Abstract: Provided is an organic EL panel which is passively driven and is capable of preventing variations in wiring resistance of electrode wirings without restricting the degree of freedom for wiring design and improving evenness in brightness of an organic EL element. The organic EL panel is formed of a light-emitting display unit (2) having a plurality of first electrode lines (2a) formed on a support substrate (1), an organic light-emitting layer (2d) formed on the first electrode lines (2a), and a plurality of second electrode lines (2e) formed so as to intersect the first electrode lines (2a). The organic EL panel has a plurality of electrode wirings (4) which is formed by being routed on the support substrate (1) so as to be connected with the second electrode lines (2e) or the first electrode lines (2a), and the electrode wirings (4) each have parts (4a, 4c) each of which is formed of one wiring and/or apart (4b) in which a plurality of wirings are connected in parallel with each other.

Abstract: A power supply includes a load connected in series with a switch. The power supply uses the load in series with the switch to maintain a substantially constant voltage. The voltage may be used as a voltage bias and supplied to a controller module that is used to control switching of the switch. The load is operable to maintain a substantially constant voltage at an input terminal of the load and also to function as a current sink. The load may also perform an additional function, such as provide auxiliary lighting or operate as a cooling mechanism for the power supply and/or a lighting system that includes the power supply.

Abstract: An apparatus includes first and fourth bypasses, a current detector, and a current controller. The first bypass is connected serially to a first LED, and controls the current amount in the first LED. The fourth bypass is connected serially to a second LED, and controls the current amount in the first and second LEDs. The detector detects current detection signal based on the current amount on an output line along which the first and second LEDs are connected serially to each other. The controller provides control signal for controlling the first and fourth bypasses based on the detection signal. The controller includes one output for providing the control signal. The first and fourth bypasses are connected in parallel to the one output.

Abstract: An electrical connector is provided for connecting a light emitting diode (LED) to a driver. The electrical connector includes a housing, a driver input contact held by the housing and configured to be electrically connected to a power output of the driver, and an LED output contact held by the housing and configured to be electrically connected to a power input of the LED. An electrical path is defined between the driver input contact and the LED output contact for supplying electrical power from the driver to the power input of the LED. The electrical connector includes a temperature monitor and control (TMC) module operatively connected to a temperature sensor for receiving a temperature associated with the LED. The TMC module is configured to control the flow of electrical power from the driver input contact to the LED output contact based on the temperature received from the temperature sensor.

Abstract: A light emitting diode (LED) backlight driving circuit includes LED lightbar(s) and a control module; the control module includes a dimming controllable switch. The LED lightbars are connected with the dimming controllable switch in series. Two ends of the dimming controllable switch are connected with a varistor in parallel. Because two ends of the dimming controllable switch are connected with a varistor in parallel, when the dimming controllable switch is switched off, a current of the branch circuit is suddenly reduced, the voltage withstood by the LED lightbars is greatly reduced, and the voltage on two ends of the dimming controllable switch is increased. Then, under action of high voltage, resistance of the varistors connected in parallel is reduced, and the current of a new branch circuit formed by the LED lightbars and the varistor is also increased. Thus, the voltage withstood by the LED lightbars is increased again and the voltage on two ends of the dimming controllable switch is reduced.

Abstract: Methods and apparatuses for controlling a parameter of a device through motion sensing are disclosed. One apparatus includes a motion sensor for sensing a first instance of motion. The apparatus further includes a controller interfaced to the motion sensor and the device, wherein the controller is operative to activate the light only if consecutive instances of motion are sensed, wherein each instance is sensed within a gap of time of a previously sensed instance of motion, and the consecutive instances of motion being sensed span an entire window of time after sensing the first instance of motion.

Abstract: An organic electroluminescent display device includes an organic electroluminescent display panel including top emission pixels to emit light toward a top side of a substrate and bottom emission pixels to emit light toward a bottom side of the substrate, the top emission pixels and the bottom emission pixels being formed such that corresponding ones thereof share a common transparent area, a scan driver for supplying a scan signal to scan lines each connected to selected ones of the top and bottom emission pixels, and a data driver for supplying a data voltage to data lines each connected to selected ones of the top and bottom emission pixels. The top emission pixels and the bottom emission pixels are formed on the substrate to alternate with each other on a pixel basis, on a scan line basis, or a data line basis.

