Methods and systems for photocuring liquid with reduced heat generation using a digital light processing (DLP) light source
US12083737B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 2023 |
| Grant date | Sep 10, 2024 |
| Priority date | — |
| Expiry date | Sep 11, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y50/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In vat polymerization printer, light is projected from a digital light processing (DLP) light source towards an opening in a tank containing photo-curable liquid resin. A mask is used to filter the light from the DLP light source, the mask having pixels configurable to be individually transparent or opaque to portions of the light from the DLP light source. In a build area of the tank, the filtered light is used to cure the photo-curable liquid resin so as to form a layer of a partially formed object. The operation of the DLP light source is synchronized with the operation of the mask, such that light from the DLP light source with high intensity is transmitted through the transparent pixels of mask and light from DLP light source with low intensity is blocked by the opaque pixels of mask. The mask may enhance the resolution of DLP light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.