Ambient Light Sensor

Adding an ambient light sensor for automatic LCD panel backlight brightness adjustment has never been easier. Up until now we used the Autobrite board (this is still available) as an interface to enable automatic backlight adjustment – now it is possible to do it with a light sensor connected directly to the controller board.

When designing a monitor a light sensor can be placed in a suitable location to detect changes in lighting and adjust the LCD panel backlight brightness appropriately. In addition we can enable a custom firmware modification to add a delay, that way the backlight brightness only adjusts if there is a persistent change to the ambient light.


Using an updated version of the TCP-IP Serial Utility that will be released late November 2019 it will be possible to set thresholds for ambient light and the LCD panel backlight adjustment.

ambient light backlight adjustment

SVX-4096 & SVX-4096-120

The attached app note (see download link below) applies to Digital View SVX-4096 and SVX-4096-120 LCD controller boards, it shows the connection of a light sensor and the setup of the levels. Note: When choosing a light sensor, use a 2 pin type. The levels can be adjusted as described in the application note to suit the particular model chosen.

light sensor

Download the appnote here:

Upcoming models with 2 pin light sensor support:

  • SP-4096-120
  • SVX-1920-PRO


For users wanting to add automatic light sensor backlight adjustment support to other Digital View LCD controller boards, we also have the Autobrite board.