Phototherapy device and preparation method thereof

Abstract

The invention discloses a phototherapy device and a preparation method thereof. The phototherapy device comprises at least two flexible OLED light-emitting panels, a shell and a driving device. The shell is directly or indirectly manufactured through 3D printing according to three-dimensional digital information of a body part to be used; the at least two flexible OLED light-emitting panels can emit light with two peak wavelengths; the driving device provides direct current for the flexible OLED light-emitting panel. The shell of the phototherapy device can be perfectly attached to the body part to be used, and the phototherapy device is light, thin, fit, comfortable to wear, not prone to light leakage and capable of fully utilizing the light emitting efficiency; the OLED light-emitting panel can emit two kinds of light, and the dual treatment effect is achieved; direct-current power supply is lower in power consumption, higher in efficiency, better in treatment effect and convenient to operate. In addition, the invention also discloses a preparation method of the phototherapy device.

Description

Technical Field

[0001] The present invention relates to a phototherapy device and a method for preparing the same, and more particularly to a phototherapy device prepared by 3D printing technology based on three-dimensional digital information of a user's body part to be used. Background Art

[0002] In the mid-to-late 20th century, technologies such as low light laser treatment and photobiomodulation (PBM) appeared, both of which used light as a means of treating diseases in the medical field (Michael R. Hamblin, Ying-ying Huang, Handbook of Photomedicine, CRC Press). In recent years, many studies have shown that red light to near-infrared light can help promote the regeneration of tissues such as collagen and skin cells, and can be used in anti-wrinkle beauty, promoting wound healing, removing spots and scars, and other fields (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). With the rapid development of micro-light therapy and photobiomodulation technology, more and more phototherapy products have emerged, especially wearable phototherapy products, such as phototherapy masks, phototherapy hair growth caps, phototherapy shaping clothing, eye phototherapy devices, etc., which have become the ideal home beauty, body or health care products for more and more people.

[0003] Most of the phototherapy products on the market currently use LED as the light source. LED is a high-intensity point light source, which is usually accompanied by heat. Therefore, LED light sources generally integrate heat dissipation devices to remove heat energy, and these LEDs must be arranged at a certain distance when used in an array to facilitate heat dissipation. This leads to the disadvantages of LED phototherapy products being heavy, uneven in light emission, and difficult to assemble and maintain. One type is such as Figure 4 The flexible mask shown here uses LED as a light source and can be bent in one dimension. However, it is obvious that in addition to the disadvantages of LED products mentioned above, this type of mask does not fit the face well, which wastes the luminous efficiency and easily causes light to leak from around the eyes, making the entire face look red, which is extremely unsightly. At the same time, the leaked red light also affects vision.

[0004] CN116236702A discloses a photon skin rejuvenation device and method for assisting in the application of gel, wherein the mask used is a 3D scanner that collects the patient's facial features for modeling and 3D printing. However, the application uses intense pulsed light, and the application uses the mask's own weight to squeeze the gel applied between the face and the mask to a uniform thickness, so the 3D mask must be made of hard material. The mask is also provided with a fitting cavity, a connecting end face, a through hole, various annular grooves, an inflatable connecting hole, an air bag, a cleaning hole, etc. When used, it needs to be matched with a coating device, and must be used with cold gel. The function of the mask is to assist medical staff in achieving rapid and uniform coating, cleaning of cold gel, and facial cleaning or massage. The design is quite complicated, and the use steps are cumbersome. The weight of the hard mask will also cause problems such as discomfort when wearing and inability to move freely during use.

[0005] OLED is a surface light source, a cold light source, not dazzling, and thin and light, making it very easy to integrate into a flexible substrate, making it an ideal light source choice for wearable applications. Therefore, phototherapy products that use OLED as a light source have broad market prospects and have received widespread attention.

[0006] CN211884990U discloses a phototherapy skin care device based on a flexible AC planar electroluminescent device, the light source of which is a special planar electroluminescent device, including a substrate, an electrode layer, a light-emitting layer and an encapsulation layer arranged in sequence from bottom to top, and multiple electrodes are arranged on the substrate at intervals, that is, its cathode and anode are on the same plane. Although it mentions an OLED light source, the power supply connected to the planar electroluminescent device of this phototherapy skin care device must be an AC power supply. Since the OLED device architecture naturally has parasitic capacitance, the parasitic capacitance must be fully charged with AC power before the OLED device itself can be powered, which reduces efficiency. In addition, the electroluminescent device needs to be connected to an external AC power supply through a wire, which has poor portability and cannot be used without an AC power supply.

