I took apart a giant projection TV and there were a bunch of these lining the screen mount.
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.
It states "3D COMB FILTER" and is part of the picture in picture mode. It's probably an optional upgrade, which is why it's on a separate board if I were to guess.
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.
Other thoughts: S3001 implies that it’s some kind of switch (also present is D3001 and CN3001 for diode and connector).
One thought is reed switch? Maybe it’s not optical at all. Were there any magnets near this sensor inside the TV? Maybe it’s a way to determine that the screen is fully mounted/aligned correctly?
Is there a reason you're being disrespectful? If someone lines up parts of their TV like op did for the picture in this post, they are probably not on drugs right now.
There are a lot of really useful components in there that I already understand. The speakers, the lenses, even the cooling oil used on the projector tubes can be repurposed.
I use the actual shell of the TV as a rolling cabinet since the wheels are still in great shape. I'm working on a water heater to take advantage of the massive fresnel lens. There was a great deal of junk in there though.