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cnorlander / USB2VFD-Deck

A desktop notification panel based on the AIDA64 compatible 40x2 USB2VFD serial display.
GNU General Public License v3.0
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brightness adjust #1

Open eadmaster opened 4 months ago

eadmaster commented 4 months ago

Do you know if is it possible to adjust/reduce brightness on these displays?

(I guess some specific serial cmd is required)

EDIT: according to the manual here on page 32, there is a "Set Brightness" command with hex FE 99

eadmaster commented 4 months ago

update: i've rewritten a bit of the example logic using a thread to keep the screen updated, however the aforementioned set brightness command does not work, if you have some suggestion please let me know...

cnorlander commented 1 month ago

@eadmaster Yeah I suspect this is not possible due to the nature of the VFD display. Seems the LK402-25 has this command as it was intended for LCD but I suspect due to the higher voltage requirements for a VFD (30v+) they likely decided to drive the display off another chip rather than using the one integrated into the LK402-25 meaning its likely not adjustable.