DM42 usable for just a user?!

General discussion about calculators, Swiss Micros or otherwise
grsbanks
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Joined: Tue Apr 25, 2017 9:23 am
Location: Preston, Lancs, UK
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Re: DM42 usable for just a user?!

Post by grsbanks » Sun Feb 03, 2019 9:08 pm

Walter wrote:
Sat Feb 02, 2019 1:42 pm
Didn't some people claim the screen needs no power at all in ground state (discussing OFFIMG many months ago)? Or is my memory fading?
Your memory is not fading and I was one of the people making that claim.

If it were possible to disconnect the LCD physically from the circuitry immediately after the DM42 is powered down, the remanent image would persist a lot longer. What actually happens is, some of the charge within the LCD leaks out to the rest of the DM42 -- we're probably talking picoamperes here -- but it's enough to make that image fade away after maybe 1/2 hour.
Not SwissMicros staff, just an enthusiast.

gomefun2
Posts: 13
Joined: Sun May 06, 2018 1:45 am

Re: DM42 usable for just a user?!

Post by gomefun2 » Mon Feb 04, 2019 12:23 am

DA74254 wrote:
Sat Feb 02, 2019 8:27 am
gomefun2 wrote:
Sat Feb 02, 2019 5:18 am
... e-ink screen saver. ...


1. The display is e-ink (I think?).
No it's not. It's Sharp low power memory LCD
https://www.sharpsma.com/products?sharp ... parallel=0
Thanks for the clarification

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