Force full-screen refresh on e-ink monitors

eink_clean.ahk

#SingleInstance, force  ; Allow only one instance of this script to be running.
#Persistent ; To stop the script from exiting.

; Here, press F1 to trigger the black/white flash
F1::
    ; Source: https://superuser.com/questions/662264/i-would-like-to-make-the-screen-go-black-every-8-seconds-how
    Gui, Color, 000000
    Gui, Show, x-5000 y-20 w8000 h8000
    sleep  333
    Gui, Color, FFFFFF
    Gui, Show, x-5000 y-20 w8000 h8000
    sleep  333
    Gui, hide
return

Releated discussion - https://www.reddit.com/r/eink/comments/vigixb/forcing_a_fullscreen_refresh_on_booxdasung_eink/

Credits: user lililywww.

Related but Dasung specific ahk script to control contrast/light/display-mode: https://gitee.com/CastleWei/dasung-helper/blob/master/dasung_ahk_release.ahk

Additional note on the display-time of black/white image: in the proof-of-concept script, the display-time is set to be 333ms. Though,

• When using the e-ink monitor locally, 150ms is sufficient ;
• When connecting to a remote Windows machine through RDP, 300ms is good enough.