Multifunctional phototherapy mask

Abstract

The multifunctional phototherapy mask comprises a first shell, a second shell, a first flexible OLED light source, a driving device and a fixing device, wherein the first shell at least covers part of a face cheek area; the second shell at least covers part of the mouth and / or nose area of the human face; the flexible OLED light source comprises at least one OLED device; the first flexible OLED light source is provided with at least one light-emitting surface, and the light-emitting surface faces one side of a human face and can at least cover part of the cheek of the human face; the first flexible OLED light source is arranged on the first shell, and the first flexible OLED light source emits light with the peak wavelength ranging from 600 nm to 1000 nm. The flexible OLED light source is electrically connected with the driving device; and the fixing device is arranged on the first shell and / or the second shell. The multifunctional phototherapy mask not only has the effects of dust prevention, filtration and phototherapy on the face, but also can illuminate externally or display colors and patterns to be matched with occasions or moods, thereby achieving multiple purposes.

Description

Technical Field

[0001] The present invention relates to a phototherapy mask. More specifically, it relates to a multifunctional phototherapy mask using a flexible OLED light-emitting panel as a light source. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for health. However, air pollution problems such as smog have not received sufficient attention, which may cause other serious diseases such as cancer. More importantly, microorganisms such as bacteria and viruses attach to air pollution particles, travel and spread in the air, and may cause various diseases.

[0003] Current masks are mostly made by laminating one or more non-woven fabrics. Commonly used medical masks further include three layers: inner, middle, and outer. The inner layer is a skin-friendly material (ordinary hygienic gauze or non-woven fabric), the middle layer is an isolation and filtration layer (ultrafine polypropylene fiber meltblown material layer), and the outer layer is a special material antibacterial layer (non-woven fabric or ultra-thin polypropylene meltblown material layer). Such masks generally work on the principle of filtration, that is, using a fiber structure material with smaller pores as the filtration layer material, so that dust, bacteria, or virus and other microbial particles cannot pass through the mask filtration layer or are adsorbed in the adsorption particles of the filtration layer, thereby achieving the purpose of blocking and preventing users from inhaling and causing infection or disease. The common masks we see are mainly medical surgical masks and N95 masks. The N95 mask is an epidemic prevention mask designated by the United States to prevent tuberculosis bacteria and can effectively filter particles larger than 0.3 microns, such as tuberculosis viruses. For filtering masks, the most important area to be protected is the mouth and nose area, because this is the easiest way for germs to invade the human body. Nevertheless, existing masks generally cover most of the face below the eye sockets, and the same material is used in the areas outside the mouth and nose. In fact, it is unnecessary to use a filtration layer on the face. Moreover, the air permeability of such masks is poor, and the facial skin is more likely to nourish bacteria, clog pores, and cause skin discomfort or even allergic diseases after being in this warm and humid environment for a long time.

[0004] In recent years, a number of studies have shown that red to near-infrared light with a peak wavelength in the range of 600 - 1000 nm helps to promote the regeneration of tissues such as collagen and skin cells, and can be applied in the fields of anti-wrinkle beauty, wound healing promotion, freckle and scar removal (Chan Hee Nam et al., Dermatologic Surgery, 2017, 43: 371 - 380; Daniel Barolet, Semin Cutan Med Surg, 2008, 27: 227 - 238; Yongmin Jeon, Adv. Mater. Technol. 2018, 1700391). OLED is a surface light source and a cold light source, which is not dazzling and has the characteristics of being thin and light, and is very easy to be integrated onto a flexible substrate. This makes OLED an ideal light source choice for wearable applications, and related patent applications in recent years have covered various fields. Patent applications CN205108772U, CN204951964U and US2012155057A1 all mention that OLED light sources can be used as wearable products for medical treatment. Application CN203694423U and the inventor's previous application CN109173071A mention using OLED to prepare a phototherapy mask. Although there are embodiments for facial phototherapy in the above applications, they do not have a dust filtering function, and the mouth and nose parts are exposed. The multifunctional mask in this application integrates a flexible OLED light source on the face, while still adopting a traditional filter mask structure at the mouth and nose parts, which can organically combine phototherapy and dust filtering, greatly improving the functionality of the mask.

[0005] At present, non-woven fabric masks with colors and patterns on the outside are already available on the market to meet people's comprehensive appearance needs in different situations and even express inner emotions. Some masks are even designed with LED beads or fibers integrated on the part facing away from the human face, which can emit light or even display patterns (https: / / baijiahao.baidu.com / s?id=1673325260088071888&wfr=spider&for=pc, https: / / item.jd.com / 10035944609757.html). It can be seen that masks have evolved from traditional protective items into fashion items. All of the above-mentioned masks use LED beads. To achieve a certain range of coverage across the entire face, at least dozens of beads are required, along with circuits and drivers, which will inevitably increase the weight of the mask and reduce the wearing comfort. Moreover, the functions that such masks can achieve are relatively single, limited to external display only, and the side facing the human face is still made of gauze or non-woven fabric. Patent application CN104814544A mentions a smart wearable device in the form of a mask, which integrates an air detection unit and a display unit, and displays air detection results on the display on the outer surface of the mask. Here, the display screen needs to be connected to the air detection system to display air indicators. Therefore, it only displays fixed information, usually numbers or individual words, and is a very small piece, and it is not in the cheek area, and there is no light source on the side facing the human face. Patent application CN109559751A discloses a mouth shape conversion mask for deaf-mute people. It captures the mouth shapes of deaf-mute people through a micro high-definition camera set inside the mask, and then compares them with the pre-recorded mouth shapes through a single-chip microcomputer, so as to feedback the actual speech content of the wearer and display it on the display on the outside of the mask, and at the same time broadcast it through a speaker. Although the mask in this application also integrates a camera and a display, the display only shows text and does not display images. Such a display can be made smaller, so it can be any hard screen. Most importantly, there is no light source integrated on the side facing the human face. Patent applications CN210747390U and CN213281602U disclose masks using OLED light sources as external display screens. Neither of them integrates any light source on the side facing the human face, nor mentions any light therapy effect of the light source on the human body. Patent application CN111227376A discloses a mask with a light-emitting layer, and the light-emitting layer contains ultraviolet light-emitting diode light sources that emit light outward, which is only used to emit ultraviolet light outward to make the mask have a sterilization function, and there is no light source integrated on the side facing the human face either, neither mentioning any light therapy effect on the human body nor the display function of the mask.

