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Modos Color Monitor Pushes E-Paper Displays Further

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Re: Modos Color Monitor Pushes E-Paper Displays Further

#81
post #4

There is an awesome YouTube video about this from the person who made it: https://m.youtube.com/watch?v=nHbA2-_qzH4

Okay, that video is great.

Product questions that I couldn't find an answer to. From https://www.crowdsupply.com/modos-tech/modos-flow, I see "On the go, you can power Flow at up to 40 Hz with a single USB Type-C cable. At a desk, you can connect additional power and take advantage of its full 60 Hz refresh rate."

1) This surprises me a bit... is USB-PD incompatible with DisplayPort alt mode, or is this just based on an observation that display port devices tend to give limited power output?

2) Is every DisplayPort alt mode host able to give enough power to run at 40 Hz? In particular, can this be driven on the go directly from an iPhone?

3) Is that second USB port usable as a data port hubbed to the device when powering over the DisplayPort port?

4) I know it's possible to provide power from the display back to the host device when using DisplayPort alt mode -- when powering the display from the second USB-C port, is the connected device also powered?

The two use cases that would be super interesting to me is plugging this in to my iPhone or similar on-the-go, and plugging a USB-C keyboard into the second port on it for quick e-mails at the coffee shop and similar; and plugging this in to an iPhone, plugging my power bank into the monitor and keeping the monitor in high-power mode and the iPhone charging while working with a Bluetooth keyboard.

Obviously I don't expect it to handle these use cases out of the box, but... open source! This is really a question about what the hardware design is capable of, not the current software/firmware/FPGA capabilities.

Re: Modos Color Monitor Pushes E-Paper Displays Further

#82
post #81
post #4

There is an awesome YouTube video about this from the person who made it: https://m.youtube.com/watch?v=nHbA2-_qzH4

Okay, that video is great. Product questions that I couldn't find an answer to. From https://www.crowdsupply.com/modos-tech/modos-flow , I see "On the go, you can power Flow at up to 40 Hz with a single USB Type-C cable. At a desk, you can connect additional power and take advantage of its full 60 Hz refresh rate." 1) This surprises me a bit... is USB-PD incompatible with DisplayPort alt mode, or is this just based o…

I really want to buy it so I searched for the same questions bit in the end I just decided to go for it

Re: Modos Color Monitor Pushes E-Paper Displays Further

#83
post #76

Earlier quoted context omitted.

> A claim in the video that I can't verify but makes economic/logistic sense is that the speed problem isn't the panels but the controllers. I don't understand the claim. It is lacking in specifics. Are they claiming that electrophoretic materials (meaning the panels) can actually switch (meaning move pigments) faster than say x.y micrometers per second? I don't think that is true. The article shows that what Wenting…

> Are they claiming that electrophoretic materials (meaning the panels) can actually switch (meaning move pigments) faster than say x.y micrometers per second? No, I think the claim is that the controllers are slower that what the panels can theoretically support.

> > Are they claiming that electrophoretic materials (meaning the panels) can actually switch (meaning move pigments) faster than say x.y micrometers per second?

> No, I think the claim is that the controllers are slower that what the panels can theoretically support.

That claim that controllers are slower than panel (that's the electrophoretic material) doesn't seem reasonable to me. I guess that's why there's no specific numbers and data shown.

Re: Modos Color Monitor Pushes E-Paper Displays Further

#84
post #81
post #4

There is an awesome YouTube video about this from the person who made it: https://m.youtube.com/watch?v=nHbA2-_qzH4

Okay, that video is great. Product questions that I couldn't find an answer to. From https://www.crowdsupply.com/modos-tech/modos-flow , I see "On the go, you can power Flow at up to 40 Hz with a single USB Type-C cable. At a desk, you can connect additional power and take advantage of its full 60 Hz refresh rate." 1) This surprises me a bit... is USB-PD incompatible with DisplayPort alt mode, or is this just based o…

1) Lots of desktop displays provide picture and high power, but very few laptops (and rarely even desktops) can provide any significant power from their ports (can be done of course but it is a cost thing).

2) I'd say yes (if the iphone supports it). Biggest caveat in my mind is whether the iphone allows enough current to drive the display.

3) Doubt it.

4) That is how these normally work, I don't know but that would be my expectation.

Re: Modos Color Monitor Pushes E-Paper Displays Further

#85
post #75

Last time I read about them (here in HN) somebody highlighted that the problem wasn’t to get them to function at a high refresh rate, the problem is they stop being energy effecient at that rate. Now I mostly skimmed the article but I couldn’t find any information regarding that.

I think that's true, but energy efficiency is only one potential benefit of epaper displays, and not one that is a goal with this product.

How durable are they when driven in this kind of regime? They are mechanical devices after all.
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