What is this thing?

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I took apart a giant projection TV and there were a bunch of these lining the screen mount. (lemmy.world)

submitted 9 months ago by [email protected] to c/[email protected]

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I feel like they probably have something to do with light level detection or infrared signal receiving but I genuinely have no idea. They could just as likely be part of the sound system for all I know.

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[–] [email protected] 5 points 9 months ago

Looking up 3D comb filters, I found this:

https://www.edn.com/revisiting-the-analogue-video-decoder-brushing-up-on-your-comb-filters/

My guess is this is a CRT TV, and these sensors precisely measure the timing of the scan line in the overscan regions (off the sides of the display), and allow the TV to make adjustments.