Wearable phototherapy device

Abstract

The invention discloses a wearable phototherapy device. The wearable phototherapy device comprises a shell, an OLED light-emitting panel, an electric driving device and at least one light extraction component, according to the wearable phototherapy device, particularly, the edge light of the OLED light-emitting panel can be guided to the side away from the to-be-treated part through the light extraction component, so that the edge light which is usually wasted can be reasonably utilized, the light utilization rate is increased, meanwhile, the attractive decoration effect is achieved, and the invention further discloses a phototherapy ornament.

Description

Technical Field

[0001] The present invention relates to the field of wearable phototherapy products, and in particular, to a wearable phototherapy device. The wearable phototherapy device at least includes a housing, an OLED light-emitting panel, an electric driving device, a light extraction component, and an ornament including the phototherapy device. Background Art

[0002] In the mid-late 20th century, technologies such as Low Light Laser Treatment and Photobiomodulation (PBM) emerged, both of which use light irradiation as a means of treating diseases and are applied in the medical field (Michael R. Hamblin, Ying-ying Huang, Handbook of Photomedicine, CRC Press). In recent years, a number of studies have shown that red light to near-infrared light irradiation 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, etc. (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 Low Light Laser Treatment and Photobiomodulation technologies, more and more phototherapy products have emerged, especially wearable phototherapy products. For example, phototherapy masks, phototherapy hair growth caps, phototherapy shaping clothes, eye phototherapy devices, etc. have become ideal home beauty, body shaping or health care products for more and more people.

[0003] The light source used in phototherapy products can emit light with a peak wavelength between 400 - 1400 nm. Preferably, it emits red light and near-infrared light with a peak wavelength between 600 - 970 nm. The light in this wavelength band has functions such as anti-wrinkle, skin regeneration, freckle removal, and even anti-inflammatory effects (such as for hordeolum, acne), wound healing, and scar fading (Daniel Barolet, Semin Cutan Med Surg, 27:227 - 238, 2008). The light source in phototherapy products can also emit blue light with a wavelength of 400 - 500 nm. The light in this wavelength band has the effects of sterilization and anti-inflammation, and can reduce the infection of wounds. For example, it can treat acne well. In some phototherapy products with multiple treatment effects, multiple lights with different wavelength bands are generally used for treatment at the same time. Most of the current phototherapy products on the market use LEDs that can emit different light colors as the light source. LEDs are high-intensity point light sources and usually generate 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 form for heat dissipation. This results in disadvantages such as the bulkiness, uneven light emission, and difficulty in assembly and maintenance of LED phototherapy products.

[0004] As a surface light source and a cold light source, OLED does not glare and has the characteristic of being thin and light, making it very easy to be integrated onto a flexible substrate, becoming an ideal light source choice in the field of phototherapy devices. Therefore, phototherapy products using OLED as the light source have broad market prospects and have received extensive attention.

[0005] In a previous application CN119524324A of the present inventor, a neck phototherapy device was mentioned. An OLED light-emitting panel is provided on the side facing the user, and a decorative component is provided on the side away from the user, including but not limited to one or more of a neck warmer, a scarf, a bow tie, a necklace, a neck collar, a necktie, a neck guard, a neck sleeve, natural or artificial jewelry, and artificial flower ornaments. The decorative component in this application does not include the light from the OLED light-emitting panel. In another previous patent CN217791756U of the present inventor, a light-emitting eye ornament was mentioned. An OLED light-emitting panel is used to emit light to form a pattern on the side away from the human eye skin. In one embodiment, another OLED light-emitting panel can also be integrated on the side facing the eye skin for phototherapy at the same time. Although light may be emitted on both sides, they are lights from different OLED light-emitting panels, that is, one OLED light-emitting panel is required for each side, which is different from the solution of the present invention that only uses the same panel to emit light to both sides simultaneously.

[0006] In existing light therapy devices, most of the light emitted from the edge surface of the device will be wasted or leaked out, which affects the aesthetics. As a wearable light therapy device, how to achieve treatment while enhancing the beauty of the entire device during wearing through itself is still of great significance when designing such light therapy products. Summary of the Invention

[0007] The invention aims to provide a wearable light therapy device. The light therapy device includes an OLED light-emitting panel. Since a light extraction component is arranged at a specific position, when the light therapy device is used for light therapy, the edge light of the light-emitting panel can be guided to the side away from the light therapy part, so that the usually wasted edge light can be reasonably utilized, and the utilization rate of light can be improved while achieving an aesthetic decoration effect.

[0008] According to an embodiment of the present invention, a wearable light therapy device is disclosed, which includes: a housing, at least one OLED light-emitting panel, an electric driving device, and at least one light extraction component;

[0009] At least a part of the housing is transparent or semi-transparent or hollowed out;

[0010] The at least one OLED light-emitting panel is arranged on the housing and has an original light-emitting surface that emits at least one light with a peak wavelength in the range of 400 - 1400 nm;

[0011] The at least one OLED light-emitting panel includes a substrate, and edge light is emitted from the edge surface of the substrate or the encapsulated OLED light-emitting panel;

[0012] At least a part of the edge light irradiates onto the light extraction component;

[0013] The light extraction component at least partially exports the edge light of the OLED light-emitting panel and emits it toward the side opposite to the original light-emitting surface;

[0014] The at least one OLED light-emitting panel is electrically connected to the electric driving device.

