Light output device for scalp care including thin film-type heat dissipation sheet

Abstract

The present invention relates to a light output device for scalp care, the device including a thin film-type heat dissipation sheet. The heat dissipation sheet is composed of an insulation layer and a heat diffusion layer and thus effectively blocks and disperses heat generated inside the device. Accordingly, the skin of a user can be protected from the heat of the device, and internal components can be prevented from overheating, thus improving the durability and stability of the device.

Description

A light output device for scalp care comprising a thin-film heat-dissipating sheet

[0001] The present invention relates to a light output device, and more particularly, to a light output device for scalp care including a thin film heat dissipation sheet.

[0002]

[0003] Modern people recognize their appearance as an important factor in communicating and expressing themselves to others, and accordingly, they invest a lot of time and money in managing their appearance to overcome their flaws.

[0004] Hair loss can be caused by a variety of factors, including environmental, genetic, psychological, and hormonal imbalances. While hair loss has traditionally primarily affected middle-aged and older adults, it's also increasingly affecting men in their 20s and 30s. Young women are also increasingly affected by hair loss due to nutritional deficiencies stemming from excessive dieting, frequent perms, and hair dyeing. In response to this trend, various scalp care devices have been developed to prevent or treat hair loss.

[0005] Low-level laser therapy (LLLT) is a treatment that uses light of a specific wavelength to stimulate metabolism and activate tissue function. The laser light used in LLLT penetrates tissue and activates cellular ions, resulting in increased capillary formation, increased blood oxygen concentration, and collagen production.

[0006] Based on this low-power laser therapy, methods and devices are emerging to promote hair growth by irradiating the scalp with laser light to activate hair follicles and the biological tissues surrounding the hair follicles.

[0007] However, in the case of a device that irradiates laser light to the scalp as described above, multiple light sources (LEDs, etc.) are arranged so that light is output toward the user's skin.

[0008] If heat from a light source comes into direct contact with the skin or is transmitted at close range, it can cause excessive temperature rises, potentially damaging the skin barrier. Prolonged exposure, in particular, poses a risk of localized inflammation or burns due to heat, increasing the likelihood of persistent discomfort for the user.

[0009] However, in environments with limited internal space, such as scalp care devices, existing insulation materials are difficult to apply, failing to effectively block and disperse heat. Therefore, a structure that minimizes direct heat contact with the skin and effectively disperses heat is needed.

[0010]

[0011] In order to solve the above problems, the present invention aims to provide a thin-film heat dissipation sheet that can be applied even in very narrow spaces.

[0012] In addition, the present invention aims to provide a safe scalp care environment by applying a heat dissipation sheet capable of effective insulation and heat diffusion to a scalp care device.

[0013] The problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0014]

[0015] A light output device for scalp care comprises: a dome-shaped outer case forming an exterior; an inner case formed inside the outer case; a plurality of light sources arranged in a space between the outer case and the inner case; a control unit arranged in the space between the outer case and the inner case; and a thin-film heat-dissipating sheet positioned adjacent to the control unit, wherein the thin-film heat-dissipating sheet may include: an insulating layer made of a flexible material including an aerogel; and a heat diffusion layer formed on one surface of the insulating layer.

[0016] The control unit may be disposed on the rear side of the space between the outer case and the inner case, and the thin film heat dissipation sheet may be disposed in the space between the control unit and the inner case.

[0017] The above thin film heat dissipation sheet may further include a coating layer attached to one surface of the insulating layer or one surface of the heat diffusion layer.

[0018] The coating layer may be formed on the other side of the insulating layer, one side of the thermal diffusion layer, a side surface of the insulating layer, and a side surface of the thermal diffusion layer, thereby wrapping the insulating layer and the thermal diffusion layer.

[0019] The above thermal diffusion layer can be formed on both sides of the above insulation layer.

[0020] The above insulating layer may include glass fibers and silica gel particles having a diameter of 2 to 50 nm.

[0021] The ratio of the above glass fibers and silica gel particles can be substantially 7 to 3.

[0022] The above thermal diffusion layer can be formed of expanded graphite.

[0023] The thickness of the above insulation layer may be 0.5 mm or less.

[0024] The thickness of the above heat diffusion layer may be 0.4 mm or less.

[0025] The above thin film heat dissipation sheet may have a total cross-sectional thickness of 1 mm or less.

[0026]

[0027] According to at least one embodiment of the present invention, by using an aerogel insulation sheet and a heat diffusion sheet in combination, effective heat management can be achieved even within a narrow device.

[0028] In addition, according to at least one embodiment of the present invention, the internal temperature of the device can be maintained uniformly through the insulation and heat dissipation sheet, thereby preventing performance degradation due to overheating of electronic components and enabling stable operation for a long time.

[0029] Additionally, according to at least one embodiment of the present invention, the heat generated from the device can be effectively blocked or dispersed to minimize direct heat contact with the skin, thereby reducing the risk of skin irritation and burns.

[0030] Further scope of the applicability of the present invention will become apparent from the detailed description below. However, since various modifications and variations within the spirit and scope of the present invention will become apparent to those skilled in the art, it should be understood that the detailed description and specific examples, such as preferred embodiments of the present invention, are given by way of example only.

[0031]

[0032] FIG. 1 is a perspective view of a light output device for scalp care according to one embodiment of the present invention.

[0033] Figure 2 is an exploded perspective view of the care body of the light output device illustrated in Figure 1, viewed from above.

[0034] Figure 3 is an exploded perspective view of the care body of the light output device illustrated in Figure 1, viewed from below.

[0035] Figure 4 is a drawing to more specifically explain the support included in the care body.

[0036] Figure 5 is a bottom view of the care light source mounting part included in the care body.

[0037] Fig. 6 is a bottom view of the care body of the light output device illustrated in Fig. 1.

[0038] Fig. 7 is a drawing for explaining the care body of the present invention having an arrangement of light sources based on hair loss type.

[0039] FIG. 8 is a drawing for explaining the position of a thin film heat dissipation sheet according to one embodiment of the present invention.

[0040] Fig. 9 is a cross-sectional schematic diagram of a thin film heat dissipation sheet according to one embodiment of the present invention.

[0041] Figure 10 is a cross-sectional schematic diagram of a thin film heat dissipation sheet according to another embodiment of the present invention.

[0042] Fig. 11 is a block diagram showing a control configuration of a light output device for scalp care according to an embodiment of the present invention.

[0043]

[0044] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components are given the same reference numbers and redundant descriptions thereof will be omitted.

[0045] The suffixes "module" and "part" used in the following description are assigned or used interchangeably solely for the convenience of writing the specification, and do not in themselves have distinct meanings or roles. Furthermore, when describing the embodiments disclosed herein, if a detailed description of a related known technology is deemed to obscure the gist of the embodiments disclosed herein, the detailed description will be omitted.

[0046] In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

[0047] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0048] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0049] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0050] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0051]

[0052] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached to this specification.

[0053] FIG. 1 is a perspective view of a light output device for scalp care according to one embodiment of the present invention.

[0054] Referring to Fig. 1, a light output device (1) for scalp care (hereinafter referred to as a "light output device") according to an embodiment of the present invention can be implemented to be worn on a user's head and output light to the user's scalp. This light output device (1) can provide a function of promoting hair growth by activating hair follicle cells, increasing capillary production, increasing blood oxygen concentration, and promoting collagen production by outputting the light.

[0055] Such an optical output device (1) may include a care body (2), a circumference adjustment unit (4), and an operating device (5).

[0056] The care body (2) is formed in a dome shape to correspond to the shape of a human head, so that light can be evenly irradiated to the user's scalp.

[0057] According to an embodiment, the care body (2) may be formed so that the front curvature is higher than the rear curvature when viewed from above in terms of similarity to the shape of a human head, but this is not necessarily the case.

[0058] That is, in this specification, the term "dome" refers to a concept that includes not only the geometric dome itself, but also a shape similar to a dome. In this specification, a shape similar to a dome may mean a shape that has an arched (or streamlined) shape in each of the left-right and front-back directions.

[0059] The care body (2) may be equipped with a plurality of light sources that output light for scalp care of the user. The plurality of light sources may include laser light sources (e.g., laser diodes) and LEDs that output laser light. For example, the plurality of light sources may emit red light with a wavelength of about 630 nm to 670 nm, but is not limited thereto, and may emit red light or infrared light. Red light may promote hair growth through the activation of hair follicle cells, etc.

[0060] Meanwhile, the laser light emitted by the laser light source is stronger than the light emitted from the LED and can penetrate deeper into the skin, thereby providing a higher scalp care effect. Accordingly, the laser light source within the care body (2) is positioned to irradiate the laser light to an area of ​​the scalp where scalp care is more necessary when worn by the user, thereby enabling intensive care for the area. The care light source unit provided in the care body (2) will be described in more detail with reference to the drawings below.

[0061] Meanwhile, the care body (2) may further include various sensors, such as a sensor for measuring the user's scalp condition (temperature, humidity, etc.), at least one sensor for detecting the user's hair loss type, and a sensor for detecting whether or not a light output device is worn.

[0062] The circumference adjustment part (4) is formed at the lower end of the care body (2) and can come into contact with the side circumference of the head when worn by a user. The circumference adjustment part (4) may include a structure that can be adjusted in length to accommodate the side circumference of the head of various users. By means of the circumference adjustment part (4), the care body (2) can be stably worn on the user's head and light can be irradiated to the scalp.

[0063] Meanwhile, the optical output device (1) may further include a user operation device (5) connected to the care body (2). For example, the user operation device (5) may be connected to the care body (2) by wire via a cable (52), etc., but this is not necessarily the case and may also be connected wirelessly via a wireless communication method.

[0064] For example, the user operation device (5) may be formed in a cylindrical shape so that the user can easily hold and use it by hand. The user operation device (5) may be provided with at least one button as an input unit for operating the optical output device (1).

[0065] The user operation device (5) can provide an interface for the user to turn the power of the care body (2) on / off or set the operation mode of the care body (2). Since the user operation device (5) is implemented as a separate configuration from the care body (2), the user can conveniently control the operation of the care body (2) using the user operation device (5) even while wearing the care body (2).

[0066] Additionally, the user control device (5) may be equipped with a battery that provides power for the operation of the optical output device. By equipping the user control device (5) with a battery, the weight of the care body (2) can be minimized, thereby minimizing user discomfort. The control components included in the user control device (5) will be described later with reference to FIG. 11.

[0067] With reference to FIGS. 2 to 7 below, embodiments related to the structure of the care body (2) and the arrangement of light sources will be described in more detail.

[0068] Fig. 2 is an exploded perspective view of the care main body of the light output device illustrated in Fig. 1, viewed from above. Fig. 3 is an exploded perspective view of the care main body of the light output device illustrated in Fig. 1, viewed from below. Fig. 4 is a drawing for more specifically explaining the support included in the care main body. Fig. 5 is a bottom view of the care light source mounting part included in the care main body.

[0069] Referring to FIGS. 2 and 3, the care body (2) may include an outer case (21), a support part (22), a light guide part (23), a care light source mounting part (24), and an inner case (25).

[0070] The outer case (21) can form the overall appearance of the care body (2). For example, the outer case (21) can be made of a material such as plastic or SUS (stainless steel), and can protect the internal components of the care body (2) from the outside. Meanwhile, the outer case (21) can be formed opaque, and can block light emitted from laser light sources or LEDs placed inside from being irradiated to the outside.

[0071] According to an embodiment, the outer case (21) may be formed with a lateral opening (212) and / or an upper opening (214). When the care body (2) is worn, air may circulate between the inside of the care body (2) (the space between the care body (2) and the head) and the outside of the care body (2) through the lateral opening (212) and / or the upper opening (214). Accordingly, heat generated by the operation of the light sources of the care body (2) may be effectively dissipated to the outside, thereby preventing a deterioration in the performance of the light sources.

[0072] Referring to FIGS. 2 to 4, a support member (22) may be provided on the lower side of the outer case (21).

[0073] The support body (221) that forms the overall outer shape of the support (22) can be formed in an arch shape in each of the left-right direction and the front-back direction in correspondence with the shape of the outer case (21).

[0074] The support member (22) may be fastened to the inner surface of the outer case (21), but this is not necessarily the case. For example, when the support member (22) is implemented to be fastened to the inner surface of the outer case (21), at least one fastening groove (222) may be formed in the support member body (221), and at least one fastening protrusion corresponding to the at least one fastening groove (222) may be formed in the inner surface of the outer case (21). Meanwhile, at least one fastening groove (222) may also function as an opening that enables air circulation between the inside and the outside of the care body (2).

[0075] Meanwhile, the support member (22) can support and fix the light guide member (23) and the care light source mounting member (24) to the outer case (21) and / or the inner case (25).

[0076] Referring to FIG. 4, at least one light guide unit fastening groove (223) may be formed in the support unit body (221). For example, at least one light guide unit fastening groove (223) may be formed in the form of an opening in a portion of the support unit body (221). By inserting the laser light source mounting portion (232) of the light guide unit (23) into the light guide unit fastening groove (223), the light guide unit (23) may be supported and fixed by the support unit (22).

[0077] Additionally, a plurality of PCB fixing parts (224) can be formed on the lower surface of the support body (221).

[0078] For example, each of the plurality of PCB fixing portions (224) may form an accommodation space into which a plurality of insertion protrusions formed on the upper surface of the care light source mounting portion (24) are inserted and received. When the plurality of insertion protrusions are formed in a circular or cylindrical shape, the PCB fixing portion (224) may be implemented as a circular ring-shaped protrusion as illustrated in FIG. 4. In this case, the outer diameter of the plurality of insertion protrusions is formed to be equal to or smaller than the inner diameter of the PCB fixing portion (224), so that the plurality of insertion protrusions may be received and fixed in the accommodation space. The above embodiment is for convenience of explanation, and the shape of the plurality of PCB fixing portions (224) is not limited thereto, and the plurality of PCB fixing portions (224) may be implemented in various shapes for fixing and supporting the care light source mounting portion (24).

[0079] According to an embodiment, the support body (221) may further be formed with a temperature / humidity sensor fixing portion (225) and an image sensor fixing portion (226). The temperature / humidity sensor fixing portion (225) may be formed to correspond to an upper portion of a temperature / humidity sensor mounted on a care light source mounting portion (24) to fix and support the temperature / humidity sensor. The image sensor fixing portion (226) may be implemented as an opening through which an upper portion of an image sensor mounted on a care light source mounting portion (24) passes and is fixed and supported.

[0080] That is, the care light source mounting portion (24) can be fixed and supported to the support portion (22) by the PCB fixing portion (224), the temperature / humidity sensor fixing portion (225), and the image sensor fixing portion (226). Meanwhile, depending on the embodiment, the support portion (22) may be provided with a fastening portion that is directly fastened to the care light source mounting portion (24) to fix and support the care light source mounting portion (24).

[0081] Referring to FIGS. 2 and 3, the light guide portion (23) and the care light source mounting portion (24) can be provided between the support portion (22) and the inner case (25).

[0082] The light guide unit (23) may include a plurality of light guide mechanisms (231) and a laser light source mounting unit (232) in which a first laser light source corresponding to each of the plurality of light guide mechanisms (231) is provided.

[0083] Each of the plurality of light guide mechanisms (231) can distribute and irradiate laser light emitted from a corresponding first laser light source to a plurality of areas. The first laser light source can be positioned so as not to irradiate laser light directly toward the user's head (or toward the inner case).

[0084] The above light guide mechanism (231) is formed in a rod shape, and the first laser light source can emit laser light in the longitudinal direction of the light guide mechanism (231).

[0085] In particular, the light guide mechanism (231) may be arranged at an angle closer to the tangent line than the vertical line at the position where the longitudinal direction corresponds to the inner case (25). For example, the light guide mechanism (231) may be arranged so that the longitudinal direction is parallel to the tangent line, but this is not necessarily the case.

[0086] This light guide mechanism (231) can reflect the laser light emitted from the first laser light source and irradiate it toward the user's head (or toward the inner case).

[0087] Specific details regarding the light guide mechanism (231) will be described in more detail later with reference to FIGS. 8 to 12.

[0088] The laser light source mounting unit (232) may include a plurality of PCBs, each of which is equipped with at least one first laser light source. While FIGS. 2 and 3 illustrate a laser light source mounting unit (232) including three PCBs, the number of PCBs is not limited thereto. Alternatively, the PCB may be implemented as a flexible PCB (FPCB).

[0089] The light guide mechanism (231) can be fastened to the laser light source mounting portion (232). In particular, the light guide mechanism (231) can be fastened to correspond to the position of the first laser light source mounted on the laser light source mounting portion (232).

[0090] By inserting the laser light source mounting portion (232) into the light guide portion fastening groove (223) of the support portion (22), the light guide portion (23) can be fixed and supported on the support portion (22).

[0091] A plurality of second laser light sources (laser diodes) and a plurality of LEDs may be mounted on the care light source mounting portion (24), and a circuit pattern may be formed to supply power to the plurality of second laser light sources and the plurality of LEDs. For example, the plurality of second laser light sources and the plurality of LEDs may be arranged to irradiate light toward the lower portion of the care light source mounting portion (24) (toward the inner case (25)).

[0092] In this regard, referring to FIG. 5, the care light source mounting portion (24) may include a substrate (241). The substrate (241) may be implemented as a flexible FPCB. Accordingly, the care light source mounting portion (24) may be bent into a dome shape (or arch shape) corresponding to the shapes of the outer case (21) and the inner case (25). The care light source mounting portion (24) may be fixed and supported by the above-described support portion (22), thereby stably maintaining the bent state.

[0093] Meanwhile, the substrate (241) may include a plurality of openings (243) each formed at a position corresponding to some of the plurality of light guide mechanisms (231). The area of ​​the openings (243) may be equal to or larger than the area of ​​the light guide mechanism (231). The light guide mechanism (231) may be disposed on the corresponding opening (243), or a portion thereof, including the lower surface, may penetrate the opening (243) and be disposed on the lower portion of the substrate (241).

[0094] Accordingly, laser light emitted from each of the plurality of light guide devices (231) can be irradiated to the user's scalp through an opening (243) formed at a corresponding location.

[0095] Meanwhile, a plurality of branch substrates (242) may be formed at one edge of the substrate (241). The plurality of branch substrates (242) may extend from one edge of the substrate (241). In FIG. 5, an example is shown in which the plurality of branch substrates (242) extend radially from one edge of the substrate (241), but this is not necessarily the case.

[0096] For example, the substrate (241) may have three corners formed in a square shape, and the remaining corner may include two straight sections and a curved section formed between the two straight sections. The curved section may be formed to be convex in the outward direction of the substrate (241). The plurality of branch substrates (242) may each extend from the curved section.

