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| Number | Title | Issue Date |
| 8188675 | Method for operating an illumination system with sequential color filtering and a high pressure discharge lamp The present invention relates to a method for operating an illumination system, which illumination system has a high pressure discharge lamp driven with a commutating lamp current (IL), and a color filter system for filtering the light of the high pressure discharge... | 05/29/2012 |
| 8188676 | Systems and methods for driving light-emitting diodes At least some embodiments include a LED driver system. The system includes multiple branches of series-coupled LEDs, multiple current sources, and control logic. Each of the current sources is coupled to a separate branch of series-coupled LEDs. The control logic is... | 05/29/2012 |
| 8188677 | Multi-function duty cycle modifier A system and method modify phase delays of a periodic, phase modulated mains voltage to generate at least two independent items of information during each cycle of the periodic input signal. The independent items of information can be generated by, for example, inde... | 05/29/2012 |
| 8183794 | Apparatus and methods for the thermal regulation of light emitting diodes in signage Apparatus and methods for the thermal management of one or more light emitting diode (LED) modules disposed within a channel sign are disclosed. The apparatus, in various aspects, detects the ambient temperature generally proximate the LED module and regulates the c... | 05/22/2012 |
| 8183792 | Backlight module with dynamic open-lamp protection and related driving method In order to provide open-lamp protection to a backlight module, a pseudo open-lamp voltage is first generated according to the current flowing through a light source. If the backlight module receives a mode signal corresponding to a high contrast mode, a compensatio... | 05/22/2012 |
| 8183791 | System and method for preventing low dimming current startup flash An electronic ballast is provided for powering a discharge lamp without visible flash at startup. The ballast includes an integrated circuit having at least one inverter drive output and a voltage controlled oscillator input. A first capacitor is coupled to the volt... | 05/22/2012 |
| 8183793 | Method for synthesizing anthracene derivative and anthracene derivative, light emitting element, light emitting device, electronic device It is an object to provide a novel method for synthesizing an anthracene derivative with the small number of steps. It is another object to provide a novel anthracene derivative. It is further another object to provide a light-emitting element, a light-emitting devi... | 05/22/2012 |
| 8183788 | Led luminance control circuit and backlight source of liquid crystal display The present invention discloses a LED luminance control circuit comprising one or several LEDs and a driving circuit, the driving circuit being connected in series with said one or several LEDs to provide energy to the one or several LEDs, wherein a control circuit ... | 05/22/2012 |
| 8183790 | LED reading light and method for operating an LED reading light The LED reading light, in particular for a passenger transportation vehicle such as, for example, an airplane, a bus, or a ship, is provided with two power supply connections (17) for connection to a power supply unit (16), an LED light means for givin... | 05/22/2012 |
| 8183789 | Lighting system for avionics applications and control method thereof Disclosed herein is a lighting system, in particular for an avionics apparatus, having at least a light source and a control unit coupled to the light source and controlling operation thereof based on a management PWM signal; the management PWM signal may have a sha... | 05/22/2012 |
| 8179056 | System and method for remote control lighting Remote lighting control methods, devices and systems are disclosed. One embodiment of the present invention pertains to a light device. The light device includes a light source for emitting light and a control circuit for setting an intensity level of the light sour... | 05/15/2012 |
| 8179057 | Electronic ballast for discharge lamp An electronic ballast for a discharge lamp includes a predictive circuit and a correction circuit in addition to a power conversion circuit including an inverter circuit and a resonant circuit, a drive circuit and a frequency control circuit. The inverter circuit ap... | 05/15/2012 |
| 8179058 | Determine a setting of a TRIAC dimmer through induced relaxation oscillation A system for controlling power delivered to a lighting system for controlling illumination. The system includes a TRIAC with an input capacitor connected in parallel to a phase delay circuit including a series combination of a potentiometer and a capacitor. A ramp v... | 05/15/2012 |