[0006] Since the existing masks integrated with LED or OLED light sources are mostly used for the outward display function, the light sources do not pay attention to the phototherapy effect on the human body. Therefore, how to develop a new type of multifunctional mask that not only has the dust-proof filtering effect of ordinary masks but also can achieve the phototherapy effect on the human face cheek area is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0007] The present invention aims to provide a multifunctional phototherapy mask integrated with an OLED light source to at least solve some of the above problems.

[0008] According to an embodiment of the present invention, a multifunctional phototherapy mask includes:

[0009] A first housing, a second housing, a first flexible OLED light source, a driving device, and a fixing device;

[0010] Wherein the first housing covers at least part of the human face cheek area;

[0011] The second housing covers at least part of the human mouth and / or nose area;

[0012] The flexible OLED light source includes at least one OLED device;

[0013] The first flexible OLED light source has at least one light-emitting surface, and the light-emitting surface faces the human face side and can cover at least part of the human face cheek;

[0014] The first flexible OLED light source is disposed on the first housing, and the first flexible OLED light source emits light including a peak wavelength in the range of 600 - 1000 nm;

[0015] The flexible OLED light source is electrically connected to the driving device;

[0016] The fixing device is disposed on the first housing and / or the second housing.

[0017] According to an embodiment of the present invention, the first housing can cover at least part of the human face cheek area and at least part of the nose area (such as the upper part of the nose area).

[0018] According to an embodiment of the present invention, the first housing can cover at least part of the human face cheek area and there are cutouts in at least part of the mouth and nose area.

[0019] According to an embodiment of the present invention, the first housing can further cover at least part of the human face jaw area.

[0020] According to an embodiment of the present invention, the OLED device is a bottom-emitting device, a top-emitting device, or a double-sided light-emitting device.

[0021] According to an embodiment of the present invention, the OLED device is a single-layer device or a stacked device.

[0022] According to an embodiment of the present invention, the first flexible OLED light source further includes a second light-emitting surface that emits light toward the side away from the human face.

[0023] According to an embodiment of the present invention, the light therapy mask further includes a second flexible OLED light source, the second flexible OLED light source includes at least one light-emitting surface, and at least one of the light-emitting surfaces emits light toward the side away from the human face.

[0024] According to an embodiment of the present invention, the second flexible OLED light source includes at least two OLED devices, and the two OLED devices can emit light of different wavelengths.

[0025] According to an embodiment of the present invention, the second flexible OLED light source is a full-color OLED display screen.

[0026] According to an embodiment of the present invention, the material of the first housing is selected from leather, cotton, linen, silk, silicone, non-woven fabric, plastic, or a combination thereof.

[0027] According to an embodiment of the present invention, the material of the first housing is selected from medical silicone, natural leather, or silk fabric.

[0028] According to an embodiment of the present invention, the material of the second housing includes cotton, linen, silk, non-woven fabric, or a combination thereof.

[0029] According to an embodiment of the present invention, the second housing further includes a filtering material.

[0030] According to an embodiment of the present invention, the filtering material is selected from one or more of ultra-fine polypropylene fiber meltblown material, bamboo charcoal fiber, and activated carbon.

[0031] According to an embodiment of the present invention, the first housing and the second housing can be connected by a fixed connection method or a detachable connection structure.

[0032] According to an embodiment of the present invention, the fixed connection method is pasting, stitching, or pressing.

[0033] According to an embodiment of the present invention, the detachable connection structure is selected from Velcro, buckle, zipper, or mortise and tenon structure.

[0034] According to an embodiment of the present invention, the second housing can further cover at least part of the human face cheek area.

[0035] According to an embodiment of the present invention, the second housing is a common mask.

[0036] According to an embodiment of the present invention, the second housing is disposable or detachable.

[0037] According to an embodiment of the present invention, the driving device includes any one or more of the following components: a power source, a charging device, a Bluetooth communication device, a chip, a lead, a circuit board, and a switch.

[0038] According to an embodiment of the present invention, the charging device is a wireless charging device.

[0039] According to an embodiment of the present invention, the power source includes a battery.

[0040] According to an embodiment of the present invention, the battery is selected from any one or more of the following: a thin-film battery, a micro battery, a button battery, a chemical battery, a lithium battery, and a hydrogen battery.

[0041] According to an embodiment of the present invention, the driving device can be wirelessly connected to an external electronic device.

[0042] According to an embodiment of the present invention, the driving device includes a Bluetooth communication device and can be wirelessly connected to an external electronic device through the Bluetooth communication device.

[0043] According to an embodiment of the present invention, the external electronic device further includes an application program, and the external electronic device can drive or control the flexible OLED light source through the application program.

[0044] According to an embodiment of the present invention, the fixing device is selected from straps, ear hooks, elastic bands, buttons, zippers, Velcro, or a combination thereof.

[0045] According to an embodiment of the present invention, the light therapy mask further includes a skin-friendly layer, and the skin-friendly layer is disposed on the light-emitting surface of the OLED light source facing the human face.

[0046] According to an embodiment of the present invention, the material of the skin-friendly layer is selected from medical silicone, cotton, linen, silk, or a combination thereof.

[0047] According to an embodiment of the present invention, the multifunctional light therapy mask described in any of the foregoing embodiments can be used in combination with a common mask.

