Film structures, screens, light therapy devices, and wearable devices

Abstract

The application provides a film structure, a screen body, a light therapy device and a wearable device. The film structure is suitable for a light therapy device and a wristband device, and is arranged on the side of the light therapy device and the wristband device in contact with the skin tissue. The film structure comprises a hydrophobic layer, a flow guide layer and a hydrophilic layer arranged in order from weak to strong in terms of hydrophilicity. The hydrophilic layer is arranged close to the side of the light therapy device and the wristband device. The hydrophobic layer, the flow guide layer and the hydrophilic layer are made of a light-transmitting material or a light-transmitting composite material. The application can enable sweat to spontaneously move from the hydrophobic layer to the hydrophilic layer side, guide the sweat from the layer close to the skin to the layer far from the skin, and achieve the effects of moisture absorption, sweat removal and air permeation. In addition, the layers of the film structure are made of a light-transmitting material or a light-transmitting composite material, which can avoid affecting the treatment and detection effects of the light therapy device and the portable wearable device.

Description

Technical Field

[0001] This invention relates to the field of electronic equipment technology, and in particular to a membrane structure, a screen with heat dissipation function, a phototherapy device, and a wearable device. Background Technology

[0002] Currently, with the development of technology and increased public awareness of health, many phototherapy devices and portable wearable devices that facilitate real-time monitoring of heart rate or blood oxygen levels have appeared on the market. However, when in close contact with the skin, poor breathability often leads to sweating, affecting comfort. Furthermore, prolonged use of phototherapy devices can cause inflammation or bacterial growth in the treatment area. Excessive sweat can also corrode internal components of phototherapy and wearable devices, potentially causing them to malfunction. Therefore, the breathability of phototherapy devices and portable wearable devices needs improvement during use. Summary of the Invention

[0003] This invention provides a membrane structure, a heat dissipation screen, a phototherapy device, and a wearable device to address the issue of insufficient breathability during the use of phototherapy devices and portable wearable devices.

[0004] In a first aspect, embodiments of the present invention provide a membrane structure suitable for phototherapy devices and wristband devices, disposed on the side of the phototherapy device and wristband device in contact with skin tissue; the membrane structure includes:

[0005] The hydrophobic layer, the diffusing layer, and the hydrophilic layer are arranged in order of increasing hydrophilicity;

[0006] The hydrophilic layer is disposed near the phototherapy device and the wristband device; the hydrophobic layer, the flow-guiding layer and the hydrophilic layer are made of light-transmitting material or light-transmitting composite material.

[0007] In one possible implementation, the pore diameters of the hydrophobic layer, the flow-guiding layer, and the hydrophilic layer decrease sequentially; the pore diameter of the hydrophobic layer is 5–100 μm; the pore diameter of the flow-guiding layer is 0.1–5 μm; the pore diameter of the hydrophilic layer is 10–100 nm; and the pore density is 10–100 pores per square centimeter.

[0008] In one possible implementation, the hydrophobic layer is made of an olefin or polyamide material; the flow-guiding layer is made of a polyurethane material; and the hydrophilic layer is made of a cellulose material. In another possible implementation, the light-transmitting material includes one or more of the following: biomimetic gold, urethane compounds, aldehyde compounds, olefin compounds, carboxymethyl cellulose, aromatic hydrocarbon compounds, epoxy compounds, silicon dioxide, silicon oxynitride, titanium dioxide, and silver nanowires.

[0009] In one possible implementation, the light-transmitting composite material includes one or more of the following: silver nanowires, silver nanowires and graphene composites, silver nanowires and organosilicon composites, and silver nanowires and silk fibroin composites.

[0010] This invention provides a membrane structure that employs a three-layer pore gradient structure design, positioned on the skin-tissue contact side of a phototherapy device or wristband device. The membrane structure comprises a hydrophobic layer, a channeling layer, and a hydrophilic layer arranged in order of hydrophilicity. This allows sweat to spontaneously pass through the hydrophobic layer towards the hydrophilic layer, guiding sweat from the layer closest to the skin to the layer furthest away, achieving moisture absorption, perspiration wicking, and breathability. Furthermore, each layer is made of a light-transmitting material or composite material, avoiding interference with the treatment and detection effects of the phototherapy device and the portable wearable device.

