Flexible composite substrate, phototherapy equipment and manufacturing method of phototherapy equipment

Abstract

The embodiment of the invention discloses a flexible composite substrate, phototherapy equipment and a manufacturing method of the phototherapy equipment. The flexible composite substrate comprises a flexible substrate used for shape memory; the at least one layer of first stress structure extends along the first direction, and the first stress structure is arranged on one side of the flexible substrate; the second stress structures extend in the second direction and are arranged on the sides, away from the flexible substrate, of the first stress structures, and the first direction intersects with the second direction; the orthographic projection of the second stress structure on the flexible substrate and the orthographic projection of the first stress structure on the flexible substrate are at least partially not overlapped; the stress direction of the first stress structure is opposite to that of the second stress structure, and the first stress structure and the second stress structure are used for forming ordered folds. According to the technical scheme provided by the embodiment of the invention, the problems that the phototherapy equipment is poor in fitness and cannot meet personalized customization are solved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of phototherapy technology, and in particular, to a flexible composite substrate, a phototherapy device, and a method for manufacturing the phototherapy device. Background Art

[0002] Light has a certain role in promoting the self-repair of human cells, promoting wound healing, and enhancing the body's immune ability. Existing phototherapy equipment mainly uses light sources such as LED and micro LED to act on human skin, which has the effect of photorejuvenation and reducing acne spots.

[0003] Most current phototherapy devices use point light sources embedded in a hard or flexible substrate, and use the hard or flexible substrate to shape the skin. However, point light sources have problems such as low light uniformity and severe heat generation of LED lamp beads. One-time molding of the hard substrate also makes it difficult to fit the contours of different groups.

[0004] Existing phototherapy equipment has poor fit and cannot meet the needs of personalized customization, which has become a technical problem that needs to be urgently solved in the industry. Summary of the invention

[0005] The embodiments of the present invention provide a flexible composite substrate, a phototherapy device and a method for manufacturing the phototherapy device, so as to solve the problem that the existing phototherapy devices have poor skin adhesion and cannot meet the requirements of personalized customization.

[0006] In order to achieve the above technical problems, the present invention adopts the following technical solutions:

[0007] An embodiment of the present invention provides a flexible composite substrate, including:

[0008] Flexible substrates for shape memory;

[0009] At least one layer of first stress structure extending along a first direction, the first stress structure being arranged on one side of the flexible substrate;

[0010] At least one layer of second stress structure extending along a second direction, the second stress structure being arranged on a side of the first stress structure away from the flexible substrate, and the first direction intersects the second direction;

[0011] The orthographic projection of the second stress structure on the flexible substrate at least partially does not overlap with the orthographic projection of the first stress structure on the flexible substrate;

[0012] The stress direction of the first stress structure is opposite to the stress direction of the second stress structure, and the first stress structure and the second stress structure are used to form ordered wrinkles.

[0013] Optionally, when the first stress structure has at least two layers, the stress gradient of each layer of the first stress structure changes;

[0014] When the second stress structure has at least two layers, the stress gradient of each layer of the second stress structure changes;

[0015] Optionally, the stress of the first stress structure close to the second stress structure is less than the stress of the first stress structure far from the second stress structure;

[0016] Optionally, the stress of the second stress structure close to the first stress structure is smaller than the stress of the second stress structure far from the first stress structure.

[0017] Optionally, the magnitude of the stress of the first stress structure and / or the second stress structure is adjusted by a deposition rate, or the magnitude of the stress of the first stress structure and / or the second stress structure is adjusted by a deposition temperature;

[0018] Optionally, the greater the deposition rate, the greater the stress;

[0019] Optionally, the higher the deposition temperature, the greater the stress.

[0020] Optionally, the first stress structure includes tensile stress, and the second stress structure includes compressive stress;

[0021] The tensile stress of the first stress structure adjacent to the second stress structure and the compressive stress of the second stress structure adjacent to the first stress structure are equal in magnitude and opposite in direction;

[0022] Optionally, the number of layers of the first stress structure is equal to the number of layers of the second stress structure;

[0023] Optionally, the first stress structure and the second stress structure each include three layers;

[0024] Optionally, the orthographic projections of the first stress structures located in different layers on the flexible substrate completely overlap;

[0025] Optionally, the orthographic projections of the second stress structures located in different layers on the flexible substrate completely overlap.

[0026] Optionally, the first stress structure includes at least one first conductive line, and the second stress structure includes at least one second conductive line;

[0027] The first conductive line extends along a first direction, and the second conductive line extends along a second direction;

[0028] The first conductive wire and the second conductive wire form a grid structure;

[0029] Optionally, the shape of the orthographic projection of the grid structure on the flexible substrate includes a circle, a square, a diamond or an irregular shape;

[0030] Optionally, the first conductive line and / or the second conductive line includes a straight line or a curved line.

