118 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 provides an image correction processing method and system for a vehicle-mounted ground projection system. The method comprises the following steps: S1, acquiring a current motor rotation angle and a vehicle front distance of a selected ground projection area; s2, calculating four angular points of a target image according to the current motor rotation angle and the vehicle front distance of the selected ground projection area; s3, calculating a transformation matrix of a corrected image according to the four corners of the original image and the four corners of the target image, and correcting the original image to obtain the target image; and S4, transmitting the target image data to a DLP (Digital Light Processing) for projection. According to the invention, the image deformation problem in the vehicle-mounted ground projection process can be corrected in real time by combining the rotation angle of the motor and the selected front distance of the ground projection area in front of the vehicle; it is ensured that no matter how the vehicle moves or the projection angle is adjusted, the projected image can be kept clear and does not deform, and the visual experience of a user is greatly improved.

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 embodiment of the invention discloses a personalized ear mold integrated manufacturing method based on multi-material digital light processing, and relates to the technical field of additive manufacturing. The method comprises the following steps: acquiring a personalized ear mold three-dimensional numerical model of a specific patient; adding a static load based on the dead weight of the hearing aid and a dynamic load based on the periodic force of the chewing motion to the numerical model, and performing dynamic stress analysis on the numerical model based on the added loads; based on a stress analysis result, dividing material areas with different hardness in the numerical model, including a rigid supporting area, a flexible sealing area and a transition area; according to the stress gradient line, the volume fraction of the rigid material and the volume fraction of the flexible material used for DLP three-dimensional printing at all positions in the transition area are determined; and according to the volume fraction and the printing energy density of the rigid supporting area and the printing energy density of the flexible sealing area, the printing energy density of all the positions in the transition area is determined. According to the embodiment, the manufacturing quality and efficiency of the ear mold can be improved.

The invention provides light-cured bio-ink, a digital light processing 3D printing product, a preparation method of the digital light processing 3D printing product and application of the digital light processing 3D printing product in preparation of a skull repair material, and belongs to the technical field of biological medicine. The material provided by the invention can continuously release HO under different environmental conditions. Particularly, in a simulated in-vivo environment, the GHDP hydrogel keeps stable HO release for a long time, so that a signal channel related to angiogenesis is continuously activated, and in the skull defect repair process, the GHDP hydrogel can promote neovascularization and osteogenic differentiation by regulating and controlling the HO level, so that the skull defect repair effect is improved. And a new strategy and thought are provided for promoting tissue regeneration by utilizing redox signal regulation and control.

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.

The invention provides a method for constructing a multi-phase multi-material structure through DLP3D printing and SLS laser selective sintering. The method comprises the steps that 1, materials are prepared; photosensitive resin is used as a matrix, a ceramic precursor, a metal particle precursor and a functional resin mixed material suitable for photocuring 3D printing are prepared, and it is ensured that the viscosity, rheological property and stability of all materials meet the photocuring printing requirement. And 2, carrying out photocuring 3D printing. Step 2, the multiple kinds of slurry in the step 1 are sequentially loaded into an independent special material groove of 3D printing equipment, layer-by-layer curing printing is conducted through the digital light processing technology according to preset three-dimensional model geometric information, and in the printing process, different materials are deposited to a designated area according to the design layout by adjusting the printing sequence and the light source position. The invention provides a new possibility for manufacturing a complex and multifunctional composite structure.

The invention discloses an ultra-large octave antenna based on an organic photoconductive material, and belongs to the field of metamaterials and antennas. Comprising an organic photoconductor film electromagnetic surface and a digital light processing module capable of projecting different patterns on the surface of the organic photoconductor film electromagnetic surface, the organic photoconductor film electromagnetic surface can change conductivity distribution through light control, and the digital light processing module can dynamically adjust the size and shape of the patterns projected on the organic photoconductor film electromagnetic surface. Therefore, a reconfigurable antenna array is generated, and cross-multi-octave ultra-wideband electromagnetic wave signal receiving and transmitting are realized. The electromagnetic surface of the organic photoconductor film sequentially comprises a photoconductive material layer, a first light-transmitting glass layer, an indium tin oxide microstrip line feed layer, a second light-transmitting glass layer and a substrate indium tin oxide layer according to a lamination sequence. According to the invention, the problems of narrow bandwidth, slow response and high cost of a traditional reconfigurable antenna are solved.