[0011] Secondly, embodiments of the present invention provide a screen, comprising: a light-emitting device and any of the aforementioned film structures;

[0012] The membrane structure is disposed on the light-emitting side of the light-emitting device; the hydrophilic layer is disposed close to the light-emitting side of the light-emitting device; and the hydrophobic layer is disposed away from the light-emitting side of the light-emitting device.

[0013] In one possible implementation, a breathable barrier layer is further included between the hydrophilic layer and the light-emitting device.

[0014] In one possible implementation, a desiccant is disposed in the breathable barrier; the desiccant may be a transparent desiccant or an opaque desiccant.

[0015] In one possible implementation, desiccant is placed in all areas of the breathable barrier, or desiccant is placed in a portion of the breathable barrier and the distribution area is graphically designed.

[0016] In one possible implementation, the desiccant is filled with light-extracting particles.

[0017] In one possible implementation, the light-emitting device is an OLED, LED, quantum dot light-emitting device, mini LED, or microLED.

[0018] In one possible implementation, the light-emitting device is an OLED; the OLED includes an encapsulation layer, a cathode, an organic layer, an anode layer, and a substrate arranged sequentially.

[0019] The hydrophilic layer is disposed close to the substrate.

[0020] This invention provides a screen comprising a light-emitting device and a membrane structure designed with a three-layer pore gradient structure, the membrane structure being disposed on the light-emitting side of the light-emitting device. The membrane structure includes a hydrophobic layer, a conductive layer, and a hydrophilic layer arranged in order of hydrophilicity. The hydrophobic layer is disposed away from the light-emitting side of the light-emitting device, and the hydrophilic layer is disposed close to the light-emitting side of the light-emitting device. Sweat can spontaneously pass through the hydrophobic layer to the hydrophilic layer, guiding the sweat from the layer closer to the skin to the layer farther away from the skin. During the guiding process, the sweat is discharged through the pores of the hydrophobic layer, the conductive layer, and the hydrophilic layer, achieving the effects of moisture absorption, perspiration wicking, and breathability, and preventing excessive sweat accumulation from corroding the internal components of the phototherapy device and wearable device.

[0021] Thirdly, embodiments of the present invention provide a phototherapy device, characterized in that it includes any of the aforementioned membrane structures, or includes any of the aforementioned screens.

[0022] Fourthly, embodiments of the present invention provide a wearable device, characterized in that it includes any of the aforementioned membrane structures, or includes any of the aforementioned screens. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a membrane structure provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a screen according to an embodiment of the present invention;

[0026] Figure 3a This is a schematic diagram of the structure of a screen according to another embodiment of the present invention;

[0027] Figure 3b This is a schematic diagram of the structure of a screen according to another embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of a screen provided in another embodiment of the present invention. Detailed Implementation

[0029] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this solution, not all of them. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this solution.

[0030] The term "comprising" and any other variations thereof in the specification, claims, and accompanying drawings of this invention mean "including but not limited to," and are intended to cover a non-exclusive inclusion, not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order.

[0031] The implementation of the present invention will be described in detail below with reference to the accompanying drawings:

[0032] Figure 1 This is a schematic diagram of a membrane structure according to an embodiment of the present invention. This membrane structure is suitable for phototherapy devices and wristband devices, and is disposed on the side of the phototherapy device or wristband device that contacts the skin tissue. (Refer to...) Figure 1 The membrane structure 1 includes a hydrophobic layer 11, a flow-guiding layer 12, and a hydrophilic layer 13 arranged in order of increasing hydrophilicity, with the hydrophilicity increasing from weak to strong as indicated by the arrows in the figure.

[0033] The hydrophilic layer 13 is positioned close to the phototherapy device and the wristband device. The hydrophobic layer 11, the flow-guiding layer 12, and the hydrophilic layer 13 are made of light-transmitting material or light-transmitting composite material.

