "X uses A or B" can apply to any of these cases. Also, the term "and / or" as used herein should be understood to refer to and include all possible combinations of one or more of the listed related items.

[0037] Furthermore, the terms “include” and / or “contain” should be understood to mean that such feature and / or component exists, but not to exclude the existence or addition of one or more other features, components and / or groups thereof. Also, where not specifically identified or where it is not contextually clear that the singular form is used, in this specification and claims, the singular form should generally be interpreted as meaning “one or more.”

[0038] When one component is described as being "linked" or "connected" to another component, it should be understood that it may be directly linked to or connected to the other component, but that other components may also be present in between. On the other hand, when one component is described as being "directly linked" or "directly connected" to another component, it should be understood that there are no other components in between.

[0039] When elements or layers are referred to as "on" or "on" another element or layer, this includes not only directly above the other element or layer, but also all cases where another layer or other element is interposed in between. On the other hand, when elements are referred to as "directly on" or "directly above," it indicates that there is no other element or layer interposed in between.

[0040] Spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used to easily describe the correlation between one component and other components, as shown in the drawings. Spatially relative terms should be understood as terms that include different directions for elements in use or operation, in addition to the directions shown in the drawings.

[0041] The objectives and effects of the present invention, and the technical configurations for achieving them, will become clear by referring to the embodiments described in detail below, along with the accompanying drawings. When describing the present invention, if a specific description of a known function or configuration is deemed to obscure the gist of the invention, such detailed description will be omitted. Furthermore, the terms used below are defined in consideration of the functions of the present invention and may change depending on the intent or conventions of the user or operator.

[0042] However, the present invention is not limited to the embodiments disclosed below and may be embodied in various forms. These embodiments are provided merely to complete the invention and to fully inform those skilled in the art of the invention of the categories of disclosure, and the invention is defined only by the categories of claims. Therefore, the definition should be based on the content of the entire specification.

[0043] Figure 1 is a schematic diagram illustrating a system for implementing a skin health management method according to one embodiment of the present invention. The components in Figure 1 are illustrative examples shown in a summarized and simplified manner, and the system of the present invention is not limited thereto.

[0044] Referring to Figure 1, according to one embodiment of the present invention, the system for performing a skin health management method may include a wearable healthcare device (hereinafter referred to as "wearable healthcare device 100") including a transparent patch for skin attachment, a user terminal 200, and an external server 300.

[0045] According to one embodiment of the present invention, the user terminal 200 is provided with the ability to collect skin condition data from the wearable healthcare device 100 and transmit such data to an external server 300 or to analyze it in real time. For example, the user can monitor information such as skin moisture content, temperature changes, and UV protection status through the user terminal 200 and check notifications and warnings generated by the device. Such data is displayed in real time via an application or visualization interface installed on the user terminal, and the user can receive a customized management solution tailored to their skin health condition.

[0046] According to the embodiment, the user terminal 200 may be a smartphone, tablet, or other mobile device, and can communicate with the wearable healthcare device 100 and an external server 300 to provide various network traffic management and optimization functions. This allows the user to monitor the condition of their skin based on data collected from the wearable device and to set up or adjust a user-customized management program as needed.

[0047] According to one embodiment of the present invention, the wearable healthcare device 100 includes a transparent skin patch 1000 attached to the skin, the patch may integrate various sensors and LED modules for monitoring or improving the condition of the skin. For example, the skin contact surface may include a moisture sensor, a temperature sensor, and an ultraviolet (UV) sensor, which sense the condition of the skin in real time and collect data. The collected data is transmitted to a user terminal 200 or an external server 300, allowing the user to easily check the condition of their skin and perform customized management as needed.

[0048] In particular, the wearable healthcare device 100 includes multiple LED modules that can provide phototherapy for skin improvement. For example, 630nm wavelength red light penetrates deep into the skin to promote collagen production, supporting skin regeneration and improving elasticity. 415nm blue light is effective in eliminating acne bacteria and soothing skin inflammation. Such LED light sources are automatically adjusted according to the user's skin condition to maximize skin regeneration and improvement effects. The LED light sources are designed with low power consumption to ensure safe irradiation of the skin, and do not cause skin irritation or heat sensation even with prolonged use.

[0049] Furthermore, the wearable healthcare device 100 is manufactured as a hydrogel-based patch that adheres gently to the skin. The hydrogel patch has a high moisture content, is less irritating even when worn on the skin for extended periods, and provides a comfortable wearing experience. For example, it helps retain skin moisture and prevent dryness even while the user is receiving LED treatment for a long time. In addition, the hydrogel-based patch has flexible and elastic properties, so it remains securely attached without falling off even when the user moves or moves their facial muscles.

[0050] According to the examples, the wearable healthcare device 100 may be applied to various parts of the body. For example, it may be designed as a large patch that can be attached to the entire face, or it can be made as a small patch for specific areas, such as wrinkles around the eyes or mouth, or for improving sebum on the forehead. Furthermore, the arrangement and intensity of the LED modules can be customized to provide customized treatment according to each user's skin condition and management objectives.

[0051] The wearable healthcare device 100 may be linked to a user terminal 200 and an external server 300 via a network. For example, a user can monitor the condition of their skin via an application on a terminal such as a smartphone or tablet and check the status of their skincare in real time. The external server 300 can analyze the user's data to provide a personalized skincare plan, or it can accumulate long-term skin condition data to suggest more accurate directions for skin improvement.

[0052] Such a wearable healthcare device 100 allows users to continuously monitor the condition of their skin while enabling them to engage in free activity during their daily lives. For example, users can wear the patch and receive LED treatment even while exercising, without the patch falling off or causing any inconvenience.

[0053] According to one embodiment of the present invention, the external server 300 acts as a central hub for managing and analyzing data between the wearable healthcare device 100 and the user terminal 200. The external server 300 can collect the user's skin condition data in real time and generate customized skincare information based on it. For example, skin moisture, temperature, and UV exposure information collected by the wearable healthcare device 100 is transmitted to the external server for statistical analysis of the user's skin condition. Such analysis results are provided to the user via the user terminal 200, and the user can receive services such as skincare advice and recommendations for customized products as needed.

[0054] In a specific implementation, the external server 300 can leverage a large-scale database to compare and analyze skin data from various users, and based on this data, it can develop more precise skincare algorithms. For example, it can track the user's skin condition change patterns to evaluate the progress of skin improvement over the long term, or predict skin reactions to specific seasons or environmental changes. This data allows users to select the most suitable care method for their skin, helping them maintain and improve their skin health in the long term.

[0055] Furthermore, the external server 300 can provide customized skincare solutions tailored to each user's skin condition using machine learning and artificial intelligence (AI)-based analytical tools. For example, the external server can learn from the user's past data to analyze trends in changes in skin condition and, based on that, propose a plan to provide LED treatment intensity, treatment time, or intensive management of specific skin areas that are appropriate for the user. This allows the external server to increase the efficiency of skincare and maximize user satisfaction.

