AIUI, resin 3d printers currently either use a UV laser and a set of galvos to steer it across the build plate, or a bright UV LED and an LCD to selectively admit and block light to various parts of the plate. The laser approach is higher performance but more fiddly and expensive, while the LCD approach is simpler to set up but has a shorter service life (due to UV degradation of the LCD) and produces lower light intensities at the build plate.
I have often wondered why nobody uses the DMD approach[1] common to digital laser projectors. This sounds something like that, albeit with the mirrors replaced with this LCD magic.