[0048] The present invention discloses a multifunctional phototherapy mask. A first flexible OLED light source is integrated on a first housing covering the cheek regions of the human face. The first flexible OLED light source has at least one light-emitting surface that emits light toward the human face side, and it can emit red light to near-infrared light with a peak wavelength in the range of 600 - 1000 nm for performing phototherapy such as wrinkle removal, skin tightening, and whitening on the human face. In addition, a second housing is provided in the mask covering the mouth and nose regions of the human face. It still uses a material with filtering performance to provide the core function of a common mask. The second housing is preferably detachable, thereby improving the recycling rate of the phototherapy mask and making it more environmentally friendly and convenient. In particular, a second flexible OLED light source can also be integrated on the first housing. It has at least one light-emitting surface that emits light away from the human face side. It can be an illumination panel or a full-color OLED display screen, used to display a matching color, or even a dynamic pattern on the outer side of the mask according to the clothes of the day to match the scene or mood. The phototherapy mask also includes a driving device for providing driving to the flexible OLED light source and performing controls such as brightness adjustment, area regulation, and image selection. Further, the driving device can also communicate with an external electronic device (such as a mobile phone), and through a mobile phone APP (application program), select the area to be lit, the brightness level, or control the color or pattern displayed by the second flexible OLED light source. Such a multifunctional mask can not only achieve the medical effects of blocking dust, bacteria, viruses, etc., but also perform phototherapy on the face at the same time, and can also display a matching color, or even a dynamic pattern on the outer side of the mask according to the clothes of the day to match the occasion or mood, achieving multiple benefits with one action. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1a-1c is a schematic structural diagram of a single-layer OLED device.

[0050] Figure 2 is a schematic structural diagram of a stacked OLED device.

[0051] Figure 3a-3d is a schematic cross-sectional diagram of an OLED light-emitting panel.

[0052] Figure 4a is a schematic structural diagram of a multifunctional phototherapy mask 400.

[0053] Figure 4b is an exploded structural diagram of a multifunctional phototherapy mask 400.

[0054] Figure 4c is a schematic structural diagram of some components of a multifunctional phototherapy mask 400.

[0055] Figure 5a-5c is a schematic structural diagram of an OLED light-emitting panel.

[0056] Figure 6It is a schematic structural diagram of the multifunctional phototherapy mask 600.

[0057] Figure 7a It is a schematic structural diagram of the multifunctional phototherapy mask 700.

[0058] Figure 7b It is a schematic structural diagram of another multifunctional phototherapy mask 700.

[0059] Figure 8 It is a schematic structural diagram of the multifunctional phototherapy mask 800. Detailed implementation mode

[0060] As used herein, "top" means farthest from the substrate, and "bottom" means closest to the substrate. In the case where the first layer is described as being "disposed" "on" the second layer, the first layer is disposed farther from the substrate. Conversely, in the case where the first layer is described as being "disposed" "under" the second layer, the first layer is disposed closer to the substrate. Unless it is specified that the first layer "contacts" the second layer, there may be other layers between the first and second layers. For example, even if there are various organic layers between the cathode and the anode, the cathode can still be described as being "disposed" "on" the anode.

[0061] As used herein, the term "OLED device" includes an anode layer, a cathode layer, and one or more organic layers disposed between the anode layer and the cathode layer. An "OLED device" can be bottom-emitting (bottom emission), that is, emitting light from the anode side, or top-emitting (top emission), that is, emitting light from the cathode side, or a double-sided emitting device, that is, emitting light from both the anode and the cathode simultaneously.

[0062] As used herein, the term "OLED light-emitting panel" includes a substrate, an anode layer, a cathode layer, one or more organic layers disposed between the anode layer and the cathode layer, a packaging layer, and at least one anode contact and at least one cathode contact extending outside the packaging layer for external access.

[0063] As used herein, the term "OLED light source" refers to a light source including one or more OLED light-emitting panels, where the OLED light-emitting panel can include one or more OLED devices.

[0064] As used herein, the term "packaging layer" can be a thin-film package with a thickness less than 100 microns, which includes directly disposing one or more thin films on the device, or it can also be a cover glass adhered to the substrate.

[0065] As used herein, the term "flexible printed circuit" (FPC) refers to any flexible substrate coated with any one or a combination of the following, including but not limited to: conductive wires, resistors, capacitors, inductors, transistors, microelectromechanical systems (MEMS), and so on. The flexible substrate of the flexible printed circuit can be plastic, thin glass, thin metal foil coated with an insulating layer, fabric, leather, paper, and so on. A flexible printed circuit board generally has a thickness of less than 1 mm, and more preferably, a thickness of less than 0.7 mm.

[0066] As used herein, the term "light extraction layer" may refer to a light diffusing film, or other microstructures with light extraction effects, or a thin film coating with an external light coupling effect. The light extraction layer can be disposed on the surface of the substrate of the OLED, or at other suitable positions, such as between the substrate and the anode, between the organic layer and the cathode, between the cathode and the encapsulation layer, or on the surface of the encapsulation layer, and so on.

[0067] As used herein, the term "independent drive" means that the operating points of two or more light-emitting panels (or OLED devices) are separately controlled. Although these light-emitting panels (or OLED devices) can be connected to the same controller or power line, there can be a circuit to divide the drive paths and supply power to each light-emitting panel (or OLED device) without affecting each other.

[0068] As used herein, the term "effective light-emitting area" refers to the portion of the planar area where the anode, organic layer, and cathode coincide, excluding the light extraction effect.

[0069] As used herein, the term "light-emitting surface" refers to the surface from which the light source emits light. For example, if the light source includes a bottom-emitting OLED light-emitting device (panel), then the "light-emitting surface" includes the surface of the substrate away from the anode; if it is a top-emitting device, then the "light-emitting surface" includes the surface of the encapsulation layer away from the cathode.

[0070] As used herein, the term "single-layer device" refers to a device having a light-emitting layer (or multiple continuous light-emitting layers) and a single set of hole and electron transport layers that match therewith between a pair of anode and cathode. Such a device having a single light-emitting layer (or multiple continuous light-emitting layers) and its supporting transport layers is a "single-layer device".

[0071] As used herein, the term "stacked device" refers to a device structure having multiple light-emitting layers between a pair of anode and cathode, and each light-emitting layer has its own independent hole transport layer and electron transport layer. Each light-emitting layer and its supporting hole transport layer and electron transport layer form a single light-emitting layer, and these single light-emitting layers are connected by charge generation layers. A device having such multiple single light-emitting layers is a "stacked device".

