Reception device for wireless charging

• US 9,748,791 B2
• Filed: 01/23/2015
• Issued: 08/29/2017
• Est. Priority Date: 01/07/2014
• Status: Active Grant

• Current Assignee: Hitachi-Lg Data Storage Korea Incorporated (Hitachi, Ltd.)
• Original Assignee: Hitachi-Lg Data Storage Korea Incorporated (Hitachi, Ltd.)
• Inventors: Lee, Hyunmin, Choi, Seonghwan
• Primary Examiner(s): Tat, Binh
• Application Number:
  US14/603,944
• Publication Number:
  US 20150194840A1
• Time in Patent Office: 949 Days
• Field of Search: 320107-115
• 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

Disclosed herein is a reception device for wireless charging. The reception device for wireless charging may include a reception antenna configured to generate an electric current based on a change of magnetism and a charging circuit unit configured to convert the electric current generated by the reception antenna into direct current. The reception antenna and the charging circuit unit may be connected to a flexible board. Accordingly, the reception device can be attached to the casing of a smart terminal while minimizing a change in the thickness of the smart terminal. A task for connecting the antenna and charging circuit unit of the reception device can be eliminated. A wireless charging function can be assigned to a smart terminal by simply replacing the casing of the smart terminal not having the wireless charging function.

Claims

1. A reception device for wireless charging, comprising:

a reception antenna formed in a pattern form in a flexible board and configured to generate an electric current based on a change of magnetism; and

a charging circuit unit configured to convert the electric current generated by the reception antenna into direct current,

wherein the charging circuit unit is connected to the reception antenna via the flexible board,

wherein the charging circuit unit comprises a power conversion unit configured to convert an induction current generated by the reception antenna into direct current, and

wherein the charging circuit unit further comprise comprises at least one of the battery protection unit configured to prevent an excessive rise in voltage output by the power conversion unit and a control unit configured to perform communication with a power transmission unit.

2. The reception device of claim 1, wherein the flexible board comprises exposed terminals extended from the charging circuit unit and connected to a main body.

3. The reception device of claim 1, further comprising an electromagnetic wave absorption sheet.

4. The reception device of claim 3, wherein the electromagnetic wave absorption sheet is configured to cover at least part of the reception antenna and the charging circuit unit.

5. The reception device of claim 1, wherein the reception antenna and the charging circuit unit are integrated in the flexible board.