[0056] The external server 300 securely transmits data between the wearable healthcare device 100 and the user terminal 200 via the network 400, and can protect the user's personal information using security protocols such as SSL / TLS. Furthermore, the server operates on a cloud-based system, efficiently processing large amounts of data and supporting users in checking and managing their skin condition anytime, anywhere.

[0057] As a result, the external server 300 plays a crucial role in providing users with more precise and effective skincare methods by handling real-time data communication and analysis between the wearable healthcare device and the user terminal, and by providing customized skincare solutions. The components and their operating principles according to embodiments of the present invention will be described in detail below with reference to Figures 2 to 9.

[0058] Figure 2 is an illustrative diagram illustrating the peeling phenomenon due to the mechanical properties between the film and the adhesive site. Figure 3 is an illustrative diagram illustrating the adhesive strength between a film comprising a hydrogel mixture according to one embodiment of the present invention and the skin. Figure 4 is an illustrative diagram showing a transparent patch for skin attachment including an LED module and an electrode array according to one embodiment of the present invention. Figures 5 to 7 are illustrative diagrams illustrating the configuration of a transparent patch for skin according to one embodiment of the present invention. Figure 8 is an illustrative diagram illustrating the adhesiveness test process and results according to one embodiment of the present invention. Figure 9 is an illustrative diagram illustrating the biocompatibility test process and results according to one embodiment of the present invention.

[0059] The wearable healthcare device 100 of the present invention may include a transparent skin patch 1000 that adheres to the skin. In the examples, the transparent skin patch 1000 may be used as a cosmetic and protective patch that adheres directly to the user's skin and performs functions such as UV protection, moisture retention, nutrient supply, and skin soothing. The transparent skin patch 1000 provides excellent adhesion, is easy to use in daily life, and can adhere stably to areas that move frequently, such as the face, neck, arms, and legs. An LED light source may be included inside the patch, which can promote skin regeneration or support whitening and improvement of elasticity.

[0060] According to one embodiment of the present invention, the transparent skin patch 1000 is composed of a hydrogel component having mechanical properties similar to those of skin, thereby achieving improved adhesion and reduced peeling.

[0061] Generally, when there is a large difference in mechanical properties between the film (or patch) and the bonding site (e.g., skin), as shown in Figure 2(a), uneven stress is generated at the bonding site, reducing the adhesive strength and easily causing delamination.

[0062] More specifically, Figure 2(a) shows a situation where delamination occurs due to stress concentration between the film and the skin when there is a large difference in physical properties. The harder the film and the greater the difference in physical properties between it and the skin, the more stress concentrates at the adhesive site, making the patch more likely to fall off.

[0063] On the other hand, as shown in Figure 2(b), when the mechanical properties are similar, the stress distribution at the adhesive site becomes uniform, and the adhesion between the film and the skin is stably maintained. Such mechanical properties can be achieved by using skin-like materials such as hydrogels, which is one of the important technical features of the transparent skin patch 1000 of the present invention.

[0064] When the hydrogel mixture of the present invention is formed in the form of a film (or patch), i.e., a hydrogel film 10, as shown in Figure 3, the hydrogel film 10 adheres strongly to the user's skin and flexibly conforms to the curves of the skin. Due to the high water content and flexibility inherent to hydrogels, the hydrogel film 10 can provide a comfortable wearing experience while adhering closely to the skin and can maintain a stable contact area with the skin for extended periods. Hydrogels commonly used inevitably experience rapid water loss at room temperature, which may somewhat reduce their mechanical properties and adhesive properties. In the case of the hydrogel mixture of the present invention, by utilizing a solvent with a negative charge function that is opposite to the positively charged hydrogen of water, each solvent molecule can retain water for extended periods through hydrogen bonding and also provide an antifreeze function.

[0065] Furthermore, the hydrogel film of the present invention can embody mechanical properties similar to those of the human body, particularly facial skin, through the optimization of functional materials. To achieve this, high mechanical properties are provided by adjusting the composition ratio of the hydrogel material to form a double network structure through the interaction and entanglement of polymer chains. Such a double network hydrogel mimics the elasticity and flexibility of skin, and can maintain stable adhesion without putting strain on the skin even when worn for extended periods.

[0066] In other words, the present invention provides a hydrogel patch having physical properties similar to skin through an optimized composition ratio and reaction mechanism of the material, thereby enabling stable adhesion to the user's skin for extended periods and minimizing the reduction in adhesive strength and peeling phenomena.

[0067] The transparent skin patch 1000 of the present invention may include a plurality of LED modules, as shown in Figure 4. Specifically, the LED modules are inserted into a hydrogel-based transparent patch and can irradiate the skin with LED light while in close contact with the skin, thereby promoting skin improvement and regeneration. The LED modules generate light of various wavelengths, which can penetrate deep into the skin to promote collagen production or provide effects such as improving skin tone and increasing elasticity.

[0068] According to one embodiment of the present invention, the transparent skin patch 1000 may include a surface layer 1100 and a skin contact layer 1200, as shown in Figure 5.

[0069] Furthermore, according to the embodiment, the surface layer 1100 may include a first layer 1110, a second layer 1130, and an intermediate layer 1120 formed between the first layer 1110 and the second layer 1130. In this case, the intermediate layer 1120 is characterized by comprising a plurality of LED modules 1121.

[0070] According to the embodiment, the LED module contained in the intermediate layer 1120 plays a role in transmitting light to the skin, which helps in skin regeneration and improvement. The LED module 1121 can provide various skin improvement effects such as increased skin elasticity, promotion of collagen production, and reduction of wrinkles.

[0071] In a specific embodiment, the intermediate layer 1120 may be equipped with a plurality of LED modules 1121, a sensor module 1122, a transparent electrode 1123, and a control module.

[0072] In the embodiment, the intermediate layer 1120 may include transparent electrodes 1123 that connect multiple LED modules 1121, as shown in Figures 6 and 7. According to a specific embodiment, the transparent electrodes 1123 provided in the intermediate layer 1120 are designed to connect multiple LED modules 1121 and efficiently transmit light. The transparent electrodes 1123 are mainly composed of a material that has excellent electrical conductivity while maintaining transparency, and materials such as indium tin oxide (ITO), graphene, or silver nanowires may be used.

[0073] The transparent electrode 1123 supplies power to the LED module 1121 and supports the effective transmission of light generated by the LED to the skin. Because such an electrode has excellent light transmittance, it can transmit light to the skin without obstruction, while simultaneously maintaining electrical properties that allow for the supply of sufficient current.

[0074] In particular, according to embodiments of the present invention, the transparent electrode 1123 can have stretchable and flexible properties. That is, the transparent electrode 1123 is designed to be able to flexibly deform to conform to the curves and movements of the skin, and to continuously supply current while remaining in close contact with the skin. This allows the LED module 1121 to irradiate the skin surface uniformly with light while being wearable for extended periods without causing inconvenience to the user.