[0097] A plurality of branch substrates (242) may be formed to be spaced apart from each other by a predetermined distance. In addition, the branch substrates (242) located at the edge may be formed to be spaced apart from one edge of the substrate (e.g., the straight portion) by a predetermined distance. Accordingly, a plurality of gap regions (244) may be formed between the plurality of branch substrates (242) and between the branch substrates (242) located at the edge and the substrate (241). The plurality of gap regions (244) may be formed to correspond to light guide mechanisms (231) that are relatively forwardly positioned among the plurality of light guide mechanisms (231). The light guide mechanism (231) may be positioned on the corresponding gap region (244), or a portion including the lower surface may be positioned on the lower side of the substrate (241) by penetrating the gap region (244).

[0098] Accordingly, the laser light emitted from each of the light guide devices (231) arranged in front can be irradiated to the user's scalp through the gap regions (244).

[0099] Meanwhile, a plurality of second laser light sources (245) and LEDs (246) can be arranged spaced apart from each other on the lower surface of the substrate (241).

[0100] The output of the second laser light source (245) may be lower than the output of the first laser light source (1000; see FIG. 11) provided in the light guide unit (23), but this is not necessarily the case. In addition, the output of the LEDs (246) may be lower than the output of each of the first laser light source (1000) and the second laser light source (245).

[0101] Meanwhile, the number of first laser light sources (1000) may be less than the number of second laser light sources (245), and the number of second laser light sources (245) may be less than the number of LEDs (246).

[0102] The laser light source (1000, 245) and the LED (246) may output red light. For example, the red light may have a wavelength of about 630 nm to 670 nm, but this is not necessarily the case. Depending on the embodiment, the laser light source (1000, 245) and the LED (246) may also output infrared light having a wavelength of about 780 nm to 1 mm.

[0103] Meanwhile, each of the second laser light sources (245) may be equipped with a photodiode (264) that senses the amount of light. The light output device (1) can accurately detect the user's hair loss condition or hair loss type by using an image sensor (262) and a plurality of photodiodes (264).

[0104] In addition, a temperature / humidity sensor mounting area (247) in which a temperature / humidity sensor (266; see FIG. 6) is mounted, and an image sensor mounting area (248) in which an image sensor (262; see FIG. 6) is mounted may be formed on the substrate (241). For example, each of the temperature / humidity sensor mounting area (247) and the image sensor mounting area (248) may be formed closer to the center than the edge of the substrate (241), so that they may be positioned on the user's parietal region (or crown) when the care body (2) is worn. Accordingly, the temperature / humidity sensor (266) can effectively detect heat or moisture generated from the user's head. In addition, the image sensor (262) can effectively obtain an image for detecting hair loss on the parietal region or crown.

[0105] Meanwhile, the care light source driver that drives the plurality of laser light sources and the plurality of LEDs, and the sensor controller that controls the image sensor (262), temperature / humidity sensor (266), etc., may be implemented on a separate PCB provided inside or outside the care main body (2). Depending on the embodiment, the care light source driver and the sensor controller may also be implemented on the care light source mounting portion (24).

[0106] Referring to FIGS. 2 and 3, the inner case (25) can be formed on the innermost side of the care body (2). The above-described support member (22), light guide member (23), and care light source mounting member (24) can be accommodated between the outer case (21) and the inner case (25) and protected from the outside.

[0107] The inner case (25) may have a dome shape corresponding to the shape of the outer case (21). The inner case (25) may be smaller in size than the outer case (21), but this is not necessarily the case.

[0108] The inner case (25) is made of a material such as transparent plastic or silicone, so that light emitted from the laser light sources and LEDs housed inside can pass through the inner case (25) and be irradiated onto the user's scalp.

[0109] According to an embodiment, a plurality of light guide mechanism openings (252) corresponding to the positions of a plurality of light guide mechanisms (23) may be formed in the inner case (25). Laser light emitted from the light guide member (23) may be irradiated to the user's scalp through the plurality of light guide mechanism openings (252).

[0110] In addition, in order to improve the sensing accuracy of the temperature / humidity sensor (266) and the image sensor (262), a temperature / humidity sensor opening (254) corresponding to the temperature / humidity sensor (266) and an image sensor opening (256) corresponding to the image sensor (262) may be further formed in the inner case (25).

[0111] Hereinafter, features related to the arrangement of light sources in the care body will be described in more detail with reference to FIGS. 6 and 7.

[0112] Fig. 6 is a bottom view of the care body of the light output device illustrated in Fig. 1. Fig. 7 is a drawing for explaining the care body of the present invention having an arrangement of light sources based on hair loss type.

[0113] Referring to FIGS. 6 and 7, hair loss in a person (700) may primarily occur in the frontal region (711), frontotemporal region (712, 713), parietal region (720), and / or crown region (730).

[0114] Accordingly, according to an embodiment of the present invention, a plurality of light guide mechanisms (231) emitting laser light and second laser light sources (245) are arranged to correspond to the frontal region (711), frontal region (712, 713), parietal region (720), and crown region (730), thereby providing a more intensive care function for the above areas.

[0115] On the other hand, since hair loss is generally relatively less likely to occur in the temporal region, the light guide mechanism (231) and the second laser light source (245) may not be positioned at a location corresponding to the temporal region, thereby providing an efficient care function, but is not limited thereto.

[0116] As described above in Fig. 5, each of the plurality of light guide mechanisms (231) is exposed to the bottom surface of the care body (2) through the opening (243) or gap region (244) of the substrate (241), so as to irradiate laser light onto the user's scalp. In addition, a light guide mechanism opening (252) corresponding to the plurality of light guide mechanisms (231) is formed in the inner case (25), so as to prevent the intensity of the laser light emitted from the light guide mechanisms (231) from decreasing when it passes through the inner case (25).

[0117] In particular, the light guide mechanism (231) is implemented to distribute the laser light emitted from the first laser light source (1000) and irradiate it to a plurality of areas, and the intervals between the plurality of areas are smaller than the intervals between the second laser light sources (245). Accordingly, the light guide mechanism (231) can irradiate the laser light more densely to a specific area, thereby maximizing the care effect. In addition, the light guide mechanism (231) can maximize efficiency by irradiating the laser light to a wide area with one first laser light source (1000). The light guide mechanism (231) will be described in more detail later with reference to FIGS. 8 to 12.

[0118] Meanwhile, light emitted from the second laser light sources (245) and LEDs (246) can pass through the inner case (25) and be irradiated onto the user's scalp.

[0119] A plurality of LEDs (246) are evenly distributed and arranged in various areas of the substrate (241), so as to provide an overall care function for various areas of the user's head.

