I asked this question a few days ago:
How exactly do the Linux display device files work?
It has been put on hold as 'too broad'. However, I made an edit at the end, acknowledging that the question may be too broad and instead asking for a reference to external resources that would help to explain the topic (which I have had trouble finding). Surely the revised question isn't too broad? If so, what can I do to make the question acceptable?