KR200371122Y1 - Direct current supplier with the multiple USB port - Google Patents

Direct current supplier with the multiple USB port Download PDF

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Publication number
KR200371122Y1
KR200371122Y1 KR20-2004-0028687U KR20040028687U KR200371122Y1 KR 200371122 Y1 KR200371122 Y1 KR 200371122Y1 KR 20040028687 U KR20040028687 U KR 20040028687U KR 200371122 Y1 KR200371122 Y1 KR 200371122Y1
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KR
South Korea
Prior art keywords
usb port
voltage
power supply
usb
supply
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KR20-2004-0028687U
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Korean (ko)
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임영삼
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임영삼
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Priority to KR20-2004-0028687U priority Critical patent/KR200371122Y1/en
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Publication of KR200371122Y1 publication Critical patent/KR200371122Y1/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048Detection of remaining charge capacity or state of charge [SOC]
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20Charging or discharging characterised by the power electronics converter
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/30Charge provided using DC bus or data bus of a computer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S320/00Electricity: battery or capacitor charging or discharging
    • Y10S320/18Indicator or display
    • Y10S320/21State of charge of battery

Abstract

본 고안은 가정 전원을 직접 USB포트에 의하여 CD플레이어, mp3플레이어, 노트북, 휴대폰등의 소형가전제품에대한 충전 그리고 필요시 인접한 컴퓨터에 연결되어져 컴퓨터에 저장된 데이터를 송수신 할 수 있도록 구성한 멀티포트와 데이터통신가능한 전원접속장치에 관한 것이다.The present invention is designed to charge home appliances such as CD players, mp3 players, laptops, mobile phones, etc. directly through the USB port, and to connect to adjacent computers when necessary. The present invention relates to a communication power supply connecting device.

휴대폰, 디지털카메라, 시디플레이어,디지털캠코더등의 다양한 전자장비들이 사용되면서 이들과 컴퓨터와의 공용성을 확보하고자 USB포트가 개발되었다. 이 USB포트의 사용으로 이들 전자제품과 컴퓨터간의 데이터공용이 가능하게 되어가고 있다.As various electronic devices such as mobile phones, digital cameras, CD players, and digital camcorders are used, USB ports have been developed to secure compatibility with these computers. The use of this USB port allows data sharing between these electronics and computers.

이러한 장점에 착안하여 실용등록제300964호에서는 가정전원을 5볼트로 다운시켜주는 어댑터에 별도의 USB포트를 설치하여 이곳을 통하여 다른 휴대폰등의 기기에 전원충전이 가능하도록 구성하였다.In light of these advantages, Practical Registration No. 300964 installed a separate USB port on the adapter to bring down the home power to 5 volts so that it can be configured to charge power to other mobile phones and other devices.

본 고안은 고압의 가정전원을 다운시켜주되 USB포트를 다중으로 구성하고, 이 포트별도 각각 다른 전압이 공급가능하도록 하여 공급전원이 다양한 여러가지 디지털 가전 제품들에 대하여 전원충전이 가능하도록하였다. 본 고안은 더나아가서 주변의 컴퓨터와 연결하는 경우 설치한 USB포트의 데이터통신선이 다른 기기에 직접 연결토록 하여 저장되어 있는 다양한 데이터들이 이들 제품에 송수신 가능하도록 하여 충전 과 함께 데이터 송수신도 가능한 전원접속장치를 개발하여, 다양한 수요자의 욕구에 충족할 수 있도록 하였다.According to the present invention, the high-voltage home power supply is turned down, but the USB port is configured in multiple, and each port can be supplied with a different voltage so that the power supply can be charged for various digital home appliances with various power supply. The present invention further provides a power connection device capable of transmitting and receiving data as well as charging and transmitting various data stored in the USB port so that the data communication line of the installed USB port can be directly connected to other devices. Developed to meet the needs of various consumers.

Description

다중 유에스비포트를 설치한 직류전압공급장치{Direct current supplier with the multiple USB port}Direct voltage supplier with multiple USB ports {Direct current supplier with the multiple USB port}

위 전원장치가 전원을 직접 USB포트에 의하여 다른 휴대기기들에 전원공급이 가능하도록 한다는 장점이 있으나 실제 실생활에 이용되는 USB포트를 공용화할 수 있는 기기들이 적어도 한 가정당 몇개에 이르게 되면서 각각의 소형전자장치별로별도의 충전장치를 설치하여야한다.The above power supply device has the advantage of being able to supply power to other mobile devices directly through the USB port, but at least one device can be shared by at least one home that can be used in real life. Separate charging devices should be installed for each electronic device.

