JP2000242377A - Display device - Google Patents

Display device

Info

Publication number
JP2000242377A
JP2000242377A JP11045927A JP4592799A JP2000242377A JP 2000242377 A JP2000242377 A JP 2000242377A JP 11045927 A JP11045927 A JP 11045927A JP 4592799 A JP4592799 A JP 4592799A JP 2000242377 A JP2000242377 A JP 2000242377A
Authority
JP
Japan
Prior art keywords
usb
display
switching
switching device
display device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11045927A
Other languages
Japanese (ja)
Inventor
Satoshi Shimizu
聡 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP11045927A priority Critical patent/JP2000242377A/en
Publication of JP2000242377A publication Critical patent/JP2000242377A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/40Bus coupling
    • G06F2213/4004Universal serial bus hub with a plurality of upstream ports

Abstract

PROBLEM TO BE SOLVED: To use two personal computer main bodies with one display, one USB keyboard, and other USB peripheral devices. SOLUTION: The display device 10 is equipped with a video signal switching device 11 which switches and sends video signals from two personal computers to a display part 14, a USB signal switching device 12 which switches and sends USB signals inputted from the two personal computers to a USB hub 15, and a switching device control part 13 which puts the video signal switching device 11 and USB signal switching device 12 under the control of a USB keyboard 17. The video signal and USB signal from the same personal computer are switched at the same time and sent to the display part 14 and USB hub 15 in the display through operation on the USB keyboard 17.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、複数のパソコン
をキーボード操作で使用を可能にする切り換え機能を備
えたディスプレイ装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device having a switching function for enabling a plurality of personal computers to be used by operating a keyboard.

【0002】[0002]

【従来の技術】従来、複数のパソコンを1台のディスプ
レイ装置で切り替えて使用するための切替装置はあった
が、キーボード・マウスなどの入力装置を中心とする周
辺装置をパソコン毎に用意し、表示を切り替える度にキ
ーボード・マウスを使い分ける必要があった。
2. Description of the Related Art Conventionally, there has been a switching device for switching and using a plurality of personal computers with one display device. It was necessary to use the keyboard and mouse each time the display was switched.

【0003】また、複数の入力装置を使い分けると、デ
ィスプレイ装置に表示されているパソコンと違うパソコ
ンに接続されている入力装置を誤って操作してしまうこ
とがあった。
[0003] When a plurality of input devices are properly used, an input device connected to a personal computer different from the personal computer displayed on the display device may be erroneously operated.

【0004】さらに、従来の切替装置では、切り替え作
業の度にキーボードから手を離し、切替装置を手動で行
う必要があった。
Further, in the conventional switching device, it is necessary to release the hand from the keyboard every time the switching operation is performed, and to manually perform the switching device.

【0005】また、USBキーボード添付のパソコンが
増えていること、USB対応周辺装置が増えていること
から、USBハブを内蔵することにより、簡単な仕組み
で入力装置以外のUSB周辺装置も同時に切り替えて使
用することが可能となっている。
[0005] In addition, since the number of personal computers with a USB keyboard is increasing and the number of USB-compatible peripheral devices is increasing, a USB hub is built in, so that USB peripheral devices other than the input device can be simultaneously switched by a simple mechanism. It is possible to use it.

【0006】[0006]

【発明が解決しようとする課題】上述したように、複数
のパソコンを1台のディスプレイ装置で切り替えて使用
する従来の切替装置では、キーボード・マウスなどの入
力装置がパソコンの台数分必要であり、机上のスペース
も広く必要であるという問題があった。
As described above, in a conventional switching device that switches and uses a plurality of personal computers with one display device, input devices such as a keyboard and a mouse are required for the number of personal computers. There was a problem that a large desktop space was required.

【0007】また、ディスプレイに表示されているパソ
コンと異なるパソコンに接続された入力装置を誤って操
作することで、誤入力してしまうという問題があった。
Another problem is that an erroneous operation of an input device connected to a personal computer different from the personal computer displayed on the display results in an erroneous input.

