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#46 |
Sir Penguin of Edinburgh
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Join Date: Apr 2007
Location: DC Metro area
Device: Shake a stick plus 1
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#47 |
Groupie
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Join Date: Nov 2019
Location: Wuppertal, Germany
Device: Tolino Vision 5, kindle Oasis (2019), Pocketbook Color, Boox Nova 3
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#48 |
meles meles
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Join Date: May 2008
Location: Persepolis
Device: Pocketbook InkPad 3
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I noticed a few more technical differences:
- battery is now 2900 mAh, compared to 1900 of InkPad 3 (pro). - Linux kernel upgrade from 3.0.35 to 3.10.65 They didn't change the system to something relatively power hungry like Android. So does the color screen use more? Will the battery last even longer in black&racist mode? |
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#49 |
the rook, bossing Never.
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Join Date: Jun 2017
Location: Ireland
Device: Both Kinds: epub based makes and Kindle
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The colour is only a filter. The screen is really a monochrome eink. Processing colour and mono images might take a little more power, but not actual display.
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#50 |
the rook, bossing Never.
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Join Date: Jun 2017
Location: Ireland
Device: Both Kinds: epub based makes and Kindle
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#51 | |
Connoisseur
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Join Date: Dec 2020
Device: Kindle Paperwhite 3
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Quote:
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#52 |
Wizard
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Join Date: Sep 2012
Location: Salzburg AT
Device: Boox 5, Likebook 4, Tolino 7
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#53 | |
Connoisseur
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Karma: 4569040
Join Date: Dec 2020
Device: Kindle Paperwhite 3
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Quote:
I don't see the relevance, however, of correcting this. Yes, it's technically wrong, but the end result is the same. Is there a specific reason that you point this out? Is there some significant difference between a frontlight and a backlight for the reader? In my experience the light emanates just as strongly from the frontlight of my e-ink devices as my backlit computer screen or my phone. This is based on activating the lights in a dark room to compare how they light up their surroundings. |
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#54 |
Wizard
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Join Date: Sep 2012
Location: Salzburg AT
Device: Boox 5, Likebook 4, Tolino 7
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Yes, with the backlight the light source shines (color-filtered) directly into the eyes, with the frontlight you only see the reflection of the light - that is an enormous qualitative difference.
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#55 | |
Connoisseur
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Join Date: Dec 2020
Device: Kindle Paperwhite 3
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Quote:
Still, it would be interesting to read research on this topic. Maybe that is a bit much to hope for. The research I have seen seems to conclude that LCD screens are no more tiring than e-ink, which is a ridiculous conclusion. (If, however, they tested this with the frontlight on and the above description holds true it might actually be a valid result.) |
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#56 |
Wizard
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Join Date: Sep 2012
Location: Salzburg AT
Device: Boox 5, Likebook 4, Tolino 7
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A foto - left Boox Note Air, right a 10 inch tablet.
The light intensity is set so that both devices appear equally bright. Both devices are equidistant from the white wall. |
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#57 | |
Connoisseur
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Karma: 4569040
Join Date: Dec 2020
Device: Kindle Paperwhite 3
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Quote:
For instance, some claim that programs that filter blue light (f.lux, redshift, etc.) help with eye strain and sleep issues, while others are adamant it makes no difference whatever. Same thing with frontlight vs backlight. But even assuming that the light is equal in effect at the same amount, your experiment here shows that at perceived levels of equal light the quantity of light emitted from a frontlight would be smaller. |
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#58 | |
Wizard
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Karma: 2526472
Join Date: Sep 2012
Location: Salzburg AT
Device: Boox 5, Likebook 4, Tolino 7
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Quote:
If you look at a tablet, you are looking directly into the light source. |
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#59 | |
Interested Bystander
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Join Date: Jun 2008
Device: Note 4, Kobo One
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Quote:
A light pointed in your eyes is the same as a light from behind you pointed at a mirror at half the distance as the original source. Photons either enter your eyes or they don't. |
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#60 |
the rook, bossing Never.
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Join Date: Jun 2017
Location: Ireland
Device: Both Kinds: epub based makes and Kindle
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The issue with OLED and LCD seems to be people having the brightness set for outdoors and then not turning it to minimum. Set an old paperback under your night time reading light. Reduce the phone/tablet to same brightness as the page. Some can be turned cream/yellow/amber. Then there is no deleterious effect to your eyes.
Even auto light level screens are rubbish compared to manual. The issue is that auto, or manual, the screen doesn't have the same brightness as a book in the same lighting. An eink with the front light off is like a paperback, better than a 30 year old one, it is always matching the ambient light. An eink with the front LEDs turned up high is as bad or worse than an OLED or LCD backlight. It's LED light ignoring the ambient level. Also though many phone, laptop and tablet screen are shiny. You unconsciously focus on moving reflections and that causes a headache. Studies on CRTs facing windows with traffic or open plan offices showed this over 30 years ago. Have screen sideways to a window and never facing where people walk in an open plan office. Last edited by Quoth; 02-20-2021 at 04:30 PM. |
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