Stacked coil structure and electronic device including the same
地域：
Suwon-si
摘要
An electronic device is provided. The electronic device includes a coil unit, a power transmission circuit electrically connected to the coil unit, and a control circuit configured to wirelessly transmit power using the coil unit, and the coil unit may include a first coil. The first coil may include a first layer wound in a first shape by a first number of turns, and a second layer extending from the first layer and wound in a second shape by a second number of turns, and the second layer may be disposed above the first layer to overlap the first layer.
說明書
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This application is based on and claims priority under 35 U.S.C. 119(a) of a Korean patent application number 10-2018-0074039, filed on Jun. 27, 2018, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety.
The disclosure relates to a coil structure and an electronic device including the coil structure. More particularly, the disclosure relates to an arrangement structure between coils for wireless power transmission and an electronic device including the arrangement structure.
Recently, with the rapid development of information communication technology, a society based on information communication technology is being formed. In addition, in an information-based society, the importance of sensors embedded in electronic devices and power supply problems is increasingly emphasized in order for information communication devices to operate and connect with each other regardless of time or place.
Generally, as the types of mobile devices such as mobile phones have been rapidly diversified, the operation of charging the batteries of mobile devices requires users' time and labor. As a way to solve this problem, wireless power transmission technology has recently attracted attention. For example, a wireless power reception device, such as a mobile device that receives energy wirelessly, may be driven by the received wireless power, or may be driven using power, which has been charged to a battery using the received wireless power.
權(quán)利要求
What is claimed is:1. An electronic device comprising:a coil unit; a power transmission circuit electrically connected to the coil unit; and a control circuit configured to wirelessly transmit power using the coil unit, wherein the coil unit includes a first coil and a second coil, wherein the first coil includes:a first layer including a first helical wire wound in a first shape by a first number of turns, and a second layer including a second helical wire extending from the first layer and wound in a second shape by a second number of turns, the second layer being disposed above the first layer to overlap the first layer, wherein the second coil includes a third helical wire wound in a third shape by a third number of turns, wherein the third shape includes a third layer disposed to be substantially coplanar with the second layer, and wherein a diameter of the first helical wire forming the first layer or the second helical wire forming the second layer differs from a diameter of the third helical wire forming the third layer. 2. The electronic device of claim 1 , wherein the first shape of the first layer and the second shape of the second layer include a shape of a part of at least one of a circle, an ellipse, or a polygon. 3. The electronic device of claim 2 ,wherein the first number of turns of the first layer is larger than the second number of turns of the second layer, and wherein a diameter of the helical wire forming the first layer corresponds to a diameter of the helical wire forming the second layer. 4. The electronic device of claim 2 ,wherein an outer diameter of the first layer is larger than an outer diameter of the second layer, and an inner diameter of the first layer is larger than an inner diameter of the second layer, and wherein a central axis of the first layer and a central axis of the second layer are arranged on a same line. 5. The electronic device of claim 2 , wherein at least a portion of the second layer is configured to be exposed inside a central opening of the first layer when viewed from above the first layer. 6. An electronic device comprising:a coil unit; a power transmission circuit electrically connected to the coil unit; and a control circuit configured to wirelessly transmit power using the coil unit, wherein the coil unit includes:a first coil including a first helical wire wound in a first shape by a first number of turns, the first shape including a first layer and a second layer having an area narrower than the area of the first layer, and a second coil including a second helical wire wound in a second shape by a second number of turns, the second coil being disposed above the first layer to overlap at least a portion of the first layer, wherein the second shape includes a third layer disposed to be substantially coplanar with the second layer, and wherein a diameter of the helical wire forming the first layer or the second layer differs from a diameter of the helical wire forming the third layer. 7. The electronic device of claim 6 ,wherein the second shape including a third layer and a fourth layer having an area wider than an area of the third layer, and wherein the second layer and the fourth layer are substantially coplanar with each other. 8. The electronic device of claim 7 , wherein the fourth layer is disposed above the first layer to overlap at least a portion of the first layer. 9. The electronic device of claim 6 ,wherein the first layer, the second layer, and the third layer include a shape of a part of at least one of a circle, an ellipse, or a polygon. 10. The electronic device of claim 9 ,wherein the first number of turns of the first layer is larger than the second number of turns of the second layer, wherein a region adjacent to an inner diameter of the first layer is disposed to overlap the second layer, and a region adjacent to an outer diameter of the first layer is disposed to overlap the third layer. 11. The electronic device of claim 6 , wherein the second coil includes a coil based on a wireless power consortium (WPC) standard. 12. The electronic device of claim 10 ,wherein the outer diameter of the third layer is larger than an outer diameter of the first layer, and the inner diameter of the third layer is larger than an outer diameter of the second layer, and wherein the second layer is disposed to be embedded inside an inner diameter of the third layer. 13. The electronic device of claim 12 ,wherein the outer diameter of the first layer is larger than the outer diameter of the second layer, and an inner diameter of the first layer is larger than an inner diameter of the second layer, and wherein a central axis of the first layer, a central axis of the second layer, and a central axis of the third layer are arranged on a same line. 14. The electronic device of claim 6 , further comprising:a housing including a power transmission region disposed therein, wherein the power transmission region includes a first region facing the first coil and a second region facing the second coil, and wherein the first region and the second region are for wirelessly charging different devices. 15. The electronic device of claim 14 , further comprising:a shielding member disposed to face the power transmission region with respect to the coil unit, and configured to shield a magnetic field generated from the coil unit such that the magnetic field is not directed to an inside of the housing. 16. The electronic device of claim 8 ,wherein a central axis of the first layer and a central axis of the second layer are arranged on a same line, wherein a central axis of the third layer and a central axis of the fourth layer are arranged on a same line, and wherein the central axis of the first layer and the central axis of the third layer are arranged on a same line. 17. An electronic device comprising:a power transmission circuit configured to generate power; and a coil assembly electrically connected to the power transmission circuit and configured to wirelessly transmit the power, wherein the coil assembly includes:a first coil module including a first helical wire forming a first coil wound by a first number of turns, and a second helical wire forming a second coil wound by a second number of turns smaller than the first number of turns, the second coil being electrically connected to the first coil and disposed above the first coil, and a second coil module including a third helical wire forming a third coil wound by a third number of turns and disposed above the first coil adjacent to the second coil, a portion of the third coil overlapping the first coil, and a fourth helical wire forming a fourth coil wound by a fourth number of turns smaller than the third number of turns, the fourth coil being electrically connected to the third coil and disposed below the third coil adjacent to the first coil, and wherein a diameter of the first helical wire forming the first coil or the second helical wire forming the second coil differs from a diameter of the third helical wire forming the third coil or the fourth helical wire forming the fourth coil. 18. The electronic device of claim 17 ,wherein the first coil and the fourth coil are substantially coplanar with each other, and wherein the second coil and the third coil are substantially coplanar with each other. 19. The electronic device of claim 17 , wherein the coil assembly further includes a third coil module including a fifth coil wound by a fifth number of turns and disposed adjacent the fourth coil, a portion of the fifth coil overlapping the third coil, and a sixth coil wound by a sixth number of turns smaller than the fifth number of turns, the sixth coil being electrically connected to the fifth coil and disposed above the fifth coil adjacent to the third coil. 20. The electronic device of claim 17 , further comprising a sensor configured to sense a wireless power reception device.
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