Distributor Switch Means In The Primary Circuits Of Plural Transformers Patents (Class 315/213)
  • Patent number: 10502176
    Abstract: A system and method for delivering spark to an engine is disclosed. In one example, a single conductor carries a spark signal that is indicative of a desired spark advance for a plurality of ignition coils. The system and method may reduce wiring complexity for spark plugs that are supplied energy via two ignition coils.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: December 10, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Michael Damian Czekala, Garlan J. Huberts, Qiuping Qu
  • Patent number: 9824475
    Abstract: A method can include rendering pixel representations of information to a rectangular display; and rendering pixel representations of perspectival text to the rectangular display where the pixel representations of perspectival text overlay a portion of the pixel representations of information. Various other methods, apparatuses, systems, etc., are also disclosed.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: November 21, 2017
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Aaron Michael Stewart, Howard J. Locker, John Weldon Nicholson, Michaela Rose Case
  • Patent number: 8829800
    Abstract: The present disclosure relates to a lighting component with multiple DC-DC converters. Each of the DC-DC converters is used to independently drive a corresponding string of LEDs. In general, rectifier circuitry receives an AC power signal and generates a rectified signal, which is provided to first and second converter circuitries. The first converter circuitry converts the rectified signal into a first drive voltage for a first string of LEDs and provides a first drive current for the first string of LEDs based on a first drive current control signal. Similarly, the second converter circuitry converts the rectified signal into a second drive voltage for a second string of LEDs and provides a second drive current for the second string of LEDs based on a second drive current control signal.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: September 9, 2014
    Assignee: Cree, Inc.
    Inventor: Michael J. Harris
  • Patent number: 8610660
    Abstract: An LED backlight driving circuit including a boost circuit and a transformer current balance circuit is provided. The boost circuit provides a total current for n LED strings, and the transformer current balance circuit is coupled to the LED strings and includes n?1 transformers. A first LED current-balance-circuit (CBC) includes a switching-transistor connected to a secondary-winding of a first-transformer, and an nth LED CBC includes a switching-transistor connected to a primary-winding of an (n?1)th transformer. An ith (1<i<n, n>2) LED CBC includes a switching-transistor sequentially connected to a primary-winding of an (i?1)th transformer and a secondary-winding of an ith transformer. The passive-transformers are applied in the LED driving circuit to implement current balance/equalization, such that the LED backlight driving circuit is suitable for a system with any odd or even number (greater than 1) of the LED strings connected in parallel, so as to reduce the cost of the system.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: December 17, 2013
    Assignees: FSP-Powerland Technology Inc., FSP Technology Inc.
    Inventors: Ming Xu, Shaobin Zhang
  • Publication number: 20130241429
    Abstract: A method for actuating a spark plug, in which the spark plug is assigned a first ignition coil and second ignition coil.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 19, 2013
    Inventors: Ganghua Ruan, Dejan Kienzle
  • Patent number: 8373304
    Abstract: A current-sharing supply circuit includes a current providing circuit, a first output rectifier circuit, a second output rectifier circuit, a first current-sharing transformer, a second current-sharing transformer, a first current-sharing circuit and a second current-sharing circuit. By adjusting the equivalent impedance values of the first current-sharing circuit, the second current-sharing circuit, the primary winding coil of the first current-sharing transformer and the primary winding coil of the second current-sharing transformer, the first output current and the second output current are substantially identical.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: February 12, 2013
    Assignee: Delta Electronics, Inc.
    Inventors: Shih-Hsien Chang, Po-Nien Ko
  • Patent number: 8188617
    Abstract: A current balancing apparatus includes a first transformer having a first primary winding and a first secondary winding electromagnetically coupled with the first primary winding, the first primary winding having a first end connected to a first load that passes a first current; a second transformer having a second primary winding and a second secondary winding electromagnetically coupled with the second primary winding, the second primary winding having a first end connected to a second load that passes a second current having an AC component substantially having a 180-degree phase difference with respect to the first current; and a series circuit including the first secondary winding, the second secondary winding, and a current smoother, to balance the first current and second current with each other.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: May 29, 2012
    Assignee: Sanken Electric Co., Ltd.
    Inventors: Kengo Kimura, Shinji Aso
  • Patent number: 7567039
    Abstract: A multiple discharge lamp lighting apparatus is provided which achieves stable and uniform lamp currents in a plurality of discharge lamps without a ballast element at the secondary side of an inverter transformer. The multiple discharge lamp lighting apparatus includes an inverter, and a plurality of inverter transformers each of which has a discharge lamp connected at a secondary winding thereof. A balance inductance element is provided between the primary side wirings of any adjacent pair of the plurality of inverter transformers. Each of the inverter transformers includes a tight coupling section and a loose coupling section, which function as a balance coil and an impedance element, respectively, whereby the lamp currents of the discharge lamps are stabilized and equalized without using a high withstand voltage element.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: July 28, 2009
    Assignee: Minebea Co., Ltd.
