(I posted this last week in the "3D" display section because, yeah, this unit is a 3D, not that I care for that particular feature, but because I could not find "LED" anywhere instead. That post got like zero responses in a week. Now I think I've figured out that "LCD" includes these "LED" displays, so I am going to repost here. Please forgive the duplication).
I have recently installed a Samsung Series 6 46" model 6400 LED (3D) display (it replaces my 10 year old Samsung DLP - a display so old it doesn't even have HDMI!).
I am noticing that in dark scenes in movies, the brightness of the picture fluctuates. This doesn't seem to happen in brightly lit scenes, but once the action moves into a dark setting, the brightness begins to fluctuate -- sometimes within a shot, sometimes when the action cuts to a new angle.
My source is a TiVo Series 3 (HD). I do not see the problem with recorded video programs (like sports). Only movies, only dark passages.
The manual/tech support suggests turning off "Eco Sensor" and "Energy Saver." They are both off.
A Home Theater guy at Best Buy suggested turning off Dynamic Contrast. That didn't make any difference either.
There are a lot advanced settings that I have not experimented with.
Perhaps somebody within the sound of these digits has experienced a similar issue and found a solution - or can direct me to the correct form where to post this issue....?
* * * * * * * * * * * * * * * * * * * * * *"The difficult we do right away; the impossible takes slightly longer." -- Philo T. Farnsworth, Inventor of Television <http://farnovision.com>