Abstract: A display apparatus is provided that includes an array of pixel elements, a control arrangement, and a drive mechanism. Each array can display a selection of colors. Each pixel element is mounted at one end of an individual support member. Each support member can be displaced in forwards and reverse directions, and is hollow and has a longitudinally extending series of projections on an interior surface thereof. The control arrangement is operable to control the color that is displayed by each individual pixel element. The drive mechanism includes a gear which is engaged with the projections, and a motor for rotating the gear. Rotation of the gear causes longitudinal movement of the support member with respect to the drive mechanism.