Signify Holding B.v.

Yuanqiang Liu

Marcus Cornelis Van Meel

Raimundo De Heer Galisteo

Gang Wang

Jie Fu

Paul R Veldman

Dmytro Viktorovych Malyna

Zhiquan Chen

Shiguang Sun

Wei Zhang

Jing Yang

Xin Liu

Tijmen Cornelis Van Bodegraven

Xiaoqing Duan

Simon Jacobus Maria Kuppens

Rui Zou

Deyong Kong

Mo Shen

Feng Ju

Han Lu

Luna X Zhang

Liwei Sun

Chengrui Yan

Qingxue Wang

Meiping Mao

Ru Yu Li

Yuan Xin Chen

Fan Zheng

A lighting device connects to an external power supply and includes a light emitting load and a secondary load. A temperature measurement is obtained related to a temperature of the external power supply. The secondary load is activated, thereby allowing the secondary load to be powered by the external power supply, when the temperature measurement is below a threshold. Thus, in cold conditions, an increased load is presented to the external power supply to assist start up of the external power supply in cold conditions.

Lighting device which receives power from an external power supply

A tubular LED lamp to be used with an external electronic power controlling device which is adapted to provide an input voltage to the lamp, comprising: a LED unit; a driving circuit for the LED unit; and a safety detection circuit adapted to detect whether the tubular LED lamp is correctly connected to an external lamp fixture; characterized in that further comprising: a holding current providing circuit adapted to provide a holding current through the electronic controlling device so as to maintain the electronic controlling device to be conductive; and a controlling circuit adapted to synchronize the safety detection circuit with the holding current providing circuit such that the safety detection circuit is adapted to carry out the detection when the hold current providing circuit is adapted to provide the holding current and the electronic controlling device is conductive; wherein the controlling circuit is adapted to deactivate the holding current providing circuit and the safety detection circuit after the detection in one cycle of the input voltage, and re-activate and deactivate them in a later cycle.

Tubular LED lamp and a circuit used for the lamp

A driver arrangement for a lighting unit. The drive arrangement comprises an independent first driver mainly for driving a first output capacitor and an independent second driver configured to mainly driving the second output capacitor. The driver arrangement is configured to allow an independent first driver to charge the second output capacitor when one or more predetermined criteria are met.

Mechanism for controlling a driver arrangement

An LED driver that is operable with two different types of power source originally designed for a high-intensity discharge lamp. The LED driver directs current of an input power provided by the power source down a first current path if it is determined that the power source comprises a functional ignitor. The LED driver directs current of an input power provided by the power source down a second current path if it is determined that thepower source does not comprise a functional ignitor.

LED driver for LED lighting units for replacing a high-intensity discharge lamp

A device for determining a type of a power source for powering a LED lighting unit, wherein one possible type comprises a ballast originally designed for a high intensity discharge lamp and repurposed for use with an LED lighting unit. The power source type determiner monitors at least one electrical parameter of either a load or the power source itself after a power drawn by the load whose characteristic is set to a critical value. A value of the electrical parameter is used to identify a type of the power source. A value of the electrical parameter is the pulse generated by the traditional ballast for gas discharge lamp, which pulse is detected to determine the type of the power source.

Power source type determiner

The invention provides a lighting unit having an internal controller. The external power connector of the lighting unit (i.e. the electrical connector plug for connecting the lighting unit to an electrical lighting socket) comprises a manual adjustment element for selecting a setting of the controller. Thus, the manual adjustment element, which functions as a manual user interface, is integrated into the electrical plug part of the lighting unit.

Lighting unit such as a bulb

A retrofit Light Emitting Diode, LED, lighting device for connection to a ballast, wherein said ballast is arranged to be connected to a mains voltage and arranged to provide for a ballast current, wherein said LED lighting device is arranged to detect a dip in said mains voltage using a zero current detector.

Retrofit light emitting diode, LED, lighting device for connection to a ballast, wherein said LED lighting device is arranged to detect a dip in said mains voltage using a zero current detector

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Shanghai, China

Yuanqiang Liu