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Vehcile headlamp with both low-beam and high-beam and devoid of moving parts

A headlight, low beam technology, applied in the direction of headlights, light sources, electric light sources, etc., can solve problems such as easy failure

Active Publication Date: 2013-12-04
OSRAM SYLVANIA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A potential disadvantage of this known projector lamp configuration is the inclusion of moving parts that are more prone to failure than relatively stationary parts

Method used

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  • Vehcile headlamp with both low-beam and high-beam and devoid of moving parts
  • Vehcile headlamp with both low-beam and high-beam and devoid of moving parts
  • Vehcile headlamp with both low-beam and high-beam and devoid of moving parts

Examples

Experimental program
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Embodiment Construction

[0019] As used herein, the directional terms "upper", "lower", "top", "bottom", "side", "transverse", "longitudinal", etc. are used to describe the absolute and relative orientation of particular elements. For these descriptions it is assumed that the light exits through the "front" of the headlight, with the spatial distribution centered around a longitudinal axis generally perpendicular to the front of the headlight and the light generally parallel to the ground. These descriptions include small angle deviations from orthogonality to allow for glare reduction for oncoming traffic. It will be appreciated that while such descriptions provide orientations that would occur in typical use, other orientations are indeed possible. As used herein, the descriptive terms indicated still apply if the headlights are pointed upwards, downwards, horizontally, or in any other suitable orientation.

[0020] Automotive headlights produce both low and high beam output and do so without any m...

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PUM

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Abstract

A headlight produces low-beam and high-beam outputs without requiring moving parts. Low-beam LED array (7) near first focus (F1) of ellipsoidal reflector (3) directs light laterally against reflector (3) which directs it toward second focus (F2) of reflector. Cut-off edge (4; 5; 63) near second focus forms a bright / dark edge in low-beam output. Cut-off edge is a vertically-oriented light baffle (4) whose top edge forms the bright / dark edge. Cut-off edge is a horizontal light occluding member (16) whose front edge (63) forms bright / dark edge. Cut-off edge is a corner of a heat sink (200). Cut-off edge is located near focal point of lens (2) which transmits low-beam output with a bright / dark edge. Stationary folding mirror (5) near second focus of reflector directs light from high-beam LED array (8) to lens (2). Additive light reflecting from folding mirror (5) transmitting through lens (2) forms high-beam output lacking a bright / dark edge.

Description

technical field [0001] The present disclosure relates to a projector-style automotive headlight that emits both a low beam output and a high beam output. Background technique [0002] Cars are equipped with both low and high beam outputs from their headlights. The low beam output is usually angled downward and slightly away from oncoming traffic in order to reduce glare to oncoming traffic on the opposite side of the road. High beam output is brighter and there is no directional requirement for low beam output, and this is only suitable when alone on the road. Switching between low and high beams is not as straightforward as making headlights brighter or dimmer due to the different angular requirements of the low and high beam outputs. [0003] For many years, until the mid-1980s, cars were commonly equipped with separate headlights for low and high beam output. Low beam and high beam headlights are mounted adjacent to each other on the front of the vehicle and are proper...

Claims

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Application Information

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IPC IPC(8): F21S8/10F21V13/12F21W101/10F21Y101/02
CPCF21S48/1258F21S48/1159F21S48/328F21S48/1388F21S41/255F21S41/321F21S41/43F21S41/60F21S41/663F21S41/148F21S45/48F21S41/365B60Q1/04
Inventor L.M.赖斯T.特斯诺
Owner OSRAM SYLVANIA INC
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