KR20160127982A

KR20160127982A - Wireless usb charger capable of auto wireless charging

Info

Publication number: KR20160127982A
Application number: KR1020150059612A
Authority: KR
Inventors: 김선규
Original assignee: 김선규
Priority date: 2015-04-28
Filing date: 2015-04-28
Publication date: 2016-11-07

Abstract

The present invention relates to a wired / wireless USB charging device having a USB port and a wireless charging coil, a charger main body having a wireless charging part and a component part installed therein and a cover rotatably connected to the charger main body, Wherein the battery charger is provided with a wireless charging coil, a USB port is provided on a side surface and a top surface of the charger main body, a battery mounting space is provided in the charger main body, The charging coil senses a change in electrical characteristics and the central processing unit performs wireless charging or stops by the output of the sensor so that it can wirelessly charge two or more terminals with a compact size and a battery storage space It is also possible to charge the battery, and also to attach the portable terminal to the charger. It is possible to provide a wired / wireless USB charger capable of automatically charging wirelessly by recognizing the portable terminal automatically.

Description

WIRELESS USB CHARGER CAPABLE OF AUTO WIRELESS CHARGING,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wired / wireless USB charger capable of automatic wireless charging, and more specifically, it can be wired or wirelessly charged, and wired charging is provided with a USB (Universal Serial Bus) And more particularly to a wired / wireless USB charger capable of automatic wireless charging that is easy to use since it has a mechanical structure that is provided with a charging antenna coil and reduces an area when necessary.

Generally, a commercial AC power source of 220V is used as an input power source to drive household appliances such as a TV, audio, and a refrigerator. However, many portable electronic devices such as mobile phones, PDAs, and digital cameras use a driving voltage of 4-5V. Therefore, an adapter has been used to drop the 220V high-voltage AC input power input to the home or office to a low voltage of 4-5 V that matches the driving voltage of a portable electronic device.

In addition, a multi-tap has been used to supply the commercial alternating current flowing through a single power cord to a plurality of household appliances. In recent years, a plurality of USB ports have been installed in a multi-tap, so that a voltage for driving electronic devices driven by a low voltage can be supplied through a multi-tap.

In addition, a technology for a desktop multi-tap having a USB port has been proposed, and a USB output port is additionally provided in a multi-tab provided with a plurality of outlets, thereby providing driving power to a large number of portable electronic devices driven with low voltage without a separate adapter .

Korean Patent Laid-Open Publication No. 10-2014-0133062 discloses "first and second DC output line filters for reducing the ripple of the output voltage signal of the first and second DC output rectifiers, A voltage controller for controlling a voltage of the transformer, the voltage controller being connected to a second DC output line filter for adjusting an output voltage of the transformer and connected to an output terminal of the DC output line filter, A current controller for controlling the output current of the first DC output terminal and outputting a stable current by being connected to the first DC output terminal; A USB output unit including a plurality of USB output ports for receiving a stable current outputted from the current control unit and transmitting the stable current to an external device, and a USB output unit connected to the second DC output unit, Converting the DC voltage signal to the wireless power signal to the wireless power signal transmission unit for transmitting via the antenna; containing provide a wired or wireless USB charger ", and

Korean Patent No. 10-1266446 discloses a wire charging module for supplying a charging current to a battery through a connection of an electrode terminal of a battery, a non-contact charging for supplying power to the primary coil by converting the time- A primary coil for generating a magnetic field based on the time-varying power applied from the contactless charging power supply module to form a magnetic coupling with a secondary coil provided in the communication terminal, A charge mode display unit for displaying whether the battery is charged in a wired charge mode or a non-contact charge power supply mode, a controller for controlling the display of the charge mode display unit based on operation of the wired charge mode and the non- Quot ;. < / RTI >

However, since there is an area occupied by the coils due to the provision of the uncharged charging coil when performing the wireless charging, the wireless charging is restricted to one or the size of the charger is increased, and when the portable terminal is attached to the charger , The portable terminal (or smart phone) is automatically recognized and wireless charging is not performed.

Accordingly, a wireless charger that automatically recognizes the portable terminal (or smart phone) and charges the portable terminal when the portable terminal is attached to the charger is provided so that the size of the charger is not increased although at least two wireless charging coils are provided. The development of the

Prior Art 1: Korean Patent Publication No. 10-2014-0133062, Disclosure Date (November 19, 2014) Prior Art 2: Korean Patent No. 10-1266446, Registration Date (May 15, 2013)

In the present invention, at least two wireless charging coils are provided but the size of the charger is not increased. When the portable terminal is attached to the charger, the portable terminal (or smart phone) is automatically recognized and charged It is an object of the present invention to develop a wired / wireless USB charger capable of automatic wireless charging having a battery charging space but a compact size.