[0075] In the examples, the transparent electrode 1123 is generally fabricated in the form of an extremely thin film and formed on the upper surface of the hydrogel (i.e., the upper surface of the second layer containing the hydrogel component). Furthermore, the flexible electrode material is designed to withstand repeated bending and deformation without mechanical damage and to maintain durability even with long-term use.

[0076] In other words, the transparent electrode 1123 of the present invention connects multiple LED modules 1121 while maintaining transparency, and its flexible properties allow it to adapt to various skin movements, enabling it to function effectively as a long-term skin-contact healthcare device.

[0077] In addition, in the embodiment, the intermediate layer 1120 may include a sensor module 1122 for obtaining sensing information related to skin health. The sensor module 1122 may be provided in the region between the first layer 1110 and the second layer 1130, i.e., in the intermediate layer 1120, as shown in Figures 6 and 7.

[0078] In one embodiment, the sensor module 1122 is a core component of the transparent skin patch of the present invention and plays a role in monitoring the health of the skin in real time. The sensor module 1122 includes various types of sensors and provides a function to comprehensively evaluate the skin condition. Specifically, the sensor module may include various sensors that measure biometric information such as skin moisture content, ultraviolet exposure, skin temperature, and electrical impedance.

[0079] As a specific example, the sensor module 1122 may include a moisture measurement sensor module, an ultraviolet (UV) measurement sensor module, a temperature sensor module, an electrical impedance sensor module, and other biosignal sensor modules, each of which helps to comprehensively evaluate the condition of the skin.

[0080] For example, a moisture measurement sensor module precisely senses the moisture content of the skin and plays a role in evaluating whether the skin is dry or sufficiently moisturized. This sensor module can detect minute changes in moisture on the skin's surface in real time, thereby continuously monitoring the skin's hydration status. For instance, if the skin's moisture level drops and it enters a dry state, it can immediately alert the user to the need for hydration or trigger the operation of a device to automatically provide moisturizing effects. Such functionality is particularly useful for users who spend long periods of time in dry environments and helps maintain skin health.

[0081] Furthermore, for example, the ultraviolet (UV) measurement sensor module precisely measures the amount of UV-A and UV-B light exposure and evaluates in real time whether the skin is adequately protected from ultraviolet radiation. Ultraviolet radiation is one of the main causes of skin aging and pigmentation, and UV protection is a very important part of skin health management. If the amount of UV exposure exceeds a set safety range, this sensor module can notify the user that UV protection is necessary and can also automatically activate UV protection agents or recommend the use of UV protection products. This can help prevent skin damage caused by ultraviolet radiation.

[0082] Furthermore, for example, the temperature sensor module precisely measures the surface temperature of the skin and monitors in real time whether the skin is overheating or cooling down. If the skin temperature is too high, this could indicate skin irritation from UV exposure or the external environment, and in such situations, immediate skin cooling may be necessary. Conversely, if the skin temperature is too low, the skin may dry out or become damaged, so this sensor module is designed to take appropriate warming measures according to the skin temperature. Such temperature regulation functions are useful in maintaining skin health and providing protection from the external environment.

[0083] Furthermore, for example, an electrical impedance sensor module measures the electrical resistance characteristics of the skin and evaluates its condition. The electrical impedance value of the skin is used as an important indicator that reflects the skin's moisture level, elasticity, and skin barrier condition. Low electrical impedance means that the skin is well-hydrated, while high values ​​may indicate that the skin is dry or damaged. This sensor module is particularly effective in evaluating moisture and elasticity in the deeper layers of the skin and provides a foundation for proposing customized management solutions tailored to the skin's condition.

[0084] Furthermore, various biosignal sensor modules may include, for example, heart rate sensors, blood flow sensors, and oxygen saturation sensors that help comprehensively assess the condition of the skin, thereby enabling monitoring not only the user's skin condition but also their overall health. Heart rate sensors may sense the user's heartbeat through the skin surface and be used to analyze skin circulation and stress levels. Blood flow sensors monitor the skin's blood circulation by sensing subtle changes in blood flow beneath the skin, and oxygen saturation sensors are useful for measuring the amount of oxygen in the blood to ensure that the skin is receiving sufficient oxygen. Through such comprehensive biosignal monitoring, wearable healthcare devices can provide user-customized skincare solutions.

[0085] Furthermore, in the embodiment, the intermediate layer 1120 may include a control module that controls the plurality of LED modules based on sensing information. The control module can control the overall operation of the wearable healthcare device.

[0086] According to the embodiment, the control module can analyze various sensing information about skin condition collected by the sensor module, such as moisture content, degree of UV exposure, skin temperature, and electrical impedance, and control the output intensity, operating time, and light wavelength of each LED module. This allows for customized phototherapy tailored to the skin condition, maximizing the user's skin improvement effect. For example, if the skin is dry, the control module can perform phototherapy that helps replenish moisture through appropriate LED wavelengths, or if UV exposure is high, it can adjust the LED lighting to enhance the UV blocking function. In this way, the control module can control the overall operation of the device and provide the user with an optimal skin treatment solution through efficient management of the LED modules.

[0087] In this embodiment, the control module can precisely control the operation of the LED module based on sensing information obtained from various sensor modules. For example, if the moisture measurement sensor module detects that the skin's moisture content is low, the control module activates LED wavelengths related to skin moisturizing. At this time, the LED module emits specific wavelengths (e.g., red light or near-infrared light) that help retain or replenish skin moisture, allowing the light to penetrate deep into the skin to promote collagen production and support skin cell regeneration. Through this process, a moisturizing effect can be automatically provided when the skin becomes dry.

[0088] Furthermore, when the UV measurement sensor module detects that the skin has been excessively exposed to UV-A or UV-B ultraviolet rays, the control module adjusts the LED module to enhance its UV-blocking functions. For example, when UV exposure is detected, the control module activates LED wavelengths for skin cooling to soothe the skin and minimize UV ​​damage.

[0089] In this embodiment, the temperature sensor module can detect if the skin surface temperature is abnormally high or low, and the control module adjusts the output of the LED module based on this information. For example, if the skin surface temperature is too high and overheating is detected, the control module activates the blue light or near-infrared wavelength LED module to provide a cooling effect that lowers the skin temperature. Conversely, if the skin is detected to be too cold, the control module may control the system to warm the skin via infrared wavelengths to promote blood circulation in the skin.

[0090] In this embodiment, the electrical impedance sensor module measures the electrical properties of the skin to sense the skin's moisture level and the health of the skin barrier. A low electrical impedance value may indicate that the skin barrier is damaged or unable to retain moisture adequately. In this case, the control module activates specific wavelengths of the LED module to irradiate the skin with light that supports skin barrier regeneration. In this process, red light and near-infrared wavelengths can stimulate the regeneration of skin cells and contribute to strengthening the skin barrier.

