Quote:
Originally Posted by MGlitch
Scrolling can work on e-ink, but you'd still use up the battery faster or make it so the difference between scrolling and paging was moot.
Eink only really draws power when the screen refreshes, which it would need to every time you scroll. So lets say you read 10 lines of text and then scroll and repeat. My H2O has about 31 lines of text, however I use what most would consider faily small font size, and I've made my line spacing and margins optimized for getting the most lines per screen, so lets call it 25 lines. To read the same amount of text, you're refreshing the screen 2.5x as much as I am.
The issue isn't about smooth scrolling, though if it were -true- scrolling where you bring a line up and each part of that line must pass through every pixel between point a and b, then you're looking at even more battery drain. My thoughts are for a scrolling system that moves the text in chunks, so you have lines 1-10, when you scroll line 1 goes away and line 2 takes its place as a block of text.
As to scrolling on LCD, I can't say. I don't read books on my iPhone, nor any tablet I've used. I dislike using LCD for extended reading.
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I think you probably have a good point about battery life with e-ink. When I think of scrolling it's either line oriented as it would be on an MS-Dos system, or pixel oriented as on a GUI system, which they all are today.
Obviously pixel oriented scrolling would be a huge power waster. It would mean redrawing the entire screen a dozen or so times for each line scrolled.
Line oriented scrolling wouldn't be quite so bad but would be pretty ugly. I recall some of the Palm Pilot apps offering line oriented scrolling as an option and I never understood why.
So yeah, that probably would make scrolling unrealistic on e-ink.
Barry