Escape route lighting device for public building, has thin-film solar cell provided with section to form symbol and transmit light of light source, where light source is arranged below disk and section is covered by transparent film

摘要

The device has a light source (15) e.g. LED, embedded in a housing (11) in floor of a room. The light source is arranged below a transparent disk. An accumulator of a thin film solar cell is supplied with energy. The thin film solar cell is extended up to leaving an edge portion (19) over entire underside of the transparent disk. The thin-film solar cell is provided with a section (20) to form a symbol and transmit light of the light source. The section is covered by a colored transparent dyed film.