METHOD AND APPARATUS FOR TRANSMITTING POWER AND DATA FOR USB DEVICE

• US 20120098352A1
• Filed: 06/28/2010
• Published: 04/26/2012
• Est. Priority Date: 07/17/2009
• Status: Abandoned Application

• Current Assignee: Aska Electron Co., Ltd., Fujikura Limited, Yonezawa Electric Wire Company Limited (Fujikura Limited)
• Original Assignee: Aska Electron Co., Ltd., Fujikura Limited, Yonezawa Electric Wire Company Limited (Fujikura Limited)
• Inventors: Takaishi, Konomu
• Application Number:
  US13/382,213
• Publication Number:
  US 20120098352A1
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• 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 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

In a power and data transmission method which can transmit power and information (data) simultaneously and contactlessly to a USB device using a USB interface, and an apparatus therefor, a pair of coil units are magnetically coupled to each other. Each of the coil units has: a power transmission coil configured by a coil which is wound in a plane, and a magnetic shield member which is placed on a rear surface of the coil; and an information transmission coil configured by a coil which is wound in a plane, and a magnetic shield member which is placed on a rear surface of the coil, the coil diameter of the information transmission coil is made different from that of the power transmission coil, and the information transmission coil and the power transmission coil are stacked. Data are transmitted while power is transmitted to the USB device.

Claims

1. A power and data transmission method for a USB device wherein a pair of coil units (1) are magnetically coupled to each other, each of said coil units having:

a power transmission coil (4) configured by a coil (2) which is wound in a plane, and a magnetic shield member (3) which is placed on a rear surface of said coil (2); and

an information transmission coil (7) configured by a coil (5) which is wound in a plane, and a magnetic shield member (6) which is placed on a rear surface of said coil (5), a coil diameter of said information transmission coil (7) being formed to be smaller than a coil diameter of said power transmission coil (4), said information transmission coil (7) and said power transmission coil (4) being stackingly placed in a state where said information transmission coil (7) is positioned in a coil outer circumferential portion of said power transmission coil (4), and data are transmitted while power is transmitted to the USB device.

2. A power and data transmission apparatus for a USB device wherein a pair of coil units (1) are magnetically coupled to each other, each of said coil units having:

a power transmission coil (4) configured by a coil (2) which is wound in a plane, and a magnetic shield member (3) which is placed on a rear surface of said coil (2); and

an information transmission coil (7) configured by a coil (5) which is wound in a plane, and a magnetic shield member (6) which is placed on a rear surface of said coil (5), a coil diameter of said information transmission coil (7) being formed to be smaller than a coil diameter of said power transmission coil (4), said information transmission coil (7) and said power transmission coil (4) being stackingly placed in a state where said information transmission coil (7) is positioned in a coil outer circumferential portion of said power transmission coil (4), and data are transmitted while power is transmitted to the USB device.