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8179055 LED circuits and assemblies  
An AC-driven LED circuit 10 includes a first parallel circuit 12 having a first branch 14 and a second branch 16 which connect at first and second common point 18, 20. The common points 18, 20...
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...
8159454 LED string driver with shift register and level shifter  
The present invention relates to a device for individually driving OLED/LED elements of an OLED/LED string, comprising for each OLED/LED element of the string: a controllable shunting switch (22,...
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...
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...
8154214 Switching power supply for an illumination device with precision current control  
A system and method for powering a light-emitting element in an illumination device includes a DC power supply with the light-emitting element coupled across a positive output terminal and a...
8148910 ***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Differential driving circuit for powering a light source  
A differential driving circuit for powering a light source is disclosed. The differential driving circuit includes a first set of switches and a second set of switches. A first current from a power...
8143807 Color temperature controller and color temperature control method of light emitting diode  
This invention discloses a color temperature controller and a color temperature control method of a light emitting diode (LED). The color temperature controller applied in an LED lamp includes...
8138680 Light string with external resistor unit  
An LED light string including a first loop, which further includes a first plurality of LEDs in series successively connected by first connecting wires, and at least one first resistor connected to...
8134298 Decorative light string device  
The present invention discloses a decorative light string device, which comprises: a power plug receiving AC power, a tail socket coupled to the power plug, and a LED string with one end thereof...
8134305 Light source driving apparatus  
A light source driving apparatus for sequentially driving a plurality or light sources is provided. The light source driving apparatus includes a light source power supply for supplying a power...
8115414 LED driver with segmented dynamic headroom control  
Techniques for dynamic headroom control in a light emitting diode (LED) system are disclosed. An output voltage is provided to drive a plurality of LED strings. A feedback controller monitors the...
8115411 LED lighting system  
A light emitting diode lighting device and system that can be used for illuminating the interior and/or exterior of vehicles, aircraft, watercraft, signage or buildings is provided. It includes a...
8115536 Self-oscillating switch circuit for use in a switching DC-DC converter  
A self-oscillating switch circuit for amplitude modulation dimming for dimming a LED load. The self-oscillating switch circuit comprises a high-power input terminal (S2) for supplying a first power...
8106604 LED driver with dynamic power management  
A light emitting diode (LED) system implements a LED driver to drive a set of one or more LED strings. The LED driver includes a voltage source to provide an adjustable output voltage to a head end...
8106597 High efficiency boost LED driver with output  
A current driver for powering a string of LEDs has a boost converter coupled to an input voltage source. A voltage multiplier circuit is coupled to the boost converter and to the string of LEDs. A...
8100550 Method and system for controlling light fixtures  
A system and method for controlling a plurality of light fixtures to create light and music, including a processor having a memory. Software is loaded in the memory and is executable by the...
8098025 LED flash bulb decorating light  
A LED flash bulb decorating light with features of able to achieve complicated light variation by employing simple circuit design, which comprises a power cord with a power plug, a series of single...
8093819 Flashing light string  
A light string includes a load comprising a trigger LED assembly and a lighting assembly connected in series with the trigger LED assembly, the lighting assembly comprising a plurality of series...
8076856 LED lamp  
An LED lamp includes an optical part, a heat dissipation part and an electric part. The optical part includes main and auxiliary LED light sources thermally attached to the heat dissipation part....
8076859 Emergency sign power supply with battery charger  
An emergency sign power supply with battery charger is provided. In some embodiments the battery charging circuit is formed by a single diode and a single resistor.
8072152 Limited flicker light emitting diode string  
A limited flicker decorative light-emitting diode (LED) string includes a power plug adapted to connect to an alternating current (AC) power source and supply AC power to the LED string, a first...
8067896 Digitally controlled current regulator for high power solid state lighting  
An exemplary apparatus embodiment provides for controlling current supplied to solid state lighting, such as light emitting diodes. An exemplary apparatus comprises a memory adapted to store a...
8053995 LED light string without additional resistors  
An electrical circuit for use as a string of lights in one embodiment includes a rectifier for converting AC into DC; and a plurality of lamps connected in series, each lamp having an LED, and...
8044599 Light string with alternate LED lamps and incandescent lamps  
In one embodiment an electrical circuit for use as a string of lights includes a load comprising a plurality of lamps connected in series, the lamps comprising a first group of lamps including an...
8040072 Power supply and plasma display including the same  
A power supply including a transformer primary coil coupled to an input power source and a secondary coil coupled to an output terminal, a first switch coupled to the primary coil of the...
8026675 Light emitting diode driving circuit and light emitting diode array device  
There is provided an LED driving circuit including: at least one ladder network circuit including: (n+1) number of first branches connected in parallel with one another by n number of first middle...
8018409 Maximizing efficiency of battery-powered LED drivers  
An apparatus and method is provided for optimizing LED driver efficiency. The present invention offers low cost solutions for powering LEDs while minimizing overall power dissipation in devices...