[0072] As used herein, the term "ordinary mask" can be any form of mask available on the market, including but not limited to a simple mask formed by laminating one or more non-woven fabrics, a medical mask containing a filter layer, an N95 mask, etc.

[0073] A schematic diagram of the structure of a typical single-layer OLED device 100 is shown as Figure 1a follows. Among them, the OLED device 100 includes an anode layer 101, a hole injection layer (HIL) 102, a hole transport layer (HTL) 103, an electron blocking layer (EBL) 104, an emission layer (EML) 105, a hole blocking layer (HBL) 106, an electron transport layer (ETL) 107, an electron injection layer (EIL) 108, a cathode layer 109, and a capping layer (CPL) 110. In a bottom-emission device, the anode layer 101 is made of a transparent or semi-transparent material, including but not limited to ITO, IZO, MoOx (molybdenum oxide), etc., and its transparency is generally greater than 50%; preferably, the transparency is greater than 70%; the cathode layer 109 is a material with a high reflectivity, including but not limited to Al, Ag, etc., and the reflectivity is greater than 70%; preferably, the reflectivity is greater than 90%. In a top-emission device, the anode layer 101 is a material or a combination of materials with a high reflectivity, including but not limited to Ag, Ti, Cr, Pt, Ni, TiN, and a combination of the above materials with ITO and / or MoOx (molybdenum oxide), and usually the reflectivity is greater than 50%; preferably, the reflectivity is greater than 80%; more preferably, the reflectivity is greater than 90%. And the cathode layer 109 should be a semi-transparent or transparent conductive material, including but not limited to MgAg alloy, MoOx, Yb, Ca, ITO, IZO or a combination thereof, and its transparency is generally greater than 30%; preferably, the transparency is greater than 50%. The hole injection layer 102 can be a single material layer, such as the commonly used HATCN; the hole injection layer 102 can also be a hole transport material doped with a certain proportion of p-type conductive doping material, usually the doping proportion is not higher than 5%, and commonly between 1% and 3%. The emission layer 105 usually further includes at least one host material and at least one luminescent material, and the electron blocking layer 104 and the hole blocking layer 106 are optional layers, and the capping layer 110 is not required in a bottom-emission device. The electron transport layer 107 can be a single layer of Yb, LiQ or LiF, or can be formed by co-evaporating more than 2 materials. Figure 1bIt is a schematic structural diagram of a multi-color OLED device 130. With other layers unchanged, the light-emitting layer can include a light-emitting layer 1051 and a light-emitting layer 1052. The peak wavelength of the light-emitting layer 1051 can be between 600 - 750 nm (emitting red light), and the peak wavelength of the light-emitting layer 1052 can be between 750 - 1000 nm (emitting near-infrared light). Note that the order of these two light-emitting layers can also be reversed, that is, the light-emitting layer 1051 emits near-infrared light and the light-emitting layer 1052 emits red light. The OLED device with this structure can emit red light and near-infrared light simultaneously. Figure 1c It is a schematic structural diagram of a color-changeable OLED device 120, which has a light-emitting layer 1053, a light-emitting layer 1055, and an adjustment layer 1054. The adjustment layer 1054 can regulate the movement of electrons and holes at different current densities, thereby achieving color regulation. For example, the peak wavelength of the light-emitting layer 1053 can be between 600 - 750 nm (emitting red light), and the peak wavelength of the light-emitting layer 1055 can be between 750 - 1000 nm (emitting near-infrared light). At low current density, the exciton recombination region is mainly close to the cathode side, that is, in the light-emitting layer 1053. At this time, the OLED device 120 can emit red light; when gradually increasing the injection, raising the voltage and current density, the exciton recombination region moves towards the anode side and finally enters the near light-emitting layer 1055. At this time, the OLED device 120 emits near-infrared light. Of course, it is also possible that the light-emitting layer 1053 emits near-infrared light and the light-emitting layer 1055 emits red light, and vice versa. For the specific structure of the color-changeable OLED device and the use of the adjustment layer, reference can be made to the previous patent applications CN111081891A and CN111081892A of the present inventor.

[0074] A schematic structural diagram of a typical stacked OLED device 200 is as Figure 2As shown, it includes an anode layer 201, a first light-emitting unit 202, a charge generation layer (CGL) 203, a second light-emitting unit 204, and a cathode layer 205. Among them, the first light-emitting unit 202 and the second light-emitting unit 204 may further include a series of organic layers from the hole injection layer 102 to the electron injection layer 108 in the single-layer light-emitting device 100. The light-emitting layers of the first light-emitting unit 202 and the second light-emitting unit 204 may be the same or different. The first light-emitting unit 202 and the second light-emitting unit 204 may emit light of the same color, such as red light with a peak wavelength between 600 - 750 nm; the first light-emitting unit 202 and the second light-emitting unit 204 may also emit light of different colors. For example, the first light-emitting unit 202 emits red light, and the second light-emitting unit 204 emits near-infrared light with a peak wavelength between 750 - 1000 nm. In this case, the device 200 can emit red light and near-infrared light simultaneously. The charge generation layer 203 is generally composed of an n-type material and a p-type material, and a buffer layer may also be added, as described in the patent application CN112687811A. If the stacked device is a top-emitting device, a capping layer (not shown in the figure) may also be added on top of the cathode layer 205. Figure 2 The shown device is a two-unit stacked device, and a third light-emitting unit and a second charge generation layer can be added on this basis to form a three-unit stacked device. The preparation of single-layer and stacked OLED devices is well-known in the industry and will not be elaborated here.

[0075] Arranging the above single-layer or stacked OLED devices in a red-green-blue side-by-side (horizontally juxtaposed) form can be used to make pixelated lighting (Proc. SID Int. Symp. Dig. Tech. Papers (47.1) 2014) or full-color display, and then different colors or full-color functions can be displayed on a panel through circuit control. The preparation of OLED lighting and full-color display is well-known in the industry and will not be elaborated here.

[0076] A kind of light source that can be used in a multifunctional mask is a flexible organic light-emitting device (OLED). A cross-sectional schematic diagram of a flexible OLED light-emitting panel is shown in Figure 3a-3d In Figure 3aAmong them, the OLED light-emitting panel 300 includes a substrate 301, an OLED device 310, a pair of contact electrodes 303 electrically connected to the OLED device 310, a packaging layer 302 (exposing the contact electrodes 303), and an adhesive structure 304 connecting the pair of contact electrodes 303 to an external driving circuit. The substrate 301 is flexible and includes, but is not limited to, ultra-thin flexible glass, PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PI (polyimide), etc. In particular, the substrate 301 can be a material (such as PI material) previously coated on a support substrate in solution form, and after curing and planarization, it is used for device preparation. After device preparation is completed, it is peeled off from the support substrate using a laser and transferred to other flexible substrates as needed. The OLED device 310 can be a bottom-emitting device or a top-emitting device. Preferably, the OLED device 310 is a top-emitting device because of its higher luminous efficiency. The OLED device 310 can be a single-layer structure or a stacked structure. Preferably, the OLED device 310 has a stacked structure because its lifespan is longer at the same brightness, and because the thicker film layer is beneficial to improving the production yield. The organic materials in the OLED device 310 can be formed by thermal evaporation in a vacuum chamber, or partially or entirely using solution methods, including but not limited to ink jet printing, spin coating, organic vapor jet printing (OVJP), etc. The packaging layer 302 is a thin-film packaging layer, usually with a thickness of more than 10 μm, such as a single-layer inorganic layer, or a multi-layer structure of alternating thin-film organic and inorganic layers, formed by plasma-enhanced chemical vapor deposition (PECVD), atomic layer deposition (ALD), printing, spin coating, etc. The contact electrodes 303 can include at least one anode contact and at least one cathode contact. A front cover film 305 can be added to the above OLED light-emitting panel, as Figure 3b shown. The front cover film 305 can be a flexible printed circuit (FPC) board, on which a pre-designed circuit is printed and electrically connected to the OLED device 310 through the adhesive structure 304. In another solution, the adhesive structure 304 can be an FPC frame, and the front cover film 305 can be a plastic film to provide mechanical support. The specific description of using an FPC board to drive the OLED light-emitting panel can be found in the patent application US20190376650A1, which is incorporated herein by reference in its entirety and is not within the scope of the detailed description of this application. The front cover film 305 can also include a light extraction layer. When the OLED device 310 is a top-emitting device, the front cover film 305 is transparent in the light-emitting area. The front cover film 305 can be a combination of the above various forms. An additional thin-film packaging layer 306 can be coated on one or both sides of the substrate 301, as Figure 3c shown. The front cover film can also be coated with an additional thin-film packaging layer 306, but it is not shown in the figure here. InFigure 3d In this case, the back cover film 307 is covered onto the substrate 301. The back cover film 307 can be used for mechanical support and is usually a flexible film, such as a plastic like PET. When the OLED is a bottom-emitting device, the back cover film 307 can be a light extraction layer and is transparent. The back cover film 307 can be a combination of the above various forms.

[0077] A complete flexible OLED light source can be included in a multifunctional mask, but this method usually places high requirements on the production yield of OLEDs. Another more realistic method is to integrate an OLED light source composed of a series of flexible OLED light-emitting panels in the mask. Each flexible panel can be independently driven, or can be grouped according to the corresponding facial parts. The panels within a group can be driven simultaneously, and the panels in different groups can be independently driven respectively. At the same time, different emission wavelengths can be selected according to the treatment needs. For example, emitting 600 nm for whitening because the wavelength of this band has the most significant effect on melanin, and emitting light with a wavelength of 700 nm for moisturizing and skin rejuvenation because the light of this band will be absorbed by the water in the human body. Such a phototherapy mask can simultaneously achieve multiple effects such as whitening, wrinkle removal, and skin rejuvenation, killing multiple birds with one stone. The methods to achieve this zonal control can be as follows:

[0078] The first is to design a pixelated layout on the same flexible OLED light-emitting panel, and then independently drive each pixel, or group the pixels and then independently drive different groups. The OLED light-emitting panel is flexible, that is, a flexible substrate and thin-film encapsulation are used. The pixels here usually have a light-emitting area on the order of millimeters, that is, the minimum size is greater than 1 mm 2 , preferably greater than 5 mm 2 . For example, Figure 5a as shown, a flexible OLED light-emitting panel 500 can include a flexible OLED substrate 501, on which a series of OLED devices 502 are fabricated through patterning. These devices all share the same thin-film encapsulation layer 503. At this time, each light-emitting unit is an OLED device, and the entire flexible OLED light-emitting panel is a light source. At this time, the metal wiring can be arranged on the panel while fabricating the anode or cathode to electrically connect each OLED device 502. The method of metal wiring is well known to those in the art and will not be elaborated here. By controlling different OLED devices through a circuit control system, different devices can emit different colors of light, or the same device can operate at different currents to achieve multiple colors.

[0079] A variation of this solution is as Figure 5bThe flexible OLED light-emitting panel 510 shown contains a flexible OLED substrate 501 and a series of OLED devices 502. However, each device has a separate encapsulation layer 513, and preferably, the encapsulation layer is a thin-film encapsulation layer. At this time, different OLED devices 502 can be connected not only through metal wiring but also through an FPC circuit board, greatly improving the possibility of conductivity and circuit complexity. Similarly, through these electrical connections, single or multiple OLED devices 502 can be independently driven. In both of the above cases, if different colors of light are to be emitted, a metal shadow mask can be used to evaporate different device structures on different OLED devices, especially changing the material of the light-emitting layer; alternatively, as described in patent applications CN111081892A and CN111081891A, all devices use the same structure of independent unit multi-light-emitting layers, and color changes are achieved by moving the recombination region at different operating points.

