Karl D.D. Willis

Methods, systems, and apparatus, including medium-encoded computer program products, for three dimensional print adhesion reduction using photoinhibition include, in one aspect, a method including: moving a build plate in a vat of liquid including a photoactive resin; creating a photoinhibition layer within the liquid directly adjacent a window of the vat by directing a first light through the window into the liquid, the first light having a first wavelength selected to produce photoinhibition;… Show more

Methods, systems, and apparatus, including medium-encoded computer program products, for three dimensional print adhesion reduction using photoinhibition include, in one aspect, a method including: moving a build plate in a vat of liquid including a photoactive resin; creating a photoinhibition layer within the liquid directly adjacent a window of the vat by directing a first light through the window into the liquid, the first light having a first wavelength selected to produce photoinhibition; and creating a solid structure on the build plate from the photoactive resin within a photoinitiation layer of the liquid by directing a second light through the window into the liquid, where the photoinitiation layer resides between the photoinhibition layer and the build plate, and the second light has a second wavelength different than the first wavelength. Show less

According to embodiments of the present invention are a system and method that use projected structured patterns of light and linear optical sensors for motion tracking. Sensors are capable of recovering two-dimensional location within the projection area, while several sensors can be combined for up to six degrees of freedom tracking. The structure patterns are based on m-sequences, in which any consecutive subsequence of m bits is unique. Both digital and static light sources can be used. The… Show more

According to embodiments of the present invention are a system and method that use projected structured patterns of light and linear optical sensors for motion tracking. Sensors are capable of recovering two-dimensional location within the projection area, while several sensors can be combined for up to six degrees of freedom tracking. The structure patterns are based on m-sequences, in which any consecutive subsequence of m bits is unique. Both digital and static light sources can be used. The system and method of the present invention enables high-speed, high precision, and low-cost motion tracking for a wide range of applications. Show less

Methods, systems, and apparatus, including medium-encoded computer program products, for improving 3D printing systems and techniques include, in one aspect, a system including: three dimensional (3D) printer hardware; and at least one computer communicatively coupled with the 3D printer hardware, the at least one computer programed to receive 3D print type inputs for an object to be 3D printed and create a 3D print profile including parameters for 3D printing the object using the 3D printer… Show more

Methods, systems, and apparatus, including medium-encoded computer program products, for improving 3D printing systems and techniques include, in one aspect, a system including: three dimensional (3D) printer hardware; and at least one computer communicatively coupled with the 3D printer hardware, the at least one computer programed to receive 3D print type inputs for an object to be 3D printed and create a 3D print profile including parameters for 3D printing the object using the 3D printer hardware by matching the 3D print type inputs against a database. Show less

Methods, systems, and apparatus, including medium-encoded computer program products, facilitate the design and use of 3D printed auxetic structures. In one aspect, a system includes one or more computer storage media having instructions stored thereon; and one or more data processing apparatus configured to execute the instructions to perform operations including (i) receiving an input specifying a three dimensional (3D) model of a 3D structure that includes at least two different materials… Show more

Methods, systems, and apparatus, including medium-encoded computer program products, facilitate the design and use of 3D printed auxetic structures. In one aspect, a system includes one or more computer storage media having instructions stored thereon; and one or more data processing apparatus configured to execute the instructions to perform operations including (i) receiving an input specifying a three dimensional (3D) model of a 3D structure that includes at least two different materials having a predefined arrangement with respect to each other to give the 3D structure a negative Poisson ratio, (ii) receiving an input regarding a change for the 3D structure, and (iii) modifying the predefined arrangement of the at least two different materials with respect to each other in response to the input regarding the change.
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Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium, including a method for 3D printing without preprocessing a CAD model before delivery to a 3D printer. The CAD model for a design to be printed is received by a 3D printer. Instructions are generated for printing the first slice. While the instructions are used to start printing the CAD model, dynamic real-time slicing is performed on a remaining portion of the CAD model. Preprocessed data… Show more

Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium, including a method for 3D printing without preprocessing a CAD model before delivery to a 3D printer. The CAD model for a design to be printed is received by a 3D printer. Instructions are generated for printing the first slice. While the instructions are used to start printing the CAD model, dynamic real-time slicing is performed on a remaining portion of the CAD model. Preprocessed data, model analysis information or real-time feedback is received during the printing of a respective slice. A next slice is identified, and slicing parameters are adjusted, including adjusting a slicing parameter for the next slice. Instructions for printing the next slice are generated. The next slice is printed based on the generated instructions. Dynamic real-time slicing is repeated to generate a then next slice and associated printing instructions. Show less

Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium, including a system for reducing adhesion during cure processing for a stereolithographic 3D printed object. The system includes resin tank for maintaining a liquid photopolymer resin. The system further includes a light source. The system further includes controller for selectively exposing the liquid photopolymer resin to form a solid object in the resin tank. The resin tank is constructed… Show more