8007129 LED-based christmas light string assembly with parallel-wired lighting units  
An LED light string assembly has a plug for providing a low DC voltage, an extension socket, a light string connected between the plug and the extension socket. The light string has multiple LED...
8004204 Power circuit and illumination apparatus  
A series load circuit is a circuit formed by connecting a light-emitting device unit 851 (the first load circuit) and a light-emitting device unit 852 (the second load circuit) in series. A voltage...
8004214 Fluorescent tube power supply and backlight  
A fluorescent tube power supply including a rectification circuit, a smoothing circuit, an inverter, and a control circuit for controlling the inverter, further includes a current detecting unit...
8004207 LED driver with precharge and track/hold  
A power source provides an output voltage to drive a plurality of light emitting diode (LED) strings. A feedback controller monitors the tail voltages of the LED strings to identify the minimum...
8004203 Electronic light generating element with power circuit  
The present system for driving an electronic light generating element, includes: (i) input terminals, (ii) an input circuit coupled to the input terminals and operable to convert a sinusoidal...
7999484 Method and apparatus for controlling current supplied to electronic devices  
The present invention provides a drive and control apparatus provides a desired switched current to a load including a string of one or more electronic devices. A voltage conversion means, based on...
7999485 Electrical device  
The present invention is directed to a power control wiring device that includes an electronic switch circuit that energizes the electrical load in accordance with a timing regulation signal. A...
7993021 Multiple color lighting element cluster tiles for solid state lighting panels  
A solid state lighting tile includes a substrate and a plurality of lighting element clusters on a surface of the substrate. Respective ones of the plurality of lighting element clusters include...
7990078 Lighting control system having a trim circuit  
A lighting control system suitable for a surgical lighting device. The lighting control system includes circuitry that compensates for the effects of temperature changes in a lighting device, and...
7986100 LED string  
A light-emitting diode (LED) string is provided. The LED string includes a power plug configured for connecting with a power source to power the LED string; one or more LED sockets configured for...
7977890 Direct current power supply device, power supply device for driving LED and semiconductor integrated circuit for controlling power supply  
Disclosed is a direct-current power supply device, including: an inductor; a switching element to intermittently supply a current to the inductor; an external terminal to which an output current of...
7977889 Direct-current power supply device, power supply device for driving LED and semiconductor integrated circuit for driving power supply  
Disclosed is a direct-current power supply device, including: an inductor; a switching element to intermittently supply a current to the inductor; an output terminal connected to an external unit;...
7973486 Intelligent decorative displays with ambient electromagnetic field switching  
A system and method of controlling self powered decorative devices using EMF emanating from, for example, a light string on a Christmas tree. The decorative devices sense the presence of EMF from...
7952297 Driving device for providing light dimming control of light-emitting element  
A driving device includes a first switch element to switch between applying or not applying to a light-emitting element a voltage directed to setting the light-emitting element in an ON state, and...
7948188 Light emitting diode illuminating apparatus with adjustable luminance  
A light emitting diode (LED) illuminating apparatus (100) includes a controller (20) and an illuminating member (10). The controller is configured for setting a luminance of the LED illuminating...
7928667 Synchronous light emitting diode lamp string controller  
The present invention discloses a synchronous LED lamp string controller, comprising a clock synchronous circuit to receive a reference signal with a constant frequency, and based on which, to...
7911151 Single driver for multiple light emitting diodes  
A LED driver circuit (70, 80) employs a power source (IS, VS) for providing power at a power conversion frequency to a switching LED cell (30-32, 40-42). The switching LED cell (30-32, 40-42)...
7906915 Enhanced trim resolution voltage-controlled dimming LED driving circuit  
Each driver circuit for a six-by-four array of light emitting diodes illuminating a pushbutton switch switches three pairs of the light emitting diodes between series connection and parallel...
7902768 Driving arrangement for feeding a current with a plurality of LED cells  
A driving arrangement for feeding a current generated by a high frequency generator (10) coupled with a magnetic element (11) to a plurality of LED cells (33) each including at least one LED. The...
7898187 Circuit and method for average-current regulation of light emitting diodes  
A regulator regulates one or more light emitting diodes (LEDs) so as to control an average current through the LEDs. The regulator could include a transistor switch that can couple the LEDs to...
7898188 Arrangement provided with a voltage converter for supplying voltage to an electrical charge and associated method  
A method includes a voltage converter outputting an output voltage that is based on an input voltage and on a first multiplication factor, determining a predicted current sink voltage based on a...
7893627 Light strands  
The Light strands include at least two light strands connected in series. Each light strand includes a plurality of LED (Light Emitting Diode) lights connected in series, a plurality of two-hole...
Matches 1 - 50 out of 252 1 2 3 4 5 6 >