[0091] Furthermore, the control module can integrate data from each sensor module and use various combinations of LED wavelengths. For example, if it detects that the skin's moisture level is low and its UV exposure is high, the control module can optimize the skin's health by combining LED wavelengths (e.g., red and blue light) that can simultaneously replenish moisture and block UV rays.

[0092] This customizable control system allows for real-time adjustment of the LED module's output intensity and operating time, enabling the provision of customized therapeutic effects tailored to the individual's skin condition.

[0093] In various embodiments, the control module can generate control information for controlling multiple LED modules based on sensing information, generate user sensitivity information by analyzing changes in sensing information collected over a predetermined period of time, and correct the control information in accordance with the user sensitivity information.

[0094] More specifically, the control module generates control information for controlling multiple LED modules based on sensing information, and can generate user sensitivity information by analyzing changes in the sensing information collected over a predetermined period of time. For example, the sensor module continuously collects information such as skin moisture content, temperature, and UV exposure level, and the control module analyzes this data in real time to understand the user's skin condition change patterns.

[0095] User sensitivity information may include data indicating how sensitive each user is to UV radiation, temperature changes, and moisture levels. Based on this information, the control module can adjust the light output intensity, operating cycle, wavelength, etc., of the LED module to provide more appropriate skincare effects. For example, users with UV-sensitive skin may have LED wavelengths related to UV blocking activated more frequently, and be exposed to higher intensity light when exposed to UV radiation.

[0096] Furthermore, the control module can understand how skin sensitivity changes over time through data collected over a predetermined period, and make adjustments to the LED module control based on this. For example, if a user is highly sensitive to skin hydration, the system can be configured to irradiate the LED light for hydration more frequently. Conversely, for users who are less sensitive to skin temperature, the operating frequency of the skin cooling LED module can be reduced according to the data sensed by the temperature sensor.

[0097] Therefore, the control module precisely adjusts the operation of the LED module by reflecting changes in sensing information and sensitivity information in order to provide a user-customized skincare solution, thereby providing an LED treatment effect optimized for the user's skin condition.

[0098] In various embodiments, the sensor module 1122 may include an adhesion sensing sensor module for sensing the state of skin contact. In this case, the control module can generate adhesion state information based on sensing information obtained from the adhesion sensing sensor module and adjust the output intensity and operation status of the plurality of LED modules based on the adhesion state information.

[0099] Specifically, the adhesion sensing module is used to sense the degree of adhesion between the skin and the wearable healthcare device (or patch) in real time and to verify whether the device is properly attached to the skin. In the embodiment, the adhesion sensing module may, but is not limited to, be embodied through a pressure sensor and an electrical impedance sensor.

[0100] In one embodiment, a pressure sensor may detect the physical pressure between the skin and the device to determine whether they are in close contact. For example, if the pressure value exceeds a certain threshold when the patch is in good contact with the skin, the control module may adjust the output intensity so that the LED module operates optimally. On the other hand, if the pressure decreases, the control module may detect that the patch has loosened and reduce the output of the LED module or stop operating altogether.

[0101] Furthermore, in the embodiment, the electrical impedance sensor senses the electrical connection between the skin and the patch to evaluate the degree of adhesion. If the impedance value between the skin and the patch is appropriate, it is received as a signal that the adhesion is good, thereby allowing the LED module to operate normally. If the impedance value is high, it is interpreted as the patch falling off the skin or insufficient adhesion, and the operation of the LED module may be adjusted.

[0102] In one embodiment, since the degree of adhesion can have a significant impact on the effectiveness of the LED treatment, the adhesion sensing sensor plays a role in confirming whether the patch is properly attached and optimizing the operation of the LED module according to the degree of adhesion.

[0103] The control module generates adhesion status information based on sensing information obtained from the adhesion sensing sensor module, thereby analyzing in real time how firmly the patch is adhering to the skin. The adhesion status information helps to automatically reduce the output of the LED module or stop operation when the patch is peeling off the skin or is loosely attached.

[0104] More specifically, based on adhesion status information, the control module can adjust the output intensity of the LED module. For example, if the patch is not adhering to the skin or is detached, the LED light cannot properly reach the skin, so the control module may reduce or completely block the output intensity of the LED module. Conversely, if the adhesion is good, the LED module's output can be kept at maximum to provide sufficient therapeutic effect to the skin.

[0105] Furthermore, the control module can adjust the operation of the LED module according to its attachment status. For example, it can be configured to deactivate the LED module to conserve energy when the patch completely falls off the skin, and to automatically reactivate the LED module when the patch reattaches to the skin.

[0106] Therefore, through the interaction between the adhesion sensing module and the control module, it is possible to provide the optimal LED treatment effect tailored to the adhesion state of the patch, and by continuously monitoring the skin adhesion state, the efficiency and safety of the treatment can be enhanced.

[0107] According to one embodiment of the present invention, the first layer 1110 and the second layer 1130 of the surface layer 1100 are provided through a hydrogel component. That is, the first layer 1110 and the second layer 1130, which are provided on the outer side of the intermediate layer 1120 containing the LED module 1121 and the sensor module 1122, provide flexibility and adhesion through the hydrogel component, thereby maintaining a comfortable wearing experience when attached to the skin. Such a hydrogel component supports the LED module and sensor module contained in the intermediate layer to operate efficiently while in close contact with the skin, while minimizing skin irritation.

[0108] Furthermore, the first layer 1110 and the second layer 1130, which contain hydrogel components, have high transparency, allowing light generated from the LED module to penetrate deep into the skin, thereby maximizing the skin regeneration and improvement effects. This enhances skin adhesion, reduces skin irritation, provides comfort even during prolonged wear, and creates an environment optimized for light diffusion.

[0109] As a result, the first layer 1110 and the second layer 1130 play an important role in supporting the efficient delivery of LED light to the skin through the hydrogel component, thereby increasing skin adhesion and flexibility.

[0110] In one embodiment, the first layer 1110 and the second layer 1130 are constructed based on the unique hydrogel mixture of the present invention, which maintains a high moisture content and a transparent appearance, and can adhere naturally to the skin to provide a comfortable wearing experience. Specifically, the hydrogel mixture of the present invention is made with specific components and precisely adjusted proportions to maximize the suppression of moisture evaporation and the protection of UV-blocking components. This optimized composition ratio simultaneously improves the flexibility and durability of the hydrogel, and can provide a comfortable and stable adhesion even when the patch is in contact with the skin for a long time.

[0111] For example, by mixing a moisture-retaining polymer with components such as a crosslinking agent and a curing agent in appropriate proportions, the structural stability of the hydrogel is ensured, and the lipid-soluble UV-blocking agent plays a role in protecting it from seeping from the intermediate layer to the surface. As a result, the transparent skin patch of the present invention provides excellent performance and durability simultaneously, and can maintain effective UV blocking and moisture protection functions even with prolonged use.