[0034] Specifically, the pore diameters of the hydrophobic layer 11, the flow-guiding layer 12, and the hydrophilic layer 13 are different, with the pore diameters decreasing sequentially from hydrophobic layer 11 to flow-guiding layer 12 to hydrophilic layer 13.

[0035] Optionally, one or more of the hydrophobic layer 11, the flow-guiding layer 12, and the hydrophilic layer 13 may be designed with a gradient, and the hydrophilicity of all layers may be distributed in an overall order from weak to strong.

[0036] In different embodiments, the hydrophilic layer 13 is configured differently.

[0037] In one possible implementation, the hydrophilic layer 13 is attached to the surface of the device near the side of the phototherapy device and the wristband device. As sweat flows from the hydrophobic layer 11 to the hydrophilic layer 13, it evaporates from the sides of each layer.

[0038] In one possible implementation, the hydrophilic layer 13 is disposed on the side surface of the phototherapy device and the wristband device via an auxiliary structural component. The auxiliary structural component between the hydrophilic layer 13 and the device prevents excessive sweat evaporation from failing to penetrate the device's interior in a timely manner.

[0039] In practical applications, phototherapy devices are portable handheld phototherapy instruments, or the handheld end of larger phototherapy instruments. During treatment, different wavelengths of light are irradiated through light-emitting devices to achieve the therapeutic effect. Wristband devices include those with heart rate or blood sample detection functions. During detection, light-emitting devices emit detection light and the heart rate or blood sample concentration is determined based on the reflected information. Wristband devices include various smart bracelets, which are typically worn for extended periods. During wear, the detection area is in prolonged contact with the skin, which can easily lead to sweating in that area.

[0040] As can be seen from the working principles of phototherapy devices and wristband devices, both achieve their functions by emitting light of different wavelengths through light-emitting devices. Therefore, membrane structure 1 requires both breathability and light transmission. The membrane structure 1 provided in this embodiment achieves both breathability and light transmission through a hydrophilic three-layer gradient structure design and light-transmitting properties. The different hydrophilicities of the three layers are mainly achieved by the different pore sizes of each layer.

[0041] In one possible implementation, the pore size of the hydrophobic layer 11 is 5–100 μm, preferably 5–50 μm; the pore size of the flow-guiding layer 12 is 0.1–5 μm, preferably 0.5–2 μm; and the pore size of the hydrophilic layer 13 is 10–100 nm, preferably 40–60 nm. The preferred range of membrane structure pore sizes not only provides better sweat wicking but also more significant light diffusion, thereby effectively removing sweat and improving device efficiency.

[0042] In one possible implementation, the pore density is 10 to 100 pores per square centimeter, preferably 40 to 80. Within this range, the pore density can be effectively set according to the density of human perspiration, achieving comprehensive and effective sweat removal.

[0043] In one possible implementation, the light-transmitting material includes one or more of the following: biomimetic gold, urethane compounds, aldehyde compounds, olefin compounds, carboxymethyl cellulose, aromatic hydrocarbon compounds, epoxy compounds, silicon dioxide, silicon oxynitride, titanium dioxide, and silver nanowires.

[0044] In one possible implementation, the light-transmitting composite material includes one or more of the following: silver nanowires, silver nanowire and graphene composites, silver nanowire and organosilicon composites, and silver nanowire and silk fibroin composites.

[0045] In different embodiments, the materials of the hydrophobic layer 11, the flow guiding layer 12, and the hydrophilic layer 13, as well as the combination of materials for each layer, are different. In order to avoid affecting the treatment and detection effects of the phototherapy device and the wristband device, the materials of the hydrophobic layer 11, the flow guiding layer 12, and the hydrophilic layer 13 are selected from the above-mentioned light-transmitting materials or light-transmitting composite materials.

[0046] In one specific embodiment, the hydrophobic layer 11 is made of olefin or polyamide, the flow guiding layer 12 is made of polyurethane, and the hydrophilic layer 13 is made of carboxymethyl cellulose.

