SURFACE LIGHT EMITTING DEVICE

摘要

PURPOSE:To operate illumination of a large area with one piece of light source by projecting and emitting the light from a light source supplied via a light transmission hose with a planar or curved surface light emitting surface and further a large area region. CONSTITUTION:This surface light emitting device comprises the light source 1, the light transmission hose 2 and a light emitting member 3 and is used on the roof of a building 4, etc. The light source 1 emits light of a specific color (wavelength) and the light transmission hose 2 is formed by packing a viscous liquid-like core into a high-polymer clad worked to a flexible pipe shape. Both ends of the clad are closed by transparent windows. The light is totally reflected at the boundary of the core and the clad and the incident light is transmitted to the other end by using the clad having the refractive index lower than the refractive index of the core. The light emitting member 3 is mounted to the advertisement 5 and the light rays of the respective colors supplied from the light transmission hose 2 progress in the core. These light rays partly transmit the inside of the clad without totally reflecting on a part of the inside peripheral surface The right rays are thus efficiently emitted from the outer peripheral surface.