US 11,911,969 B2
3D printer with adjustable light transmission rate and control method thereof
Daekeun Kim, Seoul (KR)
Assigned to INDUSTRY-ACADEMIC COOPERATION FOUNDATION, DANKOOK UNIVERSITY, Yongin-si (KR)
Filed by INDUSTRY-ACADEMIC COOPERATION FOUNDATION, DANKOOK UNIVERSITY, Yongin-si (KR)
Filed on Nov. 6, 2020, as Appl. No. 17/092,204.
Prior Publication US 2022/0143921 A1, May 12, 2022
Int. Cl. B29C 64/393 (2017.01); G02B 26/02 (2006.01); B29C 64/135 (2017.01); B33Y 50/02 (2015.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B29C 64/268 (2017.01)
CPC B29C 64/393 (2017.08) [B29C 64/135 (2017.08); B29C 64/268 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12); G02B 26/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A 3D printer capable of adjusting a light transmission rate, comprising:
a plate on which a forming material is disposed;
a light source disposed above the plate and emitting light for curing the forming material;
a course setting unit setting a processing course of the light emitted to the forming material;
a beam shifting speed determination unit determining a beam shifting speed in each processing zone of the processing course set by the course setting unit; and
a light intensity determination unit determining an accumulated intensity of light emitted to the forming material in each processing zone of the processing course, wherein the accumulated intensity of light is determined based on the beam shifting speed in each processing zone of the processing course determined by the beam shifting speed determination unit;
a translucent plate disposed between the forming material and the light source and adjusting a transmission rate of the light emitted to the forming material based on the beam shifting speed in each processing zone of the processing course and the accumulated intensity of light;
wherein a transparency in each processing zone of the translucent plate is inversely proportional to the accumulated intensity of light, and the transmission rate of light is adjusted corresponding to the transparency of the translucent plate.