KR20130091183A - Charging device for mobile terminal - Google Patents

Abstract

PURPOSE: A terminal charging device is provided to suppress degradation of radio signal sensitivity at a terminal by containing a signal amplification part. CONSTITUTION: A terminal charging device includes a body (200) and a signal amplification part (203). The body is prepared to generate an induced electromotive force to a nearby terminal through the charging device. The signal amplification part is mounted at the inside of the body and amplifies a signal in order to improve degradation of received signal sensitivity at a terminal (100) caused by a magnetic field while charging the terminal. The signal amplification part includes a reception antenna (202) and a transmission antenna (204), and the transmission antenna is electrically connected with the reception antenna. The reception antenna and transmission antenna are composed of multiple antennas to process multi-input and multi-output. The terminal charging device charges the terminal by using an induced electromotive force generated from the body.

Description

Terminal Charging Device {CHARGING DEVICE FOR MOBILE TERMINAL}

The present invention relates to a contactless charging device of a mobile terminal.

In the wired charging method, a charging failure due to a poor contact during charging and a shortening of a battery life may occur accordingly. Therefore, in recent years, a wireless charging method that does not require an adapter connecting the charging module and the mobile terminal in order to charge the battery of the mobile terminal has been used.

The charging principle of the contactless charging device is as follows. The terminal is provided with a coil connected to the battery. The coil is also provided in the charging device and when a current flows in the coil of the charging device, a magnetic field is generated, and the magnetic force flux density applied to the terminal coil is changed by the magnetic field. According to Lenz's law, induced current and induced electromotive force are generated in the terminal coil. The battery of the terminal can be charged using the induced current generated at this time as the charging current.

However, in contactless charging by induced current and induced electromotive force, the magnetic field changes rapidly around the terminal, and the signal received by the terminal is interrupted by the magnetic field, thereby degrading the sensitivity of the received signal. In addition, if the charging current is decreased to increase the terminal wireless signal reception sensitivity, the charging time is increased.

The present invention is to provide a terminal charging device that can increase the sensitivity of the signal received by the terminal during charging.

In order to solve the above problems, the terminal charging device according to an embodiment of the present invention includes a body, a signal amplifier. The body may be provided with a coil, and the coil may generate induced electromotive force in a terminal adjacent to the charging device. The signal amplifier is mounted inside the body, and improves that the terminal received signal sensitivity is lowered by a magnetic field during charging.

According to an example related to the present invention, the signal amplifier includes a receiving antenna and a transmitting antenna. The receiving antenna is mounted to the body spaced apart from the coil, and the transmitting antenna is electrically connected to the receiving antenna.

According to an example related to the present invention, the receiving antenna is mounted adjacent to one side of the body to reduce the transmission signal of the transmitting antenna from being received by the receiving antenna. The transmitting antenna is mounted adjacent to the other side.

According to an example related to the present invention, the reception antenna and the transmission antenna are composed of multiple antennas to enable multi-input multi-output.

According to an example related to the present invention, the receiving antenna is formed to adjust the length, and the transmitting antenna is electrically connected to the antenna matching circuit and is formed to receive a matched signal.

According to an example related to the present invention, the signal amplifier includes a first filter for selecting and passing at least a portion of the received signal.

According to an example related to the present invention, the first filter may be a band pass filter configured to pass the received signal and block the transmitted signal of the transmit antenna.

According to an embodiment related to the present invention, the signal amplifier is formed to pass through the low noise amplifier (LNA) for amplifying the signal passed through the first filter and at least a portion of the signal passed through the low noise amplifier (LNA) And a second filter.

According to an example related to the present invention, the signal amplifier includes at least two band pass filters and branch filter elements. The band pass filters have different pass bands, and the branch filter element is disposed at a branch point at which a signal branches to the band pass filters.

Terminal charging apparatus according to at least one embodiment of the present invention configured as described above may include a signal amplifier to amplify the signal received by the terminal. Through this, it is possible to reinforce the signal interfered by the magnetic field during charging to improve the degradation of the wireless signal sensitivity of the terminal.

