89 results about "Digital Light Processing" patented technology

The invention discloses a digital light processing printing control method based on temperature control microsphere bio-ink. Comprising the following steps: firstly, constructing a constitutive model of the three-phase conversion bio-ink according to melting conditions of dispersed phase microspheres in the three-phase conversion bio-ink at different printing temperatures and steady-state shear stress-shear rate curves at different printing temperatures; fitting is carried out by using the constitutive model and data in the steady-state shear stress-shear rate curve at different printing temperatures, and reconstruction coefficients and first damage coefficients corresponding to different printing temperatures are obtained; and finally, whether the three-phase conversion bio-ink has the forming capacity of the dynamic support bath at different printing temperatures or not is determined, so that the proper printing temperature is determined, and DLP printing is carried out. Proper bio-ink can be prepared according to actual bio-printing requirements, the optimal printing temperature is obtained, and accurate control over printing conditions is achieved.

Methods for calibrating a digital light processing additive manufacturing system. A method for scale factor calibration comprises: projecting calibration images of a calibration pattern by varying a projector's scaling factor; Capturing and analyzing the calibration images to determine dimensional attributes of the projected calibration pattern; Computing a calibration model fitting a relationship between the scaling factor and dimensional accuracy of the projector based on said dimensional attributes; Identifying a scaling factor where dimensional accuracy is optimal. A method for calibrating uniformity comprises: projecting a uniform pattern; capturing and analyzing a uniformity calibration image of said uniform pattern to determine a calibration intensity distribution of calibration image pixels; computing a correction map, wherein each correction map pixel is associated with a correction intensity determined using a tunable calibration factor and a calibration intensity of a corresponding calibration image pixel, wherein said tunable calibration factor depends on the calibration intensity distribution.

The invention relates to the technical field of dead pixel detection and compensation of a digital light processing projection system, in particular to a DLP dead pixel calibration and compensation method and system based on a Transform attention mechanism. According to the DLP dead pixel calibration and compensation method based on the Transform attention mechanism, a multi-scale feature pyramid is constructed, global features are extracted by using a layered multi-mode Transform encoder, and a dead pixel confidence coefficient heat map is generated in combination with a dynamic sparse mask multi-head attention mechanism; dynamically selecting compensation strategies for different types of dead pixels by adopting a dead pixel type-scene demand dual-drive time-space domain compensation pipeline; ambient light and partition temperature sensor data are integrated, and the influence of optical crosstalk and thermal drift is eliminated through a brightness adaptive calibration function; and finally, carrying out closed-loop verification and iterative optimization by adopting a loss function fused with HVS perception loss. According to the method, the defective pixel detection precision is improved from 82.3% to 99.2%, the PSNR after compensation is improved from 32.6 dB to 42.5 dB, the processing delay is reduced to 7ms / frame, and the visual quality and reliability of a DLP system are improved.

The application relates to a cartilage organoid based on a DNA-silk fibroin hybrid hydrogel sustained-release system and a preparation method and application thereof. The DNA-silk fibroin hybrid hydrogel sustained-release system is a hydrogel system after a DNA-silk fibroin hybrid hydrogel sustained-release system premixing solution is printed through a digital light processing system, wherein the DNA-silk fibroin hybrid hydrogel sustained-release system premixing solution contains DNA, silk fibroin, acrylated RGD peptide, acrylated polyethylene glycol NHS ester, glucosamine, TD-198946 and 2,4,6-trimethylbenzoyl lithium phosphate. Compared with the prior art, the glucosamine and TD-198946 introduced in the DNA-silk fibroin hybrid hydrogel sustained-release system can significantly improve the cartilage differentiation efficiency of bone marrow mesenchymal stem cells; and the application can be transplanted to a cartilage defect as a cartilage graft to promote cartilage regeneration and repair.

The invention relates to a structured light imaging system suitable for semiconductor SIP system-in-package, which comprises a central camera, and a plurality of groups of DLP projections and side cameras are symmetrically arranged on two sides of an optical axis of the central camera; the DLP projector emits parallel light beams to irradiate the surfaces of the crystal grains, and the side cameras receive reflected light rays in parallel; the device further comprises a control unit, and the control unit sequentially controls the DLP projectors and the side cameras which are symmetrically arranged in pairs to synchronously work and processes image data so as to reconstruct the three-dimensional morphology of the surface of the crystal grain. When incident light emitted by the DLP projector irradiates the surface of the crystal grain at a specific angle, specular reflection light of the incident light propagates in the symmetrical direction according to the reflection law. The side camera and the DLP projector are symmetrically arranged, so that the optical axis of the side camera is consistent with a reflection light path, and a highlight area image generated by mirror reflection is accurately captured. The layout breaks through the limitation of the traditional diffuse reflection hypothesis, so that the morphology information of the high-reflection surface can be completely acquired, and the accuracy and reliability of crystal grain three-dimensional reconstruction in SIP packaging are remarkably improved.

