Osram Gmbh

SiXiong Zeng

WeiHuang Chen

Haiqiang Zhong

Middel Tjaco

Xuewei Dai

Daxin Lin

Yaping Liu

Al Ma

Hui Jia

Ai Ma

Yewei Liufu

A zoom unit () of a light engine (), comprising at least one lens (), at least one first reflector () and at least one second reflector (), other at least one lens () receives a collimated beam (LI) from a light source unit () of the light engine (), the collimated beam (LI) being incident on the first reflector () after being converged by the lens (), and being incident on the second reflector () after being reflected by the first reflector (), to produce an output beam (L4) with its beam angle changed.

Zoom unit, a light engine having the zoom unit and an illuminating apparatus

A light source unit of a light engine is disclosed, wherein the light source unit includes a plurality of LED sub light source units each comprising at least one LED and an optical device corresponding to the at least one LED, the optical device is configured to modify a beam from each LED to be an approximately collimated beam.

Light source unit, a light engine having the light source unit and an illuminating apparatus

Various embodiments relate to a load driver and a luminaire including the load driver. The load driver may include a voltage limiting circuit including a first polar capacitor and a second polar capacitor connected in inverse series, which are connected in parallel respectively with first and second current limiting elements, where the first and second current limiting elements limit the direction in which current flows so that current flows through different polar capacitors in positive and negative halves of a cycle of an alternating-current power supply.

Load driver and luminaire including the load driver

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Shenzhen, China

SiXiong Zeng