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| Number | Title | Issue Date |
| 8188670 | Light emitting device and method for driving light emitting device A light emitting device which can emit light of an arbitrary color temperature and a process for producing a light emitting device which can emit light of an arbitrary color temperature are provided. Such a light emitting device includes a first light emitting diode... | 05/29/2012 |
| 8134299 | LED control system using modulated signal An LED control system using a modulated signal includes a computer, a data storage unit, an AC power, a power conversion circuit, a control circuit, and an LED lamp string. The AC power is converted into a DC power by the power conversion circuit to supply a DC volt... | 03/13/2012 |
| 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 LED and a first Zener diode in parallel therewith, and a second group ... | 10/25/2011 |
| 8035306 | Device for setting luminosity of light-emitting diodes The invention concerns a circuit for setting all types of LED'S (7), mounted in series of five, their particular arrangements in series of five, powered by a direct voltage higher than 14 volts, using an LM 317 T regulator (1) and a potentiometer of 4.... | 10/11/2011 |
| 8022634 | Method and system for dimming AC-powered light emitting diode (LED) lighting systems using conventional incandescent dimmers A dimming control circuit for dimming light emitting diodes receives an AC input voltage signal from a dimming circuit. The control circuit includes a power stage and a current control loop coupled to the power stage. An AC detector is operable to detect an instanta... | 09/20/2011 |
| 8018170 | Light emitting diode driving module An LED driving module suitable to drive a plurality of LED strings in parallel connection is disclosed. The LED driving module includes a voltage converting apparatus, a conduction voltage detecting apparatus, a reference voltage generating apparatus and a current-a... | 09/13/2011 |
| 7847487 | LED lighting device Two LED arrays are connected in parallel, and the both ends of the parallel connection are connected to an alternating-current power supply AC. In each of the LED arrays, a capacitor and three LED blocks (the total of four components) are connected in series. In eac... | 12/07/2010 |
| 7675240 | Light emitting diode circuit having even current A light emitting diode (LED) circuit having even current has multiple LED strings, a current equalizing integrated circuit (IC) and a voltage compensation module. The LED strings are connected to an external power source, and each LED string has a power terminal and... | 03/09/2010 |
| 7423387 | Apparatus and method for controlling colour and colour temperature of light generated by a digitally controlled luminaire The present invention provides a method and apparatus for controlling the correlated colour temperature (CCT) or colour of light produced by an array of light-emitting elements by providing multiple selectable paths for the flow of drive current. The apparatus inclu... | 09/09/2008 |
| 7420335 | Switched constant current driving and control circuit The driving and control device provides a desired switched current to a load including two or more strings of one or more electronic devices. The device includes one or more voltage converters which convert the magnitude of the voltage from the power supply to anoth... | 09/02/2008 |
| 7408305 | Codable electronic circuit arrangement and method for producing it A codable electronic circuit arrangement, in particular an LED circuit arrangement (1), having a lead (3), via which electronic circuit elements (6) of the circuit arrangement, in particular LED components, can be driven by a drive circuit (2... | 08/05/2008 |
| 7408304 | Apparatus for power circuit of light emitting diode The invention is set for connecting L.E.D., bridging rectifier and AC/DC power transformer by using series connection method, also the main purpose is for saving energy and reducing the cost of electronic components. The first apparatus is built by first bridge rect... | 08/05/2008 |
| 7358706 | Power factor correction control methods and apparatus Power factor correction control methods and apparatus based on knowing in advance some information relating to anticipated load conditions (e.g., a desired power to be provided to a load). Based on “feeding-forward” known information about anticipated load condi... | 04/15/2008 |
| 7334917 | Illumination device An illumination device comprising at least four luminous units (1, 2), the light emitted by at least two of the four luminous units (1, 2) being suitable for being mixed to form white light. Moreover, an apparatus (3) for dimming at least one of... | 02/26/2008 |
| 7327586 | Power supply unit and lighting device for vehicle A power supply unit comprises: a voltage output section for supplying a voltage to a plurality of loads connected in parallel with each other; and a plurality of output side coils provided respectively corresponding to the plurality of loads, the plurality of output... | 02/05/2008 |
| 7264381 | Light emitting diode assembly using alternating current as the power source An LED assembly includes a first LED unit and a second LED unit, the latter is coupled electrically to the first LED unit in such a manner that each of the first and second LED units defines a current-flow direction in reverse order so that once Alternating Current ... | 09/04/2007 |
| 7256554 | 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 information from the load (i.e., without monitoring a load voltage an... | 08/14/2007 |
| 7235930 | Decorative tree with coordinated visual and sound effects A decorative tree uses a control circuit to operate multiple light strings and a speaker. Based on different types of music output by the speaker, the control circuit determines the light strings to be properly turned on or off. Therefore, the visual effects generat... | 06/26/2007 |
| 7233115 | LED-based lighting network power control methods and apparatus Multiple lighting apparatus coupled together to form a lighting network, in which operating power is efficiently provided throughout the network based on a distributed DC voltage or a distributed AC voltage. Based on various power driver configurations, each lightin... | 06/19/2007 |
| 7204623 | Bicycle lighting device A bicycle lighting device is configured to make possible the efficient illumination of an LED while controlling power loss between the generator and the LED. An LED unit has at least one LED. A protector circuit controls the flow of current to each LED according to ... | 04/17/2007 |