[0015] According to an embodiment of the present invention, a light therapy ornament is also disclosed, which includes the light therapy device as described in the foregoing embodiment.

[0016] The light therapy device disclosed by the present invention can treat the part to be used while guiding the edge light of the OLED light-emitting panel to the side away from the part to be treated, so that the usually wasted edge light can be reasonably utilized, and the utilization rate of light can be improved while achieving an aesthetic decoration effect. Brief Description of the Drawings

[0017] Figure 1a-1d It is a schematic diagram of the structure of a single-layer OLED device.

[0018] Figure 2 It is a schematic structural diagram of a stacked OLED device.

[0019] Figure 3a-3d It is a schematic cross-sectional view of the OLED light-emitting panel adopted in the present invention.

[0020] Figure 4a It is a schematic cross-sectional view of a wearable light therapy device of the present invention.

[0021] Figure 4b It is a schematic plan view of the wearable light therapy device of the present invention observed from the user's side.

[0022] Figure 4c-4e It is a schematic plan view of the wearable light therapy device of the present invention observed from the side opposite to the user (i.e., facing the user).

[0023] Figure 5a It is a schematic plan view of the OLED light-emitting panel adopted in the present invention.

[0024] Figure 5b It is a schematic plan view of the wearable light therapy device observed from the user's side when used as a neck light therapy product.

[0025] Figure 5c It is a schematic plan view of the wearable light therapy device observed from the side opposite to the user when used as a neck light therapy product.

[0026] Figure 6 It is a schematic cross-sectional view of another wearable light therapy device of the present invention.

[0027] Figure 7a-7b It is a schematic view of the wearable light therapy device when used as an eye mask. Detailed Embodiments

[0028] The technical solution of the present invention will be further described below through specific embodiments. Those skilled in the art should understand that the embodiments are only for helping to understand the present invention and should not be construed as specific limitations on the present invention.

[0029] The structure of a typical single-layer OLED device 100 is as Figure 1aAs shown in the figure. 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 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-emitting 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-emitting device, the anode layer 101 is a material or material combination with a high reflectivity, including but not limited to Ag, Ti, Cr, Pt, Ni, TiN, and combinations 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 proportion is not higher than 5%, and commonly used is between 1% - 3%. The emitting layer 105 usually further includes at least one host material and at least one emitting material, and the electron blocking layer 104 and the hole blocking layer 106 are optional layers, and generally do not require a capping layer 110 in a bottom-emitting 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 1b It is a schematic structural diagram of a multicolor OLED device 130. When other layers remain unchanged, the emitting layer can include an emitting layer 1051 and an emitting layer 1052. The peak wavelength of the emitting layer 1051 can be between 600 - 750 nm (emitting red light), and the peak wavelength of the emitting layer 1052 can be between 750 - 1400 nm (emitting near-infrared light). Note that the order of these two emitting layers can also be reversed, that is, the emitting layer 1051 emits near-infrared light and the emitting layer 1052 emits red light. Such an OLED device with this structure can emit red light and near-infrared light simultaneously.

[0030] Figure 1cSchematic 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 - 1400 nm (emitting near - infrared light). At low current densities, 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 - infrared light - emitting layer 1055. At this time, the OLED device 120 emits near - infrared light. Of course, it is also possible for the light - emitting layer 1053 to emit near - infrared light and the light - emitting layer 1055 to emit red light, and vice versa. For the structure of the color - changeable OLED device and the use of the adjustment layer, reference can be specifically made to the previous patent applications CN111081891A and CN111081892A of the present inventor. A down - conversion layer 111 can also be provided on the capping layer 110 of the OLED device 140, as Figure 1d shown. The down - conversion layer 111 contains a photoluminescent material, and its absorption spectrum overlaps with the emission spectrum of the light - emitting layer 105. For example, when the light - emitting layer 105 emits red light, the down - conversion layer 111 can absorb the red light and emit near - infrared or infrared light with a longer wavelength. The photoluminescent material contained in the down - conversion layer 111 includes but is not limited to quantum dot materials, perovskite materials, phosphor materials, organic light - emitting materials, etc. If the OLED device 140 is a bottom - emitting device, the down - conversion layer 111 can be provided under the anode 101, which is not shown in the figure. It should be noted that although Figures 1b to 1d the devices shown can emit multiple colors, they are only controlled by a pair of anode and cathode electrodes, and there is only one circuit loop between the two electrodes. Therefore, the emission of different colors is not independently controlled and cannot be adjusted relatively independently of each other. This is essentially different from the device structure shown in the present application. Nevertheless, any independent device in the present application can still adopt the Figure 1a-1d structure.

