Patent ID: 8070339
Filing Date: 2011-12-06
Classification: F21S,F21Y

Abstract:
1. A projector headlight, comprising: a shade having a top edge; a circuit board having a mounting surface and a virtual substantially co-planar extension of the mounting surface substantially intersecting with the top edge of the shade; an LED light source mounted on the mounting surface of the circuit board and having an optical axis extending substantially perpendicular to the mounting surface of the circuit board, and the LED light source including at least one LED chip and a phosphor, wherein the shade extends below the virtual substantially co-planar extension of the mounting surface from the top edge of the shade without extending above the virtual substantially co-planar extension of the mounting surface; at least one ellipsoidal reflector having a first focus and a second focus, the first focus located substantially at the LED light source, and the second focus located substantially at the top edge of the shade; and a projector lens configured as a convex lens having both a lens optical axis and a focus located on the lens optical axis, the projector lens configured to face the shade, and the lens optical axis substantially intersecting with the second focus of the at least one ellipsoidal reflector at the focus of the projector lens and substantially intersecting with both the optical axis of the LED light source and the virtual substantially co-planar extension of the mounting surface of the circuit board located below the lens optical axis, wherein the projector lens includes a first light dispersing surface portion structure located above the lens optical axis and a second light dispersing surface portion structure located below the lens optical axis and a light transmission surface located between the first light dispersing surface portion structure and the second light dispersing surface portion structure, wherein the first light dispersing surface portion structure and second light dispersing surface portion structure disperse light to a different degree as compared to the light transmission surface when light from the LED light source transmits therethrough, and a total area of the second light dispersing surface portion structure is larger than a total area of the first light dispersing surface portion structure.