LED automobile dipped headlight of multiple reflection structure

Abstract

The invention discloses an LED automobile dipped headlight of a multiple reflection structure. The LED automobile dipped headlight comprises a light source, an ellipsoidal reflection mirror, a first parabolic reflection mirror and a second parabolic reflection mirror, wherein the normal direction of the light-emitting surface of the light source faces a projection area; the ellipsoidal reflection mirror is obliquely located above the light source; the first parabolic reflection mirror is located below the light source; and the second parabolic reflection mirror is located below the first parabolic reflection mirror. The ellipsoidal reflection mirror comprises an ellipsoidal first focus and an ellipsoidal second focus. The focus of the first parabolic reflection mirror is overlapped with the first focus of the ellipsoidal reflection mirror. The focus of the second parabolic reflection mirror is overlapped with the second focus of the ellipsoidal reflection mirror. A light and shade cut-off structure which can enable a projected light ray to form a light spot with a light and shade cut-off line is formed at the bottom of the ellipsoidal reflection mirror. Through a system composed of the ellipsoidal reflection mirror, the first parabolic reflection mirror and the second parabolic reflection mirror, the projected light spot has the clear light and shade cut-off line; and the ellipsoidal reflection mirror not only serves as a reflection mirror but also serves as a baffle plate, so that the light energy utilization rate is greatly increased.

Description

technical field [0001] The invention relates to the technical field of vehicle lamp lighting, in particular to an LED vehicle low beam lamp with a multiple reflection structure. Background technique [0002] With the development of social economy, automobiles have become an indispensable means of transportation and transportation in human society. In today's world, safety, environmental protection and energy saving have become the three major issues of automobile development. Headlights are the main lamps that illuminate the road ahead when the car is driving at night, and are an important part to ensure the safe operation of the car. With the continuous improvement of driving safety requirements, headlights are required to have long lighting distance, good light distribution performance, and high light efficiency. According to the world's automobile safety accident statistics, the probability of traffic accidents at night is three times that of daytime, and the accident r...

AI Technical Summary

Problems solved by technology

[0003] Traditional halogen light sources have the advantages of low cost and mature technology. However, the problem with halogen light sources is that they consume a lot of power. In terms of energy saving and emission reduction, LED light sources have high luminous efficiency, and their power consumption is only one-third of that of halogen light sources. One or so, LED light source has obvious advantages

However, the biggest disadvantage of the transmissive low beam structure is that the shading plate blocks most of the light so that the light utilization rate of the entire system is low

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