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| Number | Title | Issue Date |
| 8058813 | Backlight unit and liquid crystal display device including the same A backlight unit of a liquid crystal display includes a lamp, a balancing pattern capacitor electrically connected to the lamp for current balance, a transformer electrically connected to the lamp via the balancing pattern capacitor, a sensing pattern capacitor elec... | 11/15/2011 |
| 7423385 | System and method for controlling voltage on discharge capacitors which control light energy from flash lamps A system and method are described for controlling voltage on discharge capacitors which control light energy from flash lamps, wherein the method includes measuring over time an operational behavior of a flash lamp for performing photothermolysis, wherein a discharg... | 09/09/2008 |
| 7372212 | Lamp, method of driving the lamp, backlight assembly and liquid crystal display device having the backlight assembly A lamp, a method of driving the lamp, a backlight assembly having the lamp, and a liquid crystal display (LCD) device having the backlight assembly are disclosed. The lamp includes a tube that contains gas and first through fourth electrodes. The first and second el... | 05/13/2008 |
| 7358682 | Discharge lamp lighting apparatus A discharge lamp lighting apparatus includes a transformer defining primary and secondary sides; a transformer driving circuit to drive the primary side of the transformer thereby lighting a discharge lamp connected at the secondary side of the transformer; a contro... | 04/15/2008 |
| 7312585 | Remote control of electronic light ballast and other devices An electronic ballast system controls one or more ballasts of HID or fluorescent lamps, which are controlled in an “on/off” manner by a ultra low power controller that is isolated for a primary power circuit or derives its very low switch power from the ballast ... | 12/25/2007 |
| 7227315 | Discharge lamp drive apparatus and liquid crystal display apparatus A discharge lamp drive apparatus includes: an inverter circuit; a transformer; a plurality of discharge lamp connection terminals; a plurality of ballast capacitors; a plurality of voltage detection circuits; and a signal processor. Each voltage detection circuit ha... | 06/05/2007 |
| 7221100 | Gas discharge lamp power supply An apparatus for providing power to a gas discharge lamp comprises a storage capacitor and an ignition switch coupled through a primarily parasitic first inductor to a parallel combination of a diode assembly and a second inductor in series with a gas discharge lamp... | 05/22/2007 |
| 7218059 | Discharge-lamp control device A discharge-lamp control device for lighting a discharge-lamp includes two electrodes, first and second driving units to supply power to the discharge-lamp through the electrodes, respectively. Each driving unit includes a transformer having primary and secondary co... | 05/15/2007 |
| 7180251 | Electronic power circuit for gas discharge lamps An input dc-voltage, usually obtained from an AC-mains voltage through a pre-connected rectifier and Power Factor Corrector, is converted by a series connection of two power transistors to an ac-voltage, which, via an LC section is presented to a gas discharge lamp.... | 02/20/2007 |
| 7170200 | Starter assembly for a gas discharge lamp The present invention comprises a unique starter assembly for a gas discharge lamp. The starter assembly comprises a main current path with a first leg connected to one electrode of a gas discharge lamp, and a second leg connected to a second electrode of the gas di... | 01/30/2007 |
| 7153178 | Method of manufacturing a lamp assembly A lamp assembly configured to inductively receive power from a primary coil. The lamp assembly includes a lamp circuit including a secondary and a lamp connected in series. In a first aspect, the lamp circuit includes a capacitor connected in series with the lamp an... | 12/26/2006 |
| 7141933 | Systems and methods for a transformer configuration for driving multiple gas discharge tubes in parallel An apparatus and methods for balancing current in multiple negative impedance gas discharge lamp loads. Embodiments advantageously include balancing transformer configurations that are relatively cost-effective, reliable, efficient, and good performing. Embodiments ... | 11/28/2006 |
| 7129651 | Remote control of electronic light ballast and other devices An electronic ballast system controls one or more ballasts of HID or fluorescent lamps, which are controlled in an “on/off” manner by a ultra low power controller that is isolated for a primary power circuit or derives its very low switch power from the ballast ... | 10/31/2006 |
