Libra Colour So far I love my Colour Kobo. What about you?

[salamanderjuice]

Originally Posted by Quoth

So you have in reality admitted it's not at all 300 dpi in the sense that means on a pure monochrome 300 dpi screen. Thus while the underneath panel is 300 dpi, that is lost when you print the dots. You've admitted Manga isn't as good.

LCD panels are also inherently monochrome. No-one quotes the mono resolution, because that is effectively "damaged" by the coloured dots or stripes. Only the effective resolution without artefacts is quoted.

If you want no artefacts ever, then it's exactly 150 dpi, like my Kindle DXG, except you can read it in ordinary ambient light, you can't do that with Kaleido. That's the biggest remaining advantage of eink lost.

No, I've admitted that fine mesh screentone in manga can have a visible rainbow pattern. It doesn't effect all manga and how impacted a book will be depends on the artist and their use of fine mesh screentone which can range from never to every page. Some manga also have colored pages that are "ruined" on a B&W reader.

You are never ever going to trigger the rainbow artifacts problem with ordinary black text at any reasonable, readable size. It's just not a problem. So no, you don't need to run it at 150 DPI (and they don't) because you're not going to encounter it outside of special cases in pictures/illustrations. It's essentially moire. Nobody quotes resolutions for ZERO chance of moire.

Normal color LCDs can't produce white without turning on all subpixels. So you can't use the full "mono" resolution.

I read the Libra Colour in ambient light all the time. Even on crummy overcast days.

Unlike you I actually have experience using a Libra Colour and more than a few minutes using a color eInk device. Stop spreading misinformation. Seriously. It's not even REMOTELY like 150 PPI text.

[Quoth]

Originally Posted by salamanderjuice

Normal color LCDs can't produce white without turning on all subpixels. So you can't use the full "mono" resolution.

Nor can colour eink. It maybe doesn't look as bad because the subpixels are pastel.

You keep contradicting yourself.

But MS Cleartype and others do run the LCD or OLED at native higher reolution if feasible. Basically actually having a higher resolution screen and not doing that is better (the Anti-Rainbow setting on eink or Cleartype – or equivalent – off ).

I'm glad you like the Kaleido, but it doesn't avoid basic physics and the fact you sometimes see artefacts should prove I'm not making it up. It may look sharper than a Kindle DXG's 150 dpi, but it demonstrably is a lie to claim it's the same sharpness and quality as mono 300 dpi eink, apart from the fact in ordinary ambient light good enough for a Kindle K3 or Kindle DXG (or any pre-Carta screen based on Pearl with no touch or light pipelayers), it's unreadible due to being too dark and poorer contrast. I've seen Colour eink in person, not just online photos.

I'm happy for there to be choice, but the Colour Libra is certainly not a replacement for the Libra or Libra 2, only an alternative that's massively inferior if mono is enough. It's only a better alternative if you need colour and are happy to use a front light and insist on eink.

[salamanderjuice]

Originally Posted by Quoth

Nor can colour eink. It maybe doesn't look as bad because the subpixels are pastel.

You keep contradicting yourself.

But MS Cleartype and others do run the LCD or OLED at native higher reolution if feasible. Basically actually having a higher resolution screen and not doing that is better (the Anti-Rainbow setting on eink or Cleartype – or equivalent – off ).

I'm glad you like the Kaleido, but it doesn't avoid basic physics and the fact you sometimes see artefacts should prove I'm not making it up. It may look sharper than a Kindle DXG's 150 dpi, but it demonstrably is a lie to claim it's the same sharpness and quality as mono 300 dpi eink, apart from the fact in ordinary ambient light good enough for a Kindle K3 or Kindle DXG (or any pre-Carta screen based on Pearl with no touch or light pipelayers), it's unreadible due to being too dark and poorer contrast. I've seen Colour eink in person, not just online photos.

I'm happy for there to be choice, but the Colour Libra is certainly not a replacement for the Libra or Libra 2, only an alternative that's massively inferior if mono is enough. It's only a better alternative if you need colour and are happy to use a front light and insist on eink.

No I'm not. Kaleido 3 has a RGBW color mosaic designed to keep black text sharp (See here). Standard LCDs don't have white and don't have a layout designed with mono text in mind.