[0031] Optionally, the angle between the first conductive line and the second conductive line is greater than or equal to 10° and less than or equal to 90°;

[0032] Optionally, the angle between the first conductive line and the second conductive line is equal to 45° or 90°;

[0033] Optionally, the angle between the first conductive line and the second conductive line is a chamfered structure;

[0034] Optionally, the material of the flexible substrate includes trifluoromethyl and a non-coplanar crosslinking agent physically crosslinked with polyimide molecular chains;

[0035] Optionally, the material of the first stress structure and / or the second stress structure includes at least one of a thermal control memory alloy material, a magnetic control memory metal material or an electro-shaped memory polymer material.

[0036] According to another aspect of the present invention, this embodiment provides a phototherapy device, comprising the flexible composite substrate proposed in any item of the first aspect;

[0037] A driving circuit is arranged on one side of the flexible composite substrate;

[0038] The light emitting device is arranged on a side of the driving circuit away from the flexible composite substrate;

[0039] The encapsulation layer is arranged on a side of the light emitting device away from the flexible composite substrate.

[0040] Optional light therapy equipment also includes:

[0041] The biocompatible layer is arranged on a side of the flexible composite substrate away from the light-emitting device;

[0042] The materials of the biocompatible layer include: polyparaxylene; or

[0043] The material of the biocompatible layer includes gelatin and chitosan-based composite materials, wherein metal nanoparticles are added as antibacterial agents, or lactic acid and acetylsalicylic acid are added as antibacterial agents; or,

[0044] The material of the biocompatible layer includes an antibacterial polymer such as poly(L-lactic acid) or chitosan; or

[0045] The material of the biocompatible layer includes an inert metal oxide.

[0046] According to another aspect of the present invention, this embodiment provides a method for manufacturing a phototherapy device, comprising:

[0047] providing a substrate;

[0048] forming a flexible composite substrate on one side of the base;

[0049] forming a driving circuit on a side of the flexible composite substrate away from the base;

[0050] forming a light emitting device on a side of the driving circuit away from the flexible composite substrate;

[0051] forming an encapsulation layer on a side of the light emitting device away from the flexible composite substrate;

[0052] The substrate is peeled off.

[0053] Optionally, a flexible composite substrate is formed on one side of the substrate, comprising:

[0054] A flexible substrate is formed on one side of the substrate, and the flexible substrate is used for shape memory;

[0055] At least one first stress structure is formed on a side of the flexible substrate away from the base, and the first stress structure extends along a first direction;

[0056] A second stress structure is formed on a side of the first stress structure away from the flexible substrate, the second stress structure extends along a second direction, and the first direction and the second direction intersect; an orthographic projection of the second stress structure on the flexible substrate and an orthographic projection of the first stress structure on the flexible substrate at least partially do not overlap; a stress direction of the first stress structure and a stress direction of the second stress structure are opposite, and the first stress structure and the second stress structure are used to form ordered wrinkles;

[0057] Optionally, after peeling off the substrate, the method further comprises:

[0058] A biocompatible layer is formed on a side of the flexible composite substrate away from the light emitting device.

[0059] The flexible composite substrate provided by the embodiment of the present invention arranges the first stress structure and the second stress structure on the flexible substrate so that the first stress structure and the second stress structure form a grid structure, and the stress direction of the first stress structure is opposite to the stress direction of the second stress structure, so that the first stress structure and the second stress structure of the flexible composite substrate form orderly wrinkles under the action of stress, which is convenient for improving the stretchability of the flexible composite substrate, improving the conformability, and facilitating the flexible composite substrate to meet personalized customization. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0061] Figure 1is a schematic structural diagram of a flexible composite substrate provided by an embodiment of the present invention;

[0062] Figure 2 A flexible composite substrate provided by an embodiment of the present invention Figure 1 Schematic diagram of the cross section along the AA' direction;

[0063] Figure 3 Another flexible composite substrate provided by the embodiment of the present invention is Figure 1 Schematic diagram of the cross section along the AA' direction;

[0064] Figure 4 is a structural schematic diagram of a phototherapy device provided by an embodiment of the present invention;

[0065] Figure 5 is a structural schematic diagram of a phototherapy device provided by an embodiment of the present invention;

[0066] Figure 6 is a flow chart of a method for manufacturing a phototherapy device provided by an embodiment of the present invention;

[0067] Figure 7 It is a structural schematic diagram of another method for manufacturing a phototherapy device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0068] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0069] Based on the above technical problems, this embodiment proposes the following solutions:

[0070] Figure 1 It is a schematic structural diagram of a flexible composite substrate provided by an embodiment of the present invention. Figure 2 A flexible composite substrate provided by an embodiment of the present invention Figure 1 Schematic diagram of the cross section along the AA' direction. Figure 1 and Figure 2The flexible composite substrate 10 provided by an embodiment of the present invention includes: a flexible substrate 1 for shape memory; at least one layer of first stress structure 2 extending along a first direction X, the first stress structure 2 being arranged on one side of the flexible substrate 1; at least one layer of second stress structure 3 extending along a second direction Y, the second stress structure 3 being arranged on a side of the first stress structure 2 away from the flexible substrate 1, the first direction X and the second direction Y intersecting; the orthographic projection of the second stress structure 3 on the flexible substrate 1 and the orthographic projection of the first stress structure 2 on the flexible substrate 1 at least partially do not overlap; the stress direction of the first stress structure 2 and the stress direction of the second stress structure 3 are opposite, and the first stress structure 2 and the second stress structure 3 are used to form ordered wrinkles.

[0071] Specifically, the flexible substrate 1 is a substrate material with flexibility and bendability. The flexible substrate 1 is made of thin and soft materials, such as polyimide (PI), polyester film (PET), etc. Compared with traditional rigid substrates, the flexible substrate 1 can adapt to various complex shapes and curved surfaces. For example, in a wearable phototherapy device, the flexible substrate 1 can fit the curve of the human body and provide a more comfortable wearing experience. The flexible substrate 1 is light in weight and thin in thickness, which helps to reduce the size and weight of the device. The flexible substrate 1 has good flexural resistance and fatigue resistance, and can maintain good performance after multiple bending and folding.

[0072] The flexible substrate 1 can be made of a material with shape memory function, so that the flexible substrate 1 is soft and stretchable, and has a shape memory function, so that it can be stretched from an initial shape to a target shape. After use, the initial shape can be remembered to restore the initial shape, thereby realizing the memory function of the flexible substrate 1.

[0073] The first stress structure 2 and the second stress structure 3 form a skeleton of the flexible composite substrate 10. The orthographic projection of the second stress structure 3 on the flexible substrate 1 does not overlap with the orthographic projection of the first stress structure 2 on the flexible substrate 1 at least partially, so that the skeleton formed by the first stress structure 2 and the second stress structure 3 is a mesh structure. The first stress structure 2 and the second stress structure 3 have different extension directions, which can increase the stretchability of the skeleton formed by the first stress structure 2 and the second stress structure 3.

[0074] By setting the stress direction of the first stress structure 2 to face the stress direction of the second stress structure 3, the first stress structure 2 and the second stress structure 3 form orderly wrinkles under the action of stress, which is convenient for improving the stretchability of the flexible composite substrate 10. In addition, the stress direction of the first stress structure 2 and the stress direction of the second stress structure 3 are opposite to each other, which can also avoid tearing between the film layers of the flexible composite substrate 10 and avoid warping of the flexible composite substrate 10.

[0075] The flexible composite substrate 10 provided in this embodiment is configured with a first stress structure 2 and a second stress structure 3 on a flexible substrate 1, so that the first stress structure 2 and the second stress structure 3 form a grid structure, and the stress direction of the first stress structure 2 is opposite to the stress direction of the second stress structure 3, so that the first stress structure 2 and the second stress structure 3 of the flexible composite substrate 10 form orderly wrinkles under the action of stress, which is convenient for improving the stretchability of the flexible composite substrate 10, improving the conformability, and making the flexible composite substrate 10 conform to personalized customization.

[0076] Optional, Figure 3 Another flexible composite substrate provided by the embodiment of the present invention is Figure 1 Schematic diagram of the cross section along the AA' direction. Figure 3 On the basis of the above embodiment, when the first stress structure 2 is at least two layers, the stress gradient of each layer of the first stress structure 2 changes; when the second stress structure 3 is at least two layers, the stress gradient of each layer of the second stress structure 3 changes.

[0077] Specifically, the stress gradient between each layer of the first stress structure 2 changes, for example, gradually increases or gradually decreases. The stress direction of each layer of the first stress structure 2 is the same. The stress difference between two adjacent layers of the first stress structure 2 can be equal or unequal. The stress gradient between each layer of the second stress structure 3 changes, for example, gradually increases or gradually decreases. The stress direction of each layer of the second stress structure 3 is the same. The stress difference between two adjacent layers of the second stress structure 3 can be equal or unequal. On the premise of ensuring that the stress direction of the first stress structure 2 is opposite to the stress direction of the second stress structure 3, the stress of the first stress structure 2 and the second stress structure 3 is set to a gradient change to prevent the flexible substrate 1 from bending with an excessively large radius of curvature due to a sudden change in stress, thereby causing damage to the film layer.

