Ledvance Gmbh

Osram Gmbh

Siteco Gmbh

Dezhao Zhang

Jun Liu

Ming Hsi Wang

Moritz Engl

Middel Tjaco

Xuewei Dai

Zesheng Ye

Haiping Yuan

MingTao Wang

Mortiz Engl

Chunjun Jiang

Various embodiments may relate to a lighting device, which includes a lamp tube having two open ends, a light engine arranged in the lamp tube, a carrier supporting the light engine, and two end caps closing the open ends. The lighting device further includes a diffuser. The carrier supporting the light engine is held on the diffuser, and the diffuser is held on the inner wall of the lamp tube.

Assembly including a diffuser for a lighting device

Lighting device

A constant current source circuit includes a main circuit, wherein the main circuit includes a first three-terminal regulator, a transistor, a sample resistor and a load, an output terminal of the first three-terminal regulator is connected with a control Electrode of the transistor, a reference Electrode of the transistor is connected with a voltage input terminal, a working Electrode is connected with one end of the load, and the other end of the load is connected with one end of the sample resistor, and the other end of the sample resistor and an input terminal of the first three-terminal regulator are connected to a reference potential, respectively, wherein the constant current source circuit further includes an adjusting unit that includes a voltage stabilizing unit, a fourth resistor and a fifth resistor.

Constant current source circuit and a sampling circuit

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Shenzhen, China

Dezhao Zhang