Signify Holding B.v.

Koninklijke Philips Corporation N.v.

Philips Lighting Holding B.v.

Aart Jan Vroegop

Joris Hubertus Antonius Hagelaar

Simon Eme Kadijk

Berend Jan Willem Ter Weeme

Liang Shi

Theo Gerrit Zijlman

Lambertus Adrianus Marinus De Jong

Aldo Tralli

Marcel Van Der Ham

Melike Yavuz

Jian Jiang

Tralli Aldo

The present invention provides a light emitting diode(s), LED, light strip arranged for providing improved color consistency over its length. The LED light strip comprises LED strings positioned along the length of the LED light strip and powered in parallel, for emitting, for example, red, green, blue and white light. The resistance of the supply and return traces, in combination with variations in the current drawn by or the forward voltage of the various LED and resistors used in the LED strings of different color, causes a voltage drop along these traces leading to inconsistent color rendering. By adjusting the resistivity of the traces, such as through providing return paths having different resistances for LED strings of different color, the consistency of the color rendering can be improved.

LED light strip and method for manufacturing the same

Determination devices () determine properties of load devices () that may remain unchanged for said determining and that comprise first channels with first elements (). The determination devices comprise first switches () for providing first invitation signals to the first channels, detectors () for detecting first response signals that result from the first invitation signals, and controllers () for deriving the properties of the load devices () from detections of the first response signals. The properties define first maximum values of first loads of the first channels, and the controllers () calculate first maximum duty cycles of first supply signals for supplying the first channels in view of the first maximum values of the first loads and power capacities of power supplies () that produce the first supply signals. The load devices () may further comprise second channels with second elements (), and the determination devices () may further comprise second switches ().

Determining property of unchanged load device

The invention describes an LED lighting system () comprising a wireless communication arrangement () for wireless transfer of signals (D, D, D, D) between devices () of the LED lighting system (); at least one LED lamp () connectable to a mains power supply (), which LED lamp () comprises a driver arrangement () with a control unit () for controlling the LED lamp () according to a received signal (D); a phase-cut detector (A,B,C) realized to detect a phase-cut input (V) to the LED lamp (); and a protection circuit () realized to prevent operation of the LED lamp () with the phase-cut input (V) if the phase-cut angle of the phase-cut input (V) exceeds a critical threshold, wherein said protection circuit () is adapted to prevent an exposure of the LED lamp to the phase-cut input. The invention further describes an LED lamp () comprising a driver arrangement (); and a method of controlling an LED lighting system ().

LED lighting system

A fuse and resistor device for a solid state lighting device, wherein at least a part of the fuse and resistor device embodies a connection pin arranged to be received at a power supply socket. The connection pin comprises an elongated conducting structure, which is partly enclosed by an insulating support structure. The conducting structure comprises a dampening resistor, and the fuse and resistor device further comprises a fuse connected with the dampening resistor either a separate part or as an integral part of the conducting structure.

Fuse and resistor device for a solid state lighting device

Growing community of inventors

Zaltbommel, Netherlands

Aart Jan Vroegop