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7635957 |
LED temperature-dependent power supply system and method
A LED based lighting system ( 20 ) employs a LED load temperature sensor ( 40 ) for generating a temperature-sensing signal (TSS) indicative of an operational temperature of the LED load ( 10 ), a...
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7635958 |
Lighting control system and control system
The present invention includes a lighting control system provided with two or more lighting devices and one or more illumination comparing devices; wherein the illumination comparing device...
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7633406 |
Lighting control system
The present invention is a lighting control system including at least one local device and a plurality of lighting devices. The communication transmission medium between the local device and the...
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7633240 |
Lamp driving apparatus having balance circuit units for a display
A lamp driving apparatus wherein a plurality of two-winding balance circuits are connected to a plurality of parallel-connected lamp groups so that all of the lamps may be illuminated even though...
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7633239 |
Dimming circuit for controlling electrical power
A dimming circuit includes an isolated DC voltage source that is selectively coupled to a switch through which power is supplied from a source to a load. In a disclosed example, the switch...
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7626342 |
High efficiency power controller for solid state lighting
A high efficiency power controller comprising of a driver circuit to convert to direct current (DC) voltage from alternating current (AC) voltage is used for drive solid state lighting (SSL)...
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7622870 |
Inverter apparatus
A switching circuit includes a plurality of transistors connected to a primary winding of the transformer and alternately applies an input voltage and a ground voltage to the primary winding...
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7619370 |
Power allocation methods for lighting devices having multiple source spectrums, and apparatus employing same
Methods for allocating power amongst different source spectrums, or “channels,” of a multi-channel lighting unit, and apparatus that employ such methods. Power allocation methods exploit the...
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7619368 |
Power source apparatus
A power source apparatus is disclosed in this invention, specifically a power source apparatus comprising a voltage amplitude control unit that employs an active power factor corrector to control...
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7614771 |
Wireless controlled light emitting assembly
A light emitting assembly and a system utilizing a plurality of light emitting assemblies having a plurality of light emitting elements arranged and disposed within a sub-assembly. The assembly...
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7615939 |
Spectrally calibratable multi-element RGB LED light source
An LED lighting system is disclosed. The lighting system includes means to calibrate the light temperature and intensity between multiple modules in one system, or to calibrate the light...
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7609006 |
LED light string with split bridge rectifier and thermistor fuse
A string of lights has an electrical plug at one end and a receptacle at the other end and plural light-emitting diodes (LEDs) in series with a negative temperature coefficient (NTC) thermistor....
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7605809 |
Driver and method for driving a semiconductor light emitting device array
A driver and method for driving a semiconductor light emitting device array is provided. The driver includes at least one current regulator unit having a plurality of controllable switches to...
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7605544 |
Current balancing circuit
A current balancing circuit for first and second lamp sets includes a step-up transformer and a current balancer. The step-up transformer is adapted to be coupled to a power supply for receiving an...
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7605547 |
Addressable LED architecture
The present disclosure provides an addressable light emitting diodes (LED) architecture that is able to control a plurality of LEDs individually. The present disclosure further provides a method of...
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7605550 |
Controlled bleeder for power supply
An LED backlighting system including: a control circuit; a power source; at least one LED string associated with the power source, the at least one LED string being arranged to be switchably...
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7598859 |
Method and system for controlling lighting
A method and system for controlling lighting in a space reduces energy consumption of the light sources by changing at least one of the color rendering index (CRI) and the correlated color...
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7598683 |
Control of light intensity using pulses of a fixed duration and frequency
A method and circuit to control the intensity of lights, illumination fixtures, and displays using pulses of a fixed duration and a fixed frequency (FD/FF) is provided. In particular, the method...
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7598686 |
Organic light emitting diode methods and apparatus
Organic light emitting diode (OLED) methods and apparatus in which at least one first OLED generates first radiation having a first spectrum, and at least one second OLED generates second radiation...
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7598679 |
Integrated circuit capable of synchronization signal detection
A method according to one embodiment may include providing power to at least one light source. The method of this embodiment may also include detecting the frequency of at least one vertical...
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7598681 |
Methods and apparatus for controlling devices in a networked lighting system
Disclosed are various methods and apparatus for controlling illumination sources in a networked lighting system. For example, disclosed is an integrated circuit to control at least one illumination...
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7598685 |
Off line LED driver with integrated synthesized digital optical feedback
The present invention creates an LED driver in which all feedback signals are derived from a power stage media, and presents an isolated off-line LED driver with an accurate primary side controller...
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7595786 |
Illumination system and illumination control method for adaptively adjusting color temperature
This invention discloses an illumination method and an illumination control method. An embodiment of the illumination system includes two light detection modules for detecting a light produced by a...
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7593241 |
Hybrid power supply system
A hybrid power supply system including piezoelectric and ferrite transformers for driving a discharge lamp is provided. Specifically, the hybrid power supply system includes a rectifier/filter, a...
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7592753 |
Inductively-powered gas discharge lamp circuit
An inductively powered gas discharge lamp assembly having a secondary circuit with starter circuitry that provides pre-heating when power is supplied to the secondary circuit at a pre-heat...
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7592756 |
Driving circuit for light emitting diodes
A driving circuit includes a DC-to-DC voltage converter, a current source, a detector and a feedback control circuit. The DC-to-DC voltage converter has a switch and generates a driving voltage on...
