| 摘要 |
<p>PROBLEM TO BE SOLVED: To shine the entire circumferential edge of a number plate nearly uniformly by one light source. SOLUTION: A back plate part 2 and edge part 3 are composed of a light conductive material and one light source bulb 5 is arranged on the back plate part 2 and a luminous surface 6 is provided on its edge 3 and a light leak prevention surface is provided except the luminous surface 6 and light amount control means 81-83 are provided on the back plate part 2. As this result, when one light source bulb 5 is turned on, the light from the light source bulb 5 is conducted inside the back plate 2 and edge 3 and puts out from the luminous surface 6 to the outside and then the luminous surface 6 shines. In this time, the entire periphery of the luminous surface 6 is made to shine by one light source 5 nearly uniformly by the light amount control means 81-83.</p> |
