Color Eink display for a future Jolla?

How about IMod?

This looks quite promising. But I haven't seen any commercial available device using this technology. Event though this technology is about 5 years old. So there are probably some issues which are not fully resolved. The fundamental idea of this, the reflecting display, is actually quite old. There have been a few devices using that technology but it seems that it has vanished again from the market. But having such a transflective display in the next Jolla Phone would be great. Mainly because this would increase the sunlight readability extremely and would reduce power consumption a lot because the back light would be needed much less than now. The feature of E-Ink or IMod (keeping the pixel state without power) would be a great addition to this. Provided that this technology will soon reach mass production (which I don't really think; But well, let's hope it).

This is a wearable device that uses IMod.This is what they have improved these years.

The devices you linked are all smart-watches with a pretty small screen. Also the resolution is quite low. Around 230dpi. So to be able to use this screen technology in the next Jolla Phone Qualcomm has to be able to produce bigger panels with a higher dpi. These two requirements are the most complex ones in scaling up a new display technology. Even though Qualcomm made interesting improvements with the pixels.

Another point is, that one of the two devices is from Qualcomm itself. Probably mainly as a tech-demo. There the price doesn't matter so much respectively there is a focus on the screen so it can cost more. But for Jolla 2 there are many other aspects that should be improved (CPU, GPU, RAM, Screen...). Sure, the screen has to be improved. The question is, how much of the total device cost should go into the screen.

This is what I mean by mass production. We need other companies to use this technology in screens of similar (or even the same size). As long as this doesn't happen the few Jolla Phone are by far not enough to make the price acceptable.

And while I would love to see this kind of screen in my next phone, I don't think that it is currently cheap enough to integrate with out increasing the price of the device to much or without neglecting other parts of the phone.

This is a product of Taiwanese company with IMod in 2012. I am sorry the article is in Chinese, so let me explain something of them. The price is 14800NTD(about 490USD) with 5.7in (1024x768) IMod display. The price is high by a novel series(printed about 270USD) included.