Signify Holding B.v.

Philips Lighting Holding B.v.

Shangwu Chen

Sreeraman Venkitasubrahmanian

Zhipei Wang

Minghua Ye

A device()is connected to an output terminal of a controller(), having a single input terminal connected to a first power terminal of an external power source()which outputs an AC voltage between the first power terminal and a second power terminal. The device includes a bleeding circuit(), and a switching arrangement()to detect whether the controller powers a load(or disables the load. When the controller is in an OFF state, the switching arrangement connects the bleeding circuit between the output terminal of the controller and the second power terminal to provide a current path between the output terminal of the controller and the second power terminal. When the controller is in an ON state, the switching arrangement disconnects the bleeding circuit between the output terminal of the controller and the second power terminal.

Shunt device in lighting control system without neutral wire

A sensor assembly, comprising a housing having a receiving window covered by an optically transparent cover. The housing accommodates electric components, at least comprising a motion sensor and an ambient light sensor. The motion sensor and the ambient light sensor are positioned such that light entering the cover impinges on the motion sensor and the ambient light sensor. Between the cover and the ambient light sensor is an optical diffuser positioned, such that light entering the cover traverses the optical diffuser before impinging on the ambient light sensor. The sensor assembly may be used separately or incorporated in an electric or electronic device.

Sensor assembly and a device comprising such sensor assembly

A device () and method () control a dimming level of one or more lighting units () in response to a user interaction with a reference-free user interface (), such as a rocker-type interface. A bidirectional triode thyristor () supplies an AC input voltage () to the lighting unit(s) when it is triggered. A triggering circuit () triggers the bidirectional triode thyristor. The triggering circuit includes a capacitor () and a variable resistance element () which sets a time constant during each half cycle of a period of the AC input voltage for charging the capacitor to a triggering voltage which triggers the bidirectional triode thyristor. The resistance of the variable resistance element is controlled in response to a dimming input signal from the reference-free user interface. The dimming input signal indicates only relative changes in the output level of the lighting unit(s) with respect to the present level.

Phase-cut dimmer device and method of phase-cut dimming for a lighting unit controlled by a rocker-type user interface

A device () is connected to an output terminal of a controller (), having a single input terminal connected to a first power terminal of an external power source () which outputs an AC voltage between the first power terminal and a second power terminal. The device includes a bleeding circuit (), and a switching arrangement () to detect whether the controller powers a load (or disables the load. When the controller is in an OFF state, the switching arrangement connects the bleeding circuit between the output terminal of the controller and the second power terminal to provide a current path between the output terminal of the controller and the second power terminal. When the controller is in an ON state, the switching arrangement disconnects the bleeding circuit between the output terminal of the controller and the second power terminal.

A dimmer switch (-x,A,B,) adapted to be coupled to an alternating current (AC) source and to a load so as to control an amount of power delivered from the AC source to the load, the dimmer switch may include: a triode for AC (TRIAC) () coupled between the AC source and the load, and which when triggered conducts to deliver a controlled amount of power from the AC source to the load for a corresponding half-cycle of one or more half cycles of the AC source. The dimmer switch may include first and second triggering circuits () configured to trigger the TRIAC when charged after being enabled. One or more of the triggering circuits may be a self-balancing triggering circuit. The dimmer switch may further include a controller () which selects and thereafter enables one or more of the first or second triggering circuits.

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Wheeling, IL, United States of America

Shangwu Chen