The object of the present invention is achieved by providing a wired / wireless USB charging device including a USB port and a wireless charging coil, wherein a charger main body having a wireless charging part and a component part installed therein and a cover rotatably connected to the charger main body are provided, And a USB port is provided on a side surface and a top surface of the charger main body, a battery mounting space is provided in the charger main body, a sensor is provided in the wireless charger, The wireless charging coil senses a change in electrical characteristics, and the output of the sensor causes the central processing unit to perform or stop wireless charging.

The wired / wireless USB charging unit includes a USB port and a wireless charging coil. The wireless charging unit includes a charger main body having a wireless charging unit and a component unit installed therein. The charging unit main body is slidably moved to the outside of the housing, The main body of the charger includes a central processing unit for controlling wireless charging. A USB port is provided on a side surface and a top surface of the main body, and a battery mounting space is provided in the main body of the charger. The wireless charging unit is further provided with a sensor to sense a change in electrical characteristics of the wireless charging coil, and the central processing unit performs wireless charging or stops by the output of the sensor.

According to the present invention, it is possible to wirelessly charge two or more terminals while having a compact size, and also there is a battery storage space, so that the battery can be charged. Further, when attaching the portable terminal to the charger, It is possible to provide a wired / wireless USB charger capable of automatic wireless charging in which charging is performed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram of an embodiment showing the outline of a general "wired / wireless USB charger ".
2 to 5 are views of an embodiment of a wired / wireless USB charger of the present invention,
6 is a diagram of an embodiment in which wireless charging is automatically performed by a sensor.
7 is a view of an embodiment showing a coil shape for performing automatic charging.
Figures 8 and 9 are views of embodiments illustrating a block diagram for effectuating wireless charging.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for similar elements in describing each drawing. The terms first, second, etc. may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, the term "and / or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Should not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a wired / wireless USB charger capable of automatic wireless charging according to an embodiment of the present invention will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram of an embodiment showing the outline of a general "wired / wireless USB charger ".

A wired / wireless USB charger generally includes a charger body 10, a cable 20 for supplying power to the charger, a plurality of USB ports 30 formed on one side of the charger body, and a wireless charging pad (coil) (Not shown in Fig. 1). The charger 10 further includes electrical components such as a wireless charger 45 and a component 46,

Here, the "wired / wireless USB charger" of the present invention includes a commercial AC input for receiving commercial AC power; A charging circuit for rectifying the AC voltage to a DC voltage while removing noise of the inputted AC voltage and for lowering the voltage according to the driving voltage of the electronic device; A USB output unit for transmitting an output voltage of the charging circuit unit to an external electronic device; And a wireless power signal transmission unit for wirelessly transmitting an output voltage of the charging circuit unit to an external electronic device.

The charging circuit includes a power input terminal to which commercial AC power is input, an AC line filter to reduce conduction noise of the AC voltage signal input to the power input terminal, a rectifier to convert an output AC voltage of the AC line filter into a DC voltage, A first and a second DC output rectifiers for converting a rectangular-wave voltage, which is connected to an output terminal of the transformer, into a direct current, and a second DC output rectifier connected to the output terminal of the transformer for converting the DC high voltage output from the rectifier into a voltage of a desired magnitude, First and second DC output line filters for reducing ripple of the output voltage signal of the second DC output rectifier, first and second DC output stages connected to the outputs of the first DC output line filter and the second DC output line filter, And a controller for adjusting an output voltage of the transformer.

The controller may further include: a voltage controller coupled to the second DC output line filter to control a voltage of the transformer; And a PWM controller disposed between the voltage controller and the transformer.

The input power of the "wired / wireless USB charger" of the present invention is a commercial AC 220V power source. Then, the voltage drops through the transformer to the drive voltage level (4-5V) of the portable electronic device.

2 to 5 are views of an embodiment of a wired / wireless USB charger of the present invention,

2, the lid 50 covering the charger main body 10 is rotatably connected to the charger main body 10 by the connecting shaft 11. As shown in FIG. The USB port (terminal) 30 is provided on the side surface of the charger main body 10 so that the USB port (terminal) can be used even if the lid 50 covers the charger main body. A wireless charging pad (coil) 40 is installed on the cover.

Meanwhile, the wireless charger generally uses a wireless power consortium (WPC) scheme. In order to transmit wireless power energy of the WPC scheme, the following conditions are generally satisfied.