Abstract: A lighting system automatically assigns a unique address to each lighting apparatus, and controls each lighting apparatus based on the assigned address. The lighting system may include a first lighting apparatus, a second lighting apparatus connected to the first lighting apparatus in series, and a bridge device coupled to the first and second lighting apparatuses in series and configured to assign an address to the first and second lighting apparatuses. The bridge device may transmit a first data packet to initialize the lighting apparatuses for address assignment, and a control circuit may disconnect the connections between the lighting apparatuses during address assignment.

Abstract: An LED lighting device includes a first luminescent device for providing light according to a first current, a second luminescent device coupled in series to the first luminescent device for providing light according to a second current, an impedance device for limiting the second current within a predetermined range when a voltage established across the first luminescent device and the second luminescent device exceeds a first predetermined value, and a two-terminal current controller coupled in parallel with the first luminescent device and in series to the second luminescent device and configured to regulate the second current according to a voltage established across the two-terminal current controller.

Abstract: This disclosure describes systems and techniques for managing streetlights. The subject matter included in this document is embodied in a method that includes receiving, at a computing device, information representative of a location and status of a streetlight included in a network of streetlights. The method also includes presenting a representation of the streetlight in a graphical user-interface in accordance with the received location and status information, and receiving information representing a selection of the streetlight for inclusion in a group of streetlights from the network. The method further includes initiating delivery of one or more control signals to the group of streetlights.

Abstract: A driver circuit includes a buck converter associated with each LED chain for supplying a load current thereto. The buck converter receives an input voltage and is configured to provide a supply voltage to the associated LED chain such that the resulting load current of the LED chain matches at least approximately a predefined reference current value. The driver circuit further includes a switching converter that receives a driver supply voltage from a power supply and provides, as an output voltage, the input voltage for the buck converters. The switching converter is configured to provide an input voltage to the buck converters such that the maximum of the ratios between the input voltage and the supply voltages provided to the LED chains matches a predefined tolerance reference ratio.

Abstract: A constant current control circuit with multiple outputs for a LED driver, the circuit including a single-output constant current power supply, and multiple output circuits, each output circuit comprising a current sharing circuit, a current sharing control circuit and a LED load. The LED load and the current sharing circuit are in series and form a series loop with a first terminal and a second terminal of the series loop connected to a first output terminal and a second output terminal of the constant current power supply.

Abstract: The present invention relates to power reforming methods and associated multiphase lights, especially to power reforming methods and associated multiple lights that selectively turn ON and OFF to reform current to follow voltage appropriately, which provides better heat dissipation, improving power factor and color mixing capability. The method comprises acts of rectifying an AC voltage to a pulsating DC voltage, synchronizing an internal time base signal to the pulsating DC voltage, setting pulse duration in a pulse period and turning ON and OFF of an electronic device. The device comprises at least two loads, a rectifier, at least two drivers and a controller.

Abstract: A synchronous light adjustment method and the device for performing the same are proposed. Each of plurality of lamps is installed with a light sensor and a control unit. By actuating a single power switch, the control unit will control the illumination of a respective one of the LED lamps independently and automatically based on the environmental illumination detected by a light sensor. Further, by switching the power switch manually to match predetermined operations, the control units will adjust the illuminations and color temperatures of the LED lamps synchronously and gradually. The device is convenient in installation and usage.

Abstract: The present invention discloses a lighting apparatus that includes a plurality of parallel circuits and a common circuit. The parallel circuits each comprise a switching transistor and a set of LEDs, the sets of LEDs having different characteristics such as different light output wavelengths. In operation, one of the parallel circuits is selected by activating the corresponding switching transistor, thus selecting the respective LEDs to be activated. The common circuit also comprises a set of LEDs, these LEDs being activated no matter which parallel circuit is selected. In various implementations, the lighting apparatus can generate a wide spectrum of light outputs by selectively activating the plurality of parallel circuits within time slots of a duty cycle. In some cases, balancing of loads across the parallel circuits is desired to maintain the appropriate current flowing through the LEDs.

