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| Number | Title | Issue Date |
| 8446100 | Interconnected arrangement of individual modules having at least one light-emitting diode chip An interconnected arrangement of a light-emitting diode chip arrangement having individual modules as luminous elements in a parallel circuit. Each module is provided with at least one light-emitting diode chip, and the modules are arranged in a parallel circuit. A ... | 05/21/2013 |
| 8446102 | Lighting control failsafe circuit A system may include a switch arranged to control a lighting load, a processor arranged to control the switch, and a failsafe circuit arranged to monitor the processor and actuate the switch if the processor fails. The failsafe circuit may have a time constant, and ... | 05/21/2013 |
| 8446103 | Lamp driver There is provided a lamp driver including: a power supplying part switching an input power, supplying a driving power to at least one lamp, and controlling brightness of the at least one lamp according to a dimming signal; a signal supplying part supplying a first c... | 05/21/2013 |
| 8446101 | Control switch A method and apparatus are provided for operating a control switch. In one embodiment, the control switch includes an input terminal coupled to an alternating current (AC) power supply, a load terminal coupled to a load, a triac circuit coupled to the input terminal... | 05/21/2013 |
| 8441205 | Dimming apparatus transmitting control signals with AC power line A dimming apparatus transmitting control signals with AC power line (10) is applied to an alternating current power source (20), a light emitting diode driving power unit (40), and a light emitting diode unit (30). The dimming apparatus t... | 05/14/2013 |
| 8441206 | 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... | 05/14/2013 |
| 8441204 | Power supply device and lighting equipment provided with power supply device A power supply device according to one embodiment is configured to control a lighting of semiconductor light-emitting elements, wherein a dimming signal is canceled during a predetermined time period (T) from a timing immediately after power-ON, so as to light on li... | 05/14/2013 |
| 8441203 | Dimming electronic ballast for true parallel lamp operation A dimmable and program start electronic ballast is configured for powering one or more lamps in a true parallel configuration. An inverter driver is coupled to each gate of a pair of inverter switches and is responsive to at least a reference input signal and a feed... | 05/14/2013 |
| 8441202 | Apparatus and method for LED light control An illumination apparatus comprises a plurality of LEDs and a control system connected to receive dimmer-modulated AC line voltage and control the LEDs. The control system is configured to operate in a plurality of different modes wherein changes in dimmer-modulated... | 05/14/2013 |
| 8436553 | Tri-light A lighting arrangement includes a light fixture including a plurality of light sources wherein each light source is configured to generate a different color light when energized; and a circuit arrangement included in the light fixture and operatively interposed betw... | 05/07/2013 |
| 8436551 | Arc discharge detecting circuit, light source driving apparatus having the same and method of driving a light source using the same An arc discharge detecting circuit includes; a voltage dividing part which divides a driving voltage provided to a light source, a detecting part which includes a loop-shaped wiring spaced apart from the voltage dividing part and which detects a current correspondin... | 05/07/2013 |
| 8436549 | Drive circuit for a color temperature tunable LED light source A drive circuit for a color temperature tunable LED light source. An apparatus includes a current driver configured to output a first drive current to drive a first group of LED chips of the light source to emit first color temperature light and to output a second d... | 05/07/2013 |
| 8436550 | LED lamp driving circuit with dimming capability An LED driving circuit includes a dimming control value detection circuit adapted to detect a dimming control value which indicates a ratio of the actual current to be supplied from a current source to the driving circuit during a predetermined time period with resp... | 05/07/2013 |
| 8436552 | Power source control device of illuminator and lighting system A power source control device for controlling an illuminance of an illuminator by outputting a current for driving the illuminator and by controlling the current, including: a receiver for receiving a wireless signal having a predetermined frequency; a storage secti... | 05/07/2013 |
| 8436548 | Dimmer conduction angle detection circuit and system incorporating the same A conduction angle detection circuit, and systems and methods incorporating the same, is disclosed. The circuit includes a comparator having a first input and a second input, and configured to provide a pulse-width modulated output in response to comparison of signa... | 05/07/2013 |
| 8432105 | Light control apparatus for lighting an organic electroluminescence device and lighting appliance using the same A light control apparatus and a lighting appliance using the same enable increased luminous efficiency in light control and elongated operative life of a light source. The lighting appliance includes a light source and a light control apparatus. The light control ap... | 04/30/2013 |
| 8432106 | Microcontroller-optimized pulse-width modulation (PWM) drive of a light-emitting diode (LED) A method for operating a controlled illumination apparatus, the illumination apparatus comprising at least one pulse-width modulation (PWM)-controlled LED, the method comprising carrying out a duty cycle sweep of the PWM signal driving the LED while sensing at least... | 04/30/2013 |
| 8432107 | Backlight module, over-temperature protection circuit and over-temperature protection method thereof An over-temperature protection circuit is adapted to a light source driver coupled to a light-emitting device. The light source driver has a current setting terminal receiving a set current to control the magnitude of a current flowing through the light-emitting dev... | 04/30/2013 |
| 8427070 | Lighting circuit and illumination device A lighting circuit according to embodiments includes: a self-hold element connected in series to an AC power source that generates power for lighting an illumination load, together with the illumination load, the self-hold element being configured to control supply ... | 04/23/2013 |
| 8427071 | Light emitting diode driving device with a simple structure and an enhanced efficiency An LED driving device includes: an LED circuit having an input side for receiving a driving current corresponding to an AC input voltage from an external power source when the magnitude of a driving voltage across the input side is greater than a predetermined value... | 04/23/2013 |