[0112] The hydrogel mixture of the present invention may comprise distilled water, acrylamide, a hydrophilic polymer, methylenebiscrylamide (MBA), and ammonium persulfate (APS).

[0113] In the examples, distilled water acts as the main solvent for the hydrogel, dissolving the polymer components and promoting uniform mixing. Distilled water forms the basis for maintaining the water content of the hydrogel and, when used in conjunction with other barrier components, can sustainably provide the flexibility and adhesion of the hydrogel by suppressing water evaporation.

[0114] Acrylamide is the main monomer of hydrogels and can form the structural basis of them. Acrylamide forms polymer chains through polymerization, a process that determines the mechanical strength and flexibility of the hydrogel. For example, the physical properties of a hydrogel can be altered by the acrylamide content.

[0115] Hydrophilic polymers may be polymeric substances that have hydrophilic properties and absorb moisture. Hydrophilic polymers play a role in improving moisture absorption and retention capabilities. For example, hydrophilic polymers may include at least one of chitin, chitosan, gelatin, hyaluronic acid, carboxymethylcellulose (CMC), and polyvinyl alcohol (PVA). Hydrophilic polymers contribute to hydrogels retaining moisture for extended periods and minimizing skin irritation.

[0116] Methylenebisacrylamide acts as a cross-linker, forming bonds between polymer chains within the hydrogel. These cross-links maintain the structural stability of the hydrogel and increase its mechanical strength, providing robust resistance to external impacts and deformation. In one example, increasing the amount of cross-linker increases the hardness of the hydrogel, but if too much is added, the flexibility of the hydrogel may decrease. Therefore, it is very important to adjust the amount of cross-linker to an appropriate level.

[0117] Ammonium persulfate acts as a radical initiator, initiating the polymerization of acrylamide. It accelerates the polymerization reaction, supporting the rapid and stable formation of the hydrogel. Furthermore, the amount of ammonium persulfate used plays a crucial role in the hydrogel curing process, contributing to the stable maintenance of the hydrogel's morphology and structure.

[0118] The hydrogel mixture of the present invention is designed with an optimized and original recipe, which maximizes various properties such as skin adhesion, flexibility, moisture retention, and transparency.

[0119] In the examples, distilled water is provided in an amount of 50 to 55 parts by weight per 100 parts by weight of the hydrogel mixture, acting as the main solvent for the hydrogel and forming an important base for maintaining moisture content along with uniform mixing of the components. The optimized ratio of distilled water helps the film adhere to the skin for a long period of time while maintaining the moisture content of the hydrogel.

[0120] Acrylamide is provided in an amount of 40 to 45 parts by weight per 100 parts by weight of the hydrogel mixture, contributing as a monomer to form the structural foundation of the hydrogel. The proportion of acrylamide provides a good balance of strength and flexibility in the hydrogel, resulting in a comfortable fit when applied to the skin and durability that can withstand external impacts.

[0121] Hydrophilic polymers are provided in an amount of 5 to 10 parts by weight per 100 parts by weight of the hydrogel mixture. They maximize the water absorption capacity of the hydrogel, minimize skin irritation even during prolonged use, and keep the skin moist. Among these hydrophilic polymers, chitin, chitosan, and gelatin maximize compatibility with the skin while retaining moisture, thereby improving the skin-protective effect of the hydrogel.

[0122] Methylenebisacrylamide is provided in an amount of 0.025 to 0.030 parts by weight per 100 parts by weight of the hydrogel mixture, acting as a crosslinking agent to form bonds between the polymer chains of the hydrogel. These proportions may be optimized to maintain the structural stability of the hydrogel without losing flexibility. While excessive use of crosslinking agents can reduce flexibility, this invention ensures both flexibility and strength through precise adjustments.

[0123] Ammonium persulfate is provided in a ratio of 0.125 to 0.130 parts by weight per 100 parts by weight of the hydrogel mixture, acting as a radical initiator to promote the polymerization reaction of the hydrogel. These ratios allow the hydrogel to cure rapidly and stably, maintaining its form while remaining stable even when applied to the skin.

[0124] The optimized component ratio of the hydrogel mixture described above gives the hydrogel of the present invention properties that differentiate it from conventional products, providing performance as an innovative skin patch that maximizes moisture retention and skin affinity while maintaining transparency and adhesion.

[0125] In various embodiments, the second layer 1130 of the surface layer 1100 is characterized by comprising a first mixture having an ultraviolet blocking function.

[0126] The second layer 1130 may be provided between the intermediate layer 1120 and the skin contact layer 1200. The second layer 1130 is located below the intermediate layer 1120 and in direct contact with it, and can also adhere closely to the skin contact layer 1200, acting as a layer that provides the patch's UV protection function. The second layer 1130 is located in the center of the patch and provides UV protection and moisture retention functions while complementing the external protection function of the first layer 1110 and the skin adhesion function of the skin contact layer 1200.

[0127] The second layer 1130 may be formed by mixing the first mixture, which provides UV blocking functionality, with the second mixture, which includes a hydrogel mixture. More specifically, the second layer 1130 may contain the hydrogel mixture of the present invention as is, while being uniformly mixed with the first mixture containing a lipid-soluble UV blocker to provide UV blocking performance, as well as skin adhesion and moisture retention. In the examples, the first mixture may include UV blocking components such as avobenzone, ethylhexyl salicylate, homosalate, and octocrylene, such UV blocking components that are retained on the skin for a long time in the intermediate layer and exert a sustained UV blocking effect.

[0128] In specific examples, the second layer 1130 may be formed by uniformly mixing a first mixture containing UV-blocking components such as avobenzone, ethylhexyl salicylate, homosalate, and octocrylene with the hydrogel mixture. Each UV-blocking component is present in a specific proportion within the first mixture and is mixed in precisely adjusted proportions to optimize UV-blocking performance.

[0129] The second layer 1130 of the present invention is designed to effectively block both UV-A and UV-B rays. Avobenzone contained in the first mixture plays a role in effectively blocking ultraviolet rays in the UV-A (320-400 nm) region, while ethylhexyl salicylate, homosalate, and octocrylene are components that block ultraviolet rays in the UV-B (280-320 nm) region, and each component exerts a synergistic effect to block both UV-A and UV-B rays simultaneously.

[0130] The first mixture containing such UV-blocking components forms an intermediate layer with the hydrogel mixture of the present invention, thereby maximizing UV-blocking performance while maintaining skin adhesion and moisture retention. UV-A penetrates deep into the skin and can cause wrinkles and skin aging, while UV-B is the main cause of sunburn on the skin's surface. The patch of the present invention plays a role in effectively preventing skin damage by blocking both UV-A and UV-B.

[0131] More specifically, avobenzone is provided in an amount of 10 to 15 parts by weight per 100 parts by weight of the first mixture, and this is a very effective component for blocking UV-A. Although avobenzone is sensitive to ultraviolet light and its effectiveness may decrease when exposed to ultraviolet light, in the present invention, by being mixed with other UV-blocking components in the hydrogel mixture, it can provide long-lasting UV-blocking effects while maintaining stability.