    Inventors: Hiroshi Shinmen, Robert Weger
  • Patent number: 7541747
    Abstract: There is provided a multiple discharge lamp lighting apparatus, which includes an inverter and plurality of inverter transformer. In the multiple discharge lighting apparatus, a discharge lamp is connected to the secondary winding of each inverter transformer, a ballast impedance element is connected in series between a switch of the inverter and the primary winding of each inverter transformer, and a current balancing unit is provided between each two adjacent inverter transformers.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: June 2, 2009
    Assignee: Minebea Co., Ltd
    Inventors: Hiroshi Shinmen, Robert Weger
  • Publication number: 20090108764
    Abstract: A lamp ballast includes an inverter circuit, a resonant circuit, a control circuit, and a startup circuit. When the DC bus reaches its final value, a capacitor in the startup circuit charges to a predetermined voltage, at which point a pulse is sent to start a gate drive circuit in the inverter. Additionally, a gate in the control circuit is initially OFF, allowing full power to the lamp, and a capacitor in the control circuit charges to a predetermined voltage, at which point a gate is turned ON. When the gate is ON, power to the lamp is reduced. The control circuit capacitor is selected so that it charges for a sufficient period to allow the lamp to complete a glow phase of startup before turning on the gate and reducing power as the lamp transitions into an arc phase.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Inventor: Louis Robert Nerone
  • Patent number: 7394213
    Abstract: A multi-lamp driver t disclosed, comprising a power driver coupled to a plurality of lamps to supply power thereto, a feedback circuit coupled to at least one of the lamps to generate a feedback signal, a control circuit coupled between the feedback circuit and the power driver to control the power driver according to an illumination control signal and the feedback signal for total illumination adjustment of the lamps, and at least one switch controlled by the control circuit to turn at least one of the lamps on or off. In a total illumination adjustment of the lamps, the switch turns on or off timely. The difference between the maximum and minimum value of the total illumination of the lamps is thus increased.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: July 1, 2008
    Assignee: QISDA Corporation
    Inventors: Chung-Jung Huang, Yung-Yi Hsu
  • Patent number: 7336039
    Abstract: A driving device for driving discharge lamps (14) includes a first pulse circuit (11), a second pulse circuit (13), and a primary driving circuit (12). The first pulse circuit includes an input end, a first output end (1), and a second output end (2). The second pulse circuit includes an input end, a third output end (3), and a fourth output end (4). The primary driving circuit is connected between the first pulse circuit and the second pulse circuit for generating drive signals. The second output end of the first pulse circuit is connected to the third output end of the second pulse circuit, and the fourth output end of the second pulse circuit is connected to ground.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: February 26, 2008
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Chia-Kun Chen, Chia-Peng Wang
  • Patent number: 7309962
    Abstract: A protection control circuit for discharge lamps aims to control protection signals input to a load at a rear end of a high voltage output zone that are generated during abnormal conditions. The high voltage output zone has a control unit and a driving unit, and a switch device interposed between them to receive a first voltage distribution signal output from the control unit and output a plurality of second voltage distribution signals corresponding to the number of the driving devices. Each of the driving devices is connected to a high voltage output zone line of the discharge lamp that feeds back a protection signal to the switch device. The switch device determines a first electricity condition or a second electricity condition of each high voltage output zone line of the discharge lamps that is connected to the individual driving device.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: December 18, 2007
    Assignee: Zippy Technology Corp.
    Inventors: Chin-Wen Chou, Ying-Nan Cheng, Chin-Biau Chung
  • Patent number: 7230390
    Abstract: A cold cathode fluorescent lamp (CCFL) assembly includes a pair of CCFLs, and an inverter-type drive circuit. The drive circuit includes a first transformer having a primary winding adapted to be coupled to a power supply module, and a secondary winding with a pair of terminals. The CCFLs are coupled respectively to the terminals of the secondary winding. The drive circuit further includes a push-pull drive circuit coupled to the primary winding of the first transformer, and adapted to be coupled to the power supply module. The push-pull drive circuit excites the primary winding of the first transformer upon receiving power from the power supply module such that power is transferred from the primary winding to the secondary winding, thus activating the CCFLs coupled thereto.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: June 12, 2007
    Assignee: Top Victory Electronics (Taiwan) Co., Ltd.
