Loading patent…
AssigneeAmosense Co., Ltd.
InventorsDong Hoon LEE, Kil Jae JANG
Estimating the term…
Provided are a magnetic field shield sheet for a wireless charger, a method of manufacturing the sheet, and a receiver for the wireless charger by using the sheet. The sheet includes at least one layer thin magnetic sheet made of an amorphous ribbon separated into a plurality of fine pieces; a protective film that is adhered on one surface of the thin magnetic sheet via a first adhesive layer provided on one side of the protective film; and a double-sided tape that is adhered on the other surface of the thin magnetic sheet via a second adhesive layer provided on one side of the double-sided adhesive tape, wherein gaps among the plurality of fine pieces are filled by some parts of the first and second adhesive layers, to thereby isolate the plurality of fine pieces.
A magnetic field shield sheet for a wireless charger, the magnetic field shield sheet comprising:
A reception device for a wireless charger that charges a secondary battery from a transmission device for the wireless charger, the reception device comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations,…:…
Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding: characterised by using adhesives
With all layers existing as coherent layers before laminating: involving the assembly of discrete sheets or panels only
Ancillary operations in connection with laminating processes: cutting, tearing or severing, e.g. bursting; Cutter details
Term end not estimated
The present invention relates to a magnetic field shield sheet for a wireless charger, a method of manufacturing the magnetic field shield sheet, and a receiver for the wireless charger by using the magnetic field shield sheet, and more particularly to, a magnetic field shield sheet for a wireless charger, which blocks an effect of an alternating-current magnetic field generated when a charger function for a portable mobile terminal device is implemented in a non-contact wireless manner on a main body of the portable mobile terminal device and exhibits excellent electric power transmission efficiency, a method of manufacturing the magnetic field shield sheet, and a receiver for the wireless charger by using the magnetic field shield sheet.
As methods of charging secondary batteries mounted in electronic equipment such as portable terminals and video cameras, there are two types of charging methods, i.e., a contact type charging method and a non-contact type charging method. The contact type charging method carries out a charging operation by making an electrode of a power reception device in direct contact with an electrode of a power feeding device.
The contact type charging method is commonly used in a wide range of applications, since a structure of a device implementing the contact type charging method is simple. However, in association with miniaturization and weight reduction of electronic equipment, various electronic devices become light in the weight thereof, and accordingly a low contact pressure between electrodes of the power reception device and the power feeding device may cause problems such as charge failure charge error. Further, secondary batteries are weak at heat, which needs to prevent the temperature rise of the batteries, and to pay attention to a circuit design so as not to cause overcharge and overdischarge. To cope with these problems, a non-contact type charging method is being considered in recent years.
FIG. 1 is an exploded perspective view showing a magnetic field shield sheet for a wireless charger according to the present invention.
FIG. 2 is a cross-sectional view showing an example of using one piece of nanocrystalline ribbon sheet according to a first embodiment of the present invention.
FIG. 3 is a cross-sectional view showing an example of using six pieces of nanocrystalline ribbon sheets according to a second embodiment of the present invention.
The above and other objects, features, and advantages of the present invention can be appreciated by the following description and will be understood more clearly by embodiment of the present invention. In addition, it will be appreciated that the objects and advantages of the present invention will be easily realized by means shown in the appended patent claims, and combinations thereof. Accordingly, the technical spirit of the present invention can be easily implemented by one of ordinary skill in the art.
Further, if it is determined that the detailed description of the known art related to the present invention makes the gist of the present invention unnecessarily obscure, a detailed description thereof will be omitted.
FIG. 1 is an exploded perspective view showing a magnetic field shield sheet for a wireless charger according to the present invention, and FIG. 2 is a cross-sectional view showing an example of using one piece of nanocrystalline ribbon sheet according to a first embodiment of the present invention.