Koninklijke Philips Corporation N.v.

Philips Lighting Holding B.v.

Signify Holding B.v.

Mark Verhoeven

Siebe Tjerk De Zwart

Vincent Stefan David Gielen

Oscar Hendrikus Willemsen

Egbert Lenderink

Stefan Marcus Verbrugh

Cornelis Gerardus Maria De Haas

Marijn Geels

Menno Van Baardwijk

Vincent Gielen

The present invention relates to a LED tube () for retrofitting in a fluorescent tube lighting fixture having a preheat phase during which the fluorescent tube lighting fixture is arranged to preheat filaments of a fluorescent tube, the LED tube () comprising: an array of LEDs (), a LED driver () for driving the array of LEDs (), a first pair of contact pins () at a first end () of the LED tube () and a second pair of contact pins () at a second end () of the LED tube () for connecting the LED tube () electronically and mechanically to the fluorescent tube lighting fixture, the first pair of contact pins () being connected forming a first circuitry, the second pair of contact pins () being connected forming a second circuitry, the LED driver () being connected between the first circuitry and the second circuitry, and a temperature controlled switch () having an open state and a closed state, and being arranged to adapt the closed state when heated, such that a current path between the first circuitry and the second circuitry is obtained, wherein a preheat current passing between the first pair of contact pins () during the preheat phase of the fluorescent tube lighting fixture is arranged to heat the temperature controlled switch.

LED tube for retrofitting in a fluorescent tube lighting fixture

An end cap () for a tubular light source (), the tubular light source () configured to be arranged in a lighting fixture () comprising at least one socket (), wherein the end cap () comprises, a first housing portion (), two connector pins () at least partly arranged on an outside of the first housing portion () and adapted to fit in the socket (), and a switch assembly comprising a switch element, wherein the switch assembly being adapted to form a conductive path between the socket () and the tubular light source () through a depression of the switch element in combination with a relative rotational motion of the first housing portion () in relation to the tubular light source () as the tubular light source () is mounted in the fixture ().

End cap for a tubular light source

A system comprises a light source and an electrode device (). The light source comprises a base () with a base surface () on which at least two contact elements are provided. The electrode device has at least two electrodes (), preferably of ferromagnetic or electromagnetic material and having a different polarity during operation. Adjacent electrodes are arranged at a predetermined electrode distance. Both electrodes are provided in one layer and are arranged in an interdigitated configuration. The light source has at least two, but preferably four contact elements () arranged at a mutual spacing which is essentially compatible with said electrode distance.

Lighting system, electrode device and light source

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Eindhoven, Netherlands

Mark Verhoeven