Smart LCD birght/dim...
matt at manjos.com
Sat Apr 12 14:23:35 CEST 2008
I had a Compaq iPaq that did this via a little photodiode and it was
implemented well, but there are some times when you want a brighter
screen in the dark / darker screen in the daytime, so you're still
digging through menus.
On Sat, Apr 12, 2008 at 6:52 AM, Ortwin Regel <ortwin at gmail.com> wrote:
> Exactly my thoughts: This sounds way too complicated to actually be
> useful. I'd rather adjust my brightness manually.
> On 4/12/08, Nick Guenther <kousue at gmail.com> wrote:
> > On Fri, Apr 11, 2008 at 8:50 PM, "Marco Trevisan (Treviño)"
> > <mail at 3v1n0.net> wrote:
> > > Since Freerunner won't have an hardware light sensor to set its LCD
> > > brightness, I got some ideas about smartly changing the luminance of the
> > > GTA02 screen to save its battery (still with an unknown life time :/).
> > > Of course they aren't and never will be precise as an hardware sensor is,
> > > but it's the only thing we have:
> > >
> > > 1) Setting the brightness following the hour of the day: also if the
> > phone
> > > can't know if it's sunny or cloudy, neither if you're indoor or outdoor,
> > > it's clear that just knowing the hour of the day, the date and your
> > latitude
> > > (to be set once via GPS) the phone can easily know when the sun will rise
> > > and set, and so it will be possible increasing or reducing the LCD
> > > brightness.
> > > Also if you're indoor, I guess that when the sun is "gone" you won't need
> > > so much luminance...
> > >
> > > 2) Using personal profiles that follow your habits: you could define, for
> > > each hour of each week day the "presumed" luminance, using something like
> > a
> > > calendar. I mean, if on working-days I generally stay indoor every day
> > from
> > > 8:30 to 13:00 and from 15:00 to the 19:00 I figure that on these intervals
> > I
> > > don't need all the LCD power, so I'll set in my "calendar" that on such
> > > interval I'll be indoor...
> > > I guess that many of you would follow a routine durning the week, why
> > don't
> > > educate your phone for it!?
> > >
> > > 3) Setting the luminance following the weather. Of course I've no light
> > > sensors, neither a barometer :P, but if I've a working connection
> > available
> > > I could use the weather data downloaded every few minutes (60, for
> > example)
> > > from internet to change my screen brightness (of course merging these
> > > informations with points 1 and 2)
> > >
> > > What do you think about them?
> > > I do think that they are really simple to implement, and that also if
> > they
> > > won't guarantee a perferct result, they could be a "smart" workaround.
> > >
> > > --
> > > Treviño's World - Life and Linux
> > > http://www.3v1n0.net/
> > >
> > Or you could just... dim it after a few seconds and go blank after a
> > minute like every other phone does. If we try to solve this by complex
> > heuristics we're
> > 1) going to get it wrong
> > 2) going to end up wasting more battery in doing the computations than
> > we save by them.
> > -Nick
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