Abstract: An LED-based lighting unit (100, 200, 300, 400, 1000, 1100, 1200, 1300, 1400, 1500) may be installable into a luminaire (108, 208, 308, 408, 1008, 1108, 1208, 1308, 1408, 1508) to cause the luminaire to be responsive to applied forces and/or movements to control one or more properties of light emitted by the lighting unit. The lighting unit may include one or more LEDs (102), an accelerometer (114), and a controller (112). The controller may: receive, from the accelerometer, a signal representative of a measured mechanical force applied to or movement of the luminaire in which the LED-based lighting unit is installed; determine, based on the signal from the accelerometer, that the measured mechanical force or movement corresponds to one or more predetermined forces or movements; and energize the one or more LEDs to emit light having one or more properties selected based on the determination.

Abstract: A light emitting diode device has a bulk gallium and nitrogen containing substrate with an active region. The device has a lateral dimension and a thick vertical dimension such that the geometric aspect ratio forms a volumetric diode that delivers a nearly uniform current density across the range of the lateral dimension.

Abstract: A control device for power delivered to electrical loads in a load control system via respective load control devices may comprise a programming user interface for programming the operation of the load control system. The control device may be configured to select one or more load control devices in response to successive actuations of a programming button of the programming interface. The control device may be configured to controllably illuminate visual indicators of the programming interface to indicate which of the load control devices is selected in response to successive actuations of the programming button. The control device may transmit programming information to the load control devices. The programming information may determine which of the load control devices are responsive to a digital message transmitted on the digital communication link.

Abstract: Apparatuses for driving loads via converters comprise first circuits for interfacing phase-cut dimmers and the converters. Firing angles of the phase-cut dimmers correspond with first moments in time during periods of voltage signals presented to the phase-cut dimmers. The converters draw first current signals from second until third moments in time during the periods. Second circuits control the converters to draw second current signals from fourth until fifth moments in time during the periods, to improve an energy efficiency.

Abstract: A configurable LED lighting system and its method of operation are disclosed. A lighting system or apparatus includes a string of LEDs, wherein specific LEDs are operable to emit different colors of light. The string includes a plurality of series-connected color segments. A shunt segment includes additional LEDs. The LED shunt segment is connected in parallel with at least one of the color segments. A controller is connected to the LED shunt segment to selectively balance drive current between the LED shunt segment and the color segment to which it is connected in parallel so that a color temperature of light is controllable by a processor. The diverted power still produces light and power is not wasted. The controller can use a polynomial equation or a look-up table to calculate color output values.

Abstract: A safety protection arrangement is provided for a lighting arrangement. An electrical parameter is measured with the driving of the lighting arrangement with particular driving settings and it is compared with an estimated expected value of the electrical parameter so that a safety warning signal or a shutdown can be provided in the event of a detected system failure.

Abstract: A dimmable lighting system may replace a bi-level lighting system without having to modify or supplement the existing wiring between a bi-level control unit and one or more light fixtures. The dimmable lighting system may include a dimming controller that may be configured to replace a bi-level control unit in situ (i.e., e.g., in a wall-mounted dual-gang switch box). The dimmable lighting system may also include a dimming driver that may be coupled to the dimming controller via the existing wiring of the bi-level lighting system. The dimming controller may output to the dimming driver a 0-10 volt DC dimming signal referenced to an AC utility voltage. In response, a dimmable lighting device coupled to the dimming driver may output light over a wide range of dimming light levels. Methods of replacing a bi-level lighting system with a dimmable lighting system are also provided, as are other aspects.

Abstract: A lifestyle lighting control device using a microcontroller technology for managing illumination in an user friendly manner is disclosed, wherein a 24 hour daily cycle is divided by three preset operating time points into three operating time domains with each of the three operating time domains respectively performing a characteristic illumination mode; wherein a late evening sleeping time illumination mode is an user friendly illumination mode; wherein the light is turned on slowly from darkness or a low level illumination (a soft on process) till reaching a high level illumination and then turned off slowly (a soft off process), wherein the soft on process is designed for avoiding or mitigating a hardship of eye irritating effect caused by a sudden switch on of a bright illumination, wherein the soft off process is designed for providing a time delay to the user with a safety illumination arrangement.

Abstract: A plasma generating device that improves plasma generating efficiency can further accommodate changes in plasma generating state because of changes in conditions of surroundings and the like. The plasma generating device is provided with an electromagnetic wave radiating device, which has an electromagnetic wave generating device that oscillates electromagnetic waves and a radiating antenna that radiates electromagnetic waves oscillated by the electromagnetic wave generating device, and a control device that controls the electromagnetic wave radiating device.

Abstract: A system to compensate for luminance degradation of an emissive display is provided. The system employs a combination of a consumption rate limit and temperature to regulate and control display luminance for emissive displays (such as organic light emitting diodes). A consumption rate limit is employed to determine a display luminance ceiling at which to drive the display. By employing the aspects disclosed herein, the display systems may achieve a longer lifetime.

