| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 315277000 | Plural transformers in the supply circuit | 12 |
| 20080211424 | MULTI-DISCHARGE TUBE LIGHTING APPARATUS - A multi-discharge tube lighting apparatus connectable to a power source comprising a first output terminal and a second output terminal respectively outputting voltages of opposite phases, the lighting apparatus comprises first to n-th discharge tube units where n represents an integer of two or more, each of which has a first end connected to the first output terminal and a second end connected to the second output terminal and comprises at least one discharge tube, a first winding, and a second winding, which are connected in series between a first end and a second end. The first winding of the first discharge tube unit is electromagnetically coupled via a transformer to the second winding of the n-th discharge tube unit. The first windings of the second and subsequent discharge tube units are electromagnetically coupled via transformers to the second windings of the previous discharge tube units, respectively. | 09-04-2008 |
| 20080231208 | DISCHARGE LAMP LIGHTING APPARATUS AND SEMICONDUCTOR INTEGRATED CIRCUIT - A discharge lamp lighting apparatus includes a triangular signal oscillator, a first control part to compare the triangular signal with an error voltage between a reference voltage and a voltage corresponding to a first current passed through a secondary winding of a transformer and generate a first PWM control signal for turning on/off switching elements Qp | 09-25-2008 |
| 20080315785 | Systems and methods for backlighting image displays - Systems and methods for backlighting an image display by independently driving multiple backlights for the display. The display may be, for example, a LCD display panel of a portable information handling system such as a battery-powered notebook computer that employs two or more cold cathode fluorescent lamps (CCFLs) for backlighting the LCD display. The multiple backlights may be independently driven, for example, using a common inverter that is capable of independently driving two or more backlight lamps, or by driving each backlight lamp with a separate inverter. | 12-25-2008 |
| 20090033241 | Light emitting diode module and driving apparatus - A driving apparatus for driving a light emitting diode (LED) unit with a positive and a negative driving ends is provided. The driving apparatus includes first, second, and third rectifying units for driving the LED unit to illuminate respectively in response to the first, the second, and the third phase signals of an input signal. The first, the second, and the third rectifying units have the same circuit structure. Let the first rectifying unit be taken for example. The first rectifying unit includes first and second high breakdown-voltage diodes. The P end of the first high breakdown-voltage diode and the N end of the second high breakdown-voltage diode are connected for receiving the first phase signal; the N end of the first high breakdown-voltage diode and the P end of the second high breakdown-voltage diode are respectively connected to the negative and the positive driving ends. | 02-05-2009 |
| 20090146578 | Lamp-Lighting Apparatus - An economical device for lighting lamps such as discharge tubes. The lamp-lighting apparatus has an inverter transformer, a switching circuit connected with the primary winding of the inverter transformer and acting to perform switching for converting a voltage from an input power supply, a shunt transformer connected in series with the secondary winding of the inverter transformer, lamps connected in series with the shunt transformers, and a control circuit for producing a control signal to control the switching performed by the switching circuit based on the voltages at the junctions of the shunt transformer and each of the lamps without directly detecting the voltage applied to the secondary winding of the inverter transformer. The number of protective circuits can be reduced. Consequently, the cost can be reduced. | 06-11-2009 |
| 20090195173 | DISCHARGE LAMP OPERATING SYSTEM - A discharge lamp operating system has first and second discharge lamp operating circuits. The first discharge lamp operating circuit includes a first and second primary winding, a first secondary winding, a first discharge lamp connected to the first primary winding, and a second discharge lamp connected to the second primary winding. The second discharge lamp operating circuit includes a third and fourth primary winding, a second secondary winding, a third discharge lamp connected to the third primary winding, and a fourth discharge lamp connected to the fourth primary winding. The first secondary winding and the second secondary winding are connected in series. | 08-06-2009 |
| 20090195174 | ARRANGEMENT SUITABLE FOR DRIVING FLOATING CCFL BASED BACKLIGHT - A backlighting arrangement constituted of: a means for receiving an alternating current comprising a first lead and a second lead; at least one luminaire; and at least one first balancing transformer pair each associated with a particular one of the at least one luminaire, the primary of a first balancing transformer of the first balancing transformer pair serially coupled between the first lead of the means for receiving an alternating current and a first end of each of the at least one luminaire, and the primary of a second balancing transformer of the first balancing transformer pair serially coupled between the second lead of the means for receiving an alternating current and a second end of each of the at least one luminaires The secondaries of all of the at least one first balancing transformer pair are serially connected in a closed in-phase loop. | 08-06-2009 |
