Abstract: A control device is described that has a controller, an optical diffuser and a lens assembly. In use, the optical diffuser is positioned in front of an electronic display and the lens assembly projects an image displayed on the electronic display onto the optical diffuser. Also, a keyboard and/or control panel having one and/or more of the control devices is presented.

Abstract: The present application relates to a method of at least substantially synchronizing data output from at least first and second graphics cards (1, 2). A synchronization difference between the first graphics card (1) and the second graphics card (2) is determined and a correction signal (41) generated based on the synchronization difference. The correction signal (41) is supplied to the second graphics card and the operating frequency of the second graphics card (2) is adjusted in response to the correction signal (41). The application also relates to a system (100) for processing images.

Abstract: A filter unit for filtering particulates and other foreign matter from a water supply, comprising a filtering chamber. At least a portion of an exterior of the filtering chamber being provided with filtering chamber in use. The mesh being sized to filter particulates and other foreign matter from the water. The filter unit further comprising an outlet through which filtered water exits the filter unit, and a rotatable member located within the filtering chamber, the rotatable member having at least one outlet spaced from an internal face of a mesh. The axis of rotation of the rotatable member being such that the at least one outlet traverses at least a substantial portion of the internal face of a mesh.