KR20200001040A - Panel for forming transmitting coil, wireless charger using the same and method thereof - Google Patents

Abstract

The present invention relates to a transmission coil forming panel, a wireless charging apparatus using the same and a method thereof. According to the present invention, a transmission coil forming panel includes a first structure in which a first n-type semiconductor is respectively stacked at upper/lower/left/right sides of the top surface (antenna layer) of a p-type semiconductor located on a circuit layer, and a second n-type semiconductor which is stacked on center of a lower surface of the p-type semiconductor, wherein the transmission coil forming panel has cells, where a second n-type semiconductor of a first structure and a second n-type semiconductor of a second structure are connected, arranged in a matrix form and has a structure where the cells are coupled to each other with a second structure having the same structure with the first structure and a conductor as media. The wireless charging apparatus measures charging efficiency of a portable terminal while forming a transmission coil by predetermined area on the transmission coil forming panel and measures charging efficiency of a portable terminal while forming a transmission coil having a plurality of patterns in an area where maximum charging efficiency is measured to detect an optimal transmission coil forming location, thereby maximizing charging efficiency of a portable terminal in charging the portable terminal. To this end, in a wireless charging apparatus using a transmission coil forming panel, the present invention includes: a transmission coil forming panel which forms transmission coils of various patterns; and a control unit which controls the transmission coil forming panel to form a transmission coil of a certain pattern and performs charging of a portable terminal by using the formed transmission coil of the certain pattern.

Description

Transmitting coil forming panel, wireless charging device using same and method thereof {PANEL FOR FORMING TRANSMITTING COIL, WIRELESS CHARGER USING THE SAME AND METHOD THEREOF}

The present invention relates to a transmitting coil forming panel, a wireless charging apparatus using the same, and a method thereof, and more particularly, to a technique of forming a transmitting coil in a position where the charging efficiency of a portable terminal is maximized on a panel of a cell array structure. .

For mobile communication and mobile terminals, wireless charging products using short-range wireless power transfer (WPT) for various mobile devices such as mobile phones, tablet PCs, laptops, and handheld terminals have been released.

Wireless power transmission system is largely divided into magnetic induction method and magnetic resonance method.

1 is a configuration diagram of a magnetic inductive coupling WPT system.

Magnetic induction works at close distances within a few cm. When time-varying current is applied to the transmitting coil, non-radial electromagnetic waves generated at the same frequency as the time-varying current generate induced current at the same frequency in the receiving coil. Magnetic induction method operated by 'Inductive Coupling' is easy to implement and has very good permeability to non-magnetic material, so it can be used in underground or underwater, but it has very short transmission distance and low degree of freedom in alignment between coils. There are disadvantages.

The magnetic induction method is commercially available for wireless charging technology of mobile devices according to the Qi regulations of the Wireless Power Consortium (WPC), and applied to the operation principle of traffic cards, RFID, and NFC systems, and one transmitting antenna for one receiving antenna. If the power transceiver is more than a few cm away or the transmission coil of the transmitting antenna and the receiving coil of the receiving antenna is not exactly the center, the wireless power transmission efficiency is lowered, there is a disadvantage that the charging efficiency and charging time increases.

In 2007, MIT Marin Soljacic's team applied a magnetic resonance method (Magnetic Resonance Method), which applied the principle of resonance, transmits power wirelessly to several meters, and the wireless power transmission distance is greatly increased compared to the magnetic induction method. In the magnetic resonance method, the resonant frequency of the primary coil and the resonant frequency of the secondary coil are made the same, the energy generated from the primary coil is transferred to the secondary coil, and in order to maintain the high Q-factor of the resonator, There is a disadvantage that the size of each coil of the resonant coil (primary coil) and the resonant coil (secondary coil) of the receiving antenna should be large.

2 is a block diagram of a magnetic resonant coupling WPT system. Magnetic resonance is operated by the magnetic resonant coupling between the transmitter and the receiver. In the case of a transmitting antenna, a magnetic field generated by a time-varying current applied from a source coil is applied to a resonance coil of the transmitting antenna by inductive coupling. In addition, magnetic resonant coupling occurs between the resonant coils of the transmitting antenna and the receiving antenna having the same resonant frequency, which induces an inductive coupling to the load coil and applies a current to the load. Magnetic resonance method can transmit power up to several meters distance than the magnetic induction method, it is possible to charge multiple terminals in one wireless charger body, even if the center of the coil is not exactly match.

