KR20180079818A - Wireless charging and nfc device and a table including the same - Google Patents

Abstract

A wireless charging table according to the present invention includes a wireless charging device composed of an insertion port into which an electronic device is inserted and a magnetic induction transmission coil for wirelessly charging the electronic device by generating an induction current in a reception coil of the electronic device. The injection port of the wireless charging device is located on the upper side of the wireless charging table. Accordingly, the space availability of the wireless charging table can be improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless charging apparatus and an NFC apparatus,

The present invention relates to a wireless charging device.

The present invention relates to a table comprising a wireless charging device.

Recently, electronic devices such as a smart phone, a tablet, and a wearable device can be charged without electric wires by using wireless power transfer technology. Wireless charging refers to the technique of charging an electronic device by placing it on a charging pad instead of connecting it to a separate charging adapter or power cable.

Specifically, the methods used for wireless charging include a magnetic induction (MI) method, a magnetic resonance (MR) method, and a long distance microwave method. Currently, the technologies that are mainly used for wireless charging technology are magnetic induction type and self resonance type. Each technique will be described in detail as follows.

The magnetic induction method utilizes the magnetic induction phenomenon between the primary coil and the secondary coil of the transformer. According to the magnetic induction method, the charging efficiency is good. In addition, almost no electromagnetic waves are generated, which is harmless to the human body. On the other hand, when using the magnetic induction method, the coils must be located at a close distance to enable wireless charging. Specifically, the coils must be located at a short distance of several millimeters to several centimeters to enable wireless charging. In addition, there is a problem that the coherence of the coils is very sensitive. Wireless power consortium (WPC) is a group established for collective standardization and promotion of wireless charging, and currently adopts magnetic induction wireless power transmission technology between 110kHz and 190kHz as standard.

The self-resonance method uses magnetic resonance phenomenon by using frequencies of several MHz to several tens MHz. Compared with the magnetic induction method, power transmission is possible at a long distance, and power transmission of several tens cm to several meters can be performed depending on the size and characteristics of the resonant transmitting and receiving coils. Further, since the degree of freedom of position of the receiving coil is very high, power can be received regardless of the position of the charging device within a short time. On the other hand, the charging efficiency is lower than that of the magnetic induction type. A4WP (Alliance for wireless power) is a self-resonating wireless charging association, currently adopting 6.78MHz resonant mode wireless power transmission technology. In this case, since the operating frequency of the short-range wireless communication (NFC) operating at 13.56 MHz and the A4WP are sieve-related, frequency interference occurs when the two systems are close to each other. If interference occurs, the power transmission efficiency of the A4WP system may be reduced.

On the other hand, since WPC and A4WP wireless charging standard adopts different wireless charging methods, there is a limit to the rechargeable receiver because it can not be charged except the receiver using the charging method. For example, a receiver using a magnetic induction method can not be charged through the A4WP wireless charge transmitter.

In recent years, the use of NFC (Near Field Communication) is increasing as a short-range wireless communication technology. NFC communication technology is one of radio frequency identification (RFID) technologies and is a contactless communication technology using the frequency band of 13.56MHz. It is a short distance communication technology with relatively low security and relatively low cost. It is possible to use both data read and write functions, and it is unnecessary to set between devices for communication. NFC operation principle is based on electromagnetic induction phenomenon. That is, as a coil-shaped antenna approaches, a magnetic field is formed, and communication is performed by using the generated current.

An object of the present invention is to provide a wireless charging device and a table including the same, which are convenient to use and have high space utilization.

The present invention provides a wireless charging device with high charging efficiency and a table including the same.

The present invention provides a wireless charging device that supports different wireless charging schemes and a table including the same.

The present invention provides a wireless charging device capable of simultaneously charging a plurality of electronic devices and a table including the same.

The present invention provides a table that supports and includes an A4WP wireless charging device and an NFC device.

The wireless charging table according to the embodiment of the present invention includes a wireless charging device composed of an injection port for inserting an electronic device and a magnetic induction transmission coil for generating an induction current in a receiving coil of the electronic device to wirelessly charge the electronic device, The filling port of the wireless charging device may be formed to be positioned on the upper surface of the wireless recharging table.

