Patent ID: 6773150
Filing Date: 2004-08-10
Classification: F21S

Abstract:
A lighting device for a vehicle, said light device comprising a light source (12) and a reflector (10), wherein said reflector (10) has a reflecting surface (16) with a basic shape formed so that light generated by the light source (12) is reflected from the reflecting surface (16) as a light beam and said reflecting surface is provided with a wave structure comprising a plurality of alternating successive scattering wave sections (32; 42) and concentrating wave sections (34; 44) superimposed on the basic shape of the reflecting surface, and wherein each of said scattering wave sections (32; 42) has a central line (33; 43) extending longitudinally therein on the reflecting surface and a width (b) perpendicular to said central line (33; 43) thereof, each of said concentrating wave sections (34; 44) has a central line (35; 45) extending longitudinally therein on the reflecting surface and a width (c) perpendicular to said central line thereof, and said width (b) of said scattering wave sections (32; 42) is substantially larger than said width (c) of said concentrating wave sections (34; 44), so that the light beam reflected by the reflecting surface (16) is made uniform, wherein said light beam reflected by the reflecting surface (16) has an upper light-dark boundary including an approximately horizontal section (54) and a climbing section (56) climbing upward from said horizontal section (54), the reflection surface (16) has one part (17) reflecting light which produces the climbing section (56) of the light-dark boundary, the wave sections (32, 34; 42, 44) in said one part (17) of the reflecting surface (16) are arranged, so that the central lines (33, 35; 43, 45) of the wave sections (32, 34; 42, 44) in said one part (17) of the reflecting surface (16) extend at least approximately perpendicular to the climbing section (56) of the upper light-dark boundary, and the wave sections (32, 34; 42, 44) in a remaining part of the reflecting surface (16) not including said one part (17) are arranged, so that said central lines (33, 35; 43, 45) of the wave sections (32, 34; 42, 44) in said remaining part of the reflecting surfaces (16) extend at least approximately vertical to the horizontal section (54) of the upper light-dark boundary.