Alliance for Wireless Power (A4WP), the United Nations of self-resonant wireless power transfer systems, has announced a system specification for Rezence Ver 1.0. The magnetic resonance wireless power transmission antenna operating at the specified frequency of 6.78 MHz in the Rezence standard is designed as a loop antenna having a plurality of turn structures, and the inductance and resistance of the resonance coil of the antenna Depending on the value, it has a matching element for a self-resonant frequency of 6.78 MHz. The maximum power transmission distance of the magnetic resonance wireless power transmission antenna can be about 8 times the radius of the resonance coil of the antenna, and power can be transmitted to a plurality of reception antennas by using one transmission antenna. The amount of power transmitted through the antenna is determined by the power input and the efficiency of the transmit / receive antenna.

On the other hand, in order to maximize charging efficiency, whether magnetic induction or magnetic resonance, alignment between the coil of the transmitter and the coil of the receiver is required. Therefore, the user must mount the portable terminal at a designated position on the wireless charging pad.

However, even if the user places the portable terminal at a designated position on the wireless charging pad, the position of the portable terminal may be changed due to an impact during charging, and each time the user must move the portable device to the designated position on the wireless charging pad. There is discomfort.

In order to solve this problem, a portable terminal on a wireless charging pad in a vehicle is sequentially moved to a plurality of reference positions, and an optimum charging position is detected on the wireless charging pad based on an induced voltage measured at each reference position. In addition, a wireless charging device having an automatic alignment function capable of charging a portable terminal while maintaining an optimal charging efficiency by moving the portable terminal to the optimal charging position has been proposed, but it is difficult to install a vehicle due to space limitations. There is this.

Korea Patent Registration No. 10-1704264

In order to solve the problems of the prior art as described above, the present invention measures the charging efficiency of the portable terminal while forming the transmission coil for each predetermined area on the transmission coil forming panel, a plurality of within the area where the maximum charging efficiency is measured Wireless charging apparatus and method using a transmission coil forming panel that can maximize the charging efficiency when charging the portable terminal by detecting the optimum forming position of the transmission coil by measuring the charging efficiency of the portable terminal while forming a transmission coil having a pattern The purpose is to provide.

In addition, according to the present invention, first n-type semiconductors are stacked on top, bottom, left, and right sides of an upper surface (antenna layer) of a p-type semiconductor positioned in a circuit layer, and a second n-type semiconductor is formed at the center of a lower surface of the p-type semiconductor. Matrix is formed by connecting a first structure having a stacked structure and a second structure having the same structure as that of the first structure, via a conductor, to the second n-type semiconductor of the first structure and the second n-type semiconductor of the second structure. Another object is to provide a transmission coil forming panel that is arranged in a shape and has an interconnected structure.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned above can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

An apparatus of the present invention for achieving the above object, the wireless charging device using a transmission coil forming panel, the transmission coil forming panel for forming a transmission coil of various patterns; And a controller configured to control the transmission coil forming panel to form a transmission coil having a specific pattern and to charge the portable terminal using the transmission coil having the specific pattern.

Here, the control unit may form a transmission coil for each area of the transmission coil forming panel to measure charging efficiency, and perform charging of the portable terminal using the transmission coil formed in the region where the charging efficiency is maximum. In this case, the controller may first form a transmission coil in a center region of the transmission coil forming panel.

In addition, the controller may perform charging of the portable terminal by using a transmission coil having a pattern in which the charging efficiency is maximized by measuring the charging efficiency while changing the pattern of the transmission coil in the region where the charging efficiency is maximum. In this case, the controller may first form a transmission coil centered on a center region of the region where the charging efficiency is maximum.

The control unit may further form a shielding structure in which a current flows in a direction opposite to a direction of a current flowing in the transmission coil around the transmission coil.

In the transmission coil forming panel, first n-type semiconductors are stacked on top, bottom, left, and right sides of a quadrangular p-type semiconductor, respectively, and a second n-type semiconductor is stacked on the bottom surface of the p-type semiconductor. First structure; A second structure in which first n-type semiconductors are stacked on top, bottom, left, and right sides of a quadrangular p-type semiconductor, respectively, and a second n-type semiconductor is stacked at the center of the bottom surface of the p-type semiconductor; And a control circuit for selectively applying power to the first structure and the second structure to form a transmission coil, wherein the second n-type semiconductor of the first structure and the second n-type semiconductor of the second structure include: The unit cells are interconnected to form a unit cell, and the unit cells are arranged in a matrix and have interconnected structures.