[0031] The structure 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 with a peak wavelength between 600 - 750 nm, and the second light-emitting unit 204 emits near-infrared light with a peak wavelength between 750 - 1400 nm. In this case, the device 200 can emit red light and near-infrared light simultaneously. The charge generation layer 203 generally includes an n-type material and a p-type material, and a buffer layer may also be further added. As described in the patent application CN112687811A, it is not the focus of the present invention and will not be elaborated here. 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 stacked device shown includes two light-emitting units. A third light-emitting unit and a second charge generation layer can be further added on this basis to form a stacked device including three light-emitting units. The preparation of single-layer and stacked OLED devices is well-known in the industry and will not be elaborated here. It should be noted that the charge generation layer in the stacked device is not electrically connected to the external contact electrode and thus is not independently controlled. Although there are also multiple OLED devices stacked in this application, the middle electrode is electrically connected to the external contact electrode, so the upper and lower two light-emitting units can be independently controlled, which is also essentially different from traditional stacked devices. Nevertheless, any independent device in this application can still adopt Figure 2 the stacked device structure shown.

[0032] A light source that can be used in the phototherapy device component of the present invention is an organic light-emitting device (OLED). The cross-sectional structure of an OLED light-emitting panel is as Figure 3a-3d shown. 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 can be rigid, such as glass, and preferably 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) previously coated on a support substrate in solution form, and after curing and planarization, it is used for device fabrication. After device fabrication 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 deposited by thermal evaporation in a vacuum chamber or partially or entirely formed using solution methods, including but not limited to ink jet printing, spin coating, organic vapor jet printing (OVJP), etc. The packaging layer 302 can be formed by covering the device with rigid glass using an adhesive, and the adhesive can be a material cured by UV. The packaging layer 302 can also be 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, which can be 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, 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 bonding structure 304. In another solution, the bonding 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 an 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 various forms described above. An additional thin film encapsulation 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 encapsulation layer 306, but it is not shown in the figure here. In Figure 3d , 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 thin 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 various forms described above. Such an OLED light-emitting panel is an OLED light source when electrically connected to an external electrical drive (regardless of whether it is in the on or off state) and is one of the basic components of the light therapy device of the present invention.

[0033] As used herein, "top" means the farthest from the substrate, and "bottom" means the 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 can be other layers between the first and second layers. For example, even though there are various organic layers between the cathode and the anode, the cathode can still be described as being "disposed" "on" the anode.

[0034] 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), i.e., emitting light from the anode side, or top-emitting (top emission), i.e., emitting light from the cathode side, or a transparent device, i.e., emitting light from both the anode and the cathode simultaneously. In this article, the anode (layer) and the cathode (layer) of the same "OLED device" are not in the same plane.

[0035] 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 encapsulation layer, and at least one anode contact and at least one cathode contact extending outside the encapsulation layer for external access.

[0036] As used herein, the term "encapsulation layer" may be a thin-film encapsulation with a thickness less than 100 microns, which includes directly disposing one or more thin films onto the device, or may also be a cover glass adhered to the substrate.

[0037] As used herein, the term "independently driven" means that the operating points of two or more OLED devices are separately controlled. Although these OLED devices may be connected to the same controller or power line, there may be circuitry to divide the driving paths and supply power to each OLED device without affecting each other. An electrode is "independently driven" if the electrode can be given a voltage or current by the connected backplane circuitry or external power supply and is not affected by the voltage or current on other electrodes.

[0038] As used herein, the term "light-emitting area" refers to the portion of the planar area where the anode, organic layer, and cathode coincide, excluding the light extraction effect.

[0039] 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 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. As used herein, the term "original light-emitting surface" is the surface from which the "light-emitting surface" emits light, to distinguish it from "edge light".

[0040] As used herein, the term "edge light" refers to the light emitted from the edge of the light source, which is different from the emission direction of the original light-emitting surface. For the OLED light-emitting panel in this application, it refers to the light emitted from the edge surface of the encapsulation of the OLED light-emitting panel or the edge surface of the substrate due to the optical waveguide effect. The edge surface of the substrate or the edge surface of the encapsulation forms a 90-degree angle with the "original light-emitting surface". If the edge of the substrate is chamfered, then the "edge surface" has a certain angle with the "original light-emitting surface". The same applies to the edge surface of the encapsulation. In short, "edge light" is emitted from the edge surface and forms a certain angle with the original light-emitting surface.

[0041] As used herein, the term "light extraction component" refers to a component that specifically extracts edge light and directs at least part of the outgoing direction to the side away from the original light-emitting surface, and is not an inherent element. The "light extraction component" can be a film layer with light extraction function, but this film layer is not coated on the surface of the OLED light-emitting surface, but on the edge of the OLED light-emitting surface. The light extraction component can also include a part of the substrate and / or the housing. For example, the part of the substrate and / or the housing close to or at the edge of the OLED is doped with scattering particles. At this time, the substrate doped with scattering particles is considered as the light extraction component; or the edge of the substrate is cut into an oblique angle and / or the edge surface has a certain roughness. At this time, the substrate with an oblique angle edge or the edge substrate with a rough surface is considered as the light extraction component. The light extraction component can also include a reflective layer. Usually, the reflective layer is arranged on the same side as the original light-emitting surface of the light extraction component and / or the side surface of the housing.

[0042] As used herein, the term "single-layer device" refers to a device that has a light-emitting layer (or multiple continuous light-emitting layers) and a single set of hole and electron transport layers that match it between a pair of anode and cathode. Such a device with a single light-emitting layer (or multiple continuous light-emitting layers) and its supporting transport layers is a "single-layer device".

