this morning I ask Good display about partial refresh problem,
Here there answer:
"epaper display should not be used outdoors because of its diaphragm limit.
So this year we introduced new technology, We've got the patent. The new technology epaper display can be used outside and will not be hurt by ultraviolet rays.
New products will be introduced by the end of the year.
In addition, the 4.2 inch epaper display not support partial refresh because its chip. Do you consider using 4.3 inch epaper display?
It's parallel interface display and partial refresh is 300ms, Pls find attached datasheet for your reference."
Well, I ask them to understand how some people get goo result with partial update..