I have bought a Noritake itron vacuum fluorescent display, to use in an Arduino project. A menu with settings will be shown on the display, and the user can interact with it by using some buttons.
My question is:
When the user does not use the VFD display to change settings and such, should I program the Arduino to turn off the filaments inside the display? Should I leave the display on all the time?
I'm thinking that if I leave the filaments turned on all the time, with the individual segments not lit, I will get sputtering, and that's undesirable. Also, if I leave the display fully on (both filaments and individual segments) then in time, I will get either burn-in or fading of the phosphorus on the individual segments. I have it currently set that if the user doesn't interact with it for 10 seconds, then the whole display shuts off, including filaments, but I'm thinking the constant power cycling in the filaments will thermally stress them, leading to premature failure. How would be best to leave a VFD when not using it? What sort of idle time should I set, if 10 seconds is too short? An hour would work?