1 is a perspective view of an example of a terminal charging device according to the present invention viewed from the front.
Figure 2 is a conceptual view of the inside of the terminal charging device related to the present invention.
3 is a conceptual diagram of a terminal charging device according to an embodiment of the present invention.
Figure 4 is a conceptual diagram showing an embodiment of the signal amplifier of the terminal charging device related to the present invention.

Hereinafter, a terminal charging device according to the present invention will be described in more detail with reference to the accompanying drawings. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The mobile terminal described herein may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), navigation, and the like.

Hereinafter, a detailed structure of the charging device for charging the mobile terminal will be described.

1 is a front perspective view of an example of a terminal charging device according to the present invention.

Referring to FIG. 1, the charging device may charge an adjacent mobile terminal 100. More specifically, the charging device may charge the mobile terminal 100 having a coil 101 capable of generating induced electromotive force. This will be described in detail with reference to FIG. 3.

The charging device may include a receiving antenna 202, the charging device body 200 and the power supply unit 207.

The reception antenna 202 may be an external antenna.

The antenna may be formed to have a length suitable for a mobile communication mode such as Global System for Mobile Communication (GSM), EGSM, Universal Mobile Telecommunications System (UMTS), Defende Communication System (DCS), and Personal Communication Services (PCS).

In addition, the antenna may be formed to have a length suitable for receiving a broadcast band. That is, the antenna may be formed to have a length suitable for a broadcast mode such as DMB, DAB, DVB, etc. to receive TV, radio, or video broadcast.

As an embodiment, if the antenna is for TV broadcasting receiving terrestrial waves, the physical length is about 20 cm, so that the antenna may be folded in multiple stages.

The power supply unit 207 supplies power to the charging device. The power supply unit 207 may be connected to a power source external to the charging device. The power may be supplied by a battery that is built in the charger body or can be directly detached from the outside of the charger.

2 is a conceptual view of the inside of the terminal charging apparatus according to the present invention.

The body 200 may include a mobile communication module, a broadcast receiving module, a short range communication module and a location information module. These communication modules can be optionally adjusted by the manufacturer.

The body 200 may be equipped with a coil 205 and a signal amplifier 203.

The coil 205 forms a magnetic field when current flows.

The terminal 100 chargeable with the charging device according to the present invention includes a coil 101 connected to a battery. The coil 205 is also provided in the charging device, and when a current flows in the coil 205 of the charging device, a magnetic field is generated, and the magnetic force flux density applied to the terminal coil 101 is changed by the magnetic field.

According to the law of Lenz, induction current and induced electromotive force are generated in the terminal coil 101. The battery of the terminal can be charged using the induced current generated at this time as the charging current.

The signal amplifier 203 may include a reception antenna 202, a transmission antenna 204, and the like.

The reception antenna 202 and the transmission antenna 204 may be internal antennas mounted inside the body 200 or external antennas mounted outside the body 200.

The receiving antenna 202 and the transmitting antenna 204 may be spaced apart from the coil 205 so as to be less affected by the magnetic field.

When the antenna is an external antenna, the antenna may be folded in multiple stages to receive or transmit signals of various bands.

 The transmission antenna 204 and the reception antenna 202 may be configured with a plurality of antennas capable of simultaneously transmitting and receiving data in a multi-antenna signal processing scheme according to a multi-input multi-output (MIMO) technique. In this case, data can be simultaneously transmitted and received to implement wide area wireless data communication, and transmission speed can be greatly improved to increase transmission efficiency.

By using multiple input / output (MIMO) technology, if N antennas are arranged at the transmitting end and N antennas are arranged at the receiving end, the signal can be increased by N times.

In particular, when the multi-input / output technology is used together with orthogonal frequency division multiplexing (OFDM) used in the representative LTE (Long Term Evolution) of the 4th generation mobile communication technology, it is possible to speed up the transmission speed and increase the capacity of the data to optimize the multimedia service environment. Can be built.

OFDM technology can divide and transmit one channel into several channels by dividing frequency and time, and can save bandwidth by overlapping between subchannels, and can minimize frequency interference by dividing the frequency band into hundreds.

