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| Number | Title | Issue Date |
| 8179059 | Circuit and method for controlling light emitting device, and integrated circuit therefor The present invention discloses a circuit and a method for controlling a light emitting device, and an integrated circuit therefore. The circuit for controlling a light emitting device comprises: a power stage controller circuit controlling a power stage circuit to ... | 05/15/2012 |
| 8169158 | Cold cathode tube lighting device A cold cathode tube lighting device prevents emission-position-dependent unevenness from occurring in the brightness of light emitted from the cold cathode tube lighting device and includes a plurality of discharge tubes connected in parallel; ballast capacitors eac... | 05/01/2012 |
| 8143812 | Clamp to enable low voltage switching for high voltage terminal applications An output stage for an LED driver is provided. In particular, a low voltage clamp, which uses several cascode circuits, is provided to protect low voltage switching transistors in the range of two times higher voltage application under both normal and fault conditio... | 03/27/2012 |
| 8143811 | Lighting control system and method Lighting devices are configured to communicate with one another and with external systems. Sensors located at such lighting devices communicate with the external systems and with others of the lighting devices. Lighting is controlled to maintain safety, to drive cus... | 03/27/2012 |
| 8143810 | Drive device for LEDs and related method A LED driver arrangement including a switching-mode stage to produce a drive current for feeding a LED from a DC input; a current sensor for the current fed to the LED for producing a feedback signal; error amplifier circuitry for generating a control signal from th... | 03/27/2012 |
| 8106603 | Backlight driving circuit A backlight driving circuit includes a light driving unit, which includes a constant current unit, and a light source operated by the constant current unit. The light driving unit further includes a feedback control unit and a detection circuit. The detection circui... | 01/31/2012 |
| 8098026 | Lighting control circuit The present invention is directed to an LED light system that comprises a control circuit that operates on a pair of 1.5 volt batteries but which generates an operational voltage in excess of 3.0 volts. The lighting system includes a boost circuit that raises the op... | 01/17/2012 |
| 8084960 | Circuits and methods for powering light source with balanced currents A light source driving circuit for powering multiple light sources in a vehicle includes multiple current limiters and a balance controller. The current limiters are coupled to the light sources for adjusting currents of the light sources respectively. The balance c... | 12/27/2011 |
| 8072159 | Multi-lamp driving circuit A multi-lamp driving circuit for driving a plurality of lamps includes at least one power stage circuit, at least one transformer circuit, a balancing circuit, and a control circuit. The power stage circuit converts external electrical signals to alternating current... | 12/06/2011 |
| 8067901 | Bi-directional light emitting diode drive circuit in pulsed power parallel resonance The present invention is characterized by using capacitive, inductive or resistive impedance to constitute the first impedance which is series connected with the second impedance constituted by parallel connecting the capacitive and inductive impedances that appears... | 11/29/2011 |
| 8058819 | Illumination system An illumination system includes a plurality of illumination devices and a number of sensor blocks. In each of the sensor blocks, an active sensor is provided to detect a moving object traveling within a detection area thereof and plural amplifier circuits is provide... | 11/15/2011 |
| 8058818 | LED driving circuit and a MOSFET switch module thereof An LED driving circuit and a MOSFET switch module thereof is disclosed, and the MOSFET switch module which is used to control a current of the LED driving circuit. The present invention employs a voltage clamping device to clamp the voltage level of the drain of tra... | 11/15/2011 |
| 8058817 | Power systems with current regulation A power system includes a current regulator coupled to a load and for generating an output current having a substantially constant ripple magnitude, and for adjusting the output current according to a sense signal indicative of the output current. In addition, the p... | 11/15/2011 |
| 8049437 | System and method for real time control of lighting system A method for real time control of lighting system includes the steps of: providing a computer, a SCM (2), a digital-to-analog converter (3), and at least one power amplifier (41, 42, 43) connected to the digital-to-analog converter, each of the ... | 11/01/2011 |
| 8049439 | LED driver with dynamic headroom control A voltage source provides an output voltage to drive a plurality of light emitting diode (LED) strings. A LED driver adjusts the level of the output voltage so as to maintain the lowest tail voltage of the LED strings at or near a predetermined threshold voltage so ... | 11/01/2011 |
| 8049438 | Driving circuits and controllers for controlling power to a load A driving circuit for driving loads includes a switch circuit, a transformer, a current sensing circuit, and an inverter controller. The switch circuit and the transformer are used for converting a DC electric power to an AC electric power so as to energize the load... | 11/01/2011 |
| 8044610 | LED driver with adaptive algorithm for storage capacitor pre-charge A method is provided for driving a plurality of light emitters in a plurality of output paths with each output path including at least one light emitter. The method includes the steps of applying a supply voltage level to a plurality of output paths; generating a cu... | 10/25/2011 |
| 8044611 | LED control device An LED controller is provided that can easily control light-on testing of LEDs. A super voltage can be added to a signal including a low voltage and a high voltage. When the super voltage is not detected, LED driving circuit is operated in normal mode. When the supe... | 10/25/2011 |
| 8035314 | Method and device for LED channel managment in LED driver Disclosed are example open channel detection techniques at a light emitting diode (LED) driver of an LED system. The LED driver does not enable its LED channels before normal operation so as to inhibit current flow through the LED channels during start-up. While the... | 10/11/2011 |
| 8022641 | Recessed LED down light In an embodiment of the present invention, a light emitting diode (LED) recessed down light fixture comprises a housing, a reflector assembly mounted to the housing, and an LED circuit board attached to the housing over the reflector assembly. The LED circuit board ... | 09/20/2011 |