    Inventor: Chao-Hua Wu
  • Patent number: 7221103
    Abstract: A circuit for operating high-pressure discharge lamps, wherein a voltage transformer for power supply to a loading circuit includes a connection for the high-pressure discharge lamp (La) and for the secondary winding (L1b) of an ignition transformer (T1) for an impulse ignition system for igniting a gaseous discharge in the high-pressure discharge lamp. The loading circuit includes at least one capacitor (C1) serially arranged with the secondary winding (L1b) of the ignition transformer (T1) when the impulse ignition system is reconnected, the capacity of the capacitor (C1) being selected in such away that the capacitor (C1) substantially forms a bridging for ignition impulses generated by the impulse ignition device in such a way that after ignition of the gaseous discharge in the high-pressure discharge lamp (La), at least one partial compensation of the ignition transformer (T1) is produced when the lamp current passes through the secondary winding (L1b).
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: May 22, 2007
    Assignee: Patent-Treuhand-Gesellschaft fur Elektrische Gluhlampen mbH
    Inventor: Bernhard Siessegger
  • Patent number: 7173379
    Abstract: An incremental distributed driver divides power delivered to multiple lamps into two power delivery stages. The first power delivery stage operates in voltage-mode to provide a partial operating voltage to the lamps. The second power delivery stage operates in current-mode to regulate current levels for each of the lamps and to provide additional operating voltages for the respective lamps. Each of the power delivery stages includes a polarity-switching network and a common set of driving signals from a controller can be used to drive the polarity-switching networks of both power delivery stages. The first power delivery stage delivers a majority of the power to the lamps and the second power delivery stage facilitates control of individual lamps while providing the remaining power to the lamps.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: February 6, 2007
    Assignee: Microsemi Corporation
    Inventor: Newton E. Ball
  • Patent number: 7081717
    Abstract: A discharge lamp lighting apparatus for lighting a plurality of discharge lamps comprises: a control circuit adapted to output driving signals; a plurality of step-up transformers; and a plurality of bridge circuits, each of which is connected to a DC power supply, and drives the primary side of each of the step-up transformers according to the driving signals from the control circuit so as to light each of the discharge lamps connected respectively to the secondary sides of the step-up transformers. In the discharge lamp lighting apparatus, each of the bridge circuits is connected to the control circuit via synchronous switching elements, and the synchronous switching elements, according to each of synchronizing signals applied thereto, switch on and off the driving signals from the control circuit so as to controllably cause each of the bridge circuits to start and stop its operation.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: July 25, 2006
    Assignee: Minebea Co., Ltd.
    Inventor: Shinichi Suzuki
  • Patent number: 6478441
    Abstract: A hand held light apparatus is disclosed. The apparatus has a handle portion, a central portion, and a cap portion for mounting a lamp. An electric circuit, preferably located in the central portion, connects the lamp with a power source, preferably batteries in the handle portion, to activate the lamp in different selectable modes. The modes include at least a continuous on mode and an intermittent flashing mode. The apparatus is arranged to allow a member in an audience to show his or her appreciation of a performance by raising the apparatus and activating it in one or its operational modes. With its different operational modes, the apparatus also functions as an emergency signal indicator, and further can be made to serve in the way of a conventional flashlight.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: November 12, 2002
    Assignee: Sky City International Limited
    Inventor: Man Kuen Lam
  • Patent number: 4478201
    Abstract: A distributorless ignition system of an internal combustion engine has a supplementary spark energy module to increase spark energy. Two ignition coils each have secondary coils with split secondary center taps. Each of the primary windings is coupled to its own ignition module. The supplementary spark energy module is coupled to each of the split secondary center taps. A pair of spark plugs is coupled to one of the secondary windings and another pair of spark plugs is coupled to the other secondary winding.
    Type: Grant
    Filed: February 23, 1984
    Date of Patent: October 23, 1984
    Assignee: Ford Motor Company
    Inventor: Joseph R. Asik
  • Patent number: 4462380
    Abstract: A distributorless ignition system of an internal combustion engine has a supplementary spark energy module to increase spark energy. Two ignition coils each have secondary coils with split secondary center taps. Each of the primary windings is coupled to its own ignition module. The supplementary spark energy module is coupled to each of the split secondary center taps. A pair of spark plugs is coupled to one of the secondary windings and another pair of spark plugs is coupled to the other secondary winding.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: July 31, 1984
    Assignee: Ford Motor Company
    Inventor: Joseph R. Asik
  • Patent number: 4123689
    Abstract: A high energy ignition system makes use of induced transient voltages in an ignition transformer to intermodulate a plural number of such transients and thereby provide extremely high voltages to fire an igniter. The transformer output is connected in conventional manner to a standard distributor to sequentially energize igniters.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: October 31, 1978
    Inventor: Martin E. Gerry