A method for driving a dark ring of a liquid-crystal-on-silicon display is provided to prevent the fringe effect due to the constant voltage difference between the dark ring and the adjoining pixels within the LCOS display. Also the orifice to the valve is mounted on top of the strainer so gravity will help in keeping any debris that might get through the filter screen from entering and causing the valve to fail. The bi-stable, rewritable colorant is highly energy efficient, requiring energy only to change an image, not to hold or illuminate it. The controller is further configured to set a respective pressure threshold for each of the sensor zones above which the controller activates the vehicle horn based on the touching characteristic. A view-through conversion occurs when, first, a user is exposed to an online ad, but does not select it, but the user later visits the advertiser’s Website and a \u201cconversion\u201d occurs within a certain period.