There are provided a thin transformer capable of being used in a thin display device such as a liquid crystal display (LCD) device, a light emitting diode (LED) display device, and a flat panel display device including the same. The transformer includes: a bobbin part including inner and outer bobbins each including a pipe shaped body part having a though-hole formed in an inner portion thereof and a flange part protruding outwardly from both ends of the body part; coils respectively wound around the inner and outer bobbins; and a core electromagnetically coupled to the coils to thereby form a magnetic path, wherein the inner bobbin is inserted into the through-hole of the outer bobbin to thereby be coupled to the outer bobbin and at least one of the inner and outer bobbins includes the flange part having a width larger than a thickness of the body part.

Claims

13 · 1 independent · depth 4

13 granted claims

›1.independentA transformer comprising:na bobbin part including inner and outer bobbins each including a pipe shaped body part having a though-hole formed in an inn…+12

›2.↳ 1The transformer of claim 1, wherein the inner bobbin is inserted into the through-hole of the outer bobbin so that the flange part of the inner bobbin…d2

›3.↳ 1The transformer of claim 1, wherein each of the inner and outer bobbins includes a terminal connection part protruding outwardly from one side of a lo…d2+3

›5.↳ 1The transformer of claim 1, wherein in the fitting protrusion, a pair of fitting protrusions protrude from the outer peripheral edge of the upper flan…d2

›6.↳ 1The transformer of claim 1, wherein the coupling grooves are formed in a groove shape in an upper end of an inner peripheral surface of the body part …d2+3

›10.↳ 1The transformer of claim 1, wherein the coil includes a primary coil wound around the inner bobbin and a secondary coil wound around the outer bobbin,…d2

›11.↳ 1The transformer of claim 1, wherein the bobbin part further includes at least one intermediate bobbin interposed between the outer bobbin and the inne…d2

Classifications

2 codes

IPC · International Patent Classification

Section H — Electricity

H01F27/30

USPC · US Patent Classification

336/198

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

Pendency

2.3 y

851 days filing → grant

Office actions

after a restriction

Responses

1 RCE

Examiner

Tuyen Nguyen

art unit 2832 · TC 2800

Law firm

Law firm · Log in to unlock

Citations: 57 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20120001887 A1	5 Jan 2012

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.