Blu-ray 3D titles are not field sequential; they're "frame-packed." Basically each frame includes a "main" frame and a second frame representing the other eye's view, specially formatted so that only the differences between that view and the other needs to be encoded. So an active 3D set's method of flashing back and forth isn't any more faithful to the encoding process than a passive TV.
On a passive, 1080p 3D TV, a Blu-ray 3D title will always display at 1920x540 per eye. Passive 4K 3D TVs can display the full 1920x1080 per eye. Active 3D TVs will always display the full 1920x1080 per eye.
The only way you'll ever end up with 960x540 on a passive TV is if the source itself is actually encoded in side-by-side format, which is not part of the Blu-ray 3D standard. Some "3D" Blu-rays are encoded this way, but as far as I know it's only a handful of budget niche titles like nature documentaries and such. The primary sources of side-by-side 3D would be on demand 3D programs from cable or satellite services.
I'm not aware of any 3D TVs separated into vertical pixel rows instead of horizontal ones.
|