[0007] Therefore, how to prepare a phototherapy product with excellent phototherapy effect, high phototherapy efficiency, perfect fit with human body parts, comfortable wearing and easy to use is a challenge that needs to be focused on. Summary of the invention

[0008] The present invention aims to provide a phototherapy device and a preparation method thereof to solve at least some of the above problems. The phototherapy device comprises at least two flexible OLED light-emitting panels, a shell and a driving device. The shell is directly made by 3D printing according to the three-dimensional digital information of the body part to be used, or is made indirectly by using a mold obtained by 3D printing according to the three-dimensional digital information of the body part to be used; at least two flexible OLED light-emitting panels are integrated on the shell, which can emit light of two peak wavelengths to treat human skin; the driving device provides direct current to the flexible OLED light-emitting panels. The shell of the phototherapy device is customized according to the contour of the user's body part to be used, can fit perfectly with the body part to be used, is thin and fit, and is comfortable to wear. Due to the high degree of fit between the shell and the use part, it is not easy to leak light, can make full use of the luminous efficiency, and can make the light intensity of the skin more uniform; the OLED light-emitting panel has the advantages of a surface light source and a cold light source, emits light uniformly, is not easy to heat up, and can emit two kinds of light, deep red and near infrared, which can achieve the effect of dual treatment; the direct current power supply has lower power consumption, higher efficiency, better treatment effect, and is easy to operate. In addition, a preparation method of the phototherapy device is disclosed.

[0009] According to one embodiment of the present invention, a phototherapy device is disclosed, comprising:

[0010] At least two flexible OLED light-emitting panels, a housing and a driving device;

[0011] The at least two flexible OLED light-emitting panels each include a light-emitting surface, and the light-emitting surface faces the body part to be used;

[0012] The at least two flexible OLED light-emitting panels emit light having at least two peak wavelengths, wherein the first peak wavelength is between 600-750 nm and the second peak wavelength is between 751-1400 nm;

[0013] The shell is directly made by 3D printing according to the three-dimensional digital information of the body part to be used, or is indirectly made by using a mold obtained by 3D printing according to the three-dimensional digital information of the body part to be used;

[0014] The at least two flexible OLED light-emitting panels are arranged on the housing;

[0015] The driving device is electrically connected to the flexible OLED light-emitting panel and provides direct current to the flexible OLED light-emitting panel.

[0016] In this embodiment, "the at least two flexible OLED light-emitting panels emit light containing at least two peak wavelengths" is intended to mean that it may include the following situations: each of the flexible OLED light-emitting panels can simultaneously emit light containing at least two peak wavelengths, or at least one flexible OLED light-emitting panel only emits light containing one peak wavelength, and the other flexible OLED light-emitting panel emits light containing at least another peak wavelength, or both of the above situations exist. For example, when the phototherapy device includes two flexible OLED light-emitting panels, each flexible OLED light-emitting panel simultaneously emits light with two peak wavelengths; or one flexible OLED light-emitting panel simultaneously emits light with two peak wavelengths, and the other flexible OLED light-emitting panel emits light with a peak wavelength of 600-750nm or 751-1400nm; or one flexible OLED light-emitting panel emits light with a peak wavelength of 600-750nm, and the other flexible OLED light-emitting panel emits light with a peak wavelength of 751-1400nm.

[0017] According to an embodiment of the present invention, the at least two flexible OLED light-emitting panels can be driven independently by the driving device.

[0018] According to an embodiment of the present invention, at least one of the at least two flexible OLED light-emitting panels emits light having at least two peak wavelengths.

[0019] According to one embodiment of the present invention, the first peak wavelength is between 630-750 nm.

[0020] According to one embodiment of the present invention, the first peak wavelength is between 650-750 nm.

[0021] According to one embodiment of the present invention, the second peak wavelength is between 751-1000 nm.

[0022] According to one embodiment of the present invention, the second peak wavelength is between 751-970 nm.

[0023] According to one embodiment of the present invention, the shell is directly manufactured by 3D printing according to the three-dimensional digital information of the body part to be used.

[0024] According to one embodiment of the present invention, the 3D printed material comprises plastic, gypsum material, metal, ceramic, rubber, or a combination thereof.

[0025] According to one embodiment of the present invention, the 3D printed material comprises plastic or metal.

[0026] According to one embodiment of the present invention, the 3D printed material includes nylon material, aluminum material, titanium alloy, or stainless steel.

[0027] According to one embodiment of the present invention, the shell is made by coating, embossing or casting using a mold obtained by 3D printing according to the three-dimensional digital information of the body part to be used.

[0028] According to an embodiment of the present invention, the thickness of the shell is less than 5 mm.

[0029] According to an embodiment of the present invention, the thickness of the shell is less than 3 mm.

[0030] According to an embodiment of the present invention, the shell is a soft film.

[0031] According to one embodiment of the present invention, the flexible OLED light-emitting panel is arranged on a side of the housing close to the human body, and the phototherapy device comprises a skin-friendly layer, and the skin-friendly layer is arranged on the light-emitting surface of the flexible OLED light-emitting panel.

[0032] According to one embodiment of the present invention, the material of the skin-friendly layer is selected from medical silicone, cotton, linen, silk, or a combination thereof.

[0033] According to one embodiment of the present invention, the thickness of the skin-friendly layer is less than 5 mm.

[0034] According to one embodiment of the present invention, the thickness of the skin-friendly layer is less than 3 mm.

[0035] According to an embodiment of the present invention, the thickness of the skin-friendly layer is less than 1 mm.

[0036] According to an embodiment of the present invention, the flexible OLED light-emitting panel is arranged on a side of the housing away from the human body, and the housing is made of a transparent material.

[0037] According to an embodiment of the present invention, the flexible OLED light-emitting panel is arranged on a side of the housing away from the human body, and the housing is made of transparent medical silicone.

