News Column

Patent Issued for Transformer and Display Device Using the Same

June 25, 2014



By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Lee, Young Min (Gyunggi-do, KR); Won, Jae Sun (Gyunggi-do, KR); Kim, Jong Hae (Gyunggi-do, KR); Kim, Deuk Hoon (Gyunggi-do, KR); Park, Geun Young (Gyunggi-do, KR), filed on April 9, 2012, was published online on June 10, 2014.

The assignee for this patent, patent number 8749336, is Samsung Electro-Mechanics Co., Ltd. (Gyunggi-do, KR).

Reporters obtained the following quote from the background information supplied by the inventors: "The present invention relates to a transformer, and more particularly, to a transformer having a minimized leakage inductance.

"Various kinds of power supplies are required in various electronic devices such as a television (TV), a monitor, a personal computer (PC), an office automation (OA) device, and the like. Therefore, these electronic devices generally include power supplies converting an alternating current (AC) power supplied from the outside into a power required for each electronic appliance.

"Among power supplies, a power supply using a switching mode (for example, a switch mode power supply (SMPS)) has mainly recently been used. This SMPS basically includes a switching transformer.

"The switching transformer generally converts an AC power of 85 to 265 V into a direct current (DC) power of 3 to 30 V through high frequency oscillation of 25 to 100 KHz. Therefore, the switching transformer has significantly reduced core and bobbin sizes as compared to a general transformer converting an AC power of 85 to 265 V into an AC current of 3 to 30 V through frequency oscillation of 50 to 60 Hz, and stably supplies a low voltage and low current DC power to an electronic appliance. Accordingly, the switching transformer has recently been widely used in an electronic appliance that has tended to be miniaturized.

"This switching transformer needs to be designed to have a small leakage inductance in order to increase energy conversion efficiency. However, in accordance with the miniaturization of the switching transformer, it may be difficult to design a switching transformer having a small leakage inductance."

In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "An aspect of the present invention provides a small sized switching transformer.

"An aspect of the present invention also provides a transformer having a minimized leakage inductance.

"According to an aspect of the present invention, there is provided a transformer including: a winding part including a pipe shaped body part having a plurality of coils wound therearound and flange parts extended from both ends of the body part in an outer diameter direction thereof; and a core coupled to the winding part, wherein a flange part formed at one end of the body part includes at least one lead groove, and the coils are led to the outside of the winding part through the at least one lead groove.

"The transformer may further include a terminal connection part spaced apart from one end of the winding part by a predetermined distance and including a plurality of external connection terminals connected thereto.

"The transformer may further include a lead wire skip part formed in a space between the winding part and the terminal connection part and including lead wires of the coils inserted thereinto to thereby be led to the external connection terminals.

"The winding part may include a plurality of winding spaces divided by at least one partition wall formed on an outer peripheral surface of the body part.

"The partition wall may include at least one skip groove formed therein, and the coils may be wound while skipping the partition wall through the at least one skip groove.

"The lead wire skip part may include at least one guide protrusion formed therein, the at least one guide protrusion protruding from the terminal connection part or the flange parts.

"The lead groove may be formed by cutting a portion of the flange part so that an outer peripheral surface of the body part is exposed.

"The flange part formed at one end of the body part may include an extension groove in a portion of the lead groove adjacent to the body part, the extension groove formed by extending a width of the lead groove.

"The extension groove may have a chamfered edge portion.

"The flange part formed at one end of the body part may have an increased area in a direction in which the lead groove is formed to thereby have an area greater than that of the other flange part.

"The terminal connection part may be exposed outwardly of the core.

"The terminal connection part may be disposed to be spaced apart from one end of the winding part, corresponding to a thickness of the core.

"The coils may include a plurality of primary coils and a plurality of secondary coils.

"The coils may be wound and stacked such that the plurality of secondary coils may be interposed between the plurality of primary coils.

"The primary coils may be multi-insulated coils.

"At least one of the plurality of coils may be a multi-insulated coil.

"The multi-insulated coil may be disposed in at least one of an innermost position or an outermost position of the coils wound and stacked in the winding part.

"According to another aspect of the present invention, there is provided a display device including: a power supply including at least one transformer as described above mounted on a substrate thereof; a display panel receiving power from the power supply; and a cover protecting the display panel and the power supply.

"The coils of the transformer may be wound so as to be parallel with the substrate of the power supply."

For more information, see this patent: Lee, Young Min; Won, Jae Sun; Kim, Jong Hae; Kim, Deuk Hoon; Park, Geun Young. Transformer and Display Device Using the Same. U.S. Patent Number 8749336, filed April 9, 2012, and published online on June 10, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8749336.PN.&OS=PN/8749336RS=PN/8749336

Keywords for this news article include: Samsung Electro-Mechanics Co. Ltd.

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Source: Journal of Engineering


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