| 摘要 |
PROBLEM TO BE SOLVED: To prevent a luminous part from being shaded by another light source even a light source of small luminance is emitted, by arranging a first luminous device on a position near to the luminous part than a second luminous device seeing from the luminous part, or at the same distance. SOLUTION: Green LED lamps 11G for constituting a first luminous device emit the luminous surfaces (luminous parts) of the lamps pale wholly, that is, at relatively small luminance and for this purpose, the number of the lamp 11G are small compared with that of red LED lamps 11R. The lamps 11R, constituting a second luminous device for informing the condition of brake-on to a vehicle in rear, are arranged relatively many to ensure the strong luminance of red luminescence in their luminous surfaces. In addition, the lamps 11R and 11G are arranged at the same distances seeing from the luminous surfaces consequently the lamps 11R are not shaded when the lamps 11G of weak luminance are emitted too. |
