Originally Posted by Man_Hands
I've searched and tried to find some information
on the Auto Brightness Control setting.
My understanding is that it utilizes an ambient light
sensor on the TV and changes the backlight value
based on the amount of light in the room.
What I'm confused with is the different
options of Low, Medium, and High.
Are these sensitivity values?
Auto Brightness Control:
"Select Off, Low, Medium, or
High. The auto brightness control
feature detects the light levels in
the room (using the ambient light
sensor) and automatically adjusts
the backlight for the best picture."
I have my Backlight set at 50. (Auto-Brightness - Really, it's Auto-Backlight - must be OFF to manually adjust the Backlight values.)
I then adjust it as necessary to Low, Med, or High... and sometimes OFF for maximum light at that 50 setting.
It appears to work as such: Depending on room light, the level compensates for the selected Backlight level - Low, Med, or High. Not a sensitivity range. So, if you select Medium, that level is trying to be maintained if the room lighting changes - a lamp that's turned off or on or some clouds roll in, etc. Same for Low or High. It just brighter or dimmer.
To slide the whole Brighter/Darker scale up or down, select the Backlight lower (20) or higher (75) when using Low/Med/High.
Is that clear as mud?
I tested it with a flashlight. It's a slow change so it's doesn't 'over-react' with sudden room light changes.
Some 'purist' will tell you to leave it OFF and set it for Day and Night values. I suppose it could be 3: Sunny, Cloudy, and Night. That would be 3 different Custom Picture Modes. Otherwise, just switch between Low/Med/Hi/OFF.
With HDR, some say leave the Backlight at 50. Whether that's for Dolby Vision and/or HDR-10... I don't know. I just leave mine at 50.