Graphic information display using masks - has slotted outer cover with rotational elements comprising sectors with varying optical properties

摘要

A side cross-sectional view of the display device, consisting of an outer cover with visible slots. Rotational elements behind the slots are turned to present different patterns. The rotational element (5) is constructed from a transparent cylinder divided into sectors, including sector (13c) coated with luminous paint, sector (13a) which is opaque, and a transparent sector (13). The light source (8) and the rotational element (5) are powered from solar cells (6) or similar. Pref. the rotational elements are operated by ratchet devices with magnetic coils or a stepper motor. ADVANTAGE - Low energy consumption.