Which Colour device is best…. but?

[nana77]

I was really taken from the Pocketbook Color Note, too after having found a nice discount, ebay said it wouldn't had been shippen, because the seller already sold it (so the monies return after 3 days).

So the dopamine effect brought me, that I was certain to already have it on hands, to search for the second choice, which was the Pocketbook Inkpad 3 Color, and when I saw it at 230$...
I'll take my time to review it, at the moment I'm just impressed by the colours; it might be personal preferences, but I don't think a led/oled glare screen can be the same of a paper/pastel feel. I'm loving it so far.

I was wondering if, since the color filter layer has 150 dpi, and b/w 300, might be possible that on comics/graphic novels, the text inside a balloon can be actually at 300 dpi? While only the colors drops because the filterings?

Spoiler:

Ps: I don't mean chemicals (I'm strict coffee and tobacco): I was to mean "Dopamine manipulation and its role in effective advertising", "The Psychology of Dopamine Marketing"...

[JSWolf]

The best color device is the iPad Pro with an OLED screen.

[Quoth]

Originally Posted by JSWolf

The best color device is the iPad Pro with an OLED screen.

Walled garden
No loading apps direct.
Too shiny (though some models have a massively overpriced matte option)
About x4 too expensive.
No earphone socket.
Pencil about x3 to x5 more expensive than same thing for others.
No SD Card slot.

[JSWolf]

Originally Posted by Quoth

Walled garden
No loading apps direct.
Too shiny (though some models have a massively overpriced matte option)
About x4 too expensive.
No earphone socket.
Pencil about x3 to x5 more expensive than same thing for others.
No SD Card slot.

It's not a walled garden for reading.

[Quoth]

Originally Posted by nana77

I was wondering if, since the color filter layer has 150 dpi, and b/w 300, might be possible that on comics/graphic novels, the text inside a balloon can be actually at 300 dpi? While only the colors drops because the filterings?

No, the coloured dots are printed on the mono screen, so though it can be driven at 300 dpi for monochrome content, it's less resolution than a plain mono 300 dpi screen. Also at 300 dpi certain mono content gives false colour artefacts. If the page is colour, then likely any text is also 150 dpi. The 300 dpi mono mode only works at all because unlike LCD or OLED the printed CFA dots don't fill the native mono dots. This also results in the screen being brighter than eink Triton (where the CFA entirely covers pixels) and means it also can only do the less than 4080 colours as pastel shades (the 4096 total includes White, black, 14 grays and some indistinguishable shades).

Originally the Kindle was 167 dpi and the DX family are all 150 dpi, so it can look reasonable.

[Quoth]

Originally Posted by JSWolf

It's not a walled garden for reading.

So you can copy content to Apple Books or Apple music player via WiFi or BT or USB without iTunes/iCloud/Apple programs on Windows / Mac / Linux?

Didn't use to work. You could copy the files and the Apple apps will ignore them.

Apple is madly overpriced hype made in China.

[salamanderjuice]

Originally Posted by Quoth

No, the coloured dots are printed on the mono screen, so though it can be driven at 300 dpi for monochrome content, it's less resolution than a plain mono 300 dpi screen. Also at 300 dpi certain mono content gives false colour artefacts. If the page is colour, then likely any text is also 150 dpi. The 300 dpi mono mode only works at all because unlike LCD or OLED the printed CFA dots don't fill the native mono dots. This also results in the screen being brighter than eink Triton (where the CFA entirely covers pixels) and means it also can only do the less than 4080 colours as pastel shades (the 4096 total includes White, black, 14 grays and some indistinguishable shades).

Originally the Kindle was 167 dpi and the DX family are all 150 dpi, so it can look reasonable.

Sigh. This again. No, B&W text is at 300 DPI, B&W line-art is also 300 DPI. Colour is 150 DPI. Even on pages that mix both. You'd know this if you'd used a Kaleido 3 device for more than an hour and had good enough close vision eyesight to see it. There is some sharpness loss because of the colour layer on B&W content compared to the same non-colour screen but it is nowhere near the difference between 150 DPI and 300 DPI. To me it still looks better than the 200DPI devices I have.

It's really obvious if you just make an ePub that has one sentence in a color and the other be black and white. The pixellation of colour sentence really stands out and looks pretty similar to an older eReader.

Kobo's rainbow reduction mode at least doesn't make B&W content 150 DPI either.

[Quoth]

It is less sharp and has colour artefacts if you send 300 dpi data to a Kaledio screen. The coloured dots partially occluding each mono pixel are always there. It's delusional and dishonest marketing to claim it's a full 300 dpi like a mono panel.