In the wireless charging table according to the embodiment of the present invention, the wireless charging apparatus may further include a fixing unit fixing the electronic device to align the alignment coil of the reception coil of the electronic device and the magnetic induction transmission coil.

In the wireless charging table according to the embodiment of the present invention, the wireless charging device may further include a self-resonant transmission coil for generating a resonance phenomenon to wirelessly charge the electronic device.

In the wireless charging table according to the embodiment of the present invention, the wireless charging device may further include a nearfield communication (NFC) transmission coil.

In the wireless charge table according to the embodiment of the present invention, the NFC transmit coil may be located at the edge of the self-resonant transmit coil.

In the wireless charging table according to the embodiment of the present invention, a charging space may be formed in the wireless charging device such that the electronic device is positioned inside the wireless charging table as the electronic device is inserted in the longitudinal direction through the injection port.

In the wireless charging table according to the embodiment of the present invention, the wireless charging device may wirelessly charge a plurality of electronic devices simultaneously including a plurality of injection ports and a magnetic induction transmission coil.

In the wireless charging table according to the embodiment of the present invention, the wireless charging device is formed in a letter 'A' shape, the magnetic induction transmission coil is located on the longitudinal surface of the wireless charging device, Lt; / RTI >

According to the embodiment of the present invention, it is possible to prevent the use of the space from being hindered by the electronic equipment being charged.

According to the embodiment of the present invention, the charging can be completed in a short time using the wireless charging device.

According to the embodiment of the present invention, a single wireless charging device can support a plurality of wireless charging standards.

According to the embodiment of the present invention, there is an effect that a plurality of electronic apparatuses can be wirelessly charged with one wireless charging authority.

According to the embodiment of the present invention, the NFC transmission coil is positioned at the edge of the A4WP transmission coil to minimize the interference effect of the two transmission coils, thereby minimizing the reduction of the wireless charging efficiency of the A4WP system.

1 is a view for explaining a method of charging an electronic device using a conventional wireless charging device.
2 is a diagram for explaining a method of charging an electronic device using a table including a conventional wireless charging device.
3 is an example of a wireless charging device according to the first embodiment of the present invention.
4 is a view for explaining the internal structure of the wireless charging apparatus according to the first embodiment of the present invention.
5 is a view for explaining a charging method of an electronic device through a wireless charging device according to the first embodiment of the present invention.
6 is a left side view of the wireless charging apparatus according to the first embodiment of the present invention.
7 is a view for explaining a wireless charging table including a wireless charging device according to the first embodiment of the present invention.
8 to 9 are views for explaining a wireless charging apparatus according to a second embodiment of the present invention.
10 is a left side view of a wireless charging device according to a second embodiment of the present invention.
11 is a view for explaining a wireless charging apparatus according to a third embodiment of the present invention.
12 is a diagram for explaining a wireless charging table including a wireless charging device according to a third embodiment of the present invention.

Hereinafter, embodiments related to the present invention will be described in detail with reference to the drawings. The suffix " part " for the constituent elements used in the following description is given or confused with consideration only for ease of specification, and does not have a meaning or role that is different from itself.

The terms used below are for the purpose of illustrating the present invention and are not intended to limit the present invention. As used herein, the singular forms " a " include plural forms unless the context clearly dictates otherwise. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

All terms including technical terms and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Commonly used predefined terms are further interpreted as having a meaning consistent with the present disclosure in conjunction with the relevant technical literature and are not to be construed as ideal or very formal unless defined to the contrary.

Hereinafter, a wireless charging apparatus and a table including the wireless charging apparatus according to preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Hereinafter, a case where the wireless charging device and the electronic device wirelessly charged by the table including the wireless charging device according to the embodiment of the present invention are mobile terminals will be described. However, this is for illustrative purposes only and the present invention is not limited thereto.

First, with reference to FIG. 1 and FIG. 2, a method of charging an electronic device using a conventional wireless charging device and a table including the same will be described.

More specifically, FIG. 1 is a diagram for explaining a method of charging an electronic device using a conventional wireless charging device. 2 is a diagram for explaining a method of charging an electronic device using a table including a conventional wireless charging device.

