Image display structures and methods of forming image display structures are provided. At least the second plate has at least one groove formed therein. The apparatus may be designed to be reusable or disposable and can be used in a transmission or reflectance mode, or both. The controller detects that one or two or more of the plurality of second images are selected on the basis of the information about the position. The driver is configured to scan the key matrix to decode the non-overlapping signals to generate an event update corresponding to a direction of rotation of the quadrature signal generator.