The antenna may be one or more primary antennas or one or more diversity antennas. The antenna may receive a signal from a base station.

The communication standard of the mobile communication module may include Code Division Multiple Access (CDMA), Wideband CDMA (WCDMA), High Speed Packet Access (HSPA), CDMA2000, High Rate Packet Data (HRPD), Ultra Mobile Broadband (UMB), and the like. In addition, the 4G mobile communication network may include, for example, a 3GPP Long Term Evolution (LTE) standard, a 3GPP2 UMB standard, and the like.

Primary antennas are PCS primary antennas for transmitting and receiving signals at PCS (Personal Communication Service) frequency, CDMA / DCN / WCDMA primary antennas for transmitting and receiving signals at CDMA / DCN (Digital cellular network) / WCDMA frequency, Global System (GSM) For mobile communication) may include a GSM primary antenna for transmitting and receiving signals at the frequency, LTE / UMB primary antenna for transmitting and receiving signals at the LTE / UMB frequency and the like. Diversity antennas for e-HRPD for receiving signals at DCN and PCS frequencies, for High Speed Downlink Packet Access (HSDPA) / High Speed Uplink Packet Access (HSUPA) / HSPA for receiving signals at W-CDMA frequency It may include a diversity antenna, a diversity antenna for LTE that receives a signal at an LTE frequency. Each antenna may be added with a GPS (Global Position System) antenna to implement a multi-module.

The signal amplifier 203 may further include not only primary antennas and diversity antennas, but also a broadcast receiving antenna, a short range communication antenna, and the like.

The signal amplifier 203 may be formed to amplify the signal so that the sensitivity of the terminal received signal is reduced by the magnetic field while charging the terminal.

The signal amplifier 203 may include a low noise amplifier 203b for amplifying a received signal.

According to an embodiment of the present invention, the low noise amplifier 203b is electrically connected to the reception antenna 202 and the transmission antenna 204 to amplify a signal transmitted from the reception antenna 202 and then the transmission antenna. And pass to 204.

The reception antennas 202 may be spaced apart from each other so as to receive less interference from the transmission signal of the transmission antenna 204.

As an example, if the receiving antenna 202 is mounted adjacent to the front of the charging device body 200, the transmitting antenna 204 may be mounted adjacent to the rear of the body 200. If the receiving antenna 202 is mounted adjacent to one side of the charging device body 200, the transmitting antenna 204 may be mounted to be adjacent to the other side.

The signal amplifier 203 may include a first filter 203a for selecting and passing at least a portion of the received signal.

The first filter 203a may be a band pass filter, and in one embodiment, the first filter 203a may set a pass band to pass the received signal and block the transmit signal of the transmit antenna 204. Can be.

The first filter 203a may be electrically connected to the low noise amplifier 203b. Some of the signals received through the reception antenna 202 pass through the first filter 203a, and the signals passing through the reception antenna 202 are amplified through the low noise amplifier 203b and then transmitted to the transmission antenna 204.

The signal amplifier 203 may further include a second filter 203c that selects and passes a portion of the amplified signal. The second filter 203c may be a band pass filter, and the pass band may be arbitrarily set. The second filter may filter noise.

The signal passing through the first filter 203a among the signals received through the reception antenna 202 is amplified by the low noise amplifier 203b. The amplified signal is filtered through a second filter 203c and then transmitted to the transmission antenna 204.

An antenna matching circuit 204a may be further included to set the resonance frequency of the transmission antenna 204. The antenna matching circuit 204a may match impedance to widen the bandwidth of the resonance frequency.

3 is a conceptual diagram of a terminal charging device according to an embodiment of the present invention.

Referring to FIG. 3, the charging device may generate a charging current in an adjacent terminal.

The mechanism by which the charging device generates the charging current is as follows.

The terminal 100 is provided with a coil 205 electrically connected to the battery.

The charging device is equipped with a coil 205 that is formed to generate a magnetic field. When the current flows through the coil 205 of the charging device, the strength of the magnetic field applied to the terminal is changed, and the current is generated in the terminal coil 205 by the induced electromotive force. The current serves as a charging current for charging the battery electrically connected to the terminal coil 205.