"Micro Henry - 12 micro-Henry", inductance value of the coil: 3.5 V, voltage: 7-15 V (receiver part basis), frequency: 100-200 kHz, current: 5 V

And another charging method can have the following conditions.

"Voltage: 7-24V (based on receiver), frequency: 1MHz - 6.78MHz, current: 5V (1A), power: 5W, coil inductance value: 600nH (Nano Henry)

In this case, the voltage and current values shown above do not mean that they exactly correspond to the above numbers, but they do indicate the range.

In any case, the difference between the two methods is that the reference can be set to 1 MHz at the difference of the frequency values. That is, the WPC method has a low frequency of 1 MHz (Mega Hertz) or lower and the other method is a high frequency of 1 MHz (Mega Hertz) or more.

However, the WPC method uses a frequency of 100 - 200 KHz, and the other uses a high frequency of 6 - 8 MHz or more.

The WPC method is "8 micro Henry-12 micro Henry" as the coil inductance value, and the other method is "600 nano Henry-2 micro henry".

The use of a high frequency in a frequency oscillating component also makes it possible to reduce the size of the component (generally, the high frequency can reduce the size of the component), reduce the inductance value of the coil, Instead, a coil formed by printing on a PCB substrate (or a resin substrate) can be used.

By forming the wireless charging coil 40 on the substrate, it is advantageous in mass production and can reduce the unit cost. And the number of turns of the coil (turns, number of turns) exceeds 50 times in the WPC method, and other methods can be possible in less than 50 times.

On the other hand, the number of turns is a number referred to as a standard to be applied to a mobile phone device. In general, a mobile phone device is a number generally calculated when the area is within a maximum of 100 cm square.

3 is a view of an embodiment when the lid 50 is opened. That is, even if the lid 50 is opened, a wireless charging pad (coil) 30 may be provided inside the lid, and a wireless charging pad (coil) 30 may be provided on the upper surface of the charger main body 10. Also, a USB port (terminal) 30 may be provided on the upper surface as well as the side surface of the charger main body 10. Therefore, it is possible to maintain the compact size while the two portable terminals can be wirelessly charged at the same time.

FIG. 4 is a view of an embodiment in which a battery charging space is provided therein. A battery charging space 12 is formed inside the charger body 10 so that the battery can be mounted in the charging space 12. In the present invention, a battery connecting terminal is provided in the battery charging space 12 so as to be connected to the electrode terminal of the battery.

In addition, even though the USB port 30 is provided in the upper part of the charger body 10, that is, when the battery is charged and a plurality of USB ports 30 are used at the same time, It is possible to wirelessly charge the battery 40 through the coil 40 at the same time. That is, since the lid 50 rotatably connected to the charger body 10 can be opened and closed, a compact size can still be maintained, although various functions can be performed at the same time.

5 is a view of another embodiment of the present invention, in which the charger main body 10 is mounted inside the housing 60 and the housing 60 and the charger main body 10 are slidingly moved. 5, when the USB port 30 is used, the charger main body 10 is housed in the housing 60, and the wireless charging coil 40 is installed in the housing upper portion 60, And is slid to the outside. On the other hand, the battery charging space 12 is provided in the charger main body 10, which slidably moves out of the housing 60,

That is, it is possible to simultaneously perform wired charging using the USB port (terminal) 30, battery charging using the battery, and wireless charging using the wireless charging coil 40. While the above three functions can be performed at the same time, The charger size can be kept compact.

6 is a diagram of an embodiment in which wireless charging is automatically performed by a sensor.

A sensor 17 is provided in the wireless charging unit 45 and the sensor 17 measures the voltage or current value at the coil 40. [ The central processing unit 15 senses the change of the current value or the voltage value through the sensor.

That is, when there is a certain standby voltage or current in the coil 40 of the wired / wireless charger of the present invention, when the smartphone to be charged is in close contact with the portable charger coil 40 of the present invention, Inducing phenomenon occurs, and a change in the standby current or standby voltage value of the coil 40 occurs. When the control unit 15 detects a change in the standby current or the standby voltage value through the sensor 17, the control unit 15 executes a control command to transmit the wireless charging energy, Will begin.

Therefore, when the smart phone is closely mounted on the wired / wireless charger of the present invention, charging is automatically started.

7 is a view of an embodiment showing a coil shape for performing automatic charging.

An NFC coil 40a may be further provided on the outside of the wireless charging coil 40. When the portable terminal transmits a charging signal through the NFC coil 40a, the wired / wireless charger of the present invention receives the charging signal through the NFC coil 40a. Upon receiving the charging signal, the wireless charging coil 40a To transmit the wireless charging power. Then, such control is performed by the execution of the central processing unit 15.