[0038] According to one embodiment of the present invention, the light therapy device comprises an outer protective layer, and the outer protective layer is arranged on the light emitting surface of the flexible OLED light emitting panel on a side away from the human body.

[0039] According to an embodiment of the present invention, the material of the outer protective layer is selected from flexible materials.

[0040] According to an embodiment of the present invention, the material of the outer protective layer is selected from opaque silicone, cotton, linen, silk, or a combination thereof.

[0041] According to one embodiment of the present invention, 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, wherein the power source comprises a battery.

[0042] According to one embodiment of the present invention, the battery is selected from any one or more of the following: thin film battery, micro battery, button battery, chemical battery, lithium battery, hydrogen battery.

[0043] According to an embodiment of the present invention, the driving device can be wirelessly connected to an external electronic device.

[0044] 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.

[0045] According to an embodiment of the present invention, the external electronic device further includes an application, and the external electronic device can control the switching and / or brightness adjustment of the flexible OLED light-emitting panel through the application.

[0046] According to one embodiment of the present invention, the body part to be used includes at least one of the face, neck, chest and legs.

[0047] According to one embodiment of the present invention, the body part to be used is the face.

[0048] According to one embodiment of the present invention, the light therapy device comprises a shading component, and the shading component is arranged on the light path of the light emitted by the light emitting panel toward the human eye.

[0049] According to an embodiment of the present invention, the material of the shading component is selected from a flexible light-proof material.

[0050] According to an embodiment of the present invention, the material of the shading component is selected from silicone, plastic, leather, sponge material, or a combination thereof.

[0051] According to an embodiment of the present invention, the light therapy device further comprises a fixing device.

[0052] According to one embodiment of the present invention, the fixing device is selected from the group consisting of a strap, an elastic band, a ring, a hook, a buckle, a Velcro, a medical tape and a combination thereof.

[0053] According to one embodiment of the present invention, a method for preparing a phototherapy device is disclosed, the method comprising the following steps:

[0054] Step 1. Obtain three-dimensional digital information of the body part to be used;

[0055] Step 2. directly manufacturing the shell through 3D printing according to the three-dimensional digital information obtained in step 1, or obtaining a mold through 3D printing according to the three-dimensional digital information obtained in step 1, and then indirectly manufacturing the shell using the mold;

[0056] Step 3. Integrate at least two of the flexible OLED light-emitting panels and a driving device on the housing obtained in step 2.

[0057] According to one embodiment of the present invention, step 1 includes opening an application program, and performing a 3D scan on a human body part through the application program to obtain three-dimensional digital information.

[0058] According to an embodiment of the present invention, the method of indirectly making the shell using the mold in step 2 comprises coating, stamping or casting.

[0059] According to an embodiment of the present invention, in step 2, the shell is manufactured by obtaining a mold through 3D printing according to the three-dimensional digital information of the body part to be used, and then applying a solution to the mold.

[0060] According to an embodiment of the present invention, in step 2, the shell is made by 3D printing a mold based on the three-dimensional digital information of the body part to be used, and then using the mold for embossing.

[0061] According to one embodiment of the present invention, in step 2, the shell is manufactured by obtaining a hollow mold through 3D printing according to the three-dimensional digital information of the body part to be used, and then pouring a solution into the hollow mold.

[0062] According to one embodiment of the present invention, the solution comprises medical liquid silicone or coagulation type facial mask liquid.

[0063] According to one embodiment of the present invention, the solution is medical liquid silicone.

[0064] According to one embodiment of the present invention, in step 2, the 3D printing material includes plastic, gypsum material, metal, ceramic, rubber, or a combination thereof.

[0065] According to one embodiment of the present invention, in step 2, the 3D printing material includes plastic or metal.

[0066] According to one embodiment of the present invention, in step 2, the 3D printing material includes nylon material, aluminum material, titanium alloy, or stainless steel.

[0067] According to an embodiment of the present invention, in step 3, the at least two flexible OLED light-emitting panels emit light having at least two peak wavelengths, wherein the first peak wavelength is between 600-750 nm and the second peak wavelength is between 751-1400 nm.

[0068] The present invention discloses a phototherapy device and a preparation method thereof. The phototherapy device comprises a shell, and at least two flexible OLED light-emitting panels and a driving device integrated on the shell. The shell is directly made by 3D printing according to the three-dimensional digital information of the body part to be used, or is indirectly made by obtaining a mold by 3D printing according to the three-dimensional digital information of the body part to be used, and then using the mold; at least two flexible OLED light-emitting panels are integrated on the shell, which can emit light with two wavelengths of peak wavelengths of 600-750nm and 751-1400nm, which can have different therapeutic effects on human skin, wherein the light emitted with a peak wavelength of 751-1400nm has higher heat and can assist phototherapy. If the shell is an opaque material, the OLED light-emitting panel is integrated on the side of the shell close to the human body, and its light-emitting surface faces the human skin, and a skin-friendly protective layer is provided between the OLED light-emitting panel and the human skin. If the shell is made of transparent material, the OLED light-emitting panel can be integrated on the side of the shell away from the human skin, and its light-emitting surface faces the human skin. An outer protective layer is set on the side of the OLED light-emitting panel away from the human body to help fix the OLED light-emitting panel, as well as to protect and decorate it. The phototherapy device can fit the user's body perfectly, is thin and fit, comfortable to wear, has high luminous efficiency, and can make the light intensity of all parts of the skin more uniform; the OLED light-emitting panel has the advantages of surface light source and cold light source; the DC power supply has lower power consumption, higher efficiency, better treatment effect, and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1a-1c It is a schematic diagram of the structure of a single-layer OLED device.