It's physics. I have seen two models of Kaledio3. No way is it as good as any model 300 dpi mono eink. Even the PW4 is better.

It's certainly a lot better than a CFA that entirely covers the mono pixels, at the expense of making it pastel colours, but please stop claiming it's a real 300 dpi. It's not and Kaledio eink is darker, less sharp and potential for coloured lines with 300 dpi mono content than the same mono panels without the printed CFA.

The only way to never have colour artefacts on mono content is to treat it as 150 dpi.

[nana77]

Originally Posted by Quoth

So you can copy content to Apple Books or Apple music player via WiFi or BT or USB without iTunes/iCloud/Apple programs on Windows / Mac / Linux?

Didn't use to work. You could copy the files and the Apple apps will ignore them.

Apple is madly overpriced hype made in China.

The Oled's Samsung Galaxy Tab either didn't lowered much them price even after years, as second hand purchases.
And thought on Android there might be some more apps, but in there also there are the compromizes of "free" app but the advertisements, etc... I don't know much, but I guess something "clean" wouldn't be much free (clean as a linux program, something that does its job, and that's all).

Sure are personal preferences also, the person that sold me the device had fulffiled it within comics too; I'll learn more about because PDF, on Pocketbook, also seems not to have a smart zooming feature, but in general I do like the size and the easy way to read in it, comparing its simple way to have a read to the 13" Wacom Studio Pro (that still has nice screen and colors) is a no match imho (even within gnu/linux installed, I didn't found the smartiness of the e-ink devices experience, within).
10" would have been fine, but 8" on portrait maintains its lightheartedness way to read comics - imho.

@Quoth: thanks for the info, I'll look for, as for to understand them meanings.
I'll read books on inverted screen, btw (nice in there it doesn't need to reboot the device, to have it - but also: till the Forma works that would be my preference for books, and manga).
Edit: @salamanderjustice, thanks, too: I guess other than the real tecnical details a role is always being played by own perception. The pastel colors e.g. might look fainty near the paper version, or an OLED (@JSWolf, and might depend wich comics are compared to, also). But them along doesn't look bad, nor a compromize, in fact (imho again).

[salamanderjuice]

Originally Posted by Quoth

It is less sharp and has colour artefacts if you send 300 dpi data to a Kaledio screen. The coloured dots partially occluding each mono pixel are always there. It's delusional and dishonest marketing to claim it's a full 300 dpi like a mono panel.

It's physics. I have seen two models of Kaledio3. No way is it as good as any model 300 dpi mono eink. Even the PW4 is better.

It's certainly a lot better than a CFA that entirely covers the mono pixels, at the expense of making it pastel colours, but please stop claiming it's a real 300 dpi. It's not and Kaledio eink is darker, less sharp and potential for coloured lines with 300 dpi mono content than the same mono panels without the printed CFA.

The only way to never have colour artefacts on mono content is to treat it as 150 dpi.

How long did you see the two models for? Did you actually do something simple like test the same sentence in color vs. B&W on the same page on the same screen? It's really obvious if you do that.

It is real 300 DPI. The B&W parts contain just as many cells that are dark/light as the non-Kaleido versions. Yes, it's darker and less sharp because of the color layer but EVERY layer cuts sharpness and contrast. A 300 DPI screen with a Wacom digitizer, glass layer will be less sharp and darker than the same panel without those things. That doesn't make a model with a digitizer and glass layer not 300 DPI, it's still the same numbers of dots per inch even if it's a little fuzzier. Same thing with Kaleido 3. But even with the color layer, with my near sighted eyesight it's still noticeably sharper than 200 DPI and not that much worse than a 300 DPI device with a Wacom digitizer and glass layer. The Kindle PW4 (2018?) is a 300 DPI device with very few layers so yeah, understandably it looks better. But unless you're directly comparing you'll barely notice.

Kobo has a "Reduce rainbow effect", not a rainbow removal feature. It doesn't seem to cut the resolution in half but maybe lightly blur things. It doesn't completely eliminate rainbow effect in all instances and IMO is not worth using. Rainbow effect really only impacts images with very very small gaps like the screentone used by some comic book authors, although even there it's rare because it has to be so fine. For text, especially text with latin characters it's not a problem at realistically readable sizes, maybe for very complex CJK characters like 𰻞 it might be, but those are rare as well.

[nana77]

@Quoth: can it be that what can reduce the resolution of the blacks, between colors, is the RGB grainy filter?
@salamanderjustice, if you haven't watched it, in there there is an example of the color screen, which has 76 dpi on specs, but closer to 113 dpi on reality:

At minute 1:02.
(Promised, last time I post the video ).