Eyes On The Prize
Panels go through all manner of inspection during the manufacturing process. Some of these will be done with automated equipment. Others are done manually, sometimes in yellow-lit environments where certain light wavelengths are filtered out so as not to interfere with photosensitive coatings.
I recall passing one normally illuminated area in which test patterns were examined by lines of technical staff, with the control systems running Windows XP. This is actually a critical part of the review process in which human ability to discern color accuracy is paramount. Interestingly, nearly all of these examination techs are women aged 18 to 22. After extensive testing, Samsung found that this particular group had better color discernment capability than any other group.