| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting switch which can enhance uniformity of brightness distribution in a light-emitting part, and furthermore whose reduction in brightness is small as a whole.SOLUTION: A light-emitting portion composed of a light source 22 and a light deflection plate 24 is housed in a lighting switch. On a surface opposite to a surface facing the light source 22, the light deflection plate 24 has numerous prism-shaped fine optical patterns 30 whose cross section have a substantially triangular shape. Light transmission parts 32, 33 composed of a curved surface or a flat surface are provided on the apex or the bottom of the optical patterns 30. |
