Patent ID: 11858199
Assignee: NEXA3D INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A vat polymerization printer, comprising:
a tank configured for containing a photo-curable liquid resin, the tank including a tank opening;
a digital light processing (DLP) light source configured to project light towards the tank opening;
a liquid crystal display (LCD) mask disposed between the DLP light source and the tank opening, the mask having pixels configurable to be individually transparent or opaque to portions of the light projected from the DLP light source; and
a controller configured to control the DLP light source to project the light with varying intensity such that portions of the light with high intensity are transmitted through one or more respective transparent pixel regions of the mask and onto opaque pixels at perimeters of the one or more transparent pixel regions of the mask and portions of the light with low intensity are blocked by respective opaque pixels of the mask.