Auto-Dim Brightness SP-1920 SP-4096

The Digital View SP-1920 and SP-4096 LCD controllers both support a light sensor backlight dimming function, so if the lighting reaches a set level the backlight brightness is adjusted. This is a capability built into the LCD controller customized for the brightness threshold. SP-1920 light sensor

For other Digital View LCD controllers they can use the Digital View Autobrite accessory board: https://www.digitalview.com/accessories/ambient-light.html