| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensively constructible illumination light communication system requiring no communication cable or laying work of optical fibers and free from such problems as limitation of band, radio wave radiation, superposition of noise, and the like, like communications utilizing a lighting line. <P>SOLUTION: Information received from a wired network terminal on the wall face, or the like, is delivered as a light signal from a light transmitting/receiving section 11 of a light communication unit 1. A lighting fixture 2 is provided with a light transmitting/receiving section 22 where light is received from the light communication unit 1 in order to acquire information, and a light emitting element 21 emits illumination light modulated according to that information. A terminal 3 can acquire the information by receiving the illumination light at a light transmitting/receiving section 31. Since communication is performed from the light communication unit 1 to the terminal 3 by irradiating light into the space, a convenient illumination light communication system requiring no communication cable or laying work of optical fibers can be constructed. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