[0070] Figure 2 It is a schematic diagram of the structure of a stacked OLED device.

[0071] Figure 3a-3d It is a cross-sectional schematic diagram of an OLED light-emitting panel.

[0072] Figure 4 This is a real picture of the commercially available LED flexible mask.

[0073] Figure 5a-5c It is a schematic diagram of the structure of an OLED light-emitting panel.

[0074] Figure 6 It is a schematic diagram of the preparation process of the shell of the phototherapy device of the present invention.

[0075] Figure 7 It is a schematic diagram of the cross-sectional structure of the phototherapy device of the present invention.

[0076] Figure 8 It is another cross-sectional structural schematic diagram of the phototherapy device of the present invention. DETAILED DESCRIPTION

[0077] As used herein, "top" means farthest from the substrate, while "bottom" means closest to the substrate. In the case where a first layer is described as being "disposed on" a second layer, the first layer is disposed farther from the substrate. Conversely, in the case where a first layer is described as being "disposed under" a second layer, the first layer is disposed closer to the substrate. Unless it is specified that the first layer is "in contact with" the second layer, other layers may exist between the first and second layers. For example, the cathode may be described as being "disposed on" the anode even if various organic layers are present between the cathode and the anode.

[0078] 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-emitting), i.e., emitting light from the anode side, or top-emitting (top-emitting), i.e., emitting light from the cathode side, or a transparent device, i.e., emitting light from both the anode and the cathode.

[0079] 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, an encapsulation layer, and at least one anode contact and at least one cathode contact extending outside the encapsulation layer for external access.

[0080] In this context, the anode (layer) and cathode (layer) of the same "OLED device" are not in the same plane.

[0081] As used herein, the term "encapsulation layer" may be a thin film encapsulation with a thickness of less than 100 micrometers, which includes placing one or more thin films directly on the device, or may also be a cover glass adhered to a substrate.

[0082] 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 lines, resistors, capacitors, inductors, transistors, micro-electromechanical systems (MEMS), etc. The flexible substrate of the flexible printed circuit can be plastic, thin glass, thin metal foil coated with an insulating layer, fabric, leather, paper, etc. A flexible printed circuit board is generally less than 1 mm thick, and more preferably, less than 0.7 mm thick.

[0083] As used herein, the term "light extraction layer" may refer to a light diffusion film, or other microstructures with light extraction effect, or a thin film coating with light outcoupling effect. The light extraction layer may be disposed on the surface of the substrate of the OLED, or may be disposed at other suitable locations, 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, etc.

[0084] As used herein, the term "independent drive" means that the operating points of two or more light-emitting panels (or OLED devices) are controlled separately. 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 route and power each light-emitting panel (or OLED device) without affecting each other.

[0085] As used herein, the term "light emitting region" refers to the portion of the planar area where the anode, organic layer, and cathode overlap together, excluding light extraction effects.

[0086] As used herein, the term "light-emitting surface" refers to the side of a light source that emits light. For example, if the light source comprises a bottom-emitting OLED light-emitting panel, then the "light-emitting surface" includes the side of the substrate away from the anode. If it is a top-emitting device, then the "light-emitting surface" includes the side of the encapsulation layer away from the cathode.

[0087] 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 matching hole and electron transport layers between a pair of anodes and cathodes. Such a device having a single light-emitting layer (or multiple continuous light-emitting layers) and its matching transport layers is a "single-layer device".

[0088] As used herein, the term "stacked device" refers to a device structure having multiple light-emitting layers between a pair of anodes and cathodes, and each light-emitting layer has its own independent hole transport layer and electron transport layer. Each light-emitting layer and its matching hole transport layer and electron transport layer constitute a single light-emitting layer. These single light-emitting layers are connected by charge generation layers. A device having such multiple single light-emitting layers is called a "stacked device."

[0089] As used herein, the term "3D" or "three-dimensional" refers to a space system formed by adding a direction vector to a two-dimensional plane system. Three-dimensional information refers to the information of an object in the three dimensions of space, x, y and z. Three-dimensional scanning refers to the collection of three-dimensional information of an object or surface, which is generally scanned by laser or infrared light and converted into digital information. 3D printing refers to a technology that constructs objects by printing layer by layer based on digital model files using adhesive materials. The spatial information of an object or surface can be fully reproduced by first three-dimensional scanning and then 3D printing.

