Let us help you identify that mysterious object you’ve found.
Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.
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.
The TV is a Sony KP-43T85T or similar. The service manual is here with on page 55 the exact part: https://www.manualslib.com/manual/772761/Sony-Kp-43t85t.html?page=55#manual
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.