Here, the first structure of each cell serves as a transmission coil, and the second structure of each cell serves as an output terminal of a current flowing through the transmission coil.

The p-type semiconductor of the first structure is located in the circuit layer, and the first n-type semiconductor of the first structure is located in the antenna layer.

The method of the present invention for achieving the above object, in the wireless charging method using a transmission coil forming panel, the transmitting coil forming panel to form a transmission coil of a specific pattern; The control unit performs the charging of the portable terminal using the formed transmission coil of the specific pattern.

Here, the performing of the charging may include forming a transmission coil for each area of the transmission coil forming panel to measure charging efficiency; And a second step of charging the portable terminal using the transmission coil formed in the region where the charging efficiency is maximized. In this case, in the measuring of the charging efficiency, the transmission coil may be first formed in the center region of the transmission coil forming panel. In addition, the second step is a step 2-1 of measuring the charging efficiency while changing the pattern of the transmission coil in the region of the maximum charging efficiency; And a step 2-2 of charging the portable terminal using a transmission coil having a pattern in which charging efficiency is maximized. In this case, step 2-1 may first form a transmission coil centered on a center region of the region where the charging efficiency is maximum.

In addition, the method of the present invention may further comprise the step of forming a shielding structure in which the current flows in the opposite direction of the current flowing through the transmission coil in the vicinity of the transmission coil.

In another apparatus of the present invention, in the transmission coil forming panel, first n-type semiconductors are stacked on top, bottom, left, and right sides of a quadrangular p-type semiconductor, respectively, and in the center of a bottom surface of the p-type semiconductor. A first structure in which a second n-type semiconductor is stacked; A second structure in which first n-type semiconductors are stacked on top, bottom, left, and right sides of a quadrangular p-type semiconductor, respectively, and a second n-type semiconductor is stacked at the center of the bottom surface of the p-type semiconductor; And a control circuit for selectively applying power to the first structure and the second structure to form a transmission coil, wherein the second n-type semiconductor of the first structure and the second n-type semiconductor of the second structure include: The unit cells are interconnected to form unit cells, and the unit cells are arranged in a matrix and have interconnected structures.

Here, the first structure of each cell serves as a transmission coil, and the second structure of each cell serves as an output terminal of a current flowing through the transmission coil.

The p-type semiconductor of the first structure may be located in the circuit layer, and the first n-type semiconductor of the first structure may be located in the antenna layer.

The present invention as described above, by measuring the charging efficiency of the portable terminal while forming the transmission coil for each predetermined area on the transmission coil forming panel, and forming a transmission coil having a plurality of patterns in the region where the maximum charging efficiency is measured By measuring the charging efficiency of the portable terminal while detecting the optimum formation position of the transmission coil, there is an effect that can maximize the charging efficiency when charging the portable terminal.

In addition, the present invention provides a transmission coil forming panel capable of forming a transmission coil having a plurality of patterns, thereby eliminating the need for a plurality of transmission coils and moving the location of the portable terminal. Regardless, there is an effect that can maximize the charging efficiency.

1 is a configuration diagram of a magnetic inductive coupling WPT system;
2 is a block diagram of a magnetic resonant coupling WPT system,
3 is a plan view of an embodiment showing the structure of a unit cell constituting a transmission coil forming panel according to the present invention;
4 is a front view of an embodiment showing the structure of a unit cell constituting a transmission coil forming panel according to the present invention;
5 is an exemplary view showing the structure of a transmission coil forming panel according to the present invention;
6A and 6B are exemplary views for explaining a process of forming a transmission coil using the transmission coil forming panel according to the present invention;
7 is an exemplary view of a transmission coil generated using the transmission coil forming panel according to the present invention;
8 is a configuration diagram of an embodiment of a wireless charging apparatus using a transmission coil forming panel according to the present invention;
9 is an exemplary view illustrating a process of forming a transmission coil according to the present invention;
10 is an exemplary view of a transmission coil and a shielding structure formed by the wireless charging device according to the present invention;
11 is a flowchart illustrating an embodiment of a wireless charging method using a transmission coil forming panel according to the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiments of the present invention, if it is determined that the detailed description of the related well-known configuration or function disturbs the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

3 is a plan view showing an example of a structure of a unit cell constituting a transmission coil forming panel according to the present invention. In the actual plan view, the second structure 320 is hidden by the first structure 310, but is shown for clarity. Shown together. That is, the first structure 310 and the second structure 320 have the same structure (size, shape, material, etc.).