[0090] A typical single-layer OLED device 100 is shown in FIG. Figure 1a As shown. 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 emitting 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 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 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 the top emission device, the anode layer 101 is a material or a combination of materials with 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 the reflectivity is usually greater than 50%; preferably, the reflectivity is greater than 80%; more preferably, the reflectivity is greater than 90%. 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 ratio is not higher than 5%, and the commonly used is between 1% and 3%. The light-emitting layer 105 usually also includes at least one host material and at least one light-emitting material, while the electron blocking layer 104 and the hole blocking layer 106 are optional layers, and the capping layer 110 is not required in the bottom emission device. The electron transport layer 107 may be a single layer of Yb, LiQ or LiF, or may be formed by co-evaporation of two or more materials. Figure 1b Schematic diagram of the structure of a multicolor OLED device 130. When other layers remain unchanged, the light-emitting layer may include a light-emitting layer 1051 and a light-emitting layer 1052, wherein the peak wavelength of the light-emitting layer 1051 may be between 600-750nm (red light), and the peak wavelength of the light-emitting layer 1052 may be between 750-1400nm (near-infrared light). Note that the order of the two light-emitting layers may also be reversed, that is, the light-emitting layer 1051 emits near-infrared light, and the light-emitting layer 1052 emits red light. An OLED device with this structure can emit red light and near-infrared light at the same time. Figure 1c1 is a schematic diagram of the structure of a color-variable 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 600-750nm (red light), and the peak wavelength of the light-emitting layer 1055 can be between 751-1400nm (near-infrared light). At low current density, the exciton recombination zone is mainly close to the cathode side, that is, in the light-emitting layer 1053, and the OLED device 120 can emit red light at this time; when the injection is gradually increased and the voltage and current density are increased, the exciton recombination zone moves to the anode side and finally enters the near-infrared light-emitting layer 1055, and the OLED device 120 emits near-infrared light. Of course, the light-emitting layer 1053 can also emit near-infrared light, and the light-emitting layer 1055 can emit red light, and vice versa. The structure of the color-variable OLED device and the use of the adjustment layer may be specifically referred to the inventor's previous patent applications CN111081891A and CN111081892A.

[0091] A typical schematic diagram of the structure of a stacked OLED device 200 is shown in FIG. Figure 2 As 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. 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, and 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, for example, both emit red light with a peak wavelength between 600-750nm; 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 750-1400nm. In this case, the device 200 can emit red light and near-infrared light at the same time. The charge generation layer 203 is generally composed of an n-type material and a p-type material, and a buffer layer may be added, as described in patent application CN112687811A. If the stacked device is a top emission device, a capping layer (not shown) may be added on the cathode layer 205. Figure 2 The device shown is a 2-unit stacked device, and a third light-emitting unit and a second charge generation layer can be added to form a 3-unit stacked device. The preparation of single-layer and stacked OLED devices is well known in the industry and will not be described in detail here.

[0092] One type of light source that can be used in a phototherapy device is a flexible organic light emitting device (OLED). A cross-sectional schematic diagram of a flexible OLED light emitting panel is shown in FIG. Figure 3a-3d In. Figure 3a In the figure, 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 (but the contact electrodes 303 are exposed), and an adhesive structure 304 connects the pair of contact electrodes 303 to an external driving circuit. The substrate 301 is flexible, including but 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) that is previously coated on a supporting base plate in the form of a solution, and is used for device preparation after being cured and flattened. After the device preparation is completed, it is peeled off from the supporting base plate 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 it has a 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 it has a longer life at the same brightness, and because the thicker film layer is conducive to improving the production yield. The organic material in the OLED device 310 can be formed by thermal evaporation in a vacuum chamber, or it can be partially or completely formed using a solution method, including but not limited to ink jet printing, spin coating, organic vapor spray printing (OVJP), etc. The encapsulation layer 302 is a thin film encapsulation layer, and the thickness is usually more than 10μm, such as a single-layer inorganic layer, or a thin film organic and inorganic alternating multilayer structure, which is formed by plasma enhanced chemical vapor deposition (PECVD), atomic layer deposition (ALD), printing, spin coating, etc. The contact electrode 303 may include at least one anode contact and at least one cathode contact. The front cover film 305 can be added to the above-mentioned OLED light-emitting panel, such as Figure 3bAs 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 embodiment, the adhesive structure 304 can be an FPC frame, and the front cover film 305 can be a plastic film to provide mechanical support. A specific description of using an FPC board to drive an OLED light-emitting panel can be found in patent application US20190376650A1, which is incorporated by reference in its entirety and is not within the scope of the detailed description of the present invention. The front cover film 305 may 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 various forms described above. An additional thin film encapsulation layer 306 can be coated on one or both sides of the substrate 301, such as Figure 3c The front cover film may also be coated with an additional thin film encapsulation layer 306, but this is not shown in the figure. Figure 3d In the embodiment, the back cover film 307 is covered on the substrate 301. The back cover film 307 can be used for mechanical support and is usually a flexible film, such as a plastic such as 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-mentioned various forms. Such a flexible OLED light-emitting panel, when electrically connected to an external electric drive (regardless of whether it is in the on or off state), is a flexible OLED light source, which is one of the basic components of the light therapy product in the present invention.

[0093] The flexible OLED light-emitting panel (OLED light source) used in the phototherapy device can emit light with a peak wavelength between 600-1400nm, preferably red light and near-infrared light with a peak wavelength between 600-970nm. The light in this band has the effects of anti-wrinkle, skin regeneration, freckle removal, and even anti-inflammatory (such as styes and acne), wound healing, and scar reduction (Daniel Barolet, Semin Cutan Med Surg, 27: 227-238, 2008). The preparation of red light or near-infrared OLED devices is well known to people in the industry and will not be described here. In some phototherapy products that need to achieve multiple therapeutic effects, multiple different light bands can also be used for treatment at the same time, for example, using 600-750nm red light and deep red light to stimulate cell regeneration, and using 751-1400nm near-infrared light to promote wound healing, freckle removal, etc.

