Source: http://www.google.com/patents/US7365501?ie=ISO-8859-1
Timestamp: 2015-01-30 21:49:21
Document Index: 509104255

Matched Legal Cases: ['Application No. 093129568', 'Application No. 094200841', 'Application No. 094202391', 'art 63', 'art 63', 'arts 61', 'art 63', 'art 22']

Patent US7365501 - Inverter transformer - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn inverter transformer includes a coil unit including a bobbin and a plurality of windings, and a transformer core unit. The bobbin is formed with a core-receiving compartment, and includes first, second and third coil winding portions. The windings are wound around the first, second and third coil...http://www.google.com/patents/US7365501?utm_source=gb-gplus-sharePatent US7365501 - Inverter transformerAdvanced Patent SearchPublication numberUS7365501 B2Publication typeGrantApplication numberUS 11/240,942Publication dateApr 29, 2008Filing dateSep 29, 2005Priority dateSep 30, 2004Fee statusPaidAlso published asUS20060066246Publication number11240942, 240942, US 7365501 B2, US 7365501B2, US-B2-7365501, US7365501 B2, US7365501B2InventorsMasakazu Ushijima, Chun-Yi ChangOriginal AssigneeGreatchip Technology Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (18), Referenced by (8), Classifications (10), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetInverter transformerUS 7365501 B2Abstract An inverter transformer includes a coil unit including a bobbin and a plurality of windings, and a transformer core unit. The bobbin is formed with a core-receiving compartment, and includes first, second and third coil winding portions. The windings are wound around the first, second and third coil winding portions, respectively. The transformer core unit has an internal core part that extends into the core-receiving compartment.
wherein each of said lamp loads is connected in series between said secondary winding of the respective one of said first and second coil units, and said tertiary winding of the other one of said first and second coil units. Description
CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority of Taiwanese Application No. 093129568, filed on Sep. 30, 2004, Taiwanese Application No. 094200841, filed on Jan. 17, 2005, and Taiwanese Application No. 094202391, filed on Feb. 5, 2005.
SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide an inverter transformer that is adapted to supply balanced current outputs to discharge lamps in a lamp assembly so as to ensure uniform illumination.
As shown in FIG. 5, the fourth preferred embodiment of an inverter transformer 100 c according to the present invention differs from the second preferred embodiment (shown in FIG. 3) in that the bobbin 1 c includes a fourth coil winding portion 16 disposed between an adjacent pair of the second coil winding portions 14. In addition, the windings 3 c include a pair of the primary windings 33 that are wound around the first and fourth coil winding portions 13, 16, respectively. When the inverter transformer 100 c is applied to a lamp assembly, the magnetic couplings between adjacent pairs of the primary, secondary, and tertiary windings 33, 34, 35 provide a plurality of magnetic circuit loops, such that a plurality of discharge lamps can be illuminated by the inverter transformer 100 c. As shown in FIG. 6 and FIG. 7, the fifth preferred embodiment of an inverter transformer 100 d according to the present invention differs from the first preferred embodiment (shown in FIG. 1) in that the bobbin 1 d extends in an upright direction, and that the lead terminals 12 are provided only on a bottom end of the bobbin 1 d. As shown in FIG. 8, the sixth preferred embodiment of an inverter transformer 100 e according to the present invention includes a coil unit including a bobbin 5 and windings 3 e, and a transformer core unit 6.
As shown in FIG. 9 and FIG. 10, the seventh preferred embodiment of an inverter transformer 100 f according to the present invention differs from the sixth preferred embodiment in that the transformer core unit 6 f further includes an internal core part 63 configured as an I-shaped core and disposed in the core-receiving compartment 51. In this embodiment, the internal core part 63 interconnects the protruding portions 611, 621 of the first and second core parts 61, 62. Similar to the first preferred embodiment, when the primary winding 33 is supplied with electric current from an external electric source (not shown), magnetic couplings (A′), (B′) are established through the transformer core unit 6 f between the primary and secondary windings 33, 34, and between the secondary and tertiary winding 34, 35 to stabilize outputs of the inverter transformer 100 f. It should be noted that there can be spaces between the internal core part 63 and the adjacent protrusions 621, 622 to form air gaps in other embodiments of the present invention. The widths of the air gaps can be adjusted so as to adjust the induced currents in the windings for lamp impedance matching.
