Thread: Clara HD How to permanently disable the backlight? (alternate firmware? config file? hack?)
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Old 05-12-2020, 08:05 AM   #12
davidfor
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Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos
Quote:
Originally Posted by imno007 View Post
Where you intending that as a for or against? It did seem to LCD screens were bad, but, nothing really about e-ink. It did refer to a study that stated:

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The absence of differences between E-ink and paper suggests that, concerning visual fatigue, the E-ink is indeed very similar to the paper.
The study does say they adjusted the light levels for comfort. And interestingly:

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We then measured the total amount of light (emitted plus reflected) by each device with a digital luminance meter (Konica Minolta LS-110; Tokyo, Japan) placed at 60 cm from the reading device at the exact lighting settings and eye level used during data acquisition. The Michelson ratios were as follows: Kindle Fire HD (LCD): 0,96 (Lmax: 27,77 cd/m2; Lmin: 0,58 cd/m2); Kindle Paperwhite (E-ink): 0,77 (Lmax: 11,27 cd/m2; Lmin: 1,44 cd/m2); Paper book: 0,90 (Lmax: 16,42 cd/m2; Lmin: 0,86 cd/m2).
Apparently paper books are brighter than a Paperwhite.
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