As shown in FIG. 3, the unit cell constituting the transmission coil forming panel according to the present invention includes a first structure 310 and a second structure 320.

In the first structure 310, first n-type semiconductors are stacked on top, bottom, left, and right sides of a quadrangular p-type semiconductor, and a second n-type semiconductor is stacked on a center of the bottom surface of the p-type semiconductor. Has a structure. In this case, the first n-type semiconductor located on the left side of the first structure 310 is connected to the first n-type semiconductor located on the right side of the other structure through the conductor 311 in the panel configuration, and the right side of the first structure 310. The first n-type semiconductor located at is connected to the first n-type semiconductor located at the left side of the other structure through the conductor 312 in the panel configuration, and the first n-type semiconductor located at the upper side of the first structure 310 is the panel configuration. The first n-type semiconductor located below the other structure is connected through the visual conductor 313, and the first n-type semiconductor located below the first structure 310 is connected to the first n-type semiconductor through the conductor 314 in the panel configuration. It is connected to the first n-type semiconductor located on the upper side.

The second structure 320 also has the same structure as the first structure 310, but as shown in FIG. 4, the second structure 320 is rotated 180 degrees with respect to the horizontal line to form a unit cell. The second n-type semiconductor of the second structure 320 is connected to the second n-type semiconductor of the first structure 310. In this case, the first n-type semiconductor located on the left side of the second structure 320 is connected to the first n-type semiconductor located on the right side of the other structure through the conductor 321 in the panel configuration, and the right side of the second structure 320. The first n-type semiconductor located at is connected to the first n-type semiconductor located at the left side of the other structure through the conductor 322 in the panel configuration, and the first n-type semiconductor located at the upper side of the second structure 320 is the panel configuration. The first n-type semiconductor is disposed below the other structure through the visual conductor 323, and the first n-type semiconductor located below the second structure 320 is connected to the other n through the conductor 324 in the panel configuration. It is connected to the first n-type semiconductor located on the upper side.

Here, each of the conductors 311 to 314 and 321 to 324 serves as a bridge, and each p-type semiconductor serves as a gate.

4 is a front view illustrating an example of a structure of a unit cell constituting a transmission coil forming panel according to an embodiment of the present invention, in which a conductor 314 connected to a first n-type semiconductor of a first structure 310 is formed on an actual front view, and FIG. The conductor 324 connected to the first n-type semiconductor of the structure 320 should be shown but is not shown for ease of understanding.

As shown in FIG. 4A, the first n-type semiconductor is stacked on the left side of the upper surface of the p-type semiconductor located on the circuit layer of the first structure 310, and the first n-type semiconductor is stacked on the right side of the p-type semiconductor. That is, the first n-type semiconductor is located in the antenna layer. In this case, the circuit layer means a layer in which a line to which a power supply Vcc is selectively supplied from a control circuit (control unit) is located.

The second structure 320 serves as an output terminal of the current on the planar panel. That is, in order to form a transmission coil, a current must be inputted to an input terminal and output at an output terminal, and the second structure 320 plays this role.

The second n-type semiconductor stacked on the center of the lower surface of the first structure 310 is stacked on the lower surface of the second structure 320 (currently, the second structure 320 is rotated 180 degrees with respect to the horizontal line). The second n-type semiconductor and the conductor 410.

As shown in FIG. 4B, when a power source Vcc is applied to the P-type semiconductor, current flows between the bridges. Since this is the basic principle of the npn type transistor, a detailed description thereof will be omitted. Here, the point where the power supply (Vcc) is applied to the P-type semiconductor can be changed according to the designer's intention.

5 is an exemplary view showing the structure of a transmission coil forming panel according to the present invention.

As shown in FIG. 5, the transmission coil forming panel according to the present invention has a structure in which unit cells are arranged in a matrix and each cell is interconnected. In this case, the control circuit 510 may selectively apply power to a specific cell. Therefore, the transmission coil can be formed.

In FIG. 5, for the sake of understanding, a transmission coil forming panel having a 3 × 4 structure has been described as an example. However, the number of cells constituting the transmission coil forming panel may be determined according to a designer's intention and may not affect the present invention. Do not.

6A and 6B are exemplary views for explaining a process of forming a transmission coil using the transmission coil forming panel according to the present invention.

