> How many shades of grey does it support?

16 levels of grayscale support.

> How bad is the ghosting?

Ghosting depends on the mode you're using and the content.

> How white is the background?

Varies, depends on the panel you're using.

> Is it clear enough to be used white-on-black?

Yes

> How often does it need a full screen refresh?

That's up to you; you can manually clear with a button press, use auto-clear mode, or programmatically control it.

▲ lo0dot0 5 days ago | parent | next [-]

Answers would be more helpful if you answered based on the panel you were using rather than saying it depends on the panel

▲ dotancohen 5 days ago | parent | prev [-]

  > Ghosting depends on the mode you're using and the content.

I'm talking about 75 hz mode.

  >> Is it clear enough to be used white-on-black?
  > Yes

Really? My Nook and Boox devices aren't. The ghosting in even the highest quality refresh mode is just to much in "dark mode". I'd love to see this.

	▲	yoz-y 5 days ago \| parent [-]
		Back in the days when OLED screens didn’t exist, the rule was that white on black text needs to be bolder for legibility. Since super high contrast is now par for the course, designers with high end devices forgot about this. I agree that the dark mode on the boox is terrible (I find for example obsidian absolutely unusable). But this could be easily fixed with bolder fonts.