US 12,214,603 B2
Method for enhancing printing resolution for photosensitive imaging systems
Yi-che Chen, Zhubei (TW); and Bor Hon Tu, Zhubei (TW)
Assigned to Polaroid IP B.V., Enschede (NL)
Filed by Polaroid IP B.V., Enschede (NL)
Filed on May 27, 2022, as Appl. No. 17/827,501.
Prior Publication US 2023/0382131 A1, Nov. 30, 2023
Int. Cl. B41J 2/45 (2006.01); B41J 2/32 (2006.01); B41J 2/355 (2006.01); G06K 15/02 (2006.01); G06K 15/12 (2006.01); H04N 1/40 (2006.01); H04N 1/409 (2006.01)
CPC B41J 2/45 (2013.01) [B41J 2/32 (2013.01); B41J 2/3558 (2013.01); G06K 15/021 (2013.01); G06K 15/1295 (2013.01); H04N 1/40068 (2013.01); H04N 1/4092 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for enhancing resolution of a radiation sensitive microcapsule-based printer, the method comprising:
generating, by a controller, multiple subpixels in a sub-scan direction based on an image data set of an image to be printed on a photosensitive medium;
mapping, by the controller, multiple grids onto the photosensitive medium, the multiple grids corresponding to the multiple subpixels;
determining, by the controller, an exposure energy required for each grid of the multiple grids based on a corresponding subpixel of the multiple subpixels;
allocating, by the controller, the exposure energy required for each grid into a first exposure level and a second exposure level; and
exposing, by the controller, each grid of the photosensitive medium to the corresponding first exposure level and the corresponding second exposure level sequentially using an exposure element as the photosensitive medium passes through the radiation sensitive microcapsule-based printer in the sub-scan direction, wherein each grid is smaller in the sub-scan direction than the exposure element.