| 20090195175 | Direct Coupled Balancer Drive For Floating Lamp Structure - A backlighting arrangement constituted of a driving transformer arrangement; a plurality of lamp pairs, each of the constituent lamps of the plurality of lamp pairs exhibiting a first electrical connection and a second electrical connection; and a plurality of balancing transformers, each comprising a primary winding and a secondary winding magnetically coupled to the primary winding, and each associated with a particular one of the plurality of lamp pairs, the primary winding of each of the plurality of balancing transformers serially connected between the second electrical connections of the constituent lamps of the associated lamp pair, the secondary windings of the plurality of balancing transformers serially connected in phase, with a first end of the serially connected secondary windings of the balancing transformers connected to one phase output of the driving transformer arrangement. | 08-06-2009 |
| 20090195176 | DISCHARGE LAMP LIGHTING CIRCUIT - A discharge lamp lighting circuit is capable of preventing the discharge lamp from going out unexpectedly. The discharge lamp lighting circuit includes a DC-AC inverter which receives a power source voltage, boosts and converts the power source voltage into AC and supplies AC electric power to the discharge lamp | 08-06-2009 |
| 20100181928 | MULTI-LAMP DRIVING CIRCUIT - A multi-lamp driving circuit for driving a plurality of lamp groups includes an inversion circuit configured to drive the plurality of lamp groups and a current balance circuit electrically connected between the inversion circuit and the plurality of lamp groups. The current balance circuit includes a plurality of transformers, each including a first magnetic loop composed of a first primary winding and a first secondary winding and a second magnetic loop composed of a second primary winding and a second secondary winding. Numbers of turns of the second primary winding and the second secondary winding of each of the plurality of transformers are equivalent, and numbers of turns of the first primary winding and the first secondary winding of each of the plurality of transformers are equivalent. | 07-22-2010 |
| 20100320929 | LIGHTING FIXTURE SYSTEM FOR ILLUMINATION USING COLD CATHODE FLUORESCENT LAMPS - A lighting system for illuminating a chamber in a building includes a lighting fixture suitable for being mounted onto a surface of the chamber, so that light emitted by at least one CCFL device mechanically supported by the fixture illuminates the chamber. The one CCFL device includes at least one transformer. A driver adapted to be connected to a surface of the chamber is capable of converting input power from a power source to an AC power having a voltage in the range of about 5-400 volts at a frequency in the range of about 1 kc-100 kc. The at least one transformer is suitable for converting the AC power to an output power suitable for operating the at least one CCFL, causing the at least one CCFL to emit light. Physically separating the driver from the at least one CCFL device reduces the adverse effects of heat generated by the at least one CCFL device on the driver and increasing the useful life of the CCFL lighting system. A controller may be used to control light emitted substantially simultaneously by a plurality of the above lighting systems, such as for large commercial or public area illumination, by sending signals to the drivers to control the amount of power that is supplied to the CCFLs. Different power may be separately supplied to CCFLs having different phosphors in each of a plurality of CCFL devices in a plurality of the lighting systems, to adjust substantially simultaneously the color temperature of light emitted by the lighting systems. | 12-23-2010 |
| 20140265911 | HIGH-VOLTAGE INVERTER, DIELECTRIC-BARRIER DISCHARGE EVICE AND CATION APPARATUS - An inverter switches input voltage Vin to flow an excitation current to excitation winding Np of a transformer and output to a discharger an alternating voltage Vout from the output winding Ns. In an output circuit flowing a current to the discharger, a voltage-responsive connector is connected in series with the winding Ns to interrupt or connect the output circuit according to a voltage applied to between opposed electrodes. The voltage-responsive connector has characteristics of keeping the electrodes in an insulated state until an instantaneous value of the alternating voltage reaches a predetermined value, and holding the electrodes in a conduction state while the instantaneous value of the alternating voltage has reached the predetermined value and continues to exceed the predetermined value, and quickly returning the electrodes to the insulated state when the instantaneous value of the alternating voltage has fallen below the predetermined value. | 09-18-2014 |