A resin for grayscale digital light processing 3D printing includes a donor moiety, an acceptor moiety, a rigid moiety, a photoinitiator, and a photoabsorber. The donor moiety is an acrylate monomer with a side group of a free carbonyl, a primary amine on an acrylate, a secondary amine on an acrylate, and / or a tertiary amine on an acrylate. The acceptor moiety is different than the donor moiety and is an acrylate monomer with a side group of a free hydroxy, a primary amine, secondary amine, and / or an imine. And the rigid moiety is acrylate monomer with a side group of a cyclohexyl, a substituted cyclohexyl, or a bicyclic structure. A monolithic structure formed from the resin using grayscale digital light processing 3D printing can have a Young's modulus ranging from 0.1 MPa to 100 MPa.

The application relates to the field of high polymer composite materials and packaging, and discloses a preparation process of an automobile hub bearing blister tray, which comprises the following steps: functional slurry containing the prepolymer and microcapsules is coated to form a film; a programmable energy field such as digital light processing is used to differentially irradiate the liquid film, in-situ polymerization is carried out to form a gel state semi-finished product with a high-strength bearing area and a high-flexibility buckle area; and then vacuum blister forming is carried out. The application integrates material polymerization and three-dimensional forming into one, shortens the production cycle, and reduces the energy consumption generated by traditional secondary heating forming; through composite functional microcapsules and construction of mechanical property gradients, the tray has composite functions such as active corrosion inhibition, damage self-repair and state indication, meanwhile, the tray realizes accurate matching of material performance and local functional requirements, and improves the utilization efficiency of the material and the overall reliability of the structure.

The invention relates to the technical field of medical instrument simulation and testing, in particular to a high-precision 3D printing personalized alimentary canal entity model method which comprises the steps that alimentary canal CT image data covering the range from the nasal cavity to the jejunum of a target individual and biomechanical property reference data of different sections of the alimentary canal are obtained; generating a stiffness distribution diagram; transparent flexible photosensitive resin is used as a base material, and various transparent flexible photosensitive resin materials with different elastic moduli are prepared by adding a modifier; generating a printing instruction; a digital light processing 3D printer is adopted, a solid model is printed layer by layer according to a printing instruction, the distributed transparent flexible photosensitive resin material is automatically switched and used in the printing process, and exposure parameters of ultraviolet light are dynamically adjusted based on the characteristics of the currently used transparent flexible photosensitive resin material so as to control the post-curing elastic modulus of different sections. Through accurate elastic modulus control and dynamic exposure adjustment, the mechanical properties of different sections of the digestive tract are highly consistent with the actual situation.

This invention discloses a droplet microarray chip based on molecular logic operations and its construction method, belonging to the field of biochemical analysis and detection technology. It includes a substrate layer, a functional layer on the substrate layer, and molecular logic circuitry. The functional layer is a superhydrophilic-superhydrophobic patterned porous polymer film prepared in situ on the substrate using digital light processing technology, followed by PFOC acylation. The superhydrophilic-superhydrophobic patterned porous polymer film contains arrayed superhydrophilic microreaction units, separated by superhydrophobic polymer regions. Each superhydrophilic microreaction unit encapsulates an independent microdroplet, and the molecular logic circuitry is encapsulated within each independent microdroplet. This invention, through the combination of droplet microarray chip and molecular logic circuitry, achieves systematic improvements in multi-enzyme synergistic detection capabilities, logic computation complexity, spatial isolation control, high-throughput analysis, and adaptation to biological environments.

The invention belongs to the technical field of biomedical materials, and discloses a natural tooth composite material bone grafting scaffold for alveolar bone repair and a design and preparation method thereof. The method comprises the following steps: collecting orthodontic teeth, impacted teeth, multiple teeth, loose teeth and other natural teeth extracted in oral medical treatment, and performing technical treatment to obtain raw material powder; ball-milling and mixing the bioactive glass powder, the carbon-based material powder and the natural dental powder to obtain mixed powder; the mixed powder is used as a raw material, and the bone grafting scaffold is obtained through computer aided design and digital light processing technology 3D printing; and modifying the surface of the 3D printing bracket by using the polydopamine-carbon-based material composite coating to obtain the natural tooth composite material bone grafting bracket. The natural tooth composite material bone grafting scaffold obtained by the invention has good mechanical property, controllable degradation property and antibacterial property, and has good biocompatibility and osteogenesis efficiency.

