| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting plate which displays two colors by switching and has stable luminous intensity evenness of a light emitting surface by enlarging areas of reflecting surfaces or refracting surfaces which guide light from each light source to the light emitting surface. <P>SOLUTION: The refracting surface 1d is arranged an bottom surface of the lighting plate on the light emitting surface 6a side and the reflecting surface 1c is arranged on an upper surface of the lighting plate on an opposite side to the light emitting surface 6a, wherein light which is guided into the inside of the lighting plate 1 from the first light source 3 is reflected by the reflecting surface 1c and is guided to the light emitting surface 6a, and light which is guided into the inside of the lighting plate from the second light source 4 is refracted by the refracting surface 1d and is guided into the light emitting surface 6a. <P>COPYRIGHT: (C)2004,JPO |