Conventionally, as shown in FIG. 1, the electronic device 100 can be charged without connecting wires to the electronic device 100 by placing the electronic device 100 on the conventional wireless charging device 101. Alternatively, as shown in FIG. 2, the electronic device 100 can be charged by placing the electronic device 100 on the table 200 having the wireless charging device 101 therein.

The charging principle may be a magnetic induction type or a self resonance type.

First, the principle of charging by the magnetic induction method will be described. Conventional wireless charging device 101 may include a primary (transmission) coil. When the conventional wireless charging device 101 is connected to a power source, a magnetic field may occur in the primary coil. The electronic device 100 may include a secondary (receiving) coil. In the secondary coil, induced current is generated by the magnetic field generated in the primary coil. The battery of the electronic device 100 is charged by the induced current generated in the secondary coil. Since the magnetic field generated in this case is weak, charging can be performed when the wireless charging device 101 and the electronic device 100 are located at a very close position.

Next, the principle of charging by the self-resonance (magnetic resonance) method will be described. The conventional wireless charging device 101 and the electronic device 100 transmit and receive power using the same frequency. That is, a magnetic field that oscillates at a resonant frequency is generated in the primary (transmission) coil incorporated in the conventional wireless charging device 101. The secondary (reception) coil incorporated in the electronic device 101 is designed to have the same resonance frequency as the magnetic field generated in the primary coil, and can receive energy. In this case, charging is possible even at a relatively long distance.

However, since the electronic device 100 is placed on the table 200 including the wireless charging device 101 or the wireless charging device 101 as shown in FIGS. 1 and 2, . Specifically, in the case of FIG. 1, the electronic device 100 and the wireless charging device 101 occupy some space. In the case of FIG. 2, there is a problem that the electronic device 100 occupies one area on the table 200, so that not all of the table can be used.

Accordingly, it is an object of the present invention to provide a wireless charging device and a table including the wireless charging device.

3 is an example of a wireless charging device according to the first embodiment of the present invention.

The wireless charging apparatus 1000 may be composed of a coil cover 1001 and an injection port 1002. Specifically, the wireless charging apparatus 1000 according to the first embodiment of the present invention includes one injection port 1002, so that one electronic apparatus can be wirelessly charged.

The coil cover 1001 can be detachably attached so that the transmission coil can be installed inside the wireless charging device 1000. The coil cover 1001 may be parallel to a position close to the charging position of the electronic apparatus. Specifically, the coil cover 1001 can be configured to be positioned in parallel with the electronic apparatus inserted through the injection port 1002. [

The inlet 1002 may be an inlet through which the electronic device is inserted into the wireless charging device 1000. The electronic device can be located inside the wireless charging device 1000 through the inlet 1002. [

4 is a view for explaining the internal structure of the wireless charging apparatus according to the first embodiment of the present invention.

4, the wireless charging apparatus 1000 may include fixed portions 1004a and 1004b, a charging space 1003, and a transmission coil (not shown) in addition to the coil cover 1001 and the injection port 1002 have.

The coil cover 1001 and the injection port 1002 are as described above.

The fixing portions 1004a and 1004b serve to align the alignment between the transmission coil of the wireless charging device 100 and the reception coil of the electronic device. Specifically, when the radio is charged through the magnetic induction method, the alignment between the transmission coil and the reception coil must be matched so that the charging efficiency is high. Therefore, the fixing portions 1004a and 1004b fix the electronic device to align the alignment of the transmission coil and the reception coil. The fixing portions 1004a and 1004b may be composed of a first fixing portion 1004a for fixing one side of the electronic device and a second fixing portion 1004b for fixing the other side of the electronic device. The fixing portions 1004a and 1004b may be constructed of springs. As described above, the fixing portions 1004a and 1004b have an effect of increasing the efficiency of wireless charging by aligning the alignment between the transmission coil and the reception coil.

The charging space 1003 may refer to a space where the electronic equipment being charged is located. The electronic device may be inserted into the filling space 1003 through the injection port 1002. The electronic apparatus inserted in the charging space 1003 can be fixed by the fixing portions 1004a and 1004b. More specifically, the fixing portions 1004a and 1004b can fix the receiving coil in the electronic device and the transmission coil alignment of the wireless charging device at the correct positions.