Abstract: A modular LED power supply is provided. The modular LED power supply includes a docking module having a plurality of grooves for receiving a plurality of power supply driver modules. The plurality of power supply driver modules are modular in nature and are attached to the plurality of grooves in the docking module based on the power requirements, Also, the modular LED power supply includes a supervisory module for analyzing and controlling the number of power supply driver modules required to be attached to the docking module.

Abstract: According to one embodiment, a structural electrical system includes an electrical power source operable to provide electrical current, a structural composite, and a plurality of output devices. The structural composite includes alternating layers of conductive layers and insulative layers. Each conductive layer is less than or equal to 500 nanometers thick and each conductive layer is in electrical communication with the electrical power source. The plurality of output devices are in electrical communication with each conductive layer and are operable to receive electrical current from the electrical power source through the conductive layers.

Abstract: A method for setting and adjusting light emitted from an adjustable lighting device is disclosed. The adjustable lighting device includes a timing unit and a non-volatile memory (NVM) module for storing a record data which includes a memory flag changeable between a set state and a reset state, and a plurality of light setting values. In the method, the adjustable lighting device is configured to allow a user to select an illumination state of the light, and to change the memory flag in the record data to the set state and to store the record data with a corresponding one of the light setting values when a elapsed time counted by the timing unit is longer than a predetermined threshold time period.

Abstract: A light-emitting system includes first and second solid-state light-emitting components, a current source providing a constant current through the second solid-state light-emitting component, a first instrumentation amplifier detecting a second forward voltage across the second solid-state light-emitting component so as to generate a first detection voltage having a magnitude dependent on the second forward voltage, a compensation voltage module operable to generate a compensation voltage having a magnitude related to the second forward voltage according to the first detection voltage and two reference voltages, and a power control module detecting a first forward voltage across the first solid-state light-emitting component and providing a driving current therethrough that is dependent on the compensation voltage and the first forward voltage and that varies according to ambient temperature.

Abstract: LEDs that provide street illumination are used to create emergency signals. This facilitates simple retrofitting of existing streetlighting infrastructure. In one embodiment, a streetlight comprises an LED set that itself comprises or consists of a plurality of LEDs collectively producing a white light output. The streetlight also includes a receiver for receiving a signal of an alarm condition, and a controller for (i) disabling the LED set during a daylight period, (ii) maintaining the normal operating mode during a lighting period distinct from the daylight period, and (iii) in response to the alarm condition detected by the receiver, de-activating at least one of the LEDs to produce a non-white (e.g., red or amber) output signaling the alarm condition.

Abstract: It is disclosed a method for operating a lighting system, which lighting system comprises a plurality of lighting modules, each of which comprises at least one communication unit, via which the respective lighting module is adapted to communicate with at least one neighboring lighting module. A control device may be adapted to communicate control signals to at least one of the lighting modules and each of the lighting modules may be adapted to further communicate control signals communicated to the lighting module to a neighboring lighting module.

Abstract: The present invention provides an LED module and an LED light string using the same. The LED module has an input terminal, an output terminal, a primary LED, a spare LED and a switching module. The switching module controls the spare LED to be switched off while the primary LED is switched on; and controls the spare LED to be switched on while the primary LED is burned out. Hence, the present invention extends a service life of the LED light string using the LED modules in the backlight module.

Abstract: A controller for controlling power to a light source includes a first sensing pin, a second sensing pin, a third sensing pin, and a driving pin. The first sensing pin receives a first signal indicating an instant current flowing through an energy storage element. The second sensing pin receives a second signal indicating an average current flowing through the energy storage element. The third sensing pin receives a third signal indicating whether the instant current decreases to a predetermined current level. The driving pin provides a driving signal to a switch to control an average current flowing through the light source to a target current level. The driving signal is generated based on one or more signals selected from the first signal, the second signal and the third signal.