[0120] When categorizing the general types of hair loss, there are M-type hair loss in which hair loss progresses gradually from the frontal region (712, 713), V-type hair loss in which hair loss progresses gradually from the crown region (730), F-type hair loss in which hair loss progresses gradually from the parietal region (720), and U-type hair loss in which hair loss progresses in a complex manner from the frontal region (711), frontal region (712, 713), crown region (720), and crown region (730).

[0121] In other words, the areas that require intensive care may vary depending on the user's hair loss type.

[0122] Accordingly, the light output device (1) according to an embodiment of the present invention can divide the laser light sources (1000, 245) and LEDs (246) provided in the care body (2) into a plurality of zones (e.g., ZONE1, ZONE2, ZONE3).

[0123] The optical output device (1) can detect the user's hair loss type using at least one image sensor (262) and photodiodes (264), and control the laser light sources (1000, 245) and / or LEDs (246) included in at least one zone based on the detected hair loss type.

[0124] Although not shown, an image sensor (not shown) for detecting the hair loss condition of the user's frontal area may be further provided on the inner surface of the outer case (21). For example, the image sensor (not shown) may be positioned on the front side of the inner surface of the outer case (21) so as to face the user's frontal area when worn.

[0125] In this case, the optical output device (1) can detect the user's hair loss type by using an image sensor (262) arranged to capture images of the parietal region (720) and the occipital region (730), and an image sensor arranged on the inner side of the outer case (21) to capture images of the frontal region.

[0126] For example, if the detected hair loss type is M-type hair loss, the control unit (550; see FIG. 11) of the light output device (1) may turn on only the laser light sources corresponding to the first zone (ZONE1) and not turn on the laser light sources corresponding to the second zone (ZONE2) and the third zone (ZONE3). Similarly, the control unit (550) may turn on only the LEDs corresponding to the first zone (ZONE1) and not turn on the LEDs corresponding to the remaining zones. However, in some embodiments, in order to provide an overall care function for the entire scalp, the control unit (550) may turn on all LEDs regardless of the hair loss type.

[0127] Meanwhile, as the light sources (1000, 245, 246) emit light, they may emit heat along with the light. In this case, the performance of the light sources (1000, 245, 246) may gradually deteriorate due to the heat.

[0128] In addition, the heat may cause sweat to be generated from the user's scalp, and the light emitted from the light sources (1000, 245, 246) may be reflected by the sweat generated on the scalp, thereby reducing the care effect.

[0129] The control unit (550) can control the light sources (1000, 245, 246) to irradiate light onto the scalp, obtain temperature and humidity information through the temperature / humidity sensor (266), and control the light sources (1000, 245, 246) based on the obtained temperature and humidity information.

[0130] For example, if the acquired temperature or humidity is higher than the reference temperature or humidity, the control unit (550) can stop the light output of the light sources (1000, 245, 246). After stopping the light output for a predetermined period of time, the control unit (550) can resume the light output of the light sources (1000, 245, 246), or if the temperature or humidity acquired during the stoppage of the light output drops below the predetermined temperature or humidity, the control unit (550) can resume the light output. Accordingly, the light output device (1) can perform an efficient care operation based on the temperature and humidity.

[0131] Hereinafter, examples of thin film heat dissipation sheets will be described in more detail with reference to FIGS. 8 to 10.

[0132] FIG. 8 is a drawing for explaining the position of a thin film heat dissipation sheet (3) according to one embodiment of the present invention.

[0133] Referring to Fig. 8, a control unit or a main board (551) that functions as a control unit may be provided on the rear inner surface of the outer case (21). The main board (551) performs a key role of controlling the operation of the light source, sensor, and various components of the scalp care light output device (1) and processing data, and therefore, it is preferable to position it on the rear side in order to optimize the device's wiring length and maximize the use of internal space.

[0134] The above main board (551) can control multiple light sources and sensors of the scalp care light output device (1), process user input commands, and manage the operating status of the device. The control unit, which is the role of the main board, will be described later with reference to FIG. 11.

[0135] At this time, the main board may include a light source driving circuit, a sensor control circuit, and a power management circuit, etc., so there is a risk of overheating and user discomfort due to heat accumulation.

[0136] Meanwhile, a thin film heat dissipation sheet (3) can be placed at a location covering the main board (551), i.e., in the space between the main board (551) and the inner case (25). This is to prevent heat generated from the main board (551) from being transferred to the user's skin through the inner case (25).

[0137] In addition, by blocking or diffusing heat from a heating element to uniformize the temperature within a skin care device, it is possible to prevent deterioration of the function of components placed within the device.

[0138] At this time, the thin film heat dissipation sheet (3) is formed with an area equal to or larger than that of the main board (551), so as to effectively block heat generated from the main board (551). In addition, the thin film heat dissipation sheet (3) needs to be thin and flexible so that it can be placed in a narrow space of a scalp care device. It can have a configuration that efficiently manages heat while being configured with a thin thickness.

[0139] Hereinafter, the configuration of the thin film type heat dissipation sheet (3) will be described in detail with reference to FIGS. 9 and 10.

[0140] Fig. 9 is a cross-sectional schematic diagram of a thin film heat-dissipating sheet according to one embodiment of the present invention. Fig. 10 is a cross-sectional schematic diagram of a thin film heat-dissipating sheet according to another embodiment of the present invention.

[0141] A thin film heat dissipation sheet according to one embodiment of the present invention may include an insulating layer (32), a heat diffusion layer (31), and a coating layer (331, 332). The insulating layer (32) serves to block heat, and the heat diffusion layer (31) may serve to disperse heat vertically and horizontally. The coating layer (331, 332) may protect the insulating layer (32) and the heat diffusion layer (31), thereby reducing the generation of dust and increasing the durability of the heat dissipation sheet.

[0142] The thickness of the insulation layer (32) is preferably no more than about 0.5 mm. To provide high insulation performance while maintaining this thin thickness, the insulation layer may be formed of a layer of a flexible material including aerogel. Due to the nature of the material, an insulation sheet made of aerogel is flexible, allowing for easy design modification, thickness adjustment, and excellent insulation performance.

[0143] Table 1 shows the thermal conductivity of each material. Insulators are classified into inorganic, organic, and high-performance insulation, each with its own thermal conductivity and thickness.

