Last night I noticed that there's some flashlighting in the lower corner of my Samsung LCD. I already ran through a calibration with an Eye-One and HCFR and arrived at some decent settings. To make the flashlighting less visible, I just lowered my BL from 4 to 3. My light output was originally around 36 or 37 ftl with a 100% white window. Since it's probably lower now, I also bumped up contrast from 98 to 100. Will these changes affect my overall calibration? I thought I read somewhere that the backlight shouldn't affect other settings.

I suppose the only way to know for sure is to take another round of measurements.

There will be a tiny change from raising the contrast, assuming you are not in danger of white crush. The backlight shouldn't change much on your Samsung, but some sets can show a slight shift.
So your changes probably caused shifts that would be measureable, but it's probably not enough to be visible.

Thanks for the info. I have a feeling the light output is going to be around 30 now (I'll measure later), which might be a little dim? Although, isn't that the THX recommended value?

Not sure what else I can do besides lower the backlight to get rid of the little flashlighting problem?

Thanks for the info. I have a feeling the light output is going to be around 30 now (I'll measure later), which might be a little dim? Although, isn't that the THX recommended value?

Not sure what else I can do besides lower the backlight to get rid of the little flashlighting problem?

So you spent the time to cal with equipment, then altered settings by eye/guess...

Break out the probe and take measurements with the new settings. That'll tell you exactly how things've changed.

On my Sammy B650 I found that adjsuting the backlight affected the gamma curve a bit but no noticeable difference on other measurements (except light output of course, LOL). I found that a setting of 3 or 4 gave the best results though so if the B750 is the same then you should be OK.

So you spent the time to cal with equipment, then altered settings by eye/guess...

Break out the probe and take measurements with the new settings. That'll tell you exactly how things've changed.

I made some measurements, and changing the backlight between 3 and 4 didn't significantly affect the grayscale. However, at 3, my light output was a little shy of 30 ftl (even with contrast at 100). So, I'm back to my original settings. I'll just have to live with the tiny bit of flashlighting:cool:

I made some measurements, and changing the backlight between 3 and 4 didn't significantly affect the grayscale. However, at 3, my light output was a little shy of 30 ftl (even with contrast at 100). So, I'm back to my original settings. I'll just have to live with the tiny bit of flashlighting:cool:

You might be happier long term with the little less light output without the flashlighting. I know I would.