Abstract: An LED (Light-Emitting Diode) driving circuit to drive an LED module is provided. The LED driving circuit includes a converting circuit and a feedback control circuit. The converting circuit is coupled to the LED module, and converts an input voltage into an output voltage according to at least one control signal. The feedback control circuit generates the control signal to control the converting circuit to perform voltage conversion according to a feedback signal. In addition, the feedback control circuit receives a dimming signal, and is operated in a first state or a second state in response to the dimming signal, wherein the feedback control circuit adjusts the duty cycle of the control signal to have the duty cycle larger than or equal to a predetermined duty cycle in a predetermined period right after the feedback control circuit is operated from the second state to the first state.

Abstract: A semiconductor light-emitting device includes at least one light-emitting chip. The light-emitting chip includes plural light-emitting units, which are electrically coupled to each other in series, in parallel or in series-parallel combination; a first-type electrode electrically coupled to an external power source, the first-type electrode being disposed on one of the light-emitting units; a second-type electrode disposed on another of the light-emitting units; and a tapped point for electrically coupling at least one of the light-emitting units to an electronic component.

Abstract: A lighting control system according to the embodiment includes a plurality of lighting fixtures, a lighting control unit, and an access point. The plurality of lighting fixtures are arranged in a lighting area. The lighting control unit is configured so as to control the lighting fixture. The access point transmits a layout chart of a different lighting area depending on an installation position of the access point.

Abstract: A luminous module for a luminous chain may include at least one light source; and at least one electrical connection configured to supply the at least one light source, wherein the luminous module includes a heat sink.

Abstract: Disclosed are a backlight unit and a display device. The backlight unit includes alight emitting module including a plurality of light emitting devices; a controller for controlling an operation of the light emitting module; a light guide plate disposed at one side of the light emitting module; and an optical member disposed on or under the light guide plate. The light emitting module includes a first light emitting device and a second light emitting device. Light linearity of the first light emitting device is superior to light linearity of the second light emitting device, and a light orientation angle of the first light emitting device is smaller than a light orientation angle of the second light emitting device. The controller selectively drives the first and second light emitting devices.

Abstract: An LED ballast mount preferably includes a housing assembly having sidewalls including a housing LED side wall and a housing opposite side wall. A rechargeable battery is installed in a battery assembly and the battery assembly includes a battery housing mounted to the housing LED side wall. A first LED lamp is mounted on a lower face of the battery housing. A first fluorescent lamp socket mounted on a ballast socket face of the battery housing. A second fluorescent lamp socket mounted on the ballast socket face of the battery housing. A bridge housing including an electronic ballast mounted within the bridge housing. Fluorescent tubes may be mounted in the device.

Abstract: In various embodiments, a startup circuit for a low-voltage-lighting electronic transformer includes a low-impedance output circuit. At the beginning of an AC signal cycle, the low-impedance output circuit presents a low-impedance path to the output of the transformer, thereby causing a surge of current in the transformer and initiating oscillation therein.

Abstract: A light emitting diode lamp includes: two first pins which are provided at one side thereof; two second pins which are provided at the other side thereof; a light emitting diode (LED) module which is disposed between the two first pins and the two second pins; a circuit connecting at least two of the two first pins and the two second pins to the LED module; and a protection circuit including a fuse which is disposed at a front end of the LED module to protect the LED module in case of generation of high voltage. The circuit is configured to have a direction from a front end of the LED module to the other end thereof as a forward direction.

Abstract: The disclosure provides a backlight module applied to a liquid crystal display device. The backlight module includes: a control circuit for outputting a driving signal according to an analog adjustment signal or a digital adjustment signal; a driving circuit for outputting a lamp voltage according to the driving signal; a fluorescent lamp set, including a plurality of lamps, for receiving the lamp voltage and thereby generating a lamp current; a lamp feedback circuit c for outputting a feedback signal according to the lamp voltage; and a dynamic protection circuit, for dynamically adjusting a protection command signal according to the analog dimming signal or the digital dimming signal, comparing the protection command signal and the feedback signal and thereby outputting a comparing result signal to the control circuit.

Abstract: Disclosed embodiments relate to techniques for enhancing luminance resolution in a backlight unit. A backlight unit may have light-emitting diode (LED) light sources arranged in strings. In one embodiment, a backlight controller provides enhanced luminance resolution by drive each LED string at either first or second consecutive luminance values corresponding to first and second duty cycles of a pulse width modulation (PWM) signal. The outputs of the LED strings are optically mixed to achieve intermediate luminance values between the first and second luminance values.