[0043] As used herein, the term "stacked device" refers to a device structure that has 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 light-emitting unit. These light-emitting units are connected by a charge generation layer. A device with such multiple light-emitting units is a "stacked device".

[0044] According to an embodiment of the present invention, a wearable light therapy device is disclosed, including: a housing, at least one OLED light-emitting panel, an electric drive device, and at least one light extraction component;

[0045] At least a part of the housing is transparent or translucent or hollowed out;

[0046] The at least one OLED light-emitting panel is arranged on the housing and has an original light-emitting surface, emitting at least one light with a peak wavelength in the range of 400 - 1400 nm;

[0047] The at least one OLED light-emitting panel includes a substrate, and edge light is emitted from the edge surface of the substrate or the edge of the OLED light-emitting panel package;

[0048] The light extraction component at least partially coincides with the edge of the at least one OLED light-emitting panel;

[0049] The light extraction component extracts at least part of the edge light of the OLED light-emitting panel and emits it towards the side opposite to the original light-emitting surface;

[0050] The at least one OLED light-emitting panel is electrically connected to the electric driving device.

[0051] In this article, emitting towards the side opposite to the original light-emitting surface means emitting towards the side opposite to the user or the used part, that is, the side away from the user or the used part.

[0052] According to an embodiment of the present invention, the housing is flexible.

[0053] According to an embodiment of the present invention, the entire housing is made of a transparent or translucent material.

[0054] According to an embodiment of the present invention, the material of the transparent or translucent part of the housing is silicone or acrylic.

[0055] According to an embodiment of the present invention, the OLED light-emitting panel emits light with at least one peak wavelength in the range of 400 - 1000 nm.

[0056] According to an embodiment of the present invention, the OLED light-emitting panel emits light with at least two peak wavelengths, and the difference between the peak wavelengths is not less than 30 nm.

[0057] According to an embodiment of the present invention, the OLED light-emitting panel emits light with at least two peak wavelengths, and the difference between the peak wavelengths is not less than 50 nm.

[0058] According to an embodiment of the present invention, the OLED light-emitting panel is flexible.

[0059] According to an embodiment of the present invention, it includes a series of OLED light-emitting panels and a series of light extraction components, and the series of light extraction components at least partially overlap with the edges of each OLED light-emitting panel.

[0060] According to an embodiment of the present invention, the light extraction component partially overlaps with the edge of the encapsulation layer of the OLED light-emitting panel.

[0061] According to an embodiment of the present invention, the light extraction component covers the edge of the OLED light-emitting panel.

[0062] According to an embodiment of the present invention, the light extraction component includes one or a combination of the following means: doping nanoparticles in a macromolecular polymer, doping nanoparticles in the substrate of the OLED light-emitting panel, cutting the edge of the OLED light-emitting panel into a non-right angle, providing a reflective layer on the side facing the usage part, providing microstructures on the surface of the substrate of the OLED light-emitting panel or on the side surface of the substrate edge or on the surface of the transparent or semi-transparent area of the housing, and a down-conversion material.

[0063] According to an embodiment of the present invention, the light extraction component includes a macromolecular polymer having high water and oxygen barrier properties.

[0064] According to an embodiment of the present invention, the nanoparticles can be some materials with a high refractive index, including but not limited to TiO x , AlO x , ZrO and other metal oxides, or some metal nanoparticles, such as Au, Ag, Cu, Pt, etc.

[0065] According to an embodiment of the present invention, the nanoparticles can be doped in the housing or in the substrate of the OLED light-emitting panel.

[0066] According to an embodiment of the present invention, the light extraction component includes metal thin films such as Ag and Al.

[0067] According to an embodiment of the present invention, the light extraction component includes surface microstructures such as microlenses and microprisms, and / or includes down-conversion materials such as phosphors, quantum dots, organic light-emitting materials, and perovskite materials.

[0068] According to an embodiment of the present invention, the light extraction component includes a filter or a photochromic material.

[0069] According to an embodiment of the present invention, the reflective layer can be provided on the surface of the light extraction component or can be provided on both sides of the housing at the same time.

[0070] According to an embodiment of the present invention, the down-conversion material exists in the light extraction component and / or the substrate or the housing in a doped form or is provided in the form of a thin film on the surface of the substrate and / or the housing or is provided in the light-emitting area of the light extraction component.

[0071] According to an embodiment of the present invention, the edge light is extracted by the light extraction component and is emitted through the housing to the side away from the user to form various patterns.

[0072] According to an embodiment of the present invention, the edge light realizes a decorative effect by forming patterns on the housing or converting into light of multiple colors.

[0073] According to an embodiment of the present invention, the wearable light therapy device is used as any of the following decorations: mask, necklace, bracelet, brooch, forehead guard, hair ornament, etc.

[0074] According to an embodiment of the present invention, a light therapy ornament is disclosed, which comprises the light therapy device as described in any one of the foregoing embodiments.

[0075] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited thereto.