| 8174208 | Driver for operating a gas discharge lamp The present invention relates to a driver for driving a gas discharge lamp. In use, the tips of a conventional lamp's electrodes are subject to tip growth and tip destruction, resulting in decreased or increased arc length, respectively. This has an undesirable effe... | 05/08/2012 |
| 8174207 | Lamp and driving device for backlight assembly having the same A device for driving a backlight assembly includes a controller for outputting a control signal, a switching unit for outputting a DC square wave voltage in response to the control signal, an inverter for converting the DC square wave voltage into an AC voltage and ... | 05/08/2012 |
| 8174206 | Encoding device for light-emitting-diode lamp, lamp, and controlled lighting system A controlled lighting system includes an encoding device and a lamp. The encoding device includes a rectifier for rectifying an AC voltage input to result in a rectified signal, and an encoder for generating an encoded signal from the rectified signal and display da... | 05/08/2012 |
| 8174204 | Lighting system with power factor correction control data determined from a phase modulated signal A light emitting diode (LED) lighting system includes a power factor correction (PFC) controller that determines at least one power factor correction control parameter from phase delays of a phase modulated signal. In at least one embodiment, a peak voltage of the p... | 05/08/2012 |
| 8174205 | Lighting devices and methods for lighting A lighting device comprises groups of solid state light emitters, a sensor and circuitry. If the emitters are illuminated, the sensor is exposed to combined light from the groups, and senses only a portion of the combined light. The circuitry adjusts current applied... | 05/08/2012 |
| 8169156 | Control method capable of preventing flicker effect and light emitting device thereof A control method capable of preventing flicker effect for a light source module includes detecting variation situations of a driving current passing through the light source module to generate a current detection signal, adjusting a variable reference voltage accord... | 05/01/2012 |
| 8169154 | Variable load circuits for use with lighting control devices A variable load circuit (2) is provided for use with a dimmer (1). A low wattage load such as a LED (3) is provided in series with the dimmer and the variable load circuit is provided in parallel with the LED. The variable load circuit has two d... | 05/01/2012 |
| 8169155 | Method of driving light source, light source driving apparatus for performing the method, and display apparatus having the light source apparatus A method of driving a light source includes adjusting a number of duty adjustments of driving signals driving light sources based on a dimming control signal and adjusting each duty ratio of each of the driving signals provided to each of the light sources in accord... | 05/01/2012 |
| 8164272 | 8-pin PFC and ballast control IC The present invention relates to a fluorescent ballast control integrated circuit (IC) with power factor correction (PFC), and more particularly to a ballast control IC with a low pin count and improved programmability. The invention relates further to control metho... | 04/24/2012 |
| 8164273 | Light emitting diode circuits for general lighting Improved electric circuits that minimize, or eliminate, energy losses in the supply of energy to and control of LEDs. Addition of diodes and a capacitor to a circuit reduces or eliminates LED blinking, creates smooth and continuous infinitely variable dimming. The c... | 04/24/2012 |
| 8164274 | Product display system, and method for illuminating a product The invention provides a product display system and a method for illuminating a product. The product display system 1′ comprises a product carrier (20, 4′) and a lighting device comprising a plurality of light sources (10), each having two o... | 04/24/2012 |
| 8164275 | Drive circuit for high-brightness light emitting diodes A drive circuit includes a DC/DC converter, an outer control loop providing an output voltage representing a comparison between a load current and a reference voltage, a multiplier multiplying the outer control loop output voltage with a sample of the rectified outp... | 04/24/2012 |
| 8159146 | Apparatus and method for pulsed L.E.D. illumination An illumination source for a camera includes one or more LEDs, and an electrical circuit that selectively applies power from the DC voltage source to the LEDs, wherein the illumination source is suitable for handheld portable operation. In some embodiments, the elec... | 04/17/2012 |
| 8159144 | Motor vehicle headlight element A motor vehicle headlight element is specified which has at least one light-emitting diode and at least one control apparatus. The control apparatus is suitable for processing a signal which is dependent on a measurement variable and for applying a current correspon... | 04/17/2012 |