【0008】さらに、従来の切替装置では、キーボード
から手を離して切替装置を手動で行う必要があり、頻繁
な切り替えには向かないという問題があった。
Furthermore, the conventional switching device has a problem in that it is necessary to release the hand from the keyboard and to manually perform the switching device, which is not suitable for frequent switching.

【0009】なお、従来の切替装置の一例が特開平10
−63382号公報に記載されている。この公報に記載
の発明は、入力装置を誤って操作することにより誤入力
してしまうという問題を解決するものであるが、上述し
た問題を全て解決するものではない。
An example of a conventional switching device is disclosed in
-63382. The invention described in this publication solves the problem of erroneous input due to erroneous operation of the input device, but does not solve all the above-mentioned problems.

【0010】この発明の目的は、上述した問題を解決す
る切替機能を備えたディスプレイ装置を提供することに
ある。
It is an object of the present invention to provide a display device having a switching function that solves the above-mentioned problem.

【0011】[0011]

【課題を解決するための手段】この発明は、USBハブ
を内蔵するディスプレイ装置において、複数台のパソコ
ンから入ってきた映像信号を切り替えて表示部に送る映
像信号切替装置と、複数台のパソコンから入ってきたU
SB信号を切り替えて前記USBハブに送るUSB信号
切替装置と前記映像信号切替装置とUSB信号切替装置
とをUSB入力装置で制御可能にする切替装置制御部と
を備え、前記USB入力装置からの操作で同一パソコン
からの映像信号とUSB信号を同時に切り替えてディス
プレイ内の表示部とUSBハブに送ることができること
を特徴とする。
SUMMARY OF THE INVENTION The present invention relates to a display device having a built-in USB hub, which switches a video signal input from a plurality of personal computers and sends it to a display unit. U entered
A USB signal switching device for switching an SB signal to send to the USB hub, a switching device control unit for controlling the video signal switching device and the USB signal switching device with a USB input device, and an operation from the USB input device. Thus, the video signal and the USB signal from the same personal computer can be simultaneously switched and sent to the display unit in the display and the USB hub.

【0012】この発明によるディスプレイ装置は、2台
のパソコン本体を1台のディスプレイと1台のUSBキ
ーボード、マウス、その他のUSB周辺装置で使用する
ことを可能にする切替装置を有し、接続されたキーボー
ドにより切替操作が可能なディスプレイである。
The display device according to the present invention has a switching device that enables two personal computers to be used with one display and one USB keyboard, mouse, and other USB peripheral devices. It is a display that can be switched using a keyboard.

【0013】[0013]

【発明の実施の形態】次に、この発明の実施の形態につ
いて図面を参照して説明する。
Next, an embodiment of the present invention will be described with reference to the drawings.

【0014】図1は、この発明のディスプレイ装置の実
施の形態を示すブロック図である。図1に示すディスプ
レイ装置10は、2つの映像信号入力コネクタ(映像コ
ネクタSC1 ,SC2 )と、2つのUSB信号入力コネ
クタ(USBコネクタUC1,UC2 )を有し、パソコ
ンP1 とパソコンP2 からの映像信号とUSB信号を入
力可能である。
FIG. 1 is a block diagram showing an embodiment of a display device according to the present invention. Display device 10 shown in FIG. 1, the two video signals input connector (video connector SC 1, SC 2), has two USB signal input connector (USB connector UC 1, UC 2), the personal computer P 1 and the PC the video signal and the USB signal from the P 2 can be input.

【0015】また、2台のパソコンから入ってきた映像
信号を切り替える映像信号切替装置11と、2台のパソ
コンから入ってきたUSB信号を切り替えるUSB信号
切替装置12とを備え、さらに、これらをキーボードで
制御可能にする切替装置制御部13を備えている。これ
によりキーボード操作で同一パソコンからの映像信号と
USB信号を同時にディスプレイ内の表示部14とUS
Bハブ15に送ることができる。
Further, there are provided a video signal switching device 11 for switching video signals input from two personal computers, and a USB signal switching device 12 for switching USB signals input from two personal computers. And a switching device control unit 13 which can be controlled by the control unit. This allows the video signal and the USB signal from the same personal computer to be simultaneously transmitted to the display unit
It can be sent to the B hub 15.