The transmission coil (not shown) may be located between the charging space 1003 and the coil cover 1001. The transmission coil can be installed at a position adjacent to the charging space 1003 in a state where the coil cover 1001 is detached. The transmission coil can generate an induction current in the reception coil of the electronic device to charge the electronic device.

5 is a view for explaining a charging method of an electronic device through a wireless charging device according to the first embodiment of the present invention.

As shown in FIG. 5, the electronic device 100 may be located in the charging space 1003. The electronic apparatus 100 can be fixed to the region where the transmission coil and the alignment match by the fixing portions 1004a and 1004b. As described above, by inserting the electronic device 100 into the wireless charging apparatus 1000, it is easy to use and at the same time, the charging efficiency can be increased.

6 is a left side view of the wireless charging apparatus according to the first embodiment of the present invention.

As shown in FIG. 6, the rear surface of the wireless charging apparatus 1000 may be formed of a coil cover 1001. The transmitting coil 1005 may be positioned inside the coil cover 1001. [ The transmission coil 1005 can be installed by attaching and detaching the coil cover 1001. The reason why the coil 1001 is detachably attached to the transmission coil 1005 in this manner is to align the transmission coil 1005 with the reception coil. Specifically, the charging position of the electronic apparatus can be fixed by the fixing unit 1004a. The coil cover 1001 can be detachably attached so as to install the transmission coil 1005 at a position where the reception coil and the alignment match with the fixed charging position.

The transmission coil 1005 can be installed parallel to the charging space 1003 of the electronic device.

7 is a view for explaining a wireless charging table including a wireless charging device according to the first embodiment of the present invention.

As shown in FIG. 7, the wireless charging table 1100 may include a wireless charging device 1000 inside the table. In particular, the wireless recharging table 1100 may be formed such that the upper surface of the wireless recharging device 1000 is positioned on the upper surface 1010 of the wireless recharging table 1100. Accordingly, the injection port 1002 of the wireless charging apparatus 1000 may be located on the upper surface of the wireless recharging table 1100.

Accordingly, the electronic device can be inserted in the direction perpendicular to the wireless charging table 1100 with the injection port 1002. Accordingly, the electronic device can be wirelessly charged in a state in which it is not located on the top surface 1010 of the wireless recharging table 1100. Accordingly, the wireless charging table 1100 according to the first embodiment of the present invention has an effect of providing a method of fully utilizing the top surface of the wireless charging table 1100 while charging electronic equipment. The wireless recharging table 1100 according to the first embodiment can charge electronic equipment using a magnetic induction system or a self resonance system.

8 to 9 are views for explaining a wireless charging apparatus according to a second embodiment of the present invention.

The wireless charging apparatus 2000 according to the second embodiment of the present invention may be formed in the shape of a letter 'A' as shown in FIG.

The wireless charging apparatus 2000 may also include a first coil cover 2001, an inlet 2002, a magnetic induction transmission coil (not shown), a self-resonant transmission coil 2015 and a second coil cover 2016 A charging position 2013 may be formed on the upper surface of the wireless charging apparatus 2000. [ Specifically, the first coil cover 2001, the injection port 2002, and the magnetic induction transmission coil are formed on the longitudinal side of the letter 'A', and the self-resonant transmission coil 2015, the charging position 2013, 2016) may be formed on the horizontal plane of the 'a' character. Or vice versa.

Hereinafter, each component will be described in detail.

The first coil cover 2001 and the injection port 2002 are the same as those described above.

The magnetic induction transmission coil may be located between the first coil cover 2001 and the filling space of the electronic device inserted through the inlet 2002 and is similar to that described with reference to Figures 3 to 7. [

The self-resonant transmission coil 2015 can be inserted and positioned inside the wireless charging device 2000. Specifically, the second coil cover 2016 can be detachably attached, and the self-resonant transmission coil 2015 can be inserted into the wireless charging apparatus 2000 in a state where the second coil cover 2016 is detached.