Abstract: The present invention provides a backlight module, and the backlight module has an LED module which has a plurality of light emitting diodes averagely divided into a plurality of light strings. Forward voltages of the light emitting diodes are between a minimum forward-voltage value and a maximum forward-voltage value, and each of the light strings at least has one first light emitting diode and one second light emitting diode. The first light emitting diode has the minimum forward-voltage value and the second light emitting diode has the maximum forward-voltage value. The backlight module is contributive to lower power loss on a constant current control circuit.

Abstract: The invention relates to GLS-look-alike LED light source (100) comprising two different types of LEDs (21, 22), preferably LEDs emitting with a near UV spectrum and a blue or white spectrum, respectively. The light source (100) further preferably comprises a transparent bulb (40) with a shape similar to an incandescent lamp that is coated by a luminescent layer (30) to achieve a white lamp spectrum. The luminescent layer may contain one or two luminescent compositions.

Abstract: In accordance with certain embodiments, an illumination system comprising a plurality of power strings features elements facilitating compensation for failure of one or more light-emitting elements connected along each power string.

Abstract: Systems, apparatuses, and methods are provided that include alterable characteristics and such alterable characteristics may be coordinated. Such systems, apparatuses, and methods may include wearable apparatuses and such alterable characteristics may relate to illumination conditions. In one example, a wearable apparatus includes an illumination device that may be manually manipulated between two different illumination conditions. In another example, two wearable apparatuses may each include an illumination device and operation of the two illumination devices may be coordinated. In a further example, operation of an apparatus may be controlled by a third party or venue. Still another exemplary system may include a capturing device for capturing a characteristic of an object and controlling an output device of an apparatus to operate with the same characteristic as the captured characteristic.

Abstract: An LED lighting system may include one or more light-emitting diodes and one or more power management modules. Components of the LED lighting system may be selected and arranged, for example, to match a load voltage to an operating voltage. Matching the load voltage to the operating voltage may enable efficient use of power by the LED lighting system. A method of selecting components of the LED lighting system is provided. For example, the components may be selected based on a target luminance and a given operating voltage. The method may be facilitated and/or implemented with a computer.

Abstract: A lighting system includes a master that controls a plurality of light fixtures via wireless RF communications. An ambient light sensor in the master is used to monitor total ambient light and to prevent excessive illumination. In an auto-calibration process, the master makes ambient light measurements A, B and C when the light fixtures are illuminating an area at a minimum setting, at a maximum setting, and at an intermediate setting, respectively. A first threshold is set to be approximately (B?A). A second threshold is set to be slightly larger than (B?A)+(B?C). In normal system operation, total ambient light measurements are taken and compared to the two thresholds. In one example, if detected brightness is lower than the first threshold then the system is set at its maximum illumination setting, whereas if detected brightness is greater than the second threshold then the system is set at its intermediate illumination setting.

Abstract: A portable distress light including a plurality of light emitting diodes (LED's) and a light mode switch to power the diodes so as to provide at least one of, and preferably at least two of, a flashing white light, a flashing infrared light, a flashing blue light, a flashing colored light, a steady colored light, and a steady white light. The LED's are segmented into two circuits, each circuit strobing the respective LED's, where the additive illumination of the LED's creates a single extended illumination period and a respective single dark period. The single extended illumination period can be generated by a series of quick illuminating cycles of the LED's of each of the two circuits, thus providing multiple illuminating pulses to create the single extended illumination period.

Abstract: Apparatus and associated methods involve operation of an LED light engine in which a relative intensities of selected wavelengths shift as a function of electrical excitation. In an illustrative example, current may be selectively and automatically diverted substantially away from at least one of a number of LEDs arranged in a series circuit until the current or its associated periodic excitation voltage reaches a predetermined threshold level. The diversion current may be smoothly reduced in transition as the excitation current or voltage rises substantially above the predetermined threshold level. A color temperature of the light output may be substantially changed as a predetermined function of the excitation voltage. For example, some embodiments may substantially increase or decrease a color temperature output by a solid state light engine in response to dimming the AC voltage excitation (e.g., by phase-cutting or amplitude modulation).

