Edumacational - e-ink technology

Psyke · 09-06-2011, 08:43 PM

http://videosift.com/video/Color-E-I...-Ink-Explained

for those who have ever been curious.

Danger · 09-06-2011, 10:58 PM

Very cool. Looking forward to seeing a Kobo Touch with colour E-Ink and no glass substrate.

The cameraman interviewer on the other hand was an idiot. I felt sorry for the poor guy trying to answer his questions. I mean seriously... MICRO ANTS? The guy should have been given an atomic wedgie, had his camera taken away and somebody who was actually competent do the interview.

wes101 · 09-06-2011, 11:47 PM

good video, anyone know the reason for the numbers on the smart credit card?

TedJ · 09-07-2011, 02:56 AM

It displays a single time use PIN number that changes for each transaction.

danskmacabre · 09-07-2011, 03:24 AM

Thanks, that was very interesting.

He says the colour filter takes up no more power for eINK. I wonder how that works.. As surely there's some kind of switching working there to activvate the various colour filters?
Wouldn't that require an electrical charge?
Is it maybe the charge required to do this is a lot lower that the charge required to change the eINK display itself?

baggins · 09-07-2011, 04:28 AM

You wouldn't need to switch anything to display different colours.
Each pixel is divided to four subpixels which are each behind a different colour filter (R,G,B,W).
For each subpixel you can set 16 different grey levels, which after going through the colour filter are 16 different colour intensity levels.
Since the 4 subpixels are very close together, you see each such quartet as one pixel and the colours mix up to create a compound colour. 16 by the power of 3 (RGB) plus the W for intensity gives you 4096 colours in 16 levels of intensity.

The same principle is used by LCD displays.

danskmacabre · 09-07-2011, 07:10 AM

ah ok, thanks for the info

3d0g · 09-07-2011, 07:47 AM

Quote:

Originally Posted by baggins

Each pixel is divided to four subpixels which are each behind a different colour filter (R,G,B,W).
The same principle is used by LCD displays.

As e-ink is more like paper than LCD (light reflected, not emitted), I'd suspect CMYK would be used, not RGB.

baggins · 09-07-2011, 07:57 AM

Quote:

Originally Posted by 3d0g

As e-ink is more like paper than LCD (light reflected, not emitted), I'd suspect CMYK would be used, not RGB.

Perhaps so. It makes sense.
I wrote RGBW because that's what he said they use in the video. I'm sure he simplified things.

09-06-2011, 08:43 PM	#1
Psyke Evangelist Posts: 482 Karma: 534340 Join Date: Oct 2010 Location: Ottawa/Canada Device: Kobo Wi-Fi - Kobo Touch - GNex - N7	Edumacational - e-ink technology http://videosift.com/video/Color-E-I...-Ink-Explained for those who have ever been curious.

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09-06-2011, 10:58 PM	#2
Danger Evangelist Posts: 490 Karma: 1665031 Join Date: Nov 2010 Location: Vancouver Island, Nanaimo Device: K2 (retired), Kobo Touch (passed to the wife), KGlo, Galaxy TabPro	Very cool. Looking forward to seeing a Kobo Touch with colour E-Ink and no glass substrate. The cameraman interviewer on the other hand was an idiot. I felt sorry for the poor guy trying to answer his questions. I mean seriously... MICRO ANTS? The guy should have been given an atomic wedgie, had his camera taken away and somebody who was actually competent do the interview.

09-06-2011, 11:47 PM	#3
wes101 Zealot Posts: 121 Karma: 42214 Join Date: Apr 2011 Location: CANADA Device: Kobo touch	good video, anyone know the reason for the numbers on the smart credit card?

09-07-2011, 02:56 AM	#4
TedJ Groupie Posts: 189 Karma: 86778 Join Date: Jun 2011 Location: Brisbane, Australia Device: Kobo Touch	It displays a single time use PIN number that changes for each transaction.

09-07-2011, 03:24 AM	#5
danskmacabre Guru Posts: 733 Karma: 3593438 Join Date: Jun 2011 Location: Australia Device: Kobo Glo. Galaxy Tab S 8.4	Thanks, that was very interesting. He says the colour filter takes up no more power for eINK. I wonder how that works.. As surely there's some kind of switching working there to activvate the various colour filters? Wouldn't that require an electrical charge? Is it maybe the charge required to do this is a lot lower that the charge required to change the eINK display itself?

09-07-2011, 04:28 AM	#6
baggins Member Posts: 22 Karma: 5174 Join Date: Aug 2011 Device: Kobo Touch, Kobo Glo	You wouldn't need to switch anything to display different colours. Each pixel is divided to four subpixels which are each behind a different colour filter (R,G,B,W). For each subpixel you can set 16 different grey levels, which after going through the colour filter are 16 different colour intensity levels. Since the 4 subpixels are very close together, you see each such quartet as one pixel and the colours mix up to create a compound colour. 16 by the power of 3 (RGB) plus the W for intensity gives you 4096 colours in 16 levels of intensity. The same principle is used by LCD displays.

09-07-2011, 07:10 AM	#7
danskmacabre Guru Posts: 733 Karma: 3593438 Join Date: Jun 2011 Location: Australia Device: Kobo Glo. Galaxy Tab S 8.4	ah ok, thanks for the info