Signify Holding B.v.

Philips Lighting Holding B.v.

Dalibor Cvoric

Patrick Alouisius Martina De Bruycker

Haimin Tao

Georg Sauerländer

Kumar Arulandu

Ronald Hans Van Der Voort

Yi Wang

Robertus Leonardus Tousain

Philip Louis Zulma Vael

Sait Izmit

Yun Yu Wang

Jing Yang

Marcel Beij

Bertrand Johan Edward Hontele

Dmytro Viktorovych Malyna

Dennis Johannes Antonius Claessens

Frits Tobi De Jongh

Han Lu

Ye Liu

Franciscus Jacobus Vossen

Guy Louis Paul De Bondt

Mo Shen

Dennis Claessens

Deyong Kong

Hermanus Johannes Maria Vos

Jurgen Margriet Antonius Willaert

Xiujuan Wu

Xiajuan Wu

Jing Li

Yun Wang

Georg SAUERLÄNDER

Qing Shan

Junwei Tian

A Light Emitting Diode, LED, based lighting device arranged for connection to an Alternating Current, AC, mains supply, comprising a zero-crossing detection module arranged for detecting a zero-crossing in an AC voltage supplied by said AC mains supply, a detection pulse module arranged for providing a detection pulse based on said detected zero-crossing, a human body detection module arranged for determining a current drawn from said AC mains supply during said provided detection pulse, and for determining presence of a human body based on said determined current, wherein said detection pulse module is arranged for providing said detection pulse during a rising, positive, edge of said AC voltage.

Light emitting diode, LED, based lighting device having circuitry for detecting presence of a human body touching the live voltage

A lamp has a safety circuit connected to first and second electrical connection terminals. A test is used to detect if the first and second electrical connection terminals are both connected to external power without an interfering impedance such a human body, and only then enable operation of the lamp. A time for the test is different from a time when another lamp in the system applies a test.

Lamp having a safety circuit, and a safety circuit for use in such lamps

A retrofit LED tube for connection to an electronic ballast, said retrofit LED tube comprising an LED array for emitting light, an alternating current, AC, LED driver arranged for receiving an AC supply voltage and for driving said LED array based on said received AC supply voltage, a filament circuit for supporting a filament current circulating back to said electronic ballast for enabling lamp recognition by said electronic ballast during a lamp recognition phase, and a lamp current to said AC LED driver for driving said LED array during a steady-state phase, and comprising a filament enhancement circuit arranged to reduce at least one of said filament current and said lamp current flowing through said filament circuit, during said steady-state phase.

Retrofit LED tube for connecting to an electronic ballast, and a corresponding lighting system and method

The invention describes an LED lighting module () comprising input terminals () for connecting to an input voltage (U); an LED load () realized to operate at an upper threshold voltage level (V); and a regulation circuit () realized to decrease LED current (I) through the LED load () when the input voltage (U) is greater than the upper threshold voltage level (V). The invention further describes an LED lighting arrangement () and a method of driving an LED load ().

LED lighting module

Control circuits () bring power converters () in different modes in response to detection results. The power converters () exchange possibly rectified first voltage/current signals with electronic halogen transformers () and supply second voltage/current signals to light emitting diode circuits (). The first current signals have, in different modes, different amplitudes. The different amplitudes have different constant values and/or different derivative values. As a result, the first current signal has become a relatively varying first current signal. Then, the halogen transformers () no longer experience problems that occur when smaller amounts of power need to be provided than designed to. The detections may comprise polarity detections of and/or zero-crossing detections in the first voltage signals. The halogen transformers () comprise self-oscillating switched mode power supplies designed to provide first amounts of power at their outputs. The light emitting diode circuits) are designed to consume second amounts of power smaller than the first amounts.

Power converter between halogen transformer and LED

The invention relates to a power converter stage () for providing power supply to a power converter controller (), a power converter controller () for such power converter stage (), a power converter () including such power converter stage () and such power converter controller (), a method for providing power to a controller () of a power converter () and a software product for controlling a power converter (). In order to provide for auxiliary power supply for control circuitry of a power converter () during all operation modes of the power converter () while avoiding additional costs involved with providing a dedicated control power supply fed from bus voltage, it is proposed that power stored in power storing means () included in a power converter stage () or more generally in a power converter () are used for supply to the controller () even if the power converter is in stand-by mode, as a transfer of power between such power storing means () through a primary inductance () may be used for providing also for a power transfer to a secondary inductance (), which then supplies the controller ().

Power converter stage, controller, and method for providing power to controller

The invention describes a low-power load arrangement () comprising a low-power load (); a driver () for the low-power load (); connectors () for connecting to an electronic transformer () realized for converting a mains power supply () to a power supply for a normal-power load (); and a reverse current generating means (L, SB) realized to provide a reverse current (I, I) to sustain self-oscillation during operation of the electronic transformer (), wherein the direction of current flow of the reverse current (I, I) is opposite in direction to the output current of the electronic transformer (). The invention further describes a lighting arrangement () comprising an electronic transformer () realized for converting a mains power supply () to a power supply for a normal-power load; a low-power load () connected to the electronic transformer (), which low-power load () comprises a low-power light source (); and wherein the lighting arrangement () comprises a reverse current generating means (L, SB) realized to provide a reverse current (I, I) to sustain transformer self-oscillation when the transformer () drives the low-power load (), wherein the direction of current flow of the reverse current (I, I) is opposite in direction to the output current of the electronic transformer (). The invention also describes a method of driving a low-power load () with an electronic transformer () realized for driving a normal-power load ().

Lighting arrangement

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Utrecht, Netherlands

Dalibor Cvoric