Patent ID: 7125137

Claim:
A surface light-emitting unit, comprising; a plate-shaped surface member that can transmit light, a light-conducting plate installed below said surface member, a light-emitting means having multiple light-emitting diodes of different emission colors and installed on the side face of said light-conducting plate, a light-diffusing/reflecting member installed below said light-conducting plate that diffuses and reflects the light transmitting through said light-conducting plate, an emission-color selection means for selecting said light-emitting diode to be illuminated or blinked among those provided by said light-emitting means, a roughly rectangular solid casing for providing said surface member at a top opening, said casing storing said light-conducting plate, light-emitting means and light-diffusing/reflecting member and being installed along a mounting surface including a floor or wall of a structure, and a connection part that can be connected to other surface light-emitting units installed adjacently, wherein said plate-shaped surface member is formed by a transparent glass plate with multiple projections formed on its surface at specified intervals.