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E Ink Waveforms are a closely guarded secret

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31–40 of 138 posts

Re: E Ink Waveforms are a closely guarded secret

#31
post #4

E Ink seems to be one of the technologies that is hampered solely by patents. It's too sad that we're only going to get major innovations in e ink tech in 15-20 Years...

Would/could/do Chinese manufacturers ignore those patents? Are they not able to sell abroad if they do?

Considering that you can buy 5$-20$ E ink panels on Alixpress today, I would guess those manufacturers do ignore western patents.

Re: E Ink Waveforms are a closely guarded secret

#32

E Ink seems to be one of the technologies that is hampered solely by patents. It's too sad that we're only going to get major innovations in e ink tech in 15-20 Years...

I don't understand how that is even possible. Patent owners want their cut, but in the end they want the product to be made, too, because that's the only way they get money. So they will take as high a cut they can negotiate, reducing the margins of the end manufacturer to a marginal price. But that is the case with every "supplier". At work I looked into integrating e-ink into a product, and the problem seems not pa…

A VC will not invest in a firm, if someone else has the ability to extract all future profits via patent licensing

Re: E Ink Waveforms are a closely guarded secret

#33
post #27

Here is a teardown of a 13.3 high perf E-ink monitor I did a few months ago: https://kevzettler.com/2018/02/11/dasung-paperlike-pro-teard... The post identifies some on market E-ink display components and discusses the design of a proprietary display driver.

Did you eventually switch the panel to ES133UT2? Dasung released a new version called paperlike HD (also called paperlike 3). In that version, it does not look like having a glass panel.

Re: E Ink Waveforms are a closely guarded secret

#34
post #25

Earlier quoted context omitted.

Why would you use an e-ink display for videos? The main advantage is the low power consumption because it needs power only to refresh, using it for a video it will negate that advantage and draw much more power than a traditional display with an awful image quality...

1. Currently, I use it for writing code and reading papers. However, I still want the monitor to be a good enough drop-in monitor for things I need to occasionally do. For example, I need to switch to a browser window to check what was that error I'm getting. 2. Visual snow syndrome: Many had their first experience of visual snow after staring into the screen for too long. People who believe in that is the cause of v…

How well does it fare for those tasks (code and papers)? I'd very much like to have such a screen but the price tags of what I've seen so far is probihitive…

Re: E Ink Waveforms are a closely guarded secret

#35
Is Waveforms what is in Epsons eink controller chips?

https://phys.org/news/2011-05-dpi-epson-e-ink-epaper-resolut...

Japan display has made 600 dpi controllers. http://www.j-display.com/english/news/2017/20170522.html

Further been thinking of building an Eink based smartphone, the eink display would have low power. Some kind of low power small system board running Linux and a 4g modem. Not sure what system board to pick. Batteries should be LifePo4 Lithium iron for battery safety. What kind of high resolution touch based eink displays are out there which are easy to drive from a small Linux system board?

Re: E Ink Waveforms are a closely guarded secret

#36
post #17

Recently, I brought a Dasung paperlike HD to use as a monitor. (crazy expensive, prob should've spend money elsewhere...) I thought some things were impossible with eink, but it proved me wrong. (video in a reasonable fps) It has a few different ways of display. For example: Floyd–Steinberg dithering: essentially only black and white with dithering, and the speed pretty good. A16: uses 16 shades of grey, but the spee…

Why would you use an e-ink display for videos? The main advantage is the low power consumption because it needs power only to refresh, using it for a video it will negate that advantage and draw much more power than a traditional display with an awful image quality...

> The main advantage is the low power consumption

No?

The main advantage is that it's easier on the eyes

Re: E Ink Waveforms are a closely guarded secret

#37
post #25

Earlier quoted context omitted.

Why would you use an e-ink display for videos? The main advantage is the low power consumption because it needs power only to refresh, using it for a video it will negate that advantage and draw much more power than a traditional display with an awful image quality...

1. Currently, I use it for writing code and reading papers. However, I still want the monitor to be a good enough drop-in monitor for things I need to occasionally do. For example, I need to switch to a browser window to check what was that error I'm getting. 2. Visual snow syndrome: Many had their first experience of visual snow after staring into the screen for too long. People who believe in that is the cause of v…

What exactly about emitted light is a problem? Light doesn't carry a memory of how it was generated, so it must be some difference in some measurable property, e.g. brightness/contrast/color spectrum/flicker/polarization, or the way these change at different viewing angles. If you know which attributes are important then you might be able to match them with an emissive display.

Re: E Ink Waveforms are a closely guarded secret

#38
post #9
post #5

Earlier quoted context omitted.

Importers would likely get their shipments seized. It's not illegal for manufacturers to export their goods out of China, but US customs doesn't look too highly on importing goods that contravene on registered US IP. Small time shipments are unlikely to be looked at (eg. if someone buys a single electronic ink display off of AliExpress), but someone actually importing many displays for resale would likely eventually…

Honestly how would you even know if the e-ink displays infringe on IP? I can’t imagine them doing anything.

A patent gives you a monopoly which makes things easy.

You occasionally search the market for products that contain your tech (in this case eink), then look in your records to see if they bought/licensed from you.

Re: E Ink Waveforms are a closely guarded secret

#40
For extra fun for all the people trying to reverse it, the exact waveform data changes per batch of displays. The overall strategy will remain the same though.

If you want to see a more complete list of waveform names you could probably go look at the gpl releases of popular readers...

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