Reflecting type LED automotive headlamp

Abstract

The invention discloses a reflecting type LED automotive headlamp which comprises an aluminum substrate, an LED chip installed on the aluminum substrate, and a focusing lens, wherein the LED chip is jointly surrounded by the focusing lens and the aluminum substrate. The reflecting type LED automotive headlamp further comprises a free-form surface reflector arranged on a light source path. Light beams emitted by the LED chip and focused by the focusing lens are completely reflected by the free-form surface reflector. The surface, close to the LED chip, of one side of the focusing lens is a spherical surface, the surface, away from the chip, of one side of the focusing lens is a free-form surface, after lambert light beams emitted by the LED chip pass through the focusing lens, outgoing beam-divergence angles are smaller, and light intensity areas in all directions are the same. The number of spare and accessory parts of the reflector of the headlamp is small, the headlamp is simple and stable in structure and convenient to install, light distribution requirements can be met without light barriers, optical energy loss of a system is reduced, the utilization rate of the optical energy is improved, meanwhile the reflector occupies small space, and a higher degree of freedom is provided for overall layout of an automobile.

Description

technical field [0001] The invention belongs to the application field of lighting engineering, and in particular relates to a reflective LED automobile headlamp. Background technique [0002] In recent years, with the continuous innovation of LED chip and packaging technology, LED chip is not limited to low-power products, it is developing towards high-power. Due to the advantages of LED itself, LED lighting has penetrated into various fields of national production, such as street lamps, indoor lamps, landscape lamps, etc. The mature application in these fields has pushed LEDs to the ranks of automotive lamps. [0003] The broad prospect of the market will inevitably bring about the diversification of demand: in practical applications, a single LED cannot meet our needs, so we have to tailor our own light distribution system for LED light sources according to the application to meet the needs of automobiles. LED headlamp "GB25991-2010" requirements. [0004] At present, mo...

AI Technical Summary

Problems solved by technology

[0003] The broad prospect of the market will inevitably bring about the diversification of demand: in practical applications, a single LED cannot meet our needs, so we have to tailor our own light distribution system for LED light sources according to the application to meet the needs of automobiles. LED headlamp "GB25991-2010" requirements

[0004] At present, most of the design methods of low beam headlights tend to be a combination of an ellipsoidal reflector and a lens. The ellipsoid has two focal points. The lamp uses a part of the structure of the ellipsoid as the reflector, and the visor is located at the first focal point of the ellipsoid. 1. The lens is located at the second focal point, which is a relatively primitive method. Many traditional light sources use this structure, and some LED lights also use this structure. This structure is not only complicated and takes up a lot of space, but also because the low beam and High beams also have their own light source cavity, which takes up more space and brings inconvenience to the shape of the car

Images