[0144] Inorganic insulation materials include glass wool and rock wool, which are based on glass raw materials and silicate / calcium ore, respectively. These are relatively thick, measuring 160 and 170 mm, respectively, and exhibit average insulation performance, with thermal conductivities of 0.034 and 0.035 W / m·K, respectively.

[0145] Organic insulation materials include EPS (expanded polystyrene), XPS (extruded polystyrene), and polyurethane. EPS boasts relatively excellent insulation properties, with a thermal conductivity of 0.036 W / m·K at a thickness of 145 mm, and XPS at 0.027 W / m·K at a thickness of 150 mm. Polyurethane, with a thermal conductivity of 0.023 W / m·K even at a thickness of 110 mm, is considered the most efficient of all organic insulation materials.

[0146] High-performance insulation materials include aerogel sheets and vacuum insulation. Aerogel sheets are composed of a combination of nonwoven fabric and aerogel, and exhibit a thermal conductivity of 0.015 W / m K even at a thickness of just 0.5 mm. Vacuum insulation, based on a silica core, exhibits an extremely low thermal conductivity of 0.002 W / m K at thicknesses of 1.0 mm or more. However, their lack of structural flexibility may limit their application in confined spaces.

[0147] Classification Material Thickness Thermal Conductivity (mm) (W / m K) Inorganic Glass Cotton Glass Raw Material 1600.034 Rock Wool Silicate Calcium Ore 1700.035 Organic EPS 1) Polystyrene 1450.036XPS 2) Polystyrene 1500.027 Polyurethane Polyol + Isocyanate 1100.023 High-performance insulation Aerogel sheet Nonwoven fabric + Aerogel 0.50.015 Vacuum insulation Silica core > 1.00.002

[0148] Considering these characteristics, an insulation layer according to one embodiment of the present invention adopts an aerogel sheet. Aerogel sheets can simultaneously provide excellent heat-blocking performance and an ultra-thin structure. With a thermal conductivity of 0.015 W / m·K, they significantly surpass inorganic and organic insulation materials. With a thickness of only 0.5 mm, they can be effectively applied even in confined interior spaces. Furthermore, their flexible structure combined with nonwoven fabric makes them suitable for various device designs, including curved surfaces, and can contribute to device weight reduction.

[0149] More specifically, the insulation layer (32) may be formed of a composite material composed of glass fibers and silica gel particles. This structure can provide excellent insulation performance and structural stability by combining the physical and chemical properties of each.

[0150] Glass fibers possess high thermal resistance and mechanical strength, and their fine structure effectively blocks heat transfer within the insulation layer. Furthermore, the strength of the fibers can be increased by using a woven structure.

[0151] Silica gel particles are nanometer-sized and maximize heat-insulating effects through their high specific surface area. The diameter of the silica gel particles is preferably in the range of approximately 2 to 50 nm. This is the ideal size for maximizing insulation performance while maintaining a thin insulation layer.

[0152] The combination of glass fibers and silica gel particles is blended in an optimal ratio, typically about 7 to 3. Applying this ratio reduces flying dust compared to conventional methods.

[0153] In this way, the structural strength of glass fiber and the excellent insulating performance of silica gel can be maintained in balance.

[0154] Additionally, by manufacturing it with an appropriate thickness, tearing can be prevented.

[0155] This composite structure forms a microporous structure, contributing to lowering thermal conductivity and simultaneously achieving lightweight and flexible insulation layers.

[0156] Meanwhile, the heat diffusion layer (31) can serve to disperse heat vertically or horizontally. Referring to Fig. 9, the heat diffusion layer (31) can be placed on one side of the insulation layer (32), and the layer placed closer to the main board (551) can be either the heat diffusion layer (31) or the insulation layer (32). In other words, the type of layer directly facing the main board does not significantly affect the heat management effect of the heat dissipation sheet.

[0157] Although not illustrated in the drawings, according to another embodiment of the present invention, the thermal diffusion layer may be formed on both sides of the insulating layer. Forming the layer on both sides can further enhance the thermal diffusion effect. In such a case, each layer can be manufactured thinner so that the total thickness does not exceed 1 mm.

[0158] At this time, the thermal diffusion layer (31) can be formed using expanded graphite as a main component, and can be composed of expanded graphite alone or a combination including expanded graphite and additives such as metal particles and carbon nanotubes.

[0159] Expanded graphite, in particular, is a material that possesses both high thermal conductivity and low specific gravity. Due to its characteristics, expanded graphite rapidly transfers heat in the short (vertical) direction of the thickness, while evenly distributing heat in the long (horizontal) direction.

[0160] These dual heat transfer characteristics can effectively alleviate local heat concentrations (hot spots) that may occur inside the device and contribute to maintaining an even overall heat distribution.

[0161] Furthermore, it is desirable for the thermal diffusion layer to be approximately 0.4 mm thick or less. This is to optimize its functionality even in confined internal spaces, while simultaneously maintaining the device's weight reduction and structural stability. A thin thermal diffusion layer based on expanded graphite can fully demonstrate thermal management performance even in precise structures such as optical output devices.

[0162] Table 2 compares the temperature changes and the effects of applying insulation and thermal diffusion material between the motherboard and the internal case. The table includes the temperature and improvement of the inner surface of the motherboard's center area for cases with no insulation, with insulation (aerogel sheet) alone, and with the addition of thermal diffusion material (graphite sheet) to the insulation.

[0163] When no insulation was applied, the inner surface temperature of the central part of the motherboard was measured at the reference value of 51.6℃. However, when insulation (aerogel sheet) was applied, the inner surface temperature decreased by 3.2℃ to 48.4℃, demonstrating the excellent insulation performance of aerogel. Furthermore, when a thermal diffusion material (graphite sheet) was additionally applied along with the insulation, the temperature decreased to 44.0℃, showing an additional 4.4℃ and a total temperature improvement of 7.6℃ compared to the insulation alone.

[0164] In conclusion, applying insulation between the motherboard and the internal case can reduce the internal surface temperature by 3.2℃, and adding heat spreader can improve the temperature by up to 7.6℃.

[0165] Control groupNo insulation appliedInsulationInsulation + heat diffusion materialMaterial-Aerogel sheetAerogel sheet + Graphite sheetThickness-0.45mm0.7mmInner surface of the center of the motherboard51.648.444Compared with the control group0-3.2-7.6

[0166] This demonstrates that the combination of aerogel and expanded graphite can be highly effective in thermal management. An aerogel- and expanded graphite-based composite material according to one embodiment of the present invention can simultaneously satisfy both thermal insulation and heat diffusion performance, thereby enhancing the stability and efficiency of the device. These results support the technological potential of the present invention and can contribute to meeting various thermal management requirements, such as those for skin care devices and displays.

