Patent ID: 8801250
Filing Date: 2014-08-12
Classification: F21S,F21W

Abstract:
1. A vehicle lighting device comprising: a bulb; a projector lens provided in a front direction of the bulb, the projector lens having an optical axis in a front/back direction and having a focus between the projector lens and the bulb; a first reflection surface provided in a back direction of the projector lens, the first reflection surface configured to reflect light from the bulb toward the projector lens and to collect light, which is reflected by the first reflection surface, substantially at the focus of the projector lens; a shade which includes an upper rim, the upper rim being movable between a light blocking position where the upper rim is substantially at the focus of the projector lens, and a retracting position where the upper rim is spaced away from the focus of the projector lens in a downward direction; a second reflection surface provided in a back surface of the shade, the second reflection surface configured to reflect a part of the light, which is reflected by the first reflection surface and is travelling toward the projector lens, in the downward direction, when the shade is in the light blocking position; a third reflection surface provided below the focus of the projector lens, the third reflection surface configured to reflect light, which is reflected by the second reflection surface, in the front direction to allow light which is reflected by the third reflection surface to be emitted in the front direction in such a way that the light which is reflected by the third reflection surface passes below the projector lens, when the shade is in the light blocking position; and a pair of left and right fourth reflection surfaces provided below the focus of the projector lens, the pair of fourth reflection surfaces configured to reflect the light, which is reflected by the second reflection surface, in a diagonally forward right direction and a diagonally forward left direction, respectively, to allow light which is reflected by the pair of fourth reflection surfaces to be emitted in the diagonally forward right direction and the diagonally forward left direction in such a way that the light which is reflected by the pair of fourth reflection surfaces passes below the projector lens, when the shade is in the light blocking position, wherein when the shade is in the light blocking position, an area illuminated with the light reflected from the third reflection surface and the pair of fourth reflection surfaces is below a horizontal plane passing through the optical axis of the projector lens, so that a first light distribution pattern of a low beam is formed, wherein when the shade is in the light blocking position, an area illuminated with the light which is reflected by the first reflection surface toward the projector lens and is emitted through the projector lens in the front direction is below the horizontal plane passing through the optical axis of the projector lens, so that a second light distribution pattern of a low beam is formed, wherein when the shade is in the light blocking position, at least a portion of the area illuminated with light reflected from the third reflection surface and the pair of fourth reflection surfaces overlaps at least a portion of the area illuminated with light which is reflected by the first reflection surface toward the projector lens and is emitted through the projector lens in the front direction, and wherein the third reflection surface is formed around the fourth reflection surface on the right, left and lower sides thereof.