예를 들면 휴대전화의 경우에도 제조사별로 각각 별도의 충전장치를 그리고 캠코더나 CD플레이어, MP3플레이어등도 소형 밧데리를 사용하는 경우를 제외하면 각각 별도의 충전장치를 설치하고 있다.For example, in the case of a mobile phone, a separate charging device is installed for each manufacturer, and a separate charging device is installed except for a small battery such as a camcorder, a CD player, and an MP3 player.

그결과 보통의 가정에는 수많은 충전장치가 전원소켓에 주렁주렁 매달려 혼란을 주고 복잡하게 된다.As a result, in a typical home, a large number of chargers hang around the power sockets and become confusing and complicated.

가장 문제로 되는 것은 이들 충전장치를 각각의 기기별로 휴대하고 다닐수 어없는 것이다. 즉, CD플레이어, MP3플레이어를 함께 소지하고 동시에 셀룰러폰(휴대전화)를 함께 소지하고 생활하는 사람이 점점 늘어나고, 더구나 이들 소형기기들의 성능이 고성능화하면서 사용전기용량도 늘어나게 되어 각각의 장치별로 별도의 충전장치를 휴대하지 못하는 불편함이 많다.The main problem is that these chargers cannot be carried with each device. In other words, more and more people have both a CD player and an MP3 player at the same time and have a cellular phone (mobile phone) together. Moreover, the performance of these small devices increases as the performance of these small devices increases. There is a lot of inconvenience to not carry the charger.

실용등록제300964호에서는 가정전원을 직류전원으로 하여 USB포트에 의하여 이들 장치에 직접 전원을 공급하도록 하는 직류전원장치를 개발하였으나, 그 전원공급장치가 하나의 포트로 한정되어져 위와 같이 다양한 기기에 사용할 수 없는 단점이 있다.Practical Registration No. 300964 developed a DC power supply that supplies power directly to these devices by using a USB port with the home power source as a DC power source. However, the power supply device is limited to one port and can be used for various devices as described above. There are no drawbacks.

본 고안은 직류전원공급장치에 있어서, 보디부에 외부의 USB단자에 연결가능한 USB포트를 다중으로 설치하여 휴대전화, CD플레이어, MP3플레이어등의 모든 소형기기에 직류전원공급이 가능한 멀티형태의 전원공급장치를제공하고자 한다.The present invention is a DC power supply, multi-type power supply capable of supplying DC power to all small devices such as mobile phones, CD players, MP3 players by installing multiple USB ports that can be connected to external USB terminals on the body part. To provide a supply.

본 고안은 더나아가서 단순한 전원공급장치의 기능외에도 컴퓨터에 의한 각종 데이터를 다른 USB포트에 설치된 전자기기들에 송수신 가능하도록 하여 전원공급과 동시에 각종 데이터의 송수신도 가능한 직류전원공급장치를 제공하고자한다.The present invention further provides a DC power supply capable of transmitting and receiving data at the same time as the power supply by transmitting and receiving various data by the computer to the electronic devices installed in the other USB port in addition to the function of the simple power supply.

도 1 은 본 고안의 구성도,1 is a block diagram of the subject innovation,

도 2 는 본 고안의 또다른 실시예를 도시한 구성도,2 is a block diagram showing another embodiment of the present invention,

도 3 은 컴퓨터와 연결되는 상태의 구성도,3 is a configuration diagram of a state connected with a computer;

도 4 는 본 고안의 대표적인 사시도,4 is a representative perspective view of the present invention,

도 4 는 본 고안의 또다른 실시예의 사시도임.4 is a perspective view of another embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

1:전압트랜스, 2:정류회로, 3:필터링회로, 4:정전압레귤레이터 A:직류전원공급장치 M:마이크로프로세서 100:전원공급선 110:보디부 150:USB포트 151:온.오프스위치 152: 동작표시램프DESCRIPTION OF SYMBOLS 1: Voltage transformer, 2: Rectification circuit, 3: Filtering circuit, 4: Constant voltage regulator A: DC power supply M: Microprocessor 100: Power supply line 110: Body part 150: USB port 151: On / off switch 152: Operation Indicator lamp

본 고안은 직류전원공급장치에 있어서, 보디부에 외부의 USB단자에 연결가능한 USB포트를 다중으로 설치한 직류전원공급장치에 관한 것이다.The present invention relates to a DC power supply in the DC power supply, the body portion is provided with a plurality of USB ports that can be connected to the external USB terminal.

