Signify Holding B.v.

Huojun Long

Haimin Tao

Zhi Quan Chen

Xianhui Zhang

Yi Wang

Derek Zheng

Wen Ran

There is proposed an interface circuit for connecting an electronic ballast to a lighting arrangement, in which control of a coupling configuration of the interface circuit is dependent upon a frequency of the electronic ballast. In particular, a coupling configuration of the interface circuit is controlled by a control arrangement based on the ballast frequency.

Electronic ballast interface circuit

The invention provides a solid state (e.g. LED) tubular lighting device having pin safety circuits connected to connecting pins at each end. A driver circuit is connected to the outputs of the pin safety circuits. The pin safety circuits each comprise a TRIAC switch which is adapted to form a closed switch in response to a voltage between the connecting pins. This provides a pin safety solution suitable at least for rapid start EM ballasts.

Tubular device for fitting to a tubular light fitting

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Shanghai, China

Huojun Long