[0076] Figure 4aFig. 400 shows a cross-sectional schematic view of a wearable light therapy device, which includes a housing 401, at least one OLED light-emitting panel 402, a light extraction component 403, and an electric drive device 404. The housing 401 further includes a non-light-emitting area 4010 and a light-emitting area 4011. The material of the housing can be rigid, such as metal alloy, plastic (such as acrylic), etc. Preferably, it is a bendable and moldable material, and more preferably, it is flexible. The material includes but is not limited to one or more of medical silicone, colorless polyimide, polyethylene terephthalate, polyethylene naphthalate, polymethyl methacrylate, natural fabric, chemical fiber, and non-woven fabric. The non-light-emitting area 4010 of the housing can be any one of the above materials and their combinations, but the light-emitting area 4011 of the housing must be a transparent or semi-transparent material, such as transparent acrylic, silicone, etc. Preferably, the non-light-emitting area 4010 and the light-emitting area 4011 of the housing can also be the same material, such as both being transparent acrylic or silicone, and the other side of the non-light-emitting area 4010 does not emit light itself because the OLED light-emitting panel 402 is integrated. More preferably, the non-light-emitting area 4010 and the light-emitting area 4011 of the housing are both the same transparent material, but surface treatment is performed on the interface between the non-light-emitting area 4010 and the OLED light-emitting panel 402, including but not limited to coloring, drawing, etc., so that the combined light color and form of the light-emitting area 4011 have a more decorative effect. The light-blocking area of the housing refers to the light that does not transmit in the direction of the light-emitting side 405 of the original light-emitting surface of the OLED light-emitting panel 402, and it can still be designed to transmit the light extracted by the light extraction component 403 of the OLED light-emitting panel 402 and emit it in the direction of the light-emitting side 406. Note that although the light-emitting area 4011 of the housing is a transparent material and in principle emits light from both sides, preferably, it does not emit light towards the use part and only emits light towards the part away from the use part. The light-emitting area 4011 of the housing can also be a hollow structure, that is, it has no obstruction to light itself. The OLED light-emitting panel 402 can be fixed to the housing in forms such as adhesion, snap-fastening, etc. Its substrate can be rigid, such as using a glass substrate, and preferably, it is flexible. The light emitted from the original light-emitting surface of the OLED light-emitting panel 402 is in the direction of the light-emitting side 405, that is, towards the use part side, and it emits at least one light with a peak wavelength between 400 - 1400 nm. Preferably, it is between 400 - 850 nm. More preferably, the OLED light-emitting panel can emit light with two peak wavelengths simultaneously or differently, and the difference between the peak wavelengths is at least 30 nm or more, preferably, 50 nm or more. The OLED light-emitting panel 402 includes a light-emitting area 4020 and a non-light-emitting area 4021. The light-emitting area 4020, that is, the light-emitting area, is the area jointly enclosed by the anode, the organic layer, and the cathode. The light emitted from it exits from the light-emitting side 405, and this light-emitting surface is the original light-emitting surface.The non-light-emitting region 4021 generally includes the electrode region, as well as the regions not commonly enclosed by the anode, the organic layer, and the cathode. It may also include a part of the substrate where no thin film is deposited. It should be noted that although no light is directly emitted from this non-light-emitting region, due to the optical waveguide effect, a part of the light will always be emitted from the side of the substrate and the package, and the angle between the emission direction and the original light-emitting surface is greater than 90 degrees. This part is called edge light. Generally, this part of the edge light is wasted because it does not face the direction to be used. However, in this application, the light extraction component 403 can change its optical path and make it emit toward the light-emitting side 406 opposite to the original light-emitting surface. Figure 4a The emission line diagram 407 shown by the dotted line in Figure 4a is a schematic diagram of light emission. A skin-friendly layer (not shown in the figure) can also be provided on the original light-emitting surface of the OLED light-emitting panel 402 to avoid symptoms such as skin allergies. The skin-friendly layer is flexible and light-transmissive, such as medical silicone, silk, cotton, linen, gauze, etc., and preferably medical silicone. In particular, in order to enable as much light emitted by the OLED light-emitting panel 402 to pass through the skin-friendly layer, the skin-friendly layer preferably uses a sparse weaving method or even a hollowing-out method to allow light to pass through. The skin-friendly layer can also include all or part of the front cover film 305 in the top-emitting device or the back cover film 307 in the bottom-emitting device. The skin-friendly layer can also be a part of the housing 401, or the entire housing is made of a skin-friendly material, such as medical silicone.

