I want to get rid of the discussion about the sun screen at home (Uitvalscherm).
What is open and what is closed?
It is simple with a roller shutter or curtain.
I would say up is open and close is down.
My wife disagrees.
Listen to your wife 
You both seem to agree up is up and down is down. So in your lovelace frontend make sure you use those words. It will make your wife feel incredibly super happy.
By the way, sunscreen is the lotion. The word you are looking for is awning
My frontend:
For control through Google Home, I created routines for “Zonnescherm omhoog” en “Zonnescherm omlaag”.