As shown in Fig. 6A, an identification number is assigned to each cell of the transmission coil forming panel, and (0,0), (0,1), (0, ...), (0, N), (N, 0). When power is applied to (N, 1), (N, ...), (N, N), (1, N), (..., N), a transmission coil as shown in FIG. 6B is formed.

7 illustrates an example of a transmission coil generated by using the transmission coil forming panel according to the present invention. Although only the first structure 310 is displayed, a second structure 320 is provided on a rear surface thereof.

A power supply was applied to a specific cell to form a transmission coil as shown in FIG. 7, and power was applied to the second structure 310 of the destination cell 720 to start from the first structure 310 of the start cell 710. The current flows to the first structure 310 of the terminal cell 720. That is, current flows through the transmission coil.

8 is a configuration diagram of an embodiment of a wireless charging device using a transmission coil forming panel according to the present invention.

As shown in FIG. 8, the wireless charging apparatus using the transmission coil forming panel according to the present invention may include a transmission coil forming panel 810, a communication unit 820, and a controller 830. According to the method of implementing the present invention, each component may be combined with each other and provided as one, and some of the components may be omitted according to the method of practicing the invention.

Referring to each of the above components, first, the transmission coil forming panel 810 has a structure as shown in FIG. 5, and may form various types of transmission coils under the control of the controller 830.

The communication unit 820 communicates with the portable terminal to be charged through short-range wireless communication (for example, Bluetooth communication). That is, the communication unit 820 may obtain various information generated in the charging process from the portable terminal. In particular, the communication unit 820 may obtain various types of data for charging efficiency information or charging efficiency measurement of the portable terminal.

The controller 830 performs overall control so that each of the above components can normally perform its function. The controller 830 may be implemented in the form of hardware or software, or may be present in a combination of hardware and software. Preferably, the controller 830 may be implemented as a microprocessor, but is not limited thereto.

In addition, the controller 830 divides the area of the transmission coil forming panel 810 into a predetermined number to form a transmission coil optimized for the position of the portable terminal mounted on the transmission coil forming panel 810, and then each area. Measure the charging efficiency. That is, as shown in FIG. 9, the transmission coil forming panel 810 is divided into three regions ①, ②, and ③, and the charging efficiency is sequentially measured. At this time, since the portable terminal is usually mounted on the center portion of the transmission coil forming panel 810, it is preferable to determine the center portion of the transmission coil forming panel 810 as the region ①.

Thereafter, the controller 830 measures the charging efficiency of the portable terminal while forming a transmission coil having a plurality of patterns to adjust the detailed position of the transmission coil in the region where the maximum charging efficiency is measured. That is, as shown in FIG. 9, when the area where the maximum charging efficiency is measured is the ② area, the ② area is divided into six equal parts (2.1, 2.2, 2.3, 2.4, 2.5, 2.6) as an example, and the center of the transmission coil is sequentially Transmitting coil to form a transmission coil and measuring the charging efficiency each time to determine the transmission coil having the maximum charging efficiency. At this time, the first operation is performed in the 2.1 area where the portable terminal is most likely located.

In more detail, after generating a transmission coil so that the (1,1) cell of the 2.1 region becomes the center of the transmission coil, the charging efficiency is measured, and then the transmission is performed so that the (1,2) cell is the center of the transmission coil. After generating the coil, the charging efficiency is measured. The scan line showing the order is as shown in FIG. In this case, the scanline may be implemented in various ways according to the designer's intention. That is, it may be performed only in odd columns, only odd rows, and may be extended to neighboring cells starting from the center cell of region 2.1.

Through this process, the controller 830 may form a transmission coil having a maximum charging efficiency.

On the other hand, the control unit 830 may further form a shielding structure around the transmission coil as shown in FIG. At this time, the shielding structure is reversed in the direction of the current flowing through the transmission coil. Such a shielding structure has an effect of reducing lateral noise.

11 is a flowchart illustrating an embodiment of a wireless charging method using a transmission coil forming panel according to the present invention.

First, the transmission coil forming panel 810 forms a transmission coil of a specific pattern (1101).

Thereafter, the controller 830 performs charging of the portable terminal using the formed transmission coil of the specific pattern (1102).

