Forma vs Oasis, better contrast?

[ersott]

Well, that’s the question, which of this devices has better screen? Contrast is most important for me

[ottischwenk]

Originally Posted by ersott

Well, that’s the question, which of this devices has better screen? Contrast is most important for me

I don't know the Oasis, but I do know that it uses a glass screen, while the Forma relies on Mobius technology.
All my devices with glass screen have better contrast than those with Mobius.
But the Forma has other advantages like weight, no (books) dependence on Amazon etc.

[hobnail]

I'd say that the Oasis has slightly better contrast, but it's not enough to outweigh the advantages of the Kobo. The user interface of the Kobo is far superior to the Kindle's. The Kobo is also definitely easier to hold with the side slightly angled up where the page turn buttons are. The metal of the Kindle makes it cold and unpleasant for me to hold (or maybe it's the glass since I do have a cover on it). And the additional screen size on the Kobo, even though it's not a lot, definitely makes a difference.

I still buy my books from Amazon and use Calibre to convert them to epub.

[ersott]

Thanks for the answer, I’ll buy a forma and Iwill see

[DNSB]

A Mobius screen has a plastic substrate which is behind the opaque eInk display (if you look at a cross-section of an eInk display, the top electrode is labelled as transparent while the bottom electrode is not and the eInk capsules/cups are themselves opaque). So a claim that having a Mobius display could affect display contrast is a bit hard to understand. Much like @otisschwenk's agreement that Mobius displays are lumpy, the claim seems to lack any visible means of support. This is saying nothing of the layers above the display (touch, protective top layer, etc.) which can affect the display.

Having a Forma myself and having compared it with an Oasis, I did not notice any difference in the display contrast with or without the frontlight on.

As to why Mobius displays are superior, check this video of a Forma undergoing a twist test.

[ottischwenk]

Originally Posted by DNSB

A Mobius screen has a plastic substrate which is behind the opaque eInk display (if you look at a cross-section of an eInk display, the top electrode is labelled as transparent while the bottom electrode is not and the eInk capsules/cups are themselves opaque). So a claim that having a Mobius display could affect display contrast is a bit hard to understand. Much like @otisschwenk's agreement that Mobius displays are lumpy, the claim seems to lack any visible means of support. This is saying nothing of the layers above the display (touch, protective top layer, etc.) which can affect the display.

Only an idiot would connect a Mobius display to an upper glass layer, which then needs the same support in terms of stability as a glass display.
Mobius displays are always produced with plastic outer layers, which are far inferior to glass in terms of transparency.
And if you claim that your Forma is as sharp and contrasty as your Kindle, then you're not seeing well, or .....

[John F]

What are some ereaders with an upoer glass disp!ay?

[JSWolf]

One thing to note. The Oasis suffers from the same issue that's plagued Kindle's for a very long time. The problem is that Kindle do not dither images all that well. Kobo does a better job at dithering and you get more detail. Amazon just doesn't care to fix their poor dithering.

Kobo did improve the dithering at some point.

[JSWolf]

Originally Posted by John F

What are some ereaders with an upoer glass disp!ay?

I think it's something ottischwenk made up because he doesn't want us to know that he doesn't understand about Mobious displays.

[JSWolf]

Originally Posted by DNSB

Having a Forma myself and having compared it with an Oasis, I did not notice any difference in the display contrast with or without the frontlight on.

As to why Mobius displays are superior, check this video of a Forma undergoing a twist test.

GoodEReader compared the Forma to the Oasis and they did say that the background of the Forma was slightly lighter.

[Pajamaman]

Originally Posted by JSWolf

GoodEReader compared the Forma to the Oasis and they did say that the background of the Forma was slightly lighter.

So you think it's not true, and that forma background is not lighter?

[John F]

Originally Posted by JSWolf

I think it's something ottischwenk made up because he doesn't want us to know that he doesn't understand about Mobious displays.

Regardless, I would still like some examples of ereaders with a glass screen, i.e. the upper screen, i.e. not the substrate.

Thanks

[DNSB]

Originally Posted by ottischwenk

Only an idiot would connect a Mobius display to an upper glass layer, which then needs the same support in terms of stability as a glass display.
Mobius displays are always produced with plastic outer layers, which are far inferior to glass in terms of transparency.
And if you claim that your Forma is as sharp and contrasty as your Kindle, then you're not seeing well, or .....

@Otisschwenk, try to maintain at least minimal contact with reality. Or possibly post a link to eInk's site supporting your claim. As near as I can tell from what I have read on eInk's site and elsewhere, the outer layers have nothing to do with the substrate.

To quote from eInk's site:

For applications such as cell phones or hand-held devices, the use of a plastic TFT can be augmented by a layer of unbreakable glass on the front of the display to give stiffness to a device which requires significant touch interaction, but still provides an increased ruggedness. In these types of devices the TFT itself is often the component that fails when dropped, rather than the top plane glass. A plastic TFT can significantly reduce display failure due to those drops.

To quote from a review of the Boox Note 3:

The Onyx Boox Note 3 features an E INK Mobius touchscreen display with a resolution of 1872×1404 with 227 PPI. The screen is completely flush with the bezel and is protected by a layer of glass

To quote from Boox's site:

The Mobius flexible screen with AG glass flat cover-lens can render a comfortable writing feeling and glare-free view.

There multiple other spots on eInk's site where the same type of statements are made and several manufacturer's whose sites claim a glass front layer on an eInk Mobius screen. I can't find one that matches your claim that a Mobius display needs to be all plastic.

To quote from Mythbusters:

[j.p.s]

Originally Posted by JSWolf

One thing to note. The Oasis suffers from the same issue that's plagued Kindle's for a very long time. The problem is that Kindle do not dither images all that well. Kobo does a better job at dithering and you get more detail. Amazon just doesn't care to fix their poor dithering.

There you go trying to pass off opinion as objective fact again.

[ottischwenk]

Originally Posted by JSWolf

I think it's something ottischwenk made up because he doesn't want us to know that he doesn't understand about Mobious displays.

How many times do I have to say that no one can look directly at a Mobius module.
You can only see the outer layers of the screen, the ones in front of the module, and these are less transparent on a Mobius screen than on a glass screen.

In fact, there's a reason why Mobius technology is only used on large screens, and has recently been replaced by glass at 10.3 inches due to new mounting concepts.

But of course, someone who wants to bend their devices must prefer Mobius.

BTW: even Kobo uses Mobius only on the Forma, whose only advantage over the 7.8 inchers is its light weight.