Illumination sources are turned ON and turned OFF in response to detected levels of illumination in an ambient environment reaching respective thresholds, which may be user set. The detection of these turn ON and turn OFF events is verified, for instance against expected events or conditions for the particular location, date and/or time. An alert or log entry may be generated if a detected event or condition appears to be invalid. For instance, if an amount of illumination in the environment is different than predicted by a threshold amount or if a time that the event occurs or is detected is different than expected or predicted by more than a threshold amount. A level of illumination may be decreased to some non-zero level after a specified time after turn ON, and increased at some specified time before turn OFF. Use of information from external sources (e.g., satellites, cell towers) may allow times to be using local time, including daylight savings if applicable.

Apparatus and method of energy efficient illumination using received signals

An illumination system and methods to control a light source are provided. An illumination system includes a light source, a two-dimensional non-Passive Infrared (non-PIR) imager, and a controller. The light source provides at least two levels of illumination. The non-PIR imager images an area and to produce image data representative of images across at least part of a visible portion of an electromagnetic spectrum. The controller is communicatively coupled to receive the image data from the non-PIR imager and process the received image data to detect at least one ambient environmental characteristic of the area in the part of the visible portion of the electromagnetic spectrum, where the ambient environmental characteristic is indicative of a presence or imminent presence of a body in the area. The controller is also coupled to control operation of the light source based on, at least in part, detection of the ambient characteristic of the environment.

Long-range motion detection for illumination control

Apparatus and methods to regulate an input power applied to a plurality of light emitters are provided. A regulator device includes a plurality of switches and a control circuit that controls the plurality of switches. The plurality of switches selectively couple respective strings of the light emitters in series to the input power to emit light when deactivated. The control circuit may deactivate a number of the switches to couple the respective light emitters to the input power in response to a sensed operational parameter of the input power. The control circuit may adjust the number of the switches deactivated in response to a change in the sensed operational parameter of the input power. A number of the light emitters may be coupled to the input power regardless of the sensed operational parameter of the input power.

Electronic control to regulate power for solid-state lighting and methods thereof

An illumination system and methods to control a light source are provided. An illumination system includes a light source, a two-dimensional non-Passive Infrared (non-PIR) imager, and a controller. The light source may provide at least two levels of illumination. The non-PIR imager images an area and to produce image data representative of images across at least part of a visible portion of an electromagnetic spectrum. The controller is communicatively coupled to receive the image data from the non-PIR imager and process the received image data to detect at least one object in the area of a defined type of object. The controller is also coupled to control operation of the light source based on, at least in part, detection of the ambient characteristic of the environment. Alternatively, one or more components of a system may be used to monitor traffic, with or without active illumination.

Systems and methods that employ object recognition

A solid-state lighting device has user-engageable actuator physically manipulable by a user and accessible from an exterior of the device to adjust an amount of light output. The user-engageable actuator may take the form of a knob, slider, lever, or other manipulable surface or structure. The user-engageable actuator may extend partially or fully from a housing, or alternatively be recessed or otherwise within the housing with access provided via an aperture, slot or opening. Access may be directly by the user (e.g., finger) or via a tool (e.g., screw driver, Allen wrench, socket) manipulated by the user. The actuator may form part of an adjustment component (e.g., potentiometer, rheostat) which supplies an adjustable output to a drive circuit or electronics. The adjustment component may be electrically coupled to either a primary or secondary side of a transformer, which forms part of a power converter (e.g., flyback).

Adjustable output solid-state lighting device

The present invention relates to a lighting device (1) suitable for identifying and marking traffic surfaces of airports, comprising at least one semiconductor luminous element (2) and an electronic control circuit that can be connected to an electrical alternating current supply grid for controlling the operation of the at least one semiconductor luminous element (2), wherein the control circuit comprises a rectifier (5) that can be connected to the electrical alternating current supply grid without a transformer, and an internal power supply device (6) connected to the rectifier (5) for supplying a direct electrical current to the at least one semiconductor luminous element (2), wherein the internal power supply device (3) comprises electronic reactive power compensation means, by means of which the voltage and current can be maintained in phase for all operating modes of the lighting device (1).

Lighting device for identifying and marking traffic areas of airports

An airport light for generating and elliptical beam of light and a method for generating such a beam of light is disclosed. The airport light has within a housing a first module with first LEDs, generating a first beam of light and a second module with a second LEDs, generating a second beam of light. The modules are mounted under an angle against each other resulting in non-parallel and partially overlapping beams of light from the LEDs.

Led approach light

A method for driving a LED-airfield light by a controller 18, being at least connected two LED-modules 20, 30, wherein the LED-modules 20, 30 each comprise a memory 28, 38, permits to drive the LEDs at equal luminosity if the method comprises at least the steps of storing status information about each LED- module 20 on the respective LED-module 20, reading the status information by the controller 18 and determining driving parameters for a first LED-module 20 of the at least two LED-modules 20, 30, considering the status information about at least one second LED-module 30.

LED-airfield light

A lamp emulating circuit for AC powered airport lighting systems may be used for emulating the failure mode of a lamp to a lamp control circuit while a PWM- d riven LED lamp is used. The lamp emulating circuit has a rectifier connected to a filter for determining the voltage across the lamp transformer. This is further connected to a relay coil which opens a contact for disconnecting the LED lamp circuit from the lamp transformer, when the voltage across the lamp transformer exceeds a predetermined value. By completely disconnecting the LED lamp circuit from the lamp transformer, a failed lamp is emulated.

The present invention relates to a device and a method for detecting failures of led airfield lighting devices

The invention applies a high intensity airfield lighting system comprising a main body, a dome securable to the main body, wherein the dome is designed for light transmission and at least partially transparent, at least one light unit covered by the dome and comprising at least one first lighting element fixed to a carrier of the light unit, at least one first optical element designed to receive light from the first lighting element and to emit the light received into a main light-exit direction, and a support for the at least one first optical element and a heat sink for dissipating heat generated by the first lighting element, characterized in that at least one second lighting element and at least one second optical element are provided with the second optical element receiving the light of the second lighting element and emitting the light received at least semicircular within a light-exit plane

High intensity airfield lighting system

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