【0016】さらに、USBポートが2つ付いたUSB
ハブ15を備えており、USBポートの1つには、US
Bマウス16を接続可能なUSBキーボード17を接続
し、他の1つには、その他使用したい別のUSB装置Q
1 を接続することができる。
Further, a USB with two USB ports
It has a hub 15 and one of the USB ports
A USB keyboard 17 to which a B mouse 16 can be connected is connected, and another USB device Q to be used is connected to another one.
One can be connected.

【0017】次に、この発明の実施の形態の動作につい
て説明する。
Next, the operation of the embodiment of the present invention will be described.

【0018】図1において、パソコンP1 の映像信号S
1 をディスプレイ装置10の映像コネクタSC1 に、U
SB信号U1 をUSBコネクタUC1 に、また、パソコ
ンP 2 の映像信号S2 を映像コネクタSC2 に、USB
信号U2 をUSBコネクタUC2 にそれぞれ接続する。
In FIG. 1, a personal computer P1Video signal S
1To the video connector SC of the display device 10.1And U
SB signal U1USB connector UC1Pasoko
P TwoVideo signal STwoTo the video connector SCTwoAnd USB
Signal UTwoUSB connector UCTwoConnect to each.

【0019】映像信号切替装置11とUSB信号切替装
置12は、キーボード操作可能な切替装置制御部13に
接続されており、切替操作用に設定した複数キーを同時
に押すことにより接続先のパソコンを切り替えることが
可能である。切替操作用の複数キーの設定はユーザが自
由に行え、アプリケーションソフトで使用するショート
カットキーと重ならないよう設定することができる。
The video signal switching device 11 and the USB signal switching device 12 are connected to a switching device control unit 13 which can be operated by a keyboard, and switches the connected personal computer by simultaneously pressing a plurality of keys set for the switching operation. It is possible. The setting of a plurality of keys for the switching operation can be freely performed by the user, and can be set so as not to overlap with the shortcut keys used in the application software.

【0020】また、映像信号切替装置11とUSB信号
切替装置12が連動することにより、映像信号S1 が有
効なときにはUSB信号U1 が有効になり、映像信号S
2 が有効なときはUSB信号U2 が有効になるよう各信
号が切り替えられる。これにより、USBハブ15に接
続した周辺装置は、常に表示部14に表示されるパソコ
ンに接続されることになる。
The video signal switching device 11 and the USB signal switching device 12 are linked, so that when the video signal S 1 is valid, the USB signal U 1 is valid and the video signal S 1 is valid.
When 2 is enabled is switched signals to USB signals U 2 is enabled. Accordingly, the peripheral device connected to the USB hub 15 is always connected to the personal computer displayed on the display unit 14.

【0021】以上のように、この実施の形態は、キーボ
ードで制御可能な切替装置により映像信号S1 とUSB
信号U1 または映像信号S2 とUSB信号U2 を同時に
切り替えることによりこの装置のUSBハブに接続され
たUSBキーボードなどの周辺装置は、常にディスプレ
イに表示されているパソコンに接続されることとなり、
2台のパソコンを1台の周辺装置でスムーズに使用可能
にすることができる。
As described above, in this embodiment, the video signal S 1 and the USB signal are switched by the switching device controllable by the keyboard.
By simultaneously switching the signal U 1 or the video signal S 2 and the USB signal U 2 , a peripheral device such as a USB keyboard connected to a USB hub of the device is always connected to a personal computer displayed on a display,
It is possible to smoothly use two personal computers with one peripheral device.

【0022】次に、この発明の他の実施の形態について
説明する。
Next, another embodiment of the present invention will be described.

【0023】図2は、この発明の他の実施の形態を示す
ブロック図である。図2に示すディスプレイ装置20
は、映像コネクタおよびUSBコネクタをN個装備し、
切替装置制御部23により映像信号切替装置21とUS
B信号切替装置22を連動して動作させることにより、
N台のパソコン(P1 〜PN )を1台のディスプレイ装
置20と1台のUSBキーボード17、USBマウス1
6等で使用することが可能となっている。
FIG. 2 is a block diagram showing another embodiment of the present invention. The display device 20 shown in FIG.
Is equipped with N video connectors and N USB connectors,
The video signal switching device 21 and the US
By operating the B signal switching device 22 in conjunction,
N personal computers (P 1 to P N ) are connected to one display device 20, one USB keyboard 17 and USB mouse 1
6 and so on.

