US 7,077,552 B2 · Vehicle head lamp

Abstract

A lighting device unit which conducts illumination for forming an upward protrusion has a light source including a light emitting diode in which three light emitting chips are horizontally arranged, and a projection lens which projects an image of the light source toward the front of the lighting device as an inverted image. The inverted images of the light emitting chips of the light source formed respectively on a virtual vertical screen in front of the lighting device are horizontally shifted from one another. When a vehicle moves straight forward, the first light emitting chip is turned ON; when the vehicle turns leftward, the second light emitting chip is turned ON; and, when the vehicle turns rightward, the third light emitting chip is turned ON. The position where the upward protrusion is formed is horizontally moved to brightly illuminate the road surface in the traveling direction of the vehicle.

Claims14

Dependent claims

A head lamp that forms a luminous distribution pattern having a horizontal cutoff line in an upper end portion and an protrusion that protrudes upward from said horizontal cutoff line, said lamp comprising:

at least one lighting device unit that conducts illumination for forming said upward protrusion, each of said lighting device units comprising,
a light source configured by a semiconductor light emitting device having a plurality of light emitting chips horizontally arranged in a row and being forward directed, and
a projection lens, disposed in front of said light source, that projects an inverted image of said light source toward a front of said head lamp.

A lamp that forms a luminous distribution pattern having a horizontal component and an upwardly extending oblique component, said lamp comprising:

a first lighting system horizontally positioned at a lower portion of said lamp and generating a first diffuse light;
a second lighting system horizontally positioned at an upper portion of said lamp and generating a second diffuse light;
and
a third lighting system horizontally positioned at a middle portion of said lamp and generating a focused light that varies with the horizontal swinging of said lamp, said third lighting system including at least one lighting unit including,
a plurality of light emitting units each having a substantially parallelogram shape and horizontally positioned with respect to each other on an arcuate shaped plane, and
a projection lens having a shape corresponding to said arcuate projection plane, said projection lens projecting an image of said at least one lighting unit toward a front of said lamp to form said oblique component.

3 more elements

Dependencies are inferred from the claim text.

Vehicle head lamp

Life of this patent

Vehicle head lamp

Life of this patent

Abstract

Claims14