Free-form surface micro lens array for LED (light-emitting diode) headlamp of automobile

Abstract

The invention discloses a free-form surface micro lens array for an LED (light-emitting diode) headlamp of an automobile. Light emitted by an LED light source of the LED headlamp of the automobile is collimated and is then emitted out in a parallel light beam mode; the free-form surface micro lens array is formed by closely distributing a plurality of free-form surface micro lenses in the whole section of the parallel light beam; all the free-form surface micro lenses are integrally formed; the incident face of each free-form surface micro lens is a plane, and the emergent face of each free-form surface micro lens is a free-form surface. According to the free-form surface micro lens array disclosed by the invention, a light barrier is not needed for light distribution, loss of light energy caused by a light distribution system is reduced, and the light energy use ratio is improved. By adopting the free-form surface optical design, the trend of light rays can be effectively controlled, the glare effect is restrained, and meanwhile, the light distribution requirements of the LED headlamp for the automobile in the national standard GB25991-2010 can be met.

Description

technical field [0001] The invention relates to the technical field of LED automobile headlamp lighting, in particular to a free-form surface optical microlens array used for the LED automobile headlamp. Background technique [0002] LED light source is a new type of high-efficiency light source. According to research, LED has superior performance that cannot be replaced by other light sources, and can open up huge application space for automotive headlights. In particular, the LED light source has many advantages such as compactness, sturdiness, longevity, energy saving, flatness, and suitability for mechanical and electrical integration, and meets people's requirements for car headlights in terms of safety, comfort, luxury, energy saving, environmental protection and multi-function. These characteristics make LED light source a hot spot in the current research and development at home and abroad. [0003] Compared with other light sources, the luminous characteristics of L...

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Problems solved by technology

[0003] Compared with other light sources, the luminous characteristics of LEDs are very different, the arrangement of the chip array and the design of the lamp structure will affect the final effect, so that the LED light source will face more complex optical design when it is applied to motorcycle headlights question

At present, the projected LED headlight design is widely used. This optical design can form a good light effect, but it needs to add a light baffle when designing the low beam. The entire optical system is complex and the light energy low utilization

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