Lamp

US6991357B2 · kind B2 · utility

Assignee

• FER Fahrzeugelektrik GmbH · DE

Inventors

• Frank Wimbert · Owen, DE
• Horst Deichmuller · Eisenach, DE

Key dates

• Filing date: Oct 10, 2003
• Grant date: Jan 31, 2006
• Expiry date: Nov 6, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F21Y2115/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A lamp, in particular a motor vehicle lamp, comprises a light distribution device (14, 14′) into which the light of at least one light source (6) is fed in such a way as to produce a light flux which is firstly propagated through the light distribution device substantially parallel to a light exit surface defined thereby. Components are deflected out of the light flux by means of coupling-out structures (16, 16′) for delivery through the light exit surface. To achieve good illumination of the light-transmitting surface the coupling-out structures are a plurality of coupling-out layers which are arranged at spacings in succession in the direction of propagation of the light flux and which comprise a medium whose optical refractive index is different from that of the medium filling the intermediate spaces between said layers, wherein the coupling-out layers are so inclined relative to the propagation direction of the light flux at a predetermined angle that its main component passes through them without a substantial change in direction while a minor part is reflected towards the light exit surface.