NEC LCD8205 - MultiSync - 82" LCD Flat Panel Display Control Manual page 63

Dimming Control (7.40 ~ 7.42)
Auto dimming control mode. Refer to diagram of DBLC
On : Dimming varies by light ambient level
Off : Dimming varies by brightness of image settings
MAX_ILLUMINANCE
MIN_ILLUMINANCE
AUTO_DIM
Max dimming ambient level
Min dimming ambient level
Apply auto dimming
Setting Value = Ambient Level (by LUX) / 100
Setting Value = Ambient Level (by LUX) / 10
0 : off, 1: on