Originally Posted by DrFaxe
I've read that You're going to test the F8500, especially ABL behavior. Any news on that? As I'm curious about the results.
That was supposed to be today but we cancelled the appointment as the display might be exchanged. I'm a seasonal resident and will be moving north on Sunday where I have one scheduled. I'll try to get to that one soon.
There is a pattern specifically designed to test for ABL and it is easy to use. Download the free AVSHD disc here
. In Miscellaneous Patterns, section A, look for the A5 Dynamic Brightness Pattern. If there is ABL working you cannot miss it as the Average Picture Level (APL) Increases.
Patterns Manual explaination: Primarily this pattern is included to quickly observe any possible
changes that might occur as APL varies. The pattern also includes a
center mark (+) for aligning measurement equipment in the middle of
the screen. When the background changes, that alters APL. The
pattern can show if your TV has a tendency to adjust light output
depending upon the on-screen APL, and it may allow you to observe
some effects of certain settings that affect light output.
With TVs that have an adjusting iris or backlight, you might notice that
the grayscale bars in the lower right corner could change shade
depending upon the APL. On some displays the bars in the lower right
corner might even blend together at different APL levels, which would
indicate a loss of detail. Ideally the grayscale bars in the corner of this
pattern would remain about the same shade regardless of the
background currently displayed, and the bars would be distinct from
each other and never blend together, but that might not be possible
with all displays. The pattern can simply allow you to observe how
your display may react differently depending upon APL and chosen
settings. For example you may find that by turning off an adjusting
iris, or some other type of dynamic setting, the grayscale bars no
longer have the same amount of shift in brightness depending upon
the current APL.