An LED matrix panel covered with a 3D printed box of slats, blocking the light from all but a narrow strip (of Rick Astley)
https://files.mastodon.social/media_attachments/files/111/005/149/332/436/481/original/910172cf10f78b77.jpeg
This is the current approach for reducing the horizontal field of view of the screens - a big heavy box o' slats. I'd like to make a lenticular array, but that's a whole side quest.
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