[0078] Optionally, based on the above embodiment, continue to refer to Figure 3 , the stress of the first stress structure 2 close to the second stress structure 3 is less than the stress of the first stress structure 2 far from the second stress structure 3. The stress of the second stress structure 3 close to the first stress structure 2 is less than the stress of the second stress structure 3 far from the first stress structure 2.

[0079] Specifically, such an arrangement enables the stress of the first stress structure 2 far from the second stress structure 3 to stretch the first stress structure 2 close to the second stress structure 3 toward the side far from the flexible substrate 1, which can provide the first stress structure 2 with stress for deformation and avoid the first stress structures 2 from peeling off. Such an arrangement enables the stress of the second stress structure 3 far from the first stress structure 2 to stretch the second stress structure 3 close to the first stress structure 2 toward the side close to the flexible substrate 1, which can provide the second stress structure 3 with stress for deformation and avoid the second stress structures 3 and the first stress structures 2 from peeling off.

[0080] Optional, continue to see Figure 3 On the basis of the above embodiment, the first stress structure 2 includes a tensile stress F1, and the second stress structure 3 includes a compressive stress F2; ​​the tensile stress F1 of the first stress structure 2 adjacent to the second stress structure 3 and the compressive stress F2 of the second stress structure 3 adjacent to the first stress structure 2 are equal in magnitude and opposite in direction.

[0081] Specifically, the tensile stress F1 of the first stress structure 2 stretches the first stress structure 2 in a direction away from the flexible substrate 1. The compressive stress F2 of the second stress structure 3 stretches the second stress structure 3 in a direction close to the flexible substrate 1. This arrangement can not only improve the stretchability of the first stress structure 2 and the second stress structure 3, but also better avoid peeling or warping between the first stress structure 2 and the second stress structure 3.

[0082] Optionally, based on the above embodiment, continue to refer to Figure 3 The stress of the first stress structure 2 and / or the second stress structure 3 is adjusted by the deposition rate, or the stress of the first stress structure 2 and / or the second stress structure 3 is adjusted by the deposition temperature. The greater the deposition rate, the greater the stress. The higher the deposition temperature, the greater the stress.

[0083] Specifically, the first stress structure 2 and the second stress structure 3 may include conductive materials, such as conductive metals. The stress magnitudes of the first stress structure 2 and the second stress structure 3 are related to the intrinsic material of the metal and deposition parameters.

[0084] For example, the higher the deposition rate, the greater the intrinsic tensile stress F1 of the metal. The higher the deposition temperature of the first stress structure 2, or the higher the deposition rate, the greater the tensile stress F1 of the first stress structure 2. The higher the deposition temperature of the second stress structure 3, or the higher the deposition rate, the greater the compressive stress F2 of the second stress structure 3.

[0085] Optional, continue to see Figure 3 , based on the above embodiment, the number of layers of the first stress structure 2 is equal to the number of layers of the second stress structure 3. Optionally, the first stress structure 2 and the second stress structure 3 each include three layers.

[0086] Specifically, the number of layers of the first stress structure 2 is equal to the number of layers of the second stress structure 3 , so that the tensile stress F1 provided by the first stress structure 2 and the compressive stress F2 provided by the second stress structure 3 are more easily balanced, thereby further improving the stretchability of the flexible composite substrate 10 .

[0087] Exemplarily, the first stress structure 2 sequentially includes a first layer of first stress structure 2, a second layer of first stress structure 2, and a third layer of first stress structure 2 away from the flexible substrate 1. The second stress structure 3 sequentially includes a first layer of second stress structure 3, a second layer of second stress structure 3, and a third layer of second stress structure 3 away from the flexible substrate 1.

[0088] The deposition rate of the first layer of the first stress structure 2 is less than the deposition rate of the second layer of the first stress structure 2 and less than the deposition rate of the third layer of the first stress structure 2. Accordingly, the tensile stress F1 of the first layer of the first stress structure 2 is less than

[0089] The tensile stress F1 of the second-layer first stress structure 2 is less than the tensile stress F1 of the third-layer first stress structure 2 .

[0090] The deposition temperature of the first layer of the second stress structure 3 is less than the deposition temperature of the second layer of the second stress structure 3 and less than the deposition temperature of the third layer of the second stress structure 3. Accordingly, the compressive stress F2 of the first layer of the second stress structure 3 is less than

[0091] The compressive stress F2 of the second-layer second stress structure 3 is less than the compressive stress F2 of the third-layer second stress structure 3 .