[0132] Ethylhexyl salicylate is provided in an amount of 15 to 20 parts by weight per 100 parts by weight of the first mixture and is an effective ingredient for blocking ultraviolet rays, protecting the skin from ultraviolet rays and increasing the stability of avobenzone.

[0133] Homosalate is provided in an amount of 35 to 40 parts by weight per 100 parts by weight of the first mixture, and plays a role in further enhancing the UV-B blocking performance. Homosalate works in synergy with other UV-blocking agents to provide long-lasting protection against skin damage caused by UV-B.

[0134] Octocrylene is provided in an amount of 35 to 40 parts by weight per 100 parts by weight of the first mixture. In addition to its UV-blocking function, it plays a role in stabilizing UV-blocking agents that may be damaged by UV light. When mixed with avobenzone, it greatly contributes to further enhancing UV resistance and maintaining UV-blocking performance.

[0135] When the first mixture containing such UV-blocking components is mixed with the original hydrogel mixture of the present invention, the second layer 1130 performs a dual function, maximizing UV-blocking function while also providing skin adhesion and moisture retention. The hydrogel mixture supports the stable delivery of the UV-blocking components to the skin, while simultaneously providing a comfortable wearing experience even when the patch is in contact with the skin for extended periods.

[0136] Therefore, the second layer 1130 combines an optimized ratio of UV-blocking components with the flexibility and moisture-retaining properties of the hydrogel, allowing the patch to effectively perform UV-blocking functions for a long period of time while also adhering naturally to the skin and retaining moisture.

[0137] According to one embodiment of the present invention, the second layer 1130 is characterized in that the first mixture and the second mixture are mixed in a ratio ranging from 20 parts by weight to 80 parts by weight to 30 parts by weight to 70 parts by weight, respectively.

[0138] For example, if the first and second mixtures are not mixed in the appropriate proportions according to one embodiment of the present invention, the balance between UV blocking performance and moisture retention may be disrupted. For instance, if the proportion of the UV blocking component is excessively high, the flexibility and adhesion of the hydrogel may decrease, which can prevent the patch from adhering stably to the skin and increase the likelihood of it falling off. Conversely, if the proportion of the hydrogel mixture is excessively high, the UV blocking component may not be distributed at a sufficient concentration, thus reducing UV blocking performance. Such imbalances in proportions can reduce the performance of the patch, so it is important to maintain an appropriate ratio between the first and second mixtures.

[0139] This specific ratio combination optimizes the balance between the UV-blocking component and the hydrogel mixture, maximizing both UV-blocking performance and skin adhesion simultaneously. Specifically, the first mixture consists of a lipid-soluble UV-blocking component that provides UV protection, while the second mixture, the hydrogel mixture, plays a role in minimizing irritation by adhering to the skin for extended periods due to its moisture-retaining and flexible properties. The ratio range of these two mixtures is designed to ensure that the UV-blocking component is effectively delivered to the skin while the high water content of the hydrogel reduces skin irritation and maintains moisturizing effects.

[0140] Furthermore, this ratio setting allows the patch to adhere stably to the skin even when worn for extended periods, and the UV-blocking components can be uniformly dispersed within the hydrogel layer without leaching out, providing sustained protection from ultraviolet rays.

[0141] According to embodiments of the present invention, the second layer 1130 may further comprise zinc oxide (ZnO) and a glycol-based solution.

[0142] In the examples, zinc oxide is dispersed in nanoparticle form to maximize its UV blocking performance, which allows it to effectively absorb and reflect ultraviolet light. Zinc oxide 210 is dispersed in nanoparticle form having a nano (e.g., less than 100 nm) size and plays a role in blocking ultraviolet light (UV-A and UV-B) over a wide area. The nano-sized zinc oxide particles physically reflect or scatter ultraviolet light, increasing the length through which it passes into the second layer 1130, and as a result, increasing the absorption of ultraviolet light by the UV blocker, effectively reducing the amount of ultraviolet light that reaches the skin. Because the nanometer-level particles have a high surface area, the UV blocking performance can be further improved, maximizing the UV blocking function while maintaining the transparency of the patch.

[0143] In the examples, the particles may be provided in the form of at least one of spherical, plate-like, rod-like, or irregular shapes, each of which affects the UV blocking performance of zinc oxide. For example, spherical particles have the property of scattering light uniformly, while rod-like particles scatter light in a specific direction, enabling more efficient UV blocking. Such combinations of nanoparticle shapes allow the patch to adhere naturally to the skin and maintain a transparent appearance while blocking UV rays.

[0144] According to one embodiment, the glycol-based solution plays an important role in uniformly mixing zinc oxide and UV-blocking components with the hydrogel. The glycol solution suppresses water evaporation and supports the uniform distribution of UV-blocking components on the skin. Furthermore, the glycol-based solution improves the water-retention capacity of the hydrogel, allowing the patch to adhere to the skin for extended periods while keeping the skin moist.

[0145] As a specific example, glycol-based solutions may include, but are not limited to, triethylene glycol, polyethylene glycol (PEG), and diethylene glycol. In addition to the glycol substances mentioned above, various glycol-based substances having polyglycol, tetramolecular, or bimolecular structures may be used. These substances can enhance moisture retention, effectively bind the UV-blocking component to the hydrogel, and further improve the transparency, adhesion, and UV-blocking performance of the patch.

[0146] Glycol-based solutions play a role in capturing water, improving the hydrogel's moisture retention capacity and helping to prevent skin dryness even when the patch is in contact with the skin for extended periods. Furthermore, glycol-based solutions function similarly to soap, playing a crucial role in binding the lipid-soluble UV-blocking components to the hydrogel mixture. This allows the lipid-soluble UV-blocking agent, UV oil, to be uniformly mixed with the hydrogel mixture to form a second layer 1130, supporting the uniform delivery of the UV-blocking components to the skin.

[0147] Furthermore, the examples may also include a skin contact layer 1200 that is in contact with one surface of the surface layer 1100 and is composed of a hydrogel mixture.

[0148] The skin contact layer 1200 is in contact with the second layer 1130 of the surface layer 1100 and may be composed of the hydrogel mixture of the present invention. Due to the flexibility and moisture retention capacity of the hydrogel, the skin contact layer provides a comfortable wearing experience while adhering closely to the skin for extended periods, minimizing skin irritation.

[0149] Furthermore, the skin contact layer may also contain drug delivery components, thereby providing not only skin protection but also skin health improvement functions. For example, the skin contact layer 1200 may contain components such as collagen, panthenol, hyaluronic acid, and vitamin C, which may provide increased skin elasticity, moisturizing, wrinkle reduction, and whitening effects.

[0150] For example, collagen enhances skin elasticity, panthenol promotes skin regeneration and hydration, hyaluronic acid retains moisture in the skin, and vitamin C contributes to skin whitening and wrinkle improvement through its antioxidant effects.