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 invention discloses a circuit board system and laser projection equipment, and belongs to the field of laser projection. The invention provides a circuit board system. The circuit board system comprises a power panel, a light source driving module and a control module, the control module comprises a first circuit board, a first control circuit and a digital light processing DLP chip, and the first circuit board and the power panel are separately arranged; the light source driving module comprises a second circuit board and a laser. The DLP chip and the DMD light valve are both located on the first circuit board in the control module, and it can be guaranteed that the probability that the control signal sent by the DLP is interfered is low. And when the form of the laser in the laser projection equipment needs to be replaced, only the light source driving module needs to be replaced, so that the research and development cost and the production cost of the laser projection equipment can be reduced.

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 present invention provides a preparation method for a nickel-iron battery, which specifically includes the following steps: S1, designing a three-dimensional structure, stirring a 3D printing slurry evenly, and then sequentially performing digital light processing printing, degreasing sintering, and high-temperature reduction to obtain a 3D porous nickel template; S2, depositing graphene on the surface of the 3D porous nickel template obtained in step S1, and obtaining nitrogen-doped graphene foam after acid etching and freeze-drying; S3, preparing a positive electrode; S4, preparing a negative electrode; S5, preparing a nickel-iron battery: the positive electrode of the nickel-iron battery obtained in step S3 and the negative electrode of the nickel-iron battery obtained in step S4 are respectively placed in a gel electrolyte for immersion, then taken out, and laminated to each other to obtain a nickel-iron battery. The present invention also provides a nickel-iron battery prepared by the above preparation method. Compared with the prior art, the present invention utilizes the technical advantages of 3D printing and the microscopic porous structure to give the electrode structure flexibility while also giving the nickel-iron battery good flexibility, thereby meeting more application scenarios and actual needs.

A method of manufacturing customized ceramic labial / lingual orthodontic brackets by digital light processing, said method comprises measuring dentition data of a profile of teeth of a patient, wherein measuring dentition data is performed using a CT scanner or intra-oral scanner, based on the dentition data, creating a three dimensional computer-assisted design (3D CAD) model of the patient's teeth using reverse engineering, and saving the 3D CAD model on a computer, designing a 3D CAD bracket structure model for a single labial or lingual bracket structure, importing the 3D CAD bracket structure model into a Digital Light Processing (DLP) machine, directly producing the bracket by layer manufacturing.

The present invention provides a DLP (Digital Light Processing) vehicle headlamp. The DLP vehicle headlamp includes an illumination light source, a digital micromirror device (DMD), an imaging lens, and an OFF light utilization device. Among them, the illumination light source is used to emit illumination light; the digital micromirror device has an ON state and an OFF state, and the digital micromirror device is used to receive the illumination light irradiation and generate first reflected light and second reflected light in the ON state and the OFF state respectively; the imaging lens is used to receive the first reflected light in the ON state to form high beam illumination; the OFF light utilization device is used to receive the second reflected light in the OFF state to form low beam illumination. The DLP vehicle headlamp provided by the present invention uses the ON state and the OFF state of the digital micromirror device for high beam and low beam illumination, which can effectively improve the light utilization efficiency and achieve small volume and high brightness.

The invention belongs to the technical field of biomedical materials, and particularly relates to collagen bio-ink for glucose responsive DLP 3D printing, a preparation method and application. The invention provides a glucose responsive collagen bio-ink for DLP (Digital Light Processing) 3D (Three Dimensional) printing. The bio-ink can be used for preparing hydrogel with good mechanical properties, fidelity and degradation resistance under the physiological condition of pH 7; the gel can be responsively released in a hyperglycemia environment; the released curcumin can remove ROS in cells, regulate and control expression of macrophage inflammatory factors and exert antioxidant and anti-inflammatory effects, and the gel material can promote proliferation, adhesion and migration of the cells and has good biocompatibility and biological activity; a personalized solution with intelligent drug release, mechanical adaptation and active healing promoting functions is provided for diabetes wound treatment.

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.