Shielding film, coil assembly, and wireless charging device

An electronic device comprising a housing and an electrical component located in the housing, and further comprising a shielding film,

• wherein the shielding film comprises a first film layer comprising a first conductive part and a first insulating part, and the first insulating part penetrates the first conductive part or the first conductive part penetrates the first insulating part in a thickness direction of the first film layer,
• wherein under the influence of a magnetic field of a first electromagnetic field, a first eddy current is formed in the first film layer, and a loop of the first eddy current is located in the first conductive part;
• and under the influence of a magnetic field of a second electromagnetic field, a second eddy current is formed in the first film layer, and a loop of the second eddy current passes through the first insulating part,
• wherein a loop area of the first eddy current is less than a loop area of the second eddy current, and
• wherein
• the shielding film is disposed on at least a part of a periphery of the electrical component.

A wireless charging device, comprising a power supply and a coil assembly comprising an inductor coil and a shielding film,

• wherein the shielding film comprises a first film layer comprising a first conductive part and a first insulating part, and the first insulating part penetrates the first conductive part or the first conductive part penetrates the first insulating part in a thickness direction of the first film layer,
• wherein under the influence of a magnetic field of a first electromagnetic field, a first eddy current is formed in the first film layer, and a loop of the first eddy current is located in the first conductive part;
• and under the influence of a magnetic field of a second electromagnetic field, a second eddy current is formed in the first film layer, and a loop of the second eddy current passes through the first insulating part,
• wherein a loop area of the first eddy current is less than a loop area of the second eddy current,
• wherein the shielding film is earthed and disposed on at least one side of the inductor coil,
• wherein the inductor coil is configured to generate the first electromagnetic field and the second electromagnetic field, and
• wherein
• the power supply is electrically connected to the inductor coil.