Embodiments of the invention provide a venturi valve and control system for use in an indoor environment to regulate air flow. One aspect relates to a browse window that allows a user to navigate through and select images that are related to media items. The organic electroluminescent device further comprises a first light transmissive optical compensation layer interposed between the transparent anode and the substrate, wherein the first light transmissive optical compensation layer is substantially made of a transition metal oxide. The ends of the switches in the column P1 are connected to ground.