[0167] Referring to Fig. 10, the thin film heat dissipation sheet (3) may further include a coating layer (331, 332) attached to the other surface of the insulating layer (32) or one surface of the thermal diffusion layer (31). The coating layer may be formed on one or both surfaces of the composite layer including the insulating layer and the thermal diffusion layer.

[0168] In addition, although not shown in the drawing, it may also be formed on the side surfaces of the insulation layer and the heat diffusion layer, so as to completely enclose the composite layer. In such a case, by completely coating all surfaces, it is possible to prevent fine dust that may be generated from the insulation layer and the heat diffusion layer from flying away. In addition, the coating layers (331, 332) can protect each layer of the heat dissipation sheet from the outside and serve to improve durability.

[0169] The coating layer is based on a PET (polyethylene terephthalate) film, and an adhesive layer of acrylic, silicone, urethane, or other similar material can be attached to the film. In addition, by using a PI film, flame retardancy is ensured, enabling heat reduction.

[0170] The thickness of the adhesive layer is preferably in the range of 0.05 mm to 0.15 mm, and the thickness of the PET film may be in the range of 0.2 mm to 0.5 mm. The adhesive layer helps the coating layer to be stably fixed, and the thickness of the coating layer itself is preferably set to be between about 0.05 mm and 0.15 mm.

[0171] At this time, the coating layer can be produced by laminating the entire sheet surface using a flame-retardant film after producing the aerogel sheet.

[0172] Fig. 11 is a block diagram showing a control configuration of a light output device for scalp care according to an embodiment of the present invention.

[0173] In Fig. 11, for convenience of explanation, it is assumed that the control configurations of the optical output device (1) are distributed and provided in the care main body (2) and the user operation device (5), but according to an embodiment, the control configurations may be provided entirely within the care main body (2).

[0174] In one embodiment of the present invention, when all control configurations are provided within the care body, as described above, the control configuration may become a heat source, and a heat dissipation sheet may be required to alleviate heat emitted from the heat source.

[0175] At this time, the heat dissipation sheet is located in a very narrow space, so it must be structured to be very thin while being able to block heat efficiently.

[0176] Referring again to FIG. 11, the care body (2) of the light output device (1) may include a plurality of first laser light sources (1000), a plurality of second laser light sources (245), a plurality of LEDs (246), at least one image sensor (262), a temperature / humidity sensor (266), and a control unit (270).

[0177] The plurality of first laser light sources (1000) and second laser light sources (245) may be implemented as laser diodes that emit laser light. As described above, the light quantity (output) of the first laser light source (1000) may be greater than the light quantity of the second laser light source (245). In addition, the number of the first laser light sources (1000) may be less than the number of the second laser light sources (245).

[0178] A plurality of first laser light sources (1000) may be provided corresponding to a plurality of light guide mechanisms (800) as described above with reference to FIGS. 8 to 12. The plurality of first laser light sources (1000) may not be positioned to directly face the scalp when worn.

[0179] A plurality of second laser light sources (245) can be mounted spaced apart from each other in the care light source mounting portion (24) as shown in FIGS. 5 to 7.

[0180] Meanwhile, the first laser light sources (1000) and the second laser light sources (245) can be arranged to correspond to areas including the user's frontal region (711), frontal region (712, 713), parietal region (720), and crown region (730), as described above in FIG. 7.

[0181] A plurality of LEDs (246) are arranged in various areas of the substrate (241) to irradiate light to various areas of the user's scalp.

[0182] Meanwhile, each of the first laser light sources (1000), the second laser light sources (245), and the plurality of LEDs (246) can emit red light with a wavelength of about 630 nm to 670 nm. Red light can promote hair growth by stimulating the activity of hair follicles.

[0183] At least one image sensor (262) can acquire an image including the user's head area. The control unit (550) can detect the user's hair loss condition, hair loss type, etc. based on the acquired image. According to an embodiment, each of the second laser light sources (245) may be equipped with a photodiode (264). In this case, the control unit (550) can detect the hair loss condition, hair loss type, etc. using the at least one image sensor (262) and the photodiode (264).

[0184] The temperature / humidity sensor (266) can detect the temperature and humidity of the area adjacent to the user's scalp during operation of the light output device (1). The control unit (550) can control the light output of the light sources (1000, 245, 246) based on the detected temperature and humidity.

[0185] The control unit (270) provided in the care body (2) may include a care light source driver (272) that controls the on / off of light sources (1000, 245, 246) and a sensor controller (274) that controls the operation of sensors (262, 264, 266).

[0186] When the care light source driver (272) receives a control signal for each of the light sources (1000, 245, 246) from the processor (552) of the control unit (550), the care light source driver (272) can control the light output of each of the light sources (1000, 245, 246) based on the received control signal.

[0187] The sensor controller (274) may also control the operation of the sensors (262, 264, 266) based on the received control signals when the control signals for the sensors (262, 264, 266) are received from the processor (552). The sensor controller (274) may transmit sensing data received from each of the sensors (262, 264, 266) to the processor (552).

[0188] Depending on the embodiment, the care light source driver (272) and sensor controller (274) may be implemented within the control unit (550) or may be implemented integrally with the processor (552).

[0189] Meanwhile, the user operation device (5) of the optical output device (1) may include a communication unit (510), an input unit (520), an output unit (530), a memory (540), a control unit (550), and a power supply unit (560).

[0190] The communication unit (510) may include at least one communication module for connecting the optical output device (1) to a user's mobile terminal (smartphone, tablet PC, etc.) or a server, etc. For example, the at least one communication module may support a short-range wireless communication method such as Bluetooth, or a wireless Internet method such as Wi-Fi.

[0191] For example, the control unit (550) can transmit operation or status information of the optical output device (1) to the user's mobile terminal via the communication unit (510). In addition, the control unit (350) can also transmit the user's scalp condition information, hair loss condition information, and / or hair loss type information to the user's mobile terminal via the communication unit (510). The scalp condition information, hair loss condition information, and hair loss type information may be information acquired based on sensing data of the image sensor (262) and / or a plurality of photodiodes (264).

[0192] The input unit (520) can receive inputs related to turning the power of the optical output device (1) on / off, setting the operation mode, etc. from the user. For example, the input unit (520) can include at least one button.

