CRT TVs refresh at 50Hz or 60Hz (near enough) depending on region.

Since a TV program will only contain images (interlaced) at that rate -
or frequently less - a TV that purports to offer a higher refresh rate
will have to create the extra images by some kind of interpolation. If
it does a bad job, then the result will be unwatchable regardless of how
high the refresh rate is.

Sylvia.

It can get more complicated than that. Dolby has a new thing out HDR LCD
that on the fly modulates the LED backlights for brightness in groups.
that was not possible with CFL LCD backlights.

http://www.dolby.com/uploadedFiles/z...l-overview.pdf


bob