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Comment by ridgeguy | Hacker News Reader

Used the white screen at

http://www.ledr.com/colours/white.htm

Can see faint blue & yellow bow tie figures as the article describes on my laptop LCD. They change as I rotate the screen. Very interesting.

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I cant see any bow ties :/

Wait I think I do.. Can't say for sure but they look like two small yellow marbles stacked vertically. What can I say about the polarization of my lcd?

Yup, that's them. It should look like this, only _much_ fainter:

https://en.wikipedia.org/wiki/Haidinger's_brush

(The blue part is a bit harder to see than the yellow.)

That's a helpful reference. I definitely see it on a 2014 rMBP.

Maybe it depends on the screen type. I can see it very clearly on my macbook LCD screen, but I can't see almost anything g on my Samsung S4 OLED screen.

> OLED screen.

Right. I would not expect it with an OLED since that is not polarized.

I came here to comment that Haidinger's brush is fainter than the light coming through from the Apple logo on the back of a Macbook screen ;-)

I'm having a hard time finding the orientation of my phone. I can see yellow artifacts but they're not coherent like on other LCDs. And when I look through polarized sunglasses there's no blocked angle. It must be using some alternative polarization even though it's a regular TFT screen.

There's certainly a value in not having your phone screen dimmed by sunglasses.

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