Signify Holding B.v.

Marcus Cornelis Van Meel

Raimundo De Heer Galisteo

Jie Fu

Dmytro Viktorovych Malyna

Yuanqiang Liu

Shiguang Sun

Gang Wang

Paul R Veldman

Tijmen Cornelis Van Bodegraven

Zhiquan Chen

Luna X Zhang

Peter Johannes Martinus Bukkems

Erik Paul Boonekamp

Zhi Quan Chen

Paul Philip Thursfield

Simon Jacobus Maria Kuppens

Yun Fei Duan

Fan Zheng

Yuangiang Liu

Gu Yuan Chen

Martinus Hermanus Wilhelmus Maria Van Delden

Paul Robert Veldman

A luminaire arrangement (), comprising, a housing () extending in a length direction, L, at least one printed circuit board, PCB (), arranged inside the housing, wherein the at least one PCB extends in the length direction, L, at least one light source () arranged on the at least one PCB, at least one supporting element () arranged on the at least one PCB, and adjacent to the at least one light source, at least one biasing element () extending in the length direction, L, where the at least one biasing element is arranged between the at least one supporting element and the housing and is configured to be biased between the at least one supporting element and the housing in a direction, B, perpendicular to the length direction, L, wherein the at least one supporting element extends beyond the at least one light source in the direction, B, by at least a distance, D, such that the at least one light source and the at least one biasing element are separated by at least the distance, D, and at least one fastening element () extending in the length direction, L, wherein the at least one fastening element is arranged at least partially within the housing and is biased between the at least one biasing element and the housing, and wherein the at least one fastening element is configured to fasten the at least one biasing element between the at least one supporting element and the housing wherein the at least one fastening element comprises at least one optical element which has an elongated cylindrical shape.

Luminaire arrangement and method for assembling such luminaire arrangement

An artificial skylight structured to emit light for imitating a sun-sky appearance, the artificial skylight comprising a sun-appearance imitating lighting fixture comprising a diffuser frame of visible light diffusing material, the diffuser frame forming side walls of a recessed window and a first light emitting source for emitting first light through the diffuser frame, as well as a sky-appearance imitating lighting fixture comprisinglight exit panel being of visible light transmissive material and a further light emitting source for emitting second light through the light exit panel; wherein the light exit panel is mounted on the side walls of the recessed window of the diffuser frame of the sun-appearance imitating lighting fixture, and wherein the artificial skylight further comprises an optical element configured to limit first light emitted by the sun-appearance imitating lightingfixture from exiting via the recessed light exit panel of the sky-appearance imitating lighting fixture.

Artificial skylight

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

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

A retrofit lamp is to be used with a ballast. A shunt switch is provided in parallel with an output load and is adapted to shunt input terminals of the lamp using pulse width control so as to tune the current through the lighting element. This current control is used to enable compatibility with different ballasts and to provide dimming control. A detection circuit is used to detect an abnormal drive condition of the retrofit lamp and the pulse width control of the shunt switch can then be overridden by holding the shunt switch at a stable state for a certain duration. This prevents overload conditions and avoids DC signals in the event of component failures.

Retrofit lamp and a lighting system using the same

Growing community of inventors

Helmond, Netherlands

Marcus Cornelis Van Meel