Kobo screen whiteness

TheSmitty · Yesterday, 08:17 AM

I have both a Kindle Colorsoft and Kobo Colour. One annoying thing I have with the KC is that the screen background behind text is not as "white" as it is on the Colorsoft. Neither are as white as a traditional B/W device of course. I have played with various devmode options to see if there was a way to improve this but have been unsuccessful so far. Any other ideas?

Quoth · Yesterday, 09:07 AM

You'll also find big variation if you have 20 of each.

Is this with front light on or off? They likely don't use the same LEDs and may not use the same lightpipe layer, though it's likely it is.

There is a lot of eink screen variation, unlike any other display technology ever. The lightpipe and how it's assembled etc make variation greater.

My Libra 2 and Libra H2O are identical under ambient light with LEDs off, but other people see significant differences.

The Kindle Colorsoft had a lightpipe issue too, with yellowness. Newer manufacture might not have it as much and Amazon claim to have reduced the issue in firmware.

TheSmitty · Yesterday, 10:05 AM

Yeah, I figured that was the case but was hopeful there was a software adjustment to compensate. I can deal with the inferior KC screen until the next cycle.

Yesterday, 08:17 AM	#1
TheSmitty Addict Posts: 326 Karma: 1181422 Join Date: Dec 2017 Location: DFW, TX area Device: Kindle Colorsoft, Libra Colour, Voyage, iPad Pro 11, iPad Mini 7	Kobo screen whiteness I have both a Kindle Colorsoft and Kobo Colour. One annoying thing I have with the KC is that the screen background behind text is not as "white" as it is on the Colorsoft. Neither are as white as a traditional B/W device of course. I have played with various devmode options to see if there was a way to improve this but have been unsuccessful so far. Any other ideas?

Yesterday, 09:07 AM	#2
Quoth Still reading Posts: 14,389 Karma: 107076273 Join Date: Jun 2017 Location: Ireland Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper	You'll also find big variation if you have 20 of each. Is this with front light on or off? They likely don't use the same LEDs and may not use the same lightpipe layer, though it's likely it is. There is a lot of eink screen variation, unlike any other display technology ever. The lightpipe and how it's assembled etc make variation greater. My Libra 2 and Libra H2O are identical under ambient light with LEDs off, but other people see significant differences. The Kindle Colorsoft had a lightpipe issue too, with yellowness. Newer manufacture might not have it as much and Amazon claim to have reduced the issue in firmware. Last edited by Quoth; Yesterday at 09:10 AM.

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Yesterday, 10:05 AM	#3
TheSmitty Addict Posts: 326 Karma: 1181422 Join Date: Dec 2017 Location: DFW, TX area Device: Kindle Colorsoft, Libra Colour, Voyage, iPad Pro 11, iPad Mini 7	Yeah, I figured that was the case but was hopeful there was a software adjustment to compensate. I can deal with the inferior KC screen until the next cycle.