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An electric lamp

A technology for electric lamps and headlights, which is used in circuits, incandescent lamps, and parts of gas discharge lamps to achieve the effects of improving the visibility of colored light, improving visibility, and improving signal functions.

Inactive Publication Date: 2011-07-06
LUMILEDS HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that this unselected or undesired light is consumed or absorbed within the lamp, where the undesired wavelengths are consumed as heat

Method used

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Examples

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Embodiment Construction

[0026] now refer to figure 1, where a lamp 1 for reflector headlights is shown. The lamp 1 comprises a transparent envelope 3 having an outer surface 3' and an inner surface 3". A light source 2 emitting visible light 4 is inside the envelope 3 of the lamp. A multilayer structure 7 is provided over the entire outer surface 3' of the envelope 3. The multilayer The structure 7 is made of a non-light-absorbing material. The multilayer structure 7 is an interference coating comprising a sandwich structure with first layers 7' and second layers 7" positioned alternately with each other. The light source 2 emits visible white light 4 which is directed to the housing 3 , in particular to the multilayer structure 7 . A part of the light 4 passes directly through the housing 3 and the multilayer structure 7 without being reflected. Another part of the visible light 4 is reflected on the multilayer structure 7, which is made of non-light-absorbing material, wherein the multilayer stru...

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PUM

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Abstract

The present invention relates to an electric lamp (1) for vehicle headlights with low-beam function comprising a light source (2) emitting visible light (4), a transparent envelope (3) having an exterior surface (3') and an interior surface (3'') enclosing said light source (2), at least one multilayer structure (7) provided on the exterior surface (3') of the envelope (3), wherein a first light (5) substantially with a bluish-white color transmits through the multilayer structure (7) directly and a second light (6) substantially with a yellowish color transmits through the multilayer structure (7) after being reflected at the multilayer structure (7), wherein the multilayer structure (7) composed of none light absorbing materials is provided in such a way, that the color of light of a standard light source A being reflected at the multilayer structure (7) lies within a triangle in the CIE 1931 Yxy color space defined by the x, y coordinates of (0.58; 0.42), (0.58; 0.30) and (0.70; 0.30), wherein the lightness Y is in the range of 2.5<= Y<= 17.5, wherein none of the emitted visible light (4) is absorbed by the multilayer structure (7).

Description

technical field [0001] The invention relates to an electric lamp for a motor vehicle headlight with low beam function. Background technique [0002] Motor vehicle headlights with low-beam function are within the scope of the present invention all those headlights which produce a light-dark cut-off, such as pure low-beam headlights, combined high-beam and low-beam Headlights, Pure Fog Headlights, Combined Low Beam and Fog Headlights, and Curve Illumination Headlights. [0003] As a rule, headlights with low-beam function are equipped with lamps capable of radiating visible light of substantially the same color in all spatial directions, so that in this case a traffic space illuminated with a uniform color is usually obtained. [0004] A corresponding desired and / or required light color can be achieved by means of conventional coatings, in particular coatings provided on electric lamps in a known manner. [0005] It is known that in traffic spaces bluish light is better refl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J61/40H01K1/32
CPCH01J61/40H01K1/325H01J61/30B60Q1/04
Inventor L·库帕H·-A·多门M·鲁斯克
Owner LUMILEDS HLDG BV