[0080] Another solution is to form an array of independent OLED light-emitting panels, as Figure 5c shown. At this time, each OLED light-emitting panel contains an independent substrate 521, an OLED device 502, and an independent encapsulation layer 513. The advantage of this arrangement is that non-flexible OLED light-emitting panels and / or non-flexible encapsulation layers can be selected. As long as the area of each OLED light-emitting panel is small enough, the light source after forming the array can still have a certain flexibility, but preferably each independent OLED light-emitting panel is also flexible. These independent OLED light-emitting panels can be cut from the same mother board, for example, all using the same structure of independent unit multi-light-emitting layers, or devices with different structures can be selected from different mother boards and reassembled. The advantage of this solution is that the devices can be screened, the yield is improved, and the color diversity of the product is increased. Figure 5c The independent light-emitting panels shown can be arranged and combined according to requirements through an FPC or front and rear cover films, etc., to form a dot matrix physically connected to each other. Specifically, the method disclosed in CN208750423U can be referred to, which is not the focus of this application and will not be elaborated here. Similarly, these panels can be independently controlled to give different operating currents.

[0081] As Figure 4aIt is a schematic structural diagram of a multifunctional phototherapy mask 400, which includes a first housing 401, a second housing 402, a first flexible OLED light source 403, a driving device 404 and a fixing device 405. The first housing 401 covers part of the human face cheek area and is hollowed out in part of the mouth and nose area, and the second housing 402 covers part of the mouth and nose area of the human face. The material of the first housing 401 includes but is not limited to leather, cotton, linen, silk, silica gel, non-woven fabric, plastic, etc., and preferably medical silica gel, natural leather, and silk fabric. The material of the second housing 402 includes but is not limited to cotton, silk, linen, non-woven fabric, etc. The second housing 402 can further include a filtering material to achieve the effect of filtering dust, and the filtering material includes but is not limited to ultra-fine polypropylene fiber meltblown material, bamboo charcoal fiber, activated carbon, etc. The fixing device 405 in the phototherapy mask 400 is embodied in the form of ear hooks, but the fixing device 405 can also be in other forms, including but not limited to straps, elastic bands, buttons, zippers, Velcro, etc., and its function is to fix the phototherapy mask on the user's face. The first flexible OLED light source 403 is integrated on the left and right sides of the first housing 401 corresponding to the cheeks of the human face, and it includes two flexible OLED light-emitting panels each having at least one light-emitting surface (see Figure 4b ), and emits light toward the human cheek area. The flexible OLED light-emitting panel of the phototherapy mask 400 can emit red light and near-infrared light with a peak wavelength in the range of 600-1000 nm to perform treatments such as wrinkle removal, skin tightening, and whitening on the face. For a more comfortable wearing experience, the phototherapy mask 400 can further include a skin-friendly layer (not shown in the figure), which is arranged on the side of the OLED light-emitting panel facing the human face. The material of the skin-friendly layer includes but is not limited to a mesh fabric composed of natural cotton, silk, linen, etc. to ensure light transmittance; it can also be a material such as medical silica gel that is transparent itself. The driving device 404 is also integrated on the first housing 401, and it is electrically connected to the first flexible OLED light source 403, and the electrical connection includes but is not limited to one or more of thin-film metal, transparent conductive material, and FPC lead. The driving device 404 includes but is not limited to one or more of a power supply, a charging device (preferably a wireless charging device), a Bluetooth communication device, a chip, a lead, a circuit board, a switch and other devices, and the power supply includes a battery, and the battery can be selected from one or more of a thin-film battery, a micro battery, a button battery, a chemical battery, a lithium battery, and a hydrogen battery. The driving device 404 can also be wirelessly connected to an external electronic device through the Bluetooth communication device and be controlled by the external electronic device, such as switching, brightness adjustment, and zone control. The external electronic device can be a device such as a smart phone, a smart watch, a tablet computer, a notebook computer, a computer, etc. Further, it can also be controlled in combination with an application program (APP).

[0082] In the phototherapy mask 400, the first housing 401 and the second housing 402 can be connected by a fixing method including but not limited to stitching, pasting, or pressing. However, a more preferred way is that the phototherapy mask 400 can further include a detachable connection structure for connecting the first housing 401 and the second housing 402. The connection structure includes but is not limited to: Velcro, buckle, zipper, or mortise and tenon structure, etc. Here, only the mortise and tenon structure (the slot 4013 and the fitting 4012) as shown in Figure 4b (Exploded structure schematic diagram of the phototherapy mask 400) and Figure 4c (Partial component structure schematic diagram of the phototherapy mask 400) is taken as an example. As shown in Figure 4b , the first housing 401 of the phototherapy mask 400 further includes a structure 4011, a slot 4013, and a fitting 4012. The structure 4011 is the hollowed-out part of the first housing 401 (i.e., the partial oral and nasal area). The slot 4013 and the fitting 4012 in the mortise and tenon structure have corresponding grooves and tenons. The slot 4013 and the fitting 4012 are a closed ring structure, and their material is preferably plastic, which has a certain hardness and toughness and can have slight deformation for the two to be aligned and engaged. The selection of such materials is well-known to professionals in this field and is not the focus of this application, so it will not be elaborated here. During assembly, first align the edge part of the second housing 402 with the slot 4013 of the first housing 401 or completely cover it, and then align the tenon of the fitting 4012 with the groove part of the slot 4013 covered with the second housing 402 and push it into the slot forcefully. In this way, the second housing 402 sandwiched in the middle is fixed in a detachable manner. At this time, the second housing 402 covers the hollowed-out part of the first housing 401 (i.e., the corresponding partial oral and nasal area of the human face). The second housing 402 can be a disposable consumable, such as non-woven fabric, gauze, etc. Preferably, it can further include a filtering material. After use, the slot 4013 and the fitting 4012 can be removed and a new and clean second housing 402 can be replaced. Such a design can improve the recycling rate of the phototherapy mask and make it more environmentally friendly and convenient.