[0151] In addition to the aforementioned ingredients, the formula may also contain ingredients that provide soothing and anti-inflammatory effects, such as aloe vera extract and green tea extract, as well as anti-aging ingredients such as retinol and niacinamide. Antibacterial and wound-healing ingredients such as tea tree oil and salicylic acid may also be added, and various functional ingredients such as antioxidants, whitening agents, and moisturizers may be included as needed.

[0152] Therefore, the skin contact layer 1200 of the present invention provides skin adhesion and moisture retention based on the hydrogel mixture, and can also perform functions such as effective nutrient delivery, elasticity improvement, moisturizing, and soothing to the skin as a drug delivery system.

[0153] According to one embodiment of the present invention, the surface layer 1100 and the skin contact layer 1200 are detachably provided. In particular, the skin contact layer 1200 is designed to be replaceable, offering the advantage of being easily replaced according to the user's needs.

[0154] The replaceable skin contact layer 1200 is extremely useful for maintaining the hygiene of the patch. For example, after a user has worn the patch for a long time throughout the day, the skin contact layer 1200 can be replaced to remove impurities such as sweat and dust that have accumulated on the skin. This is not only for hygienic reasons, but also reduces unnecessary irritation to the skin and helps prevent problems and skin sensitivity. It also minimizes skin irritation and fatigue from prolonged use at the skin contact site, making it suitable for users with sensitive skin.

[0155] Specifically, various types of skin contact layers 1200 can be provided to suit the user's skin condition and needs. For example, if moisturizing function is required, a skin contact layer 1200 containing moisturizing ingredients such as hyaluronic acid and glycerin can be provided, and if skin soothing is required, a skin contact layer containing soothing ingredients such as aloe vera and green tea extract can be selected. In addition, in environments where prolonged exposure to ultraviolet rays is likely, a skin contact layer 1200 containing UV-blocking ingredients can be utilized, allowing users to protect their skin according to various environments and situations.

[0156] This replaceable structure not only extends the lifespan of the patch but also provides continuously effective skincare. For example, while retaining the core functions of the patch, the sensor module and LED module, only the skin contact layer 1200 can be replaced, allowing for optimized management tailored to the skin's condition. Users can quickly select and apply the skin contact layer 1200 containing the appropriate ingredients according to changes in their skin condition, receiving a customized skincare solution.

[0157] As a result, through the configuration of the replaceable skin contact layer 1200, the patch of the present invention enables personalized skincare and can continuously provide efficient skincare effects while minimizing hygiene and skin irritation even with long-term use.

[0158] As described above, the transparent skin patch 1000 of the present invention is equipped with a sensor module 1122 and a plurality of LED modules 1121 in an intermediate layer 1120 located between the first layer 1110 and the second layer 1130, thereby enabling real-time monitoring of the skin condition and control of the LED modules based on this. The LED modules can provide various skin improvement effects such as increased skin elasticity, wrinkle reduction, and improved skin whitening, and the sensor module can sense various biological information such as skin moisture content, temperature, and degree of UV exposure, and can automatically adjust the output intensity and operation status of the LED modules.

[0159] This allows the wearable healthcare device 100, including a transparent skin patch, to provide LED light therapy optimized to the user's skin condition, offering an effective, customized skincare solution that analyzes and adjusts the skin condition in real time while in close contact with the skin.

[0160] Furthermore, the second layer 1130 is an ultraviolet (UV) blocking layer that effectively blocks UV rays and protects the skin from them. In this case, the first layer 1110 prevents the lipid-soluble UV blocking components contained in the second layer 1130 from seeping out, and supports the UV blocking components to act stably on the skin for a long period of time. This structure ensures the sustainability of the UV blocking performance and further improves the functionality of the patch.

[0161] Furthermore, the transparent skin patch 1000 contains the hydrogel mixture of the present invention in all layers, ensuring moisture retention, excellent adhesion, and high transparency. Due to the properties of the hydrogel, the patch adheres naturally to the skin, retains moisture even during prolonged use, and minimizes skin irritation. As a result, the transparent skin patch 1000 provides a comfortable wearing experience while maintaining stable adhesion over a long period of time.

[0162] Furthermore, the skin contact layer 1200 can further enhance drug delivery, effectively delivering functional ingredients such as collagen, panthenol, and hyaluronic acid to the skin. This can lead to various skin improvement effects, including increased skin elasticity, moisturizing effects, and skin soothing.

[0163] In other words, the wearable healthcare device 100, which includes a transparent skin patch of the present invention, is a highly functional multilayer patch that provides an effective customized skincare solution by analyzing the skin condition in real time and adjusting the light, while also ensuring UV protection, moisture retention, adhesion, and even skin improvement functions through drug delivery, thus providing excellent effects for skin protection and management.

[0164] Whether the transparent skin patch 1000 of the present invention exhibits UV blocking effect, skin adhesion, and moisture retention effect can be confirmed through the following experimental examples.

[0165] Experimental Example 1: Adhesion Test This experiment was conducted to confirm the adhesive strength of patches produced through the hydrogel mixture of the present invention to the skin. This allowed us to evaluate how stably a hydrogel material with a Young's modulus similar to that of skin maintains its adhesive strength on the surface of real skin.

[0166] The materials used in this experiment included a patch to which the hydrogel material of the present invention was applied, and pig skin, which has physical properties similar to human skin. The adhesive strength of the hydrogel patch of the present invention was evaluated using pig skin under conditions similar to those of human skin. Test equipment such as an adhesion tester, strain gauge, and high-resolution microscope were used to measure the adhesive strength.

[0167] First, after cleaning the surface of the pig's skin, a transparent patch coated with the hydrogel material of the present invention was attached to the surface of the pig's skin. After applying light pressure to secure the hydrogel patch to ensure complete adhesion to the skin surface, an adhesion test was performed. To evaluate the adhesive strength of the hydrogel patch, the stress (kPa) was measured based on the strain (%). The results showed that even with a strain close to 200% in the strain test, the hydrogel patch adhered strongly to the pig's skin, and the adhesive strength did not decrease significantly.

[0168] Strain (%) refers to the strain rate and indicates how much the hydrogel patch can stretch. In other words, it is the percentage of how much the patch stretches while attached to the skin. Stress (kPa) indicates the degree to which the hydrogel patch resists pressure or force applied while attached to the skin and is an important indicator for evaluating adhesion strength.

[0169] As shown in the graph in Figure 8, stress increases with increasing strain, but even at strains close to 200%, the adhesive strength (stress) of the hydrogel patch did not decrease significantly. This indicates that the hydrogel patch maintains its adhesive strength stably even when the skin deforms, i.e., when the skin stretches or moves. From this, we can conclude that the hydrogel patch can maintain stable adhesive strength even when used for a long time in close contact with the skin. In other words, it means that the hydrogel patch maintains strong adhesive strength even with skin movement and stretching.

