Abstract: A method for three-dimensional printing for forming a three-dimensional structure on a moving platform is provided. The three-dimensional structure includes a shell portion and a foamy filling portion. The method includes the following: a digital shell model of the three-dimensional structure is built. Next, the digital shell model is sliced into a plurality of cross-section information. Next, a corresponding liquid forming material is cured on the moving platform according to the cross-section information to form a plurality of shell layers. Next, foaming process is performed on the liquid forming material to form a foamy forming material. Next, the foamy forming material located within the corresponding shell layers is cured to form a plurality of foamy filling layers. Afterward, the shell layers and the foamy filling layers are alternately formed on the moving platform and stacked to form the three-dimensional structure. A three-dimensional printing apparatus adopting the method is also provided.

Abstract: A three-dimensional printing device including a body, a tank, an origin target, a sensor, and a control module is provided. The tank is rotatably assembled on the body, and the tank is filled with a liquid forming material. The origin target is disposed on the tank and rotates along with the tank. The sensor is disposed on the body and located above the liquid forming material to sense a liquid level of the liquid forming material. The control module electrically connects the tank and the sensor and drives the tank to rotate. The sensor is located above a rotation path of the origin target, and the control module senses the origin target through the sensor and positions a rotation origin of the tank.

Abstract: The disclosure provides a printing layer trimming method and an electronic device using the same. The printing layer trimming method is suitable for the electronic device and includes steps as follows. An original layer is converted into a first printing layer. At least one data region of the first printing layer is identified to identify at least one blank region of the first printing layer. Then, the blank region of the first printing layer is trimmed off The trimmed first printing layer is further converted into a print head signal data and provided to a printing device to print a corresponding three-dimensional structure. The disclosure also provides another printing layer trimming method and an electronic device using the same for trimming a second printing layer generated according to a print head signal data and providing the second printing layer to a printing device to print a corresponding three-dimensional structure.

Abstract: A 3D printing method of improving effectiveness of pouring materials for a stereolithography 3D printer (2) is provided. The stereolithography 3D printer (2) controls a moving module (22) to start to move a material tank (23) when a condition to supply for refilling satisfies, controls a material-providing module (26) to start to pour light-curable materials (41) into the material tank (23), and controls a light module (21) and a curing platform (24) to print multiple layers of slice physical models layer (42) by layer according to multiple layers of print data after completion of pouring the light-curable materials (42) and moving, the multiple layers of slice physical models (42) constitutes a 3D physical model. Thus, the waiting time after supplementing to the light-curable materials can be effectively reduced, and the time required by execution of 3D printing can be reduced as well.

Abstract: A method of making surfaces smooth or flat for 3D printing applied to a stereolithography 3D printer (2) is provided. The method is to control a modeling plane of a curing platform (24) to contact light-curable materials (41) in a material tank (23), moving the modeling tank (23) by a moving module (22) for making the light-curable materials (41) in the modeling tank (23) flow, and control a light module (21) to irradiate the curing platform (24) according to print data for manufacturing one layer of slice physical model on the modeling plane. The method can effectively reduce the defects on the surface of a physical model, and improve a printing quality of the physical models.

Abstract: A three-dimensional printing device including a body, a tank, an origin target, a sensor, and a control module is provided. The tank is rotatably assembled on the body, and the tank is filled with a liquid forming material. The origin target is disposed on the tank and rotates along with the tank. The sensor is disposed on the body and located above the liquid forming material to sense a liquid level of the liquid forming material. The control module electrically connects the tank and the sensor and drives the tank to rotate. The sensor is located above a rotation path of the origin target, and the control module senses the origin target through the sensor and positions a rotation origin of the tank.

Abstract: A 3D printer including a machine platform, a container, at least one stirring element and a driving element is provided. The container contains a liquid forming material, and is movably assembled to the machine platform. The stirring element is disposed in the container to move along with the container, and has a motion mode of moving away from or moving close to a bottom of the container. The driving element is fixed on the machine platform and extends into the container. The driving element and the stirring element are mutually located on moving paths of each other. During a moving process of the container, the driving element and the stirring element lean against each other to trigger the motion mode of the stirring element to move away from or move close to the bottom of the container, so as to stir the liquid forming material in the container.

Abstract: A method for calibrating light is adapted to a 3D object generating apparatus including a housing, an optical-transparent component, and a laser light generator. The housing has an accommodating space and an opening communicating with the accommodating space. The optical transparent component is arranged on the opening, and the laser light generator is arranged within the accommodating space. The method includes the following steps: providing a first photodetector and a controller, the controller is electrically connected to the first photodetector and the laser light generator; using the controller to drive the laser light generator to generate the light and perform a scanning procedure; and stopping the scanning procedure when the first photodetector detects the light generated by the laser light generator, and then performing a 3D object generating procedure in the working region by moving the laser light generator with a preset distance.