The self-resonant transmission coil 2015 may be positioned in a direction perpendicular to the magnetic induction transmission coil. For example, if a magnetic induction transmission coil (not shown) is formed on the longitudinal surface of the 'A' shaped wireless charging device 2000, the self-resonant transmission coil 2015 is connected to the ' (Not shown).

The charging position 2013 may be formed above the self-resonant transmitting coil 2015. [ The charging position 2013 may refer to a region where the self-resonant transmission coil 2015 can wirelessly charge. That is, the electronic apparatus placed in the charging position 2013 can be wirelessly charged by the self-resonant transmission coil 2015. [

The wireless charging apparatus 2000 as shown in FIG. 8 can provide different wireless charging schemes at the same time. Specifically, a wireless charging method according to a magnetic induction method and a wireless charging method according to a magnetic resonance method can be simultaneously provided.

The wireless charging device 2000 shown in FIG. 9 is similar to the wireless charging device 2000 shown in FIG. 8, but is a case where a plurality of wireless charging devices according to the magnetic induction method are expanded. For example, it is assumed that there are three wireless chargeable devices according to the magnetic induction method.

The wireless charging device 2000 can charge three electronic devices simultaneously by inserting electronic devices into each of the three injection ports 2002a, 2002b, and 2002c. In this case, the wireless charging apparatus 2000 may include three charging spaces and three transmission coils corresponding to the three injection ports 2002a, 2002b, and 2002c, respectively. The first coil cover 2001 may be formed in a plurality corresponding to each of the three transmission coils. Alternatively, it may be formed of one first coil cover 2001 covering three transmission coils at one time.

According to this, it is possible to simultaneously charge the electronic apparatuses of a plurality of magnetic induction systems and the electronic apparatuses of the self-resonance system.

Next, FIG. 10 is a left side view of the wireless charging apparatus according to the second embodiment of the present invention.

10, a first coil cover 2001, a magnetic induction transmission coil 2005, a charging space 2003, and a fixing portion 2004 are formed on the longitudinal surface of the wireless charging device 2000. As shown in Fig. Each component is the same as that described with reference to Fig.

The self-resonant transmission coil 2015 and the second coil cover 2016 may be formed on the lateral surface of the wireless charging device 2000. The electronic device located on the upper side can be wirelessly charged by the self-resonant transmission coil 2015. [

The wireless charging device 2000 as described with reference to FIGS. 8 to 10 may be included in a table to form a wireless charging table. In other words, similarly to the case described with reference to FIG. 7, the injection ports 2002a, 2002b, and 2002c of the wireless charging device 2000 are formed on the top surface of the wireless charging table 2000, Both can be supported.

11 is a view for explaining a wireless charging apparatus according to the third embodiment of the present invention.

The wireless charging apparatus 3000 according to the third embodiment can support an NFC (Near Field Communication) communication technology together with a plurality of wireless charging methods.

The wireless charging apparatus 3000 according to the third embodiment may include at least one of a wireless charging module of a magnetic induction type, a wireless charging module of a self-resonance type, and an NFC module. A charging space (not shown) and a magnetic induction transmission coil (not shown) corresponding to the coil cover 3001, the injection ports 3002a, 3002b and 3002c and the respective injection ports 3002a, 3002b and 3002c. The detailed description of each component is the same as described above.

The self-resonant wireless charging module may include a second coil cover 3016, a self-resonant transmission coil 3015, and a charging position 3013. The detailed description of each component is the same as described above.

The NFC module may include an NFC transmit coil 3025. At this time, the NFC transmission coil 3025 may be located at the edge of the self-resonant transmission coil 3015. Specifically, the NFC transmission coil 3025 may be positioned at the edge of the self-resonant transmission coil 3015 with respect to the plane on which the self-resonant transmission coil 3015 is located. This is to prevent interference between the self-resonant wireless charging operation frequency and the NFC operating frequency. Specifically, when the A4WP transmission coil and the NFC transmission coil according to the self-resonance method are located closely, the wireless charging efficiency of A4WP may be reduced due to the frequency interference phenomenon. The present invention can minimize the reduction of the wireless charging efficiency by placing the NFC transmitting coil at the edge of the A4WP transmitting coil. As a result, it is possible to solve the problem that the efficiency of the self-resonant wireless charging is low.

