STN LCD 20x4 has slow response time ~200ms. Is these normal?

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i testing blue stn lcd 20x4 (2004a board model) i2c.
when updating character (only 1 character), saw slow motion of pixels rise , fall.
is these normal these kind of lcd?

video:
https://youtu.be/awodszquuxu

from datasheet,
https://www.beta-estore.com/download/rk/rk-10290_410.pdf
tr , tf 0.2 us. think ~200ms.

lcd displays slow, depends on:

1. definition of slow?
2. can show sketch?

if using delays or serial.print commands in loop, slow down lcd.print.


Arduino Forum > Using Arduino > Displays > STN LCD 20x4 has slow response time ~200ms. Is these normal?


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