【0024】また、USBハブ25に(M+1)個のU
SBポート(UP1 〜UPM )を装備することにより、
キーボード以外のUSB周辺装置をM個接続して表示と
連動して使用することも可能となる。
The USB hub 25 has (M + 1) U
Equipped with SB ports (UP 1 to UP M ),
It is also possible to connect M USB peripheral devices other than the keyboard and use them in conjunction with the display.

【0025】[0025]

【発明の効果】以上説明したように、通常、2台のパソ
コンを1台のディスプレイ装置で表示を切り替えて使用
する場合、入力装置はパソコンの台数分必要であり、机
上のスペースも広く必要としていたが、この発明のディ
スプレイ装置は、USBキーボード・マウスなどの周辺
装置が1台で済み、スペースを有効に活用することがで
きる。
As described above, in the case where two personal computers are used by switching the display with one display device, the input devices are required by the number of the personal computers, and the space on the desk is also required. However, the display device of the present invention requires only one peripheral device such as a USB keyboard and a mouse, and can effectively utilize space.

【0026】また、複数の入力装置を使い分けると、デ
ィスプレイ装置に表示されているパソコンと違うパソコ
ンに接続されている入力装置を誤って操作してしまい、
誤入力される恐れがあるが、この発明のディスプレイ装
置では、入力装置は接続先のパソコンの種類を意識する
ことなく、常にディスプレイ装置に表示されるパソコン
を操作でき、誤操作も防止できるとともに、USBハブ
に接続した対応周辺装置も接続されているパソコンの種
類を意識することなく、表示と連動して使用することが
できる。
When a plurality of input devices are properly used, an input device connected to a personal computer different from the personal computer displayed on the display device is erroneously operated.
Although there is a risk of erroneous input, in the display device of the present invention, the input device can always operate the personal computer displayed on the display device without being conscious of the type of the connected personal computer, and can prevent erroneous operation, and can also use the USB device. Corresponding peripheral devices connected to the hub can also be used in conjunction with the display without being aware of the type of personal computer connected.

【0027】さらに、この発明では、キーボード操作に
より切り替え作業を行えるため、キーボードから手を離
すことなく、アプリケーションソフトを切り替えて使用
する感覚で2台のパソコンを切り替えて使用することが
できる。
Further, according to the present invention, since the switching operation can be performed by operating the keyboard, the two personal computers can be switched and used as if switching the application software without using the keyboard.

【図面の簡単な説明】[Brief description of the drawings]

【図1】この発明のディスプレイ装置の実施の形態を示
すブロック図である。
FIG. 1 is a block diagram showing an embodiment of a display device of the present invention.

【図2】この発明の他の実施の形態を示すブロック図で
ある。
FIG. 2 is a block diagram showing another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

10,20 ディスプレイ装置 11,21 映像信号切替装置 12,22 USB信号切替装置 13,23 切替装置制御部 14,24 表示部 15,25 USBハブ 16 USBマウス 17 USBキーボード P1 〜PN パソコン S1 〜SN 映像信号 U1 〜UN USB信号 SC1 〜SCN 映像コネクタ UC1 〜UCN USBコネクタ UP1 〜UPM USBポート Q1 〜QM その他のUSB装置10 and 20 display device 11, 21 a video signal switching device 12, 22 USB signal switching device 13, 23 switching device control unit 14, 24 display unit 15, 25 USB hub 16 USB mouse 17 USB keyboard P 1 to P N PC S 1 to S N video signals U 1 ~U N USB signal SC 1 to SC N video connector UC 1 to UC N USB connector UP 1 ~UP M USB port Q 1 to Q M other USB device

