In general, in one aspect, a three dimensional (3D) display includes an optical stack, a backlight, panel electronics and a backlight driver. The optical stack is to present left eye and right eye images. The backlight is to illuminate the optical stack so the left eye and right eye images are visible and to provide signals for synchronizing the image illuminated on the optical stack with shutter glasses worn by a user to enable a left eye to view the left eye images and a right eye to view the right eye images. The panel electronics are to generate the left eye and right eye images on the optical stack. The backlight driver is to control operation of the backlight.