Apparatus for contactless charging of mobile terminal

• US 8,941,352 B2
• Filed: 05/18/2011
• Issued: 01/27/2015
• Est. Priority Date: 05/19/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Hong, Woong Sun
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): OMAR, AHMED H
• Application Number:
  US13/110,340
• Publication Number:
  US 20110285348A1
• Time in Patent Office: 1,350 Days
• Field of Search: 320/108
• US Class Current: 320/108
• CPC Class Codes: H01F 5/003 Printed circuit coils
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

A contactless charging apparatus of a portable terminal is provided. The contactless charging apparatus of a portable terminal includes a main circuit board, a rectifying unit, a charging unit, and a secondary coil unit mounted on the main circuit board for generating an electromotive force. The secondary coil unit may be formed on the main circuit board in a patterning process instead of an existing copper line coil. A coil layer formed in the patterning process generates an electromotive force induced by a magnetic induction field created by a contactless charger, and a direct current is applied to a battery to charge the battery using the rectifying unit and the charging unit.

Claims

1. A contactless charging apparatus of a portable terminal, the apparatus comprising:

a main circuit board comprising a circuit wiring formed thereon through a patterning process;

a rectifying unit formed at an outermost layer of the main circuit board;

a charging unit formed at the outermost layer of the main circuit board and electrically connected to the rectifying unit; and

a secondary coil unit configured to generate an electromotive force which is induced by a primary coil mounted in a contactless charger, and to be formed at an inner layer under the outermost layer among inner layers of the main circuit board through the patterning process and electrically connected to the rectifying unit through via holes and a wiring layer,

wherein the secondary coil unit comprises a coil layer spirally formed on a portion of the main circuit board.

2. The apparatus of claim 1, wherein the secondary coil unit comprises a conductive material.

3. The apparatus of claim 1, wherein the secondary coil unit comprises a coil layer having a shape of at least one of a circle, an ellipse, a hexagon, and a square.

4. The apparatus of claim 3, wherein the secondary coil unit comprises a conductive material.

5. The apparatus of claim 1, wherein the secondary coil unit is formed on an inner layer of the main circuit board.

6. The apparatus of claim 5,

wherein both ends of the secondary coil unit are electrically connected to a connecting terminal of the rectifying unit through the via holes and the wiring layer, respectively.

7. The apparatus of claim 1, wherein the contactless charging apparatus is provided in a baseband block to reduce electromagnetic interference with a Radio Frequency (RF) block on the main circuit board.