Magnetic field shielding sheet for a wireless charger, method for manufacturing same, and receiving apparatus for a wireless charger using the sheet
First Claim
1. A magnetic field shield sheet for a wireless charger, the magnetic field shield sheet comprising:
- a thin magnetic sheet 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; 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 tape,wherein gaps among the plurality of fine pieces are filled by some parts of the first and second adhesive layers.
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0 Petitions
Accused Products
Abstract
Provided are 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 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.
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Citations
18 Claims
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1. A magnetic field shield sheet for a wireless charger, the magnetic field shield sheet comprising:
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a thin magnetic sheet 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; 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 tape, wherein gaps among the plurality of fine pieces are filled by some parts of the first and second adhesive layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of manufacturing a magnetic field shield sheet for a wireless charger, the method comprising the steps of:
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adhering a protective film and a double-sided tape having a release film formed on an exposed surface of the double-sided tape, on both sides of a thin magnetic sheet, to thereby form a laminate sheet; performing a flake treatment process of the laminate sheet to thus separate the thin magnetic sheet into a plurality of fine pieces; and laminating the flake treated laminate sheet, to thus fill some parts of a first adhesive layer provided on the protective film and a second adhesive layers provided on the double-sided tape into gaps among the plurality of fine pieces, together with flattening and thinning of the laminate sheet. - View Dependent Claims (13, 14)
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15. A reception device for a wireless charger that charges a secondary battery from a transmission device for the wireless charger, the reception device comprising:
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a secondary coil that receives a wireless high frequency signal transmitted from the transmission device; and a magnetic field shield sheet that is disposed between the secondary coil and the secondary battery, and that shields a magnetic field generated by the wireless high frequency signal and simultaneously induces the secondary coil to absorb the wireless high frequency signal necessary to perform a wireless charging function, wherein the magnetic field shield sheet comprises; a thin magnetic sheet 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; 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 tape, wherein gaps among the plurality of fine pieces are filled by some parts of the first and second adhesive layers. - View Dependent Claims (16, 17, 18)
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Specification