[0094] There are several ways to achieve light with multiple different wavelengths:

[0095] The first is to design a pixelated layout on the same OLED light-emitting panel and then drive each pixel independently, or to group the pixels and drive different groups independently. OLED light-emitting panels are flexible, that is, they use flexible substrates and thin film packaging. The pixels here usually have a light-emitting area of ​​millimeters, that is, the minimum size is greater than or equal to 1mm 2 , preferably greater than or equal to 5mm 2 .For example, Figure 5a A flexible OLED light-emitting panel 500 shown may include a flexible OLED substrate 501, on which a series of OLED devices 502 are prepared by graphics, and these devices share the same thin film encapsulation layer 503. At this time, each pixel is an OLED device, and the entire flexible OLED light-emitting panel is a light source. At this time, metal wiring can be arranged on the panel while preparing the anode or cathode to electrically connect each OLED device 502. The method of metal wiring is well known to people in the field and will not be repeated here. By controlling different OLED devices through a circuit control system, different devices can emit light of different colors, or the same device can work under different currents, thereby achieving multiple colors.

[0096] A variation of this scheme is Figure 5b The flexible OLED light-emitting panel 510 shown includes a flexible OLED substrate 501 and a series of OLED devices 502, but 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 electrically connected through an FPC circuit board, which greatly improves the conductivity and the possibility of circuit complexity. Similarly, through these electrical connections, a single or multiple OLED devices 502 can be driven independently. In the above two cases, if different colors of light are to be emitted, different device structures can be evaporated on different OLED devices using a metal mask, especially changing the material of the light-emitting layer; it can also be referred to as described in patent applications CN111081892A and CN111081891A, all devices use the same independent unit multi-light-emitting layer structure, and the color change is achieved by moving the composite area at different working points.

[0097] Another solution is to form an array of independent OLED light-emitting panels, such as Figure 5cAs shown, at this time, each OLED light-emitting panel includes an independent substrate 521, an OLED device 502 and an independent encapsulation layer 513. Each independent OLED light-emitting panel is also flexible. These independent OLED light-emitting panels can be cut from the same motherboard, for example, they all use the same independent unit multi-light-emitting layer structure, or they can be reassembled by selecting devices of different structures from different motherboards. The advantage of this solution is that the devices can be screened, the yield rate is improved, and the diversity of product colors is increased. Figure 5c The independent light-emitting panels shown can be arranged and combined according to needs through FPC or front and rear cover films to form a dot matrix physically connected to each other. For details, please refer to the method disclosed in CN208750423U, which is not the focus of the present invention and will not be repeated. Similarly, these panels can be independently controlled and given different working currents. The above-mentioned array arrangement can not only achieve multi-color light emission, but also realize partition control, such as controlling the phototherapy product as needed so that it only performs phototherapy on designated parts, or making the intensity or illumination duration of different areas different. This optional local illumination can further reduce power consumption and save energy.

[0098] The phototherapy device of the present invention is customized according to the user's body part to be used. For example, a head phototherapy device can be made by three-dimensional scanning of the user's head, a facial phototherapy device can be made by three-dimensional scanning of the user's face (front of the head), and an eye phototherapy device can be made by three-dimensional scanning of the user's eyes (including the forehead, nose bridge, cheekbones, etc.).

[0099] Some parts of the head or facial light therapy device can be hollowed out, such as eyes, nostrils, and mouth, as needed to enhance air permeability, and the user can do other things during treatment.

[0100] A shading component may also be provided around the eyes, and the shading component is provided on the light path of the light emitted by the light emitting panel to the human eye, and the material of the shading component is selected from a flexible light-proof material, and preferably, the material of the shading component is selected from silicone, plastic, leather, sponge material, or a combination thereof. The main function of the shading component is to prevent the light emitted by the light emitting panel from irradiating the eyes and thus affecting the line of sight. A suitable fixing device may also be provided on the phototherapy device as needed, such as a strap, elastic band, ring sleeve, hook, buckle, Velcro, medical tape, etc., so that the phototherapy device can be conveniently fixed to the eyes or face during use, and the phototherapy device and the eyes or face can fit closely.

[0101] The phototherapy device disclosed in the present invention comprises a housing, at least two flexible OLED light-emitting panels, and a driving device. The preparation method of the phototherapy device comprises the following steps: Figure 6 As shown:

[0102] 1. Obtain three-dimensional digital information of the body part to be used. The way to obtain digital information can be to directly three-dimensionally scan the body part to be used with a scanning device and / or software, or to three-dimensionally scan a model of the body part to be used. The three-dimensional scanning can generally be performed by using a laser or infrared light as a light source and using a receiver to calculate the spatial distance, and then converted into digital information. Three-dimensional scanning can be performed by a dedicated three-dimensional scanner, and can also be performed by smart mobile electronic devices such as mobile phones, tablets, and smart watches. In this case, an application can be installed on these electronic devices first, and the camera on the smart device, or infrared camera and other components with three-dimensional scanning functions can be opened through the application. After scanning, the information is stored in the application for future use. How to use three-dimensional scanning technology to obtain three-dimensional digital information is well known to people in the industry, and those skilled in the art can use it reasonably as needed. The body part to be used can be the head, face, eyes, neck, chest, legs and other areas, preferably the face.