[0092] Optional, continue to see Figure 3 Based on the above embodiment, the orthographic projections of the first stress structures 2 located at different layers on the flexible substrate 1 completely overlap. Optionally, the orthographic projections of the second stress structures 3 located at different layers on the flexible substrate 1 completely overlap.

[0093] Specifically, such an arrangement can effectively reduce the coverage area of ​​the first stress structure 2 and the second stress structure 3, thereby increasing the opening rate of the grid structure and further improving the bending ability of the flexible composite substrate.

[0094] Optional, continue to see Figure 3 Based on the above embodiment, the first stress structure 2 includes at least one first conductive wire, and the second stress structure 3 includes at least one second conductive wire; the first conductive wire extends along the first direction X, and the second conductive wire extends along the second direction Y; the first conductive wire and the second conductive wire form a grid structure.

[0095] Specifically, the first conductive wire can provide tensile stress F1, and the second conductive wire can provide compressive stress F2. The first conductive wire and the second conductive wire form a grid structure, which can serve as a skeleton of the flexible composite substrate 10 and an electrode of a phototherapy device.

[0096] Optional, continue to see Figure 3 Based on the above embodiment, the shape of the orthographic projection of the grid structure on the flexible substrate 1 includes a circle, a square, a diamond or an irregular shape. Optionally, the first conductive line and / or the second conductive line includes a straight line or a curve.

[0097] Specifically, such a configuration facilitates the reasonable configuration of the shape of the grid structure according to actual bending requirements. When the first conductive line includes a straight line, the second conductive line may include a curve or a straight line. When the first conductive line includes a curve, the second conductive line may include a straight line or a curve. Such a configuration can further increase the flexibility of the process of manufacturing the first conductive line and the second conductive line, and further improve the stretchability of the flexible composite substrate.

[0098] Optional, continue to see Figure 3 , based on the above embodiment, the angle between the first conductive line and the second conductive line is greater than or equal to 10° and less than or equal to 90°. Optionally, the angle between the first conductive line and the second conductive line is equal to 30°, 45°, 60° or 90°. Optionally, the angle between the first conductive line and the second conductive line is a chamfered structure.

[0099] Specifically, such a configuration can not only improve the stretchability of the first conductive wire and the second conductive wire, but also improve the stress on the first conductive wire and the second conductive wire, thereby better avoiding the warping problem of the flexible composite substrate 10 caused by stress concentration and improving the flatness of the flexible composite substrate 10.

[0100] Optionally, based on the above embodiment, the material of the flexible substrate 1 includes trifluoromethyl and a non-coplanar crosslinking agent physically crosslinked with polyimide molecular chains.

[0101] Specifically, polyimide is used as the flexible substrate 1, trifluoromethyl, non-coplanar crosslinking agent and the like are introduced into the polyimide molecular chain to realize physical crosslinking of the polyimide molecular chain, and the shape memory function of the polyimide composite substrate is realized by combining the chemical crosslinking of the polyimide itself.

[0102] Optionally, based on the above embodiment, the material of the first stress structure 2 and / or the second stress structure 3 includes at least one of a thermal control memory alloy material, a magnetic control memory metal material or an electro-shaped memory polymer material.

[0103] In some embodiments, the first stress structure 2 and / or the second stress structure 3 may be made of a thermal memory alloy material. The first stress structure 2 and the second stress structure 3 may be made of one or more of Ni-Ti-based, Cu-based, Fe-based, Ag-based, Au-based, and Co-based alloy materials. For example, the first stress structure 2 may be made of Ni-Ti, Ni-Ti-Cu, Ni-Ti-Ag, etc., and the second stress structure 3 may be made of an Ag-based alloy material, such as Ag-Cd.

[0104] In some embodiments, the first stress structure 2 and / or the second stress structure 3 can be made of magnetically controlled memory metal materials, and the first stress structure 2 and the second stress structure 3 can be made of one or more of Ni-Mn-Ga, Fe-Pd, Ni-Mn-Al, Fe-Pt, La-Sr-Cu-O, Re-Cu, Ni-Mn-In, and Co-Ni-Ga, respectively.

[0105] In some embodiments, the first stress structure 2 and / or the second stress structure 3 may be made of an electro-shaped memory polymer material, which has electrical conductivity and electrical shape memory properties when powered on, such as epoxy-based, polystyrene-based, and polyurethane-based shape memory polymer composite materials with non-metal fillers such as carbon black, carbon nanotubes, graphene, and polypyrrole, and metal fillers such as gold, silver, copper, and nickel.

