The invention provides an aqueous composition that includes a hydroxy-substituted mono-, di-, or tri-carboxylic acid; phosphoric acid; a surfactant; and water. A plurality of organic thin film EL display elements are formed on a single transparent substrate. Highest priority is assigned to override commands categorized as being related to occupant safety, second-highest priority is assigned to override commands categorized as being related to vehicle safety, and third-highest priority is assigned to override commands categorized as being related to occupant comfort. The mounting portion defines a first portion of the aspiration channel. Further, a sufficient fixing strength can be provided to pile yarn rows bonded and fixed to the substrate surface although the pile yarns are fixed by fusion of the flat plate-like substrate.