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】複数台のパソコン本体を1台のディスプレ
イと、1台のUSB入力装置と、その他のUSB周辺装
置で使用することを可能にする切替装置を有し、接続さ
れた前記USB入力装置により切替操作が可能なことを
特徴とするディスプレイ装置。
1. A USB input device comprising a switching device for enabling a plurality of personal computer bodies to be used by one display, one USB input device, and other USB peripheral devices. A display device characterized in that a switching operation can be performed by the device.
【請求項2】前記USB入力装置の操作により前記パソ
コンからの映像信号、USB信号を同時に切り替えるこ
とを特徴とする請求項1に記載のディスプレイ装置。
2. The display device according to claim 1, wherein a video signal and a USB signal from the personal computer are simultaneously switched by operating the USB input device.
【請求項3】USBハブを内蔵するディスプレイ装置に
おいて、 複数台のパソコンから入ってきた映像信号を切り替えて
表示部に送る映像信号切替装置と、 複数台のパソコンから入ってきたUSB信号を切り替え
て前記USBハブに送るUSB信号切替装置と前記映像
信号切替装置とUSB信号切替装置とをUSB入力装置
で制御可能にする切替装置制御部とを備え、 前記USB入力装置からの操作で同一パソコンからの映
像信号とUSB信号を同時に切り替えてディスプレイ内
の表示部とUSBハブに送ることができることを特徴と
するディスプレイ装置。
3. A display device having a built-in USB hub, wherein a video signal switching device for switching video signals input from a plurality of personal computers and sending it to a display unit, and a USB signal input from a plurality of personal computers for switching. A USB signal switching device for sending to the USB hub, a video signal switching device, and a switching device control unit that enables the USB signal switching device to be controlled by a USB input device; A display device wherein a video signal and a USB signal can be simultaneously switched and sent to a display unit in a display and a USB hub.
【請求項4】前記USBハブに複数個のUSBポートを
備え、USBポートの1つには、前記USB入力装置を
接続し、他のUSBポートには使用したい別のUSB装
置を接続することができることを特徴とする請求項3に
記載のディスプレイ装置。
4. The USB hub may include a plurality of USB ports, one of the USB ports may be connected to the USB input device, and the other USB port may be connected to another USB device to be used. The display device according to claim 3, wherein the display device is capable of performing the following operations.
【請求項5】前記USB入力装置は、マウスを接続可能
なUSBキーボードであることを特徴とする請求項4に
記載のディスプレイ装置。
5. The display device according to claim 4, wherein the USB input device is a USB keyboard to which a mouse can be connected.
【請求項6】前記USBキーボードから切替操作用に設
定した複数キーを同時に押すことにより接続先のパソコ
ンを切り替えることを特徴とする請求項5に記載のディ
スプレイ装置。
6. The display device according to claim 5, wherein a connection destination personal computer is switched by simultaneously pressing a plurality of keys set for a switching operation from said USB keyboard.
JP11045927A 1999-02-24 1999-02-24 Display device Pending JP2000242377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11045927A JP2000242377A (en) 1999-02-24 1999-02-24 Display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11045927A JP2000242377A (en) 1999-02-24 1999-02-24 Display device

Publications (1)

Publication Number Publication Date
JP2000242377A true JP2000242377A (en) 2000-09-08

Family

ID=12732903

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11045927A Pending JP2000242377A (en) 1999-02-24 1999-02-24 Display device

Country Status (1)

Country Link
JP (1) JP2000242377A (en)