[0083] In order to improve the yield and achieve zonal control, an effective improvement method is to perform pixelation or block design on the flexible OLED light source as shown in Figure 5a-5c , Figure 6A multifunctional phototherapy mask 600 as shown adopts such a design. In this design, the phototherapy mask 600 includes a first housing 601, a second housing 602, a first flexible OLED light source 603, a driving device 604 and a fixing device 605. The first flexible OLED light source 603 includes 6 flexible OLED light-emitting panels. Narrowing the area of a single OLED light-emitting panel can not only improve the preparation efficiency and service life of the OLED light-emitting panel, but also better achieve a three-dimensional structure to better fit the human face and enhance the experience during use. Each flexible OLED light-emitting panel can have a different layout, preferably the same layout (as shown in Figure 6 ). This can further reduce the preparation cost. These flexible OLED light-emitting panels can emit light of the same color or different colors. These flexible OLED light-emitting panels can be uniformly driven by the driving device 604 or independently driven. In particular, they can be independently driven to zone-light and adjust the brightness of the panels. This targeted zone-driving method can further reduce power consumption. In addition, different-color OLED light-emitting panels can be integrated to achieve different treatment effects. For example, at a certain moment, the light-emitting panel with a peak emission wavelength of 700 nm can be lit to moisturize and rejuvenate the skin, and at another moment, the light-emitting panel with a peak emission wavelength of 600 nm can be lit for whitening. These selections can be controlled and adjusted through an external electronic device (preferably, a mobile phone APP) connected to the driving device. Note that although splitting a single flexible OLED light-emitting panel into small-area panels can improve the preparation yield, it will reduce the effective light-emitting area. Therefore, the light-emitting area of a single flexible OLED light-emitting panel should not be too small, and should not be less than 1 cm 2 , preferably not less than 10 cm 2 , more preferably not less than 20 cm 2 . The layout of multiple OLED light-emitting panels can be prepared with reference to the form shown in Figure 5a-5c .

[0084] In addition to integrating flexible OLED light-emitting panels on the side facing the human face in the phototherapy mask for human facial phototherapy, flexible OLED light-emitting panels can also be integrated on the side facing away from the human face (the side far from the human face) of the phototherapy mask to display various colors and even patterns. As shown in Figure 7aSchematic diagram of the structure of a multifunctional phototherapy mask 700, which includes a first housing 701, a second housing 702, a first flexible OLED light source 703, a driving device 704, a fixing device 705, and a second flexible OLED light source 706. Among them, the first flexible OLED light source 703 includes at least one light-emitting surface that emits light toward the human face side and can at least cover part of the cheeks of the human face. It can emit light with a peak wavelength in the range of 600 - 1000 nm, and has the effects of whitening, wrinkle removal, and skin rejuvenation on the cheek area; while the second flexible OLED light source 706 has at least one light-emitting surface that emits light toward the side away from the human face, serving as a lighting or display function. Both the first flexible OLED light source 703 and the second flexible OLED light source 706 are integrated on the first housing 701. Specific implementation methods include, but are not limited to: the part of the first housing 701 where the flexible OLED light source is arranged is hollowed out, and the area of the hollowed-out area is smaller than the area of the flexible OLED light source. At this time, the edge of the hollowed-out area of the first housing 701 overlaps with the edges of the flexible OLED light sources 703 and 706, and the flexible OLED light sources 703 and 706 are fixed by pasting the overlapping parts onto the first housing 701. Another possible way is that the first housing 701 is made of a transparent or semi-transparent material, and the flexible OLED light sources 703 and 706 are bonded back-to-back (i.e., the non-light-emitting surfaces), and the combined flexible light source 703 and 706 after bonding is arranged on either side of the housing 701. That is, one of the flexible OLED light sources will contact the housing. Since the first housing 701 is transparent, light can pass through both sides of the housing at this time, ensuring its light-emitting effect; preferably, the first flexible OLED light source 703 contacts the first housing 701, and the first housing 701 is a skin-friendly material; or the material of the first housing 701 is a mesh fabric composed of cotton, silk, linen, etc. to ensure the light-emitting effect. In addition, according to the different light-emitting directions of the light-emitting surfaces, the first flexible OLED light source 703 can be arranged on the inner surface (toward the human face side) of the first housing 701 to ensure its phototherapy effect, and the second flexible OLED light source 706 can be arranged on the outer surface (away from the human face side) of the first housing 701 to ensure its display effect. The second flexible OLED light source 706 can adopt the same layout as the first flexible OLED light source 703 (such as Figure 7a shown), and it can include bottom-emitting devices, top-emitting devices, and / or double-sided emitting OLED devices. Of course, the second flexible OLED light source 706 can also adopt a layout different from that of the first flexible light source 703 (such as Figure 7bAs shown). Preferably, the second flexible OLED light source 706 can adopt a layout form of red, green, and blue pixels side-by-side (horizontally juxtaposed). By connecting all the red pixels in parallel, all the green pixel circuits in parallel, and all the blue pixels in parallel, multi-color emission can be achieved. For specific details, reference can be made to Proc. SID Int. Symp. Dig. Tech. Papers (47.1) 2014, which is not the focus of this application and will not be elaborated here. The second flexible OLED light source 706 can also be a flexible full-color OLED display screen, which can display static or dynamic patterns. The second flexible OLED light source 706 can have a separate driving device or share the same driving device with the first flexible OLED light source 703. As Figure 7b When the multifunctional mask 700 shown is in use, it can light up the first flexible OLED light source 703 to perform phototherapy on the face, and at the same time, it can also light up the second flexible OLED light source 706 to display different colors or patterns to match the color of the outerwear or a special occasion, which not only ensures the practicality of the mask but also further enhances the fashionability of the mask and meets the needs of different people.