[0047] Membrane structures made of different materials are more likely to meet the design requirements for different pore sizes and can achieve multifunctionality. For example, the hydrophobic layer 11 can preferably be made of olefin or polyamide materials, which have certain biocompatibility; the flow-guiding layer 12 can preferably be made of polyurethane materials, which have certain flexibility and can effectively ensure the toughness and reliability of the membrane structure; and the hydrophilic layer 12 can be made of cellulose materials, which are simpler to prepare.

[0048] In one possible implementation, the hydrophobic layer 11 is made of one or more of the following: silver nanowires, a composite material of silver nanowires and graphene, a composite material of silver nanowires and organosilicon, or a composite material of silver nanowires and silk fibroin. As the structure in membrane structure 1 that contacts skin tissue, the hydrophobic layer 11, made of silver nanowires or materials including silver nanowires, ensures high permeability and functions as a sensor for sweating. In phototherapy devices, the hydrophobic layer 11 can be used to monitor indicators such as skin inflammation and treatment progress, and to provide feedback on the treatment effect to the control system of the phototherapy device.

[0049] This invention provides a membrane structure 1, which is designed with a three-layer pore gradient structure and positioned on the side of the contact surface between the phototherapy device and the skin tissue of a wristband device. The membrane structure 1 includes a hydrophobic layer 11, a channeling layer 12, and a hydrophilic layer 13 arranged in order of hydrophilicity. This allows sweat to spontaneously pass through the hydrophobic layer 11 towards the hydrophilic layer 13, guiding sweat from the layer closest to the skin to the layer furthest away, achieving the effects of moisture absorption, perspiration wicking, and breathability. Furthermore, each layer is made of a light-transmitting material or a light-transmitting composite material, which avoids affecting the treatment and detection effects of the phototherapy device and the portable wearable device.

[0050] Figure 2 This is a schematic diagram of the structure of a screen according to an embodiment of the present invention, as shown below. Figure 2 As shown, the screen includes a membrane structure 1 and a light-emitting device 2. The membrane structure 1 is as shown in any of the preceding embodiments.

[0051] In this configuration, membrane structure 1 is disposed on the light-emitting side of the light-emitting device 2. The hydrophilic layer 13 is disposed close to the light-emitting side of the light-emitting device 2 (the arrow indicates the light-emitting direction). The hydrophobic layer 11 is disposed away from the light-emitting side of the light-emitting device 2.

[0052] Optionally, the light-emitting device 2 is either in contact with or spaced from the membrane structure 1.

[0053] In one possible implementation, a breathable barrier layer 3 is also included between the hydrophilic layer 13 and the light-emitting device 2. For example... Figure 2 The light-emitting device 2 and the membrane structure 1 are arranged at an interval. Sweat is introduced into the breathable barrier layer 3 through the hydrophilic layer 13 and discharged into the air through the breathable barrier layer 3, thus preventing sweat from seeping into the interior of the light-emitting device 2.

[0054] In one possible implementation, such as Figure 3a As shown, a desiccant 4 is disposed in the breathable barrier layer 3. The desiccant 4 can adsorb sweat expelled through the hydrophilic layer 13, thereby improving the dehumidification and perspiration wicking efficiency of the membrane structure 1. Optionally, the desiccant 4 can be a transparent desiccant 4 or an opaque desiccant 4.

[0055] In different embodiments, the desiccant 4 is placed in different areas in the breathable barrier 3.

[0056] In one possible implementation, desiccant 4 is placed in all areas of the breathable interlayer 3 to improve the absorption capacity of sweat.

[0057] In one possible implementation, a desiccant 4 is placed in a portion of the breathable interlayer 3 and the distribution area is graphic-designed to balance the sweat absorption capacity and the light transmittance of the light-emitting device 2.

[0058] Optional, such as Figure 3b As shown, the desiccant 4 is distributed in the edge area of ​​the breathable barrier layer 3 to ensure the light transmittance of the middle area of ​​the breathable barrier layer 3, improve the light reception of the skin treatment or monitoring area, and at the same time improve breathability and allow sweat to evaporate quickly into the surrounding air. The desiccant 4 is evenly distributed or intermittently distributed in the edge area of ​​the breathable barrier layer 3.