Abstract: A lighting device includes a light source, a driving module, a sensing module, and a control module. The driving module is configured to drive the light source. The sensing module is configured to obtain a brightness value corresponding to the environmental scene. The control module is configured to control the driving module to use a first current to drive the light source, control the sensing module to obtain a first brightness value, control, when the first brightness value is less than a reference brightness value, the driving module to use a second current to drive the light source, control the sensing module to obtain a second brightness value, the second current being greater than the first current by a predetermined amplitude value, compare the second brightness value with the first brightness value, determine that the light source is in a thermal attenuation state or an optical attenuation state.

Abstract: A light source control device includes a constant-current circuit that collectively supplies a current to a plurality of LEDs, a current detection circuit that divides the plurality of LEDs into groups and detects a current amount of a current supplied to each of the groups, and a microcomputer that detects an open fault in the LEDs on the basis of a ratio of the current amount in each of the groups and controls a current supplied from the constant-current circuit to be reduced in a case where an open fault is detected in the LEDs.

Abstract: The current invention relates to a LED driver (10) for driving at least two LED strings (131, 133) comprising: a dual output power converter (103) for converting an input voltage (Vin) into two different output voltages for driving two sets of said at least two LED strings (131, 133), a controller (107) for controlling the dual output power converter (103) based on at least one input set point, the dual output converter (103) comprising a switched capacitor converter comprising a plurality of switches, a plurality of capacitors, the outputs of the dual output power converter (103) being connected to internal nodes of the dual power converter (103), the controller (107) being further adapted to deliver PWM output control signals for driving the switches, the duty cycle of which being a function of said at least one input set point. The invention also relates to a lighting system (1) comprising such a driver (10).

Abstract: A secure device for powering a plurality of inductive loads, each coupled to a dedicated converter, the device including a standby converter and, for each inductive load: a flyback diode connected to the inductive load; a circuit for detecting an anomaly of the current flowing through the inductive load; and a selection switch controlled by the detection circuit, adapted to decouple the inductive load from the specific converter and couple the inductive load to said standby converter.

Abstract: An LED scanning array driver chip and a regulation method capable of self-regulating brightness linear change are provided. The LED scanning array driver chip is provided with LED current non-linear automatic control circuits to automatically regulate the average current of LEDs for the brightness of the LEDs to become bright or dark linearly, enabling each LED of the LED array to control the current non-linear change individually. This greatly reduces the time resource for a MCU to write registers inside the driver chip.

Abstract: The present disclosure is generally directed to an interior lighting system for an aircraft, in which individual lighting elements (or groups of lighting elements) can be controlled to emit light of various colors and brightness according to the position of a cart, such as a galley cart. According to an embodiment, a processor that controls the system receives signals from one or more sensors around the aircraft cabin (e.g., radio frequency identification (“RFID”) readers or optical scanners) that indicate the current position of the cart (e.g., by detecting an RFID tag on the cart) and, based on the position of the cart, sends commands to the various lighting elements around the cabin to execute a lighting scene (e.g., gradually raise the lights as the cart comes through).

Abstract: Disclosed are a control circuit and a voltage generation method of an LED lighting apparatus which provides lighting using a rectified voltage. Light emission of the LED lighting apparatus can be implemented through current regulation, a rectified voltage used for light emission can be used to provide a constant voltage required for a peripheral circuit, and a current flowing through a current path formed by the current regulation can be controlled to perform dimming.

Abstract: A lighting device includes a light source that emits an illumination light. The light source includes a first group of light emitting diodes (LEDs) that emits a first light and a second group of LEDs that emits a second light. The first light has a first Correlated Color Temperature (CCT), and the second light causes the illumination light to have a warmer CCT. The lighting device further includes a differential amplifier to adjust a current flow through the second group of LEDs. The second light is switched on when a current provided to the light source is below a threshold corresponding to the adjustable reference voltage. The lighting device also includes a current sensor to provide a sensor output signal to a second input of the differential amplifier, the sensor output signal having a second voltage corresponding to the current provided to the light source.

Abstract: An analog AC circuit for light emitting diode (LED) groups that provides continuously emitted light through a dimming process from 100% relative light output to 5% of relative light output. The analog AC circuit utilizes ancillary circuitry that bypasses a first series interconnection of a first LED group and presents a capacitor electrically connected to an ancillary transistor to provide constant current at above a current threshold to cause the first LED group to continuously emit light even through a dimming process.

Abstract: A short detection circuit is provided for detecting a short circuit condition of an LED. A voltage threshold is set which is dependent on the LED operating current, such that there are at least two different voltage thresholds at two different LED operating currents. This means false detections can be reduced and the LED current operating range can be increased over which the short detection functions.