I never said there was no sharpness loss, personally at normal reading distances I can't tell sharpness-wise between a 300 PPI B&W Boox Nova 2 vs the Libra Color. I bet most people would be hard pressed to say there is a sharpness difference either. Contrast, sure. It also looks clearly better than the 200 PPI Note Air I have. I think it's totally fair to say it's 300 PPI since a letter at the same font size will have exactly the same number of black pixels on a Kaleido 3 screen as a non-Kaleido 3 screen. It just so happens that some of the Kaleido 3 black pixels have RBG color filters on top that you can't see (because they're black!).

I know you've seen colour eInk in person, but I don't believe you have used a Libra Colour, nor any Kaleido 3 device for an extensive period of time?. I don't think you've used one in the same places and lighting conditions as your usual devices. I find the Libra Colour pretty dang readable without the front light in a lot of situations. It's also a much faster device than the Libra 2.

Yes, in direct head to head comparison it's worse from a contrast persepective. But IMO it doesn't take long to get used to it.

[Quoth]

It's
RG
GB
that doesn't fully cover the "white" pixel. Not true RGBW at all. There are some strange "Pentile" displays that are RGBGY.

The RGBG is rare on LCD and more common on OLED. Neither of those has partial colouring of the pixel because they don't need to. The Kaleido would be as dark as Triton. The white area means the colours are only ever pastel (i.e. abysmal) and a compromise to improve brightess,

You must have an unusually brightly lit home to be able to read Kaleido with no front light. Kobo just gets the regular Kaleido panels from Ink Corp.

The only ereader I have that's too slow is the Kindle DXG with PDFs. I've Kobo Libra, Libre 2 and Sage, Kindle K3, DXG and PW3, and Sony PRS350 currently. I've had others.

I think it's totally fair to say it's 300 PPI since a letter at the same font size will have exactly the same number of black pixels on a Kaleido 3 screen as a non-Kaleido 3 screen.

But not true for white pixels, or edges of "black". Also in bright light (ambient or frontlight) the coloured dots reduce how neutral black the black is due to their coloured reflectance.

It's a compromise for those that want colour on eink. The sole objection I and others have isn't the existence of the Libra Colour, but the lack of choice, that there is now no mono 7″ from Kobo.

[salamanderjuice]

Originally Posted by Quoth

It's
RG
GB
that doesn't fully cover the "white" pixel. Not true RGBW at all. There are some strange "Pentile" displays that are RGBGY.

The RGBG is rare on LCD and more common on OLED. Neither of those has partial colouring of the pixel because they don't need to. The Kaleido would be as dark as Triton. The white area means the colours are only ever pastel (i.e. abysmal) and a compromise to improve brightess,

You must have an unusually brightly lit home to be able to read Kaleido with no front light. Kobo just gets the regular Kaleido panels from Ink Corp.

The only ereader I have that's too slow is the Kindle DXG with PDFs. I've Kobo Libra, Libre 2 and Sage, Kindle K3, DXG and PW3, and Sony PRS350 currently. I've had others.


But not true for white pixels, or edges of "black". Also in bright light (ambient or frontlight) the coloured dots reduce how neutral black the black is due to their coloured reflectance.

It's a compromise for those that want colour on eink. The sole objection I and others have isn't the existence of the Libra Colour, but the lack of choice, that there is now no mono 7″ from Kobo.

No, that's not the arrangement for Kaleido 3. There are "white" subpixels that don't have a color layer. That's not the case on a normal LCD or OLED display.

I found an Aura One personally too slow for PDFs and the Libra/Libra 2 all use the same slow single core Freescale 1GHz SoC that makes zooming and paging slow.

Yes, I'm sure my north facing apartment in a rainy coastal city is exceptionally bright during the day with no lights on.

The sole objection I have to you, is your BS claim of B&W text being 150 DPI. It's not. Don't mislead people.

[Quoth]

Originally Posted by salamanderjuice

I found an Aura One personally too slow for PDFs and the Libra/Libra 2 all use the same slow single core Freescale 1GHz SoC that makes zooming and paging slow.

They are far too small for PDFs unless they are very small instruction books. Even an 8″ is only just large enough for an A5 PDF.

Originally Posted by salamanderjuice

The sole objection I have to you, is your BS claim of B&W text being 150 DPI. It's not. Don't mislead people.

I'm saying it is 150dpi if you want no artefacts.
Also the Kaleido 3 does not have full size white pixels.