Hello, As it says in the title, I would like to know if the light entering a twisted nematic liquid crystal display experiences any kind of phase shift specifically when applying a voltage to manipulate the polarisation of the light. If it is the case, could someone point me towards any articles that describe this? I have had a look myself on Google etc., though most of the papers that seem related are only accessible through membership. Also, if anyone knows the sort of maths behind it e.g. applying x amount of voltage/polarisation induces y amount of phase shift, whether it applies for a specific TN LCD device or in general, that would be great. Thank you.