I am still working on my review of Pocketbook’s new ereader, but I thought you might be interested in a follow up post on the screen tech.
The post I published last week sparked a number of requests both here and on MobileRead forums concerning the screen tech. The thing is, E-ink isn’t answering questions about the Kalreido screens, so we knew almost nothing about how it works or what it can do. So when everyone learned that I had a Pocketbook Color, they asked me to test it.
I still don’t really understand how the screenworks, but I was able to confirm that it can display black and grayscale at 300 ppi while simultaneously displaying color at 100 ppi.
I know that sounds improbable, but it’s really what we saw in the photos.
I am going to post the photos below, but first I want to link to the original photos in Google Drive (one, two). My website optimized image files, and that can affect quality. My photos are not of the best quality but I still want you to see the original.
Here’s Pocketbook Color displaying color text:
And here it is displaying shades of gray.
If you zoom in on the images to around 400%, you will notice that the black text and the gray text is displayed using considerably more pixels than the color text. It is quite clear that one is being shown at 300 ppi, and the other is not.
And what is especially interesting is that both the black and the color text are being displayed on the same screen at the same time, only at different resolutions.
I wish I could tell you more about how that was done, but I can’t.
It is cool tech, though, isn’t it?