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Old 05-23-2024, 03:02 PM   #31
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Originally Posted by Julie Paradise View Post
Is the dpi really that crucial for you? Have you seen some other devices in real life?

Maybe this video by Voja/MyDeepGuide on YouTube helps you evaluate this aspect: Is the 300 PPI Resolution All That Matters? Note Air 3C vs Tab Ultra C Pro vs Amazon Kindle Scribe https://www.youtube.com/watch?v=wnEV2B0WIWE
Oddly the Boox Note Air3 C has a 300PPI resolution Carta screen (drops to 150PPI in colour). It would appear that Amazon's exclusive on 300PPI 10" class screens only applied to the B&W screens.
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Old 05-23-2024, 03:03 PM   #32
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Oddly the Boox Note Air3 C has a 300PPI resolution Carta screen (drops to 150PPI in colour). It would appear that Amazon's exclusive on 300PPI 10" class screens only applied to the B&W screens.
Makes sense, since Amazon doesn't have any color eInk devices.
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Old 05-23-2024, 03:51 PM   #33
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Here is a good video comparing the Kindle Scribe to the Onyx Boox Note Air 3.

Shows that the Scribe renders fonts better than the Boox.
Voja made a mistake in that video: he left the Boox device in speed mode, which degrades PQ in exchange for faster page turns. Here is his video with the correction:



When you're using the slow refresh mode on Boox, 227 and 300 PPI are pretty much identical. I think you'd be happy with the NA3, or at least as happy as you can be, since the device you want doesn't exist.
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Old 05-23-2024, 04:09 PM   #34
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The 227 is certainly ok vs 300 for ebooks or a normal size font. It's noticeably poorer for scan PDFs of a magazine, or Letter/A4 pages with small text.

Also 200 dpi with 16 million shades (200 to 1000 grey levels) LCD is far better than 14 shade + black + white eink at 300 dpi for scanned PDFs. Only direct rendered epub is better at 300 dpi than 200 dpi LCD with a matt screen.

The Boox Note Air3 C can't actually do the same quality as a 300 dpi mono screen unless you dissaemble the light pipe layer and disolve off the coloured printed dots. It's impossible.

Also videos are STUPID to compare screens. You need decent stills in controlled light, png or tif files (not jpeg) and a decent screen with no reflections or glare.

Last edited by Quoth; 05-23-2024 at 04:11 PM.
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Old 05-23-2024, 06:00 PM   #35
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Quote:
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The Boox Note Air3 C can't actually do the same quality as a 300 dpi mono screen
Thankfully the NA3 exists. The NA3C is also extremely poor when it comes to battery life; the BSR GPU that cleans up the Kaleido ghosting is a power hog. The NA3 doesn't suffer from this problem, either. Unless you really need colour for some reason, NA3 is the way to go.
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Old 05-23-2024, 08:08 PM   #36
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Quote:
Originally Posted by Aleron Ives View Post
Voja made a mistake in that video: he left the Boox device in speed mode, which degrades PQ in exchange for faster page turns. Here is his video with the correction:

Sadly he still refers to the Boox devices as 227 PPI while the specs say that they are a 300 DPI B&W with the Kaleido 3 colour filter array giving a 150 DPI colour image. It was nice seeing the CFA showing in some of the images.
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Old 05-23-2024, 08:32 PM   #37
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The NA3C is 300 PPI Kaleido 3. The NA3 is 227 PPI greyscale.
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Old 05-23-2024, 09:39 PM   #38
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Quote:
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The NA3C is 300 PPI Kaleido 3. The NA3 is 227 PPI greyscale.
Going by what he said and the images, he was using the NA3C and Tab Ultra C. Both of which are Kaleido 3 screens.

As the caption says: Watch Scribe vs Boox Note Air 3C vs Tab Ultra C. In the still image, you can see the CFA showing for both Boox devices.
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Old 05-23-2024, 11:12 PM   #39
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The relevant part of the video is the correction at 3:30 which is NA3 vs Kindle Scribe. He probably should have made a separate video for the correction, but instead it's a prologue to another video comparing 300 PPI screens. The thumbnail is related to the rest of the video, which is not relevant. You have to actually watch it.
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Old 05-24-2024, 01:25 AM   #40
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Quote:
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300 DPI B&W with the Kaleido 3 colour filter array giving a 150 DPI colour image
It is not 300 ppi b/w, but only 300 ppi black - all other 4095 colors incl. the 15 grayscales (incl. white) have 150 ppi; the 300 ppi color dots bordering black are too small to be seen.
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Old 05-24-2024, 02:28 PM   #41
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The 227 is certainly ok vs 300 for ebooks or a normal size font. It's noticeably poorer for scan PDFs of a magazine, or Letter/A4 pages with small text.

Also 200 dpi with 16 million shades (200 to 1000 grey levels) LCD is far better than 14 shade + black + white eink at 300 dpi for scanned PDFs. Only direct rendered epub is better at 300 dpi than 200 dpi LCD with a matt screen.

The Boox Note Air3 C can't actually do the same quality as a 300 dpi mono screen unless you dissaemble the light pipe layer and disolve off the coloured printed dots. It's impossible.

Also videos are STUPID to compare screens. You need decent stills in controlled light, png or tif files (not jpeg) and a decent screen with no reflections or glare.
The problem with LCDs is that they're backlit, and they suck battery.

I really want eInk, because it's so much easier on the eye and has a battery life of weeks instead of hours.

There is a front lit LCD technology. But the videos I watched show the device has a really large bezel, and the battery life is 20 hours, instead of the usual 10 most tablets get you. It's better. But it's not really the same as an e-ink panel. Light still needs to travel through the panel and reflect back out. So, I don't think this will be any better for eye strain.

I don't know if we'll ever get a true multi-color e-ink display with decent contrast. I hope someone can crack it.
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Old 05-29-2024, 01:54 AM   #42
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Do any devices have a 300 PPI screen, like the Kindle Scribe?
yes, iReader Smart
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Old 05-29-2024, 05:51 AM   #43
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The new iReader Smart X3 is an E Ink tablet with a 10.65 inch, 2560 x 1920 pixel black and white display … Carta 1300
https://liliputing.com/ireader-smart...-1300-display/
China only originally about $475 locally.
Runs Android, which is good if you want it as an eink Tablet and bad if you just want ebooks and PDFs.

I've not done the sums on ppi.
Amazon Scribe is 10.2-inch 2480 x 1860 resolution 300PPI, so does sound better for PDFs.
Likely the iReader Smart X3 is not a walled garden for PDF annotation like the Scribe, which requires Amazon's server and conversion to fixed layout KFX.

Edit:
Also a Wacom stylus.
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