Register Guidelines E-Books Search Today's Posts Mark Forums Read

Go Back   MobileRead Forums > E-Book Readers > Amazon Kindle

Notices

Reply
 
Thread Tools Search this Thread
Old 09-24-2020, 01:03 PM   #1
Luffy
Wizard
Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.
 
Luffy's Avatar
 
Posts: 4,346
Karma: 427155312
Join Date: Aug 2014
Location: Mauritius
Device: Kindle Paperwhite 4
What uses more juice, default mode or dark mode?

Hope someone can enlighten me on the matter.
Luffy is offline   Reply With Quote
Old 09-24-2020, 02:58 PM   #2
j.p.s
Wizard
j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.
 
Posts: 3,553
Karma: 62562809
Join Date: Apr 2011
Device: pb360
Quote:
Originally Posted by Luffy View Post
Hope someone can enlighten me on the matter.
Should be the same.
j.p.s is offline   Reply With Quote
Advert
Old 09-24-2020, 02:59 PM   #3
Luffy
Wizard
Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.
 
Luffy's Avatar
 
Posts: 4,346
Karma: 427155312
Join Date: Aug 2014
Location: Mauritius
Device: Kindle Paperwhite 4
Quote:
Originally Posted by j.p.s View Post
Should be the same.
Thanks. Others are free to chime in.
Luffy is offline   Reply With Quote
Old 09-24-2020, 03:15 PM   #4
hobnail
Running with scissors
hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.
 
Posts: 1,048
Karma: 12135966
Join Date: Nov 2019
Device: none
I would guess dark mode would since it has to turn on more pixels, and then only if you're turning pages at a furious rate. On the other hand I have page refresh set for every page so it wouldn't make any difference for me.
hobnail is offline   Reply With Quote
Old 09-24-2020, 03:19 PM   #5
j.p.s
Wizard
j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.
 
Posts: 3,553
Karma: 62562809
Join Date: Apr 2011
Device: pb360
Quote:
Originally Posted by hobnail View Post
I would guess dark mode would since it has to turn on more pixels, and then only if you're turning pages at a furious rate. On the other hand I have page refresh set for every page so it wouldn't make any difference for me.
The number of pixels changed is the same for either mode. The "pixels" are a bunch of half-white half-black spheres whose orientations are changed to control the shade of gray.

Last edited by j.p.s; 09-24-2020 at 03:22 PM.
j.p.s is offline   Reply With Quote
Advert
Old 09-24-2020, 03:24 PM   #6
Luffy
Wizard
Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.
 
Luffy's Avatar
 
Posts: 4,346
Karma: 427155312
Join Date: Aug 2014
Location: Mauritius
Device: Kindle Paperwhite 4
Quote:
Originally Posted by hobnail View Post
I would guess dark mode would since it has to turn on more pixels, and then only if you're turning pages at a furious rate. On the other hand I have page refresh set for every page so it wouldn't make any difference for me.
Well, I hope to get more constructive views before making up my mind.
Luffy is offline   Reply With Quote
Old 09-24-2020, 03:47 PM   #7
hobnail
Running with scissors
hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.
 
Posts: 1,048
Karma: 12135966
Join Date: Nov 2019
Device: none
Quote:
Originally Posted by Luffy View Post
Well, I hope to get more constructive views before making up my mind.
The edges of the letters may change depending on the mode. This is certainly true with print and crt, lcd, etc. due to bleed, but I don't know if it's an issue with e-ink. Back in the days of crt monitors my favorite font looked great with white text on a black background but changing it to black on white made it horrible. CRTs no doubt have a lot more edge bleed than LCDs and e-ink.
hobnail is offline   Reply With Quote
Old 09-24-2020, 03:51 PM   #8
j.p.s
Wizard
j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.
 
Posts: 3,553
Karma: 62562809
Join Date: Apr 2011
Device: pb360
Quote:
Originally Posted by hobnail View Post
The edges of the letters may change depending on the mode. This is certainly true with print and crt, lcd, etc. due to bleed, but I don't know if it's an issue with e-ink. Back in the days of crt monitors my favorite font looked great with white text on a black background but changing it to black on white made it horrible. CRTs no doubt have a lot more edge bleed than LCDs and e-ink.
Those are appearance issues that have nothing to do with power use for e-ink devices.
j.p.s is offline   Reply With Quote
Old 09-24-2020, 03:59 PM   #9
hobnail
Running with scissors
hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.
 
Posts: 1,048
Karma: 12135966
Join Date: Nov 2019
Device: none
Quote:
Originally Posted by j.p.s View Post
Those are appearance issues that have nothing to do with power use for e-ink devices.
Agreed; I thought I'd point it out so that there's more to consider in the long run.
hobnail is offline   Reply With Quote
Old 09-24-2020, 04:52 PM   #10
JSWolf
Resident Curmudgeon
JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.
 
JSWolf's Avatar
 
Posts: 62,728
Karma: 102416178
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Aura H2O, PRS-650, PRS-T1, nook STR, iPad 4, iPhone SE 2020, PW3
It takes more power to switch modes. But once switched, it should take the same as it would be the same changes after that. But there is one difference that I've found. I've found that in night (dark) mode that the light needs to be at a higher level then it does iday (normal) mode. That will take more power.
JSWolf is offline   Reply With Quote
Old 09-24-2020, 04:57 PM   #11
DuckieTigger
Wizard
DuckieTigger ought to be getting tired of karma fortunes by now.DuckieTigger ought to be getting tired of karma fortunes by now.DuckieTigger ought to be getting tired of karma fortunes by now.DuckieTigger ought to be getting tired of karma fortunes by now.DuckieTigger ought to be getting tired of karma fortunes by now.DuckieTigger ought to be getting tired of karma fortunes by now.DuckieTigger ought to be getting tired of karma fortunes by now.DuckieTigger ought to be getting tired of karma fortunes by now.DuckieTigger ought to be getting tired of karma fortunes by now.DuckieTigger ought to be getting tired of karma fortunes by now.DuckieTigger ought to be getting tired of karma fortunes by now.
 