[0106] The flexible composite substrate 10 provided in this embodiment forms orderly wrinkles. The composite substrate after forming orderly wrinkles has stretchability, can achieve multi-dimensional bending, and can ensure the tight fit of the flexible phototherapy device. When the first stress structure 2 and / or the second stress structure 3 can be made of electro-shaped memory polymer material, the shape memory response of the flexible composite substrate 10 is realized by heating through power, and the high adaptability when not worn is restored.

[0107] Figure 4 FIG. 1 is a schematic diagram of a structure of a phototherapy device provided by an embodiment of the present invention. Figure 4 The phototherapy device 100 provided in this embodiment includes the flexible composite substrate 10 proposed in any of the above embodiments; the driving circuit 20 is arranged on one side of the flexible composite substrate 10; the light-emitting device 30 is arranged on the side of the driving circuit 20 away from the flexible composite substrate 10; and the encapsulation layer 40 is arranged on the side of the light-emitting device 30 away from the flexible composite substrate 10.

[0108] Specifically, the flexible composite substrate 10 has a shape memory function and can be stretched and multi-dimensionally bent. The driving circuit 20 is used to drive the light emitting device 30 according to the power signal, the data signal and the timing control signal. The light emitting device 30 emits light according to the driving signal of the driving circuit 20. The light emitting device 30 may include an organic light emitting diode (OLED). The encapsulation layer 40 is arranged on a side of the light emitting device 30 away from the flexible composite substrate 10. The encapsulation layer 40 is used to encapsulate the light emitting device 30, and can block the influence of water and oxygen on the light emitting device 30, so as to improve the service life of the light emitting device 30.

[0109] Optional, Figure 5 FIG. 1 is a schematic diagram of a structure of a phototherapy device provided by an embodiment of the present invention. Figure 5 The phototherapy device may further include: a biocompatible layer 50, which is arranged on the side of the flexible composite substrate 10 away from the light-emitting device 30; the material of the biocompatible layer 50 includes: polyparaxylene material; or, the material of the biocompatible layer 50 includes gelatin, chitosan-based composite materials, to which metal nanoparticles are added as antibacterial agents, or lactic acid and acetylsalicylic acid are added as antibacterial agents; or, the material of the biocompatible layer 50 includes an antibacterial polymer of polylactic acid or chitosan; or, the material of the biocompatible layer 50 includes an inert metal oxide; or, the material of the biocompatible layer 50 includes parylene.

[0110] Specifically, the biocompatibility layer 50 is used to improve the biocompatibility of the phototherapy device when it contacts the skin or the like.

[0111] In some embodiments, the biocompatible layer 50 may be made of polyparaxylene material and prepared by vacuum vapor deposition, wherein polyparaxylene is also called Parylene.

[0112] In some embodiments, the biocompatible layer 50 is made of a gelatin-chitosan based composite material, to which metal nanoparticles such as silver, copper, and zinc are added as antibacterial agents, or lactic acid and acetylsalicylic acid are added as antibacterial agents.

[0113] In some embodiments, the biocompatible coating is an antibacterial polymer layer made of materials such as poly(L-lactic acid) and chitosan, and can be prepared by an electrospinning method.

[0114] In some embodiments, the biocompatible layer 50 is made of inert metal oxides such as titanium and aluminum, and the preparation method may include physical vapor deposition, chemical vapor deposition, etc.

[0115] The phototherapy device provided in this embodiment can achieve multi-dimensional bending, has good mechanical properties, good temperature resistance, and is compatible with OLED mass production process. The phototherapy device forms controllable and orderly wrinkles by adopting a flexible composite substrate 10 with shape memory function and multi-dimensional bending, achieves stretchability, and avoids the process of transfer and re-transplantation. The phototherapy device provided in this embodiment is stretchable, which is convenient for personalized bending according to user needs, and can achieve initial state memory, and can restore the initial state after use.

[0116] Figure 6 It is a flow chart of a method for manufacturing a phototherapy device provided by an embodiment of the present invention. Figure 7 FIG. 1 is a schematic diagram of another method for manufacturing a phototherapy device provided by an embodiment of the present invention. Figure 4 , Figure 6 and Figure 7 This embodiment provides a method for manufacturing a phototherapy device, comprising:

[0117] S101 , providing a substrate 200 .

[0118] S102 , forming a flexible composite substrate 10 on one side of the base 200 .

[0119] S103 , forming a driving circuit 20 on a side of the flexible composite substrate 10 away from the base 200 .

[0120] S104 , forming a light emitting device 30 on a side of the driving circuit 20 away from the flexible composite substrate 10 .

[0121] S105 , forming an encapsulation layer 40 on a side of the light emitting device 30 away from the flexible composite substrate 10 .

[0122] S106 , peeling off the substrate 200 .