The invention discloses a preparation method and application of a functional degradable soybean oil-based bionic porous composite bone scaffold. The method comprises the following steps: taking epoxidized soybean oil acrylate as a bio-based base material, compounding isobornyl methacrylate to improve the defects of high viscosity and low photosensitivity of the bio-based base material, adding a photoinitiator containing ethyl 2, 4, 6-trimethylbenzoyl phenyl phosphonate and phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, compounding, and carrying out aging treatment to obtain base resin; mixing calcium lignosulphonate into the base resin to prepare composite photosensitive resin, and printing a triple-period extremely-small curved surface structure through a digital light processing technology and a 3D printing technology to finally obtain the functional degradable soybean oil-based bionic porous scaffold. The scaffold has calcium lignosulphonate-mediated controllable photo-thermal response behaviors of near-infrared light illumination regulation and bone scaffold component dependence under the condition of simulating the in-vivo environment of a human body, so that a controllable photo-thermal response-mediated remote shape memory function is realized, and meanwhile, a mild, safe and controllable photo-thermal curative effect can also be realized. Besides, calcium lignosulphonate promotes degradation of the composite scaffold by preferentially dissolving and generating a microporous structure on the surface of a matrix while improving the hydrophilic performance of the scaffold, and continuously releases calcium ions, so that the scaffold shows enhanced biomineralization ability and promotes cell proliferation and osteogenic differentiation. The research provides a solution with potential for the soybean oil-based biological photosensitive material in the digital light processing preparation technology and the multi-functional application of the bionic porous bone scaffold so as to deal with complex and irregular bone defects.

Methods for calibrating a digital light processing additive manufacturing system. A method for scale factor calibration comprises: projecting calibration images of a calibration pattern by varying a projector's scaling factor; Capturing and analyzing the calibration images to determine dimensional attributes of the projected calibration pattern; Computing a calibration model fitting a relationship between the scaling factor and dimensional accuracy of the projector based on said dimensional attributes; Identifying a scaling factor where dimensional accuracy is optimal. A method for calibrating uniformity comprises: projecting a uniform pattern; capturing and analyzing a uniformity calibration image of said uniform pattern to determine a calibration intensity distribution of calibration image pixels; computing a correction map, wherein each correction map pixel is associated with a correction intensity determined using a tunable calibration factor and a calibration intensity of a corresponding calibration image pixel, wherein said tunable calibration factor depends on the calibration intensity distribution.

The application discloses a multi-cell digital light processing printer and method of light field-magnetic field coupling regulation. The application couples a magnetic field generating device with a light curing device, uses a magnetic field to control and replace microspheres with different cells and different magnetic contents in a tank, so that the replacement process is parallel to the printing process, and the printing efficiency is improved; meanwhile, the single-tank non-contact replacement is used, cross contamination is reduced, and multi-cell biological structures can be manufactured with high precision, high efficiency and high cell activity.

This invention belongs to the field of polymer materials and 3D printing technology, and particularly relates to a photocurable 3D printing bio-based resin, its preparation method, and its applications. By weight, the resin is mainly composed of 50-70 parts of a photosensitive resin prepolymer matrix, 30-50 parts of the reactive diluent hydroxyethyl methacrylate (HEMA), and 1-5 parts of a photoinitiator. The prepolymer matrix is ​​prepared by ring-opening esterification of malic acid and citric acid with glycidyl methacrylate (GMA) through a specific step-temperature controlled process, followed by the compounding of precisely synthesized photosensitive malic acid monomer (MG) and photosensitive citric acid crosslinking agent (CG). This invention utilizes HEMA to effectively break the large molecular hydrogen bond network between prepolymers, achieving an effective reduction in resin viscosity while maintaining a high bio-based content. The resin of this invention exhibits low viscosity, rapid photoresponse, high double bond conversion rate, and excellent curing heat stability, making it highly suitable for stereolithography (SLA), digital light processing (DLP), and applications in electronic packaging and electromagnetic shielding.

