How to turn OFF LCD Backlight when screensaver kicks in

How to turn OFF LCD Backlight when screen saver kicks in? I have one I/O pin connected to LCD power and LED backlight.

I would like to turn them off when the screen saver kicks in. How to do that?

I am using WEC7 OS image 1.1 beta 4

You can configure that pin as backlight pin using the BL_GPIO and BL_POL settings, as described here:
http://developer.toradex.com/knowledge-base/display-driver-registry-settings