Similarly, as shown in FIG. 12, the ninth preferred embodiment of an inverter transformer 100 h according to the present invention differs from the eighth preferred embodiment in that the bobbin 1 h has a pair of the second coil winding portions 14 disposed between the first and third winding portions 13, 15, and that the spacer portion 17 is disposed between the pair of the second coil winding portions 14. The protruding portion 221 h of the external core part 22 h of the transformer core unit 2 h forms air gaps (M) with each of the secondary windings 34 of the windings 3 h. Shown in FIG. 13 to FIG. 16 are various configurations of the transformer core unit 2′, 2″, 2′″, 2″″ to illustrate possible arrangements for the inverter transformer and possible locations of the air gap (M). The bobbins 1 are presented using the dotted lines in these figures. Since the feature of the present invention does not reside in the particular configuration of the transformer core unit 2, and in the location of the air gap (M), the same should not be relied upon to limit the scope of the present invention.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4041364 *Feb 3, 1977Aug 9, 1977General Electric CompanyElectromagnetically shielded electrical converter and an improved electromagnetic shield thereforUS4766406 *Nov 16, 1987Aug 23, 1988Universal Manufacturing CorporationFluorescent ballast assemblyUS4857876 *Feb 27, 1989Aug 15, 1989Valmont Industries, Inc.Shunt latchUS5359313 *Dec 1, 1992Oct 25, 1994Toko, Inc.Step-up transformerUS6459213 *Apr 6, 1992Oct 1, 2002Ole K. NilssenBallast for parallel-connected lampsUS6894596 *Nov 6, 2003May 17, 2005Minebea Co., Ltd.Inverter transformer to light multiple lampsUS7015785 *Dec 12, 2003Mar 21, 2006Delta Electronics, Inc.Inverter transformer and core structure thereofUS7141933 *Oct 20, 2004Nov 28, 2006Microsemi CorporationSystems and methods for a transformer configuration for driving multiple gas discharge tubes in parallelUS20020016738Jun 20, 2001Feb 7, 2002Coile Brantley W.Computer systemJP2002043148A Title not availableJP2002075672A Title not availableJP2004281134A * Title not availableJPH0935885A Title not availableJPH11297550A Title not availableJPS5432750A Title not availableJPS63175405A Title not availableTW251271U Title not availableTW592379U Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7477023 *Sep 7, 2007Jan 13, 2009Samsung Electronics Co., Ltd.Inverter circuit and backlight assembly having the sameUS7528552 *Dec 30, 2005May 5, 2009Lien Chang Electronic Enterprise Co., Ltd.Power transformer combined with balance windings and application circuits thereofUS7612643 *Jul 26, 2008Nov 3, 2009Logah Technology Corp.Winding structure of a transformerUS7760063 *Sep 23, 2008Jul 20, 2010Delta Electronics, Inc.Structure of transformerUS8084954 *Apr 13, 2009Dec 27, 2011Samsung Electro-Mechanics Co., Ltd.Lamp driving circuitUS8174203 *Apr 29, 2009May 8, 2012Samsung Electro-Mechanics Co., Ltd.Lamp driving circuitUS8648686Jan 11, 2012Feb 11, 2014Delta Electronics, Inc.Resonant transformer and resonant converter employing sameUS20100253243 *Apr 29, 2009Oct 7, 2010Samsung Electro-Mechanics Co., Ltd.Lamp driving circuit* Cited by examinerClassifications U.S. Classification315/278, 336/170, 336/173, 315/312, 336/212International ClassificationH05B41/16Cooperative ClassificationH05B41/2822, H01J61/56European ClassificationH01J61/56, H05B41/282M2Legal EventsDateCodeEventDescriptionSep 23, 2011FPAYFee paymentYear of fee payment: 4Sep 29, 2005ASAssignmentOwner name: GREATCHIP TECHNOLOGY CO., LTD., TAIWANOwner name: YAO SHENG ELECTRONICS CO., LTD., TAIWANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:USHIJIMA, MASAKAZU;CHANG, CHUN-YI;REEL/FRAME:017056/0001Effective date: 20050921RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services