Thanks for linking, I'll be reaching out to and crediting Posy, once I'm closer to complete :D The onscreen graphics I currently have were laboriously extracted from the video above.
https://github.com/Rezmason/birefringence-lcd/blob/main/asse...
See also: https://www.youtube.com/watch?v=COCnckzHHLk&t=154s
And the patent: https://patents.google.com/patent/US5745200A