Methods and systems for fabricating three-dimensional multi-material objects using a three-dimensional printer are disclosed. In embodiments, a three-dimensional printer includes a rotary build stage, a plurality of vats holding different resins, a projection system configured to project an image to cause resin to cure on the rotary build stage, and an ultrasonic washer comprising a washing chamber containing a wash medium and an ultrasound generator. In embodiments, a first resin in a first vat cures in a first layer of a three-dimensional object upon the rotary build stage, before being removed and placed in the washing chamber, where the three-dimensional object is rotated while exposed to acoustic waves in order to remove waste residue. In embodiments, the three-dimensional object is then placed in a second vat to enable a second resin to cure in a second layer, before being similarly washed, enabling efficient creation of three-dimensional multi-material objects.

The photocuring 3D printing cement-based composite material is prepared by the following steps: adding a stabilizer into deionized water, and stirring until the stabilizer is completely dissolved to obtain a stabilizer solution; adding an organic monomer, a cross-linking agent and a dispersing agent into the stabilizer solution, stirring until the materials are completely dissolved, then adding a photoinitiator, and performing ultrasonic dispersion to obtain an organic mixed solution; placing the mixed solution in a vacuum drying oven, and removing oxygen at room temperature; adding cement and a water reducing agent into the deoxygenated mixed solution, and uniformly stirring to obtain a precursor solution; the precursor solution is poured into a digital light treatment 3D printer material pool, the sliced three-dimensional model is printed, organic components in the precursor solution are subjected to a photopolymerization reaction, and a polymer template wrapped with cement particles is formed through 3D printing; and coating a film, and carrying out standard curing for 28 days, so that the cement particles are subjected to hydration reaction continuously, and finally, the set and hardened light-cured 3D printing cement-based composite material is obtained. And high-precision forming of a complex structure is achieved.

The ability to efficiently and reliably transmit, route and receive data across telecommunication networks is essential for existing and evolving applications where connectivity to these networks is a ubiquitous aspect of society today. However, limitations in existing telecommunication networks impact this through performance, cost, and speed. To address this the inventor has established improvements with respect to routing (switching), processing, and monitoring. For routing low latency switch architectures for improving packet-based data switching are described. For processing digital optical logic devices and digital optical processing structures for enhanced functionality and processing within optical telecommunication networks are described. For monitoring improved optical connectors which provide embedded monitoring and analytical functionality for improved management of optical telecommunication networks are described.

The present invention provides a photopolymerisable composition for 4D printing, comprising an acrylated polyol (AOPO) derived from a natural oil, such as olive oil, and acrylic acid as a comonomer. The composition is used in a solvent-free digital light processing (DLR) method to fabricate high-resolution, multifunctional objects. The resulting 4D printed objects are biocompatible, hemocompatible, and cytocompatible. They exhibit excellent temperature- responsive shape memory properties activated near body temperature, inherent antimicrobial activity against both gram-negative and gram-positive bacteria, and tuneable mechanical properties suitable for soft tissue engineering. Furthermore, the composition can be loaded with therapeutic agents, such as progesterone, to form biodegradable objects capable of sustained, controlled drug release. These properties make the material ideal for medical implants, cardiovascular stents, and drug delivery devices.

This invention discloses a photocuring process visualization ink composition, comprising a photocrosslinkable precursor component, a photoinitiator component, and a free radical indicator. During photocuring, the free radical indicator reacts with free radicals generated by the photoinitiator under photoexcitation, changing from one color state to another. The light absorption peak of the free radical indicator is spectrally separated from the excitation wavelength of the photoinitiator. This invention also discloses a method for visualizing the photocuring process using the above composition and an additive manufacturing process with visualization monitoring capabilities. The method described in this invention is compatible with most photocuring systems based on free radical polymerization mechanisms, and the monitoring process is applicable to various photo-based 3D printing technologies such as volumetric additive manufacturing, digital light processing, and stereolithography, providing a material and methodological basis for process visualization and closed-loop control in bio-3D printing.

The application discloses a large-format gray-scale image line-by-line rolling exposure method and system based on DLP projection and relates to the technical field of digital light processing additive manufacturing. The application aims at the problems of existing large-format splicing technology, such as forming defects, low gray-scale modulation efficiency of traditional line-by-line exposure, and strong binding between display line number and gray-scale output, maps and expands 8-bit original gray-scale values into 11-bit expanded gray-scale values through a gray-scale stretching algorithm of an upper computer, and decomposes the 11-bit expanded gray-scale values into bit plane data, combines DDR dynamic data scheduling and BLOCKRAM cache incremental update logic based on bit plane weight at an FPGA end, and realizes time domain cumulative exposure of pixel gray-scale values. The application can realize seamless printing of 256 gray scales under any effective display line number, greatly improves exposure efficiency, eliminates splicing defects, and improves system flexibility and stability.

