A screen system for use in a window of a vehicle. The screen system comprises a screen, a spool mounted to a leading edge of the screen, a housing configured to be mounted at a first edge of the window, and one or more bands that are operatively connected to the screen and configured to apply a biasing force to the screen. The screen is movable between a retracted position and an extended position. The retracted position comprises the screen rolled onto the spool with the screen and the spool positioned in the housing at the first edge of the window. The extended position comprises the screen extending across the window with the leading edge positioned at a second edge of the window and the first edge positioned at the first edge of the window and with the one or more bands extending across the window and applying the biasing force to the screen.

A method is provided for operating a roller blind assembly, wherein the roller blind assembly is configured for direct driving of a winding tube and a rollo screen movable between a closed position and an opened position. The method includes operating a motor to drive the winding tube of the rollo assembly, setting a first threshold based on an operating condition, and monitoring an operating parameter indicative of speed of the winding tube. The method further includes assessing when the operating parameter crosses the first threshold, and generating a trigger signal based on the assessment of the operating parameter.