Screen Size and Battery Consumption

[yagiz]

Hi,

While thinking about different e-Paper readers, a question came to my mind regarding the screen size and the battery consumption. And I know we have some experts here so I wanted to quickly pick your brains about this.

Let's say we have two e-Paper readers: One of 5" screen the other one 9". So if I read the same book on both using the same font size, the book will have considerably fewer pages on the larger device. As most (if not all) of the constructors publish their benchmarks based on page-turns, is it fair to say that to read a given book at a given pace, a larger e-Paper reader will consume less power? Or the extra power used for the larger display makes the difference negligible?

[LDBoblo]

Originally Posted by yagiz

Hi,

While thinking about the different e-Paper readers, a question came to my mind regarding the screen size and the battery consumption. And I know we have some experts here so I wanted to quickly pick your brains about this.

Let's say we have two e-Paper readers: One of 5" screen the other one 9". So if I read the same book on both using the same font size, the book will have considerably fewer pages on the larger device. As most (if not all) of the constructors publish their benchmarks based on page-turns, is it fair to say that to read a given book at a given pace, a larger e-Paper reader will consume less power? Or the extra power used for the larger display makes the difference negligible?

If 2 devices are accurately measured as generating the same number of continuous refreshes on a charge, then yes the larger device allows you to read more for a given font size.

[stustaff]

Originally Posted by LDBoblo

If 2 devices are accurately measured as generating the same number of continuous refreshes on a charge, then yes the larger device allows you to read more for a given font size.

But is it using more electric? so if they had the same battery size which would die first?

[HarryT]

Larger screen do use more power, certainly, but a physically larger device has more room in it for a larger battery, of course.

[Shaggy]

It's an interesting theoretical question, but I don't think it really matters. You're almost guaranteed to never see two readers with different screen sizes, but otherwise identical. In other words, the power consumption of the different devices is going to have more variables in it than just the screen size. Other hardware differences, features, etc, will probably make the kind of comparison you're talking about less useful.

[yagiz]

I understand. Thanks for the comments!