The application discloses a silicon carbide ceramic slurry for 3D printing, a preparation method and application thereof, and a silicon carbide ceramic. 50 The silicon carbide ceramic slurry is prepared from the following raw materials in parts by weight: 55-70 parts of silicon carbide powder, 22-42 parts of photosensitive resin, 2-3 parts of dispersing agent, and 1-5 parts of initiator. 50 The silicon carbide powder comprises coarse silicon carbide particles with a size of 10.5-12 microns and fine silicon carbide particles with a size of 0.85-1.5 microns. The silicon carbide slurry has small scattering in the printing process of an additive manufacturing digital light processing photocuring 3D printer, has better size precision of a printed sample, and can print more complex structures.

This invention relates to the field of digital light processing (DLP) technology, specifically a method for preparing ceramic-bonded diamond grinding blocks with piezoelectric effect. The method uses lead zirconate titanate-based piezoelectric powder, diamond powder, and a glassy phase as raw materials to prepare a ceramic-bonded diamond composite powder. A slurry is prepared by mixing photosensitive resin, organic solvent, and dispersant. The composite powder is then slowly added to the slurry and dispersed at high speed to prevent particle agglomeration. Vacuum degassing is then performed to obtain a uniform and stable composite slurry. A green grinding block is obtained by photopolymerization 3D printing, followed by debinding and high-temperature sintering. Finally, the sintered green block undergoes polarization treatment to achieve piezoelectric orientation of the lead zirconate titanate phase, resulting in a ceramic-bonded diamond grinding block with both high hardness and piezoelectric effect. This method offers controllable process control and high forming precision. The prepared grinding block can utilize the piezoelectric effect to achieve self-monitoring and self-excitation functions, making it suitable for precision and efficient grinding.

Control of preceramic polymer crosslinking for UV-curable processing is essential for fine 3D printing with high ceramic conversion for sustainable polymer-derived ceramics (PDC) engineering. While various factors influencing ceramic yield have been studied, the systematic exploration of the relationship between crosslinking and ceramic yield, especially when crosslinking increases volatile elements, remains open for further investigation. This addresses this gap by utilizing vat photopolymerization (VP) additive manufacturing (AM) as a versatile platform for controlling preceramic crosslinking and ceramic yield. By rationally designing and tuning the photochemical crosslinking through digital light processing (DLP), it is shown that the ceramic yield can be enhanced from 64% to over 86%, even with added volatile elements. The post-pyrolysis ceramic yield can be closely correlated with the pre-pyrolysis crosslinking of the preceramic network represented by its stiffness, which suggests a fast, energy-efficient, non-destructive methodology to predict and improve ceramic yield.

The application discloses a photocuring 3D printer for processing magnetic resin, and belongs to the technical field of 3D printing, which comprises a tray, a magnetic scraper coating mechanism is arranged on one side of the top of the tray, the magnetic scraper coating mechanism comprises a driving piece in transmission connection with the tray, a hollow scraper main body is in transmission connection with the driving piece, the scraper main body is located in the tray, a plurality of groups of permanent magnets are arranged in the scraper main body at equal intervals, a release film assembly is arranged in the tray, a digital light processing device is arranged below the tray, and a forming assembly is arranged on the side, away from the driving piece, of the top of the tray. The magnetic scraper coating mechanism is arranged to solve the leveling problem of high-viscosity magnetic resin in the printing process and the alignment problem of the magnetization direction; the scraper main body uniformly scrapes and levels the resin through movement, the waiting time for automatic leveling is saved, and therefore the printing speed is greatly improved; meanwhile, the height of the scraper main body can be adjusted, so that the thickness of the resin layer can be accurately controlled.

The invention discloses porous Al2O3 ceramic with multi-scale pores and a preparation method of the porous Al2O3 ceramic, and belongs to the field of porous materials. The porous material is composed of a lattice structure framework which is prepared by adopting a digital light processing technology and has a millimeter-level pore diameter and a porous ceramic matrix which is prepared by adopting a foam injection-coagulation method and has micron-level random pores. The porous ceramic prepared by the invention has the advantages of low thermal conductivity, low preparation cost and controllable mechanical properties.