Figures 8 and 9 are views of embodiments illustrating a block diagram for effectuating wireless charging.

8, the power output by the control of the central processing unit 15 is transmitted to the coil 40 via the amplifier 18 and the resonant filter 62, .

9 is a view showing an embodiment showing a specific block diagram for performing wireless charging. The configuration of the wireless charger 45 includes a central processing unit 15 and a data receiving unit 62b, a power transfer frequency oscillator 62, a constant current circuit 62a, a current sensing unit 17, and the like. Further, a wireless charging coil 40 is further configured.

The WPC system has a wireless power transmission frequency of 100 to 130 KHz. That is, the coil has a number of rotating windings so that the maximum power can be obtained at 100 kHz to 130 kHz, which is used in the WPC system. The central processing unit 15 generates a radio power frequency while generating a frequency, and applies a voltage to the coil 40. [ This process is performed by the recession filter 62 and the current driver circuit 62a. The microcomputer applies a voltage to the coil part while applying the frequency.

When the portable terminal (smart phone, etc.) is placed on the wireless charging pad (coil) 40, the impedance is broken due to resonance, and the power is transmitted wirelessly to the wireless energy receiving coil provided in the smart phone.

At this time, a large amount of electric current flows through the wireless charging pad (coil) 40 because the electric power is transmitted wirelessly, and the current sensing unit 17 detects that the wireless charging pad (coil) 40 is being wirelessly charged in the central processing unit 15.

If a charge signal is sensed at the current sensing unit, the central processing unit 15 continues to generate the frequency to keep the wireless power transfer frequency oscillator operating to continue charging.

However, when charging is stopped in the portable terminal (smart phone), that is, when the portable device lifts up the wireless charging pad (coil) 40, the charging stops and the current flowing in the wireless charging monitor 40 stops. If the current does not flow, the central processing unit 15 detects the current by the current sensing unit 17 and returns to the standby state to repeat "100 ms: on, 900 ms: off".

10 and 11 are views of another embodiment of the present invention further comprising a multi-tap.

10, a wireless charging pad (coil) 30 is provided on the inside of the lid and a wireless charging pad (coil) 30 is provided on the upper surface of the charger main body 10 even when the lid 50 is opened. Also, a USB port (terminal) 30 may be provided on the upper surface as well as the side surface of the charger main body 10.

On the other hand, the charger main body 10 may further include a multi-tap 33 on the upper surface thereof, which can be connected to the power source as shown in the drawing. Of course, at this time, the battery charging space may be further provided in the charger main body 10 by applying the embodiment of FIG.

11 is a view of still another embodiment, in which the charger main body 10 is mounted inside the housing 60 and the housing 60 and the charger main body 10 are slidingly moved. When the USB port 30 is used, the charger main body 10 is slidably moved to the outside of the housing 60. The wireless charger 40 is mounted on the upper housing 60, . On the other hand, the battery charging space 12 is provided in the charger main body 10, which slidably moves out of the housing 60,

Also, as shown in the drawing, the charger main body is further provided with a multi-tap 33 to enable power connection to various electronic devices. It is a matter of course that instead of providing the battery charging space 12, the wireless charging coil 40 may be provided in the charger body 10. [

10: charger main body 20; cable
30; USB port (terminal) 40: Charging pad (coil)
45: wireless charging unit 46:
11: connecting shaft 50; cover
12: Battera charging space 16: Amplifier
15: central processing unit 17: sensor

Claims

With a USB port and a wireless charging coil, in a wired or wireless USB charger,
A charger main body in which a wireless charger unit and a component unit are installed, and a cover rotatably connected to the charger main body,
The charger main body is provided with a central processing unit for controlling wireless charging,
A wireless charging coil is provided on the cover, a USB port is provided on a side surface and a top surface of the charging unit,
The battery charger main body is provided with a battery mounting space,
Wherein the wireless charging unit is provided with a sensor to sense a change in electrical characteristics of the wireless charging coil and the central processing unit performs wireless charging or stops by the output of the sensor, .

With a USB port and a wireless charging coil, in a wired or wireless USB charger,
A charger main body in which a wireless charger and a component part are installed, and a housing in which the charger main body is housed,
The charger body slides and moves to the outside of the housing, a wireless charging coil is provided on the upper surface of the housing,
The charger main body is provided with a central processing unit for controlling wireless charging,
A USB port is provided on a side surface and a top surface of the charger main body,
The battery charger main body is provided with a battery mounting space,
Characterized in that the wireless charging unit further comprises a sensor to sense a change in electrical characteristics of the wireless charging coil and to cause the central processing unit to perform wireless charging or to stop by the output of the sensor. charger.