[0123] Specifically, the substrate 200 may be a rigid substrate, such as a glass substrate or a sapphire substrate. The electrodes of the light-emitting device 30 may be made of ultra-thin metal or flexible transparent conductive materials such as graphene. The light-emitting device 30 and the encapsulation layer 40 are prepared on the flexible composite substrate 10 proposed in any of the above embodiments. After the encapsulation layer 40 is manufactured, the flexible composite substrate 10 is peeled off from the substrate 200, and the flexible composite substrate 10 can be bent in multiple dimensions.

[0124] Optionally, based on the above embodiment, continue to combine Figure 4 , Figure 6 and Figure 7 , a flexible composite substrate 10 is formed on one side of the substrate 200, comprising:

[0125] A flexible substrate 1 is formed on one side of the base 200 , and the flexible substrate 1 is used for shape memory.

[0126] At least one first stress structure 2 is formed on a side of the flexible substrate 1 away from the base 200 , and the first stress structure 2 extends along the first direction X.

[0127] A second stress structure 3 is formed on a side of the first stress structure 2 away from the flexible substrate 1, and the second stress structure 3 extends along a second direction Y, and the first direction X intersects with the second direction Y. The orthographic projection of the second stress structure 3 on the flexible substrate 1 and the orthographic projection of the first stress structure 2 on the flexible substrate 1 at least partially do not overlap; the stress direction of the first stress structure 2 and the stress direction of the second stress structure 3 are opposite, and the first stress structure 2 and the second stress structure 3 are used to form orderly wrinkles.

[0128] Optionally, based on the above embodiment, continue to combine Figure 4 , Figure 6 and Figure 7 After the substrate 200 is peeled off, the method may further include: forming a biocompatible layer 50 on a side of the flexible composite substrate 10 away from the light emitting device 30 .

[0129] In order to ensure the biocompatibility of the phototherapy device, a biocompatible layer 50, such as a parylene coating, an antibacterial hydrogel coating, etc., needs to be deposited on the side of the flexible composite substrate 10 away from the light-emitting device 30.

[0130] In some embodiments, the biocompatible layer 50 is made of polyparaxylene and is prepared by vacuum vapor deposition.

[0131] In other embodiments, the biocompatible layer 50 is made of a gelatin-chitosan based composite material, to which metal nanoparticles such as silver, copper, and zinc are added as antibacterial agents, or lactic acid and acetylsalicylic acid are added as antibacterial agents.

[0132] In some other embodiments, the biocompatible layer 50 is an antibacterial polymer layer made of materials such as poly(L-lactic acid) and chitosan, and can be prepared by electrospinning.

[0133] In some other embodiments, the biocompatible layer 50 is made of inert metal oxides such as titanium and aluminum. The preparation method includes physical vapor deposition, chemical vapor deposition, and the like.

[0134] It should be noted that Figure 7 The case of an electro-deformation phototherapy device is exemplified, and the initial state of the phototherapy device may be a state with orderly wrinkles after peeling, without any limitation here.

[0135] The manufacturing method of the phototherapy device provided in this embodiment provides a substrate 200, and forms a flexible composite substrate 10 on one side of the substrate 200. A driving circuit 20 is formed on the side of the flexible composite substrate 10 away from the substrate 200. A light-emitting device 30 is formed on the side of the driving circuit 20 away from the flexible composite substrate 10. An encapsulation layer 40 is formed on the side of the light-emitting device 30 away from the flexible composite substrate 10. Finally, the substrate 200 is peeled off to obtain a phototherapy device. The phototherapy device manufactured by the manufacturing method of the phototherapy device provided in this embodiment can achieve multi-dimensional bending, has good mechanical properties, good temperature resistance, and is compatible with OLED mass production process. The phototherapy device manufactured by the manufacturing method of the phototherapy device provided in this embodiment can achieve multi-dimensional stretching, is convenient for personalized bending according to user needs, and can achieve initial state memory, and can restore the initial state after use.

[0136] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A flexible composite substrate, characterized in that: include: Flexible substrates for shape memory; At least one layer of first stress structure extending along a first direction, wherein the first stress structure is disposed on one side of the flexible substrate; at least one layer of second stress structure extending along a second direction, wherein the second stress structure is arranged on a side of the first stress structure away from the flexible substrate, and the first direction intersects the second direction; The orthographic projection of the second stress structure on the flexible substrate and the orthographic projection of the first stress structure on the flexible substrate at least partially do not overlap; The stress direction of the first stress structure is opposite to the stress direction of the second stress structure, and the first stress structure and the second stress structure are used to form ordered wrinkles.

