Originally Posted by dblang
My Sharp LC46D64U LCD TV (US model) can switch between 60 Hz refresh (broadcast TV) and 48 Hz refresh (1080p24 from a blu-ray using 2x2 pulldown). This means that LCD TVs with variable refresh rates are definitely doable. Also, you do not get any flicker from an LCD running at 48 Hz due to the sample & hold nature of the LCD display (A plasma TV would flicker unacceptably).
True - but you have the inherent LCD blur at lower frame rates because of the hold-type-nature.
In Europe, they usually speed up the movie by 4% so the player outputs 1080p50 using 2x2 pulldown. There probably are some European TVs that can switch between 48 and 50 Hz (or between 96 and 100 Hz).
One needs to differentiate two things in Europe: SD and HD material.
For SD material all European sets have to accept 50 Hz material because the color systems (PAL or SECAM) are based on 50 Hz similarily like NTSC is based on 60 Hz.
Examples for SD are tuner reception or DVDs - the latter indeed suffer from the (in Europe) well-known "PAL speedup" like Daniel described above. While the movie is sped up by 4% and, unless electronically corrected, the audio is higher pitched compared to movies in the cinema, us Europeans don't have the inverse 3:2 pulldown with the well-known judder.
Many manufacturers made their TVs also accept 60 Hz video (to use the same components or software) so there is an unofficial video format called "PAL 60". When fed with RGB video from a good DVD player one can show US DVDs on such a European set (or setup a games console/PC to use 60 Hz mode).
For HD the whole affair is different:
To get a "HD ready" logo in Europe the manufacturer has
to make the TV set accept 720p and 1080i with 50 and
Most (all?) Full HD sets also accept 1080p with 50 and 60 Hz - 24p was added later, too, as us Europeans, not used by the 3:2 pulldown, protested drastically and didn't buy many HD sets...
While not required I'm assuming that the LCDs offering 100 Hz modes in Europe will also switch to 120 Hz to simplify matters (as they have to accept 60 Hz anyway).
The implications are clear: The manufacturer can use the same methods to display HD material like on a bog-standard US HD-TV set. The same results should be achieved and are expected because, like above, manufacturers try to use the same tech in different territories to save costs.
all European Blu-ray players are also capable of playing 60 Hz material.
Therefore one should
be able to watch all US Blu-ray disks on European equipment like a person in the USA would. If the Blu-ray has 24p-material on it but the TV can't accept 24p then it would have to use the inverse 3:2 pulldown, too.
(Everything above to the best of my knowledge, please correct if necessary!)