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"Everyone acquainted with the subject will recognize it as a conspicuous failure."
Henry Morton, president of the Stevens Institute of Technology ; Said in 1880 about the light bulb
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| Number | Title | Issue Date |
| 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. ... | 12/13/2011 |
| 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 the light string and actuate in response thereto and turn off when the... | 07/05/2011 |
| 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 connection based on changes to an applied input voltage. Driving six light ... | 03/15/2011 |
| 7863825 | LED driver circuit for providing desired luminance with constant current An LED driver circuit that sinks pure DC current through LEDs. According to the invention, a constant current sink circuit is coupled to a full bridge rectifier. The full bridge rectifier includes at least a first bridge arm, a second bridge arm, a third bridge arm ... | 01/04/2011 |
| 7852009 | Lighting device circuit with series-connected solid state light emitters and current regulator A circuit for a lighting device comprises a sub-circuit which comprises a series current regulator and a group of solid state light emitters. The current regulator and the solid state light emitters are arranged in series. In some embodiments, the circuit further co... | 12/14/2010 |
| 7781979 | Methods and apparatus for controlling series-connected LEDs Methods and apparatus for controlling series-connected LEDs. Two or more LEDs are connected in series between a first node and a second node, wherein a series current flows between the nodes when an operating voltage is applied across the nodes. One or more controll... | 08/24/2010 |
| 7705542 | Flashlight A flashlight in accordance with an aspect of the invention includes an ID module for generating an ID signal indicative of a power mode of the flashlight. In an aspect, the flashlight mates with a removable battery pack that regulates at least one of an output volta... | 04/27/2010 |
| 7649322 | 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 pair of LEDs and a second pair of LEDs, a plurality of LEDs electricall... | 01/19/2010 |
| 7642725 | Unbalanced plural string LED driver with common return resistor The present disclosure describes systems and methods for driving light emitting diodes (LEDs). At least some embodiments include an LED driver system that includes a power supply, a plurality of current sources (each current source coupled between a common return re... | 01/05/2010 |
| 7576497 | Synchronous light emitting diode lamp string The present invention provides a light emitting diode lamp, which includes at least a light emitting diode and a control circuit. The light emitting diode lamp has an anode pin, a cathode pin, and a synchronous pin. The anode pin and the cathode pin receive a DC vol... | 08/18/2009 |
| 7576496 | AC powered OLED device AC powered 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... | 08/18/2009 |
| 7508141 | Modular decorative light system A sculptable, decorative light system includes a number of modules of differing lengths which can respond to commands either in parallel or time delay to create pre-selected light colors and sequences. Three miniature connectors are used to create a direct current f... | 03/24/2009 |
| 7479738 | Drive circuit for light emitting diode A drive circuit for light emitting diode (LED) is provided, which is used to drive a plurality of LEDs to emit light. The LEDs are connected in series into a plurality of LED strings. The drive circuit includes a power converter, a detection circuit, and a report ci... | 01/20/2009 |
| 7439944 | Light emitting diode multiphase driver circuit and method A method and a circuit for driving light emitting diodes (LEDs) in multiphase are provided. A string of LEDs divided into groups connected to each other in series is provided. Each group is coupled to ground through separate conductive paths. A phase switch is provi... | 10/21/2008 |
| 7420332 | LED lighting device A first LED array including a first capacitor, LED blocks, and a second capacitor that are connected in series with each other, a second LED array having a similar configuration to the first LED array, and a third LED array having a similar configuration to the firs... | 09/02/2008 |
| 7364322 | Appliance convenience light A lighting apparatus includes multiple point light sources housed in a reflector housing. The reflector housing diffuses the light produced by the point light sources to emulate a linear light source. Power supplies are provided to energize the light sources, to con... | 04/29/2008 |
| 7360917 | Lamp holder with a securing stake A lamp holder with a securing stake is disclosed, comprising a power input line provided with a plug; a main body provided with an accommodating space whose front end is provided with an opening, whose back end is provided with an power line opening for the passing ... | 04/22/2008 |
| 7362057 | Multi-way flashing control box for lamp strings A circuit board of a multi-way flashing control box includes a control circuit to be connected electrically to a plurality of LED lamp strings and operable to activate and deactivate the LED lamp strings, and a plurality of connecting units, each of which is for con... | 04/22/2008 |
| 7360934 | Light supply unit, illumination unit, and illumination system A light supply unit comprises optical fibers, LEDs, optical connectors, and a controller. The optical fibers constitute optical fiber groups which extend to their respective illumination positions different from each other. The optical connectors optically connect o... | 04/22/2008 |
