The phrase "to refresh the screen" means to update or reload the information displayed on a computer or electronic device so that it shows the most recent or current content. Full definition
BTW I simply * love * it when the kindle has to stop and refresh the screen with ink. (goodereader.com)
Older OLED TVs had some input - lag problems, making it harder for them to refresh the screen in time for fast - action sports or video games. (tomsguide.com)
Screen refreshes (when the screen flashes black for a second in order to wipe and redraw the E Ink screen) happen less frequently, thanks to a new software trick that only refreshes the screen when the Kindle thinks it's required. (pcworld.com)