본 고안은 더나아가서 다중으로 설치된 USB포트외에 컴퓨터의 USB포트와 직접 연결가능한 신호용 USB포트를 설치하여 컴퓨터에 의한 각종 데이터를 다른 USB포트에 설치된 전자기기들에 송수신 가능한 직류전원공급장치에 관한 것이다.The present invention further relates to a DC power supply capable of transmitting and receiving data to and from electronic devices installed in other USB ports by installing a USB port for a signal that can be directly connected to a USB port of a computer in addition to the multiple USB ports.

이하 본 고안의 대표적인 실시예를 첨부한 도면에 의하여 설명한다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

본 고안의 대표적인 구성은 도1에 도시하며, 도 2 는 또다른 실시예를 도시한 구성도이고, 도 3 은 컴퓨터와 연결되는 상태의 구성도이며, 도 4 는 본 고안의 장치의 사시도이고, 도 4 는 본 고안의 또다른 실시예의 사시도이다.Representative configuration of the present invention is shown in Figure 1, Figure 2 is a block diagram showing another embodiment, Figure 3 is a block diagram of a state connected to the computer, Figure 4 is a perspective view of the device of the present invention, 4 is a perspective view of another embodiment of the present invention.

본 고안은 고압의 전원을 강하시켜주는 전압트랜스(1), 상기한 트랜스에 의하여 강하된 교류를 직류로 변환시켜주는 정류회로(2), 상기한 정류회로에 의하여 정류된 전압을 평활하게 하는 필터링회로(3), 필터링된 전압을 일정하게 안정되게 공급하도록 하는 정전압레귤레이터(4)로 구성되는 직류전원공급장치(A)에 있어서,The present invention provides a voltage transformer (1) for lowering a high-voltage power supply, a rectifier circuit (2) for converting alternating current (AC) dropped by the transformer into a direct current (DC), and filtering to smooth the voltage rectified by the rectifier circuit. In the circuit (3), the direct current power supply (A) consisting of a constant voltage regulator (4) for supplying the filtered voltage stably and stably,

필터링처리되어져 공급된 전원을 목표한 전압으로 안정공급하도록하는 정전압레귤레이터를 통과한 전원공급선(100)을 병렬로 분지하여 보디부(110)에 병렬로 설치된 USB포트(150)들에 연결하며,Branching the power supply line 100 passed through the constant voltage regulator to supply the filtered power supply to the target voltage in a stable manner in parallel to connect to the USB port 150 installed in parallel to the body portion 110,

상기한 USB포트에는 각각 독립된 온.오프스위치(151)와 동작표시램프(152)를설치하여준 것을 특징으로 하는 다중 USB포트를 설치한 직류전압공급장치에 관한 것이다.The USB port relates to a DC voltage supply device provided with multiple USB ports, characterized in that each of the independent on and off switch 151 and the operation display lamp 152 is installed.

본 고안에서 정전압레귤레이터는 필요로 하는 전원의 종류에 따라 5에서 12볼트등 다양하게 선택가능하며, 특별이 제한을 두는 것은 아니다.In the present invention, the constant voltage regulator can be variously selected from 5 to 12 volts according to the type of power required, and there is no particular limitation.

본 고안에서 보디부(110)은 일반적인 직육면체형태와 같은 다각형태이외에도 도5에 도시하듯이 원형의 형태 혹은 타원형의 형태로 구성하고 중앙에 전원온.오프스위치를 설치하여 전체적인 전원조절도 가능하며, 그외에 다양한 형태로 구성가능하다.Body portion 110 in the present invention is configured in a circular or elliptical form as shown in Figure 5 in addition to the polygonal shape, such as a general rectangular parallelepiped, it is also possible to adjust the overall power by installing a power on / off switch in the center, In addition, it can be configured in various forms.

본 고안의 또다른 특징으로는 보디부(110)에 컴퓨터의 USB포트(200)와 신호연결가능하도록한 컴연결포트(120)를 설치하며,Another feature of the present invention is installed in the body portion 110, the COM connection port 120 to enable the signal connection with the USB port 200 of the computer,

컴연결포트의 데이터신호선((121)은 마이크로프로세서(M)에 의하여 보디부에 설치된 USB포트(150)들에 각각 신호연결되어 컴퓨터로부터의 데이터신호의 송수신이 가능하도록 구성하는 것을 특징으로 하는 다중 USB포트를 설치한 직류전압공급장치에 관한 것이다.The data signal line 121 of the COM connection port is connected to the USB ports 150 installed in the body part by the microprocessor M, respectively, so that the transmission and reception of data signals from a computer are configured. It relates to a DC voltage supply device with a USB port.