| 7075249 | Arrangement in connection with a coupling device of a fluorescent lamp An arrangement in connection with a coupling device of a fluorescent lamp, the coupling device comprising a supply transformer, whose secondary is coupled in parallel with a fluorescent tube, the arrangement comprising an indicator circuit configured to indicate the... | 07/11/2006 |
| 7061183 | Zigzag topology for balancing current among paralleled gas discharge lamps An apparatus and methods for balancing current in multiple negative impedance gas discharge lamp loads. Embodiments advantageously include balancing transformer configurations that are relatively cost-effective, reliable, and efficient. Embodiments include configura... | 06/13/2006 |
| 7042327 | Alloy type thermal fuse and wire member for a thermal fuse element An alloy type thermal fuse is provided in which a ternary Sn—In—Bi alloy is used, the operating temperature belongs to the range of 130 to 170° C., the overload characteristic and the dielectric breakdown characteristic are excellent, the insulation stability a... | 05/09/2006 |
| 7019467 | Thermally-protected ballast for high-intensity-discharge lamps A ballast for electrical lighting fixtures with improved thermal protection features has ballast laminations, primary and secondary coils, and a thermal protector, the thermal protector being wired in series with the secondary coil. The ballast preferably is of the ... | 03/28/2006 |
| 6963264 | Alloy type thermal fuse and wire member for a thermal fuse element The invention relates to an alloy type thermal fuse and a wire member for a thermal fuse element, and provides an alloy type thermal fuse in which a fuse element does not contain a harmful metal, the operating temperature is about 150° C., the dispersion of the ope... | 11/08/2005 |
| 6958579 | Thermally-protected ballast for high-intensity-discharge lamps A ballast for electrical lighting fixtures has improved thermal protection features. The ballast has ballast laminations, primary and secondary coils, and a thermal protector, the thermal protector being wired in series with the secondary coil. When the ballast is o... | 10/25/2005 |
| 6949886 | Dynamic displays Gas discharge tube displays according to the present invention control power applied to the tubes using isolator/switches, which can be opto-isolators in combination with triacs, FET's or other semiconductor switching devices or devices which can form part of a swit... | 09/27/2005 |
| 6917163 | Inductively powered lamp assembly A lamp assembly configured to inductively receive power from a primary coil. The inductively powered lamp assembly includes a lamp circuit including a secondary and a lamp connected in series. In a first aspect, the lamp circuit includes a capacitor connected in ser... | 07/12/2005 |
| 6724155 | Lamp ignition circuit for lamp driven voltage transformation and ballasting system A lamp ignition circuit is provided which can initiate operation of a gas discharge lamp using a driving voltage which is similar in magnitude to the lamp operating voltage. The lamp ignition circuit is useful with a semi-resonant ballast and lamp circuit in which s... | 04/20/2004 |
| 6661181 | Backlight assembly and liquid crystal display device having the same A connection of electrode lines of lamps for supplying a light source for a backlight assembly of a liquid crystal display (LCD) device is improved to minimize the size of the LCD device while reducing the manufacturing cost. The LCD device includes the b... | 12/09/2003 |
| 6657404 | Method and apparatus for power control A method and apparatus is disclosed to reduce power consumption of a load. In one embodiment a power control system selectively routes power directly to a load or to a power reduction device. A delay may occur prior to introduction of the power reduction ... | 12/02/2003 |
| 6611223 | Method and apparatus for ultra wide-band communication system using multiple detectors A method and apparatus for detecting ultra wide-band (UWB) signals using multiple detectors having dynamic transfer characteristics. A receiver circuit is implemented using devices such as op-amps to provide the required dynamic characteristics. Detectors... | 08/26/2003 |
| 6448950 | Energy efficient resonant switching electroluminescent display driver A driving circuit for powering an electroluminescent display using energy recovered from a varying panel capacitance of the display. The driving circuit comprises a source of electrical energy; and a resonant circuit using the panel capacitance for receiv... | 09/10/2002 |
