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| Number | Title | Issue Date |
| 8008864 | Single LED string lighting A solid state lighting unit constituted of: a control circuitry; a single string of light emitting diodes, the single string constituted of a plurality of sections each comprising a plurality of light emitting diodes; and a plurality of bypass paths each responsive ... | 08/30/2011 |
| 7994725 | Floating switch controlling LED array segment A control circuit used in a lamp system. The lamp system has a first and a second light emitting diode (LED) connected together in series. The control circuit includes a current source for connecting to the first LED to provide a regulated drive current to the first... | 08/09/2011 |
| 7635954 | Configuration and method for the manufacture of a failsafe LED or OLED chain A structural configuration of a failsafe OLED chain with multiple OLED lighting components in series connection is described. During the manufacture of the lighting component a weak spot is specifically installed at an appropriate location of the structure in the fo... | 12/22/2009 |
| 7391161 | Series wired light string with unidirectional shunts A series-connected string of light bulbs, operating on AC voltage, each having connected thereacross a voltage regulating shunting circuit which regulates the voltage across an empty or otherwise inoperative socket so as to maintain unidirectional current across eac... | 06/24/2008 |
| 7375476 | Lighting device having a circuit including a plurality of light emitting diodes, and methods of controlling and calibrating lighting devices A lighting device (132) includes a circuit having a power supply and a plurality of light emitting diodes (120) connected in series with the power supply. The plurality of light emitting diodes (120) includes at least two groups of series-connec... | 05/20/2008 |
| 7339325 | Series wired light string with unidirectional resistive shunts A string set of series-connected incandescent bulbs in which substantially all of the bulb filaments in the set are individually provided with a shunt circuit which includes a voltage responsive switch which is inoperative during normal operation of the string set w... | 03/04/2008 |
| 7339323 | Serial powering of an LED string A circuit is used for driving a plurality of LEDs by an external voltage source. The LEDs are coupled in series. The circuit comprises a plurality of switches coupled to the LEDs in parallel, respectively, for individually controlling the brightness of the LEDs. The... | 03/04/2008 |
| 7309152 | Light source structure of backlight module A light source structure of a backlight module comprises: a bar-shaped light source; and a group of complementary color light emitting diodes mounted at both ends of the bar-shaped light source. The bar-shaped light source is composed of several light emitting diode... | 12/18/2007 |
| 7279809 | Christmas light string with single Zener shunts A string set of series-connected incandescent bulbs in which substantially all of the bulb filaments in the set are individually provided with a shunt circuit which includes a voltage responsive switch which is inoperative during normal operation of the string set w... | 10/09/2007 |
| 7261458 | Semiconductor chip with container and contact elements for use in a light socket A shunt device for use in a light socket includes a first semiconductor chip and a first container having a receiving surface for receiving the first semiconductor chip therein and having an open surface through which the first semiconductor chip is exposed and a fi... | 08/28/2007 |
| 7242148 | Continuous current control circuit modules of series string bulbs type (II) The invention relates to a continuous current control circuit module of series string bulbs type (II), which can maintain the normal current and voltage across each of the bulbs when any of series connected bulbs burn out. The string includes a shunt in every bulb a... | 07/10/2007 |
| 7239087 | Method and apparatus to drive LED arrays using time sharing technique An efficient and flexible current-mode driver delivers power to one or more light sources in a backlight system. In one application, the current-mode driver is configured as an inverter with an input current regulator, a non-resonant polarity-switching network, and ... | 07/03/2007 |
| 7227314 | Voltage equalization method and apparatus for low-voltage lighting systems A method and apparatus to equalize the voltage across each light bulb in a low-voltage lighting system, commonly found in the yards of private homes and businesses. The present invention consists of a power compensation element that is inserted in-line with each lig... | 06/05/2007 |
| 7224150 | Redundancy circuit for series-connected diodes A redundancy circuit for a diode circuit composed of a plurality of diodes connected in series, according to the present invention, includes: bypass circuits, each of which is connected in parallel to each group, the diode circuit being divided into a plurality of g... | 05/29/2007 |
| 7220040 | LED light engine for backlighting a liquid crystal display An edge-lit backlighting system for liquid crystal displays employs a number of light strips in the form of thin, light weight sections of a thermally conductive substrate each of which mounts a plurality of light engines having an array of densely packed, primary c... | 05/22/2007 |
| 7178961 | Voltage regulated light string A string set of series-connected incandescent flasher type lamps in which substantially all of the lamp filaments in the set are individually provided with a voltage regulated shunt circuit, which includes a voltage responsive silicon semiconductor device, which ope... | 02/20/2007 |
| 7166968 | DC series connected light string with diode array shunt A series-connected string of incandescent light bulbs, operating on half-wave or full-wave rectified DC voltage, each having connected thereacross a filament voltage regulating shunting circuit which regulates the voltage across an empty or otherwise inoperative soc... | 01/23/2007 |
| 7157859 | Lighting device and lighting system First resistors (R1, R2) for setting a forward current value are connected in series to light-emitting diodes (LED 1, LED 2) respectively to constitute first serial circuits (112, 113), which are connected to an input terminal (... | 01/02/2007 |
| 7086758 | Series connected light string with filament shunting A string set of series-connected incandescent bulbs in which substantially all of the bulb filaments in the set are individually provided with a shunt circuit which includes a voltage responsive switch which is inoperative during normal operation of the string set w... | 08/08/2006 |
