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Subject: Re: Broken LCD :(
From: David Litchman (Davel23_at_rcn.com)
Date: 2004-03-21


To the best of my understanding, using inverse display would make no
difference in power consumption. In an LCD, there are tiny little crystals
which are suspended in liquid (hence the name). If a particular cell (or
pixel, if you prefer) is on, then a charge is passed through it which
aligns the crystals in such a way as to allow light through. If it's off,
then the charge is used to align the crystals so that light will not pass
through. So regardless of whether or not the pixel is illuminated the same
amount of power is used. At least, that's how I understand it. If anyone
knows better please feel free to correct me.

At 05:48 PM 3/20/2004 -0500, you wrote:
>Are you sure that inverse screen uses less power? That really makes no sense
>to me, though I'm not saying you're wrong. I'm just wondering. Instead of
>having to display color on part of the screen, you have to display color on
>all the screen and ignore a few pixels. What's the standard, black or
>white(green)?
>
>
>"Rocker" <rocker_at_shaw.ca> wrote in message
>news:01a201c40ecb$38ed4400$6a2e4218_at_k6kzw66eczyxgw...
>Nice idea. I have gone and adjusted all the LCd settings that reduce the
>battery strain. For example: Inverse screen. The white text with black
>background uses lest power to display. hide scroll bars and hide icons
>etc...rocker
>
>----- Original Message -----
>From: "Bio Hazard" <BioHazard_at_bak.rr.com>
>To: "Rockbox development" <rockbox_at_cool.haxx.se>
>Sent: Saturday, March 20, 2004 3:15 PM
>Subject: Re: Broken LCD :(
>
>
>shouldnt there be a "blind" option somewhere that will turn off the LCD? im
>sure it would save battery power for blind users right?
>
>
>----- Original Message -----
>From: "Rocker" <rocker_at_shaw.ca>
>To: "Rockbox development" <rockbox_at_cool.haxx.se>
>Sent: Saturday, March 20, 2004 8:41 AM
>Subject: Re: Broken LCD :(
>
>
> > Score another one for the voice UI! Broken LCD? No problem eh?
> >
> > Cheers!
> >
> > ----- Original Message -----
> > From: "Touillaud Nicolas" <Nicolas.Touillaud_at_fr.thalesgroup.com>
> > To: <ryan+list_at_presslab.us>; "Rockbox development" <rockbox_at_cool.haxx.se>
> > Sent: Friday, March 19, 2004 9:18 AM
> > Subject: RE: Broken LCD :(
> >
> >
> > Hi !
> > Is your recorder is 2 month old and out of warranty ?
> > The Talkbox is a good start, but not fully fonctionnal at this time. If it
> > works for blind people, it will work for dead LCD.
> > If I understood correctly, you can manage to use the talking version to
> > navigate through the menus, the values are not talked yet but you can play
> > with the contrast once you reach the correct entry for sure.
> >
> > Good luck !
> > Nicolas
> >
> > -----Message d'origine-----
> > De : Ryan Press [mailto:ryan+list_at_presslab.us]
> > Envoyé : vendredi 19 mars 2004 17:03
> > À : rockbox_at_cool.haxx.se
> > Objet : Broken LCD :(
> >
> > Well my two-month-old recorder 2.0 from Amazon died the other day. More
> > specifically the unit powers up but the LCD does not show anything.
> > Sometimes I can get it to display vertical bars for a moment. It still
> > plays whatever was in my playlist just fine.
> >
> > One thing I tried was to change the contrast as in the FAQ. I have a
>pretty
> > new version from the CVS and I'm not sure if the FAQ button sequence
>applies
> > to the later versions. Can someone confirm this?
> >
> > So I've decided to keep it as it still makes a nifty USB 2 hard drive. I
> > was wondering if anyone on the list might have a recorder with a good LCD
> > but a broken something-else that I could buy. Also I've read in the
> > archives something about TalkBox - will this really be feasible to use
>with
> > a dead LCD?
> >
> > I've seen in the archives also some talk of a replacement LCD supplier in
> > the UK. Not positive if it would fix the problem, and it seemed a little
> > pricey. I'm in the US so shipping and payment would be a hassle.
> >
> > Ryan
> >
> >
> >
> > _______________________________________________
> > http://cool.haxx.se/mailman/listinfo/rockbox
> > _______________________________________________
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> >
> >
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