E-ink Screen


zonova

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I'd love an e-ink screen like that, but it would make the device so easy to break...
 

Tenka

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Would it?  I'm not informed enough yet, but I hoped there could be a very thick protective layer above it.  I would also hope that this screen in theory could not look like a screen, or like anything was unusual at all while it was turned off.
 

vcoleiro1

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You could do it with gorilla glass or something of that nature, the same as smart phones
 

God Ginrai

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I'd love an e-ink screen like that, but it would make the device so easy to break...
Actually, no it won't. They happen to have very rugged e-ink screens out there.

Right here, if you go to 22:35 in this video, one of the spokespeople for e-ink actually stomps on it and it continues working just fine:

https://www.youtube.com/embed/ajqiG_4tLcc?feature=oembedIt could. I want it whether it has touch or not. It is possible to get it working with capacitive touch technology.

-God Ginrai
 
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Tenka

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At 8:25 in the video there is a crazy illusion, the top four rectangles in the large pixel display are moving all over, but the bottom four rectangles are not effected. 

I see, these can be very durable and don't need protective layers at all.  E-Ink displays are beginning to look more like regular image displays though, concerning the unused space on them, it appears to always be filled with something.  I was hoping that unused space in an E-Ink display on the back of the screen could look exactly the same as the unpopulated Pyra case surface.  It no longer sounds like the display can just be opaque where unused, but maybe the color displayed on it can be similar enough to the color of the rest of the case to fully disguise it.  Does this sound possible?
 

ekianjo

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Do you want 2 screens?


Or do you talk about an E-ink screen which can display color and motion fluently?
Is color E-ink even widely available yet?
No, and QUalcomm just canned Mirasol apparently not too long ago because they could not manufacture it on a larger scale. That sucks, but we won't get color e-screens anytime soon. 
 

God Ginrai

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At 8:25 in the video there is a crazy illusion, the top four rectangles in the large pixel display are moving all over, but the bottom four rectangles are not effected. 

I see, these can be very durable and don't need protective layers at all.  E-Ink displays are beginning to look more like regular image displays though, concerning the unused space on them, it appears to always be filled with something.  I was hoping that unused space in an E-Ink display on the back of the screen could look exactly the same as the unpopulated Pyra case surface.  It no longer sounds like the display can just be opaque where unused, but maybe the color displayed on it can be similar enough to the color of the rest of the case to fully disguise it.  Does this sound possible?
We would probably have a monochrome e-ink display, which would be just black or not black. So we could match the color of the case if the case was black. Also, we could possibly use that color overlay idea to shade the e-ink screen so it matches the case colors. I'm not sure it's worth it to add a color overlay, tho'.

Neat thought. Imagine plugging in the device and a charge indicator appears on the lid thanks to the e-ink screen.

-God Ginrai
 

Natsu

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No, and QUalcomm just canned Mirasol apparently not too long ago because they could not manufacture it on a larger scale. That sucks, but we won't get color e-screens anytime soon.
Really? Man.We may not need them in the future anyway. Link
 

ekianjo

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No, and QUalcomm just canned Mirasol apparently not too long ago because they could not manufacture it on a larger scale. That sucks, but we won't get color e-screens anytime soon.
Really? Man.
We may not need them in the future anyway. Link
I wouldn't count on stuff like that anyway. 

Gizmodo has zero credibility in predicting when stuff hits the market, and they completely fail to explain:

- the market issues

- the scalability issues

- the supply chain issues

inherited by all these new screen technologies. 

And, by the way, they are only showing microscopic screens on these pics, which means they are nowhere ready to make bigger screens. Call me sceptic on this. There's always a revolution in technology every single week if you believe the papers, but the ones that make it on the market are very, very few. 
 

Kiga

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Color e-ink are dull and expensive. I like the fact that it is monochrome, it looks elegant. It could be replaced by color in next Pyra's versions.
 
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pmprog

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If the (outside) lid of the Pyra has an eInk display, I think I'd like that - could use that to display calendar events or the current MP3 being played
 

ekianjo

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If the (outside) lid of the Pyra has an eInk display, I think I'd like that - could use that to display calendar events or the current MP3 being played
But where would you connect this additional display ? on GPIO ports ? 

One cool thing would be to have the LOGO of the Pyra displayed on this E-ink display :) instead of being molded in the case. 
 
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God Ginrai

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But where would you connect this additional display ? on GPIO ports ?
IIRC, All the SoCs we've been looking at have support for up to 3 displays, so if one is routed to the main screen, and one is routed to HDMI, we should still have one display's pins that we can connect, right?

One cool thing would be to have the LOGO of the Pyra displayed on this E-ink display :) instead of being molded in the case.
Exactly. The logo of the Pyra as the default, and then users can personalize it to display whatever they want later.

-God Ginrai
 

slaeshjag

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E-ink is not exactly a high bandwidth application. You can probably get away with just slapping it onto the SPI-bus and nobody will notice. I don't think you even can use a normal display interface to drive an E-ink display.
 

slaeshjag

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You preferably want to use a real databus from the SoC, even if it means you use GPIO on a µC to actually drive the display. Bit-banging a graphical display in a kernel driver is silly. Although I guess you could use one of the M4 cores in the OMAP for it...
 

WizardStan

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Bit-banging a graphical display in a kernel driver is silly.
Unlike regular displays which need to be refreshed constantly, you'd only have to stream the screen when it updated, so it actually isn't all that bad of an idea to just use the CPU.
 

slaeshjag

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It is, if you can't have the interface handled by the hardware.

An e-ink display will most likely not want a data clock as fast as you can flip a GPIO pin. Which means you have to wait a while before poking the GPIO pin. If you allow context switch while this happens, you'll get really, really, really slow data transfers, maybe minutes to transfer the framebuffer.

The alternative is to lock up the CPU for the duration of the data transfer. If the data bus is slow, that could be tens or hundreds of milliseconds. 

It is silly to bit-bang a framebuffer with the CPU.
 
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