Methods, systems, and apparatus include computer programs encoded on a computer-readable storage medium, including a system for reducing adhesion during cure processing for a stereolithographic 3D printed object. The system includes resin tank for maintaining a liquid photopolymer resin. The system further includes a light source. The system further includes controller for selectively exposing the liquid photopolymer resin to form a solid object in the resin tank. The resin tank is constructed of a rigid material that has an oxygen permeability that is above a first threshold so as to reduce a separation force required to remove the solid object from the resin tank after curing. Show less

A computer-implemented layout tool includes a mechanical design engine for configuring mechanical design components to be included in a design, an electrical design engine for configuring electrical components to be included in the design, a constraint engine for identifying a 3D printer to be used to print the design and to provide design constraints including feedback for inoperative or impermissible configurations of one or more mechanical components or electrical pathways associated with… Show more

A computer-implemented layout tool includes a mechanical design engine for configuring mechanical design components to be included in a design, an electrical design engine for configuring electrical components to be included in the design, a constraint engine for identifying a 3D printer to be used to print the design and to provide design constraints including feedback for inoperative or impermissible configurations of one or more mechanical components or electrical pathways associated with the design; and a simulation engine for simulating, at least, electrical performance of the design based on one or more electrical components added to the design after printing and proposed electrical pathways.
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Methods, systems, and apparatus, including computer programs encoded on a storage medium, for integrating components into objects that are to be 3D printed. One of the methods includes obtaining a three-dimensional model of a first object; receiving an input identifying an additional component; generating a digital representation of the additional component; integrating the digital representation of the additional component with the three-dimensional model; and providing the three-dimensional… Show more

Methods, systems, and apparatus, including computer programs encoded on a storage medium, for integrating components into objects that are to be 3D printed. One of the methods includes obtaining a three-dimensional model of a first object; receiving an input identifying an additional component; generating a digital representation of the additional component; integrating the digital representation of the additional component with the three-dimensional model; and providing the three-dimensional model with the integrated digital representation to a 3D printer for fabrication. Show less

A device-mounted infrared (IR) camera and a hybrid visible/IR light projector may be used to project visible animation sequences along with invisible (to the naked eye) fiducial markers. A software (or firmware) platform (either on the handheld device or to which the device communicates) may track multiple, independent projected images in relation to one another using the fiducial markers when projected in the near-IR spectrum. The resulting system allows a broad range of new interaction… Show more

A device-mounted infrared (IR) camera and a hybrid visible/IR light projector may be used to project visible animation sequences along with invisible (to the naked eye) fiducial markers. A software (or firmware) platform (either on the handheld device or to which the device communicates) may track multiple, independent projected images in relation to one another using the fiducial markers when projected in the near-IR spectrum. The resulting system allows a broad range of new interaction scenarios for multiple handheld projectors being used in any environment with adequate lighting conditions without requiring the environment to be instrumented in any way. Show less

An image projection system may be configured to project objects which respond to movements and gestures made using a handheld projector, as well as to methods for controlling the projected objects based on such user input. For example, users may interact with and control objects in a projection frame by moving and/or gesturing with the handheld projector. Further, objects or characters projected using the handheld projector may be configured to perceive and react to physical objects in the… Show more

An image projection system may be configured to project objects which respond to movements and gestures made using a handheld projector, as well as to methods for controlling the projected objects based on such user input. For example, users may interact with and control objects in a projection frame by moving and/or gesturing with the handheld projector. Further, objects or characters projected using the handheld projector may be configured to perceive and react to physical objects in the environment. Similarly, elements of the physical environment may be configured to respond to the presence of the projected objects or characters in a variety of ways. Show less

Techniques for presenting display frames projected using a handheld projector. Embodiments detect a marker embedded in a display surface. A first display frame is projected onto the display surface from the handheld projector, where the first display frame projects, on the display surface, one or more animated objects positioned relative to the detected marker embedded in the display surface. Embodiments generate one or more subsequent display frames projected from the handheld projector… Show more

Techniques for presenting display frames projected using a handheld projector. Embodiments detect a marker embedded in a display surface. A first display frame is projected onto the display surface from the handheld projector, where the first display frame projects, on the display surface, one or more animated objects positioned relative to the detected marker embedded in the display surface. Embodiments generate one or more subsequent display frames projected from the handheld projector, where at least a first one of the animated objects in the one or more subsequent display frames is positioned relative to the detected marker embedded in the display surface. Show less

An image drawing method for drawing an image on an input screen of a portable terminal having input keys arranged in an N×M matrix includes the steps of: determining a size of an input window formed of grid squares arranged in an N×M matrix; determining a position of the input window on the input screen; displaying the input window of the size determined in the input window size determination at the position of the input screen, the position being determined in the input window position… Show more

An image drawing method for drawing an image on an input screen of a portable terminal having input keys arranged in an N×M matrix includes the steps of: determining a size of an input window formed of grid squares arranged in an N×M matrix; determining a position of the input window on the input screen; displaying the input window of the size determined in the input window size determination at the position of the input screen, the position being determined in the input window position determination; and in response to user input being performed on one of the input keys arranged in the N×M matrix, performing a drawing process at the grid square corresponding to the position in the N×M matrix at which the user input has been performed. Show less