2. The flexible composite substrate according to claim 1, characterized in that: When the first stress structure has at least two layers, the stress gradient of each layer of the first stress structure changes; When the second stress structure has at least two layers, the stress gradient of each layer of the second stress structure changes; Preferably, the stress of the first stress structure close to the second stress structure is smaller than the stress of the first stress structure far from the second stress structure; Preferably, the stress of the second stress structure close to the first stress structure is smaller than the stress of the second stress structure far from the first stress structure.

3. The flexible composite substrate according to claim 1, characterized in that: The magnitude of the stress of the first stress structure and / or the second stress structure is adjusted by a deposition rate, or the magnitude of the stress of the first stress structure and / or the second stress structure is adjusted by a deposition temperature; Preferably, the greater the deposition rate, the greater the stress; Preferably, the higher the deposition temperature, the greater the stress.

4. The flexible composite substrate according to claim 1, characterized in that: The first stress structure includes tensile stress, and the second stress structure includes compressive stress; The tensile stress of the first stress structure adjacent to the second stress structure and the compressive stress of the second stress structure adjacent to the first stress structure are equal in magnitude and opposite in direction; Preferably, the number of layers of the first stress structure is equal to the number of layers of the second stress structure; Preferably, the first stress structure and the second stress structure each include three layers; Preferably, the orthographic projections of the first stress structures located in different layers on the flexible substrate completely overlap; Preferably, the second stress structures located in different layers completely overlap each other in their orthographic projections on the flexible substrate.

5. The flexible composite substrate according to claim 1, characterized in that: The first stress structure includes at least one first conductive line, and the second stress structure includes at least one second conductive line; The first conductive line extends along the first direction, and the second conductive line extends along the second direction; The first conductive wire and the second conductive wire form a grid structure; Preferably, the shape of the orthographic projection of the grid structure on the flexible substrate includes a circle, a square, a diamond or an irregular shape; Preferably, the first conductive line and / or the second conductive line comprises a straight line or a curved line.

6. The flexible composite substrate according to claim 5, characterized in that: The angle between the first conductive line and the second conductive line is greater than or equal to 10° and less than or equal to 90°; Preferably, the angle between the first conductive line and the second conductive line is equal to 30°, 45°, 60° or 90°; Preferably, the angle between the first conductive line and the second conductive line is a chamfered structure; Preferably, the material of the flexible substrate includes trifluoromethyl and non-coplanar crosslinking agent physically crosslinked with polyimide molecular chains; Preferably, the material of the first stress structure and / or the second stress structure includes at least one of a thermal control memory alloy material, a magnetic control memory metal material or an electro-shaped memory polymer material.

7. A phototherapy device, characterized in that: A flexible composite substrate comprising any one of claims 1 to 6; A driving circuit is arranged on one side of the flexible composite substrate; A light emitting device, arranged on a side of the driving circuit away from the flexible composite substrate; The packaging layer is arranged on a side of the light emitting device away from the flexible composite substrate.

8. The phototherapy device according to claim 7, characterized in that: Also includes: A biocompatible layer is disposed on a side of the flexible composite substrate away from the light-emitting device; The materials of the biocompatible layer include: polyparaxylene material; or, The material of the biocompatible layer includes gelatin and chitosan-based composite materials, wherein metal nanoparticles are added as antibacterial agents, or lactic acid and acetylsalicylic acid are added as antibacterial agents; or, The material of the biocompatible layer includes an antibacterial polymer such as poly(L-lactic acid) or chitosan; or The material of the biocompatible layer includes inert metal oxide.

9. A method for manufacturing a phototherapy device, characterized in that: include: providing a substrate; forming a flexible composite substrate on one side of the base; forming a driving circuit on a side of the flexible composite substrate away from the base; forming a light emitting device on a side of the driving circuit away from the flexible composite substrate; forming an encapsulation layer on a side of the light emitting device away from the flexible composite substrate; The substrate is peeled off.

10. The method for manufacturing the phototherapy device according to claim 9, characterized in that: The flexible composite substrate is formed on one side of the substrate, comprising: forming a flexible substrate on one side of the base, wherein the flexible substrate is used for shape memory; At least one first stress structure is formed on a side of the flexible substrate away from the base, wherein the first stress structure extends along a first direction; A second stress structure is formed on a side of the first stress structure away from the flexible substrate, the second stress structure extends along a second direction, the first direction and the second direction intersect; the orthographic projection of the second stress structure on the flexible substrate and the orthographic projection of the first stress structure on the flexible substrate at least partially do not overlap; the stress direction of the first stress structure and the stress direction of the second stress structure are opposite, and the first stress structure and the second stress structure are used to form ordered wrinkles; Preferably, after peeling off the substrate, the method further comprises: A biocompatible layer is formed on a side of the flexible composite substrate away from the light emitting device.

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