You don't need an adapter.
watch this, and read my instructions:
https
/www.youtube.com/watch?v=wHO1CReFOLU
go here if the code in the video or the description (the one in the description worked for me) doesn't work for you: http

/www.askvg.com/secret-service-codes-for-sony-and-lg-tv/
find which code works for your TV, use it to enter the service menu, go to the options>engineering menu>bluetooth and turn it on... then restart the tv.
For my Samsung Smart TV (UN60H7100) it enabled me to then be able to go into the menu>sound>speaker settings and when you open TV Sound Output you should now be able to select bluetooth headphones. Then you'll see a new section for BT headphones, and you'll be able to pair them there.
enjoy!