[0077] The coverage area of the light extraction component 403 should preferably cover all non-light-emitting regions 4021 to ensure that the edge light emitted at a large angle can be collected and reused. The light extraction component 403 can be a layer of light-scattering thin film. For example, nanoparticles are incorporated into a macromolecular polymer. The size of the nanoparticles is between 10 - 1000 nm, preferably between 100 - 100 nm. The nanoparticles can be some materials with a high refractive index, including but not limited to TiO x , AlO x, metal oxides such as ZrO, or some metal particles, such as Au, Ag, Cu, Pt, etc. Preferably, the incorporated macromolecular polymer can be used as an additional encapsulation layer after curing, that is, it has certain water and oxygen barrier properties. Since the light extraction component 403 can overlap with the edge of the encapsulation layer to a certain extent, that is, it will be disposed on the encapsulation layer and cover its edge, the light extraction component with water and oxygen barrier properties can also assist the encapsulation layer to further improve the lifespan of the OLED light-emitting panel. The above-mentioned nanoparticles can also be incorporated at least in the light-emitting area 4011 of the substrate and / or the housing, especially when the substrate is a flexible substrate such as PI, PET, PEN, etc., and / or the housing is made of a large polymer material such as silica gel, acrylic, etc. The light extraction component 403 can also include the treatment of the substrate edge. For example, the side edge of the substrate is cut at a certain angle so that the substrate side is not perpendicular to the light-emitting surface but at a certain angle, preferably 45 degrees. This treatment is more applicable to a hard substrate (such as glass) with a certain thickness. The light extraction component 403 can also include the surface treatment of at least one of the upper and lower surfaces (i.e., the light-emitting side 405 and the light-emitting side 406) of the housing in the light-emitting area 4011, including but not limited to setting microstructures on the surface, setting some nanoparticles on the surface, etc. The surface microstructure can be a series of microlenses, triangular prisms, or other structures that can form unevenness or matte treatment. Such microstructures can also be set on the surface of the substrate and the side surface of the substrate edge. These treatments all help to extract more light from the edge of the OLED light-emitting panel and transport it to the light-emitting area 4011 of the housing, and finally emit it along the direction of the light-emitting side 406. The surface treatment of the substrate side can also be combined with the chamfering of the substrate side at the same time. The light extraction component 403 can also include a reflective layer 4031 to help all the extracted edge light be reflected towards the light-emitting side 406. The reflective layer can be a metal thin film with a high reflectivity, such as Ag, Al, etc. In some embodiments, the light extraction component 403 can also include a down-conversion material, which can down-convert short-wavelength light into long-wavelength light. For example, the OLED light-emitting panel 402 includes blue light with a peak wavelength of 480 nm, and the down-conversion material can be used to convert it into green, yellow, red light or near-infrared light with a peak wavelength greater than 480 nm. The down-conversion materials include but are not limited to phosphors, quantum dots, organic light-emitting materials, and perovskite materials, etc. These down-conversion materials can exist in the form of doping in the light extraction component 403 and / or the substrate or the housing, or can be set on the surface of the substrate and / or the housing in the form of a thin film. The light extraction component 403 can also include a filter to change the color of the emitted light. The light extraction component 403 can also include some photochromic materials to achieve changes in color, transmittance, and reflectivity to achieve a special visual effect. It should be understood that the light extraction component is one or several means to increase the extraction effect of the edge light, and cannot be simply understood as a single component or device.Therefore, the light extraction component is present in one or several of the substrate, the encapsulation layer, and the housing. In particular, the light extraction arrangement can be directly integrated into the housing, for example, by treating the surface of the housing or incorporating nanoparticles into the transparent housing, which can reduce the manufacturing cost and improve the yield. Alternatively, the light extraction arrangement can also be pre-integrated on the substrate (especially at the edge of the substrate). Treating the edge of the substrate does not increase the process complexity too much and has little impact on the subsequent OLED manufacturing. This method can also obtain more functions and effects at low cost. The down-conversion material can be arranged at individual positions of the light extraction component 403, so that the light emitted from the light exit side 406 shows different colors, increasing the decorative effect. It should be noted that although... Figure 4a The boundary of the non-light-emitting area 4010 of the housing coincides with the non-light-emitting area 4021 on the OLED light-emitting panel 402, but in fact, it can vary according to the layout requirements. For example, the non-light-emitting area 4010 of the housing can only partially coincide with the non-light-emitting area 4021 on the OLED light-emitting panel 402.

[0078] The electric drive 404 is electrically connected to the OLED light-emitting panel 402. The electrical connection includes but is not limited to one or more of thin-film metal, transparent conductive material, and FPC leads. Of course, in order to improve the overall transmittance of the light therapy device, the electrical connection is preferably transparent. The electric drive device includes but is not limited to a power supply, a charging device (preferably a wireless charging device), a Bluetooth communication device, a chip, leads, a circuit board, a switch, and other devices. The power supply includes a battery, and the battery can be selected from one or more of thin-film batteries, micro batteries, button batteries, chemical batteries, lithium batteries, and hydrogen batteries. The electric drive device 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 smartphone, a smartwatch, a tablet computer, a laptop computer, or other devices. Further, the external electronic device can also be controlled in combination with an application program (APP).

