| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lightweight and inexpensive lighting system, which can obtain uniform surface illuminating light with a wide area on either both surfaces or one surface thereof. <P>SOLUTION: The lighting system includes a pair of reflecting plate members 4A and 4B opposed to each other with a predetermined gap. The distance between the first and second reflecting plate members G2 and the distance between each of the reflecting plate members and a diffusion plate member G4 are set so as to be G4<G2. A point light source array 3 provided on a substrate 3A is divided into a plurality of adjacent point light source groups, and each of the reflecting plate members 4A and 4B is segmentalized into a plurality of small reflecting plates corresponding to the plurality of groups. Each of the plurality of small reflecting plates is formed, corresponding to each point light source, in a single reflecting/transmitting pattern such that the reflectance is high and the light transmittance is low at a point close to the individual point light source, and the reflectance is gradually reduced with distance from each point light source while the light transmittance is gradually increased. <P>COPYRIGHT: (C)2011,JPO&INPIT |
