| 摘要 |
The present invention relates to an electric lamp ( 1 ) for vehicle headlights with low-beam function comprising a light source ( 2 ) emitting visible light ( 4 ), a transparent envelope ( 3 ) having an exterior surface ( 3 ') and an interior surface ( 3 '') enclosing said light source ( 2 ), at least one multilayer structure ( 7 ) provided on the exterior surface ( 3 ') of the envelope ( 3 ), wherein (a first light ( 5 ) substantially with a bluish-white color transmits the multilayer structure ( 7 ) directly and a second light ( 6 ) substantially with a yellowish color transmits the multilayer structure ( 7 ) after being reflected at the multilayer structure ( 7 ), wherein the multilayer structure ( 7 ) being of none light absorbing materials is provided in such a way, that the color of light of a standard light source A being reflected at the multilayer structure ( 7 ) lies within a triangle in the CIE 1931 Yxy color space defined by the x, y coordinates (0.58; 0.42), (0.58; 0.30) and (0.70; 0.30) wherein the lightness Y is in the range of 2.5<=Y<=17.5, wherein none of the emitted visible light ( 4 ) is absorbed by the multilayer structure ( 7 ). |