Abstract: A 3D object generating apparatus includes an optical-transparent, a laser light generating module, and a controller. The laser light generating module includes a light emitter for outputting a spot beam, a polygon mirror, a flat-field convergent lens, and a flat-field optical sensor. The polygon mirror directs the spot beam into a linear beam. The flat-field convergent lens is positioned between the laser light generating module and the optical-transparent component, and a flat-field scanning route is formed after the linear beam passed through the flat-field convergence lens. The flat-field optical sensor is positioned on the flat-field scanning route senses an optical power of the linear beam and generates a sensed signal. The controller is electrically connected to the laser light generating module and the flat-field optical sensor, and receives the sensed signal and calibrates the optical power of the spot beam based on the sensed signal.

Abstract: A 3D object generating apparatus includes an optical-transparent, a laser light generating module, and a controller. The laser light generating module includes a light emitter for outputting a spot beam, a polygon mirror, a flat-field convergent lens, and a flat-field optical sensor. The polygon mirror directs the spot beam into a linear beam. The flat-field convergent lens is positioned between the laser light generating module and the optical-transparent component, and a flat-field scanning route is formed after the linear beam passed through the flat-field convergence lens. The flat-field optical sensor is positioned on the flat-field scanning route senses an optical power of the linear beam and generates a sensed signal. The controller is electrically connected to the laser light generating module and the flat-field optical sensor, and receives the sensed signal and calibrates the optical power of the spot beam based on the sensed signal.

Abstract: A method for calibrating light is adapted to a 3D object generating apparatus including a housing, an optical-transparent component, and a laser light generator. The housing has an accommodating space and an opening communicating with the accommodating space. The optical transparent component is arranged on the opening, and the laser light generator is arranged within the accommodating space. The method includes following steps: providing a first photodetector and a controller, the controller is electrically connected to the first photodetector and the laser light generator; using the controller to drive the laser light generator to generate the light and perform a scanning procedure; and stopping scanning procedure when the first photodetector detecting the light generated by the laser light generator, and then performing a 3D object generating procedure in the working region by moving the laser light generator with a preset distance.

Abstract: The disclosure provides a printing layer trimming method and an electronic device using the same. The printing layer trimming method is suitable for the electronic device and includes steps as follows. An original layer is converted into a first printing layer. At least one data region of the first printing layer is identified to identify at least one blank region of the first printing layer. Then, the blank region of the first printing layer is trimmed off The trimmed first printing layer is further converted into a print head signal data and provided to a printing device to print a corresponding three-dimensional structure. The disclosure also provides another printing layer trimming method and an electronic device using the same for trimming a second printing layer generated according to a print head signal data and providing the second printing layer to a printing device to print a corresponding three-dimensional structure.

Abstract: A method for three-dimensional printing for forming a three-dimensional structure on a moving platform is provided. The three-dimensional structure includes a shell portion and a foamy filling portion. The method includes the following: a digital shell model of the three-dimensional structure is built. Next, the digital shell model is sliced into a plurality of cross-section information. Next, a corresponding liquid forming material is cured on the moving platform according to the cross-section information to form a plurality of shell layers. Next, foaming process is performed on the liquid forming material to form a foamy forming material. Next, the foamy forming material located within the corresponding shell layers is cured to form a plurality of foamy filling layers. Afterward, the shell layers and the foamy filling layers are alternately formed on the moving platform and stacked to form the three-dimensional structure. A three-dimensional printing apparatus adopting the method is also provided.

Abstract: A method for partitioning a 3D printable model includes the steps of: establishing a standard build volume along three axes; accessing the 3D printable model and accessing a partitioning parameter upon determining that dimensions of the 3D printable model exceed the standard build volume; partitioning the 3D printable model into a plurality of 3D model segments based on the partitioning parameter; determining whether dimensions of each of the 3D model segments are greater than a threshold volume; adjusting the partitioning parameter when a result of the determination is negative; and forming engaging structures on cutting planes of adjacent two of the 3D model segments when the result of the determination is affirmative.

Abstract: A contact image sensor (CIS) and a recognition system and a recognition method thereof are provided. A storage unit storing driving information of the CIS is directly built in the CIS, and a control module of the CIS is enabled to actively transmit/report the driving information of the CIS back to a check terminal in response to a recognition demand, so that the check terminal recognizes a product specification of the CIS. Hence, the CIS may be further effectively recognized.