| 7088904 | Light emitting module A light-emitting module structurally suspended between a pair of spaced apart electrical conducting wires wherein each of the wires has selected portions that are electrically insulated from the module. The light emitting module, in concert with the electrical condu... | 08/08/2006 |
| 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 |
| 6929383 | Semiconductor chip and conductive member for use in a light socket A shunt device for a light socket includes a semiconductor chip which is operably interposed between a pair of electric terminals of the socket. The sockets are in series for a conventional set of display lights, such as holiday lights. ... | 08/16/2005 |
| 6882111 | Strip lighting system incorporating light emitting devices The invention provides an elongated lighting apparatus that can withstand temperature fluctuations. The elongated lighting apparatus comprises of the following elements: at least two elongated tubular members fabricated from translucent material. These elongated tub... | 04/19/2005 |
| 6765313 | Series connected light string with filament shunting A string set of series-connected incandescent bulbs in which substantially all of the bulb filaments in the set are individually provided with a shunt circuit which includes a voltage responsive switch which is inoperative during normal operation of the string set w... | 07/20/2004 |
| 6650065 | Decorative bulb unit with filament shunt mounted in bulb socket thereof A light string includes electrical wires to which a number of bulb sockets are connected in series. Each bulb socket defines a receptacle for receiving and retaining a bulb with the bulb in electrical connection with the electrical wires. A shunt member m... | 11/18/2003 |
| 6597125 | Voltage regulated light string A string set of series-connected incandescent flasher type lamps in which substantially all of the lamp filaments in the set are individually provided with a voltage regulated shunt circuit, which includes a voltage responsive silicon semiconductor device... | 07/22/2003 |
| 6580182 | Series connected light string with filament shunting A string set of series-connected incandescent bulbs in which substantially all of the bulb filaments in the set are individually provided with a shunt circuit which includes a voltage responsive switch which is inoperative during normal operation of the s... | 06/17/2003 |
| 6392553 | Signal interface module An apparatus and method are provided for interfacing railway controllers with light units, such as LED light unit arrays, to shunt and/or disable test signals not traditionally intended to test non-incandescent light unit arrays.... | 05/21/2002 |
| 6084357 | Series connected light string with filament shunting A string set of series-connected incandescent bulbs adapted to being connected to a source of alternating-current operating potential and in which all of the bulb filaments in the set are individually provided with a non-avalanche shunt circuit which subs... | 07/04/2000 |
| 5962929 | Fault tolerant power distribution A power distribution system in which the loads are connected in series to a current source. At each load, a current source to voltage source convertor provides alternative current paths. A serial power distribution current path includes a modulated switch... | 10/05/1999 |
| 5886423 | Electric series circuit An electric series circuit with plural loads such as light bulbs connected in series and plural solid state switching devices, with each switching device connected in parallel with one of the loads. Each switching device conducts current when the load tha... | 03/23/1999 |
| 5751523 | Secondary ground fault protected luminous tube transformer for mid-point connected luminous tubes A low cost power supply for neon lamps provides enhanced safety protection. The power supply has a transformer with a return path which is separate from the earth ground so that a fault current can be detected. The power supply has a mid-point connected s... | 05/12/1998 |
| 5528147 | Apparatus for detecting gas discharge lamp faults A capacitor (16) coupled in series with series coupled gas discharge lamps (11 and 12) will effectively block direct current from flowing through the capacitor (16). A detector circuit including a high impedance resistor (17) and transistor (18) provide a... | 06/18/1996 |
| 5436529 | Control and protection circuit for electronic ballast A series-resonant ballast for powering at least one gas discharge lamp (16) having heatable filaments (12,15) includes: DC voltage input terminals (B+,B-); an oscillating resonant converter (55,26,51,52,53) for producing high frequency voltage for applica... | 07/25/1995 |
| 5397963 | Subsystem and method for detecting lamp failure A dual mode high intensity aircraft approach lighting system includes a plurality of lights interconnected by means of power wiring. An improved subsystem for detecting lamp failures is disclosed which permits a positive identification of individual faile... | 03/14/1995 |
| 5363017 | Starting capacitor disconnect scheme for a fluorescent lamp A starting capacitor disconnect scheme for a fluorescent lamp system in which each starting capacitor shunts one or more series connected fluorescent lamps until all of the fluorescent lamps are ignited. Following ignition of all fluorescent lamps, each s... | 11/08/1994 |
| 5081401 | Driver circuit for a plurality of gas discharge lamps A circuit (100) for driving a plurality of gas discharge lamps (102, 104), and having: input terminals (126, 130) for connection to a source of voltage supply; output terminals (134, 136, 140) for connection to the lamps in series; an oscillator (124, 132... | 01/14/1992 |
| 5032961 | Ground light system for a landing strip A ground light or beaconing system for a landing strip having at least one loop of lamps connected in series. Said loop is supplied by a solar cell, via a regulating circuit ensuring the preheating of the lamps while also maintaining a current flowing in ... | 07/16/1991 |
| 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 |
| 4912371 | Power saving fluorescent lamp substitute An improved non-lighting fluorescent lamp substitute to replace one lamp in a two-lamp series connected circuit so that the circuit is completed through the remaining lamp allowing it to light, whereas without the lamp substitute, the circuit is incomplet... | 03/27/1990 |
