Yes, but less than 1/2 of what it does to outside light.
I expect that the front light control setting will dominate over outside light.
And again, keep in mind that its major effect will be in the violet to ultra-violet range.
That range that provides the least useful information to sight.
Yes - I have done simple experiments with "sunglasses" on my eyes.
But that effects both the outside light and the front light equally.
What I want to try is to put the "sunglasses" on the Kindle.
Literally -
First I will try a tinted "screen protector".
If that works, it would be great, simple to install (and remove) by the Kindle user.
Also a heck of a lot easier to make than tinting the actual assembled display.
= = = = =
It seems that if I include the question:
"Are your dyes made under license of the various patent holders?"
with my queries to off-shore suppliers, the e-mail falls into a black hole.
100% non-response.
Somehow I am not surprised.