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7589478 |
Inverter circuit for discharge lamps for multi-lamp lighting and surface light source system
An inverter circuit for discharge lamps for multi-lamp lighting in which the value of a negative resistance characteristic of a fluorescent lamp is controlled, and an excessively set reactance is...
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7586268 |
Apparatus and method for controlling the filament voltage in an electronic dimming ballast
An electronic dimming ballast comprises a filament turn-off circuit for controlling the magnitudes of filament voltages supplied to the filaments of a gas discharge lamp. Each of a plurality of...
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7586273 |
Method and apparatus for achieving perceived light mixing via alternating different colored LEDS
A method and apparatus for achieving perceived light mixing via alternating colored light emitting diodes (LEDs) is disclosed. For example, a control signal to produce a requested color output is...
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7586271 |
Efficient lighting
A light source includes a plurality of lighting elements arranged to illuminate different regions of visual perception. Circuitry coupled to the light source is configured to supply power to a...
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7583035 |
System and method for driving LED
A system drives one or plurality of LEDs regulating their brightness by controlling LEDs average current or voltage. The system includes a switching power converter and an integrated digital...
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7579790 |
Multiple gas discharge lamp interleave trigger circuit
Embodiments are disclosed for apparatus and methods for increasing the reliability of the flash discharge response in pulsed gas discharge lamps. One embodiment includes a system comprising two gas...
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7579786 |
Method, apparatus, and system for driving LED's
A method and apparatus for driving LED's is disclosed, comprising the steps of receiving a desired intensity value, wherein the desired intensity value represents the desired intensity for the...
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7573210 |
Method and system for feedback and control of a luminaire
A method and system for controlling the chromaticity and luminous flux output of a digitally controlled luminaire. The luminaire includes one or more light-emitting elements and one or more light...
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7571063 |
Lighting performance power monitoring system and method with optional integrated light control
A light performance monitoring device and optionally integrated controller includes a monitor module that directly monitors energy usage of at least one energy load to generate at least one...
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7564193 |
DC-AC converter having phase-modulated, double-ended, full-bridge topology for powering high voltage load such as cold cathode fluorescent lamp
A phase-modulated, double-ended, full-bridge topology-based DC-AC converter supplies AC power to a load, such as a cold cathode fluorescent lamp used to back-light a liquid crystal display. First...
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7564201 |
Intelligent gas discharge lamp control circuit
An electronic control circuit for intelligently controlling a gas discharge lamp associated with an HVAC system. The circuit includes a microcontroller having a memory containing instructions...
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7560880 |
Control device for work lamp
A control device for work lamp includes a microprocessor, which is able to receive signals sent from a power supply unit and a switch. The microprocessor is able to determine the number of times...
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7560876 |
Light device and control method thereof
Provided is a light device. The light device according to one embodiment comprises a backlight unit, a plurality of color sensors, a backlight unit driver, and a backlight unit controller. The...
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7557524 |
Lighting device
An LED lighting device is provided which is capable of being connected to a network and being controlled by a host computer also connected to the network. The lighting device has several lifespan...
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7557521 |
LED power control methods and apparatus
Methods and apparatus for providing and controlling power to loads including one or more LEDs. In one example, a controlled predetermined power is provided to a load without requiring any feedback...
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7554273 |
Protection for external electrode fluorescent lamp system
The present invention provides a driving circuit with protection function for driving a set of external electrode fluorescent lamps (EEFL). The drive circuit includes: a transformer connected to...
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7550929 |
Power system and method for driving plural lamps
A power system for driving plural or multiple lamps includes a transformer circuit, a filter and steady-flow circuit, and a light source. The transformer circuit transforms a voltage level of an...
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7551153 |
Combined exponential/linear RGB LED I-sink digital-to-analog converter
Methods and systems to achieve linear and exponential control over a current to drive color LEDs have been achieved. Current digital-to-analog converters (IDAC) comprising each an exponential...
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7550934 |
LED driver with fast open circuit protection, short circuit compensation, and rapid brightness control response
An LED driver drives one or more strings of series-connected LEDs. A feedback voltage at a sense resistor is detected by an op amp, and the op amp controls the conductivity of a MOSFET in series...
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7550931 |
Controlled lighting methods and apparatus
Described herein are lighting units of a variety of types and configurations, including linear lighting units suitable for lighting large spaces, such as building exteriors and interiors. Also...
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7550935 |
Methods and apparatus for downloading lighting programs
Methods and apparatus for downloading one or more lighting programs including one or more lighting effects. The lighting program(s) may be downloaded from a web site to one or more LED-based...
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7548150 |
Method for the allocation of short addresses in illumination systems
In a method for the allocation of short addresses in illumination systems, whose illumination components (DALI EB, Lp) are controlled via a DALI bus, the short address is determined and allocated...
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7547113 |
Full-color LED-based lighting device
A LED full-color lighting device contains a control unit, a light source unit, and a light display unit. The control unit relies on at least a potentiometer to apply various voltages to constant...
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7545106 |
Discharge lamp driving device and driving method
A discharge lamp driving device for driving a lamp module ( 23 ) including a plurality of lamps includes a switch circuit ( 21 ), a transformer and filter circuit ( 22 ), and a microcontroller ( 20...
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