[0079] Figure 4b Figure 410 shows a plan view of the wearable light therapy device 400 observed from the user's side. The area 4120 is the light-emitting area of the OLED light-emitting panel, and the periphery 411 can include the non-light-emitting area on the OLED light-emitting panel and part of the housing. Figure 4c Figure 420 shows a plan view of the wearable light therapy device 400 observed from the side opposite to the user (i.e., facing the user). The area 4220 is the non-light-emitting area on the housing, and the area 421 is the light-emitting area on the housing. This part of the light is emitted through... Figure 4arefracted by the light extraction component 403 therein. It should be noted that although large-angle light may be utilized at the edges of the OLED light-emitting panel, according to design requirements, only part of the edge light can be directed in the direction opposite to the original light-emitting surface, such as Figure 4d FIG. 430 is a schematic plan view of a wearable light therapy device observed from the side opposite to the user, where 4320 is the non-light-emitting area on the housing, and only two edges 431 are the light-emitting areas. Further, as Figure 4e shown in another schematic plan view 440 of a wearable light therapy device observed from the side opposite to the user, 4420 is the main non-light-emitting area of the housing, part of the edge 441 is the light-emitting area, and part 4421 of the edge is also the non-light-emitting area of the housing. Similarly, for Figure 4d the light-emitting area 431 shown, different colors can also be further displayed. For example, by doping different down-conversion materials in the light-emitting areas 431 on the left and right parts of the housing respectively, the blue light emitted from the original light-emitting surface can be down-converted to display green light on the left and red light on the right. The extraction and display of edge light depend on design requirements. For example, when the OLED light-emitting panel includes multiple OLED devices, light extraction components can be provided at some edges of the light-emitting panel. When the OLED light-emitting panel includes only one OLED device, light extraction components can be provided at all edges of the light-emitting panel, and even can be designed in cooperation with the patterns on the housing. Conversely, some pattern designs can also be made on the side of the housing far from the original light-emitting surface according to the light-emitting situation of the light extraction setting. It should be noted that although Figures 4b-4e shows a trapezoidal light-emitting area, a wearable light therapy device can adopt various different shapes of light-emitting area designs according to user needs and usage parts.

[0080] The wearable light therapy device in this application may also include multiple OLED light-emitting panels, such as Figure 5aThe schematic plan view 500 shown includes a housing 501, a series of OLED light-emitting panels 502, a series of light extraction components 503, and an electric drive device 504. The housing 501 further includes a series of non-light-emitting regions 5010 and a series of light-emitting regions 5011. Each OLED light-emitting panel 502 further includes a series of light-emitting regions 5020 and a series of non-light-emitting regions 5021. The light-emitting direction of the light-emitting regions 5020 is 505, that is, towards the side of the using part. The light emitted from the series of non-light-emitting regions 5021 passes through a series of light extraction components 503, and after the light path is redirected, it finally exits through the light-emitting region 5011 of the housing along the light-emitting direction 506, that is, towards the side away from the using part. The light extraction component 503 may further include a reflective layer 5031. The reflective layer 5031 may be provided on the surface of the light extraction component 503 or may be provided on both sides of the housing at the same time. The electric drive device 504 is electrically connected to the series of OLED light-emitting panels to control all the OLED light-emitting panels. Preferably, individual OLED light-emitting panels can be independently controlled. As Figure 5b The schematic plan view 510 shown is of a wearable light therapy device as observed from the user's side. It includes a housing 511. Region 5120 is the light-emitting region, and its light source is a series of OLED light-emitting panels. The light-emitting direction is towards the user as marked in the figure. Region 5111 is the light-emitting region on the housing, but its light-emitting direction is towards the side away from the user, as marked in the figure. In addition to the light-emitting region 5120 of the OLED light-emitting panel and the light-emitting region 5111 of the housing (the light-emitting directions at these two places are exactly opposite), the housing 511 may further include non-light-emitting regions 5112 that play roles such as support and fixation. The electric drive device 515 may be integrated in this region. Figure 5c The schematic plan view 520 shown is of the wearable light therapy device as observed from the side opposite to the user. It includes a housing 521. Region 5220 on the housing 521 is a non-light-emitting region, but there is outgoing light in the direction towards the user on this region. The light-emitting region on the housing 521 is 5211, that is, the light extracted from the edge of the OLED light-emitting panel and refracted and scattered by the light extraction component and emitted towards the side away from the user. The emission direction is as marked in the figure. There are also non-light-emitting regions 5212 on the housing 521 for functions such as support and fixation. As Figures 5b-5cThe wearable light therapy device shown can be used as a neck photoelectric therapy product. The integrated OLED light-emitting panel thereon can emit red light or deep red light towards the user's neck for light therapy. At the same time, the edge light of the neck photoelectric therapy product can be effectively utilized by the light extraction component and emitted towards the outside to play a decorative role. Such a photoelectric product can not only achieve the light therapy effect, but also be beautiful in appearance, comfortable to wear, and can be worn as an ornament, such as a mask, necklace, forehead guard, hair ornament, eye ornament, earring, bracelet, belt, which can make up for the deficiencies of current photoelectric therapy products.