| 8159145 | Synchronous operating system for discharge tube lighting apparatuses, discharge tube lighting apparatus, and semiconductor integrated circuit A synchronous operating system for operating a plurality of discharge tube lighting apparatuses at the same frequency and same phase includes (1) an oscillator of a triangular wave signal whose inclination for charging a capacitor C2 and inclination for disch... | 04/17/2012 |
| 8159143 | Light generating module, liquid crystal display device having the same, and method of improving color reproducibility thereof A light generating module includes a light emitting part and a power supplying part. The light emitting part includes a first region and a second region. First and second lights having different wavelengths from each other are generated in each of the first and seco... | 04/17/2012 |
| 8154217 | Driver circuit, method for operating and use of a current mirror of a driver circuit A driver circuit, operating method, and use of a current mirror of a driver circuit is provided that includes at least one output transistor, a reference network with at least one reference transistor, a switching device, which is connected to the control input of t... | 04/10/2012 |
| 8154218 | Method and apparatus for retrofitting HID lamps with system to periodically adjust operating wattage A method, apparatus, and system for increasing usable light from a high intensity lighting fixture to a target area without an increase in energy use. In one aspect, the circuit is retrofitted into an existing lamp circuit that allows selective change in operating p... | 04/10/2012 |
| 8148915 | Electronic ballast device and operation method thereof An electronic ballast device includes a stabilizer and a sweep frequency circuit for preheating. The stabilizer includes a first input terminal, a second input terminal and an output terminal connected to a fluorescent lamp. The sweep frequency circuit includes a bo... | 04/03/2012 |
| 8148916 | Driving device of a light source module, light source module having the driving device, driving method of the light source module, and display device having the driving device A light source module includes a plurality of light-emitting blocks. A local-dimming driver drives the light-emitting blocks based on a received clock signal (first reference clock) and received dimming levels. The clock signal is input to a liquid crystal display p... | 04/03/2012 |
| 8148912 | Lighting device with staggered light sources responsive to a single user control Various lighting devices and related methods of operation are provided which may be used to adjust brightness levels of a plurality of light sources in a staggered fashion in response to a single user control. In one example, a lighting device includes a plurality o... | 04/03/2012 |
| 8148913 | Active enclosure for computing device A computing device is disclosed. The computing device includes a housing having an illuminable portion. The computing device also includes a light device disposed inside the housing. The light device is configured to illuminate the illuminable portion. ... | 04/03/2012 |
| 8148917 | Flashlight A flashlight in accordance with an aspect of the invention includes an ID module for generating an ID signal indicative of a power mode of the flashlight. In an aspect, the flashlight mates with a removable battery pack that regulates at least one of an output volta... | 04/03/2012 |
| 8148914 | Dynamic power saving pulse width modulated LED driver circuit In accordance with an aspect of the present invention, an LED driving circuit includes a digital-to-analog converter and a driving portion. The circuit is operable to turn off the digital-to-analog converter at times when the driving portion is not providing a high ... | 04/03/2012 |
| 8143804 | Light source driving device A light source driving device includes a power factor correction (PFC) circuit, a power stage circuit, a power conversion circuit, a balancing circuit, an inverter control signal processor, an inverter controller and an isolation component. Alternating current (AC) ... | 03/27/2012 |
| 8143805 | System and method for selectively dimming an LED Embodiments of the present disclosure include an LED ballast circuit for dimming one or more LEDs using a phase controlled dimmer switch. The LED ballast circuit has a power conditioning unit which includes a substantially fixed duty cycle clock for outputting a clo... | 03/27/2012 |
| 8143806 | Multiple location dimming system A multiple location dimming system comprises a plurality of dimmers coupled between an AC power source and a lighting load. Each of the plurality of dimmers is operable to control the intensity of the lighting load and comprises a controllably conductive device, e.g... | 03/27/2012 |