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KR20040008365A (en) * 2002-07-18 2004-01-31 삼성전자주식회사 Apparatus and method for display
KR100471057B1 (en) * 2001-07-10 2005-03-08 삼성전자주식회사 portable computer and method for reproducing video signal on screen thereof
KR100490068B1 (en) * 2004-09-22 2005-05-17 서명석 Teaching desk with interface
JP2005266951A (en) * 2004-03-16 2005-09-29 Fujitsu Component Ltd Switching device and computer system equipped with the switching device
US7059722B2 (en) 2001-01-19 2006-06-13 Mitsubishi Denki Kabushiki Kaisha Projector, network system including projector, and method of controlling projector on network system
US7185126B2 (en) 2003-02-24 2007-02-27 Standard Microsystems Corporation Universal serial bus hub with shared transaction translator memory
US7340556B2 (en) 2001-11-09 2008-03-04 Aten International Co., Ltd. Signal switch for console and peripheral devices
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US7769940B2 (en) 2008-02-13 2010-08-03 Belkin International, Inc. Switching device configured to couple a first computer to a first peripheral device and one or more second peripheral devices and method of manufacturing same
US7882297B2 (en) 2009-02-20 2011-02-01 Standard Microsystems Corporation Serial bus hub with low power devices
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US8176226B2 (en) 2001-11-09 2012-05-08 Aten International Co., Ltd. KVMP switch allowing asynchronous and synchronous switching for console devices and peripheral devices among different computers
US8185759B1 (en) 2008-11-06 2012-05-22 Smsc Holdings S.A.R.L. Methods and systems for interfacing bus powered devices with host devices providing limited power levels
US8332545B1 (en) 2011-05-31 2012-12-11 Smsc Holdings S.A.R.L. USB switch which allows primary USB connection in response to USB signaling
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US7150534B2 (en) 2001-01-19 2006-12-19 Mitsubishi Denki Kabushiki Kaisha Projector, network system including projector, and method of controlling projector on network system
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JP2011014173A (en) * 2001-11-09 2011-01-20 Aten Internatl Co Ltd Signal switch for console device and peripheral device
US7340556B2 (en) 2001-11-09 2008-03-04 Aten International Co., Ltd. Signal switch for console and peripheral devices
US7472217B2 (en) 2001-11-09 2008-12-30 Aten International Co., Ltd. Asynchronous/synchronous KVMP switch for console and peripheral devices capable of switching KVM channels and peripheral channels to common or different computers
US8176226B2 (en) 2001-11-09 2012-05-08 Aten International Co., Ltd. KVMP switch allowing asynchronous and synchronous switching for console devices and peripheral devices among different computers
US8140734B2 (en) 2001-11-09 2012-03-20 Aten Technology Inc. Asynchronous/synchronous switching of console devices and peripheral devices
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US7185126B2 (en) 2003-02-24 2007-02-27 Standard Microsystems Corporation Universal serial bus hub with shared transaction translator memory
US7484018B2 (en) 2003-02-24 2009-01-27 Standard Microsystems Corporation Universal serial bus hub with shared high speed handler implementing respective downstream transfer rates
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US7627708B2 (en) 2006-04-14 2009-12-01 Standard Microsystems Corporation Multi-host USB device
US7523243B2 (en) 2006-04-14 2009-04-21 Standard Microsystems Corporation Multi-host USB device controller
US7478191B2 (en) 2006-04-14 2009-01-13 Standard Microsystems Corporation Method for automatically switching USB peripherals between USB hosts
US7480753B2 (en) 2006-04-27 2009-01-20 Standard Microsystems Corporation Switching upstream and downstream logic between ports in a universal serial bus hub
US7624202B2 (en) 2006-08-17 2009-11-24 Standard Microsystems Corporation System and method for enumerating a USB device using low power
US7631111B2 (en) 2006-08-17 2009-12-08 Standard Microsystems Corporation System method for rapidly charging USB device's battery wherein USB device requests charging the battery at a higher power level
US7769940B2 (en) 2008-02-13 2010-08-03 Belkin International, Inc. Switching device configured to couple a first computer to a first peripheral device and one or more second peripheral devices and method of manufacturing same
US8185759B1 (en) 2008-11-06 2012-05-22 Smsc Holdings S.A.R.L. Methods and systems for interfacing bus powered devices with host devices providing limited power levels
US7882297B2 (en) 2009-02-20 2011-02-01 Standard Microsystems Corporation Serial bus hub with low power devices
JP2011100231A (en) * 2009-11-05 2011-05-19 Nec Access Technica Ltd Switching device, display device, operation control method, and program
US8332545B1 (en) 2011-05-31 2012-12-11 Smsc Holdings S.A.R.L. USB switch which allows primary USB connection in response to USB signaling
US8880748B2 (en) 2011-05-31 2014-11-04 Smsc Holdings S.À.R.L. Switching system which allows primary USB connection in response to USB signaling
US8843770B2 (en) 2011-10-31 2014-09-23 Smsc Holdings S.A.R.L. Device charging over USB using a plurality of handshakes

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