| 7994735 | Solar-controlled light device A solar-controlled light device with a circuit-control having a phototransistor, a first resistor, and a first transistor connected to a storage unit, to a solar cell, and to a current-control. The current-control has a transformer, a second resistor, and a second t... | 08/09/2011 |
| 7986108 | LED driver and start-up feedback circuit therein An LED driver includes a start-up feedback circuit, an operating feedback circuit and a multiplexer. The start-up feedback circuit has first terminals for receiving LED feedback voltages each delivered from at least one LED coupled to an output terminal for outputti... | 07/26/2011 |
| 7973495 | Adaptive control apparatus and method for a solid state lighting system The present invention provides a method and apparatus for adaptive control of a solid-state lighting system consisting of one or more groups of one or more light-emitting elements The invention comprises a voltage control device to provide each group with an indepen... | 07/05/2011 |
| 7973496 | Resonant driver with low-voltage secondary side control for high power LED lighting The present invention relates to a power supply device for supplying power to a load, preferably a LED, comprising a first circuitry (12) with an inverter unit (24) adapted to provide an AC voltage, preferably a rectangular voltage, and a resonant circ... | 07/05/2011 |
| 7965048 | Switching converter for lighting with light intensity as feedback and light emitting apparatus using the same A light emitting apparatus comprises a light emitting element and a switching converter comprising a conversion circuit for converting an operating electric signal to generate the driving electric signal, a feedback circuit having a light detecting element for detec... | 06/21/2011 |
| 7948191 | Parallel transformer with output side electrical decoupling A higher power package is provided in a smaller package by providing at least first and second magnetics in parallel in first and second transformers. To limit degrading performance associated with circulating current between the two transformers, the transformers a... | 05/24/2011 |
| 7652436 | Methods and systems for illuminating household products Methods and systems for generating one or more scents in conjunction with light. Light of various colors, including dynamic lighting effects, may be generated such that at least one characteristic of the light may be based at least in part on one or more characteris... | 01/26/2010 |
| 7439688 | Discharge lamp lighting circuit with power control A discharge lamp lighting circuit includes an emission acceleration controller for detecting a voltage for a discharge lamp and for supplying power exceeding a rated value when the discharge lamp is initially lighted, and thereafter gradually reducing the power to s... | 10/21/2008 |
| 7429830 | Power control of a fluorescent lamp A fluorescent lamp (2), in particular a backlight lamp of a display device, is supplied with an alternating voltage, a frequency and an amplitude of which being greater during ignition than during normal operation of the lamp. The voltage (V) across the lamp ... | 09/30/2008 |
| 7385359 | Information systems An embodiment of this invention relates to an intelligent lighting device that can receive signals and change the illumination conditions as a result of the received signals. The lighting device can change hue, saturation, and brightness as a response to received si... | 06/10/2008 |
| 7382100 | Lighting control device having improved long fade off A lighting control device for controlling the light intensity level of at least one lamp is disclosed. The lighting control device includes an actuator and a controller operable to cause the light intensity level of the at least one lamp to fade at a first fade rate... | 06/03/2008 |
| 7332877 | Light controller A light controller capable of varying the brightness of a light emitting diode in a linear manner. The light controller may control a number of lights in a predetermined pattern or in a pattern designed by the user. A remote control may be used to control and intera... | 02/19/2008 |
| 7331681 | Lighting apparatus with adjustable lenses or filters A lighting apparatus comprises a light panel having a panel frame, and a plurality of LEDs or other light elements secured to the panel frame. Lenses and/or filters are adjusted in distance from the light elements, by for example moving the lenses/filters into diffe... | 02/19/2008 |
| 7323831 | Illumination device An illumination device has an illumination unit which glows when current flows through a load thereof, at least one instruction unit for instructing the illumination unit to glow, a PWM signal generating unit which generates a plurality of PWM signals based on that ... | 01/29/2008 |
| 7318652 | Versatile stand-mounted wide area lighting apparatus A lighting effects system comprises an arrangement of lamp elements, such as light-emitting diodes (LEDs) or other light elements, on a panel or frame. The panel or frame may be relatively lightweight, and may include one or more circuit boards for direct mounting o... | 01/15/2008 |
| 7317403 | LED light source for backlighting with integrated electronics An LED backlight structure for setting voltages and currents for LEDs. Red LEDs are connected in series between a first voltage regulator and a first controllable current source, green LEDs are connected in series between a second voltage regulator and a second cont... | 01/08/2008 |
| 7303300 | Methods and systems for illuminating household products Methods and systems are provided herein for illuminating a variety of household products and other items using color-controlled illumination systems that include lights under the control of processors. ... | 12/04/2007 |
| 7301290 | Brightness control device of light bulb module A brightness control device for a light bulb module utilizes a microcontroller equipped with a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit to maintain an even luminance of each light bulb in the light bulb m... | 11/27/2007 |
| 7301289 | Discharge lamp lighting control device The present discharge lamp lighting device is capable of rapidly breaking or restoring a lamp current or of rapidly reducing or restoring the lamp current. A discharge lamp lighting device, comprises a power supply circuit which supplies power to a discharge lamp, a... | 11/27/2007 |
| 7245228 | Portable electronic apparatus with controlled light sources A portable electronic apparatus has light sources that can be controlled to produce decorative or informational effects. Each light source is controlled by the combination of an enable signal from a 1-bit port of a controller and a PWM signal from a PWM signal from ... | 07/17/2007 |