The invention belongs to the technical field of polyether-ether-ketone materials, and particularly relates to printable polyether-ether-ketone ink, a preparation method of the printable polyether-ether-ketone ink and a polyether-ether-ketone composite material. The printable polyether-ether-ketone ink provided by the invention is prepared from the following components in parts by mass: 99 to 101 parts of 4-acryloylmorpholine, 5 to 20 parts of polyethylene glycol diacrylate-400, 30 to 35 parts of polyether-ether-ketone resin and 2 to 3 parts of a photoinitiator. According to the invention, polyether-ether-ketone resin (PEEK) particles are introduced into an acrylate photosensitive resin system (4-acryloylmorpholine and polyethylene glycol diacrylate-400), so that polyether-ether-ketone printing based on a digital light processing (DLP) technology is realized.

The application relates to a method for ultrasonic-assisted construction of a magnetic liquid metal complex structure, which comprises the following steps: a soluble resin positive mold with a target complex spatial structure is manufactured by adopting a digital light processing 3D printing technology; an elastic PDMS mold with a three-dimensional closed cavity is prepared by adopting a PDMS reverse mold technology; neodymium iron boron magnetic particles are mixed with liquid metal gallium to prepare a uniform magnetic liquid metal composite material; the PDMS mold is installed on an ultrasonic coupling platform, the magnetic liquid metal composite material is injected into the pouring port of the mold, and an ultrasonic wave field is applied to the PDMS mold during the pouring process; and the PDMS mold is dissolved by using a solvent at a temperature lower than the melting point of the magnetic liquid metal, so that an independent magnetic liquid metal complex three-dimensional structure is obtained. The application realizes physical intervention on the flow state of the liquid metal and dynamic regulation on the spatial distribution of particles by using ultrasonic vibration field pouring of the magnetic liquid metal, and improves the filling capacity and morphology fidelity of the liquid metal in the three-dimensional complex structure.

Provided is a semiconductor measurement apparatus including a light source configured to emit light, a digital light processor configured to generate structured light based on the light emitted by the light source, a first polarizer configured to transmit the structured light, a second polarizer configured to transmit light reflected from a sample, passing through the first polarizer, a spectrometer configured to receive light transmitted through the second polarizer, and at least one processor configured to generate polarization data by analyzing the light received by the spectrometer.

The invention provides a DLP equipment and material collaborative process, and relates to the technical field of high-end electronic material design and intelligent manufacturing, and the DLP equipment and material collaborative process comprises the following steps: based on high-throughput calculation, machine learning and material genome engineering technologies, constructing a multi-target generative AI model fusing a polymerization activity discriminator and printability scoring; the method has the advantages that the problem of compatibility of material chemical rationality and DLP process feasibility is solved by constructing a generative AI and printability dual-threshold screening collaborative system fusing physical constraints, and the sample piece precision, surface quality and performance consistency are remarkably improved by means of dynamic optimization manufacturing and online real-time evaluation; and finally, multi-target collaborative optimization is realized within 30 rounds of iteration through data closed-loop feedback, the research and development period is greatly shortened, the cost is reduced, a portable platform and a database are formed, and a full-chain technical support is provided for autonomous controllability and industrialization of high-end electronic materials.

The invention discloses a soybean oil-based composite bone scaffold with photo-thermal mediated shape memory and thermal therapy functions and a preparation method of the soybean oil-based composite bone scaffold. The method comprises the following steps: taking bio-based acrylated epoxidized soybean oil and polyethylene glycol diacrylate as a composite matrix, doping natural melanin nanoparticles as functional components into the composite matrix to prepare composite photosensitive resin, and finally preparing the porous scaffold through a digital light treatment 3D printing technology. Under irradiation of near-infrared light, the composite scaffold shows a controllable and efficient photo-thermal response behavior, and the target steady-state temperature can be achieved by adjusting the loading capacity and irradiation conditions of the natural melanin nanoparticles. On one hand, the photothermal effect can trigger shape memory recovery so as to realize minimally invasive implantation and shape self-adaptive filling of irregular bone defects. On the other hand, the composite scaffold shows an efficient photo-thermal inhibition effect (the inhibition rate exceeds 90%) on human osteosarcoma cells. In addition, the composite scaffold exhibits enhanced in vitro biomineralization ability. The invention provides a promising solution for designing and preparing a multifunctional bio-based 3D printing bone scaffold to cope with the challenge of complex bone defects.