[0103] 2. According to the obtained three-dimensional digital information, use a 3D printer to print it into a mold in a suitable ratio. The material for 3D printing can be plastic (such as nylon material), or it can be gypsum material, metal (such as aluminum material, titanium alloy, stainless steel, etc.), ceramic, rubber and other materials, preferably nylon material. The thickness of the printed shell is not more than 3mm, preferably not more than 1mm, to ensure that it is light and wearable. The printing ratio can be between 1:0.95 and 1:1.1, and can also be appropriately relaxed or tightened according to the user's requirements. The preferred printing ratio is 1:1, so that the printed shell can fit the body part more perfectly. How to use a 3D printer to print three-dimensional digital information into a mold is well known to people in the industry, and those skilled in the art can make reasonable adjustments as needed.

[0104] 3. The 3D printed mold is directly used as the shell, and the shell fits perfectly with the body part to be used, with a suitable proportion and no need for cutting. Another way is to use the mold obtained by 3D printing to indirectly make the shell, and the production method includes coating, stamping, casting, etc. For example, a solution is coated on the mold, and a shell is formed after solidification, or a hollow mold is obtained by 3D printing according to the three-dimensional digital information of the body part to be used, and then the solution is poured into the hollow mold to make the shell. The solution can be medical liquid silicone or a coagulation type mask liquid, wherein the coagulation type mask liquid is formed by mixing gypsum powder with other nutrients. The production method is well known to people in the industry, and those skilled in the art can choose a suitable method to make it according to their needs. The shell is formed after the solution is solidified. The shell made in this way can be a soft film, and the material of the soft film is medical silicone, or a coagulation type mask, preferably medical silicone. The thickness of the soft film is less than 5mm, preferably less than 3mm.

[0105] 4. Integrate at least two flexible OLED light-emitting panels and a driving device on the housing. Figure 7The phototherapy device 700 shown includes a shell 710, an OLED light-emitting panel 720 (the OLED light-emitting panel 720 is at least two light-emitting panels, which are not all drawn in this figure), and a driving device 730. The OLED light-emitting panel 720 has a light-emitting surface and emits light toward the human skin 750 (as shown by the arrow in the figure). The shell 710 here can be a transparent or opaque shell. If the shell is opaque, the OLED light-emitting panel 720 needs to be integrated between the shell and the human body. The OLED light-emitting panel emits light with at least two peak wavelengths, wherein the first peak wavelength is 600-750nm and the second peak wavelength is 751-1400nm; preferably, the first peak wavelength is 630-750nm and the second peak wavelength is 751-1000nm; more preferably, the first peak wavelength is 650-750nm and the second peak wavelength is 751-970nm. The OLED light-emitting panel is a flexible panel. As required, the phototherapy device 700 may also include more OLED light-emitting panels, each of which is electrically connected to the driving device 730. The electrical connection includes but is not limited to one or more of thin film metal, transparent conductive material, and FPC lead wire. The driving device 730 can independently drive each OLED light-emitting panel, or it can be driven in groups or regions, for example, the panels in the central area are one group, and the panels in the surrounding areas are another group, so that the required areas can be selectively phototreated to further save power consumption. The driving device 730 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 wire, a circuit board, a switch, etc., wherein 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 730 can also be wirelessly connected to an external electronic device through a Bluetooth communication device, and controlled by the external electronic device, such as a switch, brightness adjustment, and partition control. The external electronic device can be a smart phone, a smart watch, a tablet computer, a laptop computer, and the like. Furthermore, the external electronic device can also be controlled in conjunction with an application, which can be combined with the 3D scanning application. In order to increase comfort, a skin-friendly layer 740 can be added between the OLED light-emitting panel 720 and the human skin 750. The skin-friendly layer 740 is flexible and light-transmitting, such as medical silicone, cotton, linen, silk, etc., preferably medical silicone. The skin-friendly layer 740 can also adopt a hollow design to achieve a light-transmitting effect, such as loosely woven cotton, linen, silk, etc. The thickness of the skin-friendly layer is less than 5 mm; preferably, less than 3 mm; more preferably, less than 1 mm. The skin-friendly layer is light, comfortable and does not affect the phototherapy effect. Some decorative coatings can also be set on the side of the shell 710 away from the human body, such as spraying some colors, patterns, etc., to make the phototherapy device more beautiful.

[0106] If the housing is made of a transparent material, such as transparent medical silicone, the phototherapy device can also be Figure 8 As shown, the OLED light-emitting panel 820 is integrated on the side of the housing 810 away from the human skin 850 and connected to the driving device 830. Since the medical silicone itself has a skin-friendly protective effect, it can be directly applied to the human skin. An outer protective layer 860 can also be set on the side of the OLED light-emitting panel 820 away from the human body. The outer protective layer 860 can be any flexible material, such as opaque silicone, cotton, silk, linen, etc., which can protect the OLED light-emitting panel and also have a certain decorative effect on the outside.