DuckieTigger's Avatar
 
Posts: 4,362
Karma: 241665107
Join Date: Dec 2011
Location: USA
Device: Oasis 2, PW3
I would say dark mode uses more power when reading in low or no light, because it needs more front light to create enough contrast. Normal only needs enough light to make the white background visible.

I concur with Jon in last post. Also the front light is always on on Oasis, cannot be turned off in dark mode.
DuckieTigger is offline   Reply With Quote
Old 09-24-2020, 05:18 PM   #12
Luffy
Wizard
Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.Luffy ought to be getting tired of karma fortunes by now.
 
Luffy's Avatar
 
Posts: 4,346
Karma: 427155312
Join Date: Aug 2014
Location: Mauritius
Device: Kindle Paperwhite 4
I've got a PW4. I think I've been dealt a good hand since I never read in an unlit room.
Luffy is offline   Reply With Quote
Old 09-24-2020, 05:38 PM   #13
j.p.s
Wizard
j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.j.p.s ought to be getting tired of karma fortunes by now.
 
Posts: 3,553
Karma: 62562809
Join Date: Apr 2011
Device: pb360
Quote:
Originally Posted by JSWolf View Post
It takes more power to switch modes. But once switched, it should take the same as it would be the same changes after that. But there is one difference that I've found. I've found that in night (dark) mode that the light needs to be at a higher level then it does iday (normal) mode. That will take more power.
Quote:
Originally Posted by DuckieTigger View Post
I would say dark mode uses more power when reading in low or no light, because it needs more front light to create enough contrast. Normal only needs enough light to make the white background visible.

I concur with Jon in last post. Also the front light is always on on Oasis, cannot be turned off in dark mode.
Switching modes uses more power, but that has nothing to do with power use in a mode.

For some people, light setting #1 is too bright for reading in a dark room. For them, dark mode would not use more power unless Setting #1 is too dim in dark mode.

I agree that the screen is darker in dark mode and might require setting the light higher.

I measured Voyage battery drain versus light level a couple of years ago and it was pretty much impossible to tell any difference between levels 1 - 6. I'm sure the drain from the light is more than 6 times greater for level 6 than for level 1, but all the other things draining the battery on the Voyage just swamp them out.

https://www.mobileread.com/forums/sh...d.php?t=293683

The KOA2 light draws more power than the Voyage light, but I bet the difference in the first 4 levels is tiny compared to all the other drains.

Almost three years ago, I compared Voyage and KOA2 brightness at many light settings in a dark room, with the KOA2 in both mormal and dark modes.

https://www.mobileread.com/forums/sh...d.php?t=292336
j.p.s is offline   Reply With Quote
Old 09-24-2020, 08:28 PM   #14
tomsem
Wizard
tomsem ought to be getting tired of karma fortunes by now.tomsem ought to be getting tired of karma fortunes by now.tomsem ought to be getting tired of karma fortunes by now.tomsem ought to be getting tired of karma fortunes by now.tomsem ought to be getting tired of karma fortunes by now.tomsem ought to be getting tired of karma fortunes by now.tomsem ought to be getting tired of karma fortunes by now.tomsem ought to be getting tired of karma fortunes by now.tomsem ought to be getting tired of karma fortunes by now.tomsem ought to be getting tired of karma fortunes by now.tomsem ought to be getting tired of karma fortunes by now.
 
Posts: 4,563
Karma: 13224309
Join Date: Apr 2009
Location: USA
Device: iPhone XS, Kindle Paperwhite, iPad mini
It seems we agree that only the front light intensity matters when it comes to power consumption.

On the Paperwhite (and I assume Oasis) it is worth noting that Dark and Light modes have independent front light settings.

In my case, Dark is set to a lower setting, so I’m ‘saving power’ when I use it. It’s higher for Light mode because in average light, I like the background to appear whiter, and when in Dark mode, I like the background to appear darker.

That said, I pay almost no attention to power consumption rate.
tomsem is offline   Reply With Quote
Old 09-24-2020, 09:47 PM   #15
hobnail
Running with scissors
hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.hobnail ought to be getting tired of karma fortunes by now.
 
Posts: 1,048
Karma: 12135966
Join Date: Nov 2019
Device: none
Quote:
Originally Posted by tomsem View Post
That said, I pay almost no attention to power consumption rate.
Maybe it matters if you're going backpacking on a long trek. In that case I'd look into a solar panel charger.
hobnail is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Calibre 4.10 night mode/dark mode likeaghost Calibre 11 05-03-2020 05:43 PM
Dark mode in linux dunhill Calibre 2 01-18-2020 01:14 PM
Dark mode guich Sigil 3 11-15-2019 06:33 AM
Dark mode with dark font? Darkenmal Calibre 12 11-04-2019 11:24 PM
issue when using dark mode sovre Amazon Kindle 9 08-22-2019 08:03 PM


All times are GMT -4. The time now is 03:56 AM.


MobileRead.com is a privately owned, operated and funded community.