[0059] Optionally, the distribution area of ​​the desiccant 4 can be determined based on the luminous area of ​​the light-emitting device 2. The larger the luminous area of ​​the light-emitting device 2, the more heat is generated, and thus the larger the distribution area of ​​the desiccant 4.

[0060] To illustrate with a specific embodiment, when the light-emitting area of ​​the light-emitting device 2 attached to the skin surface is 45mm*45mm, and the light-emitting time of the light-emitting device 2 is 6 hours, then... Figure 2 In the design shown, the breathable barrier 3 has no desiccant 4. The membrane structure 1 absorbs approximately 15ml of sweat, and sweat residue will remain on the surface of the hydrophilic layer 13. Figure 3aThe breathable barrier 3 shown contains a desiccant 4. The membrane structure 1 absorbs approximately 30 ml of sweat, and the surface of the hydrophilic layer 13 is free of sweat. The larger the luminescent area of ​​the light-emitting device 2, the larger the corresponding area of ​​the membrane structure 1 will be. Therefore, under the same luminescence time conditions, the sweat absorption of the membrane structure 1 will be greater.

[0061] In one possible implementation, the desiccant 4 is filled with light-extracting particles, which can improve both sweat absorption capacity and photoluminescence efficiency. When the screen is used in a phototherapy device, it can improve the treatment efficiency of the phototherapy device.

[0062] In one possible implementation, the diameter of the light-extracted particles is determined based on the wavelength of the light emitted by the light-emitting device 2. Optionally, a longer wavelength results in a larger diameter of the light-extracted particles. The difference between the wavelength and the diameter of the light-extracted particles is less than a set value, which is 50 nm to 100 nm.

[0063] To illustrate with a specific embodiment, when the luminance of the light-emitting device 2 is 2000 nits, Figure 2 The scheme shown, where the breathable barrier 3 has no desiccant 4, has a luminous efficiency of 26 cd / A; Figure 3a The breathable barrier 3 shown contains a desiccant 4, and its luminous efficiency is 20 cd / A, compared to... Figure 2 The desiccant-free scheme 4 shown exhibits reduced luminous efficiency; both transparent and opaque desiccants contribute to the reduced luminous efficiency of the light-emitting device. Figure 3a Based on the scheme shown, particles were extracted by adding light to desiccant 4, with a photometric efficiency of 39 cd / A. This is compared to... Figure 2 The light efficiency of scheme 4 without desiccant is improved.

[0064] In one possible implementation, the light emitted by the light-emitting device 2 has a wavelength of 390nm to 780nm. The wavelength of the light is 390nm to 780nm, which mainly corresponds to the visible light wavelengths such as red light, green light, and yellow light used in the therapeutic device.

[0065] Based on any of the foregoing embodiments, the light-emitting device 2 can be an OLED, LED, quantum dot light-emitting device, miniLED, or microLED. The specific composition of the light-emitting device 2 varies depending on the light source, and will not be described in detail in this embodiment. Only the positional relationship between the light-emitting device 2 and the film structure 1 will be explained using the example of an OLED as the light-emitting device 2.

[0066] Figure 4 This is a schematic diagram of the structure of a screen provided in an embodiment of the present invention. The light-emitting device 2 is an OLED. Figure 4 The main illustration shows an OLED comprising an encapsulation layer 21, a cathode 22, an organic layer 23, an anode layer 24, and a substrate 25 arranged sequentially. The hydrophilic layer 13 is disposed close to the substrate 25.

[0067] In specific applications, such as Figure 4 The air-permeable partition 3 shown can be equipped with a desiccant 4, and the desiccant 4 is disposed in part or all of the air-permeable partition 3.