Abstract: A pre-programmed energy saving ballast or driver is presented, having a pre-defined energy profile to which the output power is controlled in accordance with the current time ascertained from the input power connection via simplex clock information or from received broadcast time signals, and which allows a user to select from a number of pre-programmed profiles and/or to modify and store user-defined energy profiles.

Abstract: In some examples, a dimming protocol detection technology includes methods and apparatuses. In other examples, the technology includes a dimmer configured to transmit a dimming input signal. The dimming input signal is in a dimming protocol. The technology further includes a light fixture. The light fixture includes a plurality of lights and a dimming protocol detection module configured to detect the dimming protocol received in the dimming input signal. The dimming protocol is detected from a plurality of dimming protocols. The light fixture further includes a light dimming control module configured to control the plurality of lights based on the detected dimming protocol.

Abstract: In one embodiment of the invention, the access control system comprises a door with an integrated mechatronic closing mechanism which is equipped with a receiver device. The receiver device is designed to receive and evaluate capacitive-resistive signals that are emitted by a transmitter and are transmitted via a user's body. The closing mechanism opens or does open the door in accordance with a result of said evaluation. In said one embodiment of the invention, the closing mechanism is battery-operated and has no permanent electric connection to an object that is not located on or in the door.

Abstract: Embodiments described herein provide a LED lighting system and method. A transformer has a primary winding and a secondary winding. A plurality of LED strings are coupled to the secondary winding of the transformer. At least one switch is coupled to at least one of the plurality of LED strings. A controller is coupled to the at least one switch and configured to control the operation of the at least one switch such that current flows through the plurality of LED strings in an alternating manner.

Abstract: A lamp ballast is provided for igniting and operating an HID lamp. A buck inverter circuit includes a pair of high-frequency and a pair of low-frequency switches. A capacitor and an inductor are series-connected between a first node between the low frequency switches and a second node between the high frequency switches. A lamp igniting circuit is coupled between the first node and a first lamp output terminal, and a second lamp output terminal is coupled to a third node between the capacitor and the inductor. A control circuit turns on and off the switches to regulate low frequency square wave voltage generated across the lamp output terminals to be less than an input DC voltage from the positive rail, wherein the buck inverter operates in either of a critical discontinuous mode or a discontinuous mode during an open circuit operation, and in a critical discontinuous mode during other operations.

Abstract: A low-voltage LED lighting system, LED lighting fixtures, and a method for installation thereof in which the system includes: (a) at least one LED lighting fixture each having one or more LEDs; (b) at least one remotely-located power driver; and (c) interconnections between the at least one LED fixture and the at least one driver using communication network cabling and standard 8P8C network connectors. Preferred lighting fixtures are recessed lighting fixtures adapted for ceiling mounting.

Abstract: A representative apparatus embodiment provides for controlling current supplied to solid state lighting, such as light emitting diodes. A representative apparatus comprises a memory adapted to store a plurality of current parameters, and a control circuit adapted to modulate an energizing cycle time period for providing a substantially constant DC average current to the solid state lighting in response to a selected current parameter from the plurality of current parameters. In a representative embodiment, the control circuit modulates a current provided to the solid state lighting in response to a predetermined minimum current level (IMIN) parameter and a predetermined peak current level (IP) parameter, such that the DC average current level (IO) is substantially proportional to one-half of a sum of a predetermined peak current level (IP) and a predetermined minimum current level IMIN ( I O ? I P + I MI ? ? N 2 ) .

Abstract: A light source driving apparatus is disclosed which includes a power supply including a power supply terminal connected to a first path through which a power source is supplied to a light source and including a feedback terminal for receiving a feedback of the power source supplied to the light source, a feedback resistor connected to the feedback terminal, and a current divider for branching a current flowing into the first path and supplying the branched current to the feedback resistor.

Abstract: An adapter for permitting a medical diagnostic instrument having an illumination source including at least one LED (light emitting diode) to be used with a power supply normally configured for use with a diagnostic instrument having at least one incandescent lamp as an illumination source. The adapter includes circuitry for compensating LED specific characteristics for permitting the power supply to be used with the LED.