The antenna of the terminal receives a signal transmitted from the base station. The charging device of the present invention can compensate for the degradation of the terminal received signal sensitivity due to the interference of the magnetic field generated by the charging device during terminal charging.

According to an embodiment of the present invention, the receiving antenna 202 of the charging device is formed to receive the base station transmission signal.

The signal received by the reception antenna 202 passes through the first filter 203a, the low noise amplifier 203b and the second filter 203c, and is then transmitted to the matched transmission antenna 204 by the matching circuit 204a. The transmitting antenna 204 may transmit the amplified signal to the antenna of the terminal.

4 is a conceptual diagram illustrating an embodiment of the signal amplifier 203 of the present invention.

The signal amplifier 203 is formed to amplify at least two or more band signals of different bands.

Referring to FIG. 4, an embodiment of the present invention may amplify three frequency band signals.

The signals received by the reception antenna 202 are branched into three, and a triplexer 206a capable of branching each signal is provided at the branch point. The signal branched by the triplexer 206a passes through different paths.

Each path includes a first filter 203a having a set pass band, a low noise amplifier capable of amplifying a signal passing through the band pass filter, and a first filter 203a formed to filter a part of the signal passing through the amplifier. It may include two filters (203c).

The signal passing through each path is transmitted to the combiner 206b, and the signal passing through the combiner 206b is transmitted to the terminal 100 through the transmission antenna 204.

The triplexer 206a may be replaced by a diplexer, and in this case, signals of two bands may be selectively amplified.

The triplexer 206a may be replaced with a branch filter element for branching signals into N branches. In this case, there are N signal transmission paths, and each path may include a filter and an amplifier.

In one embodiment, the frequency region branched by the branch filter element of the signal received by the reception antenna 202 may include at least one of 2110 to 2170 MHz, 869 to 894 MHz, or 1930 to 1990 MHz. According to the exemplary embodiment of the present invention, the reception signal can be amplified without having to change the signal amplifier 203 even in regions using different frequency bands. Thus, the user can use the charging device of the present invention in various regions.

The terminal charging apparatus described above is not limited to the configuration and method of the above-described embodiments, but the embodiments are configured by selectively combining all or some of the embodiments so that various modifications can be made. May be

Claims (9)

In the terminal charging device for charging a terminal chargeable by induction electromotive force,
A body having a coil formed to generate an induced electromotive force in a terminal adjacent to the charging device; And
And a signal amplifier mounted inside the body to amplify the signal so that the terminal received signal sensitivity is reduced by a magnetic field during charging. The method of claim 1,
Wherein the signal amplifying unit comprises:
A receiving antenna spaced apart from the coil and mounted to the body; And
And a transmitting antenna electrically connected to the receiving antenna. The method of claim 2,
The receiver antenna is mounted adjacent to one side of the body, and the transmission antenna is mounted adjacent to the other side to reduce the transmission signal of the transmission antenna to the reception antenna. Device. The method of claim 2,
The receiving antenna and transmitting antenna,
Terminal charging device, characterized in that composed of multiple antennas to enable multi-input multi-output (Multi-Input Multi-Output). The method of claim 2,
The receiving antenna is formed to adjust the length,
The transmitting antenna is electrically connected to the antenna matching circuit, the terminal charging device, characterized in that formed to receive a matched signal. The method of claim 1,
Wherein the signal amplifying unit comprises:
And a first filter for selecting and passing at least a portion of the received signal. The method according to claim 6,
And the first filter is a band pass filter configured to pass the received signal and block a transmission signal of the transmission antenna. The method according to claim 6,
Wherein the signal amplifying unit comprises:
A low noise amplifier (LNA) for amplifying the signal passed through the first filter; And
And a second filter formed to select and pass at least a portion of the signal that has passed through the low noise amplifier (LNA). The method of claim 2,
Wherein the signal amplifying unit comprises:
A reception signal of the reception antenna is branched and transmitted, and includes at least two band pass filters having different pass bands,
The terminal charging device, characterized in that the branching filter element includes a branching point of the signal.

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