Wireless charging apparatus and electronic apparatus including the same
There are provided a wireless charging apparatus and an electronic apparatus including the same, and more particularly, a wireless charging apparatus in which a wireless charging coil is integrally formed with a case and an electronic apparatus including the same, the wireless charging apparatus including a case forming an exterior of a product and containing a magnetic powder, and a coil pattern formed on an outer surface of the case.
1. A wireless charging apparatus, comprising:
a case forming an exterior of a product, containing a magnetic powder and providing a magnetic circuit of a magnetic field;
a coil pattern formed on an outer surface of the case, in which a voltage is induced according to a change in the magnetic field generated by a contactless power transmitting apparatus;
a contact pad disposed on an inner surface of the case and electrically connected to the coil pattern; and
a via penetrating through the case and connecting the coil pattern and the contact pad to each other.
2. The wireless charging apparatus of claim 1 , wherein the coil pattern is formed on the case by one of a sputtering method, a screen printing method, a metal foil transfer method, and a gravure printing method.
3. The wireless charging apparatus of claim 1 , wherein the coil pattern is formed by filling a pattern-shaped groove formed in the outer surface of the case.
4. The wireless charging apparatus of claim 1 , wherein the magnetic powder contained in the case is a metal magnetic flake or a ferrite powder.
5. The wireless charging apparatus of claim 1 , wherein the magnetic powder contained in the case is a metallic soft magnetic powder having a flake shape.
6. The wireless charging apparatus of claim 1 , wherein the magnetic powder contained in the case includes at least one of FeCrSiAI-based corrosion resistant steel, FeSi silicon steel, stainless magnetic steel, FeCuNbSiB nano-crystalline alloy, and FeSiAI-based sendust.
7. The wireless charging apparatus of claim 1 , wherein the case includes:
a first case formed of a resin material and having a receiving space; and
a second case coupled to the first case, including a magnetic powder, and having the coil pattern formed on an outer surface thereof.
8. The wireless charging apparatus of claim 1 , further comprising a magnetic sheet disposed on an inner surface of the case and supplementing magnetism of the case.
9. The wireless charging apparatus of claim 1 , further comprising a metal sheet disposed on an inner surface of the case and shielding electromagnetic waves and leakage flux.
10. The wireless charging apparatus of claim 1 , further comprising an insulating film applied to an outer surface of the coil pattern and formed to have the same color as the case.
11. The wireless charging apparatus of claim 1 , further comprising an insulating protective layer having the same color as the case and attached to the case so as to entirely cover the coil pattern.
12. An electronic apparatus, comprising:
a wireless charging apparatus including a case forming an exterior of a product, containing a magnetic powder and providing a magnetic circuit forming a magnetic field; a coil pattern formed on an outer surface of the case, in which a voltage is induced according to a change in the magnetic field generated by a contactless power transmitting apparatus; a contact pad disposed on an inner surface of the case and electrically connected to the coil pattern; and a via penetrating through the case and connecting the coil pattern and the contact pad to each other; and
a battery electrically connected to the coil pattern of the wireless charging apparatus to store the voltage induced to the coil pattern.