[0085] As Figure 8 A multifunctional phototherapy mask 800 shown includes a first housing 801, a second housing 802, a first flexible OLED light source 803, a driving device 804, and a fixing device 805. The first flexible OLED light source 803 integrated on the first housing 801 includes two flexible OLED light-emitting panels, each of which has at least one light-emitting surface facing the human cheek area to emit light. The part of the first housing 801 covering the human mouth and nose area is a hollow structure, and the second housing 802 completely covers the first housing 801 and further includes the mouth and nose area. Preferably, the second housing 802 can be any existing form of mask on the market. At this time, the fixing device 805 can be ear hooks integrated on the second housing 802. Of course, the fixing device 805 can also be integrated on the first housing 801. In this design, the first housing 801 and the second housing 802 can still be connected in a detachable manner using a mortise and tenon connection structure similar to Figure 4c shown, or other detachable connection structures including but not limited to Velcro, buckles, zippers, etc. can be used. In addition, the fixing device 805 can also be set on both the first housing 801 and the second housing 802 at the same time. At this time, there is no need for a connection structure between the first housing and the second housing, and only two fixing devices are needed to fix the phototherapy mask on the human face during use. Such a phototherapy mask 800 looks the same as an ordinary mask from the outside, but at the same time has the functions of phototherapy for the human cheek and dust filtration of an ordinary mask.

[0086] On the basis of the functions of ordinary masks in blocking dust, bacteria, viruses, etc., the multifunctional phototherapy mask disclosed in the present invention adds the function of phototherapy. A first flexible OLED light source is integrated on the first housing, and at least one light-emitting surface of the first flexible OLED light source emits light toward the human face side. It can emit red light and near-infrared light with peak wavelengths in the range of 600 - 1000 nm for phototherapy such as wrinkle removal, skin tightening, and whitening of the human face. The phototherapy mask can also integrate a second flexible OLED light source on the first housing, which has at least one light-emitting surface and emits light toward the side away from the human face. It can be an illumination panel or a full-color OLED display screen, and can display matching colors, and even dynamic patterns on the outer side of the mask according to the clothes of the day to match the scene or mood. A second housing is provided in the mouth and nose area of the phototherapy mask covering the human face, and it still uses a material with filtering performance to provide the core function of dust prevention and filtration of traditional masks. Further, the second housing can be detachable, preferably a commercially available ordinary mask. Such a design can improve the recycling rate of the phototherapy mask, making it more environmentally friendly and convenient, and further enhancing the practicality of the phototherapy mask, which can kill multiple birds with one stone.

[0087] It should be understood that the various embodiments described herein are merely examples and are not intended to limit the scope of the present invention. Therefore, as will be apparent to those skilled in the art, the claimed invention may include variations of the specific and preferred embodiments described herein. Many of the materials and structures described herein may be replaced by other materials and structures without departing from the spirit of the present invention. It should be understood that the various theories as to why the present invention works are not intended to be limiting.

Claims

1. A multi-functional phototherapy mask, characterized in that, Comprising: A first housing, a second housing, a first flexible OLED light source, a driving device, and a fixing device; Wherein the first housing covers at least a part of the human cheek area; The second housing covers at least a part of the human mouth and / or nose area; The flexible OLED light source comprises at least one OLED device; The first flexible OLED light source has at least one light-emitting surface, which faces the human face side and can cover at least a part of the human cheek; The first flexible OLED light source is arranged on the first housing, and the first flexible OLED light source emits light with a peak wavelength in the range of 600 - 1000 nm; The flexible OLED light source is electrically connected to the driving device; The fixing device is arranged on the first housing and / or the second housing.

2. The phototherapy mask according to claim 1, characterized in that, Wherein the OLED device is a bottom-emitting device, a top-emitting device, or a double-sided light-emitting device.

3. The phototherapy mask according to claim 1, characterized in that, Wherein the OLED device is a single-layer device or a stacked device.

4. The phototherapy mask according to claim 1, characterized in that, Wherein the first flexible OLED light source further comprises a second light-emitting surface, which emits light towards the side away from the human face.

5. The phototherapy mask according to claim 1, characterized in that, Further comprising a second flexible OLED light source, the second flexible OLED light source comprises at least one light-emitting surface, and at least one of the light-emitting surfaces emits light towards the side away from the human face.

6. The phototherapy mask according to claim 5, characterized in that, Wherein the second flexible OLED light source comprises at least two OLED devices, and the two OLED devices can emit light of different wavelengths.

7. The phototherapy mask according to claim 5, characterized in that, Wherein the second flexible OLED light source is a full-color OLED display screen.

8. The phototherapy mask according to claim 1, characterized in that, Wherein the material of the first housing is selected from leather, cotton, linen, silk, silica gel, non-woven fabric, plastic, or a combination thereof.

9. The phototherapy mask according to claim 1, characterized in that, Wherein the material of the second housing comprises cotton, linen, silk, non-woven fabric, or a combination thereof.

10. The phototherapy mask according to claim 1, characterized in that, Wherein the second housing further comprises a filtering material.

11. The phototherapy mask according to claim 1, characterized in that, Wherein the first housing and the second housing can be connected by a fixed connection method or a detachable connection structure.

12. The phototherapy mask according to claim 1, characterized in that, Wherein the second housing can further cover at least a part of the human cheek area.

13. The phototherapy mask according to claim 1, characterized in that, Wherein the second housing is a common mask.

14. The phototherapy mask according to any one of claims 1-13, characterized in that, Wherein the second housing is disposable or detachable.

15. The phototherapy mask according to claim 1, characterized in that, Wherein the driving device comprises any one or more of the following components: a power source, a charging device, a Bluetooth communication device, a chip, a lead, a circuit board, a switch.

16. The phototherapy mask according to claim 15, characterized in that, Wherein the power source comprises a battery.

17. The phototherapy mask according to claim 1, characterized in that,Wherein the driving device can be wirelessly connected to an external electronic device.

18. The phototherapy mask according to claim 17, characterized in that, Wherein the external electronic device further comprises an application program, and the external electronic device can drive or control the flexible OLED light source through the application program.

19. The phototherapy mask according to claim 1, characterized in that, Wherein the fixing device is selected from straps, ear hooks, elastic bands, buttons, zippers, Velcro, or a combination thereof.

20. The phototherapy mask according to claim 1, characterized in that, Further comprising a skin-friendly layer, wherein the skin-friendly layer is arranged on the light-emitting surface of the OLED light source facing the human face side.

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