| 7152999 | Rope light having a multi-circuit arrangement A rope light having a multi-circuit arrangement is disclosed. The light comprises a plurality of electrical wires longitudinally extended therealong; and one or more pairs of first and second illuminating units, each pair being electrically coupled between any two e... | 12/26/2006 |
| 7138770 | LED driving circuit An LED driving circuit that is directly activated by an AC power supply is disclosed. A driving circuit has a first and second pair of opposite branches. The first pair of opposite branches operates in a positive half cycle of the AC power supply and the second pair... | 11/21/2006 |
| 7049757 | Series connected OLED structure and fabrication method A light emitting device comprises a plurality of organic light emitting diode (OLED) modules. The OLED modules are arranged into a series group where the individual OLED modules are electrically connected in series. The device is configured to be coupled to a power ... | 05/23/2006 |
| 7042165 | Driver circuit for LED vehicle lamp A first vehicle lamp driver circuit for a light emitting diode (LED) array, the LED array having a first string of four LEDs in series and a second string of four LEDs in series. A first LED driver drives the first LED string and a second LED driver drives the secon... | 05/09/2006 |
| 7038398 | Kinetic illumination system and methods The present invention relates to methods of creating eye-catching displays by taking advantage of color-changing illumination provided by LED systems disclosed herein. Displays can be made to appear to change color or to move simply by changing the color of the ligh... | 05/02/2006 |
| 7029145 | Low voltage decorative light string including power supply One or more strings of decorative lights are supplied with power by converting a standard residential electrical voltage to a low-voltage, and supplying the low-voltage to at least one pair of parallel conductors having multiple decorative lights connected to the co... | 04/18/2006 |
| 6930452 | Circuit arrangement In a circuit arrangement for driving a LED array comprising red, green and blue LEDs, a control loop is added for limiting the duty cycles of the control signals for driving the red, green and blue LEDs. In case one of the duty cycles reaches the limit value, the re... | 08/16/2005 |
| 6853150 | Light emitting diode driver A LED driver includes a high frequency inverter and an impedance circuit. The high frequency inverter operates to produce a high frequency voltage source whereby the impedance circuit directs a flow of alternating current through a LED array including one or more an... | 02/08/2005 |
| 6777889 | Light animation device The present invention concerns a light animation device comprising an animator and a light string A first bridge and a second bridge are connected in parallel between the common feed wire and the neutral wire. A forward and a reverse diode and a series of bulbs are ... | 08/17/2004 |
| 6580228 | Flexible substrate mounted solid-state light sources for use in line current lamp sockets A lamp using solid-state light emitting sources is configured to be used in a conventional socket. The lamp includes a flexible substrate on which are mounted a plurality of light emitting sources, such as light emitting diodes (LEDs) in spaced-apart arra... | 06/17/2003 |
| 6559605 | Synchronous multiple serial-lamps sets A synchronous multiple serial-lamps sets includes a plurality of serial or serial and parallel lamp sets; an IC set, an IC set auxiliary part, a power supply connector; and a signal transmission line. The leads connect the lamp sets, IC set, IC set auxili... | 05/06/2003 |
| 6392359 | System and method for reducing wavelength variations between light emitting diodes A system and method for reducing wavelength variations between light emitting diodes (LEDs) is provided that determines an emission wavelength of each of a plurality of LEDs at a common drive current, and drives each of the plurality of LEDs with a respec... | 05/21/2002 |
| 6344716 | Christmas light string An electrical circuit for use with plural, low voltage loads such as a string of Christmas lights is disclosed comprising groups of lights placed electrically in a series circuit but the lights within each group are in parallel, preferably with a semicond... | 02/05/2002 |
| 6288497 | Matrix structure based LED array for illumination A matrix structure-based light-emitting diode array includes a plurality of input resistances connected in parallel to one terminal of a current source, and a plurality of output resistances connected in parallel to another terminal of a current source. L... | 09/11/2001 |
| 6268702 | Lamp for an external warning light A LED lamp has a tubular metal body 1 having bayonet fitting lugs 2 and a central insulated contact 3 at its base. The top 4 of the body is angled and has a small metal plate 5 set in potting compound 6 arranged flush with the angled top 4. The plate 5 ha... | 07/31/2001 |
| 6072280 | Led light string employing series-parallel block coupling An LED light string employs a plurality of LEDs wired in a series-parallel block. Further, each series-parallel block may be coupled in parallel, the parallel connection coupled across a supply voltage through an electrical interface. LEDs of the light st... | 06/06/2000 |
| 6069452 | Circuit configuration for signal transmitters with light-emitting diodes A circuit configuration for emitting light signals in a road traffic systems. A plurality of LEDs for emitting colored light are supplied with an a.c. voltage. The LEDs are arranged in two groups of LEDs which are connected antiparallel to one another. Tw... | 05/30/2000 |
| 5495150 | Sequential, differential ignition of series operated arc lamps A series of arc lamps each has an inductor connected in series with its anode which is field-coupled to a similar inductor connected to its cathode, the inductors being connected in series with each other through the inductors between an arc lamp power su... | 02/27/1996 |
| 5150016 | LED light source with easily adjustable luminous energy An LED light source with readily adjustable luminous energy including LED chips is disclosed. A resistor device is provided in order to control the current flowing in LED chips for reducing variance of luminous energy. The resistor device includes a plura... | 09/22/1992 |
| 5012157 | Long-life luminaires There is provided a luminaire primarily for use with exit signs and other emergency-type lighting comprising a series string of low-voltage, extremely long-life bulbs positioned within an enclosure for protection and electrically connected to a standard b... | 04/30/1991 |