Meanwhile, the NFC transmission coil 3025 can be inserted into the wireless charging device 2000 in a state where the second coil cover 3016 is detached. When the insertion of the self-resonant transmission coil 3015 and the NFC transmission coil 3025 is completed, the second coil cover 3016 can be attached. The second coil cover 3016 is optionally removable.

12 is a view for explaining a wireless charging table including a wireless charging device according to a third embodiment of the present invention.

The wireless recharging table 3100 according to the third embodiment may include a wireless recharging device 3000 therein. Specifically, the upper surface of the wireless charging device 3000 may be formed to be positioned on the upper surface of the wireless charging table 3100. Therefore, the injection ports 3002a, 3002b, and 3002c of the wireless charging device 3000 may be formed on the top surface of the wireless charging table 3100. [

The remaining components of the wireless charging device 3000 excluding the injection ports 3002a, 3002b, and 3002c may be formed inside the wireless charging table 3100. [

Next, FIG. 13 is an exemplary view showing charging of the electronic device through the wireless charging table according to the third embodiment of the present invention.

At least one of the electronic devices 100 may be wirelessly charged according to a magnetic induction method or a self resonance method.

Specifically, at least one electronic device 100 may be inserted into the wireless charging table 3100 in the longitudinal direction through the injection ports 3002a, 3002b, and 3002c. The electronic device 100 inserted in the charging space can be charged with the induction current flowing through a magnetic induction transmission coil (not shown) located on the rear side of the charging space. In this case, the user can use the entire top surface of the table while charging the electronic device 100, which is convenient.

Also, the electronic device 1000 may be placed on the top surface of the wireless recharging table 3100 and charged by a self-resonating method. This is because the self-resonance method can charge electronic equipment located relatively far away. Accordingly, the user can conveniently charge the electronic device 100. [

In addition, since the wireless recharging table 3100 supports both the magnetic induction type and the self resonance type, the user can charge the self-induction type or the self-resonance type by selecting the required mode depending on the type of the electronic device.

In addition, the wireless charging table 3100 has an effect of supporting NFC communication simultaneously with wireless charging. In particular, there is an effect that it is possible to support NFC communication while ensuring the efficiency of wireless charging of the self-resonance method.

The wireless charging apparatus and the wireless charging table including the wireless charging apparatus described above are not limited to the configuration and method of the embodiments described above, but the embodiments may be modified so that all or a part of each embodiment Or may be selectively combined.

Claims (8)

In the wireless charging table,
An injection port into which the electronic device is inserted; And
And a magnetic induction transmission coil for generating an induction current in a reception coil of the electronic device to wirelessly charge the electronic device,
Wherein an inlet of the wireless charging device is formed on an upper surface of the wireless charging table,
Wireless charging table. The method according to claim 1,
Wherein the wireless charging device further comprises a fixing portion for fixing the electronic device to align the alignment coil of the receiving coil of the electronic device and the magnetic-
Wireless charging table. The method according to claim 1,
Wherein the wireless charging device further includes a self-resonant transmission coil for generating a resonance phenomenon to wirelessly charge the electronic device,
Wireless charging table. The method of claim 3,
Wherein the wireless charging device further comprises a nearfield communication (NFC)
Wireless charging table. 5. The method of claim 4,
Wherein the NFC transmitting coil is located at an edge of the self-
Wireless charging table. The method according to claim 1,
Wherein the wireless charging apparatus is provided with a charging space such that the electronic apparatus is positioned inside the wireless charging table as the electronic apparatus is inserted in the longitudinal direction through the injection port,
Wireless charging table. The method of claim 3,
Wherein the wireless charging device includes a plurality of the injection ports and the magnetic induction transmission coil to wirelessly charge a plurality of electronic devices simultaneously,
Wireless charging table. The method of claim 3,
Wherein the magnetic charger is formed in a shape of a letter "A", the magnetic induction transmission coil is located on the longitudinal side of the wireless charging device, and the self-
Wireless charging table.

Images