| 6242869 | Fluorescent lamp stabilizer harmonics reduction method A method for reducing the harmonics created by rapid-start fluorescent lamp stabilizer balance systems is accomplished by increasing the number of turns of the secondary winding of the transformer so as to decrease the secondary current to approximately 4... | 06/05/2001 |
| 6104147 | Pulse generator and discharge lamp lighting device using same A pulse generator for a stable output pulse voltage obtains a high voltage pulse with a charge accumulated in a capacitor and discharged at a discharge gap made ON, wherein a pulse energy source and a trigger source for conduction of the discharge gap are... | 08/15/2000 |
| 6057650 | Input circuit for the starter of a high-pressure gas-filled discharge lamp A high-pressure gas discharge lamp is connected on one side to a lead across the secondary winding of a starter transformer and to a second lead on the second side. Starting energy is applied with a pulse. For this purpose, a controllable switch which bec... | 05/02/2000 |
| 5892336 | Circuit for energizing cold-cathode fluorescent lamps An electrical circuit for simultaneously energizing at least a pair of CCFLs that are connected in series. The circuit also includes a transformer having a primary winding adapted to receive an alternating current. A secondary winding is coupled in series... | 04/06/1999 |
| 5814948 | Flash circuit for low cost cameras A flash circuit for a low cost camera in which a voltage dependent resistor is employed as a flash capacitor charge voltage sensing device to perform a control effect in the flash circuit, such as turning on a flash ready indicator light or activating a o... | 09/29/1998 |
| 5770923 | Power supply for an electroluminescent panel or the like The present invention discloses an electroluminescent panel and a power supply circuit for applying voltages of alternating current to the electroluminescent panel. The power supply circuit is comprised of a voltage converter, an electric power source, a ... | 06/23/1998 |
| 5751116 | Apparatus to retrofit an HID light fixture An apparatus for retrofitting an HID light fixture is described in several embodiments. The apparatus is coupled in series with the secondary winding and the HID lamp of the HID light fixture. A first retrofit capacitor replaces the light fixture capacito... | 05/12/1998 |
| 5594305 | Power supply for use with switched anode field emission display including energy recovery apparatus A switching power supply 38 for use in a switched anode, field emission flat panel display includes energy recovery modules 48R, 48G and 48B for recovering energy from each anode electrode 50R, 50G an... | 01/14/1997 |
| 5574337 | Single touch flash charger control An electronic flash device including a self-oscillating charging circuit, a momentary trigger for initiating oscillations of the circuit to charge a flash capacitor, and a voltage sensing device coupled directly between the circuit and the flash capacitor... | 11/12/1996 |
| 5568016 | Power supply for an electroluminescent panel or the like The present invention discloses an electroluminescent panel and a power supply circuit for applying voltages of alternating current to the electroluminescent panel. The power supply circuit is comprised of a voltage converter, an electric power source, a ... | 10/22/1996 |
| 5510680 | Electronic ballast with special voltage waveforms An inverter-type electronic ballast for a gas discharge lamp is powered by a DC supply voltage provided from a rectifier-filter combination connected with an ordinary electric utility power line. The absolute magnitude of the DC supply voltage is higher t... | 04/23/1996 |
| 5504399 | Electrical circuit for operating a fluorescent lamp and for measuring the lamp current In an electrical circuit for feeding a fluorescent lamp, a serial resonant circuit is comprised of a first coil of a feedback-transformer, a resonant inductor, a coupling condenser, a first lamp cathode, a resonant condenser, and a first coil of an isolat... | 04/02/1996 |
| 5424615 | Discharge lamp ballast operating on induced voltage in the primary winding of a boosting transformer An electronic ballast circuit for discharge lamps, comprising a boosting transformer for applying a high voltage as a discharging voltage to the discharging lamps, the high voltage being induced in a main secondary winding of the transformer according to ... | 06/13/1995 |
| 5412286 | Variable voltage ballast system for mini-fluorescent lamp An efficient ballast for Mini-fluorescent lamps, includes an inductor, in communication with a power source and constructed as transformer with only primary winding, a fluorescent lamp in series with the inductor, and a capacitor in series with the fluore... | 05/02/1995 |