| 8427068 | Reference signal generator and PWM control circuit for LCD backlight There are provided a reference signal generator and a PWM control circuit for LCD backlight. The reference signal generator and the PWM control circuit for LCD backlight may be configured to respectively include: a current control unit that controls generation of a ... | 04/23/2013 |
| 8427069 | Current-regulated power supply with soft-start protection A current-regulated power supply provides soft-start protection to prevent the generation of large in-rush currents. The current-regulated power supply includes a current regulation module that operates in either a soft-start mode of operation or a normal mode of op... | 04/23/2013 |
| 8421367 | Light-emitting diode light source and light-emitting diode lamp A light-emitting diode (LED) light source suitable for being electrically connected with a power line is provided. The LED light source includes an LED array, a power line communication (PLC) unit and a current control unit. The PLC unit is electrically connected wi... | 04/16/2013 |
| 8421369 | Light emitting diode having protection function The present invention relates to a light emitting diode driver having a protection function that activates hiccup mode for a predetermined period of time when a light emitting diode performs an abnormal operation to thereby protect the light emitting diode. A light ... | 04/16/2013 |
| 8421371 | LED drive circuit, LED illumination fixture, LED illumination device, and LED illumination system An LED drive circuit in which an alternating voltage is input and an LED is driven, and which can be connected to a phase control dimmer The LED drive circuit is provided with an edge detector for detecting an edge of the output voltage of the phase control dimmer; ... | 04/16/2013 |
| 8421372 | Frequency converted dimming signal generation There is provided a lighting control circuit comprising a duty cycle detection circuit, an averaging circuit, a waveform generator and a comparator circuit. The duty cycle detection circuit generates a first periodic waveform having a duty cycle and frequency corres... | 04/16/2013 |
| 8421368 | 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 may be used to control one more light sources. By varying the number of... | 04/16/2013 |
| 8421370 | Apparatus for driving a light emitting diode An apparatus for driving a light emitting diode (LED) comprises: an LED unit configured as a plurality of LEDs are serially connected to each other; a rated current providing unit connected to one end of the LED unit, for providing a current to the LED unit under co... | 04/16/2013 |
| RE44133 | Fixed operating frequency inverter for cold cathode fluorescent lamp having strike frequency adjusted by voltage to current phase relationship A method of driving a lamp that uses a DC to AC inverter that is connected to a primary winding of a transformer is disclosed. The inverter frequency is variable, and in one embodiment, may be controlled by a voltage controlled oscillator. Circuitry is included that... | 04/09/2013 |
| 8415896 | Current-type driver of light emitting devices A current-type driver of light emitting devices is provided. The current-type driver includes a power conversion circuit, a feedback module, and a control module. The power conversion circuit modulates and generates an output voltage according to a feedback signal s... | 04/09/2013 |
| 8410719 | Electronic ballast and method for controlling at least one light source An electronic ballast for driving at least one light source may include an input for connecting a supply voltage; an output configured to connect the at least one light source; an oscillator, which is designed to provide an oscillator output signal with a first freq... | 04/02/2013 |
| 8410717 | Apparatus, method and system for providing AC line power to lighting devices An apparatus, method, and system are disclosed for providing AC line power to lighting devices such as light emitting diodes (“LEDs”). A representative apparatus comprises: a plurality of LEDs coupled in series to form a first plurality of segments of LEDs; a pl... | 04/02/2013 |
| 8410718 | Dimmer conduction angle detection circuit and system incorporating the same A dimmer conduction angle detection circuit, and systems and methods incorporating the same, is disclosed. The circuit receives a gate drive signal from a PFC circuit and provides a dimmer reference level signal representative of a dimmer circuit's dimmer setting in... | 04/02/2013 |
| 8410715 | Method of driving light sources, device for driving light sources, and display device having the same One or more embodiments of the present disclosure provide a method for driving light sources, a device for driving light sources and a display device having the device for driving the light sources. Power information is read based on position information on the ligh... | 04/02/2013 |
| 8410716 | Control of multi-string LED array Apparatus, systems, and methods related to controlling multiple strings of light emitting diodes (LEDs) are disclosed. An apparatus may include internal current limiter circuits that are each coupled in series with an associated string of LEDs and are configured to ... | 04/02/2013 |
| 8405320 | Circuit and method for controlling light emitting device, and integrated circuit therefor The present invention provides a transistor switch on a light emitting device channel, the transistor switch receiving a control voltage VG. A current source circuit controls the current on the light emitting device channel, the current source circuit requiring a mi... | 03/26/2013 |
| 8405318 | Light-emitting component and its manufacturing method In a light emitting component, a resistor element is formed on the back surface of a substrate and its resistance value is adjusted to make the light intensity of a light emitting element (LED) in a predetermined range. A constant electric current circuit comprised ... | 03/26/2013 |
| 8405319 | Universal dimmer Various embodiments of a universal dimmer are disclosed. In one embodiment of a universal dimmer, a power limiting switch is connected to an input voltage. An output driver in the universal dimmer includes a power input and a load path, with the power input being co... | 03/26/2013 |
| 8400073 | Backlight unit with controlled power consumption and display apparatus having the same In a display apparatus having a backlight unit, a light unit includes plural light source strings commonly connected to an output terminal of a boosting circuit to generate light in response to a light source driving voltage. The light source strings are grouped int... | 03/19/2013 |
| 8400074 | Electronic ballast with feedback current control for preheating of lamp filaments A discharge lamp ballast is provided for powering a discharge lamp with feedback filament heating control. A startup circuit is coupled between output terminals of a DC-AC power converter together with a discharge lamp. A lamp current detection circuit and a lamp vo... | 03/19/2013 |