[0193] The output unit (530) can output information such as the power status, operation mode, and battery status of the light output device (1). For example, the output unit (530) can include at least one light source (532) and a speaker (534) that outputs the information in the form of sound.

[0194] The memory (540) may include control data for controlling the components included in the light output device (1) or data related to the light output settings of the light sources (1000, 245, 246) according to each of the plurality of operation modes.

[0195] Additionally, the memory (540) may include data or an algorithm for generating scalp condition information, hair loss condition information, and / or hair loss type information from sensing values ​​provided from an image sensor (262) and / or a plurality of photodiodes (264).

[0196] Additionally, the memory (540) may include data or algorithms for controlling the light output of the light sources (1000, 245, 246) based on temperature and humidity information provided from the temperature / humidity sensor (266).

[0197] The above memory (540) can be understood as a concept encompassing at least one volatile memory (RAM, etc.) and at least one non-volatile memory (ROM, Flash memory, etc.).

[0198] The control unit (550) can control the overall operation of the optical output device (1). This control unit (550) can include at least one processor (or controller). In addition, in terms of hardware, the control unit (550) can include at least one CPU, an application processor (AP), a microcomputer, an IC, an application specific integrated circuit (ASIC), etc.

[0199] For example, the control unit (550) may include a processor (main processor; 552), an image signal processor (ISP; 554), an amplifier IC (556), a charging IC (558), etc.

[0200] The processor (552) may correspond to a main processor that controls the overall operation of the light output device (1). For example, the processor (552) may set the operation mode of the light output device (1) based on an input received through the input unit (520) and control the components included in the light output device (1) according to the set operation mode. In addition, the processor (552) may control the operation of other components (554, 556, 558) included in the control unit (550), and even the operation of the care light source driver (272) and the sensor controller (274) of the care main body (2).

[0201] Meanwhile, the processor (552) can detect the user's hair loss condition or hair loss type based on the sensing values ​​obtained from the image sensor (262) and / or the plurality of photodiodes (264). Based on the detected hair loss condition or hair loss type, the processor (552) can control the light output of the light sources (1000, 245, 246) corresponding to at least one zone among the plurality of zones (ZONE1 to ZONE3; see FIG. 7).

[0202] The ISP (554) can process the sensing values ​​acquired from the image sensor (262) to generate an image. The generated image may include the user's scalp. The processor (552) can transmit the generated image to the user's terminal or the like via the communication unit (510).

[0203] The amplifier IC (556) can control the sound output of the speaker (534) included in the output unit (530), and the charging IC (558) can control the charging or power supply of the battery (562) of the power supply unit (560).

[0204] The power supply unit (560) can provide power required for the operation of the optical output device (1) to each of the components. For example, the power supply unit (560) can include a battery (562). The power supply unit (560) includes a terminal for connection to an external power supply source, and can charge the battery (562) with power supplied from the outside through the terminal. The power supply unit (560) can supply power to the components included in the care body (2) through a cable (52).

[0205] As described above, the present invention provides a configuration that effectively improves thermal management performance through the combination of an insulating material and a heat-diffusing material. The aerogel-based insulating layer exhibits excellent heat-blocking properties, while the expanded graphite-based heat-diffusing layer disperses heat concentration, helping to maintain a uniform temperature within the device. This prevents excessive temperature rise due to the device's heat, protecting the user's skin and providing a safe environment even during extended use.

[0206] Furthermore, thermal management can contribute to enhancing device durability by minimizing damage related to overheating of internal components. The composite material of the present invention, which can sufficiently demonstrate insulation and heat diffusion performance even in confined spaces, can be suitably used in various environments requiring thermal management and can play a key role in enhancing the performance and user experience of devices such as scalp care light output devices.

[0207] It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

[0208] The above detailed description should not be construed as limiting in any respect and should be considered illustrative only. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. In a light output device for scalp care, A dome-shaped outer case forming the exterior; An inner case formed inside the outer case; A plurality of light sources arranged in the space between the outer case and the inner case; A control unit disposed in the space between the outer case and the inner case; and Including a thin film type heat dissipation sheet positioned adjacent to the above control unit, The above thin film heat dissipation sheet An insulating layer of a flexible material containing aerogel; and characterized by including a thermal diffusion layer formed on one surface of the insulating layer; A light output device for scalp care comprising a thin-film heat-dissipating sheet 2. In paragraph 1, The above control unit It is placed on the rear side of the space between the outer case and the inner case, The above thin film heat dissipation sheet characterized in that it is placed in the space between the control unit and the inner case. A light output device for scalp care comprising a thin film heat dissipation sheet.

3. In paragraph 1, The above thin film heat dissipation sheet It is characterized in that it further includes a coating layer attached to the other surface of the insulating layer or one surface of the thermal diffusion layer. A light output device for scalp care comprising a thin film heat dissipation sheet.

4. In paragraph 3, The above coating layer It is characterized in that it is formed on the other side of the insulating layer, one side of the thermal diffusion layer, the side of the insulating layer and the side of the thermal diffusion layer, and surrounds the insulating layer and the thermal diffusion layer. A light output device for scalp care comprising a thin film heat dissipation sheet.

5. In paragraph 1, The above thermal diffusion layer Characterized in that it is formed on both sides of the insulating layer A light output device for scalp care comprising a thin-film heat-dissipating sheet 6. In paragraph 1, The above insulation layer characterized by comprising glass fibers and silica gel particles having a diameter of 2 to 50 nm. A light output device for scalp care comprising a thin-film heat-dissipating sheet 7. In paragraph 6, The ratio of the glass fibers and silica gel particles is substantially 7 to 3. A light output device for scalp care comprising a thin film heat dissipation sheet.

8. In paragraph 1, The above thermal diffusion layer Characterized by being formed from expanded graphite A light output device for scalp care comprising a thin-film heat-dissipating sheet 9. In paragraph 1, The thickness of the above insulation layer is characterized by being 0.5 mm or less. A light output device for scalp care comprising a thin film heat dissipation sheet.

10. In paragraph 1, The thickness of the above thermal diffusion layer is characterized by being 0.4 mm or less. A light output device for scalp care comprising a thin film heat dissipation sheet.

11. In paragraph 1, The above thin film heat dissipation sheet Characterized by a total cross-sectional thickness of 1 mm or less A light output device for scalp care comprising a thin film heat dissipation sheet.

Images