Projection head lamp for cars
First Claim
1. A projection type headlamp, comprising:
- a substantially oval reflector;
a light source disposed at a first focal point of said reflector;
a projection lens disposed in front of said reflector; and
shade means for cutting at a predetermined position a part of light beam emitted from said light source and reflected by said reflector to form a desired light distribution pattern, said shade means being provided between said reflector and said projection lens in the vicinity of a second focal point of said reflector and substantially at a focus point of said projection lens, said shade means via motor and gear means rotating along a horizontal axis thereof which is perpendicular to an axis of said light source, said shade means comprising;
a first shade member having at least two plates spaced apart from each other by a predetermined angle; and
a second shade member having at least two plates spaced apart from each other by a predetermined angle,said blades of said first and second shade members successively positioning at said predetermined position during the rotation of said shade means, whereby said part of light beam reflected by said reflector always cutting generally by one of said plates.
1 Assignment
0 Petitions
Accused Products
Abstract
A projection head lamp for vehicles comprises a substantially elliptical reflector 14, a light source located at the first focal point of the reflector 14, a projection lens 16 disposed in front of the reflector 14, and a shade 20 located at a position near to the second focal point and the focal point of the projection lens 16, the shade 20 intercepting light beams going from the reflector 14 toward the projection lens 16. The shade 20 may be turned about the horizontal shaft. To adjust the beam distribution pattern, the shade 20 is turned. The shade 20 consists of left and right shades 21 and 22, which are separated and horizontally extended when seen from the point right under the optical axis. The shades 21 and 22 have pairs of shade plates 212 and 213, and 222 and 223, of which the extended parts extending along the horizontal shaft overlap with one another.
68 Citations
8 Claims
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1. A projection type headlamp, comprising:
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a substantially oval reflector; a light source disposed at a first focal point of said reflector; a projection lens disposed in front of said reflector; and shade means for cutting at a predetermined position a part of light beam emitted from said light source and reflected by said reflector to form a desired light distribution pattern, said shade means being provided between said reflector and said projection lens in the vicinity of a second focal point of said reflector and substantially at a focus point of said projection lens, said shade means via motor and gear means rotating along a horizontal axis thereof which is perpendicular to an axis of said light source, said shade means comprising; a first shade member having at least two plates spaced apart from each other by a predetermined angle; and a second shade member having at least two plates spaced apart from each other by a predetermined angle, said blades of said first and second shade members successively positioning at said predetermined position during the rotation of said shade means, whereby said part of light beam reflected by said reflector always cutting generally by one of said plates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification