Why does this kind of screen chenge color at different angles?

sarmale@lemmy.zip to Technology@beehaw.org – 66 points –
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That looks like a type of Thin film interference, like you’d see on an oil slick or a soap bubble. Wikipedia says:

Thin-film interference is a natural phenomenon in which light waves reflected by the upper and lower boundaries of a thin film interfere with one another, either enhancing or reducing the reflected light.

I’d guess the display uses a thin film on one of its layers causing this rainbow interference pattern that shifts depending on viewing angle.

So if that’s actually just a guess, I’m impressed, and you must have some experience in thin-film lol.

LCD panels actually use a thin film of silicon (I think it’s silicon) over each pixel. And cheap panels using TN technology often have this issue and very poor viewing angles.

like you’d see on an oil slick or a soap bubble.

Or roast beef!