[0081] A cross-sectional view of another wearable light therapy device 600 is as Figure 6 shown, which includes a housing 601, at least one OLED light-emitting panel 602, light-emitting sides 605 / 606, a light extraction component 603, reflective layers 6031 / 6032, and an electric drive device 604. The OLED light-emitting panel 602 includes a light-emitting area 6020 and a non-light-emitting area 6021. In some embodiments, the light extraction component can further utilize an optical waveguide, a scattering component, etc. to further expand its light-emitting area. It is different from the Figure 4a device shown in that a scattering component or an optical waveguide component, such as some nano-scattering particles, an optical waveguide component with a specific refractive index, etc., can be provided in the "non-light-emitting area" 6010 on the housing 601, and transparent or semi-transparent or hollow parts 6012 can be provided at corresponding positions according to design requirements. At this time, a part of the light emitted from the edge of the OLED light-emitting panel 602 can continue to be emitted from the light-emitting area 6011 along the optical path 607, and another part can be extracted by the light extraction component 403 and finally emitted along the optical path 608 through the transparent or semi-transparent or hollow part 6012 in the housing. A reflective layer 6032 can be provided in the non-light-emitting area 6010 of the housing 601 except for the transparent or semi-transparent or hollow part 6012 to ensure that the light in this part is not transmitted, or at least the area in the non-light-emitting area 6010 of the housing 601 except for the transparent or semi-transparent or hollow part 6012 is light-impermeable.

[0082] Figure 7a shows a schematic diagram of the use of a wearable light therapy device 700 that can be used as an eye mask. The device includes a housing 701, a non-light-emitting area 7010 and a light-emitting area 7011 (dark black part) on the housing 701. The light-emitting area 7011 is the edge light extracted from the OLED light-emitting panel (not shown in the figure) by the light extraction component (not shown in the figure) and conducted to the side far from the use part to emit light. In this design, more light can be introduced into the outer corner of the eye, creating a special makeup effect and increasing beauty. In Figure 7bIn another embodiment shown, the wearable phototherapy device 710 also includes a housing 711. There is a non-light-emitting area 7110 on the housing 711, a light-emitting area 7111 surrounding the edge of the housing 711, and some additional light-emitting areas 7112 in some partial areas of the non-light-emitting area 7110 through structures such as optical waveguides or scattering, and a pattern of small flowers is formed. As Figure 7a and 7b The wearable phototherapy devices shown can all be used as eye masks. While performing phototherapy on the eyes, some light-emitting edges and light-emitting patterns with decorative effects can also be seen from the outside, increasing the aesthetic property.

[0083] 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 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 as to why the present invention works are not intended to be limiting.

Claims

1. A wearable light therapy device, comprising: a housing, at least one OLED light-emitting panel, an electric driving device, and at least one light extraction component; At least a part of the housing is transparent or translucent or hollowed out; The at least one OLED light-emitting panel is disposed on the housing and has an original light-emitting surface and can emit at least one light with a peak wavelength in the range of 400 - 1400 nm; The at least one OLED light-emitting panel includes a substrate, and edge light is emitted from an edge surface of the substrate or the encapsulated OLED light-emitting panel; At least a part of the edge light irradiates onto the light extraction component; The light extraction component at least partially extracts the edge light of the OLED light-emitting panel and emits it towards a side opposite to the original light-emitting surface; The at least one OLED light-emitting panel is electrically connected to the electric driving device.

2. The wearable light therapy device according to claim 1, wherein the OLED light-emitting panel emits at least one light with a peak wavelength in the range of 400 - 1000 nm or emits at least two lights with peak wavelengths, and the difference between the peak wavelengths is not less than 30 nm; Preferably, the difference between the peak wavelengths is not less than 50 nm.

3. The wearable light therapy device according to claim 1, wherein the OLED light-emitting panel is flexible.

4. The wearable light therapy device according to claim 1, comprising a series of OLED light-emitting panels and a series of light extraction components, and at least a part of the series of light extraction components coincides with the edge of each OLED light-emitting panel.

5. The wearable light therapy device according to claim 1, wherein the light extraction component integrates one or more of the following means to achieve its function: doping nanoparticles in a macromolecular polymer, doping nanoparticles in the substrate of the OLED light-emitting panel, cutting the edge of the OLED light-emitting panel into a non-right angle, setting a reflective layer on the side facing the use part, microstructures, down-conversion materials, photochromic materials, doping nanoparticles in the housing, or setting an optical waveguide structure in the housing; Preferably, the light extraction component achieves its function by integrating one of the following means: doping nanoparticles in a macromolecular polymer, doping nanoparticles in the substrate of the OLED light-emitting panel, cutting the edge of the OLED light-emitting panel into a non-right angle, doping nanoparticles in the housing, or setting an optical waveguide structure in the housing.

6. The wearable light therapy device according to claim 5, wherein the light extraction component comprises one or more of the following materials: macromolecular polymers with high water and oxygen barrier properties, metal oxides, metal nanoparticles, metal thin films, microlenses, microprism surface microstructures, phosphors, quantum dots, organic light-emitting materials, perovskite down-conversion materials, and combinations thereof; Preferably, the light extraction component comprises one of the following materials: macromolecular polymers with high water and oxygen barrier properties, metal oxides, or metal nanoparticles.

7. The wearable light therapy device according to claim 1, wherein at least a part of the housing is flexible.

8. The wearable light therapy device according to claim 1, wherein the entire housing is made of transparent or translucent material; Preferably, the material of the transparent or semi-transparent part of the housing is silicone or acrylic.

9. The wearable light therapy device according to claim 1, wherein the wearable light therapy device is used as any one of the following decorations: mask, necklace, forehead guard, hair ornament, eye ornament, earring, bracelet, belt.

10. A light therapy ornament, comprising the light therapy device according to any one of claims 1-9.

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