Any 3D TV on the market today has the ability to tell it you are displaying 3D content, depending on some variables the television automatically recognizes it or doesn’t.
That said if you have properly formatted your side/side or top/bottom content, in your tv go to the 3d menu, where you can manually turn on 3d mode, and there is on the three sets i use (Samsung/Panasonic/Sony) an option to tell the set what signal your feeding (side/side, Over/under) once 3d mode is on, and you select the correct display, the set will process the image accordingly. As long as you have formated your output properly.
I have done this many times for screening 3d off an encore blu ray using a ps3 and a standard blu ray player as well.