[0107] The phototherapy device disclosed in the present invention can be applied to various parts of the human body, such as the head, face, eyes, chest, abdomen, legs, etc. The shell of the phototherapy device is customized according to the three-dimensional data information of the user's body part to be used, and can fit perfectly with the body part to be used. It is thin and fits comfortably. Since the shell fits the use part well, it is not easy to leak light, and the luminous efficiency can be fully utilized, and the light intensity of various parts of the skin can be made more uniform; the OLED light-emitting panel has the advantages of surface light source and cold light source, emits light evenly, is not easy to heat up, and has two light-emitting spectra of deep red and near-infrared, which can achieve the effect of dual treatment; DC power supply has lower power consumption, higher efficiency, better treatment effect, and easy operation, which has huge advantages over traditional phototherapy products.

[0108] It should be understood that the various embodiments described herein are only 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 embodiments and preferred embodiments described herein. Many of the materials and structures described herein may be replaced with other materials and structures without departing from the spirit of the present invention. It should be understood that the various theories about why the present invention works are not intended to be restrictive.

Claims

1. A phototherapy device, comprising: At least two flexible OLED light-emitting panels, a housing and a driving device; The at least two flexible OLED light-emitting panels each include a light-emitting surface, and the light-emitting surface faces the body part to be used; The at least two flexible OLED light-emitting panels emit light having at least two peak wavelengths, wherein: The first peak wavelength is between 600-750nm, and the second peak wavelength is between 751-1400nm; The shell is directly made by 3D printing according to the three-dimensional digital information of the body part to be used, or is indirectly made by using a mold obtained by 3D printing according to the three-dimensional digital information of the body part to be used; The at least two flexible OLED light-emitting panels are arranged on the housing; The driving device is electrically connected to the flexible OLED light-emitting panel and provides direct current to the flexible OLED light-emitting panel.

2. The light therapy device as described in claim 1, wherein the at least two flexible OLED light-emitting panels can be driven independently by the driving device.

3. The light therapy device of claim 1, wherein at least one of the at least two flexible OLED light-emitting panels emits light having at least two peak wavelengths.

4. The phototherapy device of claim 1 or 3, wherein the first peak wavelength is between 630 nm and 750 nm; Preferably, the first peak wavelength is between 650-750 nm.

5. The phototherapy device of claim 1 or 3, wherein the second peak wavelength is between 751 nm and 1000 nm; Preferably, the second peak wavelength is between 751-970 nm.

6. The light therapy device of claim 1, wherein the 3D printed material comprises plastic, plaster material, metal, ceramic, rubber, or a combination thereof; Preferably, the 3D printed material comprises plastic or metal; More preferably, the 3D printed material comprises nylon material, aluminum material, titanium alloy or stainless steel.

7. The phototherapy device as described in claim 1, wherein the thickness of the shell is less than 5 mm; preferably, the thickness of the shell is less than 3 mm.

8. The phototherapy device according to claim 1, wherein the flexible OLED light-emitting panel is arranged on a side of the housing close to the human body, and the phototherapy device comprises a skin-friendly layer, and the skin-friendly layer is arranged on the light-emitting surface of the flexible OLED light-emitting panel; Preferably, the material of the skin-friendly layer is selected from medical silicone, cotton, linen, silk, or a combination thereof.

9. The phototherapy device as claimed in claim 8, wherein the thickness of the skin-friendly layer is less than 5 mm; preferably, less than 3 mm; more preferably, less than 1 mm.

10. The phototherapy device as claimed in claim 1, wherein the flexible OLED light-emitting panel is arranged on a side of the shell away from the human body, and the shell is made of a transparent material; preferably, the shell is made of transparent medical silicone.

11. The light therapy device according to claim 10, comprising an outer protective layer, wherein the outer protective layer is arranged on a side of the light emitting surface of the flexible OLED light emitting panel away from the human body; Preferably, the material of the outer protective layer is selected from flexible materials; More preferably, the material of the outer protective layer is selected from opaque silicone, cotton, linen, silk, or a combination thereof.

12. The light therapy device according to claim 1, 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, wherein the power source comprises a battery; Preferably, the battery is selected from any one or more of the following: thin film battery, micro battery, button battery, chemical battery, lithium battery, hydrogen battery.

13. The light therapy device of claim 1, wherein the body part to be used comprises at least one of the face, neck, chest and legs; Preferably, the body part to be used is the face.

14. The light therapy device of claim 13, wherein: The phototherapy device comprises a light shielding component, which is arranged on the light path of the light emitted by the light emitting panel toward the human eye; Preferably, the material of the shading component is selected from a flexible light-proof material; More preferably, the material of the shading component is selected from silicone, plastic, leather, sponge material, or a combination thereof.

15. A method for preparing a phototherapy device according to any one of claims 1 to 14, the method comprising the following steps: Step 1. Obtain three-dimensional digital information of the body part to be used; Step 2. directly manufacturing the shell through 3D printing according to the three-dimensional digital information obtained in step 1, or obtaining a mold through 3D printing according to the three-dimensional digital information obtained in step 1, and then indirectly manufacturing the shell using the mold; Step 3. Integrate at least two of the flexible OLED light-emitting panels and a driving device on the housing obtained in step 2.

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