| 摘要 |
PURPOSE: A color conversion sign board is provided to irradiate a light edited from a lamp to a downward and clearly indicate in a night time. CONSTITUTION: A color changing sheet(21) is included inside a case(10). The color changing sheet indicates the color by a solar ray in a day and is changed by the light irradiated in a night. A text sheet(22) is laminated on an upper side of the color changing sheet. The text sheet indicates the color opposite with the light indicated on the color changing sheet by the irradiated light. |
