According to the Q&A section on Panasonic's site under your TV model number it says:
In order to register your Bluetooth device, you need to go to the Setup Menu and select "Bluetooth settings". From here, you will select "Bluetooth devices" and follow the directions on the screen to register your device. If the device does not register, we suggest trying another Bluetooth device to verify if any Bluetooth device can be register with the TV.
That being said, I wouldn't necessarily count on Panasonic having the right bleutooth drivers/profiles to support using bluetooth headphones. I think the bluetooth is mainly just for the 3D glasses, I could be wrong though. Suprisingly the manual doesn't say much of anything about menus and bluetooth section, so I don't really know.
Actually I just noticed at the bottom of the tech specs page it does mentions A2DP support, so you may be in luck.