[0068] This invention provides a screen comprising a light-emitting device 2 and a membrane structure 1 designed with a three-layer pore gradient structure, the membrane structure 1 being disposed on the light-emitting side of the light-emitting device 2. The membrane structure 1 includes a hydrophobic layer 11, a flow-guiding layer 12, and a hydrophilic layer 13 arranged in order of hydrophilicity. The hydrophobic layer 11 is disposed away from the light-emitting side of the light-emitting device 2, and the hydrophilic layer 13 is disposed close to the light-emitting side of the light-emitting device 2. Sweat can spontaneously pass through the hydrophobic layer 11 towards the hydrophilic layer 13, guiding sweat from the layer closest to the skin to the layer furthest away from the skin. During this guiding process, sweat is expelled through the pores of the hydrophobic layer 11, the flow-guiding layer 12, and the hydrophilic layer 13, achieving the effects of moisture absorption, perspiration wicking, and breathability, and preventing excessive sweat accumulation from corroding the internal components of the phototherapy device and wearable device.

[0069] This invention also provides a phototherapy device, including the membrane structure 1 provided in any of the foregoing embodiments, or including the screen provided in any of the foregoing embodiments.

[0070] This invention also provides a wearable device, including the membrane structure 1 provided in any of the foregoing embodiments, or including the screen provided in any of the foregoing embodiments.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A membrane structure, characterized in that, Suitable for phototherapy devices and wristband devices, disposed on the side of the phototherapy device or wristband device that contacts the skin tissue; the membrane structure includes: The hydrophobic layer, the diffusing layer, and the hydrophilic layer are arranged in order of increasing hydrophilicity; The hydrophilic layer is disposed near the phototherapy device and the wristband device; the hydrophobic layer, the flow-guiding layer, and the hydrophilic layer are made of light-transmitting materials or light-transmitting composite materials; the hydrophobic layer is made of light-transmitting composite materials; the light-transmitting composite materials include one or more of the following: silver nanowires, silver nanowires and graphene composite materials, silver nanowires and organosilicon composite materials, and silver nanowires and silk fibroin composite materials; the hydrophilic layer is disposed on the side surface of the phototherapy device and the wristband device through auxiliary structural components; the pore diameters of the hydrophobic layer, the flow-guiding layer, and the hydrophilic layer decrease sequentially.

2. The membrane structure according to claim 1, characterized in that, The light-transmitting material includes one or more of the following: biomimetic gold, urethane compounds, aldehyde compounds, olefin compounds, carboxymethyl cellulose, aromatic hydrocarbon compounds, epoxy compounds, silicon dioxide, silicon oxynitride, titanium dioxide, and silver nanowires.

3. The membrane structure according to claim 1, characterized in that, The pore size of the hydrophobic layer is 5~100µm; the pore size of the flow-guiding layer is 0.1~5µm; and the pore size of the hydrophilic layer is 10~100nm.

4. The membrane structure according to any one of claims 1 to 3, characterized in that, The hydrophobic layer is made of olefin or polyamide material; the flow-guiding layer is made of polyurethane material; and the hydrophilic layer is made of cellulose material.

5. A screen body, characterized in that, include: The light-emitting device and the film structure according to any one of claims 1 to 4; The membrane structure is disposed on the light-emitting side of the light-emitting device; the hydrophilic layer is disposed close to the light-emitting side of the light-emitting device; the hydrophobic layer is disposed away from the light-emitting side of the light-emitting device; a breathable barrier layer is further included between the hydrophilic layer and the light-emitting device; a desiccant is disposed in the breathable barrier layer; the desiccant is a transparent desiccant or an opaque desiccant. The breathable barrier layer contains desiccant in all areas, or desiccant is placed in a portion of the breathable barrier layer with a graphic design for the distribution area; the desiccant distribution area is located at the edge of the breathable barrier layer; the desiccant is filled with light extraction particles.

6. The screen according to claim 5, characterized in that, The light-emitting device is an OLED; the OLED includes an encapsulation layer, a cathode, an organic layer, an anode layer, and a substrate arranged sequentially. The hydrophilic layer is disposed close to the substrate.

7. A phototherapy device, characterized in that, It includes the membrane structure according to any one of claims 1 to 4, or the screen body according to claim 5 or 6.

8. A wearable device, characterized in that, It includes the membrane structure according to any one of claims 1 to 4, or the screen body according to claim 5 or 6.

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