| 7354174 | Energy efficient festive lamp The present invention relates to a novel energy saving decorative festive lamp that is ideally suited for use in clubs, restaurants, or decorative applications, where specialized lighting, such as rapid flashing or frequent starts, is required. It may be used with h... | 04/08/2008 |
| 7348738 | OLED area illumination source The present invention relates to an area illumination light source comprising a plurality of individual OLED panels. The individual OLED panels are configured in a physically modular fashion. Each OLED panel comprising a plurality of OLED devices. Each OLED panel co... | 03/25/2008 |
| 7342327 | 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... | 03/11/2008 |
| 7331688 | Synchronous light emitting diode lamp string The present invention provides a light emitting diode lamp, which includes at least a light emitting diode and a control circuit. The light emitting diode lamp has an anode pin, a cathode pin, and a synchronous pin. The anode pin and the cathode pin receive a DC vol... | 02/19/2008 |
| 7318661 | Universal light emitting illumination device and method Disclosed is a method and apparatus for providing a light emitting diode and driving circuitry integrated into a component module that will retrofit common incandescent lightbulb applications. The disclosed embodiments will perform with high efficiency at a wide ope... | 01/15/2008 |
| 7311558 | Receptacle and plug therefor An electrical receptacle defines a receptacle formation of a mating formation pair to prevent a standard plug from establishing electrical connection while permitting an otherwise standard plug defining a corresponding plug formation to be sufficiently inserted to e... | 12/25/2007 |
| 7301287 | High power light string device A high power light string device comprises a plug with a plug blade set, a tail receptacle, and at least an LED string, wherein a first power adaptor disposed in the plug converts an AC voltage through the plug blade set to a high DC voltage, and a second power adap... | 11/27/2007 |
| 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 |
| 7276911 | Detection of malfunctioning bulbs in decorative light strings A system for locating a malfunctioning bulb in a decorative light string uses an antenna that produces an output signal corresponding to the strength of the electric field produced by a portion of the light string near the antenna. An amplifier is coupled to the ant... | 10/02/2007 |
| 7276858 | Decorative lighting string with stacked rectification An improved decorative light string circuit comprises full bridge rectification located in or downstream of the front plug, wherein the rectification circuit contains one or more voltage reducing and/or filtering elements in order to reduce or limit LED drive curren... | 10/02/2007 |
| 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 |
| 7265496 | Junction circuit for LED lighting chain An LED light string where the parallel connections of additional series blocks of LED lamps are added through an intermediate or junction circuit. The first half of the rectifying diode pair in the junction circuit receive the series connected LED lamps positive con... | 09/04/2007 |
| 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 |
| 7250730 | Unique lighting string rectification An improved decorative light string circuit comprises full bridge rectification located in or downstream of the front plug, wherein the rectification circuit contains one or more voltage reducing and/or filtering elements in order to reduce or limit LED drive curren... | 07/31/2007 |
| 7247076 | Pulse width modulation drive and method for ornaments with movable components A decoration device may include a low-friction drive line and a PWM controlled motor that reduces or eliminates the gearing needed to achieve appropriate speed and torque at the motor output shaft. In preferred embodiments, the decoration device is an ornament that ... | 07/24/2007 |
| 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 |
| 7238037 | Electronic module with elastic connector An elastic computer connector is described. The elastic computer connector utilizes an elastic device to couple the elastic computer connector to a corresponding computer connector with a predetermined contact force so as to eliminate a poor contact problem. The ela... | 07/03/2007 |
| 7237935 | Light source module and vehicular lamp A vehicular lamp has a plurality of light source modules for emitting light. Each of the light source modules has a semiconductor light-emitting element, a lighting circuit operable to control an electric current flowing into the semiconductor light-emitting element... | 07/03/2007 |
| 7234839 | Lighting device for festival decoration A lighting device for festival decoration comprises a plurality of decorative lamp blocks wired in series successively, each block having a two-row lamp fixture; a lamplight controller and a knob switch for regulating lamplights electrically coupled with the wired d... | 06/26/2007 |
| 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 |
| 7230392 | Analog control of light sources Analog control of a plurality of light sources, such as light-emitting diodes (LEDs), to generate multiple colors of light. An electronic circuit controls three or more analog outputs in response to a single analog input, each of the analog outputs controlling a dif... | 06/12/2007 |
