Abstract: A personal planetarium projection system is provided. The system may comprise a light source, a removable star disc comprising a transparent star and planet pattern, and a focus lens mechanism for focusing the light source through the star disc. The system may also comprise an optical zoom lens for projecting light passing through the star disc onto a projection surface to produce a projected image. The zoom lens enables different magnifications of the projected image.

Abstract: The present invention provides improvements to electroluminescent devices particularly useful for illuminated signs and billboards designed for use with model railroads. Electroluminescent devices disclosed in the present application provide a simulation of a billboard by raising the illuminated portion of the billboard above the location of the electrical connection. The illuminated portion appears to be appropriately separated from the electrical connection with a transparent portion. Electrical conductors pass through the transparent portion to couple to the electroluminescent electrodes without ruining the aesthetics of the final product. The electrical conductors pass through the transparent portion in such a way as to simulate struts that support the illuminated portion.