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

310: first structure
320: second structure
810 Transmission coil forming panel
820: communication unit
830 control unit

Claims (18)

A transmission coil forming panel forming a transmission coil of various patterns; And
Control unit for controlling the transmission coil forming panel to form a transmission coil of a specific pattern, and charging the portable terminal using the transmission coil of the specific pattern formed
Wireless charging device comprising a.
The method of claim 1,
The control unit,
Wireless charging apparatus, characterized in that for forming the transmission coil for each area of the transmission coil forming panel to measure the charging efficiency, and to charge the portable terminal using the transmission coil formed in the region of the maximum charging efficiency.
The method of claim 2,
The control unit,
Wireless charging device, characterized in that to form the first transmission coil in the center region of the transmission coil forming panel.
The method of claim 2,
The control unit,
Wireless charging apparatus, characterized in that the charging efficiency is measured by changing the pattern of the transmission coil in the region of the maximum charging efficiency by using the transmission coil of the pattern to maximize the charging efficiency.
The method of claim 4, wherein
The control unit,
Wireless charging device characterized in that the first forming the transmission coil centered on the center of the area of the maximum charging efficiency.
The method of claim 1,
The control unit,
And a shielding structure in which a current flows in a direction opposite to a direction of a current flowing through the transmission coil in the vicinity of the transmission coil.
The method of claim 1,
The transmission coil forming panel,
A first structure in which first n-type semiconductors are stacked on top, bottom, left, and right sides of a quadrangular p-type semiconductor, and a second n-type semiconductor is stacked in the center of the bottom surface of the p-type semiconductor;
A second structure in which first n-type semiconductors are stacked on top, bottom, left, and right sides of a quadrangular p-type semiconductor, respectively, and a second n-type semiconductor is stacked at the center of the bottom surface of the p-type semiconductor; And
A control circuit for selectively applying power to the first structure and the second structure to form a transmission coil,
Wireless charging, characterized in that the second n-type semiconductor of the first structure and the second n-type semiconductor of the second structure are interconnected to form a unit cell, the unit cells are arranged in a matrix form and have an interconnected structure. Device.
The method of claim 7, wherein
The first structure of each cell serves as a transmission coil, the second structure of each cell serves as an output terminal of the current flowing through the transmission coil.
The method of claim 7, wherein
And the p-type semiconductor of the first structure is located in the circuit layer, and the first n-type semiconductor of the first structure is located in the antenna layer.
Forming a transmission coil of a specific pattern by the transmission coil forming panel;
Performing charging by the controller using the transmission coil of the specific pattern;
Wireless charging method comprising a.
The method of claim 10,
Performing the charging,
A first step of measuring a charging efficiency by forming a transmission coil for each area of the transmission coil forming panel; And
The second step of charging the portable terminal using the transmission coil formed in the region of the maximum charging efficiency
Wireless charging method comprising a.
The method of claim 11,
Measuring the charging efficiency,
Wireless charging method, characterized in that to form the first transmission coil in the center region of the transmission coil forming panel.
The method of claim 11,
The second step,
A second step of measuring charging efficiency while changing a pattern of a transmission coil in a region where the charging efficiency is maximum; And
Step 2-2 of performing charging of the portable terminal using a transmission coil having a pattern of maximum charging efficiency
Wireless charging method comprising a.
The method of claim 13,
The second step 1-1,
Wireless charging method characterized in that the first to form a transmission coil centered on the center of the area of the maximum charging efficiency.
The method of claim 10,
Forming a shielding structure in which the current flows in a direction opposite to the direction of the current flowing in the transmission coil, around the transmission coil;
Wireless charging method further comprising.
A first structure in which first n-type semiconductors are stacked on top, bottom, left, and right sides of a quadrangular p-type semiconductor, and a second n-type semiconductor is stacked in the center of the bottom surface of the p-type semiconductor;
A second structure in which first n-type semiconductors are stacked on top, bottom, left, and right sides of a quadrangular p-type semiconductor, respectively, and a second n-type semiconductor is stacked at the center of the bottom surface of the p-type semiconductor; And
A control circuit for selectively applying power to the first structure and the second structure to form a transmission coil,
And a second n-type semiconductor of the first structure and a second n-type semiconductor of the second structure are interconnected to form a unit cell, wherein the unit cells are arranged in a matrix form and have a interconnected structure.
The method of claim 16,
And a first structure of each cell serves as a transmission coil, and a second structure of each cell serves as an output terminal of a current flowing through the transmission coil.
The method of claim 16,
And the p-type semiconductor of the first structure is located in the circuit layer, and the first n-type semiconductor of the first structure is located in the antenna layer.

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