[0170] Furthermore, adhesive strength tests recorded a shear stress of 36 kPa, indicating that the hydrogel patch maintains strong adhesion to the skin. This strong adhesion is confirmed to be maintained for a long period of time due to the water-retaining and flexible properties of the hydrogel material.

[0171] Finally, microscopic observation of the close bond between the pig skin and the hydrogel patch confirmed that effective hydrogen bonds were formed between the hydrogel patch and the pig skin, resulting in strong adhesion to the skin surface. This type of bonding structure significantly improves the adhesive performance of the hydrogel. As a result, this experiment demonstrated that the hydrogel patch of the present invention exhibits strong adhesion under conditions similar to those of skin and maintains a stable adhesion even during prolonged use. Furthermore, the high water content and flexibility of the hydrogel material resulted in excellent adhesive performance in strain tests.

[0172] Experimental Example 2: Biocompatibility Test The biocompatibility test was conducted through in vitro cell experiments to confirm whether the hydrogel material of the present invention functions appropriately in a biological environment when it is in prolonged contact with the skin. The NIH 3T3 cell line was used in the experiment, and these cells are fibroblasts of the skin that play an important role in skin regeneration and healing.

[0173] First, in the experimental preparation process, the hydrogel of the present invention was placed as a sample on a culture dish containing NIH 3T3 cells, as shown in Figure 9. The hydrogel was attached to the culture dish so as to be in direct contact with the cells, and the experiment was conducted in a manner that evaluated the interaction between the cells and the hydrogel. High-resolution microscopy and fluorescence staining were used to confirm the presence or absence of cell growth and deformation during the experiment. Cell viability and morphological changes were visually confirmed through fluorescence staining, and it was evaluated whether the hydrogel material induced toxicity in the cells.

[0174] As shown in Figure 9, the experimental results demonstrated that the hydrogel material of the present invention did not induce cytotoxicity, and NIH 3T3 cells survived and proliferated normally. In particular, the hydrogel material maintained its non-swelling properties despite prolonged contact with cells and showed almost no structural deformation, demonstrating that it does not excessively absorb moisture or deform even when used for extended periods in the body environment. Furthermore, it was possible to confirm that cells differentiated and grew normally on the surface of the hydrogel.

[0175] This confirms that the hydrogel material of the present invention does not cause problems even when in contact with the skin for a long period of time and acts harmlessly on the human body.

[0176] The description of the presented embodiments is provided so that any person with ordinary skill in the art of the invention may utilize or implement the invention. Various modifications to such embodiments are obvious to a person with ordinary skill in the art of the invention, and the general principles defined herein can be applied to other embodiments without departing from the scope of the invention. Accordingly, the invention is not limited to the embodiments presented herein and should be interpreted in the broadest sense consistent with the principles and novel features presented herein. [Explanation of symbols]

[0177] 1000 Transparent Skin Patches 10 Hydrogel film 1100 Surface layer 1110 First layer 1120 Second layer 1130 Third Layer 1200 Skin contact layer

Claims

1. It is composed of a hydrogel mixture, and comprises a surface layer that forms the surface, A skin contact layer that is in contact with one surface of the surface layer and is composed of the hydrogel mixture, Includes, The aforementioned surface layer is It includes a first layer, a second layer, and an intermediate layer formed between the first layer and the second layer. The intermediate layer is characterized by comprising a plurality of LED modules. A wearable healthcare device including a transparent patch for skin attachment.

2. The hydrogel mixture is It contains distilled water, acrylamide, hydrophilic polymer, methylenebisacrylamide (MBA), and ammonium persulfate (APS), The aforementioned hydrophilic polymer is a polymeric substance that has hydrophilic properties and absorbs moisture. A wearable healthcare device comprising a transparent skin-adhering patch according to claim 1, comprising at least one of chitin, chitosan, gelatin, hyaluronic acid, carboxymethylcellulose (CMC), and polyvinyl alcohol (PVA).

3. The distilled water is provided in an amount of 50 to 55 parts by weight per 100 parts by weight of the hydrogel mixture. The acrylamide is provided in an amount of 40 to 45 parts by weight per 100 parts by weight of the hydrogel mixture. The hydrophilic polymer is provided in an amount of 5 to 10 parts by weight per 100 parts by weight of the hydrogel mixture. The methylenebisacrylamide is provided in an amount of 0.025 to 0.030 parts by weight per 10 parts by weight of the hydrogel mixture. The wearable healthcare device comprising a transparent patch for skin attachment according to claim 2, characterized in that the ammonium persulfate is provided in an amount of 0.125 to 0.130 parts by weight per 100 parts by weight of the hydrogel mixture.

4. A wearable healthcare device comprising a transparent patch for skin attachment according to claim 1, characterized in that the surface layer and the skin contact layer are detachably provided.

5. The aforementioned intermediate layer includes, The system includes a transparent electrode connecting the multiple LED modules, a sensor module for obtaining sensing information related to skin health, and a control module for controlling the multiple LED modules based on the sensing information. A wearable healthcare device comprising a transparent patch for skin attachment as described in claim 1.

6. The control module is A wearable healthcare device including a transparent patch for skin attachment according to claim 5, comprising: generating control information for controlling the plurality of LED modules based on the sensing information; analyzing changes in the sensing information collected over a predetermined period of time; generating user sensitivity information; and correcting the control information in accordance with the user sensitivity information.

7. The aforementioned sensor module is Includes a contact sensing sensor module for detecting skin contact status, The control module is A wearable healthcare device including a transparent patch for skin attachment according to claim 5, wherein adhesion state information is generated based on sensing information obtained from the adhesion sensing sensor module, and the output intensity and operation status of the plurality of LED modules are adjusted based on the adhesion state information.

8. The second layer comprises a first mixture having an ultraviolet blocking function, The first mixture is It contains avobenzone, ethylhexyl salicylate, homosalate, and octocrylene. The avobenzone is provided in an amount of 10 to 15 parts by weight per 100 parts by weight of the first mixture. The ethylhexyl salicylate is provided in an amount of 15 to 20 parts by weight per 100 parts by weight of the first mixture. The homosalate is provided in an amount of 35 to 40 parts by weight per 100 parts by weight of the first mixture. The wearable healthcare device comprising a transparent patch for skin attachment according to claim 1, characterized in that the octocrylene is provided in an amount of 35 to 40 parts by weight per 100 parts by weight of the first mixture.

9. The aforementioned second layer is, A wearable healthcare device comprising a transparent patch for skin attachment according to claim 8, wherein the first mixture and the hydrogel mixture are mixed in a ratio range from 20 parts by weight to 80 parts by weight to 30 parts by weight to 70 parts by weight, respectively.

10. In a skin health management method utilizing the apparatus described in claim 1, Steps to collect sensing information related to skin health, The steps include: analyzing the sensing information to generate control information for controlling multiple LED modules; A method for managing skin health, comprising the step of controlling the plurality of LED modules based on the control information.

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