컴퓨터로 부터 공급되는 데이터신호는 보디부(110)의 내부에 마이크로프로세서(M)을 설치하여 이곳에서 각 포트에 대한 신호분배를 담당하도록 한다.The data signal supplied from the computer is to install a microprocessor (M) in the body portion 110 to be responsible for signal distribution for each port there.

본 고안의 또다른 예로서 보디부에 전체전원의 공급을 온.오프 할 수 있는 주전원스위치(200)을 설치하여 주는 것이다. 이 주전원스위치는 상기한 마이크로프로세서의 작동시 오동작시 리셋기능을 함께 추가하며, 필요에 따라서는 긴급히 전원차단이 필요할 경우 사용된다.As another example of the present invention is to install a main power switch 200 to turn on and off the supply of the entire power to the body portion. This main power switch adds a reset function in case of malfunction during the operation of the microprocessor, and is used when an emergency power cut is necessary.

본 고안의 또다른 특징으로는 보디부(110)에 설치되는 USB포트(150)들에 각각 독립된 정전압레귤레이터(41)(42)(43)(44)(45)들을 설치하고, 각각의 정전압레귤레이터에 연결된 USB포트(41-1)(42-1)(43-1)(44-1)(45-1)에 서로 다른 전압이 공급가능하도록하는 것을 특징으로 하는 다중 USB포트를 설치한 직류전압공급장치에 관한 것이다. 구체적으로는 5V에서 부터 12V 혹은 그이상의 다양한 전압을 전원으로 이용하는 경우 레귤레이터IC를 7805, 7806, 7809 등의 다양한 것으로 독립적으로 설치하여 각 레귤레이터별로 대응된 보디부의 USB포트에 출력전압을 연결하여 다양한 전자기기들의 충전용으로 이용하도록 하는 것이다. 이러한 정전압레귤레이터는 본 고안의 경우 5개의 예를 예시하였으나 이에 한정하지 않고 얼마든지 병렬로 배치하여 더욱 많은 출력전원을 발생시킬수 있다.Another feature of the present invention is to install independent constant voltage regulators 41, 42, 43, 44, 45 on the USB ports 150 installed in the body unit 110, respectively. DC voltage provided with multiple USB ports, characterized in that different voltages can be supplied to the USB ports 41-1, 42-1, 43-1, 44-1, 45-1 connected to the It relates to a supply device. Specifically, when using a variety of voltages from 5V to 12V or more as a power source, regulator ICs are independently installed in various ways such as 7805, 7806, 7809, etc., and the output voltage is connected to the USB port of the body part corresponding to each regulator. It is used to charge devices. In the present invention, the constant voltage regulator exemplifies five examples, but the present invention is not limited thereto, and the constant voltage regulator can be arranged in parallel to generate more output power.

이상 본 고안은 기존의 가정전원과 같은 고전압의 전원을 소형가전기기에 적합한 저전압으로 다운시켜 공급하도록하되, USB포트에 의하여 CD플레이어, MP3플레이어, 휴대전화등의 다양한 전원장치에 필요한 전원을 하나의 장치로 공급가능하도록 하게 되었다. 그결과 각 장치별로 별도의 충전장치를 휴대하여야하는 불편함을 일거에 해소하게 되었다.The present invention is to provide a high-voltage power supply, such as the existing home power supply to a low voltage suitable for small appliances, and to supply the power required for various power supply devices such as CD players, MP3 players, mobile phones, etc. Made available to the device. As a result, the inconvenience of having to carry a separate charging device for each device was eliminated.

또한 전원충전과 동시에 컴퓨터에 저장된 여러가지 데이터,예를 들면 노래, 메일등의 파일 혹은 그림화일, 동영상파일등도 함께 전송할 수 있어 다양한 장치를 하나로 통합관리하게 된다. 특히 휴대전화, CD플레이어, MP3플레이어등의 장치별로 별도의 충전장치를 휴대하므로서 복잡하기 이를데 없는 전기소켓주변을 간단하게 정리할 수 있고 일목요연하게 관리하게 된다.In addition, it can transfer various data stored in the computer, such as songs, e-mails, picture files, video files, etc. at the same time as the power is charged. In particular, by carrying a separate charging device for each device, such as a mobile phone, CD player, MP3 player, it is possible to easily organize and manage the area around the electric socket which is not complicated.

Claims (4)

고압의 전원을 강하시켜주는 전압트랜스(1), 상기한 트랜스에 의하여 강하된 교류를 직류로 변환시켜주는 정류회로(2), 상기한 정류회로에 의하여 정류된 전압을 평활하게 하는 필터링회로(3), 필터링된 전압을 일정하게 안정되게 공급하도록 하는 정전압레귤레이터(4)로 구성되는 직류전원공급장치(A)에 있어서,A voltage transformer (1) for lowering a high-voltage power supply, a rectifier circuit (2) for converting alternating current (AC) dropped by the transformer into a direct current (DC), and a filtering circuit for smoothing the voltage rectified by the rectifier circuit (3). In the DC power supply (A) consisting of a constant voltage regulator (4) for supplying the filtered voltage constantly and stably, 필터링처리되어져 공급된 전원을 목표한 전압으로 안정공급하도록하는 정전압레귤레이터를 통과한 전원공급선(100)을 병렬로 분지하여 보디부(110)에 병렬로 설치된 USB포트(150)들에 연결하며,Branching the power supply line 100 passed through the constant voltage regulator to supply the filtered power supply to the target voltage in a stable manner in parallel to connect to the USB port 150 installed in parallel to the body portion 110, 상기한 USB포트에는 각각 독립된 온.오프스위치(151)와 동작표시램프(152)를 설치하여준 것을 특징으로 하는 다중 USB포트를 설치한 직류전압공급장치.The USB port is a DC voltage supply device with a multi-USB port, characterized in that the independent on and off switch 151 and the operation display lamp 152 is installed in each of the USB port. 제 1 항에 있어서,The method of claim 1, 보디부(110)에 컴퓨터의 USB포트(200)와 신호연결가능하도록한 컴연결포트(120)를 설치하며,Installing the connection port 120 to enable the signal connection to the USB port 200 of the computer in the body portion 110, 컴연결포트의 데이터신호선((121)은 마이크로프로세서(M)에 의하여 보디부에 설치된 USB포트(150)들에 각각 신호연결되어 컴퓨터로부터의 데이터신호의 송수신이 가능하도록 구성하는 것을 특징으로 하는 다중 USB포트를 설치한 직류전압공급장치.The data signal line 121 of the COM connection port is connected to the USB ports 150 installed in the body part by the microprocessor M, respectively, so that the transmission and reception of data signals from a computer are configured. DC voltage supply device with USB port. 제 1 항에 있어서,The method of claim 1, 보디부(110)에 설치되는 USB포트(150)들에 각각 독립된 정전압레귤레이터(41)(42)(43)(44)(45)들을 설치하고, 각각의 정전압레귤레이터에 연결된 USB포트(41-1)(42-1)(43-1)(44-1)(45-1)에 서로 다른 전압이 공급가능하도록하는 것을 특징으로 하는 다중 USB포트를 설치한 직류전압공급장치.Independent constant voltage regulators 41, 42, 43, 44, and 45 are respectively installed in the USB ports 150 installed in the body 110, and the USB ports 41-1 connected to the respective constant voltage regulators. 42-1, 43-1, 44-1, 45-1, DC voltage supply device is installed with multiple USB ports characterized in that different voltages can be supplied. 제 1 항에 있어서,The method of claim 1, 보디부에 전체전원의 공급을 온.오프 할 수 있는 주전원스위치(200)을 설치하는 것을 특징으로 하는 다중 USB포트를 설치한 직류전압공급장치.DC voltage supply device with a multi-USB port, characterized in that the main power switch 200 that can be turned on and off the supply of full power to the body portion.
KR20-2004-0028687U 2004-10-11 2004-10-11 Direct current supplier with the multiple USB port KR200371122Y1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101199934B1 (en) 2012-04-09 2012-11-09 주식회사 매트릭스라이트 Power Supply Apparatus with Variable Output
KR101278840B1 (en) 2008-12-24 2013-07-01 주식회사 엘지화학 Laptop-computer-battery charger using a usb
KR101282257B1 (en) * 2008-04-24 2013-07-10 삼성전자주식회사 Computer system and control method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101282257B1 (en) * 2008-04-24 2013-07-10 삼성전자주식회사 Computer system and control method thereof
US8726051B2 (en) 2008-04-24 2014-05-13 Samsung Electronics Co., Ltd. Computer system for supplying electric power to external apparatus and control method thereof
KR101278840B1 (en) 2008-12-24 2013-07-01 주식회사 엘지화학 Laptop-computer-battery charger using a usb
KR101199934B1 (en